EP1629991A2 - Procedure et dispositif d'effacement d'images sur une plaque d'impression - Google Patents

Procedure et dispositif d'effacement d'images sur une plaque d'impression Download PDF

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Publication number
EP1629991A2
EP1629991A2 EP05018121A EP05018121A EP1629991A2 EP 1629991 A2 EP1629991 A2 EP 1629991A2 EP 05018121 A EP05018121 A EP 05018121A EP 05018121 A EP05018121 A EP 05018121A EP 1629991 A2 EP1629991 A2 EP 1629991A2
Authority
EP
European Patent Office
Prior art keywords
printing form
printing
grinding
rewritable
erased
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.)
Withdrawn
Application number
EP05018121A
Other languages
German (de)
English (en)
Other versions
EP1629991A3 (fr
Inventor
Marek Jirous
Stephan Fischer
Andreas Schiller
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
Manroland AG
MAN Roland Druckmaschinen 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 Manroland AG, MAN Roland Druckmaschinen AG filed Critical Manroland AG
Publication of EP1629991A2 publication Critical patent/EP1629991A2/fr
Publication of EP1629991A3 publication Critical patent/EP1629991A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/22—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B19/223—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground of paper or similar sheet material, e.g. perforating, cutting by means of a grinding wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • 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 erasing a printing form according to the preamble of patent claim 1.
  • the invention further relates to a device for erasing a printing form according to the preamble of patent claim 10.
  • the present invention relates to a method and apparatus for erasing a permanent image on such a rewritable printing form.
  • a printing master base cylinder is preferably subjected to an erasing step or a deposing step and to a subsequent imaging step.
  • the basic features of the DICOweb technology are described in "Handbuch der Printmedien, Helmut Kipphan, pages 674 to 680, year 2000, Springer-Verlag".
  • An erase device which can be used when deleting a rewritable printing form is disclosed, for example, in DE 100 08 214 A1.
  • the erasing device for rewritable printing plates comprises a cleaning cloth, wherein the cleaning cloth is unwound from a fresh cloth roll, is pressed against the surface of the printing form to be erased by a pressing element and then a used cleaning cloth is wound up on a dirty cloth roll.
  • the cleaning cloth is used to erase a printing form moistened with chemicals that detach the image to be removed from the surface of the rewritable printing form.
  • the image on the surface of the printing plate is erased by chemical means.
  • the surface quality of the printing plate can be negatively affected, whereby ultimately a complete replacement of a printing plate may be required.
  • the deletion of rewritable printing plates with the device known from the prior art using chemicals is therefore altogether disadvantageous.
  • the present invention is based on the problem to provide a novel method and a corresponding device for erasing a printing form.
  • the image is ground off the surface of the rewritable printing form, for which purpose a rotating grinding device is preferably applied to the surface of the rotationally driven printing form, and wherein during grinding on the surface removed polymer is preferably sucked from the surface of the printing plate.
  • the surface of the printing form is sanded so reproducibly (uniform roughness).
  • Abrasion is a mechanical erasure process which, in contrast to the chemical extinguishing process known from the prior art, does not adversely affect the surface finish of the printing form.
  • Another advantage of such a mechanical erasing of the printing plate is the fact that on the printing plate a more stable polymer can be used for the imaging process, which would not be replaced by chemical means. This has advantages for the entire printing process, in particular, the run resistance is then higher.
  • a fluid preferably distilled water, possibly with additives, is applied to the surface of the rewritable printing plate for grinding.
  • Polymer abraded during grinding on the surface of the rewritable printing form is sucked off the surface together with the fluid and the printing form material possibly resulting from the grinding.
  • the inventive device for erasing a printing form is defined in the independent claim 10.
  • FIG. 1 shows in highly schematic form a printing plate 11 positioned on a printing cylinder 10, which is imaged on its surface 12 with a permanent image.
  • the printing form 11 is a so-called Formsleeve, which is designed erasable and rewritable.
  • Such a printing form is used in digital printing machines marketed by the applicant under the product name "DICOweb".
  • the present invention now relates to a method and a device for erasing such erasable and rewritable printing forms in the region of their surface and thus preparing them for a new imaging process.
  • the Entippoungsvorgang is carried out here within the printing press, but is of course also possible outside the printing press.
  • the printing plate 11 is rotationally driven about a longitudinal central axis thereof, wherein the direction of rotation of the printing plate 11 is visualized in Fig. 1 by the arrow 13.
  • a likewise rotating grinding device 14 is employed on the surface 12 of the rotationally driven printing plate 11.
  • the grinding device 14 is preferably designed as a motor-driven grinding roller, which removes the permanent image on the surface 12 of the printing plate 11 by mechanical means. 1, the grinding device 14 rotates opposite to the printing forme 11, the direction of rotation of the grinding device 14 being represented in FIG. 1 by the arrow 15 (the direction of rotation may also be synchronous).
  • the rotary grinder 14 during grinding relative to the stationary, but also rotating printing plate 11 along the axial width of the erasing or to entrecinden surface 12 of the printing form 11 traversing moves.
  • the grinding device 14 accordingly has an axial width or extension which is smaller than the axial width of the surface 12 of the printing form 11 to be erased or de-imprinted. This is shown in particular in FIG.
  • the grinding device 14 is mounted on a crosspiece 16, the grinding device 14 being moved in the direction of the double arrow 17 relative to the stationary, but rotating printing plate 11.
  • the traverse 16 is assigned a drive 18.
  • the rotational movement of the traversing device 16 traversing the grinding device 14 is provided by a further drive 19, which is movable together with the grinding device 14 along the traverse 16.
  • the removed by the grinding device 14 from the surface 12 of the printing plate 11 polymer material of the image to be deleted is sucked in the sense of the present invention of the surface 12 of the spinning mold 11.
  • the grinding device 14 is positioned in a suction chamber 20, from which ultimately the abraded polymer material of the image to be erased is sucked off via a suction tube 21. This ensures that removed from the surface 12 polymer material of the image to be deleted from the area of the printing plate 11 and the grinding device 14 is removed.
  • a fluid namely distilled water, possibly with additives
  • a feed device 22 by means of which distilled water can be brought into the region of the grinding point between the grinding device 14 and the surface 12 of the printing form 11 to be erased.
  • the feeding of distilled water can improve the effectiveness of grinding.
  • the use of chemicals to delete the printing plate 11 is omitted, the surface texture of the printing forme 11 to be deleted is not adversely affected.
  • the de-forming unit 23 may, for example, as described in DE 100 08 214 A1, and thus comprise a cleaning cloth 24, which can be unwound from a Frischischtuchrolle 25, pressed by a pressure roller 26 to the surface 12 of the printing form to be deleted and then to a Dirty cloth roll 27 can be wound up.
  • the de-forming unit 23 known from the prior art can be used to apply distilled water to the surface 12 of the printing forme 11 to be erased by means of the cleaning cloth 24.
  • the grinder 14 moves traversing relative to the stationary, but rotating printing plate 11 during the deletion process.
  • a grinding device whose axial width is adapted to the axial extent of the printing form to be deleted or the surface of the printing form to be deleted. In this case, then the grinding device would be formed stationary and the printing plate and the grinding device would only be driven to rotate.
  • a permanent image on a surface of an erasable and rewritable printing form in that the image is ground off the surface of the printing form.
  • distilled water possibly with additives, may be used which is applied to the surface to be quenched.
  • the abraded surface of the polymer material of the image is sucked together with the distilled water, possibly with additives, from the surface of the printing plate and optionally removed via a cleaning cloth from the surface of the printing plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Cleaning In Electrography (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Cleaning In General (AREA)
EP05018121A 2004-08-28 2005-08-20 Procedure et dispositif d'effacement d'images sur une plaque d'impression Withdrawn EP1629991A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004041752A DE102004041752A1 (de) 2004-08-28 2004-08-28 Verfahren und Vorrichtung zum Entbildern einer Druckform

Publications (2)

Publication Number Publication Date
EP1629991A2 true EP1629991A2 (fr) 2006-03-01
EP1629991A3 EP1629991A3 (fr) 2009-03-11

Family

ID=35229611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05018121A Withdrawn EP1629991A3 (fr) 2004-08-28 2005-08-20 Procedure et dispositif d'effacement d'images sur une plaque d'impression

Country Status (6)

Country Link
US (1) US20060042490A1 (fr)
EP (1) EP1629991A3 (fr)
JP (1) JP2006062362A (fr)
CN (1) CN1769048A (fr)
CA (1) CA2517329A1 (fr)
DE (1) DE102004041752A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159051A2 (fr) * 2008-09-02 2010-03-03 Fischer & Krecke GmbH Procédé de recyclage de la surface d'un cylindre dans une presse rotative

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012109071A1 (de) * 2012-09-26 2014-03-27 Contitech Elastomer-Beschichtungen Gmbh Schleifverfahren für Druckformen im Flexo- oder Hochdruckbereich
CN111331452B (zh) * 2020-04-02 2020-11-03 广东嘉元科技股份有限公司 一种阴极辊在线研磨专用负压吸尘腔结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431868C (de) * 1924-11-07 1926-07-17 Johann Friedrich Tutzschke Verfahren zur Herstellung und Auffrischung von ausgedruckten metallenen Flachdruckplatten
US2495269A (en) * 1945-01-26 1950-01-24 Johnson & Borsell Ab Machine for preparing lithographic or other printing plates as well as rubber sheets used in offset printing
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
DE19930373A1 (de) * 1998-07-02 2000-02-17 Shinano Electric Refining Co Poröses Polierwerkzeug und Verfahren zum Polieren einer Walze
EP1593496A2 (fr) * 2004-05-05 2005-11-09 MAN Roland Druckmaschinen AG Procédé et dispositif pour réaliser des surfaces d'impression

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783779A (en) * 1969-07-25 1974-01-08 Hallmark Cards Rotary screen printing cylinder
US4716687A (en) * 1985-02-22 1988-01-05 Mitsubishi Jukogyo Kabushiki Kaisha Method and apparatus for grinding a rotary body
US6696221B1 (en) * 1997-05-19 2004-02-24 Day International, Inc. Printing plate and method of making using digital imaging photopolymerization
DE10008214B4 (de) * 2000-02-23 2006-10-12 Man Roland Druckmaschinen Ag Lösch- und Reinigungsvorrichtung für zylindrische Oberflächen, insbesondere von Druckform- und Gummituchzylindern einer Druckmaschine
US7021990B2 (en) * 2003-08-19 2006-04-04 Htt Hauser Tripet Tschudin Ag Method and apparatus for circular grinding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431868C (de) * 1924-11-07 1926-07-17 Johann Friedrich Tutzschke Verfahren zur Herstellung und Auffrischung von ausgedruckten metallenen Flachdruckplatten
US2495269A (en) * 1945-01-26 1950-01-24 Johnson & Borsell Ab Machine for preparing lithographic or other printing plates as well as rubber sheets used in offset printing
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
DE19930373A1 (de) * 1998-07-02 2000-02-17 Shinano Electric Refining Co Poröses Polierwerkzeug und Verfahren zum Polieren einer Walze
EP1593496A2 (fr) * 2004-05-05 2005-11-09 MAN Roland Druckmaschinen AG Procédé et dispositif pour réaliser des surfaces d'impression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159051A2 (fr) * 2008-09-02 2010-03-03 Fischer & Krecke GmbH Procédé de recyclage de la surface d'un cylindre dans une presse rotative
EP2159051A3 (fr) * 2008-09-02 2012-01-04 Fischer & Krecke GmbH Procédé de recyclage de la surface d'un cylindre dans une presse rotative

Also Published As

Publication number Publication date
CA2517329A1 (fr) 2006-02-28
US20060042490A1 (en) 2006-03-02
EP1629991A3 (fr) 2009-03-11
CN1769048A (zh) 2006-05-10
JP2006062362A (ja) 2006-03-09
DE102004041752A1 (de) 2006-03-23

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