EP0805023B1 - Cylindre porte-cliché pour une machine à imprimer - Google Patents

Cylindre porte-cliché pour une machine à imprimer Download PDF

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Publication number
EP0805023B1
EP0805023B1 EP97105897A EP97105897A EP0805023B1 EP 0805023 B1 EP0805023 B1 EP 0805023B1 EP 97105897 A EP97105897 A EP 97105897A EP 97105897 A EP97105897 A EP 97105897A EP 0805023 B1 EP0805023 B1 EP 0805023B1
Authority
EP
European Patent Office
Prior art keywords
forme cylinder
printing film
channel
printing
pressure roller
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
EP97105897A
Other languages
German (de)
English (en)
Other versions
EP0805023A1 (fr
Inventor
Jürgen Deschner
Ulrike Weisbrodt
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0805023A1 publication Critical patent/EP0805023A1/fr
Application granted granted Critical
Publication of EP0805023B1 publication Critical patent/EP0805023B1/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/06—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching of endless or like continuously-fed coverings

Definitions

  • the invention relates to a forme cylinder for a printing press, being a printing element a printing film is used, which on the outer surface of the forme cylinder is raised.
  • Known forme cylinders contain a channel that is at least over the printing image width is sufficient.
  • the Accessible through the channel are a take-up and a take-off roll for printing film arranged.
  • the printing film is based on the circumference of the unwind roll over a Channel edge and guided over the outer surface of the forme cylinder. Over another channel edge the printing film is returned to the unwind roll inside the forme cylinder.
  • the printing film can be pre-imaged or imaged in the opened state become.
  • DE 42 24 332 A1 shows a forme cylinder in which, for simplification, the An initial part is provided with printing film, which consists of a channel of the Forme cylinder is removable.
  • printing film which consists of a channel of the Forme cylinder is removable.
  • Transport rollers are provided which are coupled to a drive.
  • the insert is peripherally open, so that the film is exposed to the environment.
  • the Transport rollers exert frictional forces on the printing film, which adversely affect the Can guide slide.
  • US Pat. No. 5,355,795 shows an insert part for printing film designed as a cassette.
  • the cassette is peripherally provided with a hinged lid.
  • the Cassette are still between the cover and the channel edges of a forme cylinder Openings through which unwanted particles from the environment on the Printing film can get.
  • the object of the invention is to develop a forme cylinder with a channel cover, which prevents contamination inside the forme cylinder, and which prevents passage the printing film through the gap between the cover and the channel edge enabled free of damage.
  • the task is solved with a forme cylinder, which according to the characteristics Claim 1 is formed.
  • the invention has the advantage that during the renewal of the printing film on the outer surface of the forme cylinder, the pressure roller or the pressure rollers when conveying the Roll off the printing film on the surface of the forme cylinder.
  • the rolling friction is so low that the imaged surface or the surface to be imaged is not damaged.
  • the pressure rollers are constantly on the printing film, so that the tightness of the cover is guaranteed. Furthermore, the pressure rollers create a smoothing effect reached on the printing film, so that the film exactly on the outer surface of the forme cylinder rests or is neatly wound onto the take-up reel.
  • the variant with only one pressure roller, which is assigned to the channel edge over which the Printing film is processed, is applicable to solutions where the printing film after Printing should no longer be used.
  • the variant with two pressure rollers, the are assigned to each channel edge, can be used in solutions, at which the illustrated printing film is to be used again. There would be a change a reversal of the winding direction of the printing film of a printed image without further notice possible.
  • the forme cylinder shown in FIG. 1 has a cavity 1 which extends via a channel 2 the width A is accessible.
  • a take-up roll 3 and one Unwinding roll 4 for printing film 5 mounted on shafts 6, 7.
  • the shaft 6 is with a drive and the shaft 7 coupled to a braking mechanism.
  • Channel 2 is with a Provide cover that extends across the width A.
  • the cover consists of a Frame 8, which is fastened by means of bolts 9, 10 in end parts of the forme cylinder.
  • a cover plate 13 is fastened to the frame 8 with screws 11, 12.
  • the Printing film 5 is guided over the channel edges 14, 15 to the outside and onto the Covered surface 16 of the forme cylinder.
  • an elastic sealing lip 17 is provided on the frame 8, which on the Surface of the printing film 5 rests.
  • a pressure roller 18 is provided, which is parallel is arranged to the channel edge 15 and is movable perpendicular to the channel edge 15. To are the bearings 19 of the pressure roller 18 in the frame 8 slidably. Against the Bearing 19 pressing pieces 20 bring the pressure roller 18 into contact with the Printing film 5, which abuts the channel edge 15.
  • the printing film 5 is not when exiting the channel 2 through the Pressure roller 18 damaged.
  • the pressure roller 18 smoothes the printing film 5, before it is drawn onto the outer surface 16, whereby the printing film 5 for one Imaging process and a subsequent printing process just on the Shell surface 16 rests.
  • a further pressure roller 21 can be used instead of Sealing lip 17 may be arranged, which is shown in more detail in Fig. 3.
  • the bearings 22 of the Pressure roller 21 are, just as with pressure roller 18, with the help of Pressure pieces 23 so acted with force that the pressure roller 21 on the in the Channel 2 incoming printing film 5 is present. This ensures that the illustration the printing film 5 not when entering the channel 2 by any sealing elements is damaged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (3)

  1. Cylindre porte-cliché pour une machine à imprimer,
    comprenant une feuille d'impression tendue sur la surface de l'enveloppe du cylindre porte-cliché,
    dont chacune des extrémités est fixée d'une part à un rouleau d'enroulement et d'autre part à un rouleau de déroulement de la feuille d'impression qui sont situés à l'intérieur du cylindre porte-cliché,
    le cylindre porte-cliché comportant un canal orienté dans la direction d'une génératrice et sur les arêtes de canal duquel la feuille d'impression est guidée à l'intérieur du cylindre porte-cliché et
    le canal étant par ailleurs fermé par un élément de couverture,
    caractérisé
    en ce qu'au moins un rouleau presseur (18, 21) qui est prévu sur l'élément de couverture (8, 13) est en appui contre la feuille d'impression (5) guidée hors de l'intérieur (1) du cylindre porte-cliché et passant sur une arête (14, 15) du canal et roule sans glissement sur la feuille d'impression (5) lors de l'avance de cette dernière.
  2. Cylindre porte-cliché selon la revendication 1,
    caractérisé
    en ce que le rouleau presseur (18, 21) est en appui sous l'effet de la force d'un ressort contre la feuille d'impression (5).
  3. Cylindre porte-cliché selon la revendication 1,
    caractérisé
    en ce qu'un autre rouleau presseur (21) qui est prévu sur l'élément de couverture (8, 13) est en appui contre la feuille d'impression (5) guidée à l'intérieur (1) du cylindre porte-cliché et passant sur la deuxième arête (14) du canal.
EP97105897A 1996-04-30 1997-04-10 Cylindre porte-cliché pour une machine à imprimer Expired - Lifetime EP0805023B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19617217A DE19617217A1 (de) 1996-04-30 1996-04-30 Formzylinder für eine Druckmaschine
DE19617217 1996-04-30

Publications (2)

Publication Number Publication Date
EP0805023A1 EP0805023A1 (fr) 1997-11-05
EP0805023B1 true EP0805023B1 (fr) 1999-12-01

Family

ID=7792855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105897A Expired - Lifetime EP0805023B1 (fr) 1996-04-30 1997-04-10 Cylindre porte-cliché pour une machine à imprimer

Country Status (4)

Country Link
US (1) US5809881A (fr)
EP (1) EP0805023B1 (fr)
JP (1) JP3805857B2 (fr)
DE (2) DE19617217A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10337839A (ja) * 1997-06-09 1998-12-22 Riso Kagaku Corp 孔版印刷方法、孔版印刷原版、孔版印刷原版の製造方法、及び孔版印刷装置
DE10000904A1 (de) 1999-02-10 2000-08-17 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Bereitstellung und Zuführung von Druckformen
US6609460B2 (en) * 2000-11-15 2003-08-26 Heidelberger Druckmaschinen Ag Cylinder for receiving a printing form including cylinder gap with curved gap edges
US20070095232A1 (en) * 2005-02-14 2007-05-03 Teng Gary G Lithographic printing press and method for on-press imaging lithographic printing plate
US7404357B2 (en) * 2005-08-31 2008-07-29 Heidelberger Druckmaschinen Ag Device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press
US7874249B2 (en) * 2007-03-26 2011-01-25 Gary Ganghui Teng Deactivating device and method for lithographic printing plate

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US618058A (en) * 1899-01-24 crowell
USRE19082E (en) * 1934-02-13 Duplicator
US912724A (en) * 1905-03-21 1909-02-16 American Lithographic Co Printing-press.
DE2804556C2 (de) * 1978-02-03 1983-11-24 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Abnehmbare Kanalabdeckung von Zylinderkanälen bei Druckmaschinen
DE4303872C2 (de) * 1992-04-24 1995-08-10 Roland Man Druckmasch Druckmaschine mit einem Formzylinder und Verfahren zur Druckvorbereitung des Formzylinders
DE4224332A1 (de) * 1992-07-23 1994-01-27 Heidelberger Druckmasch Ag Plattenzylinder für Rotationsdruckmaschinen
US5355795A (en) * 1993-08-26 1994-10-18 Presstek, Inc. Automatic plate-loading cylinder for use with plate-imaging systems

Also Published As

Publication number Publication date
US5809881A (en) 1998-09-22
JP3805857B2 (ja) 2006-08-09
DE59700781D1 (de) 2000-01-05
JPH1044365A (ja) 1998-02-17
EP0805023A1 (fr) 1997-11-05
DE19617217A1 (de) 1997-11-06

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