EP0363842A2 - Procédé pour la fabrication de plaques d'impression - Google Patents

Procédé pour la fabrication de plaques d'impression Download PDF

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Publication number
EP0363842A2
EP0363842A2 EP89118604A EP89118604A EP0363842A2 EP 0363842 A2 EP0363842 A2 EP 0363842A2 EP 89118604 A EP89118604 A EP 89118604A EP 89118604 A EP89118604 A EP 89118604A EP 0363842 A2 EP0363842 A2 EP 0363842A2
Authority
EP
European Patent Office
Prior art keywords
transfer
surface elements
belt
printing form
transfer belt
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
EP89118604A
Other languages
German (de)
English (en)
Other versions
EP0363842B1 (fr
EP0363842A3 (en
Inventor
Hartmut Fuhrmann
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
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 EP0363842A2 publication Critical patent/EP0363842A2/fr
Publication of EP0363842A3 publication Critical patent/EP0363842A3/de
Application granted granted Critical
Publication of EP0363842B1 publication Critical patent/EP0363842B1/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
    • B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor
    • 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

Definitions

  • the invention relates to a method and an apparatus for the production of printing forms for planographic printing, in which ink-accepting surface elements are transferred from a thermal transfer ribbon to the printing form under the action of heat and pressure.
  • a method of this type in which ink-accepting surface elements are transferred from a thermal transfer ribbon, hereinafter called transfer ribbon, to a water-accepting surface of a printing form by means of a control element. Selective heat is generated by the control element, so that individual ink-accepting points of the transfer ribbon are applied to the surface of the printing form.
  • a printing form is provided according to the known method, which contains a heat-insulating material at least on the surface. This prevents the heat generated by the thermal print head from flowing away quickly and ensures that the layer is transferred in a precisely defined manner.
  • the invention has for its object to develop a method of the type mentioned in such a way that a good transfer of the ink-accepting surface elements can be carried out on the printing form.
  • auxiliary belt enables the rigid control element (e.g. thermal print head) to be contrasted with a deformable counter-pressure element, so that a complete transfer of ink-accepting surface elements is possible. This prevents two inelastic parts from being pressed against each other. Lower abrasion also extends the life of the components.
  • the measure according to the invention also makes the transfer to large printing form roller diameters (200 to 400 mm) unproblematic, even if line thermal print heads are used as control elements.
  • the ink-accepting surface elements are transferred from the transfer belt to a transfer belt in the first process stage and only from this to the printing form in the second process stage.
  • the additional roller interacting with the printing form can be equipped with a heat.
  • the intermediate rollers can be made of rubber, so that a rigid component presses against an elastic component and thus less abrasion and, above all, the complete transfer of surface elements over the entire printing width is possible.
  • the transfer belt can be an endless belt running over rollers. Depending on the material and design of the transfer belt, in some cases this is expediently unwound from a supply spool.
  • the other areas are transferred to an auxiliary belt designed as a receiving belt, so that the surface elements representing the image information remain on the transfer belt and are transferred directly from the transfer belt to the printing form in the second process stage .
  • the take-up tape is unwound from a supply reel.
  • a relatively simple component is used for the actual transfer of the ink-accepting surface elements to the printing form surface with a heated roller, which can also cope with increased energy requirements more easily than a control element (e.g. line thermal print head).
  • a control element e.g. line thermal print head
  • the heat required to transfer the ink-accepting surface elements to the die surface can also be applied in other ways; e.g. B. by heating the ink-accepting surface elements by means of radiation energy or by ohmic heating of the entire band. In the latter case, ohmic heating can also take place via a metal layer which is vapor-deposited on the transfer belt and carries the ink-accepting surface elements.
  • the invention extends to a device which is characterized by the features of claim 4.
  • Figures 1 to 4 each show a schematic representation of an embodiment of the invention.
  • a cylindrical printing form 10 which cooperates with a rubber cylinder 11 of a printing machine, not shown.
  • the printing form 10 has an ink-repellent surface, to which a device 12 to 15 is assigned, with which ink-accepting surface elements represent the image information to be printed, to which the printing form surface can be applied.
  • the individual FIGS. 1 to 4 each show an embodiment of this device 12 to 15.
  • the device 12 is equipped with a thermal transfer ribbon 22 wound on spools 20, 21, a control element, for example a thermal print head 23, and an auxiliary ribbon 24 designed as a transfer ribbon.
  • the thermal print head 23 is controlled by means of a control unit (not shown) in accordance with an image to be transferred, in such a way that it introduces heat and pressure onto the transfer belt 22 at each pixel and thus enables the ink-accepting coating of the transfer belt 22 to be transferred to the transfer belt 24 at a specific point.
  • an elastic counter-pressure roller 25 is provided opposite the print head, which can consist, for example, of rubber, silicone or another elastomer.
  • the transfer belt 22 is rewound and, on the other hand, the transfer belt 24 is brought into circulation around the counter roller 25 of a heated roller 26 and an auxiliary roller 27.
  • the ink-accepting surface elements applied to the transfer belt 24 are guided between the heatable roller 26 and the printing form 10, the surface elements being transferred from the transfer belt 24 to the printing form surface 28 by the effect of the temperature and the pressure exerted by the pressure roller 26.
  • the material it is possible for the material to be stronger on the printing form surface 28 by means of a downstream heat source 29 fix or preheat the printing plate surface by an upstream heat source, not shown.
  • the transfer belt 24 should have a material composition and a surface texture that enables a sharp-edged covering with ink-accepting surface elements. Another requirement is the dimensional stability, which ensures that the surface elements are transferred to the printing form in a dimensionally correct manner.
  • Suitable materials for the transfer belt 24 are e.g. B. polyester, polyester coated with silicone, polyvinyldenfluoride, polyimide (e.g. Kapton), polytretrafluoroethylene, glass fiber reinforced PTFE film and acetate film or one of the aforementioned materials with one-sided or double-sided metallic vapor deposition or metal foils with or without coating with one of the above Plastics.
  • the transmission belt 24 is designed as a reusable endless belt, which is guided in the circulation system.
  • a developable from a supply belt 30 transfer belt 24 ' is provided, which is wound onto a second spool 31 after the transfer operation. Otherwise, the device and the method to be carried out according to FIG. 2 correspond to that of FIG. 1.
  • FIG. 3 Another embodiment of a transmission device 14 is shown in FIG. 3.
  • the thermal transfer ribbon 22 is heated by the supply reel Roller 26 guided before the tape is wound onto the take-up roll 21.
  • the control element 23 acts together with the counter roller 25 on the transfer belt 22 and in this case an auxiliary belt designed as a receiving belt 35.
  • the print head 23 is driven in such a way that it drives the dots containing no image information and thus transfers the surface elements that do not represent image information to the recording tape 35. The surface elements which correspond to the image to be printed thus remain on the transfer belt 22.
  • the take-up tape 35 is unwound from a supply reel 36.
  • the arrangement according to FIG. 4 differs from that according to FIG. 3 in that a common spool 38 is provided for the transfer belt 22 and the receiving belt 35.
  • an IR or other radiation heater 39 is arranged here in such a way that the heat rays hit the transfer belt 22 in the vicinity of the transfer region 40 and thereby heat the transfer belt 22.
  • a non-heated roller 26 is provided.
  • Such a heat source 39 can of course also be used in the device 12 or 13 according to FIGS. 1 and 2, namely for heating the auxiliary or transfer belt 24, 24 '.
  • a band is selected that contains or consists of at least one resistance element.
  • a metal layer that has been vapor-deposited onto a band consisting, for example, of plastic can assume the role.
  • the resistance element is connected to a voltage source, for example, via sliding contacts.
  • the devices described cannot only be used for printing presses and in connection with cylindrical printing forms. Rather, they are suitable for all duplicating devices and are independent of the design of the printing form (flat, cylindrical).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electronic Switches (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP89118604A 1988-10-08 1989-10-06 Procédé pour la fabrication de plaques d'impression Expired - Lifetime EP0363842B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3834270 1988-10-08
DE3834270A DE3834270A1 (de) 1988-10-08 1988-10-08 Verfahren zur herstellung von druckformen

Publications (3)

Publication Number Publication Date
EP0363842A2 true EP0363842A2 (fr) 1990-04-18
EP0363842A3 EP0363842A3 (en) 1990-11-22
EP0363842B1 EP0363842B1 (fr) 1993-12-08

Family

ID=6364661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118604A Expired - Lifetime EP0363842B1 (fr) 1988-10-08 1989-10-06 Procédé pour la fabrication de plaques d'impression

Country Status (4)

Country Link
US (1) US4958564A (fr)
EP (1) EP0363842B1 (fr)
JP (1) JP3031927B2 (fr)
DE (2) DE3834270A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368180A2 (fr) * 1988-11-09 1990-05-16 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Procédé de fabrication d'un cylindre d'impression portant une image

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072671A (en) * 1988-11-09 1991-12-17 Man Roland Druckmaschinen Ag System and method to apply a printing image on a printing machine cylinder in accordance with electronically furnished image information
DE3941303C1 (fr) * 1989-12-14 1990-12-13 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US5156089A (en) * 1990-12-17 1992-10-20 Gerber Scientific Products, Inc. Method and apparatus for making a painting screen using an ink jet printer for printing a graphic on the screen emulsion
JPH04224964A (ja) * 1990-12-27 1992-08-14 Brother Ind Ltd 電子スタンプ装置
US5129321A (en) * 1991-07-08 1992-07-14 Rockwell International Corporation Direct-to-press imaging system for use in lithographic printing
US5440987A (en) * 1994-01-21 1995-08-15 Presstek, Inc. Laser imaged seamless lithographic printing members and method of making
US5738013A (en) * 1996-05-14 1998-04-14 New England Science & Specialty Products, Inc. Method of making a lithographic printing plate with an ink jet fluid material
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
DE10054284B4 (de) * 2000-11-02 2010-04-08 Manroland Ag Verfahren zur Behandlung einer löschbaren lithographischen Druckform
DE10119368B4 (de) 2001-04-20 2004-09-09 Man Roland Druckmaschinen Ag Verfahren zum Variieren der Farbdichte des Volltons beim Druck innerhalb einer Rotationsdruckmaschine
DE10153794A1 (de) * 2001-10-31 2003-05-22 Roland Man Druckmasch Verfahren und Vorrichtung zur integrierten Druckformerzeugung in einer Verarbeitungsmaschine
US6894713B2 (en) 2002-02-08 2005-05-17 Kodak Polychrome Graphics Llc Method and apparatus for laser-induced thermal transfer printing
US7439995B2 (en) * 2002-02-08 2008-10-21 Kodak Polychrome Graphics, Gmbh Method and apparatus for laser induced thermal transfer printing
EP1477308B1 (fr) 2003-05-14 2006-07-19 Agfa-Gevaert Procédé d' impression à jet d'encre "ordinateur-vers-plaque"

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR457270A (fr) * 1913-04-30 1913-09-15 J Voirin Des Ets Procédé et dispositif pour l'obtention directe des planches d'impression utilisées dans les machines à report sur caoutchouc ou autres matières plastiques
EP0264604A2 (fr) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Plaque d'impression lithographique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551288A (de) * 1972-04-12 1974-07-15 Ritzerfeld Gerhard Verfahren zur herstellung eines hektographischen umdruckoriginals auf thermischem wege.
US3964389A (en) * 1974-01-17 1976-06-22 Scott Paper Company Printing plate by laser transfer
JPS5839457A (ja) * 1981-09-04 1983-03-08 Fuji Xerox Co Ltd 謄写用原版作成方法
DE3248178C2 (de) * 1982-12-27 1987-02-19 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt Bildmäßige Beschichtung von Druckformen für den Flachdruck
DE3507418A1 (de) * 1985-03-02 1986-09-04 Basf Ag, 6700 Ludwigshafen Verfahren zur uebertragung von informationen auf eine offset-druckplatte
JPS62264953A (ja) * 1986-05-13 1987-11-17 Fuji Xerox Co Ltd 感熱穿孔印刷法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR457270A (fr) * 1913-04-30 1913-09-15 J Voirin Des Ets Procédé et dispositif pour l'obtention directe des planches d'impression utilisées dans les machines à report sur caoutchouc ou autres matières plastiques
EP0264604A2 (fr) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Plaque d'impression lithographique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368180A2 (fr) * 1988-11-09 1990-05-16 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Procédé de fabrication d'un cylindre d'impression portant une image
EP0368180B1 (fr) * 1988-11-09 1993-10-20 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Procédé de fabrication d'un cylindre d'impression portant une image

Also Published As

Publication number Publication date
JP3031927B2 (ja) 2000-04-10
DE58906369D1 (de) 1994-01-20
JPH02217247A (ja) 1990-08-30
DE3834270A1 (de) 1990-04-12
EP0363842B1 (fr) 1993-12-08
DE3834270C2 (fr) 1992-02-13
US4958564A (en) 1990-09-25
EP0363842A3 (en) 1990-11-22

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