EP1179425B1 - Procédé pour le traitement d'une plaque ou cylindre d'impression réutilisable, dans une machine d'impression - Google Patents

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

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Publication number
EP1179425B1
EP1179425B1 EP01115575A EP01115575A EP1179425B1 EP 1179425 B1 EP1179425 B1 EP 1179425B1 EP 01115575 A EP01115575 A EP 01115575A EP 01115575 A EP01115575 A EP 01115575A EP 1179425 B1 EP1179425 B1 EP 1179425B1
Authority
EP
European Patent Office
Prior art keywords
printing
laser
coating
cylinder
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.)
Expired - Lifetime
Application number
EP01115575A
Other languages
German (de)
English (en)
Other versions
EP1179425A3 (fr
EP1179425A2 (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 plates or printing forme cylinders in printing machines, wherein on the surface to be treated a imageable coating is applied.
  • the invention further relates to a device for carrying out the method, consisting from an imaging device with a laser, which is assigned to a laser head,
  • the regeneration of the printing plate includes the Removal of the imaging on the printing form and hydrophilization of the surface of the Printing form. According to this document, the regeneration takes place in that on the Printing form applied an ionized process gas by means of a loading device with a reactive deletion of the imaging and the simultaneous hydrophilization in a process step is made. The resulting volatile reaction products are removed by a suction device.
  • a disadvantage of this regeneration device is the high technical complexity required for the Regeneration of the printing plates must be operated.
  • the invention has the advantage that now the process of removing the image information in a much shorter time.
  • FIG. 1 shows a printing unit 1 of a multicolour sheet-fed rotary printing press.
  • the printing unit 1 contains, as a sheet-guiding cylinder, a printing cylinder 2 and a transfer cylinder 3 and as a print image transferring cylinder a printing form cylinder 4 and a Rubber cylinder 5.
  • Each printing form cylinder 4 is assigned an inking unit 6 and a dampening unit 7. On the Printing form cylinder 4 can also be clamped (not shown here printing plate).
  • the printing form cylinder 4 is a (not shown) mounted in the frame imaging device 8 assigned.
  • This consists of a laser head 12, in which a laser 9 integrated is.
  • the power of the laser 9 is controllable. It can be both solid state lasers and Gas discharge laser can be applied.
  • the prepared after application of the medium printing form cylinder 4 can now be imaged by the imaging device 8.
  • the printing process is completed.
  • the artwork will be taken 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 plate cylinder or from the printing plate.
  • the intensity of the laser beam of the imaging device 8 increases and thus increased the effect on the surface to be treated.
  • the happens according to the invention by increasing the power of the laser 9 by the electrical operating parameters are changed.
  • An advantageous embodiment of the invention is the diameter of the laser beam to increase by changing the focus.
  • the reliability of the Image resolution can be increased.
  • the imaging of the applied coating 11 and the image removal take place with rotating It is advantageous to the printing form cylinder 4 when Imaging Disconnect from the drive and delete.
  • the printing forme cylinder has in this case for the Imaging and image removal a separate drive.
  • FIG. 2 shows a further exemplary embodiment of the invention.
  • the construction of the Printing unit 1 is analogous to the embodiment shown above.
  • the imaging device also consists of a laser head 12, which is associated with a laser 9.
  • the laser 9 is connected via a light guide cable with a second laser 10.
  • several lasers are assigned via fiber optic cable 14.
  • the coating and the imaging are carried out analogously to the above-mentioned embodiment.
  • To detach the coating is in the laser head 12 via the optical fiber 14th the light of the second laser 10 or further laser supplied and thus the intensity of the Increased effect on the surface to be treated.
  • FIG. 2 shows a further exemplary embodiment of the invention.
  • the construction of the Printing unit 1 is analogous to the embodiment shown above.
  • the imaging device also consists of a laser head 12, which is associated with a laser 9.
  • the coating and the imaging are carried out analogously to the above-mentioned embodiment.
  • the light beam of the second laser 10 'over the mirror system 13 is supplied to the laser head 12 so that the intensity of the effect is enhanced and the coating can be peeled off 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)

Claims (5)

  1. Procédé de traitement de clichés d'impression ou de cylindres porte-clichés, dans des machines d'imprimerie, pour effectuer de nouveau la formation d'un dessin, selon lequel
    sur la surface à traiter est déposé un revêtement (11) pouvant recevoir un dessin,
    ce revêtement (11), pour produire une information de dessin, reçoit de l'énergie fournie par un dispositif de formation de dessin (8) comportant un laser (9),
    l'opération d'impression est engagée avec le cliché sur lequel a été formé le dessin,
    une fois l'impression effectuée, le dessin est retiré du cylindre porte-clichés,
    le dispositif de formation de dessin (8) est utilisé également pour retirer le revêtement (11),
    lors de l'enlèvement du revêtement par le dispositif de formation de dessin (8), l'intensité du laser agissant sur la surface à traiter est augmentée.
  2. Procédé de traitement de clichés d'impression ou de cylindres porte-clichés, dans des machines d'imprimerie, selon la revendication 1,
    caractérisé en ce que
    lors de la formation du dessin, l'apport d'énergie dans le revêtement (11) polymérise les éléments portant le dessin.
  3. Procédé de traitement, de clichés d'impression ou de cylindres porte-clichés, dans des machines d'imprimerie, selon la revendication 1,
    caractérisé en ce que
    pour augmenter la puissance du dispositif de formation de dessin (8) lors de l'enlèvement du revêtement (11), la puissance du laser est élevée au niveau nécessaire.
  4. Procédé de traitement, de clichés d'impression ou de cylindres porte-clichés, dans des machines d'imprimerie, selon la revendication 1,
    caractérisé en ce que
    pour augmenter la puissance du dispositif de formation de dessin (8) lors de l'enlèvement du revêtement (11), un autre laser (10, 10') est mis en action.
  5. Procédé de traitement, de clichés d'impression ou de cylindres porte-clichés, dans des machines d'imprimerie, selon les revendications 1 à 4,
    caractérisé en ce que
    le diamètre du rayon laser est augmenté pendant l'opération d'effacement du dessin.
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 EP1179425A2 (fr) 2002-02-13
EP1179425A3 EP1179425A3 (fr) 2003-09-03
EP1179425B1 true 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

Family Cites Families (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
DE4342954C2 (de) * 1993-12-16 1998-01-22 Roland Man Druckmasch Verfahren zum Herstellen und Löschen einer löschbaren Hochdruckform, Vorrichtung zur Durchführung des Verfahrens und deren Verwendung
IL116885A0 (en) * 1996-01-24 1996-05-14 Scitex Corp Ltd An imaging apparatus for exposing a printing member
DE69805385T2 (de) * 1997-10-24 2002-09-12 Fuji Photo Film Co Ltd Vorrichtung zur Herstellung einer Druckplatte und Drucker und Drucksystem die diese Vorrichtung verwenden
US6072511A (en) * 1997-12-12 2000-06-06 Presstek, Inc. Method and apparatus for diode-laser imaging with compensation for output variations
JP3739962B2 (ja) * 1998-05-18 2006-01-25 富士写真フイルム株式会社 平版印刷版用原版、これを用いた平版印刷版の製版方法および平版印刷版用原版の製造方法

Also Published As

Publication number Publication date
EP1179425A3 (fr) 2003-09-03
US20020066383A1 (en) 2002-06-06
DE50107181D1 (de) 2005-09-29
DE10039822A1 (de) 2002-02-21
EP1179425A2 (fr) 2002-02-13
ATE302695T1 (de) 2005-09-15

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