EP0010122B1 - Dispositif pour tendre le blanchet sur le cylindre de report d'une machine à imprimer rotative - Google Patents

Dispositif pour tendre le blanchet sur le cylindre de report d'une machine à imprimer rotative Download PDF

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Publication number
EP0010122B1
EP0010122B1 EP79102339A EP79102339A EP0010122B1 EP 0010122 B1 EP0010122 B1 EP 0010122B1 EP 79102339 A EP79102339 A EP 79102339A EP 79102339 A EP79102339 A EP 79102339A EP 0010122 B1 EP0010122 B1 EP 0010122B1
Authority
EP
European Patent Office
Prior art keywords
blanket
cylinder
pulling
tight
clamping
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
Application number
EP79102339A
Other languages
German (de)
English (en)
Other versions
EP0010122A3 (en
EP0010122A2 (fr
Inventor
Willi Jeschke
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6050573&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0010122(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to AT79102339T priority Critical patent/ATE477T1/de
Publication of EP0010122A2 publication Critical patent/EP0010122A2/fr
Publication of EP0010122A3 publication Critical patent/EP0010122A3/xx
Application granted granted Critical
Publication of EP0010122B1 publication Critical patent/EP0010122B1/fr
Expired 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
    • B41F27/125—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 on a curvilinear path, e.g. by winding on a roll
    • 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 device for tensioning the blanket on the blanket cylinder of rotary printing presses, the outer surface of which has a slot running parallel to the cylinder axis, which widens inwards and accommodates two rotatable tensioning spindles for tensioning the blanket, each provided with a longitudinal groove for inserting the blanket ends are, the two ends of the blanket have reinforcements.
  • the rubber blanket ends are provided with reinforcements which protrude beyond the rubber blanket on both sides.
  • the protruding ends of the reinforcements are held on both sides by bushes after insertion into the slots of the clamping spindle. Only then can the tensioning spindles be turned to tension the blanket ends.
  • the above reinforcements have the disadvantage that they can interfere with the handling of the rubber blankets outside of the machine, that they are exposed to excessive stresses when the rubber blanket ends are tensioned, so that the armatures bend and there is also the risk that the bushings hold the Reinforcements jam, so that changing the rubber blankets is difficult.
  • Another known device for tensioning the rubber blanket does not use reinforcements on the rubber blanket ends and therefore requires tilting strips in the tensioning spindles, which are held in place by springs.
  • the known design has the further disadvantage that the rubber blanket ends can be inserted very difficult into the narrow slots between the tilt bar and tension spindle. If the ends are inserted unevenly, a different tension is generated over the length of the rubber blanket, which has a negative effect on the printed image.
  • inserting the rubber blanket ends through the narrow slot in the cylinder jacket is very time-consuming and thus hinders the quick replacement of a rubber blanket.
  • the object of the invention is to provide a device for tensioning the rubber blanket which, using simple means, enables a uniform and secure tensioning of both rubber blanket ends and a simple and quick change of the rubber blanket.
  • a support spindle is arranged in parallel and at such a small distance from the clamping spindles that the latter during the clamping process the parts of the reinforcements adjacent Angled rubber blanket, thereby fully pressing the reinforcements into the longitudinal groove and then preventing them from sliding out.
  • the support spindle arranged above the tensioning spindles is uncomplicated and enables both rubber blanket ends to be inserted quickly and easily.
  • the support spindle also ensures a secure and even tensioning of the rubber blanket, because the two ends cannot slip out of the slots of the tensioning spindles due to the angling and are guided along their entire length.
  • the support spindle can z. B. have a circular cross-section, the cross-section can be designed as a triangle with rounded corners and it could also have the shape of an angle with an outwardly pointing angle tip and rounded leg ends. After the two ends of the rubber blanket are supported on the support spindle in the tensioned state, a relatively small cross section can be selected for this.
  • the support spindle has a circular cross-section with a smaller diameter than the clamping spindles and is freely rotatably mounted in bearings on both ends of the cylinder in bridges.
  • the support spindle can rotate when the blanket ends are tensioned and enables the blanket to be changed quickly and easily. It can also be made relatively thin because it is supported on both sides by the stretched blanket ends.
  • the support spindle is arranged symmetrically to the clamping spindles and has a larger diameter than the space between the clamping spindles. This achieves an optimal tension of the two blanket ends.
  • a rubber blanket 2 is stretched onto the rubber cylinder 1 in a known manner Ends 3, 4 are inserted through a slot 5 in the outer surface of the blanket cylinder.
  • the slot 5 widens inwards and accommodates two clamping spindles 6, 7.
  • Each tensioning spindle 6, 7 is provided with a longitudinal groove 8 into which the rubber blanket ends are inserted.
  • the ends 3, 4 of the rubber blanket 2 are provided with reinforcements 9.
  • a support spindle 10 is provided in the expanded space between the outer surface of the blanket cylinder 1 and the two clamping spindles 6, 7 in parallel and at a short distance from both, which can rotate freely in bearings 11 on both Cylinder end faces is stored.
  • the support spindle 10 is arranged symmetrically to the clamping spindles and has a smaller diameter than these. However, the diameter is larger than the distance between the clamping spindles.
  • Fig. 1 the end 4 of the blanket 2 is already inserted into the longitudinal groove 8 of the clamping spindle 7 and this is rotated somewhat counterclockwise, so that the protruding end 4 is supported on the clamping spindle 10 and angled. As a result, the reinforcement 9 is pressed into the longitudinal groove 8 and cannot slide out.
  • the other end 3 of the rubber blanket 2 is inserted into the groove 8 of the clamping spindle 6, which is in the starting position for inserting the rubber blanket end.
  • FIG. 2 shows the tensioned state of the rubber blanket 2 again, in which both clamping spindles 6 and 7 are rotated with the two ends 3, 4 of the rubber blanket 2 so far that the rubber blanket 2 is firmly clamped on the outer surface of the rubber cylinder 1 is.
  • the support spindle 10 can rotate when tensioning the rubber blanket and prevents the ends 3, 4 of the rubber blanket from slipping out, so that these are securely stretched over their entire length. Due to the small diameter of the support spindle 10, the two blanket ends can be easily inserted. In the tensioned state of the rubber blanket 2, the two rubber blanket ends rest against the support spindle 10 on both sides, so that the latter cannot bend.
  • Fig. 3 it is shown that the support spindle 10 is rotatably mounted with its pin 12 in the bearing 11.
  • the clamping spindles 6 are also rotatably mounted with their pins 13, 14, the mounting being carried out in a bridge 18 fastened to the plate cylinder 1.
  • the clamping spindle 7 can be rotated via a worm 15 and a worm wheel 16.
  • the worm and the worm wheel are arranged on the opposite side of the cylinder, not shown.
  • FIG. 4 differs from FIGS. 1 and 2 in that instead of a support spindle 10 with a circular cross section, a support spindle 10 'with an approximately triangular cross section was chosen.
  • the support spindle 10 ' is not rotatably mounted in the bridges 18 and also enables a uniform and secure tensioning and a simple change of the rubber blanket.
  • FIG. 5 shows instead of a support spindle 10 on the inside of the bridge 18 in the area of the rubber blanket 2 arranged support bolts 19 which are rotatably or rigidly mounted in the bridges 18. This enables a safe and uniform tensioning of the rubber blanket 2 to be achieved, particularly in the case of narrow machines.
  • the support spindle 17 is conical with the smaller diameter on the side of the worm wheels 16, both of which are provided on the same side in the exemplary embodiment shown.
  • an angular rotation of the tensioning spindles 6, 7 can be compensated for with a conical support spindle, so that a uniform tension is achieved over the entire width of the rubber blanket.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)

Claims (6)

1. Dispositif pour tendre le blanchet sur le cylindre de report d'une machine à imprimer rotative, dont la surface latérale comporte une fente dirigée parallèlement à l'axe du cylindre, qui s'élargit vers l'intérieur et qui contient deux broches de tension pouvant tourner, destinées à tendre le blanchet, et qui sont prévues avec une rainure longitudinale pour recevoir les extrémités du blanchet, les extrémités du blanchet comportant des armatures, dispositif caractérisé en ce que, dans l'espace élargi de la fente (5), entre la surface latérale du cylindre de report (1) et les deux broches de tension (6,7) est disposée une broche d'appui (10) parallèlement aux broches de tension (6, 7) et à une distance suffisamment courte de ces dernières pour qu'au cours d'une opération de tension, les parties du blanchet (2) limitrophes des armatures (9) soient inclinées et qu'ainsi, les armatures (9) soient d'abord entièrement comprimées dans les rainures longitudinales (8), et ne puissent ensuite glisser vers l'extérieur.
2. Dispositif selon la revendication 1, caractérisé en ce que la broche d'appui (10) a une section transversale circulaire, avec un diamètre inférieur à celui des broches de tension (6, 7) et est supportée de manière à pouvoir tourner librement dans des logements (11) ménagés dans des pontets (18) sur les deux faces frontales du cylindre.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la broche d'appui (10) est disposée symétriquement par rapport aux broches de tension (6, 7), et, en ce que son diamètre est supérieur à l'espace entre les broches de tension (6,7).
4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que sur la largeur du blanchet (2) la broche d'appui (10') a la forme d'un triangle ou d'une cornière, et est supportée dans les pontets (18) de manière à ne pas pouvoir tourner.
5. Dispositif selon la revendication 1 ou 2, caractérisé en ce que des chevilles d'appui (19) sont disposées sur les deux bouts du cylindre dans la région du blanchet (2) à la place de la broche d'appui (10).
6. Dispositif selon la revendication 1 ou 2, caractérisé en ce que, sur la largeur du blanchet (2), la broche d'appui (17) est réalisée conique, avec son plus petit diamètre sur le côté des pignons (16) à vis sans fin, accouplés aux broches de tension (6,7) pour les faire tourner.
EP79102339A 1978-09-27 1979-07-09 Dispositif pour tendre le blanchet sur le cylindre de report d'une machine à imprimer rotative Expired EP0010122B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102339T ATE477T1 (de) 1978-09-27 1979-07-09 Vorrichtung zum spannen des gummituches auf dem gummizylinder von rotationsdruckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2842000 1978-09-27
DE2842000A DE2842000C3 (de) 1978-09-27 1978-09-27 Vorrichtung zum Spannen des Gummituches auf dem Gummizylinder von Rotationsdruckmaschinen

Publications (3)

Publication Number Publication Date
EP0010122A2 EP0010122A2 (fr) 1980-04-30
EP0010122A3 EP0010122A3 (en) 1980-07-09
EP0010122B1 true EP0010122B1 (fr) 1981-12-16

Family

ID=6050573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102339A Expired EP0010122B1 (fr) 1978-09-27 1979-07-09 Dispositif pour tendre le blanchet sur le cylindre de report d'une machine à imprimer rotative

Country Status (5)

Country Link
US (1) US4261262A (fr)
EP (1) EP0010122B1 (fr)
JP (1) JPS5937228B2 (fr)
AT (1) ATE477T1 (fr)
DE (1) DE2842000C3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858545U (ja) * 1981-10-16 1983-04-20 株式会社東京機械製作所 印刷機におけるブランケツト緊張装置
DE3338450C1 (de) * 1983-10-22 1985-06-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Einrichtung zum Einfuehren der Endabschnitte eines flexiblen Aufzuges in eine Grube eines Zylinders einer Druckmaschine
US4577560A (en) * 1984-08-20 1986-03-25 R. R. Donnelley & Sons Company Gapless lock-up for offset printing cylinders
US4829896A (en) * 1987-05-18 1989-05-16 W. R. Grace & Co. Apparatus for attaching a printing blanket to a printing cylinder
JP3069098B1 (ja) * 1999-09-22 2000-07-24 株式会社東京機械製作所 印刷機のブランケット装着装置及びブランケット

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7148001U (de) * 1900-01-01 Maschinenfabrik Augsburg Nuernberg Ag Einrichtung zum Befestigen des Gummituches bzw. einer Druckplatte auf dem Gummioder Plattenzylinder einer Rotationsoffsetdruckmaschine
DE388029C (de) * 1921-10-23 1924-01-08 Vogtlaendische Maschinenfabrik Aufspannvorrichtung fuer biegsame Druckplatten an Gummidruckrotationsmaschinen
US2627230A (en) * 1945-05-26 1953-02-03 Hoe & Co R Blanket tensioning means
US2727463A (en) * 1952-01-21 1955-12-20 Tingue Brown & Co Blanketing of printing press impression cylinders
US2850970A (en) * 1955-04-22 1958-09-09 Levey Fred K H Co Inc Lock-up
DE1124051B (de) * 1955-04-22 1962-02-22 Fred K H Levey Company Inc Vorrichtung zum Befestigen des Gummituches auf dem Gummizylinder
GB918673A (en) * 1960-03-08 1963-02-13 Vickers Armstrongs Ltd Improvements in or relating to blanket tensioning means for the impression cylindersof rotary printing presses
FR1367860A (fr) * 1963-08-13 1964-07-24 Crabtree & Sons Ltd R Perfectionnement aux machines à imprimer rotatives
DE1239706B (de) * 1963-08-27 1967-05-03 Winkler Fallert & Co Maschf Vorrichtung zum Spannen des Gummituches auf dem Gummizylinder
JPS4930241U (fr) * 1972-06-14 1974-03-15
DE2606223A1 (de) * 1976-02-17 1977-08-18 Maschf Augsburg Nuernberg Ag Vorrichtung zum spannen des gummituches einer offsetdruckmaschine

Also Published As

Publication number Publication date
EP0010122A3 (en) 1980-07-09
DE2842000A1 (de) 1980-04-10
DE2842000C3 (de) 1984-08-30
ATE477T1 (de) 1982-01-15
US4261262A (en) 1981-04-14
DE2842000B2 (de) 1981-01-15
JPS5546978A (en) 1980-04-02
EP0010122A2 (fr) 1980-04-30
JPS5937228B2 (ja) 1984-09-08

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