DE3714157A1 - Method for offset printing and offset printing plate - Google Patents

Method for offset printing and offset printing plate

Info

Publication number
DE3714157A1
DE3714157A1 DE19873714157 DE3714157A DE3714157A1 DE 3714157 A1 DE3714157 A1 DE 3714157A1 DE 19873714157 DE19873714157 DE 19873714157 DE 3714157 A DE3714157 A DE 3714157A DE 3714157 A1 DE3714157 A1 DE 3714157A1
Authority
DE
Germany
Prior art keywords
printing plate
offset printing
laser
plate
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE19873714157
Other languages
German (de)
Inventor
Hans Grabensee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19873714157 priority Critical patent/DE3714157A1/en
Priority to DE19878706120 priority patent/DE8706120U1/de
Publication of DE3714157A1 publication Critical patent/DE3714157A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/032—Graining by laser, arc or plasma means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1033—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials by laser or spark ablation

Abstract

The invention relates to a water-conducting offset printing plate having an anti-oxidation layer with microgranulation, attached on a plate cylinder, a so-called set-up printing plate, and is distinguished by a laser jet treatment of the generally non-printing surfaces of the offset printing plate, the printing regions being smoothed out on their surface by the laser treatment.

Description

1. Die TLP-Offset-Platte1. The TLP offset plate

Die Laserbehandlung der Offset-Platte in der Offset-Druckmaschine geht von dem klassischen Prinzip der Offset-Platte aus:
Druckende Stelle = hydrophobe
Nichtdruckende Stelle = hydrophileThe laser treatment of the offset plate in the offset printing machine is based on the classic principle of the offset plate:
Printing area = hydrophobic
Non-printing area = hydrophilic

Die Oberflächenstruktur einer Offset-Platte ist gekörnt und reagiert nach dem physikalischen Gesetz der Kapillarität.The surface structure of an offset plate is grained and reacts according to the physical law of capillarity.

In den herkömmlichen Herstellungsverfahren wird eine leichte empfindliche "druckende" Schicht auf die Plattenoberfläche aufgetragen.In the conventional manufacturing process, a light sensitive one "printing" layer applied to the plate surface.

TLP setzt unbeschichtete Platten voraus.TLP requires uncoated panels.

Die rohe Platte ist wasser­ führend und mit einer Antioxi­ dationsschicht versehen. Die Herstellung ist sehr einfach und bekannt (Fig. 1):
Entweder durch ein galvanisches Bad oder die Mikrokörnung wird elektrolytisch erzielt. Die Herstellungskosten betragen 1/3 der traditionellen Platten.The raw plate is water-bearing and has an antioxidant layer. The production is very simple and known ( Fig. 1):
Either by a galvanic bath or the micro-grain is achieved electrolytically. The manufacturing costs are 1/3 of the traditional boards.

2. Der Laser2. The laser 2.1. Laserinstallation in der Druckmaschine2.1. Laser installation in the printing press

Die Laserbehandlungseinheit wird an jedem Plattenzylinder einer Offset- Druckmaschine installiert (Bogenoffset- oder Rollenoffsetmaschine). Die angebrachte Gleitschiene ermöglicht dem Laser, der einen Abstand zur Offsetplatte von weniger als 1 mm hat, von links nach rechts während der Behandlung der Offsetplatte zu fahren. Das Leitgestänge wird so befestigt, daß keine Vergrößerung der maschinellen Schwingungen hervor­ gerufen werden können und die Plattenzylinderschwingung mit der Laservibration identisch ist.The laser treatment unit is placed on each plate cylinder of an offset Printing machine installed (sheetfed or web offset machine). The attached slide rail allows the laser to be a distance from the Offset plate of less than 1mm left to right during the treatment of the offset plate. The guiding linkage is like this attached that no increase in machine vibrations emerged  can be called and the plate cylinder vibration with the Laser vibration is identical.

Während des Druckvorganges bleibt der Laser in Schutzposition, um eine Verschmutzung zu vermeiden (Fig. 2).During the printing process, the laser remains in a protective position to avoid contamination ( Fig. 2).

2.2. Arbeitsprinzip des TLP2.2. Working principle of the TLP

Der Laserstrahl zerstört die hydrophile Plattenoberfläche. Die behandelte Stelle wird hydrophob und erlaubt dadurch die Druckfarbannahme. Das Druckfarbvolumen auf einem TLP-behandelten Rasterdruck ist größer als die auf einem herkömmlichen Rasterpunkt und die Flächenabgrenzung stellt einen Verschleißschutz der druckenden Flächen während des Auflagendruckes dar (Fig. 3).The laser beam destroys the hydrophilic plate surface. The treated area becomes hydrophobic and allows the ink to be accepted. The printing ink volume on a TLP-treated halftone print is larger than that on a conventional halftone dot and the area delimitation represents wear protection of the printing areas during the edition printing ( FIG. 3).

2.3. Lasersteuerung (Fig. 4)2.3. Laser control ( Fig. 4)

Das zu druckende Sujet existiert als numerisches Produkt eines Text- oder Bildverarbeitungssystems oder eines Umbruchsystems. Statt einen Film zu belichten, behandelt TLP direkt die Offsetplatte aufgrund der numerischen Informationen über die druckenden Stellen und berück­ sichtigt durch seine Mikroprozessorausstattung die maschineneigene Ton­ wertzunahme des Rasterpunktes. The subject to be printed exists as a numerical product of a text or image processing system or a wrap system. Instead of one To expose film, TLP directly treats the offset plate due to the numerical information about the printing places and back visualizes the machine's own sound through its microprocessor equipment increase in the value of the grid point.  

2.4. Tonwertzunahme2.4. Dot gain

Durch die geringfügig niedrigere Lage des Rasterpunktes in bezug auf die hydrophile Schicht ist die Tonwertzunahme während der Übertragung vom Platten- auf den Gummituchzylinder wesentlich ge­ ringer als bei der Übertragung von herkömmlichen Druckplatten. Die mechanische Punktvergrößerung bei der Übertragung vom Gummi­ tuchzylinder auf den Bedruckstoff (Papier) bleibt unverändert.Due to the slightly lower position of the grid point in relation on the hydrophilic layer is the dot gain during the Transfer from the plate to the blanket cylinder significantly ge less than when transferring conventional printing plates. The mechanical point enlargement when transferring rubber blanket cylinder on the substrate (paper) remains unchanged.

3. Die wesentlichen Vorteile3. The main advantages 3.1. Synchronisierung3.1. Synchronization

Die TLP-Behandlung der Offsetplatte in der Druckmaschine erfolgt im Schneckentempo und auf allen eingerichteten Platten gleichzeitig.The TLP treatment of the offset plate in the printing press takes place in the At a snail's pace and on all the plates set up at the same time.

3.2. Paßgenauigkeit3.2. Accuracy of fit

Von Anfang an ist eine 100%ige Paßgenauigkeit des Vierfarbdruckes gewährleistet unter der Voraussetzung, daß die Druckmaschine mechanisch einwandfrei funktioniert.Right from the start there was a 100% accuracy of the four-color printing assured provided the printing press works mechanically perfectly.

3.3 Einrichten der Druckplatten3.3 Setting up the printing plates

Das TLP-System benötigt nur das Befestigen der Druckplatten ohne irgendein Registersystem.The TLP system only requires the printing plates to be attached without some register system.

3.4. Korrekturen3.4. corrections

Die nachträglich notwendigen Positivkorrekturen werden durch TLP- Behandlung erstmals möglich, das Beseitigen von unerwünschten drucken­ den Stellen erfolgt durch Anodisierung.The subsequently required positive corrections are made by TLP Treatment possible for the first time, eliminating unwanted print the spots are made by anodizing.

3.5. Auflagenbeständigkeit3.5. Print run resistance

Die Offsetplatten mit einer Chromschicht (hydrophile) haben eine hohe Auflagenbeständigkeit. The offset plates with a chrome layer (hydrophilic) have a high Print run resistance.  

3.6. Produktionseinsparung3.6. Production savings

Die wesentlichen Kosteneinsparungen ergeben sich durch das Weg­ fallen der Sonnen-Filmbelichtung, Filmmontage, Formmontage und der traditionellen Plattenkopie.The main cost savings result from the way fall of the sun film exposure, film assembly, mold assembly and the traditional plate copy.

Claims (13)

1. Wasserführende Offsetdruckplatte mit einer Antioxidations­ schicht mit Mikrokörnung, in Aufspannung auf einen Platten­ zylinder, sog. eingerichtete Druckplatte, gekennzeichnet durch eine Laserstrahlbehandlung der allgemein nicht druckenden Oberfläche der Offsetdruckplatte, wobei die druckenden Bereiche auf deren Oberfläche durch die Laserbehandlung eingeebnet sind.1. Water-bearing offset printing plate with an antioxidation layer with micro-grain, in a clamping on a plate cylinder, so-called. Arranged printing plate, characterized by a laser beam treatment of the generally non-printing surface of the offset printing plate, the printing areas on the surface being leveled by the laser treatment. 2. Offsetdruckplatte nach Anspruch 1, dadurch gekenn­ zeichnet, daß die Chromschicht an den laserbehandelten Stellen flachgeschmolzen, wasserabweisend und farb­ annehmend ist.2. offset printing plate according to claim 1, characterized records that the chrome layer on the laser-treated Places melted flat, water-repellent and color is accepting. 3. Offsetdruckplatte nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß bei Druck­ maschinen mit Schmitzringläufer die Leitstange für die Bewegung der Laserlichtquelle den Schmitzring kontaktierend ausgebildet ist.3. Offset printing plate according to one of the preceding An sayings, characterized in that at pressure machines with bearer ring guide for the movement of the laser light source the bearer ring is designed to be contacting. 4. Offsetdruckplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei Maschinen mit variabler Druck­ beistellung das Gestänge an der Achse des Platten­ zylinders befestigbar ist. 4. offset printing plate according to claim 1 or 2, characterized characterized that in machines with variable pressure provide the linkage on the axis of the plate cylinder is attachable.   5. Offsetdruckplatte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Laser­ lichtquelle so ausgebildet ist, daß sie die Chrom­ schicht verdampfungsfrei anschmilzt.5. Offset printing plate according to one of the preceding Claims, characterized in that the laser Light source is designed so that it is the chrome layer melts without evaporation. 6. Offsetdruckplatte nach Anspruch 5, dadurch gekenn­ zeichnet, daß die Laserlichtquelle eine Rasterpunkt­ auflösung von wenigstens 4 µ aufweist.6. offset printing plate according to claim 5, characterized records that the laser light source is a halftone dot has a resolution of at least 4 µ. 7. Offsetdruckplatte, sog. eingerichtete Druckplatte, nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine zentrale Steuereinheit, die die Druck­ form in digitalisierter Gestalt in Behandlungs­ impulse des Lasers umsetzt.7. offset printing plate, so-called arranged printing plate, according to one of claims 1 to 6, characterized through a central control unit that controls the pressure form in digitized form in treatment impulses from the laser. 8. Offsetdruckplatte nach Anspruch 7, dadurch gekenn­ zeichnet, daß jeder Druckmaschine eine eigene Steuer­ einheit zugeordnet ist, die die jeweiligen am Platten­ zylinder befindlichen Laser steuert.8. offset printing plate according to claim 7, characterized records that each printing press has its own tax Unit is assigned to the respective on the plates cylinder located laser controls. 9. Offsetdruckplatte nach einem der Ansprüche 7 und 8, gekennzeichnet durch einen on-line mit der Zentral­ einheit verbundenen Bildschirmarbeitsplatz, der die numerischen Informationen in Steuerungsinformationen umwandelt und damit die druckmaschinenspezifische Tonwertzunahme berücksichtigt. 9. offset printing plate according to one of claims 7 and 8, characterized by an on-line with the central unit connected workstation, which the numerical information in control information converts and thus the press-specific Dot gain taken into account.   10. Verfahren zum Offsetdrucken, wobei eine mit Anti­ oxidationsschutzschicht versehene registerstanzfreie Druckplatte auf dem Plattenzylinder eingespannt wird, die Druckmaschine auf allen Zylindern synchron im Kriechgang in Drehung versetzt wird, dadurch gekenn­ zeichnet, daß zum Herstellen der druckenden Stellen die Druckplatte farbselektiv mit Laserstrahlen be­ strahlt wird.10. Process for offset printing, one with anti anti-oxidant coating provided with register punch free Pressure plate is clamped on the plate cylinder, the press on all cylinders in sync Crawl gear is set in rotation, characterized records that for making the printing the printing plate be color selective with laser beams shines. 11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß senkrecht zur Druckplattenoberfläche mit Laser bestrahlt wird.11. The method according to claim 10, characterized in that perpendicular to the printing plate surface with laser is irradiated. 12. Verfahren nach einem der Ansprüche 10 oder 11, dadurch gekennzeichnet, daß die Laserlichtquelle unter einem Abstand im Bereich von 1 mm zur Druck­ platte bewegt wird.12. The method according to any one of claims 10 or 11, characterized in that the laser light source at a distance of 1 mm from the print plate is moved. 13. Verfahren nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß die Laserlichtquelle vibrationsfrei hin und her verfahrbar ist.13. The method according to any one of claims 10 to 12, characterized in that the laser light source can be moved back and forth without vibration.
DE19873714157 1987-04-28 1987-04-28 Method for offset printing and offset printing plate Ceased DE3714157A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873714157 DE3714157A1 (en) 1987-04-28 1987-04-28 Method for offset printing and offset printing plate
DE19878706120 DE8706120U1 (en) 1987-04-28 1987-04-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873714157 DE3714157A1 (en) 1987-04-28 1987-04-28 Method for offset printing and offset printing plate

Publications (1)

Publication Number Publication Date
DE3714157A1 true DE3714157A1 (en) 1988-11-17

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DE19878706120 Expired DE8706120U1 (en) 1987-04-28 1987-04-28
DE19873714157 Ceased DE3714157A1 (en) 1987-04-28 1987-04-28 Method for offset printing and offset printing plate

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339737A (en) * 1992-07-20 1994-08-23 Presstek, Inc. Lithographic printing plates for use with laser-discharge imaging apparatus
US5351617A (en) * 1992-07-20 1994-10-04 Presstek, Inc. Method for laser-discharge imaging a printing plate
US5353705A (en) * 1992-07-20 1994-10-11 Presstek, Inc. Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus
US5379698A (en) * 1992-07-20 1995-01-10 Presstek, Inc. Lithographic printing members for use with laser-discharge imaging
US5385092A (en) * 1992-07-20 1995-01-31 Presstek, Inc. Laser-driven method and apparatus for lithographic imaging
USRE35512E (en) * 1992-07-20 1997-05-20 Presstek, Inc. Lithographic printing members for use with laser-discharge imaging
DE20011699U1 (en) * 2000-07-07 2001-11-22 Web Tech Licensees B V Printing machine for printing on sheets or webs

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1965231A1 (en) * 1969-02-19 1970-09-10 Svu Materialu Pressure measuring probe arrangement for compacted material
DE2448325B2 (en) * 1974-10-10 1976-09-23 Hoechst Ag, 6000 Frankfurt PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2524701A1 (en) * 1975-06-04 1976-12-16 Hoechst Ag PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2607207A1 (en) * 1976-02-23 1977-09-01 Hoechst Ag PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2043140B2 (en) * 1970-08-31 1980-09-25 Agfa-Gevaert Ag, 5090 Leverkusen
DE3040476A1 (en) * 1980-10-27 1982-06-03 Vsesojuznyj naučno-issledovatel'skij institut kompleksnych problem poligrafii, Moskva Offset printing plate based on chromium plated steel - has printing elements treated with higher unsatd. fatty acid and hydrophilised non-printing elements
DE3248178A1 (en) * 1982-12-27 1984-07-05 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt IMAGE COATING OF PRINTING FORMS FOR FLAT PRINTING
DE2728858C2 (en) * 1977-06-27 1986-03-13 Hoechst Ag, 6230 Frankfurt Process for the production of planographic printing forms with laser beams

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1965231A1 (en) * 1969-02-19 1970-09-10 Svu Materialu Pressure measuring probe arrangement for compacted material
DE2043140B2 (en) * 1970-08-31 1980-09-25 Agfa-Gevaert Ag, 5090 Leverkusen
DE2448325B2 (en) * 1974-10-10 1976-09-23 Hoechst Ag, 6000 Frankfurt PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2524701A1 (en) * 1975-06-04 1976-12-16 Hoechst Ag PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2607207A1 (en) * 1976-02-23 1977-09-01 Hoechst Ag PROCESS FOR THE PRODUCTION OF FLAT PRINTING FORMS WITH LASER BEAMS
DE2728858C2 (en) * 1977-06-27 1986-03-13 Hoechst Ag, 6230 Frankfurt Process for the production of planographic printing forms with laser beams
DE3040476A1 (en) * 1980-10-27 1982-06-03 Vsesojuznyj naučno-issledovatel'skij institut kompleksnych problem poligrafii, Moskva Offset printing plate based on chromium plated steel - has printing elements treated with higher unsatd. fatty acid and hydrophilised non-printing elements
DE3248178A1 (en) * 1982-12-27 1984-07-05 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt IMAGE COATING OF PRINTING FORMS FOR FLAT PRINTING

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Druck Print 10/1980, S. 633 bis 635 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339737A (en) * 1992-07-20 1994-08-23 Presstek, Inc. Lithographic printing plates for use with laser-discharge imaging apparatus
US5351617A (en) * 1992-07-20 1994-10-04 Presstek, Inc. Method for laser-discharge imaging a printing plate
US5353705A (en) * 1992-07-20 1994-10-11 Presstek, Inc. Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus
US5379698A (en) * 1992-07-20 1995-01-10 Presstek, Inc. Lithographic printing members for use with laser-discharge imaging
US5385092A (en) * 1992-07-20 1995-01-31 Presstek, Inc. Laser-driven method and apparatus for lithographic imaging
USRE35512E (en) * 1992-07-20 1997-05-20 Presstek, Inc. Lithographic printing members for use with laser-discharge imaging
DE20011699U1 (en) * 2000-07-07 2001-11-22 Web Tech Licensees B V Printing machine for printing on sheets or webs

Also Published As

Publication number Publication date
DE8706120U1 (en) 1988-05-26

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