EP1155871B1 - Method for treating re-usable printing plates or cylinders in printing machines - Google Patents

Method for treating re-usable printing plates or cylinders in printing machines Download PDF

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Publication number
EP1155871B1
EP1155871B1 EP01111023A EP01111023A EP1155871B1 EP 1155871 B1 EP1155871 B1 EP 1155871B1 EP 01111023 A EP01111023 A EP 01111023A EP 01111023 A EP01111023 A EP 01111023A EP 1155871 B1 EP1155871 B1 EP 1155871B1
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EP
European Patent Office
Prior art keywords
printing
layer
cylinders
treating
image information
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.)
Expired - Lifetime
Application number
EP01111023A
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German (de)
French (fr)
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EP1155871A2 (en
EP1155871A3 (en
Inventor
Arndt Jentzsch
Bernd Patzelt
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Publication of EP1155871A3 publication Critical patent/EP1155871A3/en
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Publication of EP1155871B1 publication Critical patent/EP1155871B1/en
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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
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes

Definitions

  • the invention relates to a method for treating reimageable printing forms or printing form cylinders in printing presses, wherein on the surface to be treated imageable layer applied and this layer with an imaging device an image information is applied to create printing and non-printing locations.
  • the device for printing plate imaging optionally contains an integrated curing device and a detachment device.
  • the curing of the applied on the pressure plate Medium is done by UV curing or radiation curing.
  • About the function of the Detachment device are not specified.
  • a method for regenerating a is preferred previously known directly illustrated printing form suitable for offset printing.
  • the regeneration the printing plate includes the removal of the images on the printing form and a hydrophilization of the surface of the printing form.
  • the Regeneration by applying an ionized process gas to the printing form by means of an application device is applied, with a reactive deletion of the images and the simultaneous hydrophilization is carried out in one process step.
  • the one there Volatile reaction products are removed by a suction device.
  • the invention has the advantage that the method according to the invention additionally Extinguishing devices are no longer required.
  • the device works reliably and energy-saving.
  • the accompanying drawing shows a printing unit 1 of a multi-color sheet-fed offset printing machine.
  • Each printing unit 1 contains a printing cylinder as a sheet-guiding cylinder 2 and a transfer cylinder 3 and a printing form cylinder as the image transfer cylinder 4 and a rubber cylinder 5.
  • An inking unit 6 and a dampening unit 7 are assigned to each printing form cylinder 4.
  • On the Printing form cylinder 4 can also be a printing form (not shown here).
  • the printing form cylinder 4 is also a chamber doctor blade / anilox roller combination executed coating device 8, an imaging device 9 and possibly a developer unit 10 assigned.
  • the imaging device 9 for imaging the printing form cylinder 4 is designed as a laser-based ablation device.
  • the applied layer 11 can now, depending on the printing process, ink-guiding or ink-repellent Have properties.
  • layer 11 is color-friendly and that Surface of the printing form cylinder 4 is dampening agent friendly.
  • a color or a color-like product can be used.
  • the medium is dampening agent friendly and the printing form cylinder 4 is color friendly.
  • the medium for layer 11 is usually self-curing. Is the hardening of the medium not automatically possible, curing with UV light can take place parallel to the coating (Polymerization) or via laser beam drying and baking. After a another variant, it is also possible to heat the medium onto the printing form cylinder 4 to apply and to achieve the solidification by cooling.
  • the printing form cylinder 4 prepared after the application of the medium can now be imaged by the imaging device 9.
  • data for the printing process are generally known manner processed and the device for printing cylinder imaging fed.
  • the speed of rotation of the printing form cylinder 4 is controlled by the line Speed of the imaging device 9 synchronized.
  • the surface of the layer is loaded with image information, so that there are printing and non-printing areas.
  • the Layer 11 is color-friendly or dampening agent-friendly, leads to the ablation of layer 11 printing or non-printing points on the surface of the printing form cylinder 4.
  • the imaging may be followed by a development process to open up the image information to fix the surface of the printing form cylinder 4 or the printing plate.
  • the printing process is then carried out. This can be done in a conventional manner Ink and water or in dry offset are done using the Toray process.
  • the imaging of the printing form cylinder 4 is removed. This happens also by means of a laser-based ablation device, preferably those for the Imaging device 9 used is used.
  • the Layer 11 according to the invention with the image formation inverted with respect to the imaging pressurized so that - depending on the printing process - the printing or non-printing Make the layer 11 eliminated.
  • An advantageous embodiment of the invention is the diameter of the laser beam to transmit the inverted image information. This can increase reliability the image separation can be enlarged.
  • the The diameter of the laser beam is retained, but the dot matrix of the inverted image information is specifically overcrowded, i.e. the number of points is increased.
  • the imaging, the hardening of the applied layer 11, the development and the image detachment should preferably be done with the printing plate cylinder 4 rotating. That is what Printing form cylinder 4 can be uncoupled from the drive and has for imaging and image detachment its own drive.
  • the method described above is not limited to offset printing.
  • the layer 11 is, as it were, in the form of a sleeve or a polymer plate.
  • the Image information is applied analogously to the imaging device 9 as described above.
  • the detachment or deletion process is also carried out with the inverted image information carried out, which then equalizes the surface of the sleeve or the polymer plate becomes.

Abstract

An illustration layer (11) is applied to the surface to be processed and this layer is loaded with picture data to produce printing and non-printing sites. To release the layer or equalize the surface it is then loaded by an illustration device (9) with the inverted picture data. The illustration device for illustrating the layer is identical with the illustration device for removing or equalizing the layer and can be designed as an ablation device on a laser basis.

Description

Die Erfindung betrifft ein Verfahren zum Behandeln von erneut bebilderbaren Druckformen oder Druckformzylindern in Druckmaschinen, wobei auf die zu behandelnde Oberfläche eine bebilderbare Schicht aufgebracht und diese Schicht durch eine Bebilderungseinrichtung mit einer Bildinformation beaufschlagt wird, um druckende und nichtdruckende Stellen zu erzeugen.The invention relates to a method for treating reimageable printing forms or printing form cylinders in printing presses, wherein on the surface to be treated imageable layer applied and this layer with an imaging device an image information is applied to create printing and non-printing locations.

Aus der Druckschrift DE 195 08 843 A1 ist ein Verfahren zur Bebilderung bzw. zur Bebilderung und Neutralisation einer Druckplatte eines Druckformzylinders einer Druckmaschine bekannt. Hierbei liegen die auf die Druckplatte aufzubringenden Druckbildinformationen in digitaler Form vor. Zur Verwendung der Druckplatte in der Druckmaschine wird ein die Druckbildinformationen tragendes Medium auf die Druckplatte aufgebracht und nach dem Druckprozess abgelöst.From the publication DE 195 08 843 A1 is a method for imaging or for imaging and neutralization of a printing plate of a printing form cylinder of a printing press known. Here, the print image information to be applied to the printing plate is in digital form. To use the printing plate in the printing press is a Medium carrying print image information is applied to the printing plate and after the Printing process replaced.

Die Einrichtung zur Druckplattenbebilderung enthält gegebenenfalls eine integrierte Aushärteeinrichtung und eine Ablöseeinrichtung. Die Aushärtung des auf die Druckplatte aufgebrachten Mediums erfolgt mittels UV-Härtung oder Strahlenhärtung. Über die Funktion der Ablöseeinrichtung werden keine näheren Ausführungen gemacht.The device for printing plate imaging optionally contains an integrated curing device and a detachment device. The curing of the applied on the pressure plate Medium is done by UV curing or radiation curing. About the function of the Detachment device are not specified.

Aus der Druckschrift DE 41 23 959 C1 ist ein Verfahren zur Regenerierung einer vorzugsweise vorher direkt bebilderten für den Offsetdruck geeigneten Druckform bekannt. Die Regenerierung der Druckplatte umfasst die Entfernung der Bebilderung auf der Druckform und eine Hydrophilierung der Oberfläche der Druckform. Gemäß dieser Druckschrift erfolgt die Regenerierung dadurch, dass auf die Druckform ein ionisiertes Prozessgas mittels einer Beaufschlagungseinrichtung aufgebracht wird, wobei ein reaktives Löschen der Bebilderung und die gleichzeitige Hydrophilierung in einem Prozessschritt vorgenommen wird. Die dabei entstehenden flüchtigen Reaktionsprodukte werden mittels einer Absaugvorrichtung abgeführt.From document DE 41 23 959 C1, a method for regenerating a is preferred previously known directly illustrated printing form suitable for offset printing. The regeneration the printing plate includes the removal of the images on the printing form and a hydrophilization of the surface of the printing form. According to this document, the Regeneration by applying an ionized process gas to the printing form by means of an application device is applied, with a reactive deletion of the images and the simultaneous hydrophilization is carried out in one process step. The one there Volatile reaction products are removed by a suction device.

Nachteilig an dieser Regenerierungseinrichtung ist der hohe technische Aufwand, der für die Regenerierung der Druckplatten betrieben werden muss.The disadvantage of this regeneration device is the high technical outlay required for the Regeneration of the printing plates must be operated.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, ein Verfahren zu schaffen, das für in der Druckmaschine bebilderte Druckformen oder für bebilderte Druckformzylinder eine schnelle und ohne großen Aufwand zu bewerkstelligende Wiederverwendung zur erneuten Bebilderung ermöglicht.Based on this prior art, it is an object of the invention to provide a method create that for illustrated printing forms in the printing press or for illustrated printing form cylinders fast and easy reuse for reimaging.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention the object is achieved by the features of claim 1.

Die Erfindung hat den Vorteil, dass durch das erfindungsgemäße Verfahren zusätzliche Löscheinrichtungen nicht mehr erforderlich sind. Die Einrichtung arbeitet funktionssicher und energiesparend.The invention has the advantage that the method according to the invention additionally Extinguishing devices are no longer required. The device works reliably and energy-saving.

Anhand eines Ausführungsbeispieles soll die Erfindung nachfolgend näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.

Die dazugehörige Zeichnung zeigt ein Druckwerk 1 einer Mehrfarben - Bogenoffsetrotationsdruckmaschine. Jedes Druckwerk 1 enthält als bogenführende Zylinder einen Druckzylinder 2 und einen Übergabezylinder 3 und als druckbildübertragende Zylinder einen Druckformzylinder 4 und einen Gummizylinder 5.The accompanying drawing shows a printing unit 1 of a multi-color sheet-fed offset printing machine. Each printing unit 1 contains a printing cylinder as a sheet-guiding cylinder 2 and a transfer cylinder 3 and a printing form cylinder as the image transfer cylinder 4 and a rubber cylinder 5.

Jedem Druckformzylinder 4 ist ein Farbwerk 6 und ein Feuchtwerk 7 zugeordnet. Auf dem Druckformzylinder 4 kann auch eine (hier nicht dargestellte Druckform) aufgespannt sein.An inking unit 6 and a dampening unit 7 are assigned to each printing form cylinder 4. On the Printing form cylinder 4 can also be a printing form (not shown here).

Dem Druckformzylinder 4 ist weiterhin eine als Kammerrakel/Rasterwalzen-Kombination ausgeführte Beschichtungseinrichtung 8, eine Bebilderungseinrichtung 9 und ggf. eine Entwickler-Einheit 10 zugeordnet. Die Bebilderungseinrichtung 9 zur Bebilderung des Druckformzylinders 4 ist als eine Ablations- Einrichtung auf Laser-Basis ausgeführt.The printing form cylinder 4 is also a chamber doctor blade / anilox roller combination executed coating device 8, an imaging device 9 and possibly a developer unit 10 assigned. The imaging device 9 for imaging the printing form cylinder 4 is designed as a laser-based ablation device.

Das erfindungsgemäße Verfahren wird wie folgt realisiert:The method according to the invention is implemented as follows:

Bei abgestelltem Druck und abgestelltem Farb- und Feuchtwerk 6; 7 wird durch die Beschichtungseinrichtung 8 ein Medium auf die Oberfläche des Druckformzylinder 4 oder - falls mit einer Druckplatte gearbeitet wird - dieses Medium auf die Oberfläche der Druckplatte aufgebracht. Dadurch wird eine Schicht 11 gebildet. Diese kann auch durch andere Einrichtungen erzeugt werden, beispielsweise nach dem Ink-Jet-Prinzip. With the print off and the ink and dampening unit 6 off; 7 is through the coating device 8 a medium on the surface of the printing form cylinder 4 or - if working with a printing plate - this medium on the surface of the printing plate applied. A layer 11 is thereby formed. This can also be done by other institutions are generated, for example according to the ink jet principle.

Die aufgebrachte Schicht 11 kann nun, je nach Druckverfahren, farbführende oder farbabweisende Eigenschaften aufweisen. In einem Fall ist die Schicht 11 farbfreundlich und die Oberfläche des Druckformzylinder 4 feuchtmittelfreundlich. Als Medium kann eine Farbe oder ein farbähnliches Produkt verwendet werden. In einem andern Fall ist das Medium feuchtmittelfreundlich und der Druckformzylinder 4 ist farbfreundlich.The applied layer 11 can now, depending on the printing process, ink-guiding or ink-repellent Have properties. In one case, layer 11 is color-friendly and that Surface of the printing form cylinder 4 is dampening agent friendly. A color or a color-like product can be used. In another case, the medium is dampening agent friendly and the printing form cylinder 4 is color friendly.

Das Medium für die Schicht 11 ist in der Regel selbsthärtend. Ist die Aushärtung des Mediums nicht selbsttätig möglich, kann parallel zur Beschichtung die Aushärtung über UV-Licht (Polymerisation) oder über eine Laserstrahltrocknung und Einbrennen erfolgen. Nach einer anderen Variante ist es auch möglich, das Medium zu erhitzen, auf den Druckformzylinder 4 aufzubringen und die Verfestigung durch Kühlung zu erreichen.The medium for layer 11 is usually self-curing. Is the hardening of the medium not automatically possible, curing with UV light can take place parallel to the coating (Polymerization) or via laser beam drying and baking. After a another variant, it is also possible to heat the medium onto the printing form cylinder 4 to apply and to achieve the solidification by cooling.

Der nach dem Aufbringen des Mediums präparierte Druckformzylinder 4 kann nunmehr durch die Bebilderungseinrichtung 9 bebildert werden.The printing form cylinder 4 prepared after the application of the medium can now be imaged by the imaging device 9.

Dabei werden in einem nicht dargestellten Rechner Daten für den Druckprozess in allgemein bekannter Art und Weise aufbereitet und der Einrichtung zur Druckformzylinder-Bebilderung zugeleitet. Die Rotationsgeschwindigkeit des Druckformzylinders 4 wird mit der zeilengesteuerten Geschwindigkeit der Bebilderungseinrichtung 9 synchronisiert. Im Ergebnis des Bebilderungsprozesses wird die Oberfläche der Schicht mit einer Bildinformation beaufschlagt, so dass druckende und nichtdruckende Stellen entstehen. Je nachdem, ob die Schicht 11 farbfreundlich oder feuchtmittelfreundlich ist, führt die Ablation der Schicht 11 zu druckenden oder nichtdruckenden Stellen auf der Oberfläche des Druckformzylinders 4.In a computer, not shown, data for the printing process are generally known manner processed and the device for printing cylinder imaging fed. The speed of rotation of the printing form cylinder 4 is controlled by the line Speed of the imaging device 9 synchronized. As a result of Imaging process, the surface of the layer is loaded with image information, so that there are printing and non-printing areas. Depending on whether the Layer 11 is color-friendly or dampening agent-friendly, leads to the ablation of layer 11 printing or non-printing points on the surface of the printing form cylinder 4.

An die Bebilderung schließt sich ggf. ein Entwicklungsvorgang an, um die Bildinformation auf der Oberfläche des Druckformzylinders 4 bzw. der Druckplatte zu fixieren.The imaging may be followed by a development process to open up the image information to fix the surface of the printing form cylinder 4 or the printing plate.

Nachfolgend wird der Druckprozess vollzogen. Dieser kann auf konventionelle Art mittels Farbe und Wasser oder im Trockenoffset nach dem Toray-Verfahren erfolgen.The printing process is then carried out. This can be done in a conventional manner Ink and water or in dry offset are done using the Toray process.

Nach dem Druckvorgang wird die Bebilderung des Druckformzylinder 4 entfernt. Dies erfolgt ebenfalls durch eine Ablations-Einrichtung auf Laser-Basis, wobei vorzugsweise die für die Bebilderung verwendete Bebilderungseinrichtung 9 zur Anwendung kommt. Dabei wird die Schicht 11 erfindungsgemäß mit der gegenüber der Bebilderung invertierten Bildformation beaufschlagt, so dass - je nach Druckverfahren - die druckenden bzw. nichtdruckenden Stellen der Schicht 11 beseitigt werden.After the printing process, the imaging of the printing form cylinder 4 is removed. this happens also by means of a laser-based ablation device, preferably those for the Imaging device 9 used is used. The Layer 11 according to the invention with the image formation inverted with respect to the imaging pressurized so that - depending on the printing process - the printing or non-printing Make the layer 11 eliminated.

Eine vorteilhafte Ausführung der Erfindung besteht darin, den Durchmesser des LaserStrahls zum Übermitteln der invertierten Bildinformation zu vergrößern. Damit kann die Zuverlässigkeit der Bildablösung vergrößert werden. In einer anderen Ausführung wird der Durchmesser des Laser-Strahles beibehalten, aber die Punktmatrix der invertierten Bildinformation wird gezielt überfüllt, also die Anzahl der Punkte vergrößert.An advantageous embodiment of the invention is the diameter of the laser beam to transmit the inverted image information. This can increase reliability the image separation can be enlarged. In another version, the The diameter of the laser beam is retained, but the dot matrix of the inverted image information is specifically overcrowded, i.e. the number of points is increased.

Die Bebilderung, das Aushärten der aufgetragenen Schicht 11, das Entwickeln und die Bildablösung sollten vorzugsweise bei rotierendem Druckformzylinder 4 erfolgen. Dafür ist der Druckformzylinder 4 vom Antrieb abkuppelbar und weist für die Bebilderung und Bildablösung einen eigenen Antrieb auf.The imaging, the hardening of the applied layer 11, the development and the image detachment should preferably be done with the printing plate cylinder 4 rotating. That is what Printing form cylinder 4 can be uncoupled from the drive and has for imaging and image detachment its own drive.

Das oben beschriebene Verfahren beschränkt sich nicht auf den Offsetdruck. Beim FlexoDruck liegt die Schicht 11 gleichsam in Form eines Sleeves oder einer Polymerplatte vor. Die Bildinformation wird analog wie oben beschrieben mit der Bebilderungseinrichtung 9 aufgebracht. Der Ablöse- bzw. Löschvorgang wird ebenso mit der invertierten Bildinformation durchgeführt, wobei dann damit die Oberfläche des Sleeves oder der Polymerplatte egalisiert wird. The method described above is not limited to offset printing. With flexographic printing the layer 11 is, as it were, in the form of a sleeve or a polymer plate. The Image information is applied analogously to the imaging device 9 as described above. The detachment or deletion process is also carried out with the inverted image information carried out, which then equalizes the surface of the sleeve or the polymer plate becomes.

Aufstellung der verwendeten BezugszeichenList of the reference numerals used

11
Druckwerkprinting unit
22
Druckzylinderpressure cylinder
33
ÜbergabezylinderTransfer cylinder
44
DruckformzylinderPlate cylinder
55
Gummizylinderrubber cylinder
66
Farbwerkinking
77
Feuchtwerkdampening
88th
Beschichtungseinrichtungcoater
99
Bebilderungseinrichtungimaging
1010
Entwickler-EinheitDeveloper unit
1111
Schichtlayer

Claims (7)

  1. Method of treating printing formes or printing forme cylinders, to which images can be reapplied, in printing machines, wherein a layer (11) to which an image can be applied is coated on the surface to be treated and this layer (11) is acted on by imaging equipment (9) with image information in order to produce printing and non-printing locations, characterised in that for detaching the layer (11) or for equalising the surface this is acted on by imaging equipment (9) with the inverse image information.
  2. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claim 1, characterised in that the imaging equipment (9) for imaging the layer (11) is identical with the imaging equipment (9) for detaching or equalising the layer (11).
  3. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claims 1 and 2, characterised in that the imaging equipment (9) is constructed as ablation equipment on a laser basis.
  4. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claim 1, characterised in that the image information for producing printing locations arranged on the surface of the printing forme or of the printing forme cylinder (4) leads.
  5. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claim 1, characterised in that the image information for producing non-printing locations arranged on the surface of the printing forme or of the printing forme cylinder (4) leads.
  6. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claims 1 and 2, characterised in that in the case of the inverse image information the diameter of the laser beam is increased.
  7. Method of treating printing formes or printing cylinders, to which images can be reapplied, according to claims 1 and 2, characterised in that the dot matrix of the inverse image information is selectively overfilled.
EP01111023A 2000-05-15 2001-05-08 Method for treating re-usable printing plates or cylinders in printing machines Expired - Lifetime EP1155871B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024184A DE10024184A1 (en) 2000-05-15 2000-05-15 Process for treating reimageable printing forms or printing form cylinders in printing machines
DE10024184 2000-05-15

Publications (3)

Publication Number Publication Date
EP1155871A2 EP1155871A2 (en) 2001-11-21
EP1155871A3 EP1155871A3 (en) 2003-08-20
EP1155871B1 true EP1155871B1 (en) 2004-08-11

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EP (1) EP1155871B1 (en)
AT (1) ATE273141T1 (en)
DE (2) DE10024184A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005815A1 (en) * 2007-02-06 2008-08-07 Maschinenfabrik Wifag Method for illustrating printing plate in offset printing machine, involves applying thermosetting coating material on hydrophobic surface of printing plate, in which coating material is hardened by irradiation or drying process
EP2269834A1 (en) 2009-06-30 2011-01-05 WIFAG Maschinenfabrik AG Method and device for modifying the print image of a printing plate
US8318406B2 (en) * 2010-02-03 2012-11-27 Eastman Kodak Company Method for fixing a flexographic plate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729310A (en) * 1982-08-09 1988-03-08 Milliken Research Corporation Printing method
JP2000015770A (en) * 1998-06-30 2000-01-18 Think Laboratory Co Ltd Method for reusing printing plate

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EP1155871A2 (en) 2001-11-21
DE50103183D1 (en) 2004-09-16
ATE273141T1 (en) 2004-08-15
DE10024184A1 (en) 2001-11-22
EP1155871A3 (en) 2003-08-20

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