EP1918121A2 - Method for erasing a printing plate - Google Patents

Method for erasing a printing plate Download PDF

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Publication number
EP1918121A2
EP1918121A2 EP07020178A EP07020178A EP1918121A2 EP 1918121 A2 EP1918121 A2 EP 1918121A2 EP 07020178 A EP07020178 A EP 07020178A EP 07020178 A EP07020178 A EP 07020178A EP 1918121 A2 EP1918121 A2 EP 1918121A2
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EP
European Patent Office
Prior art keywords
printing
erasing
main
during
cylinder
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.)
Granted
Application number
EP07020178A
Other languages
German (de)
French (fr)
Other versions
EP1918121B1 (en
EP1918121A3 (en
Inventor
Horst Dauer
Peer Dilling
Andreas Dr. Feil
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.)
Manroland AG
Original Assignee
Manroland AG
MAN Roland Druckmaschinen AG
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Publication date
Application filed by Manroland AG, MAN Roland Druckmaschinen AG filed Critical Manroland AG
Publication of EP1918121A2 publication Critical patent/EP1918121A2/en
Publication of EP1918121A3 publication Critical patent/EP1918121A3/en
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Publication of EP1918121B1 publication Critical patent/EP1918121B1/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 erasing a printing form according to the preamble of claim 1.
  • the present invention relates to a method of erasing a permanent image on a surface of such a rewritable printing form.
  • DICOweb digital printing machines that work with rewritable and erasable printing plates.
  • a printing master base cylinder is preferably subjected to an erasing step or a deposing step and to a subsequent imaging step.
  • the fundamentals of DICOweb technology are in " Handbuch der Printmedien, Helmut Kipphan, pages 674 to 680, year 2000, Springer-Verlag "described.
  • the extinguishing device according to the DE 100 08 214 A1 comprises a cleaning cloth, wherein the cleaning cloth is unwound from a Frischischtuchrolle, is pressed by a pressing member against the surface to be erased the printing plate and then a spent cleaning cloth is wound on a dirty cloth roll.
  • the present invention is based on the problem to provide a novel method for erasing a printing form.
  • the erasing is carried out in two main erasing steps, wherein a first main erasing step is performed during a run out of the forme cylinder after the completion of a printing job, and then followed by a second main erasing step for which the forme cylinder is driven after it has run out.
  • the present invention it is proposed to carry out the erasing in two main erasing steps, wherein the first main erasing step is carried out during the expiration of the forme cylinder and thus during the run out of the printing machine after the end of a printing job.
  • the first main extinguishing step therefore takes place in parallel with the already required run-out of the forme cylinder, as a result of which the required changeover time can be reduced by the time required for the forging cylinder to expire and during which the first main extinguishing step is carried out.
  • a cleaning of the surface of the rewritable printing form is carried out during the first main quenching step, whereby printing ink and imaging polymer are removed from the surface and the surface is preferably dried, and during the second main quenching step a cleaning of the first main quenching step cleaned surface of the rewritable printing form is carried out, in which case residual impurities are removed from the surface.
  • the present invention relates to printing processes that work with erasable and rewritable printing forms.
  • the invention relates to a method for erasing such a rewritable printing form.
  • the deletion of a surface of a rewritable printing form takes place within the printing press, namely in two main extinguishing steps.
  • a first main erasing step is performed during the running out of the forme cylinder on which the printing form to be erased is positioned. Accordingly, the first main erase step takes place during the run-out of the printing machine after the completion of a print job during a process time which is required anyway.
  • the same initially still rotates at a high peripheral speed, so that during the first main quenching step an effective cleaning of the surface of the rewritable printing form can take place.
  • the first main quenching step which is performed in parallel with the printing machine run out or the form cylinder on which the printing form to be cleaned is positioned, printing ink and imaging polymer are removed from the surface.
  • At least one color-dissolving cleaning agent and then at least one polymer-dissolving cleaning agent are first applied to the surface of the printing form by means of a first erasing device and, in turn, removed therefrom.
  • drying of the cleaned surface of the rewritable printing form also takes place.
  • the second main extinguishing step is carried out.
  • the surface of the rewritable printing form pre-cleaned during the first main erasing step is cleaned, thereby removing residual impurities from the surface of the printing form.
  • CO 2 snow can also be used for the main quenching steps.
  • Removal of the residual contaminants from the surface of the printing form occurs during the second main quenching step using a second quenching device, for example, by means of which an atmospheric plasma is directed onto the surface of the printing form to be cleaned so as to remove residual impurities from the surface through the imaging polymer.
  • a second quenching device for example, by means of which an atmospheric plasma is directed onto the surface of the printing form to be cleaned so as to remove residual impurities from the surface through the imaging polymer.
  • the forme cylinder is actively driven after it has been discharged during the second main extinguishing step.
  • the atmospheric plasma which is an ionized gas, is directed at a defined distance to the surface of the printing forme to be cleaned.
  • the cylinder surface is freed of residual impurities and further conditioned so as to ensure optimal adhesion for the applied Becularungspolymer and a corresponding hydrophilicity for a good freewheeling behavior for printing start a new print job in the subsequent reimaging the deleted printing form.
  • the surface of the printing form is cleaned to a degree of approximately at least 95%, in particular to a degree of approximately at least 98%.
  • the second main quenching step in which the cleaning of the surface of the printing form precleaned during the first main quenching step takes place, the residual contaminants remaining from the surface of the printing form are removed after completion of the first main quenching step, still a maximum of 5%, in particular the remaining maximum of 2%.
  • a first main erasing step of the erasing method according to the invention is carried out in parallel to the already occurring leakage of a printing press after completion of a print job.
  • the forme cylinder need not be driven.
  • cleaning of the precut printing form and conditioning of the surface of the printing form in a second main quenching step is followed by cleaning of the precut printing form and conditioning of the surface of the printing form in a second main quenching step.
  • the forme cylinder is actively driven.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The method involves moving a form cylinder that carries a printing form during erasing. A main erasing step is executed during running out of the form cylinder after the completion of a printing order, and another main erasing step is executed for which the form cylinder is driven after the running out of the form cylinder. A surface of the printing form is erased during the former main clearing step. Printing ink and pictorial polymer are removed from the surface of the printing form, where the cylinder rotates with a high peripheral speed during running out of the cylinder.

Description

Die Erfindung betrifft ein Verfahren zum Löschen einer Druckform gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for erasing a printing form according to the preamble of claim 1.

Beim Drucken mit einer Druckform wird prinzipiell zwischen Verfahren unterschieden, die auf der einen Seite mit einer einmal beschreibbaren Druckform oder auf der anderen Seite mit einer wiederbeschreibbaren Druckform arbeiten. Druckverfahren, die wiederbeschreibbare Druckformen verwenden, werden auch unter dem Schlagwort "computer to press / direct imaging" zusammengefasst. Die hier vorliegende Erfindung betrifft ein Verfahren zum Löschen eines permanenten Bilds auf einer Oberfläche einer derartigen wiederbeschreibbaren Druckform.In principle, when printing with a printing form, a distinction is made between methods which use a write-once printing form on one side or a rewritable printing form on the other side. Printing methods using rewritable printing forms are also summarized under the keyword "computer to press / direct imaging". The present invention relates to a method of erasing a permanent image on a surface of such a rewritable printing form.

Die Anmelderin vertreibt unter der Produktbezeichnung "DICOweb" digitale Druckmaschinen, die mit wiederbeschreibbaren sowie löschbaren Druckformen arbeiten. Bei der Herstellung derartiger Druckformen wird vorzugsweise ein Druckformgrundzylinder einem Löschschritt bzw. Entbilderungsschritt sowie einem nachfolgenden Bebilderungsschritt unterzogen. Die Grundzüge der DICOweb-Technologie sind in " Handbuch der Printmedien, Helmut Kipphan, Seiten 674 bis 680, Jahr 2000, Springer-Verlag " beschrieben.The applicant sells under the product name "DICOweb" digital printing machines that work with rewritable and erasable printing plates. In the production of such printing plates, a printing master base cylinder is preferably subjected to an erasing step or a deposing step and to a subsequent imaging step. The fundamentals of DICOweb technology are in " Handbuch der Printmedien, Helmut Kipphan, pages 674 to 680, year 2000, Springer-Verlag "described.

Eine beim Löschen einer wiederbeschreibbaren Druckform verwendbare Löschvorrichtung ist in der DE 100 08 214 A1 offenbart. Die Löschvorrichtung gemäß der DE 100 08 214 A1 umfasst ein Reinigungstuch, wobei das Reinigungstuch von einer Frischtuchrolle abgewickelt wird, über ein Anpresselement gegen die zu löschende Oberfläche der Druckform gedrückt wird und sodann ein verbrauchtes Reinigungstuch auf einer Schmutztuchrolle aufgewickelt wird.An erase apparatus usable in erasing a rewritable printing form is disclosed in U.S.P. DE 100 08 214 A1 disclosed. The extinguishing device according to the DE 100 08 214 A1 comprises a cleaning cloth, wherein the cleaning cloth is unwound from a Frischischtuchrolle, is pressed by a pressing member against the surface to be erased the printing plate and then a spent cleaning cloth is wound on a dirty cloth roll.

Bei aus der Praxis bekannten Druckmaschinen, die wiederbeschreibbare Druckformen zum Drucken verwenden, erfolgt das Löschen einer Druckform als völlig eigenständiger Arbeitsschritt während eines Umrüstvorgangs an der Druckmaschine. Es besteht ein Bedarf an Löschverfahren für wiederbeschreibbare Druckformen, mit Hilfe derer die benötigte Umrüstzeit reduziert werden kann.When known from practice printing machines that use rewritable printing forms for printing, the deletion of a printing form is carried out as a completely separate step during a conversion process on the press. There is a need for erasure methods for rewritable printing forms which can reduce the required changeover time.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde, ein neuartiges Verfahren zum Löschen einer Druckform zu schaffen.On this basis, the present invention is based on the problem to provide a novel method for erasing a printing form.

Dieses Problem wird durch ein Verfahren gemäß Anspruch 1 gelöst.This problem is solved by a method according to claim 1.

Erfindungsgemäß erfolgt das Löschen in zwei Hauptlöschschritten, wobei ein erster Hauptlöschschritt während eines Auslaufens des Formzylinders nach Beendigung eines Druckauftrags durchgeführt wird, und wobei anschließend hieran ein zweiter Hauptlöschschritt durchgeführt wird, für den der Formzylinder nach dem Auslaufen desselben angetrieben wird.According to the invention, the erasing is carried out in two main erasing steps, wherein a first main erasing step is performed during a run out of the forme cylinder after the completion of a printing job, and then followed by a second main erasing step for which the forme cylinder is driven after it has run out.

Mit der hier vorliegenden Erfindung wird vorgeschlagen, das Löschen in zwei Hauptlöschschritten durchzuführen, wobei der erste Hauptlöschschritt während des Auslaufens des Formzylinders und damit während des Auslaufens der Druckmaschine nach Beendigung eines Druckauftrags durchgeführt wird. Der erste Hauptlöschschritt erfolgt demnach parallelisiert zum ohnehin erforderlichen Auslaufen des Formzylinders, wodurch die benötigte Umrüstzeit um die Zeit verringert werden kann, die zum Auslaufen des Formzylinders benötigt und während derer der erste Hauptlöschschritt durchgeführt wird.With the present invention, it is proposed to carry out the erasing in two main erasing steps, wherein the first main erasing step is carried out during the expiration of the forme cylinder and thus during the run out of the printing machine after the end of a printing job. The first main extinguishing step therefore takes place in parallel with the already required run-out of the forme cylinder, as a result of which the required changeover time can be reduced by the time required for the forging cylinder to expire and during which the first main extinguishing step is carried out.

Da sich während des Auslaufens des Formzylinders derselbe mit einer hohen Umfangsgeschwindigkeit dreht, kann eine auf demselben positionierte Druckform effektiv und innerhalb kurzer Zeit im ersten Hauptlöschschritt gesäubert werden.Since the same rotates at a high peripheral speed during the expiration of the forme cylinder, a printing forme positioned thereon can be cleaned effectively and within a short time in the first main extinguishing step.

Nach einer vorteilhaften Weiterbildung der hier vorliegenden Erfindung wird während des ersten Hauptlöschschritts ein Säubern der Oberfläche der wiederbeschreibbaren Druckform durchgeführt, wobei hierbei Druckfarbe und Bebilderungspolymer von der Oberfläche entfernt und die Oberfläche vorzugsweise getrocknet wird, und wobei während des zweiten Hauptlöschschritts ein Reinigen der im ersten Hauptlöschschritt gesäuberten Oberfläche der wiederbeschreibbaren Druckform durchgeführt wird, wobei hierbei Restverunreinigungen von der Oberfläche entfernt werden.According to an advantageous development of the present invention, a cleaning of the surface of the rewritable printing form is carried out during the first main quenching step, whereby printing ink and imaging polymer are removed from the surface and the surface is preferably dried, and during the second main quenching step a cleaning of the first main quenching step cleaned surface of the rewritable printing form is carried out, in which case residual impurities are removed from the surface.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Die hier vorliegende Erfindung betrifft Druckverfahren, die mit löschbaren sowie wiederbeschreibbaren Druckformen arbeiten. Im Detail betrifft die Erfindung ein Verfahren zum Löschen einer solchen wiederbeschreibbaren Druckform.Preferred embodiments of the invention will become apparent from the dependent claims and the description below. The present invention relates to printing processes that work with erasable and rewritable printing forms. In detail, the invention relates to a method for erasing such a rewritable printing form.

Im Sinne der hier vorliegenden Erfindung erfolgt das Löschen einer Oberfläche einer wiederbeschreibbaren Druckform innerhalb der Druckmaschine, und zwar in zwei Hauptlöschschritten. Ein erster Hauptlöschschritt wird während des Auslaufens des Formzylinders, auf welchem die zu löschende Druckform positioniert ist, durchgeführt. Der erste Hauptlöschschritt erfolgt demnach während des Auslaufens der Druckmaschine nach Beendigung eines Druckauftrags während einer ohnehin erforderlichen Prozesszeit. Während des Auslaufens des Formzylinders dreht sich derselbe anfänglich noch mit einer hohen Umfangsgeschwindigkeit, so dass während des ersten Hauptlöschschritts ein effektives Säubern der Oberfläche der wiederbeschreibbaren Druckform erfolgen kann.For the purposes of the present invention, the deletion of a surface of a rewritable printing form takes place within the printing press, namely in two main extinguishing steps. A first main erasing step is performed during the running out of the forme cylinder on which the printing form to be erased is positioned. Accordingly, the first main erase step takes place during the run-out of the printing machine after the completion of a print job during a process time which is required anyway. During the expiration of the forme cylinder, the same initially still rotates at a high peripheral speed, so that during the first main quenching step an effective cleaning of the surface of the rewritable printing form can take place.

Während des ersten Hauptlöschschritts, der parallelisiert zum Auslaufen der Druckmaschine bzw. zum Auslaufen des Formzylinders, auf welcher die zu reinigende Druckform positioniert ist, durchgeführt wird, wird Druckfarbe und Bebilderungspolymer von der Oberfläche entfernt.During the first main quenching step, which is performed in parallel with the printing machine run out or the form cylinder on which the printing form to be cleaned is positioned, printing ink and imaging polymer are removed from the surface.

Hierzu wird zuerst mindestens ein farblösendes Reinigungsmittel und anschließend mindestens ein polymerlösendes Reinigungsmittel mit Hilfe einer ersten Löschvorrichtung auf die Oberfläche der Druckform aufgetragen und von derselben wiederum entfernt. Vorzugsweise erfolgt während des ersten Hauptlöschschritts auch ein Trocknen der gesäuberten Oberfläche der wiederbeschreibbaren Druckform.For this purpose, at least one color-dissolving cleaning agent and then at least one polymer-dissolving cleaning agent are first applied to the surface of the printing form by means of a first erasing device and, in turn, removed therefrom. Preferably, during the first main quenching step, drying of the cleaned surface of the rewritable printing form also takes place.

Im Anschluss an den ersten Hauptlöschschritt und damit im Anschluss an das Auslaufen des Formzylinders wird der zweite Hauptlöschschritt durchgeführt. Während des zweiten Hauptlöschschritts wird die während des ersten Hauptlöschschritts vorgesäuberte Oberfläche der wiederbeschreibbaren Druckform gereinigt, wobei hierbei von der Oberfläche der Druckform Restverunreinigungen entfernt werden. Für die Hauptlöschschritte kann auch CO2- Schnee verwendet werden.Subsequent to the first main extinguishing step and thus subsequent to the expiry of the forme cylinder, the second main extinguishing step is carried out. During the second main erase step, the surface of the rewritable printing form pre-cleaned during the first main erasing step is cleaned, thereby removing residual impurities from the surface of the printing form. CO 2 snow can also be used for the main quenching steps.

Das Entfernen der Restverunreinigungen von der Oberfläche der Druckform erfolgt während des zweiten Hauptlöschschritts unter Verwendung einer zweiten Löschvorrichtung, mit Hilfe derer zum Beispiel ein atmosphärisches Plasma auf die Oberfläche der zu reinigenden Druckform gerichtet wird, um so Restverunreinigungen durch das Bebilderungspolymer von der Oberfläche zu entfernen. Hierzu wird der Formzylinder nach dem Auslaufen desselben während des zweiten Hauptlöschschritts aktiv angetrieben.Removal of the residual contaminants from the surface of the printing form occurs during the second main quenching step using a second quenching device, for example, by means of which an atmospheric plasma is directed onto the surface of the printing form to be cleaned so as to remove residual impurities from the surface through the imaging polymer. For this purpose, the forme cylinder is actively driven after it has been discharged during the second main extinguishing step.

Das atmosphärische Plasma, bei welchem es sich um ein ionisiertes Gas handelt, wird in einem definierten Abstand auf die zu reinigende Oberfläche der Druckform gerichtet. Hierdurch wird die Zylinderoberfläche von Restverunreinigungen befreit und weiterhin konditioniert, um so bei der nachfolgenden Neubebilderung der gelöschten Druckform eine optimale Haftung für das aufzutragende Bebilderungspolymer sowie eine entsprechende Hydrophilie für ein gutes Freilaufverhalten zum Druckstart eines neuen Druckauftrags zu gewährleisten.The atmospheric plasma, which is an ionized gas, is directed at a defined distance to the surface of the printing forme to be cleaned. As a result, the cylinder surface is freed of residual impurities and further conditioned so as to ensure optimal adhesion for the applied Bebilderungspolymer and a corresponding hydrophilicity for a good freewheeling behavior for printing start a new print job in the subsequent reimaging the deleted printing form.

Während des ersten Hauptlöschschritts, der parallelisiert zum Auslaufen des Formzylinders durchgeführt wird, erfolgt die Säuberung der Oberfläche der Druckform bis zu einem Grad von in etwa minimal 95%, insbesondere bis zu einem Grad von in etwa minimal 98%. Während des zweiten Hauptlöschschritts, in welchem die Reinigung der während des ersten Hauptlöschschritts vorgesäuberten Oberfläche der Druckform erfolgt, werden die nach Beendigung des ersten Hauptlöschschritts noch verbliebenen maximal 5%, insbesondere die noch verbliebenen maximal 2%, Restverunreinigungen von der Oberfläche der Druckform entfernt.During the first main quenching step, which is performed in parallel with the expiration of the forme cylinder, the surface of the printing form is cleaned to a degree of approximately at least 95%, in particular to a degree of approximately at least 98%. During the second main quenching step, in which the cleaning of the surface of the printing form precleaned during the first main quenching step takes place, the residual contaminants remaining from the surface of the printing form are removed after completion of the first main quenching step, still a maximum of 5%, in particular the remaining maximum of 2%.

Mit dem erfindungsgemäßen Verfahren zum Löschen einer Druckform kann die zum Löschen benötigte Zeit deutlich reduziert werden. Ein erster Hauptlöschschritt des erfindungsgemäßen Löschverfahrens wird parallelisiert zum ohnehin erfolgenden Auslaufen einer Druckmaschine nach Beendigung eines Druckauftrags durchgeführt. Für den ersten Hauptlöschschritt muss der Formzylinder nicht angetrieben werden. Nach der Vorsäuberung der Druckform während des ersten Hauptlöschschritts erfolgt anschließend hieran in einem zweiten Hauptlöschschritt eine Reinigung der vorgesäuberten Druckform sowie eine Konditionierung der Oberfläche der Druckform. Für den zweiten Hauptlöschschritt wird der Formzylinder aktiv angetrieben.With the method according to the invention for erasing a printing form, the time required for erasing can be significantly reduced. A first main erasing step of the erasing method according to the invention is carried out in parallel to the already occurring leakage of a printing press after completion of a print job. For the first main extinguishing step, the forme cylinder need not be driven. Following the pre-cleaning of the printing form during the first main quenching step, this is followed by cleaning of the precut printing form and conditioning of the surface of the printing form in a second main quenching step. For the second main extinguishing step, the forme cylinder is actively driven.

Claims (6)

Verfahren zum Löschen einer Oberfläche einer wiederbeschreibbaren Druckform innerhalb einer Druckmaschine, wobei beim Löschen ein die Druckform tragender Formzylinder drehend bewegt wird, dadurch gekennzeichnet, dass das Löschen in zwei Hauptlöschschritten erfolgt, wobei ein erster Hauptlöschschritt während eines Auslaufens des Formzylinders nach Beendigung eines Druckauftrags durchgeführt wird, und wobei anschließend hieran ein zweiter Hauptlöschschritt durchgeführt wird, für den der Formzylinder nach dem Auslaufen desselben angetrieben wird.A method of erasing a surface of a rewritable printing form within a printing machine, wherein upon erasing, a printing cylinder carrying the form cylinder is rotationally moved, characterized in that erasing is performed in two main erasing steps, wherein a first main erasing step is performed during a run out of the form cylinder after completion of a printing job , and then followed by a second Hauptlöschschritt is performed, for which the forme cylinder is driven after its expiry. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass während des ersten Hauptlöschschritts ein Säubern der Oberfläche der wiederbeschreibbaren Druckform durchgeführt wird, wobei hierbei Druckfarbe und Bebilderungspolymer von der Oberfläche entfernt und die Oberfläche vorzugsweise getrocknet wird.A method according to claim 1, characterized in that during the first main quenching step a cleaning of the surface of the rewritable printing form is carried out, wherein in this case printing ink and imaging polymer removed from the surface and the surface is preferably dried. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass hierzu über eine erste Löschvorrichtung zuerst mindestens ein farblösendes Reinigungsmittel und anschließend mindestens ein polymerlösendes Reinigungsmittel auf die Druckform aufgetragen und von derselben wiederum entfernt wird.Method according to claim 2, characterized in that for this purpose at least one paint-dissolving cleaning agent and then at least one polymer-dissolving cleaning agent are first applied to the printing form and removed therefrom via a first extinguishing device. Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass während des zweiten Hauptlöschschritts ein Reinigen der gesäuberten Oberfläche der wiederbeschreibbaren Druckform durchgeführt wird, wobei hierbei Restverunreinigungen von der Oberfläche entfernt werden.Method according to one or more of claims 1 to 3, characterized in that during the second main quenching step, a cleaning of the cleaned surface of the rewritable printing form is carried out, whereby residual impurities are removed from the surface. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass hierzu über eine zweite Löschvorrichtung ein atmosphärisches Plasma auf die Oberfläche gerichtet wird, um so Restverunreinigungen durch das Bebilderungspolymer von der Oberfläche zu entfernen.A method according to claim 4, characterized in that for this purpose an atmospheric plasma is directed onto the surface via a second erasing device so as to remove residual impurities from the surface by the imaging polymer. Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass während des ersten Hauptlöschschritts die Oberfläche zu einem Grad von minimal in etwa 95%, insbesondere zu einem Grad von minimal in etwa 98%, gesäubert wird, und dass während des zweiten Hauptlöschschritts die verbleibenden maximal 5%, insbesondere die verbleibenden maximal 2%, Restverunreinigungen von der Oberfläche zu entfernt werden.Method according to one or more of claims 1 to 5, characterized in that during the first main quenching step the surface is cleaned to a degree of at least about 95%, in particular to a degree of at least about 98%, and that during the second main quenching step Hauptlöschschritts the remaining maximum of 5%, in particular the remaining maximum of 2%, residual impurities from the surface to be removed.
EP07020178A 2006-10-18 2007-10-16 Method for erasing a printing plate Not-in-force EP1918121B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006049149A DE102006049149A1 (en) 2006-10-18 2006-10-18 Rewritable printing form's surface erasing method for printing machine i.e. digital printing machine, involves executing main erasing step during running out of form cylinder after completion of printing order

Publications (3)

Publication Number Publication Date
EP1918121A2 true EP1918121A2 (en) 2008-05-07
EP1918121A3 EP1918121A3 (en) 2009-04-15
EP1918121B1 EP1918121B1 (en) 2011-05-18

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EP07020178A Not-in-force EP1918121B1 (en) 2006-10-18 2007-10-16 Method for erasing a printing plate

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US (1) US20080098919A1 (en)
EP (1) EP1918121B1 (en)
JP (1) JP2008100516A (en)
CN (1) CN101164779A (en)
AT (1) ATE509775T1 (en)
CA (1) CA2606944A1 (en)
DE (1) DE102006049149A1 (en)

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CA2606944A1 (en) 2008-04-18
EP1918121B1 (en) 2011-05-18
ATE509775T1 (en) 2011-06-15
DE102006049149A1 (en) 2008-04-24
US20080098919A1 (en) 2008-05-01
JP2008100516A (en) 2008-05-01
EP1918121A3 (en) 2009-04-15
CN101164779A (en) 2008-04-23

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