EP1179425A2 - Procédé et appareil pour le traitement d'une plaque ou cylindre d'impression réutilisable, dans une machine d'impression - Google Patents

Procédé et appareil pour le traitement d'une plaque ou cylindre d'impression réutilisable, dans une machine d'impression Download PDF

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Publication number
EP1179425A2
EP1179425A2 EP01115575A EP01115575A EP1179425A2 EP 1179425 A2 EP1179425 A2 EP 1179425A2 EP 01115575 A EP01115575 A EP 01115575A EP 01115575 A EP01115575 A EP 01115575A EP 1179425 A2 EP1179425 A2 EP 1179425A2
Authority
EP
European Patent Office
Prior art keywords
printing
laser
cylinders
assigned
treating
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
EP01115575A
Other languages
German (de)
English (en)
Other versions
EP1179425B1 (fr
EP1179425A3 (fr
Inventor
Arndt Jentzsch
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
Original Assignee
Koenig and Bauer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1179425A2 publication Critical patent/EP1179425A2/fr
Publication of EP1179425A3 publication Critical patent/EP1179425A3/fr
Application granted granted Critical
Publication of EP1179425B1 publication Critical patent/EP1179425B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 coating is applied.
  • the invention further relates to a device for performing the method from an imaging device with a laser which is assigned to a laser head,
  • DE 41 23 959 C1 describes a method for regenerating one for offset printing suitable printing form known.
  • the regeneration of the printing plate includes the Removal of the images on the printing form and hydrophilization of the surface of the Printing form.
  • the regeneration is carried out in that on the Printing form an ionized process gas applied by means of an application device is, a reactive deletion of the imaging and the simultaneous hydrophilization in a process step is carried out.
  • the resulting volatile reaction products are discharged through 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.
  • a printing method is known from US Pat. No. 4,718,340, in which on a printing plate or on a water-friendly layer is applied to the surface of a printing form cylinder. This in turn is covered with a color-friendly layer. To create the print image, the color-friendly layer is partially detached by an ablation laser, so that printing and non-printing areas arise.
  • the color-friendly image information is carried Layer, or both layers removed. This happens in one of the variants shown the same ablation laser that is used to generate the image information on the printing form was used.
  • the invention has the advantage that now the process of removing the image information can be accomplished in a much shorter time.
  • FIG. 1 shows a printing unit 1 of a multi-color sheet-fed offset printing machine.
  • the printing unit 1 contains a printing cylinder 2 and a transfer cylinder as the sheet-guiding cylinder 3 and a printing form cylinder 4 and a printing cylinder 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 an imaging device mounted in the frame (not shown) 8 assigned. This consists of a laser head 12 in which a laser 9 is integrated is. The power of the laser 9 is controllable. It can use solid-state lasers as well Gas discharge lasers can be applied.
  • the printing form cylinder 4 prepared after the application of the medium can now be imaged by the imaging device 8.
  • data for the printing process are generally processed in a known manner and fed to the imaging device 8.
  • the speed of rotation the printing form cylinder 4 is with the movement of the imaging device 8 synchronized.
  • the surface of the Coating 11 is loaded with image information and that at the printing points Polymer hardened by the laser beam, so that printing and non-printing areas are created.
  • the non - printing offices must be approved by the appropriate facilities unpolymerized material.
  • the printing process is then carried out. After the printing process, the imaging of the printing form cylinder 4 deleted. This is also done by the imaging device 8, which then works as an ablation device and the coating 11 detaches from the surface of the printing form cylinder or from the printing plate.
  • the intensity of the laser beam from the imaging device 8 increased and thus increased the effect on the surface to be treated.
  • An advantageous embodiment of the invention is the diameter of the laser beam by changing the focus. So that the reliability of the Image separation can be enlarged.
  • the imaging of the applied coating 11 and the image detachment take place with the rotating Printing forme cylinder 4. It is advantageous for this, the printing form cylinder 4 when imaging and uncoupling extinguishing from the drive.
  • the printing form cylinder has in this case for Illustration and image detachment have their own drive.
  • FIG. 1 Another embodiment of the invention is shown in FIG.
  • the structure of the Printing unit 1 is analogous to the embodiment shown above.
  • the imaging facility also consists of a laser head 12, to which a laser 9 is assigned.
  • the laser 9 is connected to a second laser 10 via an optical fiber cable.
  • several lasers are assigned via light guide cables 14.
  • the coating and the imaging take place analogously to the exemplary embodiment mentioned above.
  • the light guide cable 14 is inserted into the laser head 12 the light of the second laser 10 or other laser supplied and thus the intensity of the Effect on the surface to be treated increased.
  • FIG. 1 Another embodiment of the invention is shown in FIG.
  • the structure of the Printing unit 1 is analogous to the embodiment shown above.
  • the imaging facility also consists of a laser head 12, to which a laser 9 is assigned.
  • the coating and the imaging take place analogously to the exemplary embodiment mentioned above.
  • the light beam from the second laser 10 'is over the mirror system 13 is supplied to the laser head 12, so that the intensity of the effect is increased and the coating can be removed within a very short time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Processing (AREA)
EP01115575A 2000-08-09 2001-06-28 Procédé pour le traitement d'une plaque ou cylindre d'impression réutilisable, dans une machine d'impression Expired - Lifetime EP1179425B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10039822A DE10039822A1 (de) 2000-08-09 2000-08-09 Verfahren und Einrichtung zum Behandeln von erneut bebilderbaren Druckformen oder Druckformzylindern in Druckmaschinen
DE10039822 2000-08-09

Publications (3)

Publication Number Publication Date
EP1179425A2 true EP1179425A2 (fr) 2002-02-13
EP1179425A3 EP1179425A3 (fr) 2003-09-03
EP1179425B1 EP1179425B1 (fr) 2005-08-24

Family

ID=7652481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01115575A Expired - Lifetime EP1179425B1 (fr) 2000-08-09 2001-06-28 Procédé pour le traitement d'une plaque ou cylindre d'impression réutilisable, dans une machine d'impression

Country Status (4)

Country Link
US (1) US20020066383A1 (fr)
EP (1) EP1179425B1 (fr)
AT (1) ATE302695T1 (fr)
DE (2) DE10039822A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6820552B2 (en) * 2001-02-14 2004-11-23 Agfa-Gevaert Cleaning method for recycling a printing substrate by laser ablation
DE10217172A1 (de) 2002-04-18 2003-10-30 Koenig & Bauer Ag Verfahren zum Behandeln von erneut bebilderbaren Druckformen oder Druckformzylindern in Druckmaschinen
DE102007005815A1 (de) * 2007-02-06 2008-08-07 Maschinenfabrik Wifag Bebilderung einer Offset-Druckform

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654864A (en) * 1970-01-16 1972-04-11 Energy Conversion Devices Inc Printing employing materials with variable volume
GB2284788A (en) * 1993-12-16 1995-06-21 Roland Man Druckmasch Improvements in or relating to relief printing
WO1997027065A1 (fr) * 1996-01-24 1997-07-31 Scitex Corporation Ltd. Appareil d'imagerie destine a exposer un element d'impression et elements d'impression afferents
EP0911154A1 (fr) * 1997-10-24 1999-04-28 Fuji Photo Film Co., Ltd. Appareil pour la fabrication d'une plaque d'impression et imprimante et système d'impression utilisant cet appareil
EP0922573A2 (fr) * 1997-12-12 1999-06-16 Presstek, Inc. Méthode et appareil d'exposition par diode laser avec compensation de variations de la puissance émise
EP0958941A1 (fr) * 1998-05-18 1999-11-24 Fuji Photo Film Co., Ltd. Précurseur pour plaque d'impression lithographique, plaque l'utilisant, et méthodes de fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654864A (en) * 1970-01-16 1972-04-11 Energy Conversion Devices Inc Printing employing materials with variable volume
GB2284788A (en) * 1993-12-16 1995-06-21 Roland Man Druckmasch Improvements in or relating to relief printing
WO1997027065A1 (fr) * 1996-01-24 1997-07-31 Scitex Corporation Ltd. Appareil d'imagerie destine a exposer un element d'impression et elements d'impression afferents
EP0911154A1 (fr) * 1997-10-24 1999-04-28 Fuji Photo Film Co., Ltd. Appareil pour la fabrication d'une plaque d'impression et imprimante et système d'impression utilisant cet appareil
EP0922573A2 (fr) * 1997-12-12 1999-06-16 Presstek, Inc. Méthode et appareil d'exposition par diode laser avec compensation de variations de la puissance émise
EP0958941A1 (fr) * 1998-05-18 1999-11-24 Fuji Photo Film Co., Ltd. Précurseur pour plaque d'impression lithographique, plaque l'utilisant, et méthodes de fabrication

Also Published As

Publication number Publication date
EP1179425B1 (fr) 2005-08-24
ATE302695T1 (de) 2005-09-15
DE50107181D1 (de) 2005-09-29
US20020066383A1 (en) 2002-06-06
EP1179425A3 (fr) 2003-09-03
DE10039822A1 (de) 2002-02-21

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