EP0607552A2 - 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
EP0607552A2
EP0607552A2 EP93119864A EP93119864A EP0607552A2 EP 0607552 A2 EP0607552 A2 EP 0607552A2 EP 93119864 A EP93119864 A EP 93119864A EP 93119864 A EP93119864 A EP 93119864A EP 0607552 A2 EP0607552 A2 EP 0607552A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
pressure
pressure sleeve
circumferential surface
sleeve
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
EP93119864A
Other languages
German (de)
English (en)
Other versions
EP0607552A3 (fr
EP0607552B1 (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, more particularly, to an apparatus for reducing bulges on a gap-free tubular printing sleeve mounted on a cylinder.
  • print images of printing plates which are mounted on plate cylinders are transferred to a moving material web by transfer cylinders, known as blanket cylinders.
  • blankets are mounted on those blanket cylinders which have a rubber surface for the transfer of printed images.
  • Conventional printing plates and blankets are rectangular in shape and are mounted in axial gaps that extend along the circumferential surface of the corresponding blanket and blanket cylinder.
  • One problem with this design is that at high speeds the gaps in the plate and blanket cylinders within the press produce vibrations which have the effect of varying the optical density of the printed image.
  • a number of other problems are associated with this design so that the quality of the final printed product is adversely affected.
  • an air duct is provided at one end of a corresponding cylinder, on which the sleeve is to be mounted.
  • the duct delivers compressed air radially outwards through a large number of passages.
  • the outflowing compressed air expands the pressure sleeve radially, thus allowing the pressure sleeve to be axially mounted on the circumferential surface of the corresponding cylinder.
  • the pressure sleeve Since the inner circumference of the pressure sleeve is slightly narrower than the outer circumference of the corresponding cylinder, the pressure sleeve, after it has been assembled, is tensioned by the corresponding cylinder in order to produce a tight pressure ratio between the pressure sleeve and the corresponding cylinder. This pressure ratio permanently fixes the printing sleeve on the corresponding cylinder, so that there is no relative movement between them during the actuation of the printing press.
  • This arrangement contains the problem that air is trapped at the contact point of the pressure sleeve and the corresponding cylinder. While the printing press is running, this trapped air creates a continuously advancing shaft which presses against the gap in front of the printing zone between the corresponding cylinder and an adjacent cylinder and thus causes the printing sleeve to bulge out. This phenomenon is known as pressure sleeve bead. It causes defects in the printed product due to duplication.
  • An object of the present invention is to provide a device which removes waves of a medium which cause material bulges.
  • the present invention provides a device for reducing bulges of material on a gap-free, tubular printing sleeve in an offset printing machine, which is provided by at least one propelling shaft a medium which has a certain pressure, which comprises: A cylinder that is adapted for mounting the pressure sleeve on its circumferential surface; and a device for connecting a contact surface of the cylinder and the pressure sleeve with a pressurized area, in which the pressure is less than the pressure in the shaft of the medium, making it the one enclosed at the contact surface, in front of the gap between the cylinder and the adjacent one Cylinder advancing shaft of the medium is allowed to flow into the low pressure area.
  • the device for connecting the contact surface of the cylinder and the pressure sleeve with a low-pressure region comprises the cylinder with at least one groove which extends along its circumferential surface and through which the enclosed shaft of the medium flows.
  • the means for connecting the contact surface of the cylinder and the pressure sleeve to a low pressure region comprises the pressure sleeve having at least one groove which extends along the inner circumferential surface thereof through which the enclosed wave of a medium flows.
  • the device for connecting the contact surface of the cylinder and the pressure sleeve to a low-pressure region comprises a multiplicity of small, granular particles, between which interspaces are formed, through which the enclosed shaft of a medium flows.
  • An advantage of the present invention is that the included bulge wave of a medium is removed without reducing the quality of the final printed product.
  • Another advantage of the present invention is that duplication is eliminated, thus improving the overall quality of the final printed product.
  • Another advantage of the present invention is that it can remove the enclosed shaft of a medium by several revolutions of the cylinder, so that the printing can be continued almost immediately after mounting the pressure sleeve.
  • Fig. 1 shows a web material 10, which passes through a gap 12 between a blanket cylinder 14, on which a gap-free, tubular blanket 16 is mounted and a printing cylinder 18 in an offset printing machine.
  • the impression cylinder 18 can be replaced by another blanket cylinder provided with a rubber blanket in order to be able to print on both sides of 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, to the web material 10.
  • a bulge 30 is also formed in the printing form 20. This is caused by a wave of a medium 31 which moves forward in front of the gap 28 between the blanket cylinder 14 and the printing form cylinder 22.
  • the waves of a medium 25, 27 and 31 are created by air, which is enclosed while the blanket 16 is mounted on the blanket cylinder 14, or while the printing form 20 is mounted on the printing form cylinder 22. This enclosed compressed air creates bulges 24, 26, and 30 in front of the columns 28 and 12.
  • the wave of the medium 25 moves continuously 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.
  • any relative movement between the blanket 16 and the blanket cylinder 14 is actually invisible and thus does not cause a printing error.
  • removing the shaft of a medium 31, as well as other waves of medium (not shown), which advance in front of gaps formed between the form cylinder 22 and the inking roller and dampening rollers (not shown), will eliminate any relative movement between the printing form 20 and the printing form cylinder 22 actually invisible and thus does not cause a printing error.
  • the present invention is directed to a device for removing the waves of a medium which produce the bulges in the blanket 16 and the printing form 20.
  • the named invention provides a path along which the advancing waves of a medium (trapped air) can flow from below the printing sleeve, ie the blanket 16 or the printing form 20. It is contemplated that in the system constituting the present invention, any type of Geometry can be applied which enables the medium to flow from a contact surface of the printing sleeve and its corresponding cylinder, ie from the blanket cylinder 14 or from the printing form cylinder 22, to an area with a pressure lower than the hydrodynamic pressure in the waves of the medium.
  • FIG. 3 illustrates such a device having a cylinder 40 with a groove 50 which extends across the circumferential surface of the cylinder.
  • the groove 50 connects the contact point of the cylinder 40 and a pressure sleeve (not shown) mounted thereon with an air channel 60.
  • the air channel 60 supplies compressed air through the passages 65 to radially expand the pressure sleeve so that it can be mounted on the cylinder 40.
  • the air duct 60 can vent to the atmosphere so that the waves of the medium can flow through the grooves 50 into a low pressure area.
  • Figure 4 shows a related embodiment in which a cylinder 70 is provided which has a groove 80 which spirally extends around and across the circumferential surface of the blanket cylinder.
  • Figures 3 and 4 show a single straight and a single spiral groove, many such grooves, which may or may not be interconnected, may be provided.
  • the present invention is also not limited to these configurations.
  • the grooves 50 and 80 can have any type of geometric configuration and any type of cross section.
  • FIG. 5 Another embodiment of the present invention is shown in FIG. 5, wherein a cylinder 90 has a plurality of separate holes 100 that connect a contact point of the cylinder 90 and a pressure sleeve 105 (shown in FIG. 6) mounted thereon to a low pressure region.
  • FIG. 6 shows the plurality of holes 100 leading from the circumferential surface of the cylinder 90 into a channel 110 which opens into the air channel (not shown) and which, while the printing press is running, ventilates to the atmosphere as shown in FIG the embodiments of Figures 3 and 4 is shown.
  • This embodiment is not limited to the arrangement shown in FIGS. 5 and 6. Almost any type of arrangement of holes can be used and the holes can have any type of geometric configuration.
  • This embodiment provides a cylinder which has a rough circumferential surface with a contour determined by maxima 130 and minima 140.
  • the Maxima 130 and Minima 140 can be formed from a variety of cords or roughening.
  • the minima 140 connect the contact point of the cylinder 120 and a pressure sleeve 150 mounted thereon to an area which has a lower pressure than that of the advancing shaft of a medium.
  • the pressure sleeve 150 rides on the maxima 130 and thus enables the enclosed waves of a medium to flow out via the minima 140.
  • a tubular, gap-free pressure sleeve 200 mounted on a cylinder 210 is provided.
  • the pressure sleeve 200 has a groove 220 which extends along its 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 have any type of geometric configuration and any type of cross-section.
  • a plurality of such grooves, which may or may not be interconnected, may also 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 flow through the minima.
  • 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 enclosed medium flows could be either the atmosphere, a vacuum created, or any other area that could be one has lower pressure than the pressure of the advancing 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)
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 true EP0607552A2 (fr) 1994-07-27
EP0607552A3 EP0607552A3 (fr) 1995-05-03
EP0607552B1 EP0607552B1 (fr) 1998-03-11

Family

ID=21726249

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503095A1 (de) * 1995-02-01 1996-08-08 Roland Man Druckmasch Vorrichtung zum Aufspannen eines Sleeves auf einen Druckwerkzylinder
DE19527761A1 (de) * 1995-07-28 1997-01-30 Roland Man Druckmasch Verfahren zum Fixieren von Druckhülsen auf Druckwalzen und Druckwalze
EP1745927A1 (fr) * 2005-07-18 2007-01-24 Hueck Folien GmbH & Co. KG Cylindre d'impression comportant une chemise détachable
DE10039744B4 (de) * 2000-08-16 2008-06-05 Hueck Folien Gesellschaft M.B.H. Spannzylinder zur Aufnahme und Befestigung einer zylindrischen Prägeform mit einer strukturierten Oberfläche

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536764C2 (de) * 1995-10-02 1998-12-03 Tampoprint Gmbh Tamponwalze
DE19602289A1 (de) * 1996-01-23 1997-07-24 Roland Man Druckmasch Druckvorrichtung
DE19602307A1 (de) * 1996-01-23 1997-07-24 Roland Man Druckmasch Druckmaschine
DE19911965C2 (de) * 1999-03-17 2003-04-30 Wifag Maschf Druckform, Verfahren zu ihrer Herstellung und Druckformzylinder für einen Nassoffsetdruck
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
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

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
CH122368A (de) * 1925-09-22 1927-09-16 Maschf Augsburg Nuernberg Ag Formzylinder für Tiefdruckrotationsmaschinen.
CH345023A (de) * 1955-03-30 1960-03-15 Brackenburry Abell George Edmo Rotationsdruckmaschine
NL207494A (fr) 1955-06-28
DE1292958B (de) * 1962-12-01 1969-04-17 Saueressig Kg Geb Walze, insbesondere Druckereiwalze fuer den Textil- und Papierdruck
US3640218A (en) * 1970-06-25 1972-02-08 Thomas K Allison Seal assembly for sleeve-type gravure rolls
GB1401695A (en) * 1972-07-14 1975-07-30 Precision Printing Equipment W Cylinder for a printing machine and a method of securing a printing plate to a printing cylinder
GB1483371A (en) * 1974-09-26 1977-08-17 Buckley Ltd M Printing processes and apparatus
IN146438B (fr) * 1976-01-08 1979-06-02 Strachan & Henshaw Ltd
US4056057A (en) * 1976-02-27 1977-11-01 Livermore And Knight Co., Inc. Vacuum printing cylinder construction
DE2945280C2 (de) * 1979-11-09 1981-06-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zylinder für Rotationsdruckmaschinen
DE3336193C2 (de) * 1983-10-05 1986-02-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Gummituch für eine Offsetrotationsdruckmaschine
EP0278017A1 (fr) * 1987-02-07 1988-08-17 Saueressig Gmbh & Co. Cylindre d'impression en creuse comportant un noyau et un manchon amovible
EP0196443B1 (fr) * 1985-03-29 1990-05-23 Saueressig Gmbh & Co. Cylindre d'impression en creux comportant un noyau et un manchon amovible
DE8532300U1 (de) * 1985-11-15 1986-01-02 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Walzenrohr für Druckmaschinen mit einem auswechselbaren Mantelrohr
DE3543704A1 (de) * 1985-12-11 1987-06-19 Md Papierfabrik Pasing Nicolau Vorrichtung und verfahren zum bedrucken einer bahn
DE3633155A1 (de) * 1986-09-30 1988-04-07 Saueressig & Co Druckzylinder, insbesondere fuer das flexodruckverfahren
JPH0818423B2 (ja) * 1991-03-26 1996-02-28 三菱重工業株式会社 オフセット輪転機版胴
US5245923A (en) * 1992-07-07 1993-09-21 Heidelberg Harris Inc. Printing press with movable printing blanket
DE4432816A1 (de) * 1994-09-15 1996-03-21 Roland Man Druckmasch Druckwalze für den kanallosen Druck

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503095A1 (de) * 1995-02-01 1996-08-08 Roland Man Druckmasch Vorrichtung zum Aufspannen eines Sleeves auf einen Druckwerkzylinder
DE19503095C2 (de) * 1995-02-01 1999-12-16 Roland Man Druckmasch Vorrichtung zum Aufspannen einer Hülse auf einen Druckwerkzylinder
DE19527761A1 (de) * 1995-07-28 1997-01-30 Roland Man Druckmasch Verfahren zum Fixieren von Druckhülsen auf Druckwalzen und Druckwalze
DE19527761C2 (de) * 1995-07-28 2003-02-27 Roland Man Druckmasch Druckwalze zum Befestigen einer Druckhülse
DE10039744B4 (de) * 2000-08-16 2008-06-05 Hueck Folien Gesellschaft M.B.H. Spannzylinder zur Aufnahme und Befestigung einer zylindrischen Prägeform mit einer strukturierten Oberfläche
EP1745927A1 (fr) * 2005-07-18 2007-01-24 Hueck Folien GmbH & Co. KG Cylindre d'impression comportant une chemise détachable

Also Published As

Publication number Publication date
JPH071716A (ja) 1995-01-06
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
EP0607552B1 (fr) 1998-03-11
DE4341262A1 (de) 1994-07-28

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