EP1156384A2 - Method and apparatus for adjusting registration in a colour printer and colour printer - Google Patents

Abstract

The method involves referencing image formations (11,11') on image cylinders (2,2') w.r.t. print substrates (15) to achieve a register match with sub-color images (7,7'...) when printing. Position referencing of the image formations on the image cylinders w.r.t. the print substrates is performed independently of time, at least for a defined region of all sub-color images. Independent claims are also included for an apparatus for setting the register, and for a multicolor printing machine.

Description

The invention relates to a method for register adjustment on a multi-color printing press with different printing inks assigned color printing units with image cylinders, Devices for generating images, in particular electrostatic latent images, on the image cylinders, a carrier for printing substrates and image transfer points for the transfer of the partial color images from the color printing units to the printing substrates, with an assignment of the image generation on the image cylinders to achieve a register match of the part-color images when printing becomes.

The invention further relates to a device for register adjustment after Process described above on a multi-color printing machine with different Color printing units assigned to printing inks with image cylinders, devices for Generation of images, in particular electrostatic latent images, on the Image cylinders, a carrier for printing substrates and image transfer points for the Transfer of the partial color images from the color printing units to printing substrates, sensors for position detection and at least one setting device for Assignment of the positions of the image generation points on the image cylinders to the Printing substrates to achieve register matching of the partial color images when printing. The invention further relates to a suitably equipped multicolor printing machine.

The printing of colored representations, in particular colored images, takes place in that several partial color images are printed on top of each other. These are usually the ones Colors yellow, magenta and cyan as well as black. Special colors are also available if required added. By printing these colors on top of each other you can create all color compositions achieve. The quality of the prints depends largely on the register Print the partial color images on top of each other. In conventional, not automated Printing processes are the printing forms by means of test printing and with corrected the printed register marks until an exact overprinting, that is, a register of the print is achieved.

In digital printing processes, the image cylinders are each made by means of an image generation device described with pixels, for example by electrostatic Charges generated and these are provided with adhering color pigments. The color pigments are then transferred to a printing substrate. With digital The printing process can maintain register accuracy by using the image forming devices be controlled accordingly. Since the illustration for every print new, does not have to be a one-off as with conventional printing processes Setting can be made, but it can be a preset and a Regulation should be provided, which makes corrections for each individual print. Of course, this does not only apply to the application of electrostatic latent materials Images but also all other printing processes, in which by means of a digital Control pixels can be applied.

For an electrostatic printing process of the type mentioned at the outset, of US 5, 287, 162 proposed register marks preferably on the carrier for the Print substrates and capture them by a device. Ascertained are the times that the registration marks are generated by the image generation devices up to a registration point. These times will be then used to determine the times at which the imaging devices undertake the imaging of the individual image cylinders in order to achieve the To achieve register accuracy after transferring the images to a printing substrate.

Since achieving agreement on the imaging of the image cylinders with speed differences with respect to the surfaces of the image cylinders to inaccuracies leads has been proposed by US 5, 287, 162, calibration tables with times to record the different angular positions of the image cylinders, in order to use the calibration values to make regular fluctuations - mostly from Out of roundness of the cylinders result - to eliminate, and in this way the Make corrections for each individual print.

Because the register accuracy required for high print quality is extremely high Precision is required, such calibration tables, in which time values are set, however insufficient. Irregularities that are not taken into account not in differences of time spans which rotation angles are assigned to the image cylinder can be put down. For the latter in particular, a suggestion from the does not help US 5, 287, 162, to recreate the calibration tables again and again, because this means only one long-term and slow drifting of values, but no short-term, not angular positions the image cylinder assignable differences can be taken into account.

A typical example of such irregularities that do not differ in differences from Periods of time, fluctuations in the speed of the drive system, since the assignment of the same to certain angles of rotation of the image cylinder or other cylinders is not possible because these fluctuations are not synchronous with the Have angular positions of the image cylinder or other cylinders. A regulation through a calibration table of the proposed type with time values representing the angles of rotation the image cylinder is assigned, would therefore produce errors rather than errors eliminate. For example, studies have found that the poles of the Electric drive motors as the cause of frequency-like speed fluctuations of the drive occur due to the different transmission paths also have no simultaneous occurrence on all image cylinders and therefore lead to time-position differences on the individual image cylinders. These frequency-like Variations are sufficient to cause errors in the register setting.

Such errors can occur at the beginning of the picture or can change in quality Errors in partial areas of images, for example as cross-strip-like register inaccuracies to make noticable. Since such frequency-like fluctuations of the Drive system with other errors, such as the out-of-roundness of image cylinders, it is no longer possible with reasonable effort to calibrate calibration tables Create correction. These could no longer be determined by the angular positions of the Image cylinder or other cylinder for one revolution or for a manageable Orientation sequence of revolutions, but it should - as far as this by the Complexity is possible at all - a course of calibration values over complex Machine constellations determined until a repetition situation occurs become. Such a creation of correction values over longer periods is available but again counter that there are other causes of error such as irregularities the leadership of the carrier and, above all, long-term changes, such as Temperature changes, change of mechanical stresses in the machine, Changes in paper type, amount of toner, etc. Such a "colorful mix" of Errors that change at short notice and synchronized with the angular positions of cylinders behave with errors that are also in the short term but not in sync with the Changing angular positions and long-term asynchronous changes is the achievement high precision through a correction using the suggested calibration tables with current values.

The invention is therefore based on the object of a method, a device and to design a printing press of the type mentioned in such a way that a high Precision of register setting with reasonable effort, especially if possible without waste prints, can be achieved. It should be both quick and possible exact presetting as well as constant quick correction of the register setting be made possible.

The object is achieved with respect to the method in that a time-independent position assignment of the image generation on the image cylinders to the Print substrates of at least a defined area of all part color images.

With regard to the device, the object is achieved in that the Sensors for the detection of the positions of image- and substrate-bearing elements are formed and that at least one setting device is designed such that they match the positions of the imaging on the imaging cylinders to the printing substrates independent of time with respect to at least one defined area of the partial color images assigns.

A multi-color printing machine with such a device is also proposed.

The invention is based on the observation that presetting and / or regulation of a register, in which recorded times are related to one another an increase in the complexity of error overlays leads to the actual Register error causes errors due to the determination of positions by times to be added. This addition of another cause of error is for countermeasures problematic because the latter errors are occurring at short notice and asynchronous to the angular positions of the image cylinders cautious error.

The invention is further based on the knowledge that if one instead of the times positions directly related to each other that are out of sync For the most part, angular positions of cylinders no longer cause errors occur because they come from the time-position assignment. So you influence one Setting the register does not occur when there is an immediate mutual assignment from positions to the basis of control or regulation. Such immediate Position assignments can for example be designed such that one Associates distances or paths or angular positions. By the invention The frequency-like fluctuations of the drive system have a measure or similar sources of error no longer influence the register setting, because the positions are recorded immediately and no longer by way of detours.

The invention ensures that the short-term fluctuations still remaining are essentially synchronous with the angular positions of the image cylinders or other cylinders, related to one revolution or a short sequence of revolutions, to repeat. It is therefore also possible to use calibration tables for image generation in to create each printing unit that is valid for a certain period. Long term Changes can then be taken into account during printing by that calibration tables, which are based on the acquisition of positions, again and again to be renewed. Such a renewal of calibration tables corrects a slow one Drift. The calibration tables are almost only through the measure according to the invention error-free, because the short-term, asynchronous to the angular positions of the Image cylinder-related errors are largely avoided and that on position assignment no longer influence the register settings. Of course However, the invention is not limited to calibration tables. Calibration tables are only an embodiment, but these are only for precision adjustment by the invention useful.

The invention makes it possible to eliminate almost all sources of errors in image or print substrate transmission Capture and eliminate items since the short term Most of the errors are reduced to errors that occur synchronously with angular positions and the longer-term in relation to one repetition per revolution Have errors separated from the latter. It does not matter whether they are still remaining errors on diameter errors or imbalance of image cylinders or further cylinders transferring the images are based. There can also be transmission errors through the behavior of elastic material like that of cylinder jackets different contact forces or due to differences in mechanical stresses of substrates for printing substrates or the delivery of a backing roller that the Image transmission to a substrate is used to capture and eliminate, since these errors the Angular positions of the respective image- or substrate-bearing components in synchronous Can be assigned in this way and can therefore be corrected using calibration tables to be created in each case.

There are two ways of determining the correction values for image generation: A calibration table can be provided for each image cylinder, which cycle up to for the occurrence of a repetition. Such a cycle can be one revolution or be a sequence of revolutions. However, it would also be conceivable for other image or substrate transmitting elements with respect to all positions up to Repeat the same calibration tables to create the imaging of the image cylinder by a calculation from the values of all calibration tables with an elimination of all differences that occur in their impact on those to be coordinated Positions. By constantly determining positions during the Pressure can also be drifted slowly, for example due to temperature differences and detect and eliminate tensions in the machine. Of course, too Errors can be detected and eliminated due to changes in the printing substrate used, Changes to the images or the toner or due to other influences occur.

The position assignment according to the invention is different with or without a calibration table Way possible. For example, angular positions or paths from Surfaces of image- and substrate-bearing elements can be assigned to each other. Also a combination of angular positions and paths is possible. It is convenient one of the elements taken as a reference. An embodiment of the The method therefore proposes that the at least one for the partial color images defined area on the image cylinders at predetermined positions of the support is produced. Another suggestion is that at least one is defined Area of the partial color image of a reference printing unit at least one defined Area of the partial color images of the other color printing units is assigned and that then an assignment to a position of the carrier is made.

With regard to the device, one proposal is that the at least one Setting device is designed such that it generates at least one defined area of all partial color images on the respective image cylinders to predetermined Carrier positions caused. Depending on the above chosen The setting device can also have another corresponding training exhibit.

For the position assignments of the carrier, a proposal provides that the angular positions the drive roller of the carrier can be used. Position assignments for you too the angular positions of the image cylinders can be used. Another possibility is to use the for the position assignments of the carrier Ways of using the surface of the carrier. Accordingly, for the Position assignments of the image cylinders the paths of the surfaces of the image cylinders be used.

Regarding the device is used for the use of the angular positions Position assignment suggested that at least one sensor as an angular position transmitter is formed, wherein for each element whose angular positions are to be detected, a sensor is proposed. Furthermore, at least one setting device be designed to assign angular positions. It can additionally at least a sensor for detecting a concentricity error can be provided, and at least one Adjustment device, the positions from angular positions and concentricity errors determined. The purpose is that it is based on the paths actually traveled defined areas of the partial color images arrives and runout errors lead to the fact that the angular positions are not an exact measure. A corresponding correction can by the proposed detection of concentricity errors, the said Errors can be avoided and still the relatively simple position detection and assignment through the angular positions is possible.

For a position determination by paths, it is proposed that at least one Sensor is designed to detect paths, with each element, the paths to be detected, a sensor is proposed. Here, an embodiment consist in the fact that sensors are trained for the detection of path markings and the latter are attached to the corresponding surfaces. Then must continue at least one setting device can be designed to assign routes.

For machines which additionally have image transfer cylinders, which are arranged between the image cylinders and the carrier, it is proposed that the positions of image transfer cylinders are also included in the position assignments become. For the position assignments of the image transfer cylinders whose angular positions are used or it is possible that the paths of the Surfaces of the image transfer cylinders serve to assign the same position. With regard to the device, at least one sensor must then be used to detect the Positions of the image transfer cylinder can be provided and these positions at least transmitted to a setting device for calculating the assignment become. Here too, both an angular position transmitter, if appropriate, can serve as the sensor combined with a sensor to detect a concentricity error, or it is possible that a sensor is provided for the detection of paths.

An embodiment of the method according to the invention provides that the one another assigned defined areas of the partial color images are the beginning of the image. For making this assignment, at least one setting device is designed such that it specifies the positions of the carrier at which the start of the imaging of the Image cylinder takes place.

In order to achieve exact register accuracy of the images across all image areas, provided that the mutually assigned defined areas are the areas of the partial color images in which the image areas are divided. In the areas of partial color images can be individual or a number of pixel lines of the Trade partial color images. In the former case, the pixel rows are assigned the partial color images, in the latter case an assignment of the number of pixel lines, to achieve register consistency. One for the assignment of An advantageous embodiment provides that the number of pixel lines of a range from the assignment to defined angular intervals of the Image cylinder results. In addition to the positions in the direction of movement, the lateral position of the areas can be determined and adjusted. Preferably, too Errors in the lateral extent of the areas determined and corrected.

To make these adjustments and corrections is regarding the procedure at least one setting device designed such that it positions the Carrier specifies in which the imaging of the image cylinder with the areas in which is divided into the image area. The areas can be strips that extend across the image area transversely to the direction of movement. For a lateral Setting, however, these strips can also be divided transversely again or it a lateral adjustment is made that directly relates to the spacing of the pixels relates.

A particularly useful embodiment of the invention provides that the positions be determined by means of register marks. Such a determination of the positions can both before performing a print to make the adjustment, as well as while printing to make corrections to the values. The register marks preferably have arranged in the transport direction, spaced elements in a predetermined manner, wherein the distances are detected. Such register marks are printed by each color printing unit, the individual color printing units can form individual elements printed rows or several spaced elements printed one after the other by individual color printing units can be. The register marks can be continuous or in groups, which in turn can have defined distances from one another. This allows the positions mentioned to be determined and assigned. Should they Positions are determined before printing, it is advisable to use the registration marks to print directly on the carrier and to remove it again after determining the position. During printing it is useful if the register marks are not in the Print substrates covered space of the carrier can be printed. However, it is also possible to print the register marks on paper, this can be a sample sheet or it is possible to use image-free edges of the printing substrates for this. Regarding the The device can provide at least one sensor for detecting register marks become. This is expediently designed such that it the distances of the in elements of the register marks spaced apart in a predetermined manner.

After collecting the data for all color printing units are expedient by means of an appropriately programmed computing device by analyzing the positions determined the deviations of the actual values from the target values for the image starts the deviations of the actual values from the target values for the other areas, into which the image areas are divided. The values are then on Setting devices for the beginning of the picture and setting devices for the given defined areas of the partial color images. These settings are equipped with machine-specific nominal values, which are designed in such a way that they have correction values for determining the positions on the image cylinders before the start of printing consider. Is it a machine in which the image cylinder transfer the image directly to the substrates, so is the way of the Image generation points up to the image transfer points of the image cylinders are decisive. If it is a machine that has image transfer cylinders, it comes the path from the image transfer point between the image cylinder and the image transfer cylinder up to the image transfer point on the substrate. Furthermore, the Adjustment devices can be designed such that they correct values after the start of printing account for the positions.

After the positions for the beginning of the image have been determined, the individual image cylinders defined these positions for the image generation of the others Areas on the individual image cylinders based on the former are determined and in this sequence is used for control or regulation. To this The register for the position of the beginning of the partial color images and is first of all made then set the position for individual image areas.

Advantageously, there is noise in the recorded values, that is to say very briefly Fluctuations that occur (to avoid regular instability) for the evaluation eliminated. The remaining fluctuations in the determined position values are also the in terms of magnitude and repetition of a repeatable position of a Cylinders are assignable, separated from long-term fluctuations. The fluctuations of the determined position values, their magnitude and repetition a repeatable position of an image cylinder can be assigned in at least one calibration table for this image cylinder and for the error-compensating one Control of the positions of the imaging stations to generate the Images of the respective image cylinders are used. The calibration tables are expedient both for the beginning of the partial color images and for the defined ones Areas of the partial color images created.

For other image- or substrate-transferring elements you can also repeat them Deviations of the actual positions that can be assigned to positions in a movement cycle captured by the target values and in the calculation of the imaging sites for elimination of these deviations are included. These are, for example, at machines designed the image transfer cylinders accordingly. Even for such Image or substrate-transferring elements can be created and then calibrated Include all calibration tables in the calculation of the positions of the imaging stations. Longer-term fluctuations, the non-repeatable positions of a movement cycle are assignable through continuous renewal of the calibration tables considered. The calibration tables are corrected before each print job however, it is also possible to correct them continuously during printing. In terms of The device can store such calibration tables in corresponding files for the Control of the setting facilities are available. Such files are initially available as machine-specific nominal values and are used by setting devices even before the start of printing as correction values for the positions of the image generation taken into account on the image cylinders. Such correction values can also be used are taken into account for the positions on the image transfer cylinders, the latter correction values also via a correction of the image generation be implemented on the image cylinders to achieve register accuracy. After that printing takes place, expediently before carrying out the print job First register marks are printed and their position is measured to determine the result Correction values for determining the positions of the image generation consider. After that, you can also edit a print job Register marks can also be printed to record changes and more To be able to make corrections.

Boundary conditions that influence the register should be as early as possible by correcting the position values. For good print quality and the avoidance of waste is therefore desirable Include changes as early as possible in the calculation of the position values. For this reason, it is proposed that longer-term and not through their Repetition of a repeatable position of an image- or substrate-bearing Elements assignable errors of the determined position values by acquisition and Inclusion of their influencing factors in the correction for register control be taken into account. This recording and inclusion of the influencing variables The correction is expediently based on stored empirical values. To For this purpose, the setting devices are designed in such a way that they start before printing Take into account correction values for the determination of the positions, the recordable Influencing variables can be assigned and as at least one selectable file with empirical values be available. The selection of such a file can be done via a Input device done, so be activated by manual input, or it it is also possible that the selection by an adjustment device based on at least a measurement of at least one influencing variable takes place, i.e. the inclusion a file is activated for correction by measuring the influencing variable. Farther can be measured an influencing variable with regard to its effect on the register and a correction of the image generation takes place according to these deviations.

There are numerous such influencing variables, those with print jobs or environmental influences that are known or that are measurable. An example of this is the temperature at certain points on the press. To take this into account it is proposed that at least one temperature sensor in the printing press is arranged and the measured temperatures as the basis for a correction be made. Mechanical stresses on certain machine parts of the Printing presses can have an influence on the register accuracy. Therefore it is suggested that this influencing variable by the arrangement of at least one voltage sensor is recorded and that the measured values are the basis for a correction be made.

Another influencing variable is the type of paper, in this case the empirical values for the respective paper type and is loaded with a new paper type accessed the corresponding file. Also the toner profile of the one to be printed Image is influential, and consideration can be given to the fact that the Color printing machine equipped with a device for measuring a toner profile or is measured beforehand and entered into the controller. Then there are expediently experience values for different toner profiles.

As there is a displacement of a substrate on the substrate during printing can come, it is possible to capture this and the image generation for Correct compensation for such a shift. Regarding the device it is proposed that a sensor for detecting a displacement of a substrate is provided on the carrier and the setting devices are designed in this way are that the positions of the imaging to compensate for this shift Getting corrected.

Other empirical values can be for different image widths or for different ones Paper widths are available to make the appropriate corrections. It is too possible that empirical values for changes in substrate dimensions after one-sided Images are taken into account that the image size of the reprint of the Image size of the face print corresponds. This can cause changes in substrate dimensions by spreading it out during printing, by applying color or by fixing the colors with fuses. Through experience can also be the after-influence of the previous change Condition are taken into account. Such an aftereffect occurs, for example a change of paper type if the image cylinder is already with the image for the new one Paper type is illustrated, while the previous image is still on the previous one Paper type is printed.

In addition to the corrections mentioned, other ones are also conceivable. So can be provided be that fluctuations in position values related to their repetition cannot be assigned to the angular position of an image cylinder, but regularly recurring occur, recorded in separate calibration tables and for the error-compensating Control of the device for generating the images on the respective Image cylinders are used. Example values can fluctuate Position values that relate to the repetition of the position of the carrier for the Print substrates can be assigned, corrected according to the position of the carrier be, this correction to the corrections of the position values that the position the image cylinder can be assigned, added and for the location of the generation of the partial color images be taken into account on the image cylinders. Of course you can Fluctuations in position values also avoided by eliminating their causes become.

For example, it can be provided that the carrier is periodic Any irregularities that occur are recorded beforehand and included in the calculation or it is also possible that the circumference of the drive roller of the carrier is proportional is dimensioned to the distance between the image transfer points of the color printing units, that the assignment of the angular positions of the drive roller to the image cylinders to repeat. This can be realized in that the scope of the drive roller of the Carrier can be inserted into the distance between the image transfer points of the color printing units. It can be inserted in half or preferably in whole numbers. Such Training is especially useful if the drive roller over the carrier and possibly drives the image cylinder via the image transfer cylinder, since irregularities due to a runout of the drive roller on all color printing units simultaneously act and can no longer influence the register setting. The said Design is also appropriate if the paths of the wearer by means of a Angular position encoder of the drive roller can be detected because of the angular position encoder undetected speed differences of the carrier due to non-roundness the drive role also no longer need to be recorded, since their influence on the above Way is already switched off.

It is often a completely exact determination of the position values on the basis of the detected Data not possible. For example, measurements usually have a certain spread, they may differ across the width of the image, or there may be short-term ones Fluctuations due to vibrations. In such cases it is proposed that the correction to one within a tolerable range of measured path values middle range is set. For example, at different position values an average value must be set across the direction of transport. It is possible that the calculated deviations to calculate the mean value weighted, for example, a quadratic weighting is proposed. Other weightings are of course possible, they are made in the respect that the influence of the deviations on the image quality is at a minimum. The values of the color printing units lying in the middle range are expedient to the value of a reference printing unit in the middle range brought.

Regarding the calculation of the positions of the image cylinders in which the images are generated , it is proposed that the arrival of a printing substrate be detected and then the Positions for the respective start of the imaging of the image cylinders as positions, e.g. B. determined as the way of the carrier from a detection point for printing substrates become. These calculations are first based on the previously determined and entered Values are made, with subsequent corrections made by at least a device based on the detection of the positions during printing necessary corrections of the positions are determined and these are sent to the adjustment devices submitted for implementation.

Since an analysis of the determined values in this way has already been proposed can be made that the position differences for the beginning of the picture from the Positional differences for the other areas into which the image areas are divided, are separated, it is proposed with regard to the device for register setting, that at least one device for determining the corrections for the beginning of the picture with the sensor for detecting the positions of the carrier and with the sensor for detecting the register marks is connected. In this way, the facility receives for investigation the corrections the data on the deviations of the positions of the register marks from the calculated positions and can thus calculate the corrections and cause.

It is also proposed that a device for determining the corrections for the areas of the partial color images into which the image areas are divided with the Sensor for detecting the positions of the carrier and with the sensor for detecting the Register marks is connected. This way you can also apply to the areas of Partial color images into which the image areas are divided, the differences of the precalculated positions for the positions recorded by the register marks and the corrections are calculated.

The start signal for the beginning of the picture is given with the start of the other areas the picture areas are linked by a device for emitting start signals for the beginning of the picture, at the same time start signals to allocation devices of the areas into which the image area is divided, this device with and the sensor for detecting the positions of the image cylinders is connected Positions the areas into which the image area is divided.

To allow enough time to calculate what is required for accurate register setting Having positions available also suggests that a Sensor for detecting a printing substrate that is fed to the printing press arranged the way of the printing substrates to the printing press and with the setting devices is connected, the calculation of the mutual association of the Positions of the image formation sites is started when a print substrate is detected. Because this sensor on the path of the printing substrates to the printing machine, their leading edge can not detect precisely enough, it is further proposed that a sensor arranged on the carrier for accurate detection of the leading edges of printing substrates and connected to means that compute the paths that the print substrate from this sensor to the positions at the beginning of the respective imaging covered, in order to then get the start of the imaging in the correct position. Of course, however, a sensor arranged on the carrier can also do both Take over functions if there is a sufficient distance available.

The device for register setting can of course be designed such that it can carry out all of the aforementioned procedures and vice versa.

The multi-color printing machine proposed according to the invention can also do all of the device features described above and can be configured in this way be that it can work according to all the above-described procedural features.

Fig. 1

eine schematische Darstellung der erfindungsgemäßen Funktion einer Mehrfarbendruckmaschine,

Fig. 2

den prinzipiellen Aufbau einer Registereinstellungsvorrichtung der Mehrfarbendruckmaschine,

Fig. 3a

Registerabweichungen bei einer Maschine, die aufgrund einer Zeitmessung eingestellt wurde,

Fig. 3b

Registerabweichungen bei einer Maschine, die nach dem erfindungsgemäßen Prinzip eingestellt wurde,

Fig. 4

eine schematische Darstellung einer Mehrfarbendruckmaschine mit vier Farbdruckwerken,

Fig. 5

eine Registermarke für eine Positionsmessung,

Fig. 6.

eine Prinzipskizze für eine Registermarkenerfassung und

Fig. 7

ein Beispiel einer zeitunabhängigen Positionszuordnung.

The invention is explained below with reference to an embodiment shown in the drawing. Show it

Fig. 1

1 shows a schematic representation of the function of a multicolor printing machine according to the invention,

Fig. 2

the basic structure of a register setting device of the multicolor printing machine,

Fig. 3a

Register deviations on a machine that was set due to a time measurement

Fig. 3b

Register deviations in a machine that was set according to the principle according to the invention,

Fig. 4

1 shows a schematic representation of a multicolor printing machine with four color printing units,

Fig. 5

a register mark for a position measurement,

Fig. 6.

a schematic diagram for register mark registration and

Fig. 7

an example of a time-independent position assignment.

1 shows a schematic illustration of the function of a multi-color printing machine 1 according to the invention. Multi-color printing machines 1 generally have four color printing units 6, 6 ', 6 ", 6"'', as shown in FIG. 4. In the illustration of FIG. 1, only two color printing units 6 and 6 'have been drawn in, since this is sufficient for the explanation of the function according to the invention. The illustration must be supplemented mentally in such a way that four or sometimes more color printing units 6, 6', 6 ", 6 ''' register correspondence must be brought in the manner described.

Each of the illustrated color printing units 6, 6 ', ... has an image cylinder 2, 2', ..., which is assigned a device 3, 3 ', ... for generating images. It acts it is usually digital imaging, in the form of electrostatic latent images or by direct or other digital image generation, such as for example by ink jet. Multi-color printing machines 1 can be designed in this way be that the transfer of the images from the image cylinders 2, 2 ', ... immediately on Printing substrates 15 takes place. The multicolor printing machine 1 shown, however, has additionally via image transfer cylinders 13, 13 ', ..., the images from the image cylinders 2, 2 ', ... at image transfer points 53, 53', ... on the image transfer cylinders 13, 13 ', ... are transmitted. Of the image transfer cylinders 13, 13 ', ... the images are then finally transferred to the printing substrates 15 at image transfer points 5, 5 ', 5' ', 5' ''.

The printing substrates 15 are transported by a carrier 4 in the direction of the arrow 33. They pass through the image transmission points 5, 5 ', 5 ", 5"' 'one after the other each image transfer point 5, 5 ', 5 ", 5" "of a color printing unit 6, 6', 6", 6 "" becomes one Partial color image 7, 7 ', ... transferred to the printing substrate 15. That through register settings Problem to be solved is that the partial color images 7, 7 ', ... extremely have to be printed exactly on top of each other in order to achieve high print quality. At electrostatic or similar digital printing processes will print the images on the Image cylinders 2, 2 ', ... by means of devices 3, 3', ... new for each individual print generated, transmitted and then removed by a device 61, 61 ', ... again. A such device 61, 61 ', ... is shown in FIGS. 2 and 4.

For the sake of clarity, not all components of the machine have been included drawn in all figures, however, the representations of FIGS. 1, 2 and 4 set Embodiment and are to achieve completeness of a Put machine representation together.

Since the image cylinders 2, 2 ', ... at freely selectable image generation points 11, 11', ... can be illustrated, a register setting is made on printing presses digital printing process in that the image generation points 11, 11 ', ... at the individual color printing units 6, 6 ', 6 ", 6' '' can be selected such that at Transfer of the images on the printing substrates 15 a register accuracy is achieved. According to the prior art, times have been recorded for this purpose, which are a printing substrate needed until it reaches the image transfer points. These times were with the times in which an image from its creation to Transfer to the print substrate required. So there was an acquisition Printing substrate and it was then the time of imaging for each color printing unit calculated so that it achieves the registration of all part-color images is.

The invention now provides for achieving register matching of the partial color images 7, 7 ', ... that the positions of the generation 11, 11', ... of the partial color images 7, 7 ', ... to each other and to the positions 25, 25', ... of a printing substrate 15 in Be matched. All positions 11, 11 ', ..., 8, 8', ..., 9, 9 ', ..., 12, 12', ..., 14, 14 ', ..., 22, 22', ..., 25, 25 ', ... as paths or as Defined angular positions and for calculating the positions of generation 11, 11 ', ... of the partial color images 7, 7', ... are used.

For example, it is possible that the paths 8, 8 ', ..., 9, 9', ... of the partial color images 7, 7 ', ... from the imaging stations 11, 11', ... of the devices 3, 3 ', ... to Generation of images up to the image transfer points 5, 5 ', 5 ", 5' '' with the Because of 12, 12 ', ..., 14, 14', ..., 22, 22 ', ... of a printing substrate 15 on the carrier 4 in Be matched. Routes 12, 12 ', ..., 14, 14', ..., 22, 22 ', ... the printing substrate 15 with the carrier 4 from a detection point 23 to the Image transfer points 5, 5 ', 5 ", 5' '' of the printing units 6, 6 ', 6", 6' '' back.

Such an assignment can be made in a corresponding manner using the angular positions 8, 8 ', ..., the image cylinder and the angular positions 9, 9', ..., the Image transfer cylinders 13, 13 ', ... take place. Paths 12, 12 ', ..., 14, 14', ... of the carrier 4 can be the angular positions 12, 12 ', ..., 14, 14', ... of the drive roller 52nd of the carrier 4 detected and used for the settings. To the above and characterize other types of position determinations is as follows from positions 11, 11 ', ..., 8,8', ..., 9,9 ', ..., 12, 12', ..., 14, 14 ', ..., 22, 22 ', ..., 25, 25 ', ... spoken.

In order to achieve register accuracy, on the one hand the beginning of the image 10 of the partial color images 7, 7 ', ... are brought into agreement, but on the other hand also defined areas 10', 10 ", ..., 10 ^{n of} the partial color images 7, 7 ',. The latter serves to maintain the register accuracy achieved at the beginning of the image 10 over the entire printed image.

The position assignment according to the invention begins with a sensor 23 as the detection point 23 serves for the front edge 24 of a printing substrate 15. However, it is possible the calculation process for the assignment of the partial color images 7, 7 ', ... the individual color printing units 6, 6 ', 6 ", 6' '' to advance by a sensor 44 for Detection of a printing substrate 15 is already arranged in front of the carrier 4 Printing substrates 15, which are fed to the printing press 1, are already on their way to detect the printing press 1 and the calculation process for the assignment of To set partial color images 7, 7 ', ... in motion.

The device for register setting calculates the starting point 23 Positions 25, 25 ', ... for example as paths 22, 22', ..., which the printing substrate 15 on the carrier 4 must travel. These positions 25, 25 ', ... are defined in that when they are reached by a printing substrate 15, the imaging of the image cylinders 2, 2 ', ... starts. Positions 25 and 25 'are, so to speak, the positions of equality the leading edge 24 of a printing substrate 15 with the leading edge 10 of the partial color images 7, 7 ', ... up to the image transmission points 5, 5', 5 "and 5 '' '- or the Angular equality expressed in the above. Angles. Needless to say normally, as shown in FIG. 4, at least 4 color printing units 6, 6 ', 6 ″, 6 ″ ″ are brought into this positional correspondence is a simplification.

If positions 25, 25 ', ... of the start of the imaging are now reached, the Start the image 10 the same distance as the front edge 24 of the printing substrate 15. However, it has now been ignored that the print substrate may be has a pressure-free edge, which of course is then included in the calculation ought to. From positions 25, 25 ', ... a printing substrate 15 places the paths or angles 14, 14 ', ... (e.g. the drive roller 52) back, the partial color images 7, 7', ... on the image cylinders 2, 2 ', ... the paths or angles 8, 8', ... back. Then she finds Image transfer 53, 53 ', ... to the image transfer cylinders 13, 13', ... instead. The others Paths or angles 9, 9 ', ... of the partial color images 7, 7', ... on the image transfer cylinders 13, 13 ', ... then correspond to the paths or angles 12, 12', ... of the printing substrate 15 on the carrier 4. In this way, upon arrival of the Printing substrate 15 at the respective image transfer points 5, 5 ', 5 ", 5" "each corresponding partial color image 7, 7 'not "just in time" but identical in position "delivered". As a result, the printing substrate receives 33 in its transport direction Color printing unit 6, the first partial color image 7 and then on the second printing unit 6 ' second partial color image 7 'etc. In FIG. 1, therefore, the right printing substrate 15 still bears no partial color image, the middle printing substrate 15 the partial color image 7 of the color printing unit 6 and the left printing substrate 15 both partial color images 7 and 7 '. The pressure will then on further color printing units 6 "and 6 '' 'and possibly also by special colors completed. The transport of the printing substrates 15 takes place by means of the Carrier 4 instead, which is designed as a belt running on rollers 52 and 52 '. A The roller is the drive roller 52 and the other roller is a guide roller 52 '. For transmission of the partial color images 7, 7 ', ... on the printing substrates 15 are at the image transfer points 5, 5 ', 5 ", 5" "attached to the impression cylinder 20. These serve the Transfer of electrically charged color particles in printing processes using electrostatic latent images on the printing substrates 15. They are not in FIGS. 1 and 2 is shown, but its location can be seen in FIG. 4.

In Fig. 1 are the directions of rotation 16, 16 ', ... the image cylinder 2, 2', ... and the directions of rotation 60, 60 ', ... the image transfer cylinder 13, 13', ... drawn. The direction of conveyance of the carrier 4 results from the arrow 33.

2 shows the basic structure of a register setting device for performing the setting according to the invention of positions 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14',. .., 22, 22 ', ..., 25, 25', .... In order to be able to assign positions to one another, it is first necessary to record all the elements that assume positions relevant to the image or substrate transport. This is initially the carrier 4 for the printing substrates 15. Whose positions can be determined by a sensor 27, which as. Angle position transmitter is designed to be detected. Alternatively, however, a sensor 32 can also be arranged on the carrier 4, which detects path markings of the carrier 4. Detection of register marks 17, 17 ′, 17 ″, 17 ″ ″ by a sensor 29 can also be used for position detection. In the exemplary embodiment shown, a sensor designed as an angular position transmitter is used to detect the positions of the image cylinders 2, 2 ′, 26, 26 ', ... and for detecting the position of the image transmission cylinders 13, 13', ... sensors 28, 28 ', also in the form of angular position sensors. However, the cylinders 2, 2', ..., 13, 13 ', ... sensors 26, 26', ... which detect the path by way of markings. This is indicated in Fig. 4 by the arrangement of such sensors 26, 26 ', ....

Upstream of the carrier 4 is a conveyor belt 45 for feeding printing substrates 15 to the printing press 1. If a printing substrate 15 passes the sensor 44, the assignment of positions 8, 8 ', ..., 9, 9', ... is calculated. , 12, 12 ', ..., 14, 14',, 22, 22 ', ..., 25, 25, ... started. If the front edge 24 of the printing substrate 15 then hits the sensor 23, the calculations are ready and devices 46, 46 ', ... are started which record the travel of the paths 22 and 22' and then the start signals 48 and Give 48 'for the image starts 10 and start signals 49 and 49' for the areas 10 ', 10', ..., 10 ^{n of} the partial color images 7, 7 '. In order to detect the paths 22, 22 ', ... or the reaching of the positions 25, 25', ... in order to be able to give the start signals 48, 48 ', ..., 49, 49', ... , The devices 46, 46 ', ... are connected to all position-sensing sensors. These are the sensors 26, 26 ', ... for detecting the positions of the image cylinders 2, 2', ..., the sensor 27 for detecting the positions of the carrier 4 and the sensors 28, 28 ', ... for detecting of the positions of the image transfer cylinders 13, 13 ', .... Furthermore, the devices 46, 46', ... for calculating the positions 25, 25 ', ... are connected to setting devices 30, 30', ... which calculate positions 12, 12 ', ... and 14, 14', ... for the beginning of the picture 10. The start signals 48, 48 ', ... for the image starts 10 and the start signals 49, 49', ... for the areas 10 ', 10 ", 10''', ..., 10 ^{n of} the partial color images 7, 7 ', ..., into which the image area is divided, are given when the front edge 24, or the future image start of the printing substrate 15, the positions 25, 25', ... of the start of the imaging of the image cylinders 2, 2 ',. .. In this regard, reference is made to FIG.

Since the start signals 49, 49 ', ... for the areas 10', 10 ", ..., 10 ^{n must} be assigned exactly to the positions of the image cylinders 2, 2 ', ..., there is a connection 50, 50' , ... of the devices 47, 47 ', ... to the sensors 26, 26', ... for detecting the positions of the image cylinders 2, 2 ', .... The deformations 50, 51', ... of the devices 46, 46 ', ... to the devices 47, 47', ... serve to ensure that the areas 10 ', 10'', ..., 10 ^{n are} started simultaneously with the picture starts 10 Devices 47, 47 ', ... serve to assign the areas 10', 10 ", ..., 10 ^{n of} the partial color images 7, 7 ', ... to the positions of the image cylinders 2, 2', ....

For the calculation of positions 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25 ', ... of the defined areas 10, 10', 10 ", ..., 10 ⁿ serve setting devices 30, 30 ', ..., 31, 31', .... The setting devices 30 serve , 30 ', ... for the calculations of the paths 8, 8', ..., 9, 9 ', ... of the image beginnings 10 and the setting devices 31, 31', ... for the calculations of the paths 8, 8 ', ..., 9, 9', ... of the areas 10 ', 10 ", ..., 10 ^{n of} the partial color images 7, 7', .... The setting devices 30, 30 ', ... , 31, 31 ', ... are designed and networked in such a way that they receive all the information required for the calculation of the positions and can thus give such commands to the devices 3, 3', ... for generating the images that the Imaging stations 11, 11 ', ... with regard to their respective position, the coordination of positions 8, 8', ..., 9, 9 ', ... with positions 12, 12', ..., 14, 14 ', ... correspond. This adjustment takes place both before the printing of a printing substrate 15 by machine-specific nominal values with a correction by printing and the detection of register marks 17, 17 ', 17'',17''', as well as during the printing of printing substrates 15, also here Register marks 17, 17 ', 17'',17''' can be detected. In this way, it is possible to correct the default settings between each individual illustration. After the transfer of the partial color images 7, 7 ', ... from the image cylinders 2, 2', ... to the image transfer cylinders 13, 13 ', ... the image residues are removed by means of devices 61, 61', ... again the image cylinders 2, 2 ', ... removed. Devices 62, 62 ', ... of this type are also assigned to the image transfer cylinders 13, 13', ... for removing the image residues.

A first setting of the positions for the image production 11, 11 ', ... is thereby made that the setting devices 30, 30 ', ..., 31, 31', ... all relevant data 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25 ', ... receive. In order to make this data available, it is not necessary to have a substrate 15 to print, there is even no printing required at all, since the capture and assignment of the positions, for example the paths or angles 8, 8 ', ..., 9, 9', ... and 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25', ... is sufficient.

First of all, the setting devices 30, 30 ', ... have machine-specific nominal values 34, 34', ... of positions 8, 8 ', ..., 9, 9', ... of the beginning of the picture 10. The setting devices 31, 31 ', ... also have machine-specific nominal values 35, 35', ... with regard to positions 8, 8 ', ..., 9, 9', ... of the areas 10 ', 10 ",. .., 10 ^{n of} the partial color images 7, 7 ', .... These machine-specific nominal values 35, 35', ... are constantly corrected in order to achieve high accuracy, for the first time before a printing process is carried out Setting devices 30, 30 ', ..., 31, 31'; ... correction values 36, 36 ', ... via the positions 8, 8', ... on the image cylinders 2, 2 ', ... from the sensors 26, 26 ', ... for detecting the positions of the image cylinders 2, 2', ... Furthermore, the setting devices 30, 30 ', ..., 31, 31', ... receive correction values 37, 37 ', ... for positions 9, 9', ... the image transfer cylinder 13, 13 ', .... These correction values 37, 37', ... come from the sensors 28, 28 ', ... for detecting the angular positions or the paths of the surfaces of the image transfer cylinders 13, 13', .. .. The distances 64 between the color printing units 6, 6 ', 6 ", 6'" and the position of the sensor 23 can also be entered as machine-specific nominal values. Corrections of the same may be necessary due to various influences, for example due to measured temperatures or due to mechanical stresses in the printing press 1.

However, since other circumstances influence the calculation of the routes, the Setting devices 30, 30 ', ..., 31, 31', ... with further correction values 38, 38 ', ... supplied. These correction values 38, 38 ', ... can be empirical values for Types of paper, for toner application, image widths, paper widths, the fact that in Backprint is printed, temperature, tensions in machine parts, the displacement a printing substrate 15 on the carrier 4 and so on. In this regard, the referenced above description. These correction values 38, 38 ', ... are empirical values ready. You can send an input device, not shown, to the Setting devices 30, 30 ', ..., 31, 31', ... are given or it is possible they based on a measurement, for example a temperature or a voltage Setting devices 30, 30 ', ..., 31, 31', ... to be transmitted.

Both the machine-specific nominal values 34, 34 ', ..., 35, 35', ... and the Correction values 38, 38 ', ... can be available as calibration tables. Are there the machine-specific nominal values 34, 34 ', ..., 35, 35', ... the angular positions, preferably the image cylinder 2, 2 ', ... assigned. Others already described above Assignments are possible, however, then several calibration tables have to be assigned to the Calculation of the image generation points 11, 11 ', ... on the image cylinders 2, 2', ... included become. Calibration tables for other values are then different, for example Assigned temperatures or different voltages. You can also these calibration tables can be assigned to angular positions of the image cylinders 2, 2 ', ... As Experience values stored correction values 38, 38 ', ... are as files 39, 39', ... retrievable filed.

On the basis of a trial run or during printing, it is possible to do more Consider corrections as feedback. These further corrections can be made For example, determine that register marks 17, 17 ', 17 ", 17' '' by the Color printing units 6, 6 ', 6 ", 6"' 'printed on the carrier 4 and by a sensor 29 for Detection of register marks 17, 17 ', 17' ', 17' '' can be detected. With these register marks 17, 17 ', 17 ", 17' '' it is essential that they, too, by their positions Carriers 4 are assigned and for example via regularly spaced elements 18 feature. A series of spaced-apart elements 18 can be printed in which successively one element 18 is printed by a color printing unit 6, 6 ', 6 ", 6"' ' becomes. However, it is also possible that color printing units 6, 6 ', 6 ", 6' '' one after the other print multiple spaced elements 18. If the register marks 17, 17 ', 17 ", 17 '' 'are not printed as continuous tapes, so the distances between the individual register mark groups can be recorded. The register marks 17, 17 ', 17 ", 17 '' 'can be printed directly on the carrier 4, as long as no printing substrates 15 are on it, they can be on those not covered by printing substrates 15 Places of the carrier 4 are printed, on test sheets or on non-image areas of the Printing substrates 15, e.g. B. on the edges.

The measured values of the sensor 29 are transmitted to devices 40, 40 ', ... for determining the corrections 42, 42', ... for the image beginnings 10, these devices 40, 40 ', ... the corrections 42, 42' , ... to the setting devices 30, 30 ', ... In a corresponding manner, the values from the sensor 29 for detecting the register marks 17, 17 ', 17 ", 17"' on devices 41, 41 ', ... for determining the corrections 43, 43', ... for areas 10 ', 10'', ..., 10 ^{n of} the partial color images 7, 7', ... These devices 41, 41 ', ... also give the corrections 43, 43', ... to the setting devices 31 , 31 ', ..., so that the positions for the defined areas 10', 10 ", ..., 10 ⁿ are corrected based on this feedback.

Of course, the illustration in FIG. 2 is only for the sake of clarity limited to two printing units 6, 6 ', in fact there are usually four Printing units 6, 6 ', 6 ", 6' '' available. Correspondingly longer must of course then the carrier 4 can be designed. The conveyor belt 45 for feeding a Printing substrate 15 to printing machine 1 is shown shortened, path 21 one Print substrate from sensor 44 to sensor 23 is significantly longer to during The calculation process for positions 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14 ', ..., 22, 22', ..., 25, 25 ', .... Usually four printing units 6, 6 ', 6 ", 6' '' are present, are also those described above, those shown Elements 6 and 6 'associated with printing units are present four times. Or it is a Calculator provided that contains all elements.

3a shows register deviations in a machine that was set on the basis of a time measurement. The deviations 55 from the nominal value 54 of a register are plotted when measuring points are detected along a path 56 in the transport direction 33. As can be seen, the measuring points 57 show oscillation-like deviations from the nominal value 54, which is shown as the zero line.

3b shows register deviations in a printing press 1 which was set according to the principle according to the invention. Due to the register setting made there according to positions, a setting with significantly smaller deviations is achieved. Here, too, the deviations 55 from the nominal value 54 are plotted against the path 56 of measuring points along the transport direction 33. The vibration-like deviations as in the time control do not occur here, even if the cause, for example the poles of the electric motor of a drive machine, is still present. The reason is that such vibrations are based on the assignment of positions to times and therefore cannot influence control.

4 shows a schematic illustration of a multicolor printing machine 1 with four color printing units, 6, 6 ', 6 ", 6"''. This is the normal design of a multicolor printing machine 1, but there may also be more printing units. The reference numerals are identical with those already described, all components of the machine shown having already been discussed in the explanations for FIGS. 1 and 2. The printing machine shown as an exemplary embodiment has the four color printing units 6, 6 ', 6 ", 6"", where each the elements acc. 1 and 2 are assigned.

In addition, here is the distance 64 between two color printing units 6, 6 'or 6', 6 "or 6", 6 '' '. Such a distance 64 is expedient dimensioned such that a runout of the drive roller 52 on all printing units 6, 6 ', 6 '', 6 '' 'comes into play simultaneously. Through this even influence avoided an impact of this error. For this purpose, the scope of the Drive roller 52 correspond to the distance 64, it can also be a fraction of this Distance 64 or a whole multiple. From the machine dimensioning is likely to be an identity of the extent with the distance 64 or a whole multiple in Question come.

5 shows register marks 17, 17 ', 17 ", 17"''which are particularly useful for position detection. These register marks 17, 17', 17 ", 17""have spaced elements 18. They represent, so to speak, a scale that specifies positions defined as a path or, for example, as an angular interval and thus makes the position of the partial color images 7, 7 ', 7 ", 7"''relative to one another and to the printing substrate 15 detectable.

Fig. 6 shows a schematic diagram for register mark detection. From the color printing units 6, 6 ', 6 ", 6' '' - only one is shown symbolically - becomes one at a time Register mark 17, 17 ', 17 ", 17"' printed. These are by a sensor 29 for Detection of register marks 17, 17 ', 17 ", 17"' with respect to their position a reference line 66 is defined in the register control, which is a substrate 15 on the Carrier 4 is assigned. Reaches this reference line 66 with the substrate 15 certain position in front of the register sensor 29, this is activated by the distances of the register marks 17, 17 ', 17 ", 17" "to this reference line 66 can the respective distance 65 of the reference line 66 to the detection point 23 for the Front edge 24 of a printing substrate 15 and the determined distances of the Register marks 17, 17 ', 17 ", 17"' 'of this reference line 66 are detected, for example, as paths become. However, it is preferably proposed that they be angular positions Assign drive roller 52 of the carrier 4, these angular positions by a trained as an angular position sensor 27 can be detected. The dates go in Above shown on devices 40, 40 ', ..., 41, 41', ... for determining Corrections for imaging 11, 11 ', ....

7 shows an example of a time-independent position assignment. In the illustration, the angular positions 68 of the image cylinder and the image transfer cylinder are plotted against the positions 69 of the carrier 4 for printing substrates. However, only the angular position 70 of an image cylinder 2 and the angular position 71 of an image transfer cylinder 13 were shown. The angular positions of the further image cylinders 2 'etc. would have to be drawn in by means of curves which are shifted with respect to curves 70 and 71. This has been omitted for the sake of clarity. The illustration shows that an angular position of an image cylinder 2 and an angular position of an image transfer cylinder 13 belong to each position 69 of the carrier 4 for printing substrates 15. In this way, a time-independent position assignment is carried out in order to start certain processes in the correct positions.

The first preparation for printing is initiated in position 72, this is the position of the detection of a printing substrate 15 by a sensor 44, which registers the feeding of the printing substrate 15 to the multicolor printing machine 1. From this point in time, the image generation 11, 11 ', ... of the partial color images 7, 7', ... is calculated, the relative assignments being calculated. In a position 73, the printing substrate 15 is detected by the sensor 23 and thus its exact position on the carrier 4 is determined, as a result of which an exact assignment of the image generations 11, 11 ', ... of the partial color images 7, 7', ... to the carrier 4 is possible. The print substrate travels the path 21 between the position 72 and the position 73. With the detection of the printing substrate in the position 73, the path or the angular position of the drive roller 52 is calculated in order to determine the position 25. This is the position of the carrier 4 at which the start of image generation 11 of a partial color image 7 on the image cylinder 2 begins. After a path 14 of the carrier 4 in position 74, the transfer of the partial color image 7 from the image cylinder 2 to the image transfer cylinder 13 takes place. After a further path 12 of the carrier 4, the carrier 4 reaches the position 75 for the start of the transfer of the partial color image 7 from the image transfer cylinder 13 on a substrate 15. The paths 14 and 12 of the carrier 4 are assigned angular positions 8 of the image cylinder and angular positions 9 of the image transfer cylinder 13. It is essential that the image generation and thus the transfers of the partial color images 7, 7 ', ... are determined by these position assignments. The position assignments of the defined areas 10, 10 ', 10 ", ..., 10 ^{n of} all partial color images 7, 7', ... are carried out in a manner corresponding to the beginning of the image 10 of the partial color image 7.

However, the position assignments according to the invention do not mean that the Path lengths on the cylinders 2, 2 ', ..., 13, 13', ... and the carrier 4 are the same since it in the transmissions of the partial color images 7, 7 ', ..., for example from one Image cylinder 2, 2 ', ..., to an image transfer cylinder 13, 13', ... to one Overdrive is coming. This means that the rubber properties of the cylinder jackets there is no rolling along the same path, but the surface of the Image transfer cylinder 13, 13 ', ... moves faster, as in the Rolling on ideal cylinders would be the case. There is also a slip that also leads to the fact that an exact path length assignment is not possible. Such Apparitions which cause differences in the path lengths must occur in the Assignment of positions, for example angular positions 68 of the image cylinders 2, 2 ', ... and the image transfer cylinder 13, 13', ... to positions 69 of the carrier 4 are taken into account in order to find the correct position 25 for the image generations 11, 11 ', ... to determine. If paths are related to each other, so must Corrections for path differences, for example through overdrive, slip and similar phenomena are included.

It is useful if the basic assignments as machine-specific parameters entered, which are then continuously checked and corrected before and during printing become. These corrections can overdrive, slip and similar changes can be compensated for by different toner application or many other causes occur. These values vary across the width of the print substrate, so it is useful if these assignments are based on the mean values.

The illustrated embodiment serves only to explain the invention and at the same time represents an advantageous embodiment The method and the device of the invention can of course be varied Be realized in one machine. Not just alternatives regarding the Position registration, which were mentioned, are possible, also the concrete registration and Processing of the data can of course be done in different ways become.

Reference list

1

Multicolour printing machine

2, 2 ', ...

Image cylinder

3, 3 ', ...

Devices for generating images, for example of electrostatic latent images

4th

Carrier for printing substrates

5, 5 ', 5' ', 5' ''

Image transmission points

6, 6 ', 6' ', 6' ''

Color printing units

7, 7 ', ...

Part color images

8, 8 ', ...

Positions (e.g. as paths or angular positions) of defined areas the part color images on the image cylinders

9, 9 ', ...

Positions (e.g. as paths or angular positions) of defined areas of the partial color images on the image transfer cylinders

10, 10 ', 10 ", ..., 10 ⁿ

defined areas of the partial color images

10th

Beginning of the picture / beginning of the illustration

10 ', 10 ", ..., 10 ⁿ

Areas of the partial color images into which the image area is divided

11, 11 ', ...

Imaging

12, 12 ', ...

Positions (e.g. as paths or angular positions of the drive roller) the wearer according to positions 9, 9 ', ...

13, 13 ', ...

Image transfer cylinder

14, 14 ', ...

Positions (e.g. as paths or angular positions of the drive roller) the wearer according to positions 8, 8 ', ...

15

Printing substrates

16, 16 ', ...

Direction of rotation of the image cylinder

17, 17 ', 17 '', 17 '' '

Register marks (different color printing units)

18th

regularly spaced elements of the register marks

19th

Distances of the regularly spaced elements

20th

Impression cylinder

21

Path of the printing substrate during which positions 12, 12 ', ..., 14, 14 ', ..., 22, 22', ... can be calculated

22, 22 ', ...

Positions (paths or angular positions of the drive roller) of the carrier from a detection point for a substrate to the beginning of the Illustration

23

Sensor: detection point for printing substrates (leading edge)

24th

Leading edge of a printing substrate

25, 25 ', ...

Positions of the carrier at which the start of an illustration or the Imaging with one of the areas of the partial color images on an image cylinder takes place.

26, 26 ', ...

Sensors for detecting the positions of the image cylinders (e.g. angular position transmitter)

27

Sensor for detecting the carrier (e.g. angular position transmitter)

28, 28 ', ...

Sensors for detecting the positions of the image transfer cylinders (e.g. angular position transmitter)

29

Sensor for register mark registration

30, 30 ', ...

Setting devices for the beginning of the picture

31, 31 ', ...

Setting devices for defined areas of the partial color images

32

Sensor for the detection of path markings on the carrier

33

Arrow: transport direction of the printing substrates

34, 34 ', ...

machine-specific nominal values of the positions of the image starts

35, 35 ', ...

machine-specific nominal values of the positions of the areas of the partial color images, into which the image area is divided

36, 36 ', ...

Correction values for the positions on the image cylinders

37, 37 ', ...

Correction values for the positions on the image transfer cylinders

38, 38 ', ...

Correction values as empirical values

39, 39 ', ...

file

40, 40 ', ...

Devices for determining the corrections for the beginning of the picture

41, 41 ', ...

Devices for determining the corrections for areas of the partial color images, into which the image area is divided.

42, 42 ', ...

Corrections for the beginning of the picture

43, 43 ', ...

Corrections for areas of the partial color images in which the image area is divided.

44

Sensor for detecting a printing substrate, that of the printing press is fed

45

Conveyor belt for feeding a printing substrate to the printing machine

46, 46 ', ...

Devices for calculating positions 25, 25 ', ..., z. B. in the form of paths 22, 22 ', ... or corresponding angular positions of the Drive role of the carrier

47, 47 ', ...

Means for assigning the areas of the partial color images, in which divides the image area to the positions of the image cylinders

48, 48 ', ...

Start signals for the beginning of the picture

49, 49 ', ...

Start signals for the areas of the partial color images in which the image area is divided

50, 50 ', ...

Connections of sensors 26, 26 ', ... with devices 47, 47', ...

51, 51 ', ...

Connections of devices 46, 46 ', ... and 47, 47', ...

52

Drive roller of the carrier tape (carrier 4)

52 '

Guide role of the carrier tape

53, 53 ', ...

Image transfer points Image cylinder - Image transfer cylinder

54

Setpoint (straight line)

55

Deviations from the target value

56

Path of the measuring points along the transport direction

57

Measuring points with time control

58

Measuring points for position control

59

Direction of rotation of the impression cylinder

60, 60 ', ...

Direction of rotation of the image transfer cylinder

61, 61 ', ...

Means for removing the imaging of the image cylinders

62, 62 ', ...

Means for removing the imaging of the image transfer cylinder

63

Device for removing register marks printed on the carrier

64

Distance between two color printing units

65

current distance of the reference line 66 from the detection point 23

66

Reference line

67, 67 ' 67 ", 67 '' '

Distances from register marks each consisting of an element 18 17, 17 ', 17 ", 17"' of the partial color images 7, 7 ', ... from the reference line 66

68

Angular positions of the image cylinder and the image transfer cylinder

69

Positions of the substrate for printing substrates

70

Angular positions of an image cylinder

71

Angular positions of an image transfer cylinder

72

Position of the detection of a print substrate by the sensor 44

73

Position of the detection of a printing substrate by the sensor 23

74

Position for the start of the transfer of the partial color image 7 from the Image cylinder 2 on the image transfer cylinder 13

75

Position for the start of the transfer of the partial color image 7 from the Image transfer cylinder 2 on a printing substrate 15

Claims (96)

Method for register setting on a multicolor printing machine (1) with color printing units (6, 6 ', 6 ", 6''') assigned to different printing colors, with image cylinders (2, 2 ', ...), devices (3, 3', .. .) for generating images, in particular electrostatic latent images, on the image cylinders (2, 2 ', ...), a support (4) for printing substrates (15) and image transfer points (5, 5', 5 ", 5 ''') for the transfer of the partial color images (7, 7 ', ...) from the color printing units (6, 6', 6 ", 6 ''') to the printing substrates (15), with an assignment of the image generations (11, 11 ', ...) on the image cylinders (2, 2', ...) to the printing substrates (15) in order to achieve a register match of the partial color images (7, 7 ', ...) during printing,
characterized in that a time-independent position assignment of the image generations (11, 11 ', ...) on the image cylinders (2, 2', ...) to the printing substrates (15) of at least one defined area (10, 10 ', 10 " , ..., 10 ⁿ ) of all part-color images (7, 7 ', ...). Method according to claim 1,
characterized in that for the partial color images (7, 7 ', ...) each have at least one defined area (10, 10', 10 '', ..., 10 ⁿ ) on the image cylinders (2, 2 ',. ..) to predetermined positions (25, 25 ', ...) of the carrier (4) are generated. Method according to claim 1,
characterized in that at least one defined area (10, 10 ', 10'', ..., 10 ⁿ ) of the partial color image (7) of a reference color printing unit (6) has at least one defined area (10, 10', 10 "), ..., 10 ⁿ ) of the partial color images (7 ', ...) of the other color printing units (6', 6 ", 6 ''') and that then an assignment to a position (25, 25', .. .) of the carrier (4). Method according to one of claims 1 to 3,
characterized in that the angular positions of the drive roller (52) of the carrier (4) are used for the position assignments (25, 25 ', ...) of the carrier (4). Method according to one of claims 1 to 4,
characterized in that their angular positions (8, 8 ', ...) are used for the position arrangements of the image cylinders (2, 2', ...). Method according to one of claims 1 to 3 or 4,
characterized in that the paths (12, 12 ', ..., 14, 14', ..., 22, 22 ', .. for the position arrangements (25, 25', ...) of the carrier (4) .) The surface of the carrier (4) can be used. Method according to one of claims 1 to 4 or 6,
characterized in that the paths (8, 8 ', ...) of the surfaces of the image cylinders (2, 2', ...) are used for the position arrangements of the image cylinders (2, 2 ', ...). Method according to one of claims 1 to 7,
characterized in that the positions (9, 9 ', ...) of image transfer cylinders (13, 13', ...) are also included in the position assignments. A method according to claim 8,
characterized in that their angular positions (9, 9 ', ...) are used for the position assignments of the image transfer cylinders (13, 13', ...). A method according to claim 8,
characterized in that the paths (9, 9 ', ...) of the surfaces of the image transfer cylinders (13, 13', ...) are used for the position assignments of the image transfer cylinders (13, 13 ', ...). Method according to one of claims 1 to 10,
characterized in that the mutually assigned defined areas of the partial color images (7, 7 ', ...) are the image beginnings (10). Method according to one of claims 1 to 11,
characterized in that the mutually assigned defined areas (10 ', 10'', ..., 10 ⁿ ) areas (10', 10 ", ..., 10 ⁿ ) of the partial color images (7, 7 ', ... ) into which the image areas are divided. Method according to one of claims 1 to 12,
characterized in that the areas (10, 10 ', 10'', ..., 10 ⁿ ) are pixel lines of the partial color images (7, 7', ...). Method according to one of claims 1 to 12,
characterized in that the areas (10 ', 10 ", ..., 10") are each a number of pixel lines of the partial color images (7, 7', ...). The method of claim 14
characterized in that the number of pixel rows results from the assignment to fixed angular intervals of the image cylinders (2, 2 ', ...). Method according to one of claims 1 to 15,
characterized in that the lateral position of the areas (10, 10 ', 10'', ..., 10 ⁿ ) is also determined and adjusted. Method according to one of claims 1 to 16,
characterized in that errors relating to the lateral extent of the regions (10, 10 ', 10 ", ..., 10 ⁿ ) are also determined and corrected. Method according to one of claims 1 to 17,
characterized in that the positions (8, 8 ', ..., 9, 9, ..., 12, 12', ..., 14, 14 ', ..., 25, 25', ... ) are determined and coordinated before processing a print job. Method according to one of claims 1 to 18,
characterized in that the positions (8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 '... , 25, 25 ', ...) are constantly recorded and coordinated with each other when processing a print job. Method according to one of claims 1 to 19,
characterized in that the positions (8, 8 ', ..., 9.9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', .. ., 25, 25 ', ...) can be determined by means of register marks (17, 17'). A method according to claim 20,
characterized in that the register marks (17, 17 ', 17 ", 17''') have elements (18) which are arranged in the transport direction (14) and are spaced apart in a predetermined manner. 22. The method of claim 21,
characterized in that distances (19) of the regularly spaced elements (18) are detected. Method according to one of claims 20 to 22,
characterized in that the register marks (17, 17 ', 17 ", 17''') are printed on the carrier (4) and removed again after the position has been determined. The method of claim 23
characterized in that the register marks (17, 17 ', 17'',17''') are printed in the space of the carrier (4) which is not covered by printing substrates (15). A method according to claim 24,
characterized in that the register marks (17, 17 ', 17'',17''') are printed on paper. Method according to one of claims 1 to 25,
characterized in that by analyzing the determined positions (8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25', ...) the deviations of the actual values from the target values for the image beginnings (10) from the deviations of the actual values for the other areas (10 ', 10'', ..., 10 ⁿ ) into which the image areas are divided. Method according to one of claims 1 to 26,
characterized in that after determining the positions (8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 25, 25 ' , ...) for the image starts (10) on the individual image cylinders (2, 2 ', ...) these positions for the image generation of the other defined areas (10, 10', ..., 10 ⁿ ) on the individual Image cylinders (2, 2 ', ...) based on the former are determined and used in this order to control or regulate the image production (11, 11', ...). Method according to one of claims 1 to 27,
characterized in that a noise - that is to say fluctuations that occur very briefly - is eliminated from the recorded values in order to avoid control instability for the evaluation. Method according to one of claims 1 to 28,
characterized in that fluctuations in the determined position values, which can be assigned in terms of their magnitude and repetition to a repeatable position of a cylinder (2, 2 ', ..., 13, 13', ...), are separated from longer-term fluctuations. The method of claim 29
characterized in that the fluctuations in the determined position values (8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 25, 25 ' , ...), which can be assigned to a repeatable position of an image cylinder (2, 2 ', ...) with regard to their size and repetition, included in at least one calibration table for this image cylinder (2, 2', ...) and for the error-compensating control of the positions of the image generation (11, 11 ', ...) are used. A method according to claim 30,
characterized in that calibration tables for the beginning of the image (10) of the partial color images (7, 7 ', ...) are created. Method according to claim 30 or 31,
characterized in that calibration tables for the other defined areas (10 ', 10 ", ..., 10 ⁿ ) of the partial color images (7, 7', ...) are created. Method according to one of claims 29 to 32,
characterized in that for at least one further image- or substrate-transmitting element (13, 13 ', ..., 4, 20, 52, 52') its repetitive positions in a movement cycle can be assigned deviations of the positions (8, 8 ',. .., 9, 9 ', ..., 12, 12', ..., 14, 14 ', ..., 25, 25', ...) of the target values and included in the calculation of the positions of the Imaging sites (11, 11 ', ...) are included. A method according to claim 33,
characterized in that at least one calibration table is also created for this at least one element (13, 13 ', ..., 4, 20, 52, 52') and all calibration tables are included in the calculation of the positions of the image generation points (11, 11 ', ...) be included. Method according to one of claims 30 to 34,
characterized in that the longer-term fluctuations of the determined position values are taken into account by renewing the calibration tables. Method according to one of claims 1 to 35,
characterized in that longer-term errors which cannot be assigned by their repetition of a repeatable position of an image- or substrate-transmitting element (2, 2 ', ..., 13, 13', ..., 4, 20, 52, 52 ') determined position values are taken into account by including their causal influencing variables in the correction for register control. A method according to claim 36,
characterized in that the influencing variables are included in the correction on the basis of stored empirical values A method according to claim 37,
characterized in that the inclusion of the influencing variables is activated by a manual input. A method according to claim 37,
characterized in that the inclusion of the influencing variables is activated by measuring the same. Method according to one of claims 1 to 39,
characterized in that the influencing variables are measured with regard to their effects on the register and the image production (11, 11 ', ...) is corrected in accordance with these deviations. A method according to claim 39 or 40,
characterized in that a detection of the temperature at selected points on the printing press (1) forms the basis for a correction. Method according to one of claims 39 to 41,
characterized in that the detection of tensions on selected machine parts of the printing press (1) is the basis for a correction. Method according to one of claims 37 to 42,
characterized in that empirical values for different types of paper are available for a correction when changing the type of paper. Method according to one of claims 37 to 43,
characterized in that empirical values for different toner profiles are available for correction. Method according to one of claims 37 to 44,
characterized in that a displacement of a substrate (15) on the carrier (4) is detected and the positions of the image generations (11, 11 ', ...) are corrected to compensate for this displacement. Method according to one of claims 37 to 45,
characterized in that empirical values for different image widths are available for correction. Method according to one of claims 37 to 46,
characterized in that empirical values for different paper widths are available for the correction. Method according to one of claims 37 to 47
characterized in that empirical values for changes in the substrate dimensions after one-sided printing of a substrate (15) are taken into account so that the image size of the backprint corresponds to the image size of the face print. Method according to one of claims 37 to 48,
characterized in that the after-effect of the state preceding a change is taken into account in the empirical values. Method according to one of claims 1 to 49,
characterized in that fluctuations in the position values, which cannot be assigned to the angular position of an image cylinder (2, 2 ', ...) with regard to their repetition, but occur regularly, are recorded in separate calibration tables and used for the error-compensating control of the devices (3, 3 ', ...) can be used to generate images on the respective image cylinders (2, 2', ...). A method according to claim 50,
characterized in that fluctuations in the position values, which can be assigned to a position of the carrier (4) for the printing substrates (15) with regard to their repetition, are corrected in accordance with the positions of the carrier (4), this correction in addition to the corrections of the position values which the Position of the image cylinder (2, 2 ', ...) can be assigned, are added. Method according to one of claims 50 or 51,
characterized in that fluctuations in the position values are avoided by eliminating their causes. A method according to claim 52,
characterized in that the circumference of the drive roller (52) of the carrier (4) in relation to the distance (64) of the image transfer points (5, 5 ', 5 ", 5''') of the color printing units (6, 6 ', 6'',6''') is dimensioned such that the assignment of the angular positions of the drive roller (52) to the image cylinders (2, 2 ', ...) is repeated. Method according to one of claims 1 to 51,
characterized in that the correction is set to a middle range within a tolerable range of detected position values. The method of claim 54
characterized in that an average value is set at different position values transverse to the transport direction (33). The method of claim 54 or 55,
characterized in that the deviations determined are weighted for calculating the central area. The method of claim 56,
characterized in that a quadratic weighting takes place. Method according to one of claims 54 to 57,
characterized in that the values of the color printing units (6 ', 6 ", 6''') lying in the middle range are brought into agreement with the value of a reference printing unit (6) lying in the middle range. Method according to one of claims 1 to 58,
characterized in that the arrival of a printing substrate (15) is detected and that the positions (25, 25 ') for the respective start of the imaging of the image cylinders (2, 2', ...) as positions (22, 22 ', .. .) of the carrier (4) from the detection point (23) for printing substrates (15) can be determined. Device for register adjustment according to a method according to one of claims 1 to 59 on a multi-color printing press (1) with color printing units (6, 6 ', 6 ", 6''') assigned to different printing colors with image cylinders (2, 2 ', ...) , Devices (3, 3 ', ...) for generating images, in particular electrostatic latent images, on the image cylinders (2, 2', ...), a support (4) for printing substrates (15) and image transfer points ( 5, 5 ', 5'',5''') for the transfer of the partial color images (7, 7 ', ...) from the color printing units (6, 6', 6 ", 6 ''') to printing substrates (15 ), Sensors (23, 26, 26 ', ..., 27, 28, 28', ..., 29) for position detection and at least one setting device (30, 30 ', ..., 31, 31',. ..) for the assignment of the positions of the image generation points (11, 11 ', ...) on the image cylinders (2, 2', ...) to the printing substrates (15) in order to achieve a register match of the partial color images (7, 7 ', ...) when printing,
characterized in that the sensors (23, 26, 26 ', ..., 27, 28, 28', ..., 29) for detecting the positions of elements carrying the image and the substrate (2, 2 ', ... , 4, 13, 13 ', ...) and that at least one setting device (30, 30', ..., 31, 31 ', ...) is designed such that it positions the positions of the image generation (11 , 11 ', ...) on the image cylinders (2, 2', ...) to the printing substrates (15) with respect to at least one defined area (10, 10 ', 10'', ..., 10 ⁿ ) of the Partial color images (7, 7 ', ...) assigned independent of time. An apparatus according to claim 60,
characterized in that the at least one setting device (30, 30 ', ..., 31, 31', ...) is designed in such a way that it generates (11, 11 ', ...) at least one defined area ( 10, 10 ', 10 ", ..., 10 ⁿ ) of all partial color images (7, 7', ...) on the respective image cylinders (2, 2 ', ...) at predetermined positions (25, 25', ...) of the carrier (4). Device according to claim 60 or 61,
characterized in that at least one sensor (26, 26 ', ..., 27, 28, 28', ...) is designed as an angular position transmitter. Device according to claim 60, 61 or 62,
characterized in that at least one setting device (30, 30 ', ..., 31, 31', ...) is designed to assign angular positions. Apparatus according to claim 63,
characterized in that at least one sensor is provided for detecting a concentricity error, and at least one adjusting device (30, 30 ', ..., 31, 31', ...) the positions (8, 8 ', ..., 9 , 9 ', ..., 12, 12', ..., 14, 14 ', ..., 22, 22', ...) determined from angular positions and concentricity errors. Device according to one of claims 60 to 64,
characterized in that at least one sensor (26, 26 ', ..., 27, 32) for detecting routes (8, 8', ..., 9, 9 ', ..., 12, 12',. .., 14, 14 ', ..., 22, 22', ...) is formed. Apparatus according to claim 65,
characterized in that sensors (26, 26 ', ..., 27, 28, 28', ..., 32) are designed for the detection of route markings and the latter are attached to the corresponding surfaces. Device according to one of claims 60 to 66,
characterized in that at least one setting device (30, 30 ', ..., 31, 31', ...) for assigning routes (8, 8 ', ..., 9, 9', ..., 12 , 12 ', ..., 14, 14', ..., 22, 22 ', ...) is formed. Device according to one of claims 60 to 67,
characterized in that at least one sensor (28, 28 ', ...) is provided for detecting the positions of the image transfer cylinders (13, 13', ...) and this of the at least one setting device (30, 30 ', .. ., 31, 31 ', ...) for the calculation of the image generation (11, 11', ...) are transmitted. Device according to one of claims 60 to 68,
characterized in that at least one setting device (30, 30 ', ...) is designed such that it specifies the positions (25, 25', ...) of the carrier (4) at which the start (10) of the The image cylinders (2, 2 ', ...) are imaged. Device according to one of claims 60 to 69,
characterized in that at least one setting device (31, 31 ', ...) is designed such that it specifies the positions (25, 25', ...) of the carrier (4) at which the imaging of the image cylinders (2 , 2 ') with the areas (10', 10 ", ..., 10 ⁿ ) into which the image area is divided. Device according to one of claims 60 to 70,
characterized in that at least one sensor (29) is provided for detecting register marks (17, 17 ', 17'',17'''). Apparatus according to claim 71,
characterized in that the at least one sensor (29) is designed to detect distances (19) from elements (18) of the register marks (17, 17 ', 17 ", 17''') which are spaced apart in a predetermined manner. Device according to one of claims 60 to 72,
characterized in that the setting devices (30, 30 ', ..., 31, 31', ...) with machine-specific nominal values (34, 34 ', ..., 35, 35', ...) of the positions ( 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25', ...) are equipped. Device according to one of claims 60 to 73,
characterized in that the setting devices (30, 30 ', ..., 31, 31', ...) are designed in such a way that they correct values (36, 36 ', ...) for the positions (8, 8 ', ...) of the image generation (11, 11', ...) on the image cylinders (2, 2 ', ...). Device according to one of claims 60 to 74,
characterized in that the setting devices (30, 30 ', ..., 31, 31', ...) are designed in such a way that they correct values (37, 37 ', ...) for the positions (9, 9 ', ...) on the image transfer cylinders (13, 13', ...). Device according to one of claims 60 to 75,
characterized in that the setting devices (30, 30 ', ..., 31, 31', ...) are designed in such a way that they correct values (36, 36 ', ..., 37, 37',. .., 38, 38 ', ...) for the positions (8, 8', ..., 9, 9 ', ..., 12, 12', ..., 14, 14 ', .. ., 22, 22 ', ..., 25, 25', ...). Device according to one of claims 60 to 76,
characterized in that the setting devices (30, 30 ', ..., 31, 31', ...) are designed in such a way that they correct values (38, 38 ', ...) for determining the positions ( 8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25', ...) take into account, the determinable influencing variables can be assigned and are available as at least one selectable file (39, 39 ', ...) with empirical values. The device of claim 77,
characterized in that the selection of at least one file (39, 39 ', ...) is made via an input device. The device of claim 77,
characterized in that the selection of at least one file (39, 39 ', ...) by at least one setting device (30, 30', ..., 31, 31 ', ...) based on at least one measurement of at least one influencing variable he follows. Device according to one of claims 60 to 79,
characterized in that the sensors (23, 26, 26 ', ..., 27, 28, 28', ..., 29, 32) and the setting devices (30, 30 ', ..., 31, 31' , ...) are designed such that the effects of the influencing variables on the register are measured and the imaging is corrected in accordance with these deviations. Device according to one of claims 77 to 80,
characterized in that the influencing variable is at least one temperature in the printing press (1). Device according to claim 81,
characterized in that at least one temperature sensor is arranged in the printing press (1). Device according to one of claims 77 to 82,
characterized in that the influencing variable is at least one mechanical tension in the printing press (1). Device according to claim 83,
characterized in that at least one voltage sensor is arranged in the printing press (1). Device according to one of claims 77 to 84,
characterized in that the influencing variable is the paper type. Device according to one of claims 77 to 85,
characterized in that the influencing variable is the toner profile. Apparatus according to claim 86,
characterized in that it is equipped with a device for measuring a toner profile. Device according to one of claims 77 to 87,
characterized in that a sensor for detecting a displacement of a substrate (15) is provided on the carrier (4) and the setting devices (30, 30 ', ..., 31, 31', ...) are designed such that the positions of the image generations (11, 11 ', ...) are corrected to compensate for this shift. Device according to one of claims 60 to 88,
characterized in that the circumference of the drive roller (52) of the carrier (4) at a distance (64) between the image transfer points (5, 5 ', 5 ", 5''') of the color printing units (6, 6 ', 6", 6 ''') can be inserted as an integer. Device according to one of claims 60 to 89,
characterized in that at least one device (40, 40 ', ..., 41, 41', ...) based on the detection of the positions (8, 8 ', ..., 9, 9', ..., 12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25', ...) during printing, necessary corrections (42, 42 ', .. ., 43, 43 ', ...) of the positions (8, 8', ..., 9, 9 ', ..., 12, 12', ..., 14, 14 ', ..., 22, 22 ', ..., 25, 25', ...) determined and transmitted to the setting devices (30, 30 ', ..., 31, 31', ...) for implementation. Apparatus according to claim 90,
characterized in that at least one device (40, 40 ', ...) for determining the corrections (42, 42', ...) for the image beginnings (10) with the sensor (27) for detecting the positions (12, 12 ', ..., 14, 14', ..., 22, 22 ', ..., 25, 25' ...,) of the carrier (4) and with the sensor (29) for detecting the register marks (17, 17 ', 17 ", 17'''). Apparatus according to claim 90 or 91,
characterized in that at least one device (41, 41 ', ...) for determining the corrections (43, 43', ...) for areas (10 ', 10'', ..., 10 ⁿ ) of the partial color images (7, 7 ', ...), into which the image areas are divided, with the sensor (27 and / or 32) for detecting the positions (12, 12', ..., 14, 14 ', ... ) of the carrier (4) and with the sensor (29) for detecting the register marks (17, 17 ', 17 ", 17''') is connected (44). Device according to claim 92,
characterized in that devices (46, 46 ', ...) for emitting start signals (48, 48', ...) for the image starts (10) simultaneously start signals to devices (47, 47 ', ...) for assigning the areas (10 ', 10'', ..., 10 ⁿ ) into which the image area is divided, these devices (47, 47', ...) having sensors (26, 26 ', ...) for detecting the positions of the image cylinders (2, 2 ', ...) are connected and these positions are assigned to the areas (10', 10 ", ..., 10 ⁿ ) into which the image area is divided . Device according to one of claims 60 to 93,
characterized in that a sensor (44) for detecting a printing substrate (15) which is fed to the printing press (1) is arranged on the path of the printing substrates (15) to the printing press (1) and with the setting devices (30, 30 ', ..., 31, 31 ', ...) is connected, wherein the calculation of the assignment of the positions of the image forming sites (11, 11', ...) to the printing substrate (15) is started when a printing substrate (15) is detected. 94. The apparatus of claim 94,
characterized in that a sensor (23) for precisely detecting the front edges (24) of printing substrates (15) is arranged on the carrier (4) and is connected to a device (46, 46 ', ...) which connects the paths or Calculates angular positions (22, 22 ', ...), which the printing substrate travels from the sensor (23) to the positions (25, 25', ...) of the start of the respective imaging and causes the beginning of the same in these positions. Multi-color printing machine (1) with a device for register adjustment according to a method according to one of claims 1 to 59, wherein the multi-color printing machine (1) with different printing colors assigned color printing units (6, 6 ', ...) with image cylinders (2, 2',. ..), devices (3, 3 ', ...) for generating images, in particular electrostatic latent images, on the image cylinders (2, 2', ...), a carrier (4) for printing substrates (15) and image transfer points (5, 5 ', 5 ", 5''') for the transfer of the partial color images (7, 7 ', ...) from the color printing units (6, 6', 6", 6 ''') to printing substrates (15), sensors (23, 26, 26 ', ..., 27, 28, 28', ..., 29) for position detection and at least one control and regulating device (30, 30 ', ..., 31 , 31 ', ...) for assigning the positions of the image generation points (11, 11', ...) on the image cylinders (2, 2 ', ...) to printing substrates (15) in order to achieve a register match of the partial color images (7 , 7 ', ...) at the D is quickly equipped
characterized in that the sensors (23, 26, 26 ', ..., 27, 28, 28', ..., 29) for detecting the positions of elements carrying the image and the substrate (2, 2 ', ... , 4, 13, 13 ', ...) and that at least one setting device (30, 30', ..., 31, 31 ', ...) is designed such that it positions the positions of the image generation (11 , 11 ', ...) on the image cylinders (2, 2', ...) to the printing substrates (15) with respect to at least one defined area (10, 10 ', 10 ", ..., 10 ⁿ ) of the partial color images (7, 7 ', ...) independent of time.

Images