EP0755785A1 - Dispositif de fixation d'une plaque avec réduction de la zÔne sans pression - Google Patents

Dispositif de fixation d'une plaque avec réduction de la zÔne sans pression Download PDF

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Publication number
EP0755785A1
EP0755785A1 EP96111368A EP96111368A EP0755785A1 EP 0755785 A1 EP0755785 A1 EP 0755785A1 EP 96111368 A EP96111368 A EP 96111368A EP 96111368 A EP96111368 A EP 96111368A EP 0755785 A1 EP0755785 A1 EP 0755785A1
Authority
EP
European Patent Office
Prior art keywords
printing form
printing
channel
cylinder
fastening
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
EP96111368A
Other languages
German (de)
English (en)
Other versions
EP0755785B1 (fr
Inventor
Jacques Métrope
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
Goss International Montataire SA
Original Assignee
Heidelberger Druckmaschinen AG
Heidelberg Harris SA
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, Heidelberg Harris SA filed Critical Heidelberger Druckmaschinen AG
Publication of EP0755785A1 publication Critical patent/EP0755785A1/fr
Application granted granted Critical
Publication of EP0755785B1 publication Critical patent/EP0755785B1/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
    • B41F27/1243—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 pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • the invention relates to a plate clamping device for reducing the pressure-free area on the circumference of a printing form cylinder in the printing unit of a rotary printing press.
  • EP 0 585 625 A1 relates to a device for fastening a flexible pressure plate.
  • a plurality of leaf-shaped springs are inserted into a cylinder slot, which have two legs abutting the slot, one leg being extended and tensioning the folds of the pressure plate.
  • EP 0 531 741 A1 relates to a plate leading edge attachment of a printing plate to printing machines.
  • a clamping device has two flat clamping surfaces running at right angles to the cylinder radius, which enable the front edge of the printing plate to be fastened without significant deformation. This is achieved in that the radius of the outer surface of the plate cylinder in the area of the insertion opening for inserting the pressure plate is smaller than the cylinder radius, and that the cylinder radius is at least so large that no permanent deformation of the same can occur due to the tensioning of a commercially available pressure plate.
  • a clamping device for fastening a printing form on the lateral surface of a cylinder has become known.
  • a clamping device should be able to be manufactured with little effort, enable rapid clamping with little effort and the printing form as far as possible low stress, so that their multiple use is possible.
  • a resilient element with two legs is fastened to a tension shaft arranged in the channel of a cylinder, the first leg trailing in the direction of rotation of the cylinder protruding freely into the channel in the prestressed state and the other leg projecting beyond the first leg in the radial direction.
  • the solution is that the trailing end of the printing form, which is bent at an obtuse angle, rests against an axially leading edge, which is part of the trailing side surface of the channel.
  • This collecting device is particularly suitable for web-fed rotary printing presses.
  • EP 0 453 794 A1 relates to a method and a device for fastening a pressure plate on a cylinder with a narrow channel.
  • a pressure plate with an extended end part is received in a narrow channel of a cylinder and held on a curved side wall of the channel by a clamping piece filled with resilient material.
  • the clamp pushes the extended end portion of the pressure plate against the side wall in a direction normal to the side wall to reduce the longitudinal stress on the end portion.
  • the front edge of the printing form is attached to the opposite side of the channel.
  • the present invention is based on the object of minimizing the clamping channel necessary for fastening the end parts of a printing form on a printing form cylinder and thus the non-printing area on the peripheral surface of the printing form cylinder.
  • the side wall of the channel having the projection is provided with a bevel.
  • the printing form to be tensioned touches the projection linearly, so that the tangential tensile force is introduced evenly over the width of the cylinder into the printing form.
  • the projection extends over the entire width of the printing form; the side wall of the channel can be provided with a hardened coating in the region of the projection.
  • a particularly wear-resistant material as a strip or rod can be embedded in the side wall of the channel in such a way that it forms the projection around which the printing form edge is drawn during tensioning on the lateral surface of the cylinder.
  • the clamping element which touches the printing form edge to be stretched linearly, is resilient in a rotatable crossmember in the lower part of the channel of the printing form cylinder let in. In the state in which the printing forme edge is tensioned, the tensioning element can be set resiliently against the printing forme edge and can be locked in this position.
  • Fig. 1 shows a greatly enlarged section of the channel of a printing form cylinder.
  • a printing couple cylinder 1 - here the printing form cylinder - comprises a channel 2 which extends axially parallel to the axis of rotation of the printing form cylinder.
  • the ends of a printing form 3, that is to say the printing form leading edge 4 and the printing form trailing edge 5, are hung in the channel 2.
  • the printing form front edge 4 lies against a front side wall 8 of the channel 2, while the printing form rear edge 5 lies against the rear side wall 9 of the channel 2 in the tensioned state, represented by position 5.5.
  • the printing form trailing edge 5 is successively moved into the position 5.4 in accordance with the insertion positions 5.1, 5.2 and 5.3.
  • the envelope curve which describes the printing form trailing edge 5 during the insertion process, is identified by reference numeral 6 designated. 1 that one of the side walls 8, 9 of the channel 2 has a recess 10, below which a projection 11 is shown. Both the recess 10 and the projection 11 extend over the entire width of the printing form cylinder 1.
  • the side wall 9 of the channel 2 can be hardened in the region of the projection 11 by means of a known hardening method in order to prevent wear.
  • a clamping element 7 can be seen around the lower region of the channel 2 in FIG. 1, which can be moved from a provisional clamping position 7.1 into a clamping position 7.2 and vice versa.
  • the printing edge 4 is fixed.
  • the printing form leading edge 4 is secured in this way.
  • the printing form front edge 4 is held by the provisional clamping position 7.1. If the clamping element 7 is placed in position 7.2 - the clamping position - there is a linear contact at the contact point between the clamping element 7 and the printing form trailing edge 5.
  • the area of the printing form trailing edge protruding beyond the projection 11 moves 5 in its stop position 5.5.
  • the projection 11 serves as a pivot point about which the printing form trailing edge 5 moves, so that the peripheral surface 20 of the printing form moves in the direction of the center of the channel 2.
  • the pivoting movement of the printing form trailing edge 5 around the projection 11 causes a tangentially acting force in the Printing form 3 initiated, which causes a reduction in the pressure-free gap on the channel 2, since the printing form leading edge 4 and the printing form trailing edge 5 move towards one another on the circumference of the printing form cylinder 1.
  • the printing form trailing edge 5 has been moved into the stop position 5.5 by the clamping element 7, then the printing form 3 is clamped on the outer surface of the printing form cylinder 1.
  • the clamping element 7 is now locked in its clamping position 7.2, so that the printing form attachment is maintained.
  • the clamping element 7 can also extend over the width of the channel 2 in the printing form cylinder 1 or consist of individual resilient tongues. When the printing form trailing edge 5 is in its stop position 5.5, the clamping element 7 is resiliently engaged on it.
  • Fig. 2 shows a larger section of the end face of a printing form cylinder.
  • the printing form leading edge 4 and the printing form trailing edge 5 are shown reduced, as is the representation of the clamping element 7 in its positions 7.1 and 7.2.
  • the clamping element 7 - be it a continuous component or several individual tongues - is accommodated in a crossmember 12, which can be rotated in a bore 13 in the printing form cylinder 1.
  • the cross member 12 is provided with a lever 14 which can be pivoted via an actuator 17 - for example a pneumatic cylinder.
  • an actuator 17 for example a pneumatic cylinder.
  • a bolt 16 is provided which extends through both the lever 14 and a fork 15, the fork 15 being adjustable by the actuator 17.
  • the actuator 17 itself can be accommodated in a rotatable abutment 18 on an end face of the printing form cylinder 1; an arrangement on both end faces of the printing form cylinder 1 would also be conceivable.
  • the actuator 17 in the example shown here is is a pneumatic cylinder, the chambers of which are acted upon by connections 19 with a pressure medium.
  • An electric motor or a hydraulic cylinder or the like could also be used to actuate the crossmember 12.
  • Fig. 2 the positions of the components 17, 15, 16, 14 and 7 shown with solid lines denote the clamping position 7.2 of the printing form trailing edge 5 by the clamping element 7, while the positions of the components 17, 15, 16, 14 and 7 correspond to the provisional clamping position 7.1 of the printing form leading edge 4 through the clamping element 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Arc Welding In General (AREA)
EP96111368A 1995-07-25 1996-07-15 Dispositif de fixation d'une plaque avec réduction de la zône sans pression Expired - Lifetime EP0755785B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9509001A FR2737149B1 (fr) 1995-07-25 1995-07-25 Dispositif de fixation d'une plaque d'impression sur un cylindre porte-plaque
FR9509001 1995-07-25

Publications (2)

Publication Number Publication Date
EP0755785A1 true EP0755785A1 (fr) 1997-01-29
EP0755785B1 EP0755785B1 (fr) 2001-04-04

Family

ID=9481341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111368A Expired - Lifetime EP0755785B1 (fr) 1995-07-25 1996-07-15 Dispositif de fixation d'une plaque avec réduction de la zône sans pression

Country Status (5)

Country Link
US (1) US5778786A (fr)
EP (1) EP0755785B1 (fr)
AT (1) ATE200249T1 (fr)
DE (2) DE19619941A1 (fr)
FR (1) FR2737149B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862991B2 (en) 2000-11-28 2005-03-08 Koenig & Bauer Ajtuebgesekkscgaft Cylinder and device for securing a flexible packing on the cylinder
FR2898297A1 (fr) * 2006-03-08 2007-09-14 Goss Int Montataire Sa Cylindre de plaque et presse rotative correspondante.

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060984B4 (de) 2000-12-08 2006-10-26 Man Roland Druckmaschinen Ag Vorichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder
DE10208262A1 (de) 2002-02-26 2003-09-04 Roland Man Druckmasch Vorrichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder
DE10261954B4 (de) * 2002-04-25 2006-08-03 Koenig & Bauer Ag Zylinder einer Rotationsdruckmaschine
DE10218475B4 (de) * 2002-04-25 2006-06-29 Koenig & Bauer Ag Zylinder einer Rotationsdruckmaschine mit einem Aufzug
DE10250684B3 (de) * 2002-10-31 2004-04-01 Koenig & Bauer Ag Verfahren zur Herstellung eines Rotationskörpers und Rotationskörper einer Druckmaschine
US10737481B2 (en) * 2017-07-03 2020-08-11 Manroland Goss Web Systems Gmbh Plate cylinder with plate lockup mechanism and related printing press and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265837A (fr) * 1959-10-29 1961-07-07 Goebel Gmbh Maschf Dispositif de fixation de plaques gravées flexibles, notamment de plaques pour impression taille-douce sur acier
DE4335140C1 (de) * 1993-10-15 1995-02-02 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125023A (en) * 1964-03-17 Blanket tensioning means for the impression
US948157A (en) * 1909-05-13 1910-02-01 Alexander Bevan Surfacing-roll.
US2900904A (en) * 1953-06-08 1959-08-25 Hantscho George Printing press rollers
US2837025A (en) * 1956-05-08 1958-06-03 American Can Co Clamping and tensioning device
DE1228627B (de) * 1964-04-25 1966-11-17 Roland Offsetmaschf Vorrichtung zum Befestigen einer biegsamen Druckplatte auf dem Formzylinder einer Rotationsdruckmaschine
US3362327A (en) * 1965-01-28 1968-01-09 Cottrell Company Cylinder lockup for wrap-around plates and blankets
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
CA2038809C (fr) * 1990-04-24 1998-12-08 Albert Gevis Methode et appareil de montage de plaque d'impression a gorge etroite
DE4129046A1 (de) * 1991-08-31 1993-03-11 Heidelberger Druckmasch Ag Plattenvorderkantenbefestigung einer druckplatte an druckmaschinen
DE4225949C2 (de) * 1992-08-06 1994-10-13 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE4234332A1 (de) * 1992-10-12 1994-04-14 Heidelberger Druckmasch Ag Aufspannvorrichtung zum Befestigen einer biegsamen Druckform auf der Mantelfläche eines Zylinders

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265837A (fr) * 1959-10-29 1961-07-07 Goebel Gmbh Maschf Dispositif de fixation de plaques gravées flexibles, notamment de plaques pour impression taille-douce sur acier
DE4335140C1 (de) * 1993-10-15 1995-02-02 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862991B2 (en) 2000-11-28 2005-03-08 Koenig & Bauer Ajtuebgesekkscgaft Cylinder and device for securing a flexible packing on the cylinder
FR2898297A1 (fr) * 2006-03-08 2007-09-14 Goss Int Montataire Sa Cylindre de plaque et presse rotative correspondante.

Also Published As

Publication number Publication date
EP0755785B1 (fr) 2001-04-04
DE19619941A1 (de) 1997-01-30
US5778786A (en) 1998-07-14
ATE200249T1 (de) 2001-04-15
FR2737149B1 (fr) 1997-10-17
DE59606691D1 (de) 2001-05-10
FR2737149A1 (fr) 1997-01-31

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