EP0368178A2 - Procédé de formation directe de l'image sur un cylindre d'impression - Google Patents

Procédé de formation directe de l'image sur un cylindre d'impression Download PDF

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Publication number
EP0368178A2
EP0368178A2 EP89120428A EP89120428A EP0368178A2 EP 0368178 A2 EP0368178 A2 EP 0368178A2 EP 89120428 A EP89120428 A EP 89120428A EP 89120428 A EP89120428 A EP 89120428A EP 0368178 A2 EP0368178 A2 EP 0368178A2
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
printing form
form cylinder
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
EP89120428A
Other languages
German (de)
English (en)
Other versions
EP0368178B1 (fr
EP0368178A3 (en
Inventor
Josef Dr. Schneider
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 EP0368178A2 publication Critical patent/EP0368178A2/fr
Publication of EP0368178A3 publication Critical patent/EP0368178A3/de
Application granted granted Critical
Publication of EP0368178B1 publication Critical patent/EP0368178B1/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
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • 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
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to a method for direct imaging of a printing form cylinder by means of an image-appropriate application of substance influencing the color guidance on parts of the printing form cylinder surface by means of a pixel transmission unit in accordance with digital image information.
  • An offset printing machine on which such a method is practiced is known from DE-PS 32 48 178.
  • substance parts are released from an electronically controlled pixel transmission unit in accordance with digital image information from a continuously coated thermal transfer film and placed directly on the printing form cylinder.
  • the disadvantage of this method is the relatively low transfer speed when transferring the substance point by point and the relatively large space requirement for the pixel transfer unit, which prevents use in compactly constructed printing machines.
  • a pixel transfer unit is required on each forme cylinder, which is very complex and therefore expensive.
  • the object of the invention is to develop a method in which the direct imaging of a printing form cylinder can be carried out more quickly, more cost-effectively and with less space requirement.
  • a transfer belt is connected between the pixel transfer unit and the printing form cylinder has the following advantages:
  • the transfer speed when transferring the substance to the printing form cylinder line by line or in multiple lines is substantially higher than when transferring the substance parts point by point to the transfer belt by the pixel transfer unit.
  • Transfer ribbons can be created outside of the press regardless of the printing process, making it easy with one Pixel transfer unit
  • the scope of the print images temporarily stored on the transfer belt can advantageously include all print images required for production in different printing units.
  • the space required for a transfer belt is no greater than that of a printing material web.
  • the means necessary for guiding, transporting and registering which are already available for the printing material web, can also be used for the transfer belt as far as possible.
  • Fig. 1, 1 schematically denotes a printing form cylinder and 2 a printing cylinder of a rotary printing press.
  • the printing form cylinder 1 can be designed as an intaglio printing form cylinder, as a screen printing form cylinder or as a DiLitho form cylinder, which during the actual printing process, not shown, generates a print image on a printing material web guided past it and supported by the printing cylinder 2 according to the ink-carrying parts of its surface.
  • the path of the substrate is indicated with 3 dashed lines.
  • heating devices 4, 5 are provided above and below the path 3 of the printing material web.
  • On the outlet side 1 further heating devices 6 are arranged close to the printing form cylinder.
  • a transfer belt 7 is provided, which by means of a method, not shown - since known in principle from DE-PS 32 48 178 - such as thermal transfer by means of a thermal print head or pen electrodes, by a toner printing process or by melt spraying a device similar to an inkjet printer was provided with an image-appropriate application of substance particles 8 influencing the color guidance.
  • the substance particles 8 can, for example, be made of wax, a thermoplastic or another material which, after being applied by a pixel transmission unit (not shown) (see also the patent applications P .. .. ..., P .. ... .. and P .. .. ...; file number of the applicant PB 3471, PB 3472 and PB 3473) on the transfer belt 7 cools down immediately and solidifies.
  • the transfer belt 7 is introduced into the printing press along the path 3 provided for a printing material web, it being possible to use all of the devices available for its transport and all of the register setting devices.
  • the substance parts 8 are melted again and when the gap then passes through the printing cylinder 2, which presses on the underside of the transfer belt 7, is pressed against the printing form cylinder 1, where it immediately cures again in contact with its cold surface.
  • the substance particles 8 influence the color guidance on the surface of the printing form cylinder 1 in different ways, depending on the type thereof. If the printing form cylinder 1 is an intaglio printing cylinder with a uniform cell basic grid, the cells are partially filled with the substance particles 8. When inking, there is then only a correspondingly reduced ink volume available for the printing ink (see also parallel patent application P .. .. ...; file number of the applicant PB 3472).
  • the substance parts 8 close the holes on the image parts free of color during printing (see parallel patent application P .. .. ...; file number of the applicant PB 3473).
  • the printing form cylinder 1 is a DiLitho form cylinder of an offset printing press, the surface of which is initially continuously provided with a hydrophilic coating, then the substance parts mark the ink-bearing print image parts with their oleophilic property.
  • the transfer belt 7 is removed from the printing press and replaced by the printing material web.
  • the substance can be removed by an erasing device 9 arranged on the printing form cylinder 1 and the printing form cylinder 1 can thereby be prepared for a new imaging.
  • the extinguishing process takes place by reheating and liquefying the substance, which is supported by doctoring and / or wiping or blowing with hot air.
  • a printing unit of an offset rotary printing press is shown schematically, which comprises a printing form cylinder 11, a printing cylinder 12 and a blanket cylinder 10 arranged between them.
  • the of further inking and dampening units employed on the printing form cylinder 11 are omitted since they are of no importance for the present invention.
  • a printing material web is passed horizontally between blanket cylinder 10 and printing cylinder 12 on a path 13 indicated by dashed lines.
  • a transfer belt 14 is at least partially introduced into the printing press in the way that is customary for the printing material web.
  • the transfer belt 14 was provided with an image-appropriate substance application on its underside by a pixel transmission unit.
  • the transfer belt 14 After passing the gap between the blanket cylinder 10 and the impression cylinder 12, the transfer belt 14 is guided around the blanket cylinder 10 in a departure from the path 13 of the printing material web.
  • the blanket cylinder 10 is equipped with grippers which are arranged laterally and are known from sheet-fed offset machines.
  • a heating device 15 is directed onto the blanket cylinder 10 and melts the substance parts 16.
  • a printing form cylinder illustrated in this way is deleted after the printing process has ended, analogously to the first exemplary embodiment, by means of a deleting device (not shown) which can be set on the printing form cylinder 11.
  • a printing unit of an offset rotary printing press that is identical in the cylinder configuration to the second exemplary embodiment is schematically shown, which comprises a blanket cylinder 20, a printing form cylinder 21 and a printing cylinder 22.
  • the 23 is dashed denotes indicated path that a printing material web takes during the printing process, not shown.
  • a switch 24 is arranged in front of the printing unit.
  • a branching branch 25 leads from the switch 24 to the gap between the printing form cylinder 21 and the blanket cylinder 20.
  • the position of the switch 24 depends on the task to be performed: during printing, a printing material web is passed on the path 23 between the blanket cylinder 20 and the printing cylinder 22. To image the printing form cylinder 21, a transfer belt 26 provided on its upper side with an image-appropriate substance application is guided over the branching strand 25; the substance parts 28 are melted by a heating device 27 and pressed by the blanket cylinder 20, which presses against the transfer belt from the rear, against the printing form cylinder 21, where they immediately solidify in contact with the cold surface thereof.
  • the transfer belt 26 can be returned to the path 23 of a printing material web via a further switch 29, so that the branching strand 25 forms a complete bypass in the region of the printing unit to the path 23 of the printing material web.
  • a printing unit of an offset rotary printing press is schematically shown, which comprises a blanket cylinder 30, a printing form cylinder 31 and a printing cylinder 32.
  • 33 denotes the path indicated by dashed lines that a printing material web takes through the machine during the printing process, not shown.
  • a transfer belt 34 previously provided by means of a pixel transmission unit with an image-appropriate substance application (see parallel patent application P .. ...; file number of the applicant PB 3471), is introduced into the printing machine for imaging the printing form cylinder 31.
  • the substance parts 36 are melted and then pressed against the latter when the gap between the printing cylinder 32 and the blanket cylinder 30 is passed. In contact with the cold surface of the blanket cylinder 30 the substance parts 36 initially solidify on this. In a second transfer step, the substance parts 36 are liquefied again by a further heating device 37 directed towards the blanket cylinder 30 and transferred from the blanket cylinder to the printing form cylinder 31. There, the solidified substance parts 36, with their oleophilic properties, form the color-guiding image parts on the printing form cylinder 31, which is otherwise provided with a continuous hydrophilic coating.
  • a printing forme cylinder illustrated in this way can be erased analogously to the first exemplary embodiment by means of an erasing device (not shown here).
  • the invention is based on the core idea of choosing the reverse path as far as possible for the creation of a print image on a printing form cylinder, which the colored print image takes during the actual printing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Printing Methods (AREA)
  • Rotary Presses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Electronic Switches (AREA)
EP89120428A 1988-11-09 1989-11-04 Procédé de formation directe de l'image sur un cylindre d'impression Expired - Lifetime EP0368178B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3837979 1988-11-09
DE3837979A DE3837979C2 (de) 1988-11-09 1988-11-09 Vorrichtung zur direkten Bebilderung eines Druckformzylinders

Publications (3)

Publication Number Publication Date
EP0368178A2 true EP0368178A2 (fr) 1990-05-16
EP0368178A3 EP0368178A3 (en) 1990-11-28
EP0368178B1 EP0368178B1 (fr) 1993-07-14

Family

ID=6366799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120428A Expired - Lifetime EP0368178B1 (fr) 1988-11-09 1989-11-04 Procédé de formation directe de l'image sur un cylindre d'impression

Country Status (3)

Country Link
EP (1) EP0368178B1 (fr)
JP (1) JP2801300B2 (fr)
DE (3) DE3837979C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508842B4 (de) * 1995-03-11 2005-11-24 Koenig & Bauer Ag Verfahren zur Bebilderung einer Druckplatte
JPH11139016A (ja) * 1997-11-14 1999-05-25 Hitachi Koki Co Ltd ソリッドインク印刷原版及びその作製方法
JPH11139017A (ja) * 1997-11-14 1999-05-25 Hitachi Koki Co Ltd ソリッドインク印刷原版及びその作製方法
BR112013022420B1 (pt) * 2011-03-11 2020-12-01 Hewlett-Packard Development Company, L.P. conjunto de assentamento de folha de mídia, impressora e método de alinhamento de impressão

Citations (4)

* 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
DE3248178C2 (fr) * 1982-12-27 1987-02-19 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt, De
EP0264604A2 (fr) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Plaque d'impression lithographique
DE3809915A1 (de) * 1988-03-24 1989-10-05 Man Technologie Gmbh Verfahren zum uebertragen von druckbildern im flachdruck

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299807A (en) * 1963-10-22 1967-01-24 Minnesota Mining & Mfg Direct imaging of offset plates
US3752076A (en) * 1971-03-12 1973-08-14 Olivetti & Co Spa Method for duplicating a preliminary copy
DE100778T1 (de) * 1982-08-10 1984-05-24 Mitsubishi Jukogyo K.K., Tokio/Tokyo Vorrichtung zum automatischen auswechseln von druckplatten.
DE3507418A1 (de) * 1985-03-02 1986-09-04 Basf Ag, 6700 Ludwigshafen Verfahren zur uebertragung von informationen auf eine offset-druckplatte
DE4241601C2 (de) * 1992-12-10 2002-06-13 Koenig & Bauer Ag Verfahren und Vorrichtung zum automatischen Ein- oder Auszug von flexiblen Druckplatten

Patent Citations (4)

* 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
DE3248178C2 (fr) * 1982-12-27 1987-02-19 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt, De
EP0264604A2 (fr) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Plaque d'impression lithographique
DE3809915A1 (de) * 1988-03-24 1989-10-05 Man Technologie Gmbh Verfahren zum uebertragen von druckbildern im flachdruck

Also Published As

Publication number Publication date
EP0368178B1 (fr) 1993-07-14
DE3837979C2 (de) 1995-12-07
JPH02178044A (ja) 1990-07-11
EP0368178A3 (en) 1990-11-28
DE58904911D1 (de) 1993-08-19
DE3844946C2 (de) 1997-05-15
JP2801300B2 (ja) 1998-09-21
DE3837979A1 (de) 1990-05-10

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