EP0523584B1 - Procédé pour la régénération de formes d'impression offset avec image directe - Google Patents

Procédé pour la régénération de formes d'impression offset avec image directe Download PDF

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Publication number
EP0523584B1
EP0523584B1 EP92111869A EP92111869A EP0523584B1 EP 0523584 B1 EP0523584 B1 EP 0523584B1 EP 92111869 A EP92111869 A EP 92111869A EP 92111869 A EP92111869 A EP 92111869A EP 0523584 B1 EP0523584 B1 EP 0523584B1
Authority
EP
European Patent Office
Prior art keywords
printing forme
printing
process according
gas
reaction chamber
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
EP92111869A
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German (de)
English (en)
Other versions
EP0523584A1 (fr
Inventor
Barbara Nüssel
Hartmut Fuhrmann
Horst Dauer
Reinhard Plaschka
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
MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0523584A1 publication Critical patent/EP0523584A1/fr
Application granted granted Critical
Publication of EP0523584B1 publication Critical patent/EP0523584B1/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
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • 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

  • One way of transferring information to a printing plate or cylinder suitable for offset printing is to transfer electronically stored information, such as texts or images, directly.
  • electronically stored information such as texts or images
  • organic substances influencing the color guidance are applied to parts of the printing form surface by means of a pixel transfer unit in accordance with digital image information.
  • the applied parts of the substance with their oleophilic properties mark the ink-bearing parts of the printed image.
  • the previously hydrophilic plate surface is made hydrophobic at the transfer points.
  • the application can be carried out, for example, by means of ink-jet, electrostatic or, as proposed in DE-PS 39 17 844 by the same applicant, thermal transfer processes.
  • Both a printing plate, preferably anodized, hydrophilized aluminum plate, and a printing cylinder, the outer surface of which has hydrophilic properties, can serve as the printing form.
  • Both a pressure cylinder with a cylinder jacket made of ceramic (preferably Al2O3, but also Cr2O3, ZrSiO4 or Al-Mg silicate), as well as a solid ceramic or glass cylinder can be used.
  • the object of the invention is to develop a method for the regeneration of such printing forms, the removal of the imaging and the hydrophilization can be carried out without damaging or attacking the surface of the printing form and the method has fewer steps.
  • the reactive species (oxygen ions and radicals) formed during the high-frequency excitation of the process gas and the resulting UV radiation are essentially responsible for the chemical reaction on the material surface.
  • High-molecular components of the imagewise applied material "crack" by oxidative and / or photolytic attack.
  • the resulting volatile reaction products are removed using a suction device. Any physical attack on the printing form surface is avoided.
  • the reactive cleaning processes for surfaces include, above all, corona treatment, UV radiation or treatment with a detonating gas flame.
  • low-pressure plasma and flame treatment are common methods for improving the adhesive strength of plastic surfaces in particular when painting, printing or coating.
  • plasma treatment is used, among other things. successfully used for photoresist stripping and surface cleaning.
  • the printing form cylinder to be deleted is preferably moved under the nozzle burner 3 at 20 mm per second.
  • the distance between the nozzle burner 3 and the surface of the printing form cylinder 1 is usually 10 to 50 mm.
  • the nozzles of the nozzle burner 3 are offset from one another in a row (see FIG. 2).
  • the volatile substances formed on the surface of the printing form 1 during the reactive deletion of the substance parts are discharged via a suction device, which is not shown for reasons of clarity and is connected downstream of the application device 2.
  • the nozzle burner 3 covers the entire width of the printing form 1.
  • a nozzle burner with only one punctiform nozzle opening which is moved axially along the printing form 1 while the printing form 1 passes underneath it rotates and the nozzle burner thus machined the surface of the printing form 1.
  • FIG. 3 shows a second example of a reactive method for regeneration of a printing form.
  • a printing form cylinder 8 moves under an application device 9 in the manner shown.
  • This essentially has a reaction chamber 10 which is arranged over the entire width of the surface of the printing form cylinder 8 in the manner shown and gas lines 11 which on the one hand open into the reaction chamber 10 and on the other hand connect the reaction chamber 10 to a plasma generation chamber 12.
  • a high-frequency generator magnet
  • gases are introduced into the plasma generation chamber 12 at a pressure of 50 to 200 Pa (0.5 to 2 mbar), preferably 80 to 140 Pa (0.8 to 1.4 mbar).
  • Oxygen or an oxygen / CF4 mixture is preferably used as the reaction gas.
  • a gas discharge is ignited by applying a high-frequency alternating voltage in the GHz range in the microwave range of preferably 2.45 GHz. This creates the plasma.
  • the plasma also contains ions, electrons and uncharged reaction gas molecules.
  • UV light is created as a result of recombination processes.
  • This plasma is fed via the gas lines 11 to the reaction chamber 10, which is evacuated to about 50 Pa (0.5 mbar) by means of a high vacuum pump 13.
  • the surface of the printing form cylinder 8 offers the chemical radicals the opportunity to make new connections.
  • the spatial separation of the plasma generator 12 and the reaction chamber 10 is due to the fact that the microwave sealing against a rotating cylinder is problematic. If the plasma generation chamber 12 and reaction chamber 10 are separated, only a static, microwave seal on the remoate chamber 12 is necessary. The seal the reaction chamber 10 against the rotating cylinder need only be a vacuum seal 14.
  • the illustrated areas e.g. be pretreated with ultrasound in various solvents or cleaning agents.
  • Post-treatment with ultrasound to remove inorganic constituents loosely adhering to the surface after the plasma treatment is also conceivable.
  • Aftertreatment of the printing form surface, which can be wetted very well after the plasma treatment, by UV radiation to prevent recontamination of the surface by organic contaminants is also conceivable. It is also possible to support the degradation reaction of the imaging layer initiated by radical attack during the plasma treatment by simultaneous UV irradiation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Ink Jet (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (7)

  1. Procédé pour la régénération réversible réitérée de formes d'impression, sur lesquelles intervient de préférence au préalable une formation directe de l'image et qui sont appropriées pour l'impression offset, et qui inclut l'élimination de l'image formée sur la forme d'impression et une hydrophilisation de la surface de la forme d'impression, caractérisé en ce qu'on applique à la forme d'impression (1,8) un gaz de traitement ionisé, à l'aide d'un dispositif d'application (2,9), un effacement réactif de l'image formée et l'hydrophilisation simultanée étant exécutés en une étape opératoire, tandis que les produits de réaction volatils, qui apparaissent, sont évacués au moyen d'un dispositif d'aspiration (13).
  2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise comme gaz de traitement un gaz combustible, la forme d'impression (1) étant chargée sur toute sa surface par l'intermédiaire d'un brûleur à tuyères (3), pendant que la forme d'impression (1) se déplace au-dessous du brûleur à tuyères (3).
  3. Procédé selon la revendication 2, caractérisé en ce qu'on utilise comme gaz combustible de préférence un mélange oxygène/hydrogène riche en oxygène, et qu'on déplace un cylindre porte-cliché (1), de préférence à une vitesse de 20 mm par seconde, au-dessous du brûleur à tuyères (3), la distance entre le brûleur à tuyères (3) et la surface de la forme d'impression (1) étant comprise de préférence entre 10 et 50 mm.
  4. Procédé selon la revendication 1, caractérisé en ce qu'on utilise comme gaz de traitement, un plasma, qui est dirigé sur la forme d'impression (8) au moyen d'une chambre de réaction (10) dans laquelle le vide a été établi et qui s'étend sur toute la largeur de la forme d'impression (8) et est fermée, d'une manière étanche vis-à-vis de la forme d'impression (8) au moyen d'une garniture d'étanchéité au vide (14).
  5. Procédé selon la revendication 4, caractérisé en ce que le plasma est produit dans un générateur de plasma (12), qui est séparé localement de la chambre de réaction (10), de préférence à l'aide d'une tension alternative à haute fréquence dans la gamme des GHz, et est envoyé à la chambre de réaction (10) par l'intermédiaire de canalisations de gaz (11).
  6. Procédé selon la revendication 4, caractérisé en ce que pour la fabrication du plasma, on utilise de préférence de l'oxygène ou un mélange oxygène/gaz CF₄.
  7. Procédé selon la revendication 4, caractérisé en ce qu'on réalise le vide dans la chambre de réaction (10) à l'aide d'une pompe à vide poussé (13), à une pression égale de préférence à 50 Pa (0,5 mbar).
EP92111869A 1991-07-19 1992-07-13 Procédé pour la régénération de formes d'impression offset avec image directe Expired - Lifetime EP0523584B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4123959 1991-07-19
DE4123959A DE4123959C1 (fr) 1991-07-19 1991-07-19

Publications (2)

Publication Number Publication Date
EP0523584A1 EP0523584A1 (fr) 1993-01-20
EP0523584B1 true EP0523584B1 (fr) 1995-08-23

Family

ID=6436542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111869A Expired - Lifetime EP0523584B1 (fr) 1991-07-19 1992-07-13 Procédé pour la régénération de formes d'impression offset avec image directe

Country Status (5)

Country Link
US (1) US5317970A (fr)
EP (1) EP0523584B1 (fr)
JP (1) JP3217464B2 (fr)
CA (1) CA2071773C (fr)
DE (2) DE4123959C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7746088B2 (en) 2005-04-29 2010-06-29 Applied Materials, Inc. In-line electron beam test system
US7786742B2 (en) 2006-05-31 2010-08-31 Applied Materials, Inc. Prober for electronic device testing on large area substrates
US7847566B2 (en) 2004-02-12 2010-12-07 Applied Materials, Inc. Configurable prober for TFT LCD array test
US7919972B2 (en) 2004-02-12 2011-04-05 Applied Materials, Inc. Integrated substrate transfer module
US8208114B2 (en) 2002-06-19 2012-06-26 Akt Electron Beam Technology Gmbh Drive apparatus with improved testing properties

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Publication number Priority date Publication date Assignee Title
DE4216636C2 (de) * 1992-05-20 1995-11-23 Roland Man Druckmasch Verfahren und Vorrichtung zum Löschen und Hydrophilieren einer mittels eines Thermotransverfahrens bebilderten Druckform
US6006666A (en) * 1992-05-20 1999-12-28 Man Roland Druckmaschinen Ag Method and apparatus for erasing the ink-carrying layer from the surface of an image-containing printing form
FR2700296B1 (fr) * 1993-01-14 1995-02-24 Nipson Procédé d'impression et presse pour la mise en Óoeuvre.
DE4426012C2 (de) * 1994-07-22 1998-05-20 Roland Man Druckmasch Löschbare Druckform, ihre Verwendung sowie Verfahren zum Löschen und Regenerieren der Druckform
US5816161A (en) * 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
US5855173A (en) * 1995-10-20 1999-01-05 Eastman Kodak Company Zirconia alloy cylinders and sleeves for imaging and lithographic printing methods
US5839369A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Method of controlled laser imaging of zirconia alloy ceramic lithographic member to provide localized melting in exposed areas
US5743188A (en) * 1995-10-20 1998-04-28 Eastman Kodak Company Method of imaging a zirconia ceramic surface to produce a lithographic printing plate
US5839370A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Flexible zirconia alloy ceramic lithographic printing tape and method of using same
US5836249A (en) * 1995-10-20 1998-11-17 Eastman Kodak Company Laser ablation imaging of zirconia-alumina composite ceramic printing member
US5870956A (en) * 1995-12-21 1999-02-16 Eastman Kodak Company Zirconia ceramic lithographic printing plate
DE19600844A1 (de) * 1996-01-12 1997-07-17 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung direkt bebilderter Druckformen in einer Druckmaschine
DE19600846C1 (de) * 1996-01-12 1997-04-03 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung direkt bebilderter Druckformen in einer Druckmaschine
DE19602328A1 (de) * 1996-01-24 1997-07-31 Roland Man Druckmasch Verfahren zum Bebildern einer löschbaren Druckform
US5836248A (en) * 1997-05-01 1998-11-17 Eastman Kodak Company Zirconia-alumina composite ceramic lithographic printing member
US5893328A (en) * 1997-05-01 1999-04-13 Eastman Kodak Company Method of controlled laser imaging of zirconia-alumina composite ceramic lithographic printing member to provide localized melting in exposed areas
US5927207A (en) * 1998-04-07 1999-07-27 Eastman Kodak Company Zirconia ceramic imaging member with hydrophilic surface layer and methods of use
DE19826377A1 (de) * 1998-06-12 1999-12-16 Heidelberger Druckmasch Ag Druckmaschine und Druckverfahren
DE19932071A1 (de) * 1998-07-22 2000-01-27 Heidelberger Druckmasch Ag Vorrichtung und Verfahren zur Bebilderung einer Druckform für eine Offsetdruckmaschine
US6408755B1 (en) 1999-08-31 2002-06-25 Agfa-Gavaert Method for erasing a lithographic printing master
DE69913518T2 (de) * 1999-08-31 2004-11-11 Agfa-Gevaert Verfahren zur Erneuerung einer Flachdruckplatte
DE10037998A1 (de) * 2000-08-04 2002-02-14 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Löschen einer wiederbebilderbaren Druckform
DE10039818A1 (de) * 2000-08-09 2002-02-21 Koenig & Bauer Ag Verfahren zur Erzeugung einer Druckmaschinen-Druckform
DE10115435B8 (de) * 2001-03-29 2007-02-08 Maschinenfabrik Wifag Verfahren zur Erzeugung eines Druckbilds und/oder zur Löschung eines Druckbilds einer Nassoffset-Druckform mit fotothermisch veränderbarem Material
DE10132204A1 (de) * 2001-07-03 2003-01-30 Oce Printing Systems Gmbh Verfahren und Vorrichtung zum Erzeugen unterschiedlicher Druckbilder auf demselben Druckträger
US6610458B2 (en) 2001-07-23 2003-08-26 Kodak Polychrome Graphics Llc Method and system for direct-to-press imaging
US20040135828A1 (en) * 2003-01-15 2004-07-15 Schmitt Stephen E. Printer and method for printing an item with a high durability and/or resolution image
US6981767B2 (en) * 2003-01-15 2006-01-03 Ssgii, Inc. Printed item having an image with a high durability and/or resolution
DE602004014110D1 (de) * 2003-03-13 2008-07-10 Ajinomoto Kk Bildlöschverfahren, vorrichtung dafür und recyclingverfahren für aufzeichnungsmedium
US20050229800A1 (en) * 2004-04-20 2005-10-20 Heidelberger Druckmaschinen Ag Plate cylinder with larger diameter central image area
DE102005028817A1 (de) * 2005-06-22 2007-01-11 Man Roland Druckmaschinen Ag Verfahren zur Herstellung von Druckformen
TW200814170A (en) * 2006-09-13 2008-03-16 Ind Tech Res Inst Method of adjusting surface characteristic of a substrate
US20080136887A1 (en) * 2006-12-11 2008-06-12 Schmitt Stephen E Printed item having an image with a high durability and/or resolution
DE102007024611A1 (de) * 2007-05-25 2008-11-27 Manroland Ag Verfahren und Vorrichtung zur Herstellung eines permanenten sowie löschbaren Bilds auf einer Druckform
DE102010013100A1 (de) * 2009-11-06 2011-05-12 Christian Maass Feinstaubabsaugeeinrichtung
JP2016037420A (ja) 2014-08-08 2016-03-22 日本碍子株式会社 オゾン発生器及びその故障診断方法
JP2016037419A (ja) 2014-08-08 2016-03-22 日本碍子株式会社 オゾン発生器

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US5129321A (en) * 1991-07-08 1992-07-14 Rockwell International Corporation Direct-to-press imaging system for use in lithographic printing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8208114B2 (en) 2002-06-19 2012-06-26 Akt Electron Beam Technology Gmbh Drive apparatus with improved testing properties
US7847566B2 (en) 2004-02-12 2010-12-07 Applied Materials, Inc. Configurable prober for TFT LCD array test
US7919972B2 (en) 2004-02-12 2011-04-05 Applied Materials, Inc. Integrated substrate transfer module
US7746088B2 (en) 2005-04-29 2010-06-29 Applied Materials, Inc. In-line electron beam test system
US7786742B2 (en) 2006-05-31 2010-08-31 Applied Materials, Inc. Prober for electronic device testing on large area substrates

Also Published As

Publication number Publication date
JPH05193086A (ja) 1993-08-03
DE4123959C1 (fr) 1993-02-04
US5317970A (en) 1994-06-07
DE59203363D1 (de) 1995-09-28
JP3217464B2 (ja) 2001-10-09
EP0523584A1 (fr) 1993-01-20
CA2071773C (fr) 1996-09-17
CA2071773A1 (fr) 1993-01-20

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