EP1769909B1 - Méthode pour former des images sur plaques d'impression - Google Patents

Méthode pour former des images sur plaques d'impression Download PDF

Info

Publication number
EP1769909B1
EP1769909B1 EP06019304A EP06019304A EP1769909B1 EP 1769909 B1 EP1769909 B1 EP 1769909B1 EP 06019304 A EP06019304 A EP 06019304A EP 06019304 A EP06019304 A EP 06019304A EP 1769909 B1 EP1769909 B1 EP 1769909B1
Authority
EP
European Patent Office
Prior art keywords
imaging material
imaging
resolution
image data
image
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.)
Not-in-force
Application number
EP06019304A
Other languages
German (de)
English (en)
Other versions
EP1769909A1 (fr
Inventor
Dirk Probian
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
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1769909A1 publication Critical patent/EP1769909A1/fr
Application granted granted Critical
Publication of EP1769909B1 publication Critical patent/EP1769909B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B41C1/1066—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by spraying with powders, by using a nozzle, e.g. an ink jet system, by fusing a previously coated powder, e.g. with a laser

Definitions

  • the invention relates to a method for imaging rewritable printing forms according to the preamble of patent claim 1.
  • the present invention relates to a method for producing a permanent and erasable image on such a rewritable printing form, that is, a method for imaging rewritable printing forms.
  • a printing master base cylinder When producing a permanent and erasable image on such a rewritable printing form, preferably a printing master base cylinder is subjected to an erasing step and an imaging step. The imaging of the printing form is optionally followed by fixing and conditioning of the imaged printing plate.
  • the main features of DICOweb technology are " Handbuch der Printmedien, Helmut Kipphan, pages 674 to 680, year 2000, Springer-Verlag " known.
  • the process of imaging a rewritable and erasable printing form is carried out by providing an imaging material in the form of a transfer belt, the imaging material being transferred from the transfer belt to the surface of the printing form to be imaged by means of a laser.
  • a thermal transfer ribbon is for example from DE 100 23 319 A1 known.
  • the thermal transfer ribbon is kept ready in a cassette according to this prior art and when imaging the printing form unwound from the cassette, wherein only then imaging material is transferred from the transfer ribbon to the surface of the printing plate to be imaged when this is required for imaging the printing form. Therefore, depending on the printed image, a relatively large amount of imaging material remains on the thermal transfer ribbon, which, however, can not be reused.
  • Ink-jet techniques for imaging a printing form are used in the documents EP-A-1 160 082 and EP-A-0 503 621 described.
  • the present invention is based on the problem to provide a novel method for imaging rewritable printing plates.
  • a method for imaging rewritable printing plates according to claim 1 when imaging in a first step, the imaging material is sprayed onto the surface at relatively low resolution with image data, wherein in a second step the imaging material sprayed onto the surface is exposed image-based with a relatively high resolution on the surface.
  • a two-stage imaging of a rewritable printing plate wherein in a first step the imaging material is image-based or image-data-oriented sprayed onto the surface of the printing plate at a relatively low resolution, and wherein in a second step the sprayed-on imaging material is image-based or image-based .
  • Image-oriented with a relatively high resolution is exposed. Only the exposed imaging material remains on the surface of the printing form so that unexposed imaging material is removed from the printing form prior to the printing process.
  • the imaging material is applied in a targeted and metered manner to the surface of the printing form, so that imaging material can be saved in comparison with the prior art.
  • This material saving results in a cost reduction. Since the imaging material is image-based on the surface in a relatively low resolution, image-oriented spraying, the spraying is possible within a relatively short period of time.
  • the imaging material in the first step, is sprayed onto the surface of the printing plate to be imaged in an inkjet process, wherein the resolution of the image-data-controlled spraying is lower than the resolution of the printed image to be printed, and wherein in the second step the applied imaging material is image-data-oriented exposed by a laser, wherein the resolution of the laser exposure corresponds to the resolution of the printed image to be printed.
  • the present invention relates to a method for producing a permanent and erasable image on the surface of a rewritable and erasable printing form, wherein the method is preferably carried out within a printing press.
  • the method according to the invention can also be carried out outside a printing press.
  • the method according to the invention can be used both in rewritable printing plates and in rewritable printing sleeves.
  • a printing plate is provided and possibly subjected to an erasing step beforehand in the area of its surface, wherein subsequent to the erasing an imaging of the surface of the printing plate is carried out by applying to the surface of the printing plate an imaging material, in particular a polymer-like imaging material is applied.
  • the imaging material is sprayed image-oriented onto the surface of the printing form, preferably with the aid of an inkjet process.
  • the spraying the imaging material on the surface of the printing form takes place in a relatively low resolution, which is lower than the resolution of the printed image to be printed.
  • data of low resolution is generated by screening or filtering from high-resolution print image data, the spraying of the imaging material being carried out on the basis of this generated low-resolution data.
  • the imaging material sprayed onto the surface is image-imagewise exposed, preferably in the sense of a laser exposure process, wherein this exposure as well as the spraying of the imaging material is image-oriented, but unlike the spraying of the imaging material with a relatively high resolution, which preferably corresponds to the resolution of the printed image to be printed.
  • Unexposed imaging material is removed from the surface of the printing form, in particular in the sense of a cleaning process using a fountain solution or a cleaning cloth.
  • imaging material is image-image-oriented sprayed onto the surface of the printing plate and in a second step the sprayed-on imaging material is exposed image-oriented.
  • the spraying of the imaging material is done at a relatively low resolution, exposing it to a relatively high resolution.
  • both the image-data-oriented spraying of the imaging material on the surface of the printing form and the image-data-oriented exposure of the imaging material are carried out in a traversing manner, that is, offset in time and space.
  • corresponding devices namely a spraying device and an exposure device, are positioned on a traverse, in which case the devices during imaging in a rotationally driven printing form are moved in translation in the axial direction of the printing form at the same.
  • Sections of the surface of the printing form to be imaged sprayed with imaging material and then exposed.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Rotary Presses (AREA)
  • Ink Jet (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (9)

  1. °) Procédé d'illustration d'une plaque d'impression notamment dans une machine d'impression selon lequel on fournit une plaque d'impression avec une surface réinscriptible et on applique une matière d'illustration à la surface de la plaque d'impression pour obtenir une image permanente et effaçable,
    caractérisé en ce que
    lors de l'illustration, dans une première étape, on pulvérise la matière d'illustration suivant une orientation selon les données d'image avec une résolution relativement faible à la surface et ensuite dans une seconde étape, on expose la matière d'illustration pulvérisée à la surface, en procédant de façon orientée selon les données d'image avec une résolution relativement élevée à la surface.
  2. °) Procédé selon la revendication 1,
    caractérisé en ce que
    dans la première étape, la résolution de la pulvérisation de la matière d'illustration orientée selon les données d'image, est inférieure à la résolution de l'image d'impression ou image à imprimer.
  3. °) Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    dans la première étape, on pulvérise la matière d'illustration sur la surface par un procédé à jet d'encre.
  4. °) Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    dans une seconde étape, la résolution de l'exposition correspond à la résolution de l'image d'impression à imprimer.
  5. °) Procédé selon la revendication 4,
    caractérisé en ce que
    dans la seconde étape, on expose la matière d'illustration par un procédé d'exposition par laser.
  6. °) Procédé selon l'une des revendications 1 à 5,
    caractérisé en ce que
    l'on effectue la pulvérisation orientée selon les données d'image de la matière d'illustration à la surface et l'exposition orientée selon les données d'image de la matière d'illustration à la surface, en procédant de manière transversale, et des installations correspondantes prévues sur une traverse sont déplacées devant la plaque d'impression, en translation dans la direction axiale pendant que la plaque d'impression tourne.
  7. °) Procédé selon la revendication 6,
    caractérisé en ce que
    la pulvérisation orientée selon les données d'image de la matière d'illustration à la surface et l'exposition orientée selon les données d'image de la matière d'illustration à la surface sont des opérations effectuées de manière décalée dans le temps et dans l'espace.
  8. °) Procédé selon l'une des revendications 1 à 7,
    caractérisé en ce que
    pour effectuer la pulvérisation de la matière d'illustration, d'une façon orientée selon les données d'image, avec des données d'image d'impression disponibles avec une résolution plus élevée, on procède par tramage ou filtrage pour obtenir des données de résolution plus faibles et la pulvérisation de la matière d'illustration se fait sur le fondement de ces données de résolution plus faibles.
  9. °) Procédé selon l'une des revendications 1 à 8,
    caractérisé en ce qu'
    on enlève la matière d'illustration non exposée de la surface de la plaque d'impression.
EP06019304A 2005-09-28 2006-09-15 Méthode pour former des images sur plaques d'impression Not-in-force EP1769909B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005046242A DE102005046242A1 (de) 2005-09-28 2005-09-28 Verfahren zum Bebildern von Druckformen

Publications (2)

Publication Number Publication Date
EP1769909A1 EP1769909A1 (fr) 2007-04-04
EP1769909B1 true EP1769909B1 (fr) 2008-06-11

Family

ID=37635633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06019304A Not-in-force EP1769909B1 (fr) 2005-09-28 2006-09-15 Méthode pour former des images sur plaques d'impression

Country Status (4)

Country Link
US (1) US7895945B2 (fr)
EP (1) EP1769909B1 (fr)
JP (1) JP2007090880A (fr)
DE (2) DE102005046242A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269834A1 (fr) 2009-06-30 2011-01-05 WIFAG Maschinenfabrik AG Procédé et dispositif de modification d'une image d'impression sur une plaque d'impression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007183A1 (de) * 2007-02-14 2008-08-21 Man Roland Druckmaschinen Ag Verfahren zur Herstellung von Druckformen
DE102011109083A1 (de) * 2011-08-01 2013-02-07 Heidelberger Druckmaschinen Aktiengesellschaft Inkjet-Laserhärtung
CN109720079B (zh) * 2018-09-29 2021-02-19 杭州运城制版有限公司 一种均匀细线条电子雕刻处理工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04282249A (ja) * 1991-03-12 1992-10-07 Nippon Paint Co Ltd インクジェット方式による平版のダイレクト製版方法とその装置
JPH11203101A (ja) * 1998-01-19 1999-07-30 Riso Kagaku Corp コンピュータ・インターフェース装置および孔版印刷機用出力データの作成方法
DE10023319B4 (de) 2000-05-12 2008-07-10 Man Roland Druckmaschinen Ag Verfahren zum Umspulen von Thermotransferband zum Bebildern von Druckformen
JP3422754B2 (ja) * 2000-05-31 2003-06-30 三菱重工業株式会社 印刷用版材の作製方法、再生方法及び印刷機
US6723491B2 (en) * 2000-07-05 2004-04-20 Kba (Advanced Imaging Technology) (Israel) Limited Utilizing UV to form and decompose a printing member
DE10032703A1 (de) * 2000-07-05 2002-01-17 Koenig & Bauer Ag Verfahren und Einrichtung in Druckmaschinen zum Bebildern von Oberflächen
DE10039817A1 (de) 2000-08-09 2002-02-21 Koenig & Bauer Ag Bilderzeugungseinrichtung
DE10217172A1 (de) 2002-04-18 2003-10-30 Koenig & Bauer Ag Verfahren zum Behandeln von erneut bebilderbaren Druckformen oder Druckformzylindern in Druckmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269834A1 (fr) 2009-06-30 2011-01-05 WIFAG Maschinenfabrik AG Procédé et dispositif de modification d'une image d'impression sur une plaque d'impression

Also Published As

Publication number Publication date
JP2007090880A (ja) 2007-04-12
US20070068411A1 (en) 2007-03-29
DE502006000897D1 (de) 2008-07-24
DE102005046242A1 (de) 2007-03-29
EP1769909A1 (fr) 2007-04-04
US7895945B2 (en) 2011-03-01

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