EP0995597A1 - Cylindre de plaque dans une machine d'impression avec dispositif de tension de plaque - Google Patents

Cylindre de plaque dans une machine d'impression avec dispositif de tension de plaque Download PDF

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Publication number
EP0995597A1
EP0995597A1 EP99120106A EP99120106A EP0995597A1 EP 0995597 A1 EP0995597 A1 EP 0995597A1 EP 99120106 A EP99120106 A EP 99120106A EP 99120106 A EP99120106 A EP 99120106A EP 0995597 A1 EP0995597 A1 EP 0995597A1
Authority
EP
European Patent Office
Prior art keywords
plate
eccentric shaft
finger
printing machine
machine according
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
EP99120106A
Other languages
German (de)
English (en)
Other versions
EP0995597B1 (fr
Inventor
David Crowell Emery
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 EP0995597A1 publication Critical patent/EP0995597A1/fr
Application granted granted Critical
Publication of EP0995597B1 publication Critical patent/EP0995597B1/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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means

Definitions

  • the present invention relates generally to printing machines, particularly one Plate cylinder with a plate clamping device according to the preamble of claim 1.
  • Printing machines in particular offset printing machines, generally comprise Plate cylinder, on which printing plates are applied, which the image to be printed contain.
  • the ends of the pressure plate are axially on the plate cylinder extending gap inserted and held therein by a clamping device. To the plate Keeping them firmly in place is often a complex process to manufacture and therefore costly clamping device necessary. Through the ends of the Pressure plate creates a slit on the outer surface of the plate. To avoid Vibrations and waste are desirable to keep this gap as narrow as possible hold.
  • a tensioning device includes a resilient acting pressure element, which exerts a force to the plate during the To keep the printing operation in position.
  • this jig is very complicated and includes many different, u. U. complex to manufacture and maintain components.
  • the present invention relates to a printing press with a plate cylinder the peripheral surface of which is an axial gap with a first side and a second side runs and the one along the first side of the gap at least partially open axial Has bore or a channel with a bore axis.
  • the leading edge and the The rear edge of a printing plate is inserted into the gap.
  • Eccentric shaft arranged which is eccentric with respect to the bore axis is rotatable that it can selectively apply a force to the front edge and the rear edge of the Can exert pressure plate.
  • finger-like Protrusions formed by openings formed in the front and rear edges reach through and the front and / or rear edge of the pressure plate during a rotation pulling the shaft into the cylinder chamber on the one hand and moving the Plate ends from the cylinder gap, d. H. a detachment of the printing plate from the plate cylinder prevent effectively.
  • the finger-like projections are preferably only on the arranged both ends of the eccentric shaft; but also the possibility consists of a plurality of finger-like projections at regular intervals along to arrange the eccentric shaft, thereby increasing the reliability of the invention Plate clamping device is additionally increased.
  • the finger-like projections to minimize the Plate response have a suitable cross-sectional shape to avoid the danger the tearing of the front and / or rear edge of the pressure plate during the clamping process and to be further reduced in continuous printing operations at high press speeds.
  • the eccentric shaft according to the present invention can also be used as desired Friction ratio between the front or back edge of the pressure plate and the shaft preferably have surfaces of different properties.
  • the invention preferably also comprises a device arranged on the shaft for turning the same, which in the simplest case is a wrench or a Can be a wrench etc. In the same way there is the possibility of going through the shaft to turn an engine.
  • the eccentric shaft can be used to lock the shaft in a certain position, e.g. B. in a variety of intended rotational positions preferably also various holding devices, e.g. B. clamps, other eccentrics or Latches etc. may be provided.
  • a certain position e.g. B. in a variety of intended rotational positions
  • various holding devices e.g. B. clamps, other eccentrics or Latches etc.
  • FIG. 1 shows a schematic illustration of an offset printing machine 100, preferably a web-fed offset printing machine, with a first plate cylinder 4, a first Blanket cylinder 14, a second blanket cylinder 34 and a second Plate cylinder 44.
  • Both plate cylinders 4, 44 can be designed according to the invention, as described in more detail below.
  • Fig. 2 shows a printing plate 1 of the printing press 100, with a leading edge 1A and one Trailing edge 1B.
  • the plate cylinder 4 carrying the printing plate 1 has a plate gap 3 with a first side 3A and a second side 3B into which the leading edge 1A and Trailing edge 1B are insertable.
  • An eccentric shaft 2 comprises one with respect to one Bore axis 35 eccentric axis 20.
  • the eccentric shaft 2 is in a bore 5 of the Plate cylinder 4 preferably in the vicinity of the front and rear edges 1A, 1B receiving plate gap 3 rotatably and can be done by hand or automatically via a, schematically indicated by the reference numeral 40, or Device arranged on both sides of the eccentric shaft 2 is moved or rotated and preferably also be moved in the axial direction.
  • the eccentric shaft 2 can exert a force or pressure on the front and Exercise the rear edge 1A, 1B of the pressure plate in order to urge and close it jam so that undesired movement of the front and rear edges 1A, 1B and errors in the printed image can be prevented. It also prevents that the front and rear edge 1A, 1B at high printing speed from the gap 3rd slip out.
  • Fig. 3 shows a second embodiment of the invention, in which a printing plate 1 with a Front edge 1A and a rear edge 1B is applied to the plate cylinder 4.
  • the Plate cylinder 4 has a plate gap 3, which the front edge 1A and Takes up rear edge 1B.
  • An eccentric shaft 2 has one with respect to a bore axis 35 on a hole 5 formed in the plate cylinder 4 and eccentric axis 20 preferably in the vicinity of the one receiving the front and rear edges 1A, 1B Plate gap 3 arranged.
  • the bore has an additional recess into which a Finger-like projection 22 is movable.
  • FIG. 4, 5 and 6 show differently shaped finger-like projections for holding the plate, e.g. B. a projection 122 with a rectangular cross section, a projection 222 with a triangular cross section and a projection 322 with a semicircular cross section. It is conceivable that a plurality of projections axially along the eccentric shaft 2 can be provided and that any combination on the eccentric shaft differently formed projections can be used.
  • the distance between the Ends 1A and 1B of the printing plate and the printing plate ends 1A, 1B facing Edges of the openings 15 can for example be in the range between 0.5 mm and 5-10 mm lie, the openings 15 for a better engagement of the finger-like projections 22-322 when rotating the eccentric shaft, for example, be formed like an elongated hole can.
  • the distance between the edge of the plate ends is 1A, 1B and always measure this facing edge of the openings 15 sufficiently that a secure hold of the printing plate on the plate cylinder 4 even at the highest Production speeds are still ensured.
  • the eccentric shaft 2 has a roughened surface has to the coefficient of friction between the surfaces of the shaft and the Ends 1A, 1B of the pressure plate increase, which makes the clamping process more advantageous Way is improved.
  • eccentric shaft 2 On the eccentric shaft 2 can be used to determine the eccentric shaft 2 in different Rotational positions a variety of holding devices, e.g. B. clamps, additional eccentrics or latches can be arranged to prevent loosening of the plate and that To facilitate application of the plate to the plate cylinder.
  • holding devices e.g. B. clamps, additional eccentrics or latches can be arranged to prevent loosening of the plate and that To facilitate application of the plate to the plate cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Screen Printers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP99120106A 1998-10-23 1999-10-08 Cylindre de plaque dans une machine d'impression avec dispositif de tension de plaque Expired - Lifetime EP0995597B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/178,226 US6131513A (en) 1998-10-23 1998-10-23 Printing press with simple lock-up plate cylinder
US178226 1998-10-23

Publications (2)

Publication Number Publication Date
EP0995597A1 true EP0995597A1 (fr) 2000-04-26
EP0995597B1 EP0995597B1 (fr) 2002-08-21

Family

ID=22651723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120106A Expired - Lifetime EP0995597B1 (fr) 1998-10-23 1999-10-08 Cylindre de plaque dans une machine d'impression avec dispositif de tension de plaque

Country Status (4)

Country Link
US (1) US6131513A (fr)
EP (1) EP0995597B1 (fr)
AT (1) ATE222539T1 (fr)
DE (2) DE59902404D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170124A1 (fr) * 2000-07-06 2002-01-09 Tokyo Kikai Seisakusho Ltd. Dispositif pour tendre un revêtement sur un cylindre d'une machine à imprimer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080282917A1 (en) * 2007-05-15 2008-11-20 Goss International Americas, Inc. Cylinder with reduced inertia variation and method
EP2253471A1 (fr) * 2009-05-18 2010-11-24 Müller Martini Holding AG Cylindre de pression doté d'un tissu en caoutchouc pour une presse rotative offset à rouleaux

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415622A1 (de) * 1994-05-04 1995-11-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19642141C1 (de) * 1996-10-12 1998-06-18 Koenig & Bauer Albert Ag Vorrichtung zum Lösen von Platten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016010A (en) * 1959-08-20 1962-01-09 Cottrell Company Printing press plate clamping means for prebent wrap around printing plates of soft material
US3727551A (en) * 1971-07-22 1973-04-17 North American Rockwell Reversible lockup for flexible printing plate
US4495865A (en) * 1983-03-15 1985-01-29 Komori Printing Machinery Co., Ltd. Plate clamping device of web-fed rotary printing press
DE3326215C2 (de) * 1983-07-21 1986-04-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Aufspannen einer Druckplatte oder eines Gummituches
DE4005093C1 (en) * 1990-02-17 1991-06-20 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Forme clamp for printing cylinder - has channel in cylinder with spindle to clamp form eccentrically
DE19509559C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Spannvorrichtung
DE19509563C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Zylinder mit einer Vorrichtung zum Spannen von Platten
US5749298A (en) * 1997-06-10 1998-05-12 Reeves Brothers, Inc. Arrangement for securing a printing blanket to a cylinder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415622A1 (de) * 1994-05-04 1995-11-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19642141C1 (de) * 1996-10-12 1998-06-18 Koenig & Bauer Albert Ag Vorrichtung zum Lösen von Platten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170124A1 (fr) * 2000-07-06 2002-01-09 Tokyo Kikai Seisakusho Ltd. Dispositif pour tendre un revêtement sur un cylindre d'une machine à imprimer

Also Published As

Publication number Publication date
ATE222539T1 (de) 2002-09-15
DE19948954A1 (de) 2000-04-27
US6131513A (en) 2000-10-17
EP0995597B1 (fr) 2002-08-21
DE59902404D1 (de) 2002-09-26

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