EP0523584A1 - 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
EP0523584A1
EP0523584A1 EP92111869A EP92111869A EP0523584A1 EP 0523584 A1 EP0523584 A1 EP 0523584A1 EP 92111869 A EP92111869 A EP 92111869A EP 92111869 A EP92111869 A EP 92111869A EP 0523584 A1 EP0523584 A1 EP 0523584A1
Authority
EP
European Patent Office
Prior art keywords
printing form
printing
gas
reaction chamber
plasma
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
EP92111869A
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German (de)
English (en)
Other versions
EP0523584B1 (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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Filing date
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

  • the invention relates to a method for the regeneration of a printing form, which is preferably previously directly imaged and is suitable for offset printing, which comprises removing the imaging on the printing form and hydrophilizing the surface of the printing form.
  • 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 guide are applied to parts of the printing form surface by means of a pixel transfer unit in accordance with digital image information.
  • the 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 37 844 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.
  • Cleaning methods known from surface technology often have the disadvantage that cleaning takes place in several stages and the material is subjected to high mechanical or abrasive loads.
  • aluminum surfaces if they are to be used as printing plates, subsequently require a hydrophilization treatment, so that the regeneration requires several process steps and is therefore complex.
  • the object of the invention is to develop a method for regenerating such printing forms, the removal of the imaging and the hydrophilization being able to be carried out without damaging or attacking the surface of the printing form, and the method having 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 weight, 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.
  • Fig. 1 is a printing form cylinder and 2 is an actuating device which essentially has a nozzle burner 3 extending over the entire width of the printing form cylinder 1 and gas feed lines 4, 5 connected to the latter.
  • the printing form cylinder 1 moves under the loading device 2.
  • Hydrogen and oxygen are led by means of the gas supply line 4, 5 via the common line end piece 6 to the nozzle burner 3, where they burn.
  • the organic components of the imaging are burned off and essentially CO2 and water are formed as reaction products.
  • the water hydrophilizes the surface of the printing form.
  • the thermal load on the printing form is low.
  • 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
  • gas is located in the plasma generation (remoat) chamber and can be loaded with a power of up to 600 W. Gases are introduced into the plasma generation chamber 12 at a pressure of 0.5 to 2 mbar, preferably 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 approximately 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 required vacuum seal 14 of the reaction chamber 10 against the printing forme cylinder 8 takes place in the manner known from the sealing technology of rotary unions in the form of sliding seals or through the use of ferrofluids which are inserted into the gap between the housing of the reaction chamber 10 and the printing forme cylinder 8.
  • 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 means of UV radiation is also conceivable to prevent recontamination of the surface by organic contaminants. It is also possible to support the degradation reaction of the imaging layer initiated by radical attack during the plasma treatment by means of simultaneous UV radiation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Ink Jet (AREA)
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
DE4123959A DE4123959C1 (fr) 1991-07-19 1991-07-19
DE4123959 1991-07-19

Publications (2)

Publication Number Publication Date
EP0523584A1 true EP0523584A1 (fr) 1993-01-20
EP0523584B1 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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0570879A2 (fr) * 1992-05-20 1993-11-24 MAN Roland Druckmaschinen AG Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée
EP0693371A1 (fr) * 1994-07-22 1996-01-24 MAN Roland Druckmaschinen AG Forme d'impression effaçables et procédé pour l'effaçement et la régénération des formes
US5816161A (en) * 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
US5826511A (en) * 1996-01-12 1998-10-27 Heidelberger Druckmaschinen Ag Device for cleaning directly imaged printing forms in a printing press
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
EP1080942B2 (fr) † 1999-08-31 2009-10-14 Agfa Graphics N.V. Méthode de régénération d'une plaque d'impression lithographique

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700296B1 (fr) * 1993-01-14 1995-02-24 Nipson Procédé d'impression et presse pour la mise en Óoeuvre.
US5855173A (en) * 1995-10-20 1999-01-05 Eastman Kodak Company Zirconia alloy cylinders and sleeves for imaging and lithographic printing methods
US5839370A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Flexible zirconia alloy ceramic lithographic printing tape and method of using same
US5743188A (en) * 1995-10-20 1998-04-28 Eastman Kodak Company Method of imaging a zirconia ceramic surface to produce a lithographic printing plate
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
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
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
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
US5836248A (en) * 1997-05-01 1998-11-17 Eastman Kodak Company Zirconia-alumina composite ceramic lithographic printing member
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
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
DE10227332A1 (de) 2002-06-19 2004-01-15 Akt Electron Beam Technology Gmbh Ansteuervorrichtung mit verbesserten Testeneigenschaften
US6981767B2 (en) * 2003-01-15 2006-01-03 Ssgii, Inc. Printed item having an image with a high durability and/or resolution
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
CN1759013A (zh) * 2003-03-13 2006-04-12 味之素株式会社 图像清除方法及其设备和记录介质的再利用方法
US7319335B2 (en) 2004-02-12 2008-01-15 Applied Materials, Inc. Configurable prober for TFT LCD array testing
US6833717B1 (en) 2004-02-12 2004-12-21 Applied Materials, Inc. Electron beam test system with integrated substrate transfer module
US20050229800A1 (en) * 2004-04-20 2005-10-20 Heidelberger Druckmaschinen Ag Plate cylinder with larger diameter central image area
US7535238B2 (en) 2005-04-29 2009-05-19 Applied Materials, Inc. In-line electron beam test system
DE102005028817A1 (de) * 2005-06-22 2007-01-11 Man Roland Druckmaschinen Ag Verfahren zur Herstellung von Druckformen
US7786742B2 (en) 2006-05-31 2010-08-31 Applied Materials, Inc. Prober for electronic device testing on large area substrates
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

Citations (2)

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US4777109A (en) * 1987-05-11 1988-10-11 Robert Gumbinner RF plasma treated photosensitive lithographic printing plates
DE3713801A1 (de) * 1987-04-24 1988-11-10 Forschungsgesellschaft Fuer Dr Druckform-material fuer den flachdruck

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US5062364A (en) * 1989-03-29 1991-11-05 Presstek, Inc. Plasma-jet imaging method
DE3917844C1 (fr) * 1989-06-01 1990-10-31 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US5187046A (en) * 1991-03-18 1993-02-16 Aluminum Company Of America Arc-grained lithoplate
US5129321A (en) * 1991-07-08 1992-07-14 Rockwell International Corporation Direct-to-press imaging system for use in lithographic printing

Patent Citations (2)

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DE3713801A1 (de) * 1987-04-24 1988-11-10 Forschungsgesellschaft Fuer Dr Druckform-material fuer den flachdruck
US4777109A (en) * 1987-05-11 1988-10-11 Robert Gumbinner RF plasma treated photosensitive lithographic printing plates

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SHUZO FUJIMURA, ET AL.: "RESIST STRIPPING IN AN O2+H2O PLASMA DOWNSTREAM.", JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY: PART B., AVS / AIP, MELVILLE, NEW YORK, NY., US, vol. 09., no. 02., 1 March 1991 (1991-03-01), US, pages 357 - 361., XP000266430, ISSN: 1071-1023, DOI: 10.1116/1.585575 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0570879A2 (fr) * 1992-05-20 1993-11-24 MAN Roland Druckmaschinen AG Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée
EP0570879B1 (fr) * 1992-05-20 1997-01-02 MAN Roland Druckmaschinen AG Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée
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
EP0693371A1 (fr) * 1994-07-22 1996-01-24 MAN Roland Druckmaschinen AG Forme d'impression effaçables et procédé pour l'effaçement et la régénération des formes
US5816161A (en) * 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
US6016750A (en) * 1994-07-22 2000-01-25 Man Roland Druckmaschinen Ag Erasable printing plate and a process and apparatus for erasing and regenerating the printing plate
US6125756A (en) * 1994-07-22 2000-10-03 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free ceramic or glass surface
US5826511A (en) * 1996-01-12 1998-10-27 Heidelberger Druckmaschinen Ag Device for cleaning directly imaged printing forms in a printing press
EP1080942B2 (fr) † 1999-08-31 2009-10-14 Agfa Graphics N.V. Méthode de régénération d'une plaque d'impression lithographique

Also Published As

Publication number Publication date
JP3217464B2 (ja) 2001-10-09
CA2071773C (fr) 1996-09-17
DE4123959C1 (fr) 1993-02-04
US5317970A (en) 1994-06-07
CA2071773A1 (fr) 1993-01-20
EP0523584B1 (fr) 1995-08-23
DE59203363D1 (de) 1995-09-28
JPH05193086A (ja) 1993-08-03

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