EP0592856B1 - Dispositif de serrage pour fixer une forme d'impression flexible à la surface d'un cylindre - Google Patents

Dispositif de serrage pour fixer une forme d'impression flexible à la surface d'un cylindre Download PDF

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Publication number
EP0592856B1
EP0592856B1 EP93115536A EP93115536A EP0592856B1 EP 0592856 B1 EP0592856 B1 EP 0592856B1 EP 93115536 A EP93115536 A EP 93115536A EP 93115536 A EP93115536 A EP 93115536A EP 0592856 B1 EP0592856 B1 EP 0592856B1
Authority
EP
European Patent Office
Prior art keywords
clamping
cylinder
channel
clamping device
forme
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
EP93115536A
Other languages
German (de)
English (en)
Other versions
EP0592856A1 (fr
Inventor
Werner Weber
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 EP0592856A1 publication Critical patent/EP0592856A1/fr
Application granted granted Critical
Publication of EP0592856B1 publication Critical patent/EP0592856B1/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

  • Solutions are known in which the leading end of the printing form is bent at an acute angle and is suspended in a groove of the cylinder which is undercut at the same angle.
  • the trailing end of the printing form is gripped by a holding element which is fastened to an axially parallel tension shaft and which, when the tension shaft rotates, applies a tensile force to the trailing end in the tangential direction.
  • a holding element which is fastened to an axially parallel tension shaft and which, when the tension shaft rotates, applies a tensile force to the trailing end in the tangential direction.
  • the published patent application DT 25 23 580 A1 describes a device for tensioning flexible printing forms, in which the printing form ends were each bent at an acute angle.
  • a tensioning shaft With a tensioning shaft, a bar, which engages behind the trailing end of the printing form, and a leaf spring with a clamping body seated at the end are firmly connected as holding and tensioning elements.
  • the tensioning shaft When the tensioning shaft is rotated, the clamping body presses the leading end of the printing form against the side wall of the cylinder channel, while the trailing end is fixed between the bar and the clamping body.
  • the tensioning shaft is turned, the trailing end is taken along by the bar in the tangential direction, so that the pressure plate on the cylinder surface is tightened.
  • the trailing end of the printing form which is bent at an acute angle, is disadvantageous when it is inserted into the channel. Furthermore, the bar causes a notch effect in the area already used by the bending, which can affect the service life and reusability.
  • the device shown in the patent DE 26 20 427 C3 contains as a resilient element an elastic clamping body, so that the risk of overexpansion is alleviated is, but the disadvantages regarding said notch effect and handling remain.
  • the printing plate tensioning device according to the patent specification DE 21 16 570 C3 has similar disadvantages, in which no resilient element is provided and the said second folding is only carried out during the tensioning process. The handling of the pressure plate in a repeated clamping process is greatly affected.
  • one clamping bar is provided on each clamping shaft for the two ends of a printing form which are pre-folded at an acute angle, the clamping bars being supported against compression springs.
  • the disadvantage here is that two tensioning strips and two tensioning shafts, each with separate drives, are required, which requires increased effort.
  • the inclusion of the leading end of the printing form by means of a spring-loaded clamping bar causes the printing form to float on the cylinder, which can have an adverse effect on the print quality.
  • Another device for fastening a flexible pressure plate includes three clamping shafts which are arranged coaxially and can be rotated independently of one another. Terminal strips are attached to the inner solid shaft and the inner hollow shaft. A clamping bar is screwed onto the outer hollow shaft. The clamping strips allow the two ends of the pressure plate to be clamped independently of one another and, with the aid of the clamping strip, an additional one Tension of the trailing end of the pressure plate. Pressure springs, which are attached between the clamping strips, ensure that a uniform clamping force is exerted on the trailing end of the pressure plate. With this solution, the insertion of the trailing end is problematic because there are a large number of gaps that can accommodate the printing plate. Furthermore, the solution is costly in terms of material and costs due to the three clamping shafts and two clamping strips and the clamping strip with the respective actuating elements.
  • the object of the invention is to develop a clamping device for fastening a flexible printing form on the lateral surface of a cylinder, which can be produced with little effort, which enables quick clamping with little effort and which only requires little pressure on the printing form, so that multiple use is possible is.
  • a resilient element with two legs is attached to a tension shaft arranged in the channel of a cylinder, the trailing first leg seen in the direction of rotation of the cylinder protruding freely into the channel and the other leg of the first leg Leg protrudes in the radial direction. Furthermore, the solution is that the trailing end of the printing form, which is bent at an obtuse angle, rests against an axially extending edge which is part of the leading side surface of the channel.
  • the resilient element ensures automatic re-tensioning of the printing form.
  • the clamping device requires only a few components and a small installation space, so that the channel-related pressure-free edge of the plate cylinder can be reduced to two millimeters.
  • the clamping device can be used both for cylinders with a simple diameter to hold a printing form on the cylinder circumference and for Realize cylinders of multiple diameters for receiving several printing forms on the cylinder circumference, such a clamping device then being assigned to each printing form that is to be clamped on the cylinder.
  • the second leg can advantageously be rounded in the direction of the trailing end of the printing form and can rest on the trailing side surface in the untensioned state. If the side walls of the channel are undercut as usual, then the legs in no way hinder the insertion of the trailing end of the printing form. For the same reason, it is advantageous if the ends of the legs are arranged inclined to one another.
  • the width of the groove of the tensioning shaft should be larger than the greatest width of the channel, the channel opening into the groove in the untensioned state.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (5)

  1. Dispositif de fixation d'une forme flexible d'impression (5) sur la surface de l'enveloppe d'un cylindre (1), dans lequel l'extrémité amont (3) de la forme d'impression (5) est tenue dans une rainure (6) en forme de fente du cylindre (1) qui est orientée le long d'une génératrice et dans lequel l'extrémité aval (4) de la forme d'impression (5), qui est coudée suivant un angle obtus, est insérée dans un canal (2) parallèle à l'axe et usiné dans la surface de l'enveloppe, un arbre tendeur rotatif (7) parallèle à l'axe étant prévu et permettant de déplacer au moins un élément élastique (11), qui est fixé à l'arbre tendeur (7), contre l'extrémité aval (4) de la forme d'impression (5),
       caractérisé
       en ce que l'extrémité aval (4) de la forme d'impression (5) est en appui à partir d'une arête (23) orientée axialement et faisant partie d'une surface latérale amont (24) du canal (2) et en ce que les éléments élastiques (11) comprennent deux ailes (14, 15), l'une des ailes (14, 16) à l'état détendu pénétrant librement dans le canal (2) et l'autre aile (15, 17) dépassant en hauteur la première aile (14, 16) en direction radiale.
  2. Dispositif de fixation selon la revendication 1,
       caractérisé
       en ce que la seconde aile (15) présente un arrondi (19) orienté vers l'extrémité aval (4) de la forme d'impression (5).
  3. Dispositif de fixation selon les revendications 1 à 2,
       caractérisé
       en ce qu'à l'état détendu de la fixation, la seconde aile (15, 17) est en appui sous précontrainte élastique contre la surface latérale aval (20) du canal (2).
  4. Dispositif de fixation selon les revendications 1 à 3,
       caractérisé
       en ce que les extrémités (16, 17) des ailes (14, 15) sont inclinées l'une vers l'autre.
  5. Dispositif de fixation selon les revendications 1 à 4,
       caractérisé
       en ce que chacun des éléments élastiques (11) se compose d'une pièce du type d'une lame de ressort en U qui est fixée par son âme (10) sur la surface du fond (9) d'une rainure rectangulaire (8) de l'arbre tendeur (7), la première aile (14) de l'élément élastique (11) étant en appui à l'état détendu contre la surface latérale (18) de la rainure rectangulaire (8).
EP93115536A 1992-10-12 1993-09-27 Dispositif de serrage pour fixer une forme d'impression flexible à la surface d'un cylindre Expired - Lifetime EP0592856B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4234332A DE4234332A1 (de) 1992-10-12 1992-10-12 Aufspannvorrichtung zum Befestigen einer biegsamen Druckform auf der Mantelfläche eines Zylinders
DE4234332 1992-10-12

Publications (2)

Publication Number Publication Date
EP0592856A1 EP0592856A1 (fr) 1994-04-20
EP0592856B1 true EP0592856B1 (fr) 1997-01-08

Family

ID=6470254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115536A Expired - Lifetime EP0592856B1 (fr) 1992-10-12 1993-09-27 Dispositif de serrage pour fixer une forme d'impression flexible à la surface d'un cylindre

Country Status (4)

Country Link
US (1) US5423258A (fr)
EP (1) EP0592856B1 (fr)
JP (1) JPH06191016A (fr)
DE (2) DE4234332A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737149B1 (fr) * 1995-07-25 1997-10-17 Heidelberg Harris Sa Dispositif de fixation d'une plaque d'impression sur un cylindre porte-plaque
DE29600845U1 (de) * 1996-01-19 1996-03-07 Roland Man Druckmasch Vorrichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder
DE19841912A1 (de) * 1998-09-14 2000-03-16 Roland Man Druckmasch Vorrichtung zum Befestigen von biegsamen Druckformen
ATE255502T1 (de) * 1999-03-26 2003-12-15 Heidelberger Druckmasch Ag Einrichtung zum spannen von druckplatten in spannkanälen reduzierter grösse
JP4666707B2 (ja) * 1999-12-21 2011-04-06 株式会社ミヤコシ 版胴における刷版クイックくわえ装置
DE102004034049A1 (de) * 2004-07-13 2006-02-09 Man Roland Druckmaschinen Ag Formzylinder einer Rollenrotationsdruckmaschine
DE102009047674A1 (de) * 2009-12-08 2011-06-09 Manroland Ag Druckwerk einer Druckmaschine und Verfahren zum Wechseln mindestens einer Druckplatte an einem solchen Druckwerk

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE261770C (fr) *
DE290626C (fr) * 1913-09-08
US2961951A (en) * 1958-04-24 1960-11-29 Koppers Co Inc Holding device
DE1246764B (de) * 1964-10-26 1967-08-10 Winkler Maschf Aufspanneinrichtung fuer biegsame Druckplatten
NL6511614A (fr) * 1964-10-26 1966-04-27
US3626848A (en) * 1969-06-09 1971-12-14 American Rockwell Corp Lockup for thin plates
DE2017416C3 (de) * 1970-04-11 1974-01-03 Koenig & Bauer Ag, 8700 Wuerzburg Vorrichtung zum Befestigen von biegsamen Druckplatten auf Formzylindern von Rotationsdruckmaschinen
SU371093A1 (ru) * 1970-04-17 1973-02-22 , вители Устройство для закрепления формной пластины на цилиндре
US3727551A (en) * 1971-07-22 1973-04-17 North American Rockwell Reversible lockup for flexible printing plate
US3757691A (en) * 1972-06-12 1973-09-11 North American Rockwell Printing cylinder
DE2334127A1 (de) * 1973-07-05 1975-01-23 Koenig & Bauer Ag Vorrichtung zum befestigen und spannen von biegsamen druckplatten
DE2523580C3 (de) * 1975-05-28 1978-06-15 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Befestigen von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen
DE2620427C3 (de) * 1976-05-08 1979-03-08 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Befestigen von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen
US4104968A (en) * 1976-06-03 1978-08-08 Albert-Frankenthal Ag Clamping device for flexible printing plates
DE2757552C2 (de) * 1977-12-23 1982-06-24 Koenig & Bauer AG, 8700 Würzburg Formzylinder für eine Rotationsdruckmaschine
GB2092069B (en) * 1981-02-02 1984-09-19 Rockwell International Corp Web lithographic press row identifier
DD261770A1 (de) * 1987-07-02 1988-11-09 Polygraph Leipzig Vorrichtung zum befestigen einer biegsamen druckplatte
DD290627A5 (de) * 1989-12-22 1991-06-06 Veb Kombinat Polygraph "Werner Lamberz",De Vorrichtung zum befestigen einer biegsamen druckplatte
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
DE4035627A1 (de) * 1990-11-09 1992-05-14 Bosch Gmbh Robert Arbeitszylinder
JP3030582B2 (ja) * 1991-09-19 2000-04-10 株式会社小森コーポレーション 輪転印刷機の刷版交換装置

Also Published As

Publication number Publication date
DE59305047D1 (de) 1997-02-20
DE4234332A1 (de) 1994-04-14
US5423258A (en) 1995-06-13
EP0592856A1 (fr) 1994-04-20
JPH06191016A (ja) 1994-07-12

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