EP0607552B1 - Dispositif pour réduire les bombements de matière sur un manchon tubulaire d'impression - Google Patents

Dispositif pour réduire les bombements de matière sur un manchon tubulaire d'impression Download PDF

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Publication number
EP0607552B1
EP0607552B1 EP93119864A EP93119864A EP0607552B1 EP 0607552 B1 EP0607552 B1 EP 0607552B1 EP 93119864 A EP93119864 A EP 93119864A EP 93119864 A EP93119864 A EP 93119864A EP 0607552 B1 EP0607552 B1 EP 0607552B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
circumferential surface
printing sleeve
multiplicity
medium
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
EP93119864A
Other languages
German (de)
English (en)
Other versions
EP0607552A2 (fr
EP0607552A3 (fr
Inventor
Douglas Joseph Dawley
James B. Vrotacoe
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 EP0607552A2 publication Critical patent/EP0607552A2/fr
Publication of EP0607552A3 publication Critical patent/EP0607552A3/fr
Application granted granted Critical
Publication of EP0607552B1 publication Critical patent/EP0607552B1/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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/193—Transfer cylinders; Offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • 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
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • the present invention relates to Offset printing machines and in particular on a device for the reduction of material bulges on one gap-free, tubular pressure sleeve on a cylinder is assembled.
  • print images are made of printing plates, which are mounted on plate cylinders, by Transfer cylinder, known as a blanket cylinder, on a transferring moving material web.
  • Transfer cylinder known as a blanket cylinder
  • Blankets mounted on those blanket cylinders which a rubber surface for the transfer of printed images exhibit.
  • Conventional printing plates and blankets are Rectangular in shape and are arranged in axial columns along the circumferential surface of the corresponding Extend plate and blanket cylinder, assembled.
  • a number of other problems are to be combined with this design, so that the quality of the final printed product is adversely affected.
  • FR-A-2 192 914 shows a printing plate or blanket, which is caused by constant suction air Cylinder is held on the peripheral surface.
  • the opposite ends of the printing blanket or the printing plate form a gap, creating an interrupted Surface results, which at high Rotation speeds can lead to vibrations.
  • US-A-4,144,813 discloses sleeves which are designed for mounting on one conical core using compressed air be expanded.
  • DE-U-85 32 300 shows a roller tube for printing presses an exchangeable casing tube. To build a the elevator of the casing tube with undersize enabling air pressure Before mounting it, a mounting tube on the roller tube postponed.
  • a tubular To assemble printing form or a tubular rubber blanket at one end of a corresponding cylinder Air duct is provided on which the sleeve is mounted should.
  • the channel delivers through a variety of passages Compressed air radially outwards. While the pressure sleeve over the Is placed in passages, the outflowing compressed air expands the pressure sleeve radially and thus enables the Pressure sleeve on the circumferential surface of the corresponding cylinder is mounted axially.
  • This arrangement contains the problem that at the contact point the pressure sleeve and the corresponding cylinder air is included. Generated while the press is running this trapped air is a continuous propulsive wave that precedes the pressure zone between the correspond to cylinders and an adjacent cylinder presses the gap and thus bulges the pressure sleeve causes. This phenomenon is known as pressure sleeve bead. It is caused by defects in the duplication Printed product.
  • An object of the present invention is that Device which causes bulges of material Waves of a medium removed to provide.
  • the present invention includes the device for connecting the contact surface of the cylinder and the pressure sleeve with a low pressure area the pressure sleeve with at least one groove that runs along whose inner circumferential surface expands through which the enclosed wave of a medium flows out.
  • the present invention includes the device for connecting the contact surface of the cylinder and the pressure sleeve with a low pressure area a variety of small, granular particles between which Gaps are formed through which the enclosed Wave of a medium flows out.
  • An advantage of the present invention is that the included wave that causes the bulge Medium is removed without affecting the quality of the final Printed product is reduced.
  • Another advantage of the present invention is that Doubling is eliminated and thus the overall quality of the final printed product is improved.
  • Another advantage of the present invention is that this traps the enclosed wave of a medium can remove several revolutions of the cylinder, so that after Assembling the printing sleeve the printing activity almost immediately can continue.
  • Fig. 1 shows a web material 10, which by a Passes gap 12 between a blanket cylinder 14, on which a gap-free, tubular rubber blanket 16 is mounted and an impression cylinder 18 in an offset Printing press. It should be understood that the printing cylinder 18th by another with a rubber blanket Blanket cylinder can be replaced to either side to be able to print the web material 10.
  • the rubber blanket 16 transfers print images from a tubular printing form 20, which is mounted on a printing form cylinder 22, on the Web material 10.
  • A also forms in the printing form 20 Bulge 30. This is caused by a wave of a Medium 31, which is in front of the gap 28 between the Blanket cylinder 14 and the printing form cylinder 22nd moving forward, caused.
  • the waves of one Medium 25, 27 and 31 are created by air, which, during the blanket 16 is mounted on the blanket cylinder 14, is included, or while the printing form 20 on the Printing form cylinder 22 is mounted. This included Compressed air creates bulges 24, 26, and 30 in front of the Columns 28 and 12.
  • the shaft of the media 25 continuously moves forward around the blanket cylinder 14, causing the blanket 16 to move relative to the blanket cylinder with each revolution. This movement causes the image transferred to the blanket 16 to be in a different position with each revolution relative to the printing form 20.
  • the distance between any given image transferred to the blanket 16 and the latent image of a previous revolution that has been embossed on the blanket causes two images to be printed on the web material 10, that is , doubling takes place. This duplication is an undesirable printing error.
  • the 27 and 31 have similar effects.
  • the present invention relates to a device for Removal of the waves of a medium directed which the Generate bulges in the blanket 16 and the printing form 20.
  • the mentioned invention sees a way before that along the advancing waves of a Medium (trapped air) from below the pressure sleeve, d. i.e., the blanket 16 or the printing form 20, flow out can.
  • a Medium trapped air
  • the system which constitutes the present invention to Remove any media from the enclosed media Geometry can be applied, which enables the Medium from a contact surface of the pressure sleeve and its corresponding cylinder, d. H. from the blanket cylinder 14 or from the printing form cylinder 22 to an area with a lower pressure than the hydrodynamic pressure in the Waves of the medium can escape.
  • Fig. 3 represents is such a device that a cylinder 40 with a Has groove 50, which extends over the circumferential Extends surface of the cylinder.
  • the groove 50 connects the contact point of the cylinder 40 and one thereon assembled pressure sleeve (not shown) with a Air duct 60.
  • the air duct 60 delivers compressed air through the Passages 65 to radially expand the pressure sleeve so that this can be mounted on the cylinder 40. While the Printing machine is running, the air duct 60 can, however Ventilate the atmosphere so that the waves of the medium flow out through the grooves 50 into a low pressure region can.
  • Fig. 4 shows a related embodiment, wherein a Cylinder 70 is provided which has a groove 80 which spiral around the circumferential surface of the Rubber blanket cylinder around and across it.
  • Figures 3 and 4 are single straight and one single spiral groove can show many such Grooves that can be connected to each other or also not be provided.
  • the present invention is also not limited to these configurations.
  • the Grooves 50 and 80 can be any type of geometric Configuration and any type of cross-section.
  • a cylinder 90 is a plurality of has separate holes 100 that have a contact point of the cylinder 90 and a pressure sleeve 105 mounted thereon (shown in Fig. 6) connect to a low pressure area.
  • FIG. 6 shows the plurality of holes 100 formed by the circumferential surface of the cylinder 90 in a channel 110, which opens into the air duct (not shown), lead and which, while the printing press is running, to the atmosphere ventilated, as in the embodiments of Figures 3 and 4 is shown.
  • This embodiment is not based on that Arrangement limited, which shown in Figures 5 and 6 becomes. Almost any arrangement of holes can be used and the holes can be any kind of geometric Have configuration.
  • This embodiment provides a cylinder which has a rough circumferential Surface with one of Maxima 130 and Minima 140 has a certain contour.
  • the Maxima 130 and Minima 140 can be made from a variety of cords or roughened be shaped.
  • the Minima 140 connect the contact point of the Cylinder 120 and a pressure sleeve 150 mounted thereon an area which has a lower pressure than that of the advancing wave of a medium.
  • the Pressure sleeve 150 rides on the Maxima 130 and enables thus the escape of the enclosed waves Medium about the Minima 140.
  • a tubular, gap-free pressure sleeve 200 mounted on a cylinder 210 intended.
  • the pressure sleeve 200 has a groove 220, which extend along their inner circumferential surface expands.
  • the groove 220 connects the contact surface of the Pressure sleeve 200 and the cylinder 210 with a Low pressure area and provides a path along which the enclosed waves of a medium can escape.
  • the groove 220 can be any type of geometric Configuration and any type of cross-section. It can also have a variety of such grooves that may or may not be connected to each other, be provided.
  • the inner circumferential surface of the Pressure sleeve 200 can also have a rough contour, which is determined by maxima and minima, and in which the enclosed waves of the medium through the minima escape.
  • FIG. 9 shows yet another embodiment of the present invention, wherein a tubular gapless pressure sleeve 250 mounted on a cylinder 260 is provided.
  • a foreign substance ie small, granular particles 270, such as. B. talc, introduced at the contact point of the pressure sleeve 250 and the cylinder 260.
  • the pressure sleeve 250 rests on the small, granular particles 270, which enables the enclosed medium to flow into a low-pressure region via the spaces 280 formed between the particles.
  • the small granular particles 270 can have any type of geometric configuration, so that the spaces 280 formed between the particles allow the enclosed medium to flow into a low pressure region.
  • the area in which the included Medium flows either the atmosphere, a created one Vacuum or any other area that could be one has lower pressure than the pressure going forward moving waves of a medium.

Landscapes

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

Claims (29)

  1. Dispositif destiné à réduire les bombements de matière (24, 26) sur un manchon d'impression (16, 20) tubulaire et sans fente dans une presse offset, les bombements de matière (24, 26) étant Provoqués par au moins une onde (25, 27) d'un fluide se déplaçant vers l'avant et exerçant une pression déterminée, sur un cylindre (14, 22) qui est conçu de façon à loger pour le montage, le manchon d'impression (16, 20) sur sa surface périphérique, caractérisé en ce qu'un dispositif (50, 80, 100 ; 130, 140 ; 220, 270) s'étendant sur la largeur du cylindre (14, 22, 40, 70, 90, 120, 210, 260) est prévu pour assembler un point de contact du cylindre (14, 22, 40, 70, 90, 120, 210, 260) et du manchon d'impression (16, 20, 105, 200, 250) avec une zone qui présente une pression plus basse que celle de l'onde (25, 27) du fluide afin de permettre un écoulement dans la zone à basse pression, de l'onde (25, 27) du fluide qui est bloquée contre le point de contact et se déplace vers l'avant, avant la fente entre le cylindre (14, 22, 40, 70, 90, 120, 210, 260) et un cylindre (18, 22) adjacent.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le cylindre (14, 22, 40, 70, 90, 120, 210, 260) qui présente au moins une gorge ((50) qui s'étend le long de sa surface périphérique et par laquelle s'écoute l'onde (25, 27) bloquée d'un fluide.
  3. Dispositif selon la revendication 1, caractérisé en ce qu'au moins une gorge (50) s'étend transversalement sur la surface périphérique du cylindre (40).
  4. Dispositif selon la revendication 2, caractérisé en ce qu'au moins une gorge (80) s'étend en spirale tout autour de la surface périphérique du cylindre (70) et au-delà de la surface périphérique du cylindre (70).
  5. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le cylindre (40, 70) avec plusieurs gorges (50, 80) qui s'étendent le long de sa surface périphérique et par lesquelles s'écoute l'onde (25, 27) bloquée d'un fluide.
  6. Dispositif selon la revendication 5, caractérisé en ce que les gorges (50, 80) sont indépendantes l'une de l'autre.
  7. Dispositif selon la revendication 5, caractérisé en ce que les gorges (50, 80) sont assemblées entre elles.
  8. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le cylindre (90) qui est muni de plusieurs trous (100) par lesquels s'écoule l'onde (25, 27) bloquée d'un fluide.
  9. Dispositif selon la revendication 8, caractérisé en ce que les trous (100) conduisent de la surface de contact du cylindre (90) et du manchon d'impression (105) à un conduit (110).
  10. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le cylindre (120) qui présente une surface périphérique avec un contour rugueux qui est déterminé par des maxima (130) et des minima (140), en ce que le manchon d'impression (150) repose sur les maxima (130) et en ce que l'onde bloquée (25, 27) d'un fluide s'écoule par les minima (140).
  11. Dispositif selon la revendication 10, caractérisé en ce que les maxima (130) et minima (140) qui déterminent le contour rugueux de la surface périphérique du cylindre (120), sont formés de plusieurs moletages ou rugosités.
  12. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le manchon d'impression (210) avec au moins une gorge (220) qui s'étend le long de sa surface périphérique intérieure et par laquelle s'écoule l'onde (25, 27) bloquée d'un fluide.
  13. Dispositif selon la revendication 12, caractérisé en ce qu'au moins une gorge (220) s'étend transversalement sur la surface périphérique intérieure du manchon d'impression.
  14. Dispositif selon la revendication 12, caractérisé en ce qu'au moins une gorge (80) s'étend en spirale tout autour de la surface périphérique intérieure du manchon d'impression et au-delà de cette surface.
  15. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le manchon d'impression (200) qui présente plusieurs gorges (50, 80, 220) qui s'étendent le long de la surface périphérique interne du manchon d'impression (200) et par lesquelles s'écoule l'onde (25, 27) bloquée d'un fluide.
  16. Dispositif selon la revendication 15, caractérisé en ce que les gorges (50, 80, 220) sont indépendantes l'une de l'autre.
  17. Dispositif selon la revendication 15, caractérisé en ce que les gorges (50, 80, 220) sont assemblées entre elles.
  18. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend le manchon d'impression (150) qui présente une surface périphérique intérieure avec un contour rugueux qui est déterminé par des maxima (130) et des minima (140) et par les creux desquels s'écoule l'onde (25, 27) bloquée d'un fluide.
  19. Dispositif selon la revendication 18, caractérisé en ce que les maxima (140) et les minima (130) qui déterminent le contour rugueux de la surface périphérique intérieure du manchon d'impression (150), sont formés de plusieurs moletages ou rugosités.
  20. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'assemblage (50, 80, 100 ; 130, 140 ; 220, 270) comprend plusieurs petites particules (270) granulaires qui présentent des interstices (280) par lesquels s'écoule l'onde (25, 27) bloquée d'un fluide.
  21. Dispositif selon la revendication 20, caractérisé en ce que les petites particules (270) granulaires sont du talc.
  22. Dispositif selon la revendication 1, caractérisé en ce que le manchon d'impression (16, 20, 105, 150, 200, 250) est une forme d'impression tubulaire.
  23. Dispositif selon la revendication 1, caractérisé en ce que le manchon d'impression (16, 20, 105, 150, 200, 250) est un blanchet tubulaire.
  24. Dispositif selon la revendication 1, caractérisé en ce que la zone à basse pression est l'atmosphère.
  25. Dispositif selon la revendication 1, caractérisé en ce que la zone à basse pression est un vide créé.
  26. Dispositif selon la revendication 1, caractérisé en ce que la zone à basse pression est un conduit de ventilation (60, 65) placé sur le cylindre (40, 70, 90) qui amène l'air comprimé radialement vers l'extérieur pour étendre le manchon d'impression (16, 20, 105, 150, 200, 250) tandis que ce dernier est monté sur le cylindre (40, 70, 90) et qui(conduit de ventilation) ventile vers l'atmosphère pendant le fonctionnement normal de la machine à imprimer.
  27. Dispositif selon la revendication 1, caractérisé en ce que le cylindre adjacent (22) est un cylindre de la forme d'impression.
  28. Dispositif selon la revendication 1, caractérisé en ce que le cylindre adjacent (18) est un cylindre d'impression.
  29. Dispositif selon la revendication 1, caractérisé en ce que le cylindre adjacent (14) est un cylindre porte-blanchet.
EP93119864A 1993-01-22 1993-12-09 Dispositif pour réduire les bombements de matière sur un manchon tubulaire d'impression Expired - Lifetime EP0607552B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US745393A 1993-01-22 1993-01-22
US7453 1993-01-22

Publications (3)

Publication Number Publication Date
EP0607552A2 EP0607552A2 (fr) 1994-07-27
EP0607552A3 EP0607552A3 (fr) 1995-05-03
EP0607552B1 true EP0607552B1 (fr) 1998-03-11

Family

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EP93119864A Expired - Lifetime EP0607552B1 (fr) 1993-01-22 1993-12-09 Dispositif pour réduire les bombements de matière sur un manchon tubulaire d'impression

Country Status (4)

Country Link
US (1) US6205923B1 (fr)
EP (1) EP0607552B1 (fr)
JP (1) JP3370167B2 (fr)
DE (2) DE4341262C2 (fr)

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AU2003250783A1 (en) * 2002-07-19 2004-03-03 Koenig And Bauer Aktiengesellschaft Method and device for reducing vibrations on rotating parts, and vibration-damped rotating part
DE502005009727D1 (de) * 2005-07-18 2010-07-22 Hueck Folien Gmbh Druckzylinder mit abnehmbarer Prägeform
DE102006010551A1 (de) * 2006-03-07 2007-09-13 Maschinenfabrik Wifag Entlastungselement
DE102006014968A1 (de) * 2006-03-31 2007-10-04 Man Roland Druckmaschinen Ag Rotationskörper einer Rollendruckmaschine
JP5230932B2 (ja) * 2006-12-27 2013-07-10 三菱重工印刷紙工機械株式会社 印刷胴用スリーブ、印刷機及び印刷胴用スリーブの内周層着脱方法
JP2009285861A (ja) * 2008-05-27 2009-12-10 Masayuki Izume 印刷機用版および印刷機
US8307764B2 (en) * 2009-02-17 2012-11-13 Luminite Products Corporation Printing sleeve
DE102014101432B3 (de) * 2014-02-05 2014-12-24 CONPRINTA GmbH & Co. KG Druckwerk für eine Flexodruckmaschine
NL2035249B1 (en) * 2023-07-03 2025-01-10 Xsys Germany Gmbh Method for installing a printing plate on a sleeve, the sleeve and assemblies for printing with the printing plate

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Also Published As

Publication number Publication date
JPH071716A (ja) 1995-01-06
EP0607552A2 (fr) 1994-07-27
EP0607552A3 (fr) 1995-05-03
DE4341262C2 (de) 1999-04-08
JP3370167B2 (ja) 2003-01-27
US6205923B1 (en) 2001-03-27
DE59308252D1 (de) 1998-04-16
DE4341262A1 (de) 1994-07-28

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