EP0429808B1 - Dispositif pour tendre avec un repérage exact une plaque d'impression sur un cylindre d'impression - Google Patents

Dispositif pour tendre avec un repérage exact une plaque d'impression sur un cylindre d'impression Download PDF

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Publication number
EP0429808B1
EP0429808B1 EP90119357A EP90119357A EP0429808B1 EP 0429808 B1 EP0429808 B1 EP 0429808B1 EP 90119357 A EP90119357 A EP 90119357A EP 90119357 A EP90119357 A EP 90119357A EP 0429808 B1 EP0429808 B1 EP 0429808B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
tensioning
printing
printing plate
tensioning rail
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
EP90119357A
Other languages
German (de)
English (en)
Other versions
EP0429808A1 (fr
Inventor
Claus Simeth
Karl-Heinz Sellmann
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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT90119357T priority Critical patent/ATE97610T1/de
Publication of EP0429808A1 publication Critical patent/EP0429808A1/fr
Application granted granted Critical
Publication of EP0429808B1 publication Critical patent/EP0429808B1/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
    • B41F27/1231—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 tangential to support surface

Definitions

  • the invention relates to a device for precise positioning of a printing plate on a printing cylinder of a printing unit, wherein a pit extending in the axial direction of the cylinder is provided on the circumference of the printing cylinder for receiving clamping and fastening means for the printing plate, which is a front clamping rail for the start of printing the pressure plate and a in the direction of rotation of the printing cylinder located in front of the front clamping rail, rear clamping rail for the printing end of the printing plate, means for releasably attaching the ends of the printing plate to the two clamping rails are provided, furthermore means for adjusting the rear clamping rail in the circumferential direction of the Printing cylinders are provided over a larger clamping path for the purpose of clamping the printing plate on the cylinder circumference and means for adjusting the front clamping rail in the circumferential direction of the printing cylinder via a smaller adjustment path for adjusting the print image in d he machine are provided and the adjustment means for adjusting the pressure plate work together with a cylinder-
  • a first example is known from document DE-B-1786317.
  • DE-OS 38 43 395 Another example is DE-OS 38 43 395. It is common to this prior art that the stop defining the zero position of the front tensioning rail is the front pit wall.
  • Modern printing plates are made of a material that must not be stretched too much if it is not to lengthen excessively.
  • the operator therefore adjusts the front tensioning rail a certain distance from the zero position defined by the front pit wall and then tries several times until the correct zero position is found by correctly adjusting all tensioning screws of the front tensioning rail. It is obvious that this is not only labor-intensive, but in particular it is disadvantageous that the result does not always correspond to the desired result despite the large amount of work involved, especially since the zero position defined by the front pit wall had to be left and the The position of the front tensioning rail relative to the tensioning screws had to be changed several times, and this usually applies to all tensioning screws of the front tensioning rail.
  • the invention avoids these disadvantages. It is based on the object of proposing a device with the features mentioned at the outset, with which the zero position of the printing plate on the printing cylinder which defines the printed image can be achieved reproducibly and correctly in a few simple steps.
  • the invention is characterized in that the cylinder-fixed stop forming the zero position of the front tensioning rail is arranged on the side of the front tensioning rail facing the rear tensioning rail and in that spring means are provided which press the front tensioning rail against the stop.
  • the position of the front tensioning rail defining the start of printing (zero position) is thus defined by this, on the side facing away from the front pit wall, a cylinder-fixed stop.
  • the zero position defined in this way is safely reached with the aid of the spring means, which press the front tensioning rail against the cylinder-fixed stop in the defined zero position.
  • front pit wall cited above is the pit wall that is adjacent to the front tensioning rail. Seen in the direction of rotation of the printing cylinder, this is the rear pit wall.
  • the cylinder-fixed stop will be set correctly once and for all, and care must then be taken to ensure that the setting once found can no longer be easily shifted. It is therefore preferred if the cylinder-fixed stop is adjustable and can be blocked in the position once set.
  • a practical embodiment of this is characterized in that a stop screw is screwed into a threaded bore of a bar fixed in the cylinder in the pit, on the circumference of which a locking screw rests.
  • the tip of the stop screw thus forms the cylinder-fixed stop and the location of the stop once found (the tip of the stop screw) is blocked by a corresponding screwing in of the locking screw. This once found and blocked position can also be locked by suitable means.
  • stop and the spring are aligned coaxially with one another. There are then no forces acting on the front tensioning rail via the spring, which seek to tilt the tensioning rail.
  • An important embodiment is characterized in that at least one adjusting screw is provided, by means of which the distance between the front tensioning rail and the stop can be adjusted.
  • at least one adjusting screw is provided, by means of which the distance between the front tensioning rail and the stop can be adjusted.
  • two such set screws are provided for the front clamping rail of a cylinder, one at the front and one at the rear end of the clamping rail.
  • the actuation is further simplified if a device is provided via which all the adjusting screws of the cylinder can be actuated together. If, for example, two set screws are provided, they can be connected to one another via a rod, so that they can only be adjusted together. The set screws can also be adjusted using a common hand lever or each set screw is provided with such a hand lever.
  • the adjusting screws While in the prior art clamping screws are clamped in the front clamping bar, the adjusting screws provided in the present invention do not have the task of clamping the pressure plate. They are only intended to ensure that after the front tensioning rail with the attached pressure plate is hooked into the cylinder pit, it is at a distance from the cylinder-fixed stop. Then the set screws are loosened and the springs press the clamping bar against the cylinder-fixed stop and the desired zero position is then immediately adopted.
  • a schematic front view shows a section of a pressure cylinder 1 which rotates in the direction of arrow 2.
  • a cylinder pit 3 extends in the axial direction of the cylinder.
  • a front clamping bar 4 and a rear clamping bar 5 are accommodated in this.
  • the ends of a pressure plate 7 are detachably connected to the tensioning strips 4, 5 by means of suitable pins 6. The pins engage in corresponding holes in the end areas of the pressure plate.
  • Both clamping strips 4, 5 are in the circumferential direction, i.e. adjustable in the direction of the double arrow 8 to a certain extent, the rear tensioning bar can generally be adjusted by a larger span of a few millimeters and the front tensioning bar 4 by a smaller adjustment path of a few tenths of a millimeter. Both clamping bars 4,5 are held in the pit on suitable guides, which are not shown in the drawing.
  • Fig. 2 shows details of the inventive design of the front clamping bar 4 with associated components with which the zero position of the pressure plate 7 can be defined.
  • a bar 9 is fastened to the bottom of the cylinder pit 3, which is arranged on the side of the tensioning bar 4 facing away from the front pit wall 10.
  • a plurality of stop screws 11 are also screwed into the bar 9 at a distance from one another. See also Fig. 3, in which the stop screws are only indicated schematically.
  • the tips 12 of the screws 11 thus form a cylinder-fixed stop for the front clamping bar 4.
  • springs 13 These need not be designed as coil springs, as shown in the drawing, but other spring means are also possible.
  • set screws 14 are inserted into through holes in the clamping strips 4, the tips of which are screwed into threaded bores 15 of the cylinder.
  • the defined zero position of the front tensioning bar and with it also the pressure start of the Pressure plate 7 can be approached.
  • the set screws 14 are actuated so that they release the clamping bar 4 so that the springs 13 can move the clamping bar in the direction of the arrow 17 in FIG. 2 and bring it into contact with the screws 11.
  • the defined and once found zero position is now taken without any further activities.
  • Fig. 3 shows that you can get by for each clamping bar with two of the adjusting screws 14, which can also be operated together via a suitable device, not shown in the drawing.
  • the spring means 13 are expediently received in a suitable receptacle 19 of the tensioning rail or tensioning bar 4.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Claims (6)

  1. Dispositif pour tendre en position précise une planche d'impression (7) sur un cylindre d'impression (1) d'un groupe d'impression, une cavité (3) qui s'étend dans la direction axiale du cylindre (1) étant prévue à la périphérie du cylindre d'impression (1) et étant destinée à recevoir des moyens de mise en tension et de fixation pour la planche d'impression (7), qui comprennent une barre de tension avant (4) pour le début d'impression de la planche d'impression (7), et, devant la barre de tension avant (4) en se référant au sens de rotation du cylindre d'impression (1), une barre de tension arrière (5) pour la fin d'impression de la planche d'impression (7), des moyens (6) pour la fixation amovible des extrémités de la planche d'impression (7) étant prévus sur les deux barres de tension (4, 5), des moyens étant par ailleurs prévus pour déplacer la barre de tension arrière dans la direction périphérique (8) du cylindre d'impression (1), le long d'une course de tension relativement grande en vue de tendre la planche d'impression (7) sur la périphérie du cylindre, et des moyens étant prévus pour déplacer la barre de tension avant (4) dans la direction périphérique (8) du cylindre d'impression (1), le long d'une course d'ajustement relativement faible en vue d'ajuster l'image d'impression dans la machine, et les moyens de déplacement pour l'ajustement de la planche d'impression coopérant avec une butée fixe sur le cylindre, faisant office de position zéro,
       caractérisé
       en ce que la butée (12) fixe sur le cylindre et formant la position zéro de la barre de tension avant (4), est disposée au côté (16) de la barre de tension avant (4), dirigé vers la barre de tension arrière (5), et en ce que sont prévus des moyens formant ressort (13) qui appliquent la barre de tension avant (4) contre la butée (12).
  2. Dispositif selon la revendication 1, caractérisé en ce que la butée (12) fixe sur le cylindre est déplacable et peut être bloquée dans la position une fois réglée.
  3. Dispositif selon la revendication 2, caractérisé en ce que dans un alésage fileté d'une barrette (9) disposée de manière fixe sur le cylindre, dans la cavité (3), est vissée une vis de butée (11), contre la périphérie de laquelle s'appuie une vis de blocage (18).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la butée (12) et le ressort (13) sont alignés coaxialement l'un par rapport l'autre.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'est prévue au moins une vis de positionnement (14), par l'intermédiaire de laquelle il est possible de régler la distance entre la barre de tension avant (4) et la butée (12).
  6. Dispositif selon la revendication 5, caractérisé en ce qu'est prévu un dispositif par l'intermédiaire duquel il est possible d'actionner en commun toutes les vis de positionnement (14) du cylindre (1).
EP90119357A 1989-10-09 1990-10-09 Dispositif pour tendre avec un repérage exact une plaque d'impression sur un cylindre d'impression Expired - Lifetime EP0429808B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90119357T ATE97610T1 (de) 1989-10-09 1990-10-09 Vorrichtung zum positionsgenauen spannen einer druckplatte auf einem druckzylinder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933678A DE3933678A1 (de) 1989-10-09 1989-10-09 Vorrichtung zum positionsgenauen spannen einer druckplatte auf einem druckzylinder
DE3933678 1989-10-09

Publications (2)

Publication Number Publication Date
EP0429808A1 EP0429808A1 (fr) 1991-06-05
EP0429808B1 true EP0429808B1 (fr) 1993-11-24

Family

ID=6391111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119357A Expired - Lifetime EP0429808B1 (fr) 1989-10-09 1990-10-09 Dispositif pour tendre avec un repérage exact une plaque d'impression sur un cylindre d'impression

Country Status (7)

Country Link
US (1) US5259312A (fr)
EP (1) EP0429808B1 (fr)
JP (1) JPH04500050A (fr)
AT (1) ATE97610T1 (fr)
DE (2) DE3933678A1 (fr)
ES (1) ES2048924T3 (fr)
WO (1) WO1991004859A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205276A1 (de) * 1992-02-21 1993-08-26 Roland Man Druckmasch Vorrichtung zum aufspannen einer druckplatte auf einen plattenzylinder
DE4210897C1 (fr) * 1992-04-02 1993-08-12 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4240462C2 (de) * 1992-12-02 1994-09-22 Roland Man Druckmasch Vorrichtung zum registergenauen Aufspannen von Druckplatten auf dem Plattenzylinder von Druckmaschinen
DE4306139C2 (de) * 1993-02-27 1996-10-10 Heidelberger Druckmasch Ag Vorrichtung zur Durchführung von Arbeitsschritten in einem Zylinder einer Druckmaschine
DE4306237A1 (de) * 1993-02-27 1994-09-01 Heidelberger Druckmasch Ag Einrichtung zur Einstellung des Schrägregisters in einer Spanneinrichtung zum Einspannen von Druckplatten in einer Offsetdruckmaschine
US5553544A (en) * 1995-04-12 1996-09-10 Heidelberg Harns Inc. Plate cylinder
DE19613963C2 (de) * 1996-04-09 1999-03-04 Heidelberger Druckmasch Ag Vorrichtung zum Ablösen eines Bogens von einem Gummizylinder einer Druckmaschine

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1198377B (de) * 1961-10-21 1965-08-12 Maschf Augsburg Nuernberg Ag Einrichtung an einer Vorrichtung zum Befestigen biegsamer Druckplatten am Formzylinder von Rotationsdruckmaschinen
GB1195711A (en) * 1967-04-12 1970-06-24 Crabtree Mann Ltd Improvements in or relating to printing cylinders with printing plate clamping means thereon
DE1786317B1 (de) * 1968-01-15 1971-12-30 Register System Gmbh Vorrichtung zum befestigen und justieren von biegsa men druck platten an plattenzylindern von druckmaschinen
US3625151A (en) * 1969-07-07 1971-12-07 Baker Perkins Ltd Printing plate locking device
DE2105633A1 (de) * 1971-02-06 1972-08-10 Koenig & Bauer Schnellpressfab Plattenspannvorrichtung bei Stahlstichmaschinen
DE2225016C3 (de) * 1972-05-23 1976-01-29 Koenig & Bauer Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf formzylinder von rotationsdruckmaschinen
US3884147A (en) * 1972-05-26 1975-05-20 Roland Offsetmaschf Device for fastening flexible printing plates
US3946670A (en) * 1972-07-17 1976-03-30 Ball Corporation Apparatus for mounting and locking printing plates
DE2238852C3 (de) * 1972-08-07 1979-08-23 Register System Gmbh, 8000 Muenchen Vorrichtung zum Befestigen und Justieren von biegsamen Druckplatten an Plattenzylindern
DE2500282A1 (de) * 1975-01-04 1976-07-29 Karlheinz Ahlsdorf Vorrichtung zum einspannen von an ihren einspannraendern passlochungen aufweisenden druckplatten in offset-maschinen
US3994224A (en) * 1975-06-09 1976-11-30 Newspaper Equipment Company Mounting structure for printing plates
US4006686A (en) * 1975-09-18 1977-02-08 Ackerman Stephen P Blanket fastening means for a cylinder blanket
DE2556237C2 (de) * 1975-12-13 1986-05-28 Stahlecker, Fritz, 7347 Bad Überkingen Spinnmaschinenanlage mit mehreren Offenend-Spinnmaschinen und wenigstens einem Wartungsgerät
CH653616A5 (fr) * 1983-07-26 1986-01-15 De La Rue Giori Sa Procede de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques et dispositif de mise en oeuvre.
DE3443353A1 (de) * 1984-11-28 1986-06-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum spannen von druckplatten auf flexo- und offset-plattenzylindern
DE3510440A1 (de) * 1985-03-22 1986-09-25 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum einspannen und ausrichten von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
DE3866063D1 (de) * 1987-08-25 1991-12-12 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen.
DD269585A1 (de) * 1987-12-30 1989-07-05 Polygraph Leipzig Einrichtung zum lagegenauen schnellaufspannen von flexiblen druckplatten
DE3806526A1 (de) * 1988-03-01 1989-09-14 Heidelberger Druckmasch Ag Vorrichtung zum spannen von biegsamen druckplatten am plattenzylinder von rotationsdruckmaschinen
DE3936459C1 (fr) * 1989-11-02 1991-04-18 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Also Published As

Publication number Publication date
WO1991004859A1 (fr) 1991-04-18
DE3933678C2 (fr) 1991-08-14
ES2048924T3 (es) 1994-04-01
DE59003614D1 (de) 1994-01-05
EP0429808A1 (fr) 1991-06-05
ATE97610T1 (de) 1993-12-15
JPH04500050A (ja) 1992-01-09
US5259312A (en) 1993-11-09
DE3933678A1 (de) 1991-04-18

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