EP1155871A2 - 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 PDFInfo
- Publication number
- EP1155871A2 EP1155871A2 EP01111023A EP01111023A EP1155871A2 EP 1155871 A2 EP1155871 A2 EP 1155871A2 EP 01111023 A EP01111023 A EP 01111023A EP 01111023 A EP01111023 A EP 01111023A EP 1155871 A2 EP1155871 A2 EP 1155871A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- layer
- image information
- treating
- imaging device
- 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
Links
- 238000007639 printing Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims description 27
- 238000002679 ablation Methods 0.000 claims abstract description 5
- 238000003384 imaging method Methods 0.000 claims description 25
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 238000007774 anilox coating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003847 radiation curing Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 generate 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 The detachment device is not described in more detail.
- a method for the regeneration of 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 means of a suction device.
- a disadvantage of this regeneration device is the high level of technical effort required for the Regeneration of the printing plates must be operated.
- the invention has the advantage that the method according to the invention provides additional 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 press.
- 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.
- 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 possible automatically, 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 stored in a computer (not shown) known manner processed and the device for printing form cylinder imaging forwarded.
- 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 printing and non-printing areas arise.
- 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 printing are carried out 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.
- 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 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.
Landscapes
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Printing Methods (AREA)
- Paper (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
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 generate 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 The detachment device is not described in more detail.
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 the document DE 41 23 959 C1, a method for the regeneration of 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 means of a suction device.
Nachteilig an dieser Regenerierungseinrichtung ist der hohe technische Aufwand, der für die Regenerierung der Druckplatten betrieben werden muss.A disadvantage of this regeneration device is the high level of technical effort 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.Starting from 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
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 provides additional 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
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
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
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
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
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
Der nach dem Aufbringen des Mediums präparierte Druckformzylinder 4 kann nunmehr
durch die Bebilderungseinrichtung 9 bebildert werden.The
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 this case, data for the printing process are generally stored in a computer (not shown)
known manner processed and the device for printing form cylinder imaging
forwarded. The speed of rotation of the
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
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 printing are carried out 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
Eine vorteilhafte Ausführung der Erfindung besteht darin, den Durchmesser des Laser-Strahls 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
Das oben beschriebene Verfahren beschränkt sich nicht auf den Offsetdruck. Beim Flexo-Druck
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 flexo printing
the
- 11
- DruckwerkPrinting unit
- 22nd
- DruckzylinderImpression cylinder
- 33rd
- ÜbergabezylinderTransfer cylinder
- 44th
- DruckformzylinderPrinting form cylinder
- 55
- GummizylinderRubber cylinder
- 66
- FarbwerkInking unit
- 77
- FeuchtwerkDampening system
- 88th
- BeschichtungseinrichtungCoating facility
- 99
- BebilderungseinrichtungImaging device
- 1010th
- Entwickler-EinheitDeveloper unit
- 1111
- Schichtlayer
Claims (7)
dadurch gekennzeichnet, dass
zum Ablösen der Schicht (11) oder zum Egalisieren der Oberfläche diese durch eine Bebilderungseinrichtung (9) mit der invertierten Bildinformation beaufschlagt wird.Method for treating reimageable printing forms or printing form cylinders in printing presses, wherein an imageable layer (11) is applied to the surface to be treated and this layer (11) is acted upon by an imaging device (9) with image information in order to print and non-printing areas produce,
characterized in that
in order to detach the layer (11) or to level the surface, the inverted image information is applied to it by an imaging device (9).
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 true EP1155871A2 (en) | 2001-11-21 |
| EP1155871A3 EP1155871A3 (en) | 2003-08-20 |
| EP1155871B1 EP1155871B1 (en) | 2004-08-11 |
Family
ID=7642402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01111023A Expired - Lifetime EP1155871B1 (en) | 2000-05-15 | 2001-05-08 | Method for treating re-usable printing plates or cylinders in printing machines |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1155871B1 (en) |
| AT (1) | ATE273141T1 (en) |
| DE (2) | DE10024184A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011097054A1 (en) * | 2010-02-03 | 2011-08-11 | Eastman Kodak Company | A method for fixing a flexographic plate |
Families Citing this family (2)
| 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 |
Citations (2)
| 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 |
-
2000
- 2000-05-15 DE DE10024184A patent/DE10024184A1/en not_active Withdrawn
-
2001
- 2001-05-08 AT AT01111023T patent/ATE273141T1/en not_active IP Right Cessation
- 2001-05-08 EP EP01111023A patent/EP1155871B1/en not_active Expired - Lifetime
- 2001-05-08 DE DE50103183T patent/DE50103183D1/en not_active Expired - Lifetime
Patent Citations (2)
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 2000, no. 04, 31. August 2000 (2000-08-31) & JP 2000 015770 A (THINK LABORATORY CO LTD), 18. Januar 2000 (2000-01-18) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011097054A1 (en) * | 2010-02-03 | 2011-08-11 | Eastman Kodak Company | A method for fixing a flexographic plate |
| US8318406B2 (en) | 2010-02-03 | 2012-11-27 | Eastman Kodak Company | Method for fixing a flexographic plate |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1155871A3 (en) | 2003-08-20 |
| ATE273141T1 (en) | 2004-08-15 |
| EP1155871B1 (en) | 2004-08-11 |
| DE10024184A1 (en) | 2001-11-22 |
| DE50103183D1 (en) | 2004-09-16 |
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