EP0331777A1 - Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative - Google Patents

Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative Download PDF

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Publication number
EP0331777A1
EP0331777A1 EP88103685A EP88103685A EP0331777A1 EP 0331777 A1 EP0331777 A1 EP 0331777A1 EP 88103685 A EP88103685 A EP 88103685A EP 88103685 A EP88103685 A EP 88103685A EP 0331777 A1 EP0331777 A1 EP 0331777A1
Authority
EP
European Patent Office
Prior art keywords
tensioning
cylinder
pit
clamping
pistons
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
EP88103685A
Other languages
German (de)
English (en)
Other versions
EP0331777B1 (fr
Inventor
Ingo Köbler
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
Priority to DE19873707066 priority Critical patent/DE3707066A1/de
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to EP19880103685 priority patent/EP0331777B1/fr
Publication of EP0331777A1 publication Critical patent/EP0331777A1/fr
Application granted granted Critical
Publication of EP0331777B1 publication Critical patent/EP0331777B1/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
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1237—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially perpendicular to support surface
    • 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
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a tensioning device for fastening an elevator to the cylinder of a rotary printing press - preferably blanket tensioning device to the blanket cylinder of a web offset rotary printing press - according to the preamble of patent claim 1.
  • Such a clamping device is known from US Pat. No. 2,209,127 for the attachment of printing plates to a plate cylinder.
  • this tensioning device both ends of a support carrying the actual printing plates are inserted into two recesses of the same height on a tensioning bar. Thereupon, the tensioning strip is moved in the direction of the center of the cylinder by screwing in screws passed through it and anchored in the bottom of a cylinder pit.
  • This device has the disadvantage that a uniform movement of the numerous screws distributed over the length of a pit is required to achieve a uniform tension of the elevator. Such a uniform screwing in of the screws can be achieved either only with increased expenditure on operating personnel or with a complex device.
  • the invention is based on the object of developing a generic tensioning device in such a way that it enables uniform tensioning of the elevator over the entire cylinder length with simple operation from a single point.
  • a pit 2 with a rectangular cross section is machined parallel to its axis. From the bottom 3 of this pit 2, blind-hole-like bores are made at regular intervals towards the center of the cylinder, which serve as working cylinders 4 for pistons 5 which are axially movable therein.
  • the working cylinders 4 are closed to the pit floor 3 by cover plates 6.
  • the cover plates 6 fastened in the pit floor 3 by means of screws 7 each have a central passage bore 8.
  • a piston rod 9 fastened to the piston 5 is led upwards out of the working cylinder 4.
  • the free end of the guided out piston rod 9 is provided with a thread which is screwed into a blind hole thread 10 on the underside of a clamping bar 11.
  • a lock nut 12 arranged on the thread of the piston rod 9 allows the distance between the piston 5 and the clamping bar 11 to be adjusted.
  • the tensioning strip 11 In its lower part, the tensioning strip 11 has a width which corresponds approximately to that of the pit 2. In the upper part, the clamping strip 11 is reduced in width on both sides by two recesses 13 and 14 which are rectangular in cross section. The cutouts 13 and 14 are bounded at the top by two laterally projecting shoulders 15 and 16 at the outer end of the tensioning strip 11.
  • a feed channel 18 opens out at the side, the other end of which is connected to a pressure storage space 19 provided inside the blanket cylinder 1.
  • the pressure storage space 19 can be filled with a pressurized fluid via a check valve 21 inserted into a side wall 20 of the blanket cylinder 1.
  • the pressure storage space 19 is filled with a pressurized fluid, for example compressed air.
  • a pressurized fluid for example compressed air.
  • the fluid reaches the working spaces of the working cylinders 4 above the pistons 5 via the supply channels 18 17 exceeds, the pistons 5 are moved downward and the clamping bar 11 is slowly pulled down over the piston rods 9. Due to the controlled pressure increase, the rubber blanket 24 can be subjected to a precisely defined tension, regardless of slight length differences.
  • the pressure storage space 19 is simply relieved of the storage pressure via the valve 21 or a special relief valve (not shown).
  • the spring 17 ⁇ is arranged above the piston 5 in the working cylinder 4.
  • the clamping bar 11 holds its compressive force in the basic position in the pit 2.
  • the feed channel 18 ⁇ opens into the lower part of the working cylinder 4. Accordingly, energy is applied to the piston 5 only for extending the tensioning strip 11 for a change of the rubber blanket 24.
  • the pressure storage space 19 in the interior of the cylinder is relieved of pressure.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP19880103685 1987-03-05 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative Expired - Lifetime EP0331777B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873707066 DE3707066A1 (de) 1987-03-05 1987-03-05 Spannvorrichtung zur befestigung eines aufzuges am zylinder einer rotationsdruckmaschine
EP19880103685 EP0331777B1 (fr) 1988-03-09 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880103685 EP0331777B1 (fr) 1988-03-09 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Publications (2)

Publication Number Publication Date
EP0331777A1 true EP0331777A1 (fr) 1989-09-13
EP0331777B1 EP0331777B1 (fr) 1991-09-04

Family

ID=8198788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880103685 Expired - Lifetime EP0331777B1 (fr) 1987-03-05 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Country Status (1)

Country Link
EP (1) EP0331777B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5080014A (en) * 1989-10-14 1992-01-14 Heidelberger Druckmaschinen Ag Device for elastically deforming a printing plate
EP0638421A1 (fr) * 1993-08-05 1995-02-15 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Cylindre à blanchet ou cylindre d'impression
WO1997047472A1 (fr) * 1996-06-13 1997-12-18 Mark Andy Inc. Dispositif de serrage pour plaques d'impression
EP0974459A1 (fr) * 1998-07-20 2000-01-26 Heidelberger Druckmaschinen Aktiengesellschaft Cylindre blanchet dans une machine rotative

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2555037A1 (de) * 1975-12-06 1977-06-08 Philips Patentverwaltung Abtastgeraet mit einer drehbaren walze zum aufspannen eines aufzeichnungsblattes
EP0095954A1 (fr) * 1982-05-27 1983-12-07 Jean Pierre Cuir Dispositif de fixation d'une plaque sur un cylindre
DE3707066A1 (de) * 1987-03-05 1988-09-15 Roland Man Druckmasch Spannvorrichtung zur befestigung eines aufzuges am zylinder einer rotationsdruckmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2555037A1 (de) * 1975-12-06 1977-06-08 Philips Patentverwaltung Abtastgeraet mit einer drehbaren walze zum aufspannen eines aufzeichnungsblattes
EP0095954A1 (fr) * 1982-05-27 1983-12-07 Jean Pierre Cuir Dispositif de fixation d'une plaque sur un cylindre
DE3707066A1 (de) * 1987-03-05 1988-09-15 Roland Man Druckmasch Spannvorrichtung zur befestigung eines aufzuges am zylinder einer rotationsdruckmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5080014A (en) * 1989-10-14 1992-01-14 Heidelberger Druckmaschinen Ag Device for elastically deforming a printing plate
EP0638421A1 (fr) * 1993-08-05 1995-02-15 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Cylindre à blanchet ou cylindre d'impression
US5461981A (en) * 1993-08-05 1995-10-31 Koenig & Bauer Aktiengesellschaft Press blanket cylinder with blanket end ejection device
WO1997047472A1 (fr) * 1996-06-13 1997-12-18 Mark Andy Inc. Dispositif de serrage pour plaques d'impression
US5735211A (en) * 1996-06-13 1998-04-07 Mark Andy, Inc. Clamping and tensioning device for printing plates
EP0974459A1 (fr) * 1998-07-20 2000-01-26 Heidelberger Druckmaschinen Aktiengesellschaft Cylindre blanchet dans une machine rotative

Also Published As

Publication number Publication date
EP0331777B1 (fr) 1991-09-04

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