EP0368180A2 - Process for the production of images in a printing cylinder - Google Patents

Process for the production of images in a printing cylinder Download PDF

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Publication number
EP0368180A2
EP0368180A2 EP89120430A EP89120430A EP0368180A2 EP 0368180 A2 EP0368180 A2 EP 0368180A2 EP 89120430 A EP89120430 A EP 89120430A EP 89120430 A EP89120430 A EP 89120430A EP 0368180 A2 EP0368180 A2 EP 0368180A2
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EP
European Patent Office
Prior art keywords
transfer
cylinder
printing form
form cylinder
substance
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
EP89120430A
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German (de)
French (fr)
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EP0368180B1 (en
EP0368180A3 (en
Inventor
Ingo Köbler
Hartmut Fuhrmann
Josef Schneider
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication of EP0368180A2 publication Critical patent/EP0368180A2/en
Publication of EP0368180A3 publication Critical patent/EP0368180A3/en
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Publication of EP0368180B1 publication Critical patent/EP0368180B1/en
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Classifications

    • 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
    • B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor
    • 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
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to a method for imaging a printing form cylinder in a printing press according to the preamble of claim 1.
  • An offset printing machine on which such a method is practiced is known from DE-PS 32 48 178.
  • substance parts are released from an continuously coated thermal transfer film by an electronically controlled pixel transfer unit, for example in the form of a thermal print head, and are placed directly on the printing form cylinder.
  • the invention has for its object to provide a method in which the above disadvantages are avoided and even with relatively large manufacturing tolerances of the parts involved in the substance transfer, a uniform transfer is guaranteed.
  • This object is achieved in that the substance is applied, at least in the alternative, to a soft surface.
  • This feature comprises variants on the one hand the direct interaction of the pixel transfer unit with a printing form cylinder, which has a soft surface, and on the other others the interposition of another cylinder with a soft surface - for example the blanket cylinder of an offset printing press - from where the transfer to the printing form cylinder takes place in a second transfer step.
  • a three-cylinder printing unit of a web-fed offset printing press is shown schematically.
  • a printing material web 3 is passed between a printing cylinder 1 and a blanket cylinder 2 during the printing process.
  • the blanket cylinder 2 serves as a transfer cylinder for a print image generated by the surface of a printing form cylinder 4.
  • the printing form cylinder 4 has an elastomeric surface with a preferably hydrophilic property.
  • Acrylic ester rubber, nitrile rubber or modified polyvinyl chloride (PVC), for example, are suitable as materials for such a surface.
  • a pixel transfer unit 5 which consists of a thermal print head 7 equipped with a plurality of heatable heating elements 6 or pen electrodes, one of which parallel to a surface line of the printing form cylinder 4 leading guide bar 8 and a control unit 9.
  • the control unit 9 is connected via a signal line 10 to the thermal print head 7 which can be moved along the guide bar 8 and via a further signal line 11 to a preferably electronic image memory 12.
  • a thermal transfer film 13 is arranged between the printing form cylinder 4 and the heating elements 6 of the thermal print head.
  • the thermal transfer film 13 is continuously coated on its side facing the printing form cylinder 4 with a substance 14 which is fusible when supplied with energy and which is solid at room temperature and preferably has oleophilic properties.
  • a substance 14 which is fusible when supplied with energy and which is solid at room temperature and preferably has oleophilic properties.
  • wax or a thermoplastic material are suitable as substance 14.
  • the thermal transfer film 13 is wound up on a drum 17 and is used for imaging the printing form cylinder 4 together with the pixel transfer unit to such an extent that it touches the surface of the same in one part.
  • a further drum 18 is provided for winding up the part of the thermal transfer film 13 used in the imaging.
  • the control unit 9 To transfer parts 14 a of the substance 14 to the printing form cylinder 4, the control unit 9 first reads image information digitally stored there for each pixel from the image memory 12 and activates one of the heating elements 6 of the thermal printhead depending on whether an image point is to transfer color or not 7.
  • the heating elements 6 placed on the thermal transfer film 13 are acted upon with energy if a pixel is to be color-guiding.
  • the energy can be generated directly as thermal energy in the heating elements or can be released in the case of training as pin electrodes by their interaction with a thermal transfer film formed from several layers of different electrical resistance according to the "resistive ribbon method".
  • the substance parts 14 a melted by the action of energy are deposited on the surface of the printing form cylinder 4 and solidify there very quickly.
  • the fact that the surface of the printing form cylinder 4 is provided with a soft layer means that the manufacturing accuracy of the print head and the guide bar, as well as the printing form cylinder, are not overly high.
  • the substance parts are transferred pixel by pixel line by line, when using several heating elements 6 (or pin electrodes) in several lines in parallel.
  • the feed of the print head 7 and the further rotation of the printing form cylinder 4 after transmission of one (or more image line (s) generated in parallel) are also controlled by the control unit 9.
  • both the printing plate cylinder 4 or 15 and the blanket cylinder 2 or 2 'can advantageously be provided with a seamless surface.
  • a print head that extends over the entire width of the printing form cylinder can also be used, which is either formed in one piece or is composed of several parts that are offset with respect to one another as seen in the running direction of the transfer film.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Electronic Switches (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

A process for the production of images in a printing cylinder in a rotary offset machine is specified, in which parts of the surface of the printing cylinder are changed in respect of their ink/water affinity by means of a substance coating which is adequate for the image and influences the ink guiding. In contrast to a known process, in which the substance transfer likewise takes place by means of the thermotransfer process but directly onto the printing cylinder provided with a hard surface, the process according to the invention is characterised in that the substance coating takes place at least as an alternative on a soft surface. For this purpose, either the surface of the printing cylinder is soft or the transfer takes place in two transfer steps with interposition of a transfer cylinder with a soft surface - preferably of the blanket cylinder. The process guarantees an even transfer of the substance even in the case of relatively wide production tolerances since deviations in the transfer line relating to distance and pressing force are compensated. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Bebilderung eines Druckformzylinders in einer Druckmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for imaging a printing form cylinder in a printing press according to the preamble of claim 1.

Eine Offset- Druckmaschine, an der ein solches Verfahren praktiziert wird, ist aus der DE-PS 32 48 178 bekannt. Bei dieser werden Substanzteile von einer elektronisch gesteuerten, beispielsweise als Wärmedruckkopf ausgebildeten Bildpunkt- Übertragungseinheit entsprechend einer digitalen Bildinformation aus einer durchgehend beschichteten Thermotransferfolie herausgelöst und unmittelbar auf dem Druckformzylinder abgelegt.An offset printing machine on which such a method is practiced is known from DE-PS 32 48 178. In this case, substance parts are released from an continuously coated thermal transfer film by an electronically controlled pixel transfer unit, for example in the form of a thermal print head, and are placed directly on the printing form cylinder.

In der Anordnung Wärmedruckkopf - Thermotransferfolie - Druckformzylinder können Abstands- und Kontaktschwankungen auftreten, wenn sowohl die Stiftelektroden oder Heizelemente des Wärmedruckkopfes als auch die Oberfläche des Druckformzylinders starr und unelastisch ausgeführt sind. Bereits kleinste Formabweichungen an einem der beteiligten Teile beeinträchtigen den wirksamen Anpreßdruck und somit die Wärmeübertragung, was sich in einem ungleichmäßig übertragenen Druckbild oder schlecht verankerten Druckbildelementen niederschlägt.In the arrangement of the thermal print head - thermal transfer film - printing form cylinder, spacing and contact fluctuations can occur if both the pin electrodes or heating elements of the thermal printing head and the surface of the printing form cylinder are rigid and inelastic. Even the smallest deviations in shape of one of the parts involved impair the effective contact pressure and thus the heat transfer, which is reflected in an unevenly transmitted print image or poorly anchored print image elements.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, bei dem die vorstehenden Nachteile vermieden werden und auch bei relativ großen Fertigungstoleranzen der an der Substanzübertragung beteiligten Teile eine gleichmäßige Übertragung gewährleistet ist.The invention has for its object to provide a method in which the above disadvantages are avoided and even with relatively large manufacturing tolerances of the parts involved in the substance transfer, a uniform transfer is guaranteed.

Diese Aufgabe wird dadurch gelöst, daß der Substanzauftrag zumindestens hilfsweise auf eine weiche Oberfläche erfolgt. Dieses Merkmal umfaßt als Varianten zum einen das unmittelbare Zusammenwirken der Bildpunkt- Übertragungseinheit mit einem Druckformzylinder, der eine weiche Oberfläche aufweist und zum anderen die Zwischenschaltung eines anderen Zylinders mit weicher Oberfläche - beispielsweise des Gummituchzylinders einer Offset- Druckmaschine -, von wo aus in einem zweiten Transferschritt die Übertragung an den Druckformzylinder erfolgt.This object is achieved in that the substance is applied, at least in the alternative, to a soft surface. This feature comprises variants on the one hand the direct interaction of the pixel transfer unit with a printing form cylinder, which has a soft surface, and on the other others the interposition of another cylinder with a soft surface - for example the blanket cylinder of an offset printing press - from where the transfer to the printing form cylinder takes place in a second transfer step.

Durch die Kompressibilität einer weichen Oberfläche können Linearitätsschwankungen längs der Aufzeichnungslinie wirksam kompensiert werden. Durch die damit mögliche großzügigere Tolerierung der beteiligten Komponenten werden die Fertigungskosten erheblich reduziert.Due to the compressibility of a soft surface, linearity fluctuations along the recording line can be effectively compensated for. Due to the more generous tolerance of the components involved, the manufacturing costs are considerably reduced.

Nachfolgend ist je ein Ausführungsbeispiel für die Erfindung anhand zweier Figuren erklärt.

  • Fig. 1 zeigt die Direktbebilderung eines Druckformzylinders in einem Transferschritt;
  • Fig. 2 zeigt die Bebilderung eines Druckformzylinders unter Zwischenschaltung eines Übertragungszylinders in zwei Transferschritten.
An exemplary embodiment of the invention is explained below using two figures.
  • 1 shows the direct imaging of a printing form cylinder in a transfer step;
  • 2 shows the illustration of a printing form cylinder with the interposition of a transfer cylinder in two transfer steps.

In Fig. 1 ist schematisch ein Dreizylinderdruckwerk einer Rollenrotations- Offsetdruckmaschine dargestellt. Zwischen einem Druckzylinder 1 und einem Gummituchzylinder 2 wird beim Druckvorgang eine Bedruckstoffbahn 3 hindurchgeführt. Der Gummituchzylinder 2 dient als Ubertragungszylinder für ein durch die Oberfläche eines Druckformzylinders 4 erzeugtes Druckbild. Der Druckformzylinder 4 weist eine elastomere Oberfläche mit vorzugsweise hydrophiler Eigenschaft auf. Als Materialien für eine solche Oberfläche sind beispielsweise Acrylester- Kautschuk, Nitrilkautschuk oder modifiziertes Polyvenylchlorid (PVC) geeignet.In Fig. 1, a three-cylinder printing unit of a web-fed offset printing press is shown schematically. A printing material web 3 is passed between a printing cylinder 1 and a blanket cylinder 2 during the printing process. The blanket cylinder 2 serves as a transfer cylinder for a print image generated by the surface of a printing form cylinder 4. The printing form cylinder 4 has an elastomeric surface with a preferably hydrophilic property. Acrylic ester rubber, nitrile rubber or modified polyvinyl chloride (PVC), for example, are suitable as materials for such a surface.

Zur Erzeugung des Druckbildes auf der Oberfläche des Druckformzylinders ist eine Bildpunkt- Übertragungseinheit 5 vorgesehen, die sich aus einem mit mehreren beheizbaren Heizelementen 6 oder Stiftelektroden bestückten Thermodruckkopf 7, einer diesen parallel zu einer Mantellinie des Druckformzylinders 4 führenden Führungsleiste 8 und einer Steuereinheit 9 zusammensetzt. Die Steuereinheit 9 ist über eine Signalleitung 10 mit dem längs der Führungsleiste 8 verfahrbaren Thermodruckkopf 7 und über eine weitere Signalleitung 11 mit einem vorzugsweise elektronischen Bildspeicher 12 verbunden.To generate the print image on the surface of the printing form cylinder, a pixel transfer unit 5 is provided, which consists of a thermal print head 7 equipped with a plurality of heatable heating elements 6 or pen electrodes, one of which parallel to a surface line of the printing form cylinder 4 leading guide bar 8 and a control unit 9. The control unit 9 is connected via a signal line 10 to the thermal print head 7 which can be moved along the guide bar 8 and via a further signal line 11 to a preferably electronic image memory 12.

Zwischen Druckformzylinder 4 und den Heizelementen 6 des Thermodruckkopfes ist eine Thermotransferfolie 13 angeordnet. Die Thermotransferfolie 13 ist auf ihrer dem Druckformzylinder 4 zugewandten Seite durchgehend mit einer bei Energiezufuhr schmelzbaren, bei Raumtemperatur festen Substanz 14 beschichtet, die vorzugsweise oleophile Eigenschaften aufweist. Als Substanz 14 eignen sich beispielsweise Wachs oder ein thermoplastischer Kunststoff. Die Thermotransferfolie 13 ist auf einer Trommel 17 aufgespult und wird zur Bebilderung des Druckformzylinders 4 mitsamt der Bildpunkt- Übertragungseinheit soweit an diesen angestellt, daß sie die Oberfläche desselben in einem Teil berührt. Zum Aufspulen des beim Bebildern benutzten Teils der Thermotransferfolie 13 ist eine weitere Trommel 18 vorgesehen.A thermal transfer film 13 is arranged between the printing form cylinder 4 and the heating elements 6 of the thermal print head. The thermal transfer film 13 is continuously coated on its side facing the printing form cylinder 4 with a substance 14 which is fusible when supplied with energy and which is solid at room temperature and preferably has oleophilic properties. For example, wax or a thermoplastic material are suitable as substance 14. The thermal transfer film 13 is wound up on a drum 17 and is used for imaging the printing form cylinder 4 together with the pixel transfer unit to such an extent that it touches the surface of the same in one part. A further drum 18 is provided for winding up the part of the thermal transfer film 13 used in the imaging.

Zum Übertragen von Teilen 14 a der Substanz 14 auf den Druckformzylinder 4 liest die Steuereinheit 9 zunächst aus dem Bildspeicher 12 dort für jeden Bildpunkt digital gespeicherte Bildinformationen aus und aktiviert je nachdem, ob ein Bildpunkt Farbe übertragen soll oder nicht, eines der Heizelemente 6 des Thermodruckkopfes 7. Die an die Thermotransferfolie 13 angestellten Heizelemente 6 werden, wenn ein Bildpunkt farbführend sein soll, mit Energie beaufschlagt. Die Energie kann direkt als Wärmeenergie in den Heizelementen erzeugt werden oder bei einer Ausbildung als Stiftelektroden durch deren Zusammenwirken mit einer aus mehreren Schichten verschiedenen elektrischen Widerstandes gebildeten Thermotransferfolie nach der "resistive- ribbon-Methode" freigesetzt werden. Die durch die Energieeinwirkung erschmolzenen Substanzteile 14 a lagern sich auf der Oberfläche des Druckformzylinders 4 ab und erstarren dort sehr schnell.To transfer parts 14 a of the substance 14 to the printing form cylinder 4, the control unit 9 first reads image information digitally stored there for each pixel from the image memory 12 and activates one of the heating elements 6 of the thermal printhead depending on whether an image point is to transfer color or not 7. The heating elements 6 placed on the thermal transfer film 13 are acted upon with energy if a pixel is to be color-guiding. The energy can be generated directly as thermal energy in the heating elements or can be released in the case of training as pin electrodes by their interaction with a thermal transfer film formed from several layers of different electrical resistance according to the "resistive ribbon method". The substance parts 14 a melted by the action of energy are deposited on the surface of the printing form cylinder 4 and solidify there very quickly.

Dadurch, daß die Oberfläche des Druckformzylinders 4 mit einer weichen Schicht versehen ist, werden an die Fertigungsgenauigkeit des Druckkopfes und der Führungsleiste sowie des Druckformzylinders keine übertrieben hohen Anforderungen gestellt.The fact that the surface of the printing form cylinder 4 is provided with a soft layer means that the manufacturing accuracy of the print head and the guide bar, as well as the printing form cylinder, are not overly high.

Die Übertragung der Substanzteile erfolgt bildpunktweise Zeile für Zeile, bei Verwendung mehrerer Heizelemente 6 (oder Stiftelektroden) in mehreren Zeilen parallel. Der Vorschub des Druckkopfes 7 sowie die Weiterdrehung des Druckformzylinders 4 nach Übertragung einer (oder mehrerer parallel erzeugter) Bildpunktzeile(n) werden ebenfalls durch die Steuereinheit 9 kontrolliert.The substance parts are transferred pixel by pixel line by line, when using several heating elements 6 (or pin electrodes) in several lines in parallel. The feed of the print head 7 and the further rotation of the printing form cylinder 4 after transmission of one (or more image line (s) generated in parallel) are also controlled by the control unit 9.

Bei der in Fig. 2 gezeigten Variante sind alle zur Fig. 1 gleichen Teile mit gleicher Bezugszahl, ergänzt durch "'" bezeichnet. Eine zur Bildpunkt- Übertragungseinheit 5 des ersten Ausführungsbeispiels analoge Einrichtung 5′ ist an einen Gummituchzylinder 2′ einer Rollenrotations- Offsetdruckmaschine angestellt. Die Substanzteile 14 a′ werden mittels der Bildpunkt- Übertragungseinheit 5′ in einem ersten Transferschritt aus einer Thermotransferfolie 13′ herausgelöst und an die weiche Oberfläche des Gummituchzylinders 2′ übertragen. Auf den Gummituchzylinder 2′ ist kurz vor dessen Berührungslinie mit einem Druckformzylinder 15 eine Heizeinrichtung 16 gerichtet, mittels der die auf dem Gummituchzylinder 2′ nach dem ersten Transferschritt erstarrten und somit zwischengelagerten Substanzteile 14 a′ erneut geschmolzen und nunmehr zeilenweise in einem zweiten Transferschritt an den Druckformzylinder 15 übertragen werden. Dadurch, daß hierbei die weiche Oberfläche des Gummituchzylinders 2′ an die harte Oberfläche des Druckformzylinders 15 angedrückt wird, können auch bei diesem zweiten Transferschritt Formabweichungen der beteiligten Zylinder gut ausgeglichen werden.In the variant shown in FIG. 2, all the parts that are the same as in FIG. 1 are identified by the same reference number, supplemented by "" ". An analogous to the pixel transmission unit 5 of the first embodiment 5 'is employed on a blanket cylinder 2' of a web-fed offset printing machine. The substance parts 14 a 'are separated by means of the pixel transfer unit 5' in a first transfer step from a thermal transfer film 13 'and transferred to the soft surface of the blanket cylinder 2'. On the blanket cylinder 2 'is directed shortly before its line of contact with a printing form cylinder 15, a heater 16, by means of which solidified on the blanket cylinder 2' after the first transfer step and thus temporarily stored substance parts 14 a 'melted again and now line by line in a second transfer step to the Printing form cylinder 15 are transmitted. Characterized in that the soft surface of the blanket cylinder 2 'is pressed onto the hard surface of the printing form cylinder 15, shape deviations of the cylinders involved can also be compensated well in this second transfer step.

Bei beiden Varianten können sowohl der Druckformzylinder 4 bzw. 15 als auch der Gummituchzylinder 2 bzw. 2′ vorteilhaft mit einer nahtlosen Oberfläche versehen sein.In both variants, both the printing plate cylinder 4 or 15 and the blanket cylinder 2 or 2 'can advantageously be provided with a seamless surface.

Als Variante zu einem längs einer Führung verfahrbaren Druckkopf kann auch ein über die gesamte Breite des Druckformzylinders reichender Druckkopf eingesetzt werden, der entweder einstückig ausgebildet ist oder sich aus mehreren, in Laufrichtung der Transferfolie gesehen gegeneinander versetzten Teilen zusammensetzt.As a variant of a print head that can be moved along a guide, a print head that extends over the entire width of the printing form cylinder can also be used, which is either formed in one piece or is composed of several parts that are offset with respect to one another as seen in the running direction of the transfer film.

Claims (9)

1. Verfahren zur Bebilderung eines Druckformzylinders in einer Rotations- Offsetdruckmaschine mittels eines bildadäquaten, die Farbführung beeinflussenden Substanzauftrages auf Teile der Druckformzylinder- Oberfläche durch eine nach dem Thermotransfer- Verfahren arbeitende Bildpunkt-­Übertragungseinheit, dadurch gekennzeichnet, daß der Substanzauftrag zumindestens hilfsweise auf eine weiche Oberfläche erfolgt.1. A method for imaging a printing forme cylinder in a rotary offset printing machine by means of an image-appropriate substance application influencing the color guidance on parts of the printing form cylinder surface by a pixel transfer unit working according to the thermal transfer method, characterized in that the substance application at least in the alternative on a soft surface he follows. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bildpunkt- Übertragungseinheit (5) die die Farbführung beeinflussende Substanz (14) direkt an den Druckformzylinder (4) überträgt.2. The method according to claim 1, characterized in that the pixel transmission unit (5) transmits the substance influencing the ink guide (14) directly to the printing form cylinder (4). 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Oberfläche des Druckformzylinders (4) aus Acrylester- Kautschuk besteht.3. The method according to claim 2, characterized in that the surface of the printing form cylinder (4) consists of acrylic ester rubber. 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Oberfläche des Druckformzylinders (4) aus Nitrilkautschuk besteht.4. The method according to claim 2, characterized in that the surface of the printing form cylinder (4) consists of nitrile rubber. 5. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Oberfläche des Druckformzylinders (4) aus modifiziertem Polyvenylchlorid (PVC) besteht.5. The method according to claim 2, characterized in that the surface of the printing form cylinder (4) consists of modified polyvinyl chloride (PVC). 6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Druckformzylinder(4, 15) mit einer nahtlosen Oberfläche versehen ist.6. The method according to any one of the preceding claims, characterized in that the printing form cylinder (4, 15) is provided with a seamless surface. 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bildpunkt- Übertragungseinheit die (5′) die Farbführung beeinflussende Substanz (14′) zunächst in einem ersten Transferschritt an einen Übertragungszylinder (2′) mit weicher Oberfläche abgibt, von dem aus in einem zweiten Transferschritt die Übertragung an den Druckformzylinder (15) erfolgt.7. The method according to claim 1, characterized in that the pixel transmission unit (5 ') influencing the color guide substance (14') first in a first transfer step to a transfer cylinder (2 ') with softer Releases surface from which the transfer to the printing form cylinder (15) takes place in a second transfer step. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß als Übertragungszylinder ein Gummtiuchzylinder (2′) verwendet wird.8. The method according to claim 7, characterized in that a rubber cylinder (2 ') is used as the transfer cylinder. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß der Gummituchzylinder (2, 2′) eine nahtlose Oberfläche aufweist.9. The method according to claim 8, characterized in that the blanket cylinder (2, 2 ') has a seamless surface.
EP89120430A 1988-11-09 1989-11-04 Process for the production of images in a printing cylinder Expired - Lifetime EP0368180B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3837978A DE3837978A1 (en) 1988-11-09 1988-11-09 METHOD FOR IMAGING A PRINT FORM CYLINDER
DE3837978 1988-11-09

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EP0368180A2 true EP0368180A2 (en) 1990-05-16
EP0368180A3 EP0368180A3 (en) 1990-11-22
EP0368180B1 EP0368180B1 (en) 1993-10-20

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JP (1) JP2974699B2 (en)
DE (2) DE3837978A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1048458A1 (en) * 1999-04-27 2000-11-02 Agfa-Gevaert N.V. Method for making a lithographic printing master
EP1090750A2 (en) * 1999-10-01 2001-04-11 Koenig & Bauer Aktiengesellschaft Processing of printing plates within printing machines
EP1167024A1 (en) * 2000-06-21 2002-01-02 Koenig & Bauer Aktiengesellschaft Method and means for applying imageable layers in printing machines
EP1167023A1 (en) * 2000-06-21 2002-01-02 Koenig & Bauer Aktiengesellschaft Method and means for applying imageable layers in printing machines
EP1308307A3 (en) * 2001-10-31 2004-04-28 MAN Roland Druckmaschinen AG Method and device for integrated printing plate production in a processing machine
US6782824B2 (en) 2001-05-04 2004-08-31 Man Roland Druckmaschinen Ag Printing unit with reversible image setting and digital changeover

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811029C2 (en) 1998-03-13 2000-02-24 Roland Man Druckmasch Regulation of the speeds in a method and device for producing a thermal transfer print using ribbon-shaped transfer films

Citations (5)

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FR457270A (en) * 1913-04-30 1913-09-15 J Voirin Des Ets Method and device for the direct production of printing plates used in transfer machines on rubber or other plastics
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FR457270A (en) * 1913-04-30 1913-09-15 J Voirin Des Ets Method and device for the direct production of printing plates used in transfer machines on rubber or other plastics
DE3248178C2 (en) * 1982-12-27 1987-02-19 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt, De
EP0264604A2 (en) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Lithographic-printing plate
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EP0363842A2 (en) * 1988-10-08 1990-04-18 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Process for the production of printing plates

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EP1048458A1 (en) * 1999-04-27 2000-11-02 Agfa-Gevaert N.V. Method for making a lithographic printing master
EP1090750A2 (en) * 1999-10-01 2001-04-11 Koenig & Bauer Aktiengesellschaft Processing of printing plates within printing machines
EP1090750A3 (en) * 1999-10-01 2001-08-22 Koenig & Bauer Aktiengesellschaft Processing of printing plates within printing machines
EP1167024A1 (en) * 2000-06-21 2002-01-02 Koenig & Bauer Aktiengesellschaft Method and means for applying imageable layers in printing machines
EP1167023A1 (en) * 2000-06-21 2002-01-02 Koenig & Bauer Aktiengesellschaft Method and means for applying imageable layers in printing machines
US6782824B2 (en) 2001-05-04 2004-08-31 Man Roland Druckmaschinen Ag Printing unit with reversible image setting and digital changeover
EP1308307A3 (en) * 2001-10-31 2004-04-28 MAN Roland Druckmaschinen AG Method and device for integrated printing plate production in a processing machine

Also Published As

Publication number Publication date
JP2974699B2 (en) 1999-11-10
DE3837978C2 (en) 1990-08-16
JPH02172740A (en) 1990-07-04
EP0368180B1 (en) 1993-10-20
DE58905972D1 (en) 1993-11-25
EP0368180A3 (en) 1990-11-22
DE3837978A1 (en) 1990-05-10

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