DE2751862A1 - METHOD AND DEVICE FOR STRIPPING AND DEVELOPING A LIGHT-SENSITIVE MATERIAL - Google Patents

Description

P ^ TEM TANMVALTE A. GRÜ.MIECKER

** H. KINKELOEY

A / DIQ 0 C _w STOCKMAlR

X. SCHUMANN P. H. JAKOB

OH »- '».-J

G. BEZOLD

OR Γ * «MAT ΟΡ · - (_ ι νΛ

8 MUNICH

MAX1Mlt-1A ^ 4STRAS5E AJ

Nov 21, 1977

P 12 165

Fuji Photo Film Co., Ltd.

No. 210, Nakanuma, Ilinami Ashigara-shi, Kanagawa, Japan

Method and device for stripping and developing a light-sensitive material

The invention relates to a method and an apparatus for stripping and, in particular, developing a photosensitive Material, being an image on a photosensitive material consisting of a cover sheet which is laminated to a support part by interposing a photosensitive layer, in a visual image is developed by stripping the liner from the support member.

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TELEPHONE (OSS) 999809 TELEX Οβ-9β3 »Ο TELEGRAMS MONAPAT TELECOPER

A photosensitive material consists of, for example a support member, such as an aluminum plate, a photosensitive layer that is exposed to light Contains curable material, and a translucent cover pad or base, such as a polyethylene terephthalate film; such a photosensitive one Material has the following functionality: The area of the light-sensitive layer exposed to light exposed, ie exposed, is cured so that it adheres to the support part, while the unexposed Surface adheres to the cover sheet; the image on the photosensitive material is made on the support member developed as a Re.sist or masking lacquer or protective lacquer image by removing the masking underlay from the light-sensitive Material is stripped off.

In a conventional method of developing a such photosensitive material, development is carried out by applying an adhesive tape to the surface of a Cover pad applied or glued on and the adhesive tape for stripping the cover pad from the support part is recorded or used. However, such a device requires additional material, namely the adhesive tape; In addition, a feeding mechanism for the adhesive tape is required, so that increased manufacturing and Operating costs result. And finally, difficulties arise with such a device all the time, as often the adhesive tape does not adhere sufficiently to the masking pad.

Another conventional method uses a roll used, which are provided with suction holes in their peripheral surface is, so that during development, the cover pad is stripped off under the action of suction forces can be. However, this method requires a vacuum pump and an air control mechanism,

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so that such a device can no longer be made compact, but requires a relatively large amount of space; in addition, the manufacturing costs of such a large i-machine are relatively high.

In one of the basic techniques "for stripping a surface layer one end of a surface layer to be stripped is provided with a certain friction by For example, such a surface layer is rubbed or scrubbed with the fingers, as is also the case in Everyday life is usually carried out. The Abstreifentwidiung using these frictional forces is in Japanese Patent Application No. Sho 51-129025 entitled "Apparatus for Developing a Photosensitive Materials "and Japanese Utility Model Application No. Sho 51-148 666 entitled" Apparatus for the development of a light-sensitive material "; these two patent applications are from assigned to the same assignee as the present invention. These developing devices are designed to have a cover pad at one end due to frictional forces along a transport passage for the photosensitive material is stripped in a direction opposite to the shifting direction of the photosensitive material. In the The first mentioned patent application is the stripping of a cover pad by rotating a roller with many small protrusions described on their peripheral surface, while in the utility model application a friction arrangement to make it easier to remove a cover pad is explained in the following, final stripping and developing step, so that the cover sheet can be more easily separated from the support part.

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It is an object of the present invention to compare with the conventional methods such as those in the above mentioned patent and utility model application are explained, improved stripping and developing device or to create a method, wherein a first or preparatory stripping step with a friction device can be used to facilitate the stripping of a cover sheet and a final or final stripping and developing step, so that overall better Results.

According to the present invention, there is provided a stripping and developing method for a photosensitive material proposed, which consists of a cover underlay, with the interposition of a light-sensitive layer is laminated to a support part, with the development of the image in a visible image on the support part the cover pad is stripped from the support part; this stripping and developing process stands out through a preparatory stripping step in which the cover sheet is transported in the front end region of the photosensitive material due to Frictional forces in a direction opposite to the direction of transport of the photosensitive material is; is stripped; then the front end region of the cover pad thus separated becomes the again transport direction of the photosensitive material oriented or arranged to the cover substrate with the support part align; in the following, final stripping and developing step, the cover sheet becomes the photosensitive Material subjected to the preliminary stripping step from its front end portion and as a result then stripped off to the rear end, whereby the cover pad is completely separated from the support part. So far, there have often been problems when stripping the cover

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the support part when the front end of the cover sheet, which was partially separated with that of the support member was not properly aligned; this bug in the Alignment is due to the fact that the front end of the cover pad during transport of the twisting photosensitive material upward from the preliminary stripping step to the final stripping and developing step; aside from that a gap can be formed between the surface of the cover sheet and the suction surface when a Suction system is used as a stripping and developing device; even then, there may be misalignment result, although the suction power is very weak per se. In order to avoid this disadvantage, according to the method according to the present invention, the front end of the cover sheet, which is stripped from a support part, in order to facilitate the separation in the following, final stripping step, aligned with the support part so that the photosensitive material to the last stripping and Development step can be transported while the cover pad is held in such a position becomes that it can be separated easily.

The preparatory stripping step consists of the following individual steps: The masking pad is attached to your front end is stripped from the support part, and then the front, so separated end of the cover pad is in brought an aligned position with the support part. When stripping the front end of the cover pad from the Support part, a friction device is actuated in a direction opposite to the direction of movement of the photosensitive material, so that frictional forces occur between these surfaces. The friction device can be a material with a fine, sharp, use a rough surface, such as a file material or rough material processed with the file,

or a material in the form of a brush. Although the friction device can in principle be designed in any form, according to a preferred embodiment a file, a roller or a tape or a belt is used. The once severed front end the cover pad can be brought into an aligned position with the support part by the friction device in a direction that is reversed or opposite to the stripping direction of the cover pad, at a speed is rotated, which is higher than the displacement or moving speed of the photosensitive material is; As an alternative to this, a return or reset device can also be used separately from the friction device are provided.

A preferred idea is a method or a Apparatus for developing a photosensitive material, with an image on a photosensitive Material, which consists of a covering underlay which, with the interposition of a light-sensitive Layer is laminated to a support part by stripping the cover liner from the support part into a visible one Figure is being developed. First, in a preparatory stripping step, the cover pad is in stripped of their front end region from the support part. Immediately thereafter, the front end area becomes the Cover pad reoriented to bring it into alignment with the support member. This can then the last stripping step can be carried out, in which the cover substrate is continuously or successively is separated from its front end region to its rear end from the support part.

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The invention will be described in the following on the basis of exemplary embodiments with reference to the accompanying schematic Drawings explained in more detail. It shows

1 to 6 side views of different embodiments of the preparatory stripping step,

7 to 14 and 16, respectively, are side views of the last stripping step, and

15 is a side view of a stripping and developing device; with which the preparatory stripping step and the final stripping step can be performed consistently according to one embodiment of the invention.

In the embodiments shown in Figures 1 to 3, a friction device is used to facilitate the Wiping off a cover pad in the following, last wiping line is used, also used to cover the pad to align with the supporting part. In the embodiment of Figure 1, a friction device is in the form a plate with a rough surface or with many wires or threads or fibers made of hard material their surface provided. Figure 2 shows a friction device in the form of a roller, the circumferential surface is designed as a brush; as an alternative to this, on the circumferential surface of the roller, a belt with many Threads or fibers made of hard material are attached. Figure 3 shows a friction device in the form of a Band or belt on which threads or fibers made of hard material are located. In each of these embodiments, the respective friction device is in the direction of the arrow B actuated or moved in order to strip off the covering underlay at its front edge from the support part;

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then the friction device is in the direction of the Arrow C actuated or moved to the direction of the masking pad so reset or returned to the starting position so that they are aligned with the support part is.

Figures 4 to 6 show further embodiments which a return device is provided separately from the friction device to the front end area align the cover pad with the front end area of the support part. In the embodiment according to Figure 4 are first brush rollers, which are arranged side by side, as a friction device in the direction of arrow B rotated while second brush rollers are arranged side by side so that a brush roller element the above-mentioned waling in engagement with one another Brush roller elements of the frame or ' the arrangement is introduced and rotated in the direction of arrow C as a return device. In the embodiment according to Figure 5 is a brush roller with a large diameter, which serves as a friction device, while a small diameter brush roller spaced from the large diameter brush roller is used as a return device. In this embodiment the friction device becomes independent rotated in the direction of arrow B by the return device, which in turn is rotated in the direction of arrow C. In the embodiment of Figure 6, a group of endless belts is used, the side are arranged side by side and have threads or fibers made of hard material on their surfaces; this group of endless belts is rotated as a friction device in the direction of arrow B; with another group the endless belts are arranged side by side so that a belt element is between the adjacent belt elements the first mentioned group of endless ribbons

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is located; this group of endless belts, which also have threads or fibers made of hard material, is called Return device rotated in the direction of arrow C.

In the last, final stripping step, the entire cover substrate is stripped from the support part, and starting from the front end region one after the other to the rear end; this is the front end area of the cover plate subjected to the preparatory stripping step and into an aligned in the preparatory stripping step Position has been brought with the supporting part. In this last stripping step, the cover pad is stripped from the support part, starting from the front end one after the other to the rear end; in this way the masking pad becomes completely separated from the support part. A stripping device can be used in this step also serves as a separator; as an alternative to this, a combination of a stripping device and a Separating device be provided. The stripping device can employ various techniques, for example Suction forces, blowing in air or air blowers, separating sheets or separating blades as well as frictional forces. As a separator can for example transport rollers, conveyor belts, a link or connecting mechanism that can be moved to and fro with a device to clamp the front end of the cover plate or a device used which peel off the cover sheet by pushing the front end or the side edge of the cover plate through a needle or a pawl or lock is fixed.

In the embodiment of FIG. 7, a stripping device used, which consists of a suction roll and a squeegee roll. In this embodiment it reaches the front end of the cover sheet that has been subjected to the preparatory stripping step, a suction opening of the suction roll and is through

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the suction forces generated by the pressure reduction are attracted to the peripheral surface of the suction roll, then pulled down with the rotation of the suction roll and between the squeegee roll or counter-pressure roll and the suction roll introduced. At this point in time, the suction forces resulting from the pressure reduction are canceled, and the Cover pad is made by the rotation of the suction roller and the counterpressure roller as a whole separated from the support part, as shown in FIG. Fig. 9 shows a stripping device with a clamping and pulling pawl, the clamping pawl having a wire brush in its tip area and sees closes while the front end of the cover pad, which is subjected to the preparatory stripping step has been scrubbed or scrubbed; when the pawls are moved down, the front end becomes the Covering pad clamped between their tips, whereby the covering pad is separated from your support part as it is is shown in FIG.

In the embodiment according to FIG. 11, a suction roll with a clamping pawl is provided as a stripping device. At this Embodiment is the front end of the cover sheet, which has been subjected to the preparatory stripping step, guided under suction into a suction hole in the suction roll; then a pawl facing the suction hole becomes the one in Fig. 12 shifted position shown, and the suction roll is rotated to separate the cover pad from the support part.

Fig. 13 shows a further embodiment of the last, final Stripping step in which a stripping roller 26 and a counter roller 27 are provided under guide plates are. As can be seen in particular in FIG. 14, the stripping roller 26 is produced by a roller consisting of a one-piece metal core is prefabricated, which consists of an area 31 with a large diameter, areas 32 with small Diameter and grooves or recesses 33; thieves-

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Areas with a large diameter alternate with areas with a small diameter and are separated by the grooves. Then a layer or a sheet or a sheet is created 35 made of rubber provided with projections on the surface on the peripheral surfaces of the respective areas 32 attached to the roller with a small diameter, thereby forming separating roller areas; in the end a band of cloth or fabric 36 is embedded in the plastic threads or fibers with curved tips are on the peripheral surfaces of the respective areas 31 attached with a large diameter, creating brush roller areas.

When the front end of the transported photosensitive Material P comes into contact with the brush roller portions of the squeegee roller 26, which rotates in a direction the opposite to the direction of movement of the photosensitive Material is, then the cover material F is stripped at its front end from the support part, and that End of the cover pad F cut off in this way is rotated further with the rotation of the brush roller portions. When the front end of the cover pad comes into contact with the counter rollers 27, its front end passes through the Rotation of the backing rolls in the gap between the backing rolls and the separating rolls, which are similar to the backing rolls and they touch; under the guidance of stripping ribs 29B and separating ribs 29A, which are located at the outlet area between the two Rollers are provided, the cover plate F is transported or output downwards without the risk of that it adheres to the stripping roller 26 and to the counter roller 27.

In Fig. 13, an advantageous embodiment of a device according to the invention is shown, with which the preparatory stripping step and the last stripping and development step constantly or consistently without the risk of Disturbances can be carried out. How in detail

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from Fig. 13, the photosensitive material becomes P as shown in this figure by a pair of transport rollers 1 moved from left to right, with its cover pad surface is directed downwards. When the front end of the photosensitive material P through detectors 23 is detected, then the brush 2 for the preparatory stripping step and the return brush 3 begin rotating in a counterclockwise or clockwise direction. At the time in which the photosensitive material P moves to a point with its leading end in contact with the brush roller 2 for the preparatory stripping step comes and the cover pad F is stripped at the front end of the support part, the rotation of the brush roller for the preliminary stripping step, reversed in the counterclockwise direction (namely, in the clockwise direction); this is done under the control of a counter (not shown), which has counted from the point in time when the leading end of the photosensitive material P passes through the detectors 23 has been established. The cover pad F, the front end area of which is separated from the support part is made by the rotation of the brush roller 2 for the preparatory stripping step and the return brush roller 3 brought in a clockwise direction in an aligned position with the support member. When the photosensitive material P is moved further to the right and its leading end is detected by detectors 24, then a roller brush begins 5 for the final, final stripping step by turning counterclockwise at high speed to rotate to separate the cover pad F from the support member that will align therewith after the preparatory stripping step has been; the front end of the cover pad F is between a separation roller 6 and one of these opposite Counter or nip roller 7 introduced with a small diameter; the separation roller 6 rotates in the same direction like the brush roller 5 for the final stripping step

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and is arranged coaxially to it. Then the brush roller 5 for the final stripping step and the separating roller 6 under the control of a further counter (not shown), which has counted from the beginning of the triggering of the detectors 24, by a certain angle in the direction rotated clockwise while the separation roller 6 at a contact point between the counter roller 7 and a Pressure roller 17 is in contact with the counter roller 7. As a result, the roller brush 5 for the final Stripping step and the separation roller 6 from the transport passage for the photosensitive roller (in the Figure of the horizontal direction from left to right) shifted down, so that these rollers no longer the Touch the surface of the support part, has been stripped from the cover pad F; there is no longer any danger that the surface of the support part can be damaged by these rollers.

The thus separated cover sheet F is at a passage between a unit of a support roller 8, which the counter roller 7 supports, and an auxiliary roller 9, which is coaxial. is arranged to the support roller and rotates independently of the support roller in the clockwise direction, and the Separation roller 6 and passed a passage between two conveyor belts 10, 11 to a conveyor belt 15, on the air is blown by a fan 18; this G. bubble is on the right side of the ribbon 15; then the cover pad F is conveyed down along the conveyor belt 15. The cover pad F occurs then in the gap between the pressure roller 19 and a take-up roller 20, which by the force of a spring 21 against the pressure roller 19 is pressed. As the cover sheet F is moved downward with its adhesive surface to the right is directed, the cover pad can due to the adhesion or adhesive strength of the cover pad itself and the effect the pressure roller 19 adhere to the circumference of the take-up roller 20, whereby it is continuously wound up by the roller 20

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is wrapped.

The brush roller 2, which is used in this embodiment in the preparatory stripping step, must have a comparatively high rigidity when it comes into contact with the cover pad. The length of the brush element can be greater for a stiff, elastic material, but according to a preferred embodiment it is small or short for a soft, elastic material. The brush material can be a natural or an artificial material; In both cases , the brush material can be designed in the form of a bundle of metallic or plastic threads or fibers or in the form of a brush. Alternatively, a plastic or rubber roller with fine, thin projections on its surface can be used. According to a preferred embodiment, the material for the counter roller or nip roller 7 used in the final stripping step has a large coefficient of friction; It is therefore expedient to use a plastic or rubber .

In addition to the embodiments that have been implemented so far of the final stripping step, the arrangement shown in Figure 16 can also be used. In the embodiment form according to FIG. 16, a stripping roller is used, which consists of separating roller areas 6 and brush roller areas 5, which have a larger diameter than that Have separating rollers; as shown in Fig. 14, the first-mentioned areas alternate side by side with the last mentioned areas. The doctor roller is rotated in a direction opposite to the direction of movement of the photosensitive material P passing through an arrow A is indicated, so that the cover pad F is stripped by the brush roller areas 5 from the support part, starting from its front end and then one after the other to the rear end. The thus separated cover sheet F is through the separation roller areas and the

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Counter roller 7, which are thus in pressure contact, pulled down. Back-up rollers 8, which are in contact with the Rotating counter roll 7 are fixedly mounted on a shaft 8a; Auxiliary rollers 9 are arranged side by side so that they alternate with the backup rollers 8; the auxiliary rollers 9 are supported by ball bearings on the shaft 8a. So be so all the backup rolls 8 rotated at the same speed by the counter roll 7, and the auxiliary rolls 9 are in the Contact with the brush roller portions 5 rotated in a direction opposite to the direction of rotation of the support rollers 8, namely in a direction in which the cover pad is pulled downwards. So it becomes the cover pad F in the direction of arrow D by the combination of the brush roller areas 5 and the auxiliary rollers 9 delivered or issued without adhering to the surface of the squeegee roller 7.

The stripping and developing method of the present invention enables positive, secure separation of the liner from the supporting part by a mechanism of simple construction, with no additional material, such as an adhesive tape is required; in addition, there is no risk of damage to the surface of the supporting part could be. When the front end portion of the photosensitive Material, the preparatory stripping step has been subjected, previously exposed or exposed to light, then the adhesion or bond strength of the cover sheet for the light-sensitive layer in the exposed th area is smaller, so that there are different adhesion or bond strengths between the exposed and the unexposed Results in areas of the photosensitive material. This facilitates the safer one in the preparatory stripping step Separation of the cover sheet only in the front, exposed end area.

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Claims (2)

PATENTANWÄLTE A. GRUNECKER DIP · - "N1I H. KINKELDEY 2751862 W. STOCKMAlR K. SCHUMANN W c <EH VAT C / -L ·? * FS PH JAKOB G. BEZOLD DR γϊΛΝΑΓ- OPL-CKM. 8 MUNICH MAXIMILIANSTRASSE P 12 165 Claims 1. Method of stripping and developing a photosensitive Material, which consists of a cover backing, which by interposing a light-sensitive layer a support member is laminated, wherein the cover sheet is stripped from the support member, whereby a visible image arises on the support part, characterized in that in a preparatory step in the front end area of the photosensitive material (P) the cover sheet (F) is stripped from the support part, the stripping due to frictional forces taking place in a direction which opposite to the direction of movement of the photosensitive material (P), with subsequent reorientation of the front end portion of the cover sheet (F) to the moving direction of the photosensitive material (P) is to align the front end portion of the cover pad (F) with the support part, and that in a final Stripping step of the cover sheet (F) of the photosensitive material (P) after the preliminary stripping step is stripped, starting from their front end area one after the other or successively to their rear end, whereby the cover pad (F) is completely separated from the support part. 809822/0716 TBLBlON (OSB) 39 9119 TfLsA Uo-UWSMO IHLEOfTAMMS MONAPAT TCLEKO ° IERER 2. Apparatus for stripping and developing a photosensitive material, which consists of a cover sheet which is laminated to a support part by means of an intermediate switch of a photosensitive layer, the cover sheet being stripped from the support part, as a result of which a visible image is formed on the support part, characterized by a A device which transports the photosensitive material (P) with the cover sheet (F) facing downwards, through a device for detecting the front end region of the photosensitive material (P)
a first friction device, which can be actuated or moved in the direction of movement of the photosensitive material (P) and in a direction opposite thereto, by a device for controlling the actuation direction of the first friction device, by a second friction device, which is in the direction of the direction of movement of the photosensitive Material (P) and can be moved or actuated in a direction opposite thereto, and by a device that continuously removes the cover pad stripped from the support part by the second friction device
(F) subtracts. 809822/0716