EP1386732B1 - Procédé et dispositif pour produire une forme d'impression d'une rotatif à imprimer - Google Patents

Procédé et dispositif pour produire une forme d'impression d'une rotatif à imprimer Download PDF

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Publication number
EP1386732B1
EP1386732B1 EP20030015246 EP03015246A EP1386732B1 EP 1386732 B1 EP1386732 B1 EP 1386732B1 EP 20030015246 EP20030015246 EP 20030015246 EP 03015246 A EP03015246 A EP 03015246A EP 1386732 B1 EP1386732 B1 EP 1386732B1
Authority
EP
European Patent Office
Prior art keywords
medium flow
medium
printing plate
plate cylinder
laser
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
EP20030015246
Other languages
German (de)
English (en)
Other versions
EP1386732A1 (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 EP1386732A1 publication Critical patent/EP1386732A1/fr
Application granted granted Critical
Publication of EP1386732B1 publication Critical patent/EP1386732B1/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
    • 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 producing a printing forme for a rotary printing machine by imagewise controlled coating a surface of a printing forme cylinder with image-bearing elements, which are applied by means of one or more laser beams of a movable along the printing cylinder laser writing head on the surface of the rotating printing forme cylinder. Furthermore, the invention includes an apparatus for carrying out the method.
  • the transfer belt is used in a width which has a plurality of tracks next to one another for a plurality of images, so that a transfer belt has a longer service life than the solution known hitherto.
  • the tape transport mechanism has a supply and a take-up reel so that the transfer tape is unwound from the supply reel and wound onto the take-up reel (or vice versa). When all traces of tape are used up, the machine must be stopped and a tape change made.
  • the object of the invention is therefore to provide a method and an apparatus for carrying out the method, in which / a larger number Bercisungen can be done without changing the transfer element.
  • This object is achieved with a method mentioned in the introduction, in which a medium flow is generated in which constituents (particles) with the image-carrying properties are contained, in which the medium flow is passed continuously or pulsed through a machining gap between the laser writing head and the surface of the printing-plate cylinder, and at the laser beams penetrate the medium flow while components are deposited with image-bearing properties from the medium and formed on the printing form cylinder.
  • a continuous or pulsed flow of a medium is generated, are contained in the particles or having image-bearing properties.
  • This current can e.g. be passed through a supply or conduction system in the (treatment) gap between the surface of the printing forme cylinder and the laser writing head or passed therethrough.
  • laser beams which impinge targeted on the image-bearing properties having constituents / particles in the medium flow, they are deflected from the medium flow and on the Bereciungs Diagram, which is formed by the surface of the printing forme cylinder itself, this surrounding pressure sleeve or a pressure plate mounted on this applied, shot or deposited on these.
  • the deposited particles can be melted onto the surface.
  • the deposited particles can also be sintered onto the (imaging) surface.
  • the deposited particles can also be sintered onto the (imaging) surface.
  • the laser beam is substantially aligned preferably 90 ° to the medium flow to this.
  • the medium flow with the image-carrying properties is dust-shaped, that is, the image-bearing properties having components are dust particles.
  • the medium flow is, for example, blown along a guide system whose sections run between the surface of the printing forme cylinder and the laser writing head and thus forms a dust curtain from which the image-bearing particles are shot onto the imaging surface by means of laser beams.
  • this image-carrying particles having medium flow is a per se known toner.
  • the medium flow is formed by a liquid which is passed through the treatment gap along a guide system.
  • the liquid medium flow along a guide made of laser-permeable material, which may be quartz glass, run, for example.
  • imaging according to this embodiment can be carried out by means of a method consisting of inkjet technology in conjunction with laser technology.
  • a gaseous medium flow can be generated.
  • the gas stream passing through the treatment gap e.g. is blown, forms a kind of gas curtain, which is guided along an open or partially open control system.
  • solid bodies such as e.g. Carbon as carbon black
  • the reduction can also be used for releasing solids which, for example, are melted or sintered onto a printing form cylinder as image-carrying elements.
  • Adhesion promoters may preferably be used in addition to the mentioned forms of the medium.
  • the medium flow can be generated mechanically by means of pressure.
  • the medium flow can be generated electrostatically.
  • the medium flow can also be generated electromechanically (piezoelectric effect).
  • the object is achieved with a device having a printing form cylinder, with a one or more laser emitting laser writing head, which is arranged displaceably along the printing forme cylinder, with a device in which a medium flow can be generated, in which components are contained with image-bearing properties, and by means of which the medium flow can be conducted through a machining gap between laser writing head and printing forme cylinder.
  • a laser writing head is designed to emit one or more laser beams, which is located in the immediate vicinity of the surface to be described.
  • the laser writing head along the printing forme cylinder is slidably disposed.
  • One way of attaching and thus ensuring the necessary displaceability of the laser writing head is to attach it to a traverse, which runs along the printing forme cylinder.
  • the printing form cylinder rotates under the laser writing head, so that the writing process is spiral.
  • a treatment gap is formed, through which the medium flow flows with constituents / particles having image-carrying properties.
  • the medium flow generated mechanically, electrostatically or electromechanically within a device associated with the imaging device is guided in / by a medium circulation system such that the medium, irrespective of which state it is in, is deflected after passing through the treatment gap and again the treatment gap can be supplied.
  • the medium circulation system which may have a type of piping system, at least in the laser / imaging area sections which are on the one hand laser light-transmissive (eg of quartz glass) and on the other hand, the surface of the printing cylinder facing, open recesses, so that the liberated by means of laser beams (Mobilized) particles through these recesses out of the circulatory system and can be molded onto the surface.
  • this device has no imaging components that would have to be replaced, removed or the like within the printing unit, which means lower machine downtime compared to the prior art.
  • a rotary printing machine has at least one printing unit, which in turn is provided at least with a printing form cylinder 1.
  • the printing form cylinder 1 itself, a printing form sleeve (not shown) enclosing this or a printing plate (not shown) mounted on the printing form cylinder 1 are provided within the machine with a coating (illustration), e.g. as an intermediate carrier for subsequent transfer to e.g. the substrate is suitable.
  • a laser writing head 2 whose laser beams are aligned substantially perpendicularly relative to the longitudinal axis of the printing forme cylinder 1, is arranged in the immediate vicinity of the printing forme cylinder 1.
  • a device 3 is provided with a medium circulation system, by means of which a medium flow 4 is generated, wherein the medium is also guided through the machining gap between the laser writing head 2 and the printing form cylinder 1 in a wide range by means of a tube-like conduit system.
  • the medium circulation system of the device 3 has a forward branch 35 and a return branch 33.
  • the forward branch 35 has at least sections 31, which are made of laser light-permeable material.
  • the forward branch 35 additionally has sections 32, in particular in the area of imaging / laser irradiation (see in particular illustration A), which are provided with at least one recess 34, through which the particles accelerated by laser beams and carrying image-carrying properties from the medium Power 4 excreted / imposed and can be molded onto the surface of the plate cylinder 1.
  • the laser writing head 2 together with the device 3 can be arranged on eg a traverse (not shown) and moved in the longitudinal direction of the printing forme cylinder 1, so that the printing forme cylinder 1 can be described over its entire width.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Electronic Switches (AREA)

Claims (16)

  1. Procédé de fabrication d'une forme d'impression pour une rotative d'impression en réalisant un revêtement commandé en fonction de l'image sur la surface d'un cylindre porte-formes d'impression avec des éléments portant des images et qui sont appliqués à l'aide d'un ou plusieurs faisceaux laser d'une tête d'écriture à laser, mobile le long du cylindre d'impression, à la surface du cylindre porte-formes d'impression en rotation,
    selon lequel on génère un courant d'un milieu contenant des composants ayant des propriétés de support d'image,
    selon lequel le courant de milieu est conduit en continu ou de façon pulsée à travers un intervalle de travail entre la tête d'écriture à laser et la surface du cylindre porte-formes d'impression, et
    les faisceaux laser traversent le courant de milieu et séparent des composants ayant des propriétés de support d'image par rapport au milieu et les développe sur le cylindre porte-formes d'impression.
  2. Procédé selon la revendication 1, selon lequel le faisceau laser est pratiquement aligné à 90° par rapport au courant de milieu.
  3. Procédé selon l'une des revendications 1 ou 2, selon lequel le courant de milieu contient des particules de poussière.
  4. Procédé selon la revendication 3, selon lequel le courant de milieu contient un toner à l'état de poussière.
  5. Procédé selon l'une des revendications 1 ou 2, selon lequel le courant de milieu est liquide.
  6. Procédé selon l'une des revendications 1 ou 2, selon lequel le courant de milieu est gazeux.
  7. Procédé selon l'une des revendications 1 à 6, selon lequel les composants que l'on dépose à partir du courant de milieu sont fondus sur le cylindre porte-formes d'impression.
  8. Procédé selon l'une des revendications 1 à 6, selon lequel les composants déposés à partir du courant de milieu sont frittés sur le cylindre porte-formes d'impression.
  9. Procédé selon l'une des revendications 1 à 8, selon lequel on génère mécaniquement le courant de milieu.
  10. Procédé selon l'une des revendications 1 à 8, selon lequel on génère le courant de milieu par un moyen électrostatique.
  11. Procédé selon l'une des revendications 1 à 8, selon lequel on génère le courant de milieu par un moyen électromécanique.
  12. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comprenant :
    - un cylindre porte-formes d'impression (1),
    - une tête d'écriture laser (2) générant un ou plusieurs faisceaux laser, et que l'on déplace le long du cylindre porte-formes d'impression (1),
    - une installation (3) dans laquelle on génère un courant de milieu (4) contenant des composants ayant des caractéristiques de support d'image et
    - on fait passer le courant de milieu (4) dans un intervalle de travail entre la tête d'écriture à laser (2) et le cylindre porte-forme d'impression (1).
  13. Dispositif selon la revendication 12, selon lequel l'installation (3) est un système à circulation de milieu (33, 35) fermé et le milieu qui traverse l'intervalle de travail est renvoyé à cet intervalle de travail.
  14. Dispositif selon la revendication 12, selon lequel le milieu qui traverse l'intervalle de travail est un voile de gaz.
  15. Dispositif selon la revendication 12 ou 13, selon lequel le milieu qui traverse l'intervalle de travail est un voile de poussière.
  16. Dispositif selon la revendication 12 ou 13, selon lequel le milieu qui traverse l'intervalle de travail est un liquide.
EP20030015246 2002-08-03 2003-07-05 Procédé et dispositif pour produire une forme d'impression d'une rotatif à imprimer Expired - Lifetime EP1386732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235685 2002-08-03
DE2002135685 DE10235685A1 (de) 2002-08-03 2002-08-03 Verfahren und Vorrichtung zum Herstellen einer Druckform für eine Rotationsdruckmaschine

Publications (2)

Publication Number Publication Date
EP1386732A1 EP1386732A1 (fr) 2004-02-04
EP1386732B1 true EP1386732B1 (fr) 2008-09-03

Family

ID=30010594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030015246 Expired - Lifetime EP1386732B1 (fr) 2002-08-03 2003-07-05 Procédé et dispositif pour produire une forme d'impression d'une rotatif à imprimer

Country Status (2)

Country Link
EP (1) EP1386732B1 (fr)
DE (2) DE10235685A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59129172A (ja) * 1983-01-14 1984-07-25 Nec Corp レ−ザ−印刷装置
JPH0550603A (ja) * 1991-08-22 1993-03-02 Fujitsu Ltd 印字装置
DE4430555C1 (de) * 1994-08-27 1996-04-04 Roland Man Druckmasch Verfahren und Vorrichtung zur Herstellung einer Druckform
RU2082615C1 (ru) * 1995-06-20 1997-06-27 Сергей Николаевич Максимовский Печатная машина
JPH09118003A (ja) * 1995-10-25 1997-05-06 F I T:Kk 印刷版の製造方法
DE19811028B4 (de) * 1998-03-13 2006-11-23 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zur Erzeugung eines Thermotransferdrucks mittels einer bandförmigen Transferfolie
DE10045774C2 (de) * 2000-09-15 2002-08-14 Roland Man Druckmasch Thermotransferfolie mit reaktiver Polymermasse zur laserinduzierten Beschichtung, deren Herstellung und Verwendung

Also Published As

Publication number Publication date
EP1386732A1 (fr) 2004-02-04
DE50310427D1 (de) 2008-10-16
DE10235685A1 (de) 2004-02-19

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