EP0659585B1 - Blanchet d'impression à profil non-uniforme - Google Patents

Blanchet d'impression à profil non-uniforme Download PDF

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Publication number
EP0659585B1
EP0659585B1 EP94116700A EP94116700A EP0659585B1 EP 0659585 B1 EP0659585 B1 EP 0659585B1 EP 94116700 A EP94116700 A EP 94116700A EP 94116700 A EP94116700 A EP 94116700A EP 0659585 B1 EP0659585 B1 EP 0659585B1
Authority
EP
European Patent Office
Prior art keywords
blanket
rubber blanket
printing
cylinder
web
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
EP94116700A
Other languages
German (de)
English (en)
Other versions
EP0659585A1 (fr
Inventor
James B. Vrotacoe
Daniel Paul Gagne
Charles Reif Hammond
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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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0659585A1 publication Critical patent/EP0659585A1/fr
Application granted granted Critical
Publication of EP0659585B1 publication Critical patent/EP0659585B1/fr
Anticipated expiration legal-status Critical
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers

Definitions

  • the present invention has been made to solve problems in the Printing, especially when it comes to offset printing.
  • DE 31 14 580 A1 relates to a device for uneven tensioning of the Blanket on the cylinder of an offset printing machine.
  • the clamping devices for Fixation of the blanket end, rotatable blanket spindle points in the middle area has a smaller diameter than at the edge areas.
  • CH-A-355 786 discloses a machine for printing paper and other fabrics in Webs using gravure rollers. At least one of the rotogravure rollers has at least one taper towards the roller ends. The roller core can also counteract both roller ends have a taper. It is also disclosed on the cylindrical roller core at least one intermediate layer made of rubber to apply less elastic material in such a way that a against the roller ends Taper is formed and a rubber jacket is attached underneath.
  • a printing unit for rotary printing machines is known from FR-A-2 157 464 which has a plate cylinder, a blanket cylinder and a Includes pressure cylinder.
  • the radial distance between the surface of at least one Cylinder and its axis of rotation decreases progressively, roughly in the direction of rotation from start of print to end of print.
  • One cause of the deformation is the tendency of the web to take on moisture as it runs through the printing units.
  • the source of this moisture is the dampening solution supplied to the printing plate, which is used to cover those parts of the plate on which no color is desired, ie they become hydrophobic. It may be that the web absorbs so much moisture that Wide printing "appears, which means a lateral stretching of the web. Since this phenomenon of stretching occurs in each individual printing unit and can deteriorate noticeably from printing unit to printing unit, the geometry of the web is deformed as a result and the web is run as it runs the printing press is becoming increasingly wider, and this lateral deformation leads to the above-mentioned inaccurate registration of the images.
  • a conventional solution to this problem is to create a leveling formation in the web before it arrives at the blanket in the printing unit.
  • Image regulators are rotating wheels which press the width-reducing furrows into the web before it runs into the printing unit.
  • This stretching is caused by those of the image regulator wheels This causes the constriction to be compensated and the register accuracy to be fostered.
  • the causes of wrinkling are various, e.g. B. vibrations and mechanical Misalignments and inconsistencies in the production of the web itself
  • the solution to the wrinkle problem is to try to remove it, after it has formed. It is e.g. B. often a concave spreader roller used to smooth the wrinkled web laterally.
  • the orbit is usually over an inflexible steel roller with a degree of curvature of approx. 90-180 ° and one winding concave profile.
  • the movement of the web on a concave steel roller this Size causes the web to stretch laterally.
  • a variant to the concave Spreader roller is a cylindrical roller that is rotated around a curved axis of rotation.
  • Wrinkles can form in the printing nip of the blanket cylinder when the web is in contact over the blanket cylinder with one prevailing along its printing gap irregular speed profile moves. Due to the geometric deformation, which the web experiences when it moves over a cylinder and a rubber blanket, which are each somewhat deformable, the effective speed of the web varies along the linear extension of the printing gap of the blanket cylinder with which this is moved. For example, the effect of a cylinder bend and / or Blanket stiffness and / or elasticity that the moving through the pressure gap Track achieves a varying speed profile, with the center of the track itself moves faster than the outside of the web, which leads to wrinkling.
  • This is a Example of a problem that arises in a printing unit and best in that Printing unit itself should be solved without smearing the printed image.
  • the present invention addresses the problem of To solve wrinkling within the printing unit on the blanket cylinder so that this solution can also be used in any other printing unit, the more accurate it is To ensure that the images are kept in register from printing unit to printing unit.
  • the solution according to the invention with a multilayer structure of a rubber blanket from seamless cylindrical shape, with suitable profiling leads to the prevention of mentioned wrinkle formation or alternatively to smoothing existing wrinkles in the Material web.
  • By varying the material properties in the axial direction in the Pressure gap a uniform speed profile are generated, which one has a corrective effect on the web.
  • By overcompensating the Velocity profiles can generate lateral forces on the web in the pressure gap, whereby a spreading effect can be achieved.
  • Spreader roller technology is superior as it is applied in the printing unit itself can be where spreader rolls as such are not for the reasons mentioned above can be used.
  • Rubber blanket made from a mixture of materials.
  • material property for example the compressibility, which is beyond Width may vary.
  • the material property can also be the rigidity.
  • the outer surface of the blanket is flat, the blanket containing an elastomer.
  • the rubber blanket according to the invention is in a printing unit for the offset printing process usable with the following features, one around its axis of rotation has rotatable blanket cylinder, further one on the blanket cylinder stored rubber blanket for transferring a color sample onto a material web, a rotatable plate cylinder with a plate, which carries an image to be printed and of which the color pattern is transferred to the blanket, the printing plate and the Rubber blanket at the pressure gap formed between them in rolling contact and with a drive unit for rotating the plate cylinder and the blanket cylinder and an inking unit for supplying ink to the plate cylinder, the Blanket has an inner surface such that it with the outer surface of the Blanket cylinder is engaged and the blanket is a multi-layer Structure with a layer B made of an elastic deformable material with one layer, which is a printing surface, is of seamless cylindrical construction and is such that its material properties vary in the axial direction, that a uniform speed profile is obtained along the pressure gap.
  • the present invention can be implemented in a number of different ways be and used in various offset printing machines.
  • the The present invention is shown in the accompanying drawings as being applied to a lithographic offset perfecting machine 10.
  • the lithographic printing machine 10 prints on both sides of a material web 12 and includes identical upper and lower blanket cylinders 14 and 16. Which refer to the Blanket cylinders 14, 16 located blankets 18 and 20 transmit color samples on both sides of the web 12. Wear an upper and a lower plate cylinder 22 and 24 Pressure plates, which are at the pressure gaps 26 and 28 in rolling contact with the Blankets 18, 20 are located. In the printing columns 26, 28 color samples of the Transfer printing plates on the plate cylinders 22, 24 to the blankets 18, 20. These color patterns are in turn by the rubber blankets 18, 20 on both sides of the Transfer web 12.
  • the printing press comprises an upper and lower dampening unit 30, 32, of which Dampening solution is fed to the printing plates on the plate cylinders 22, 24. Furthermore, from an upper and lower inking unit 34, 36 color to the Printing plates on the plate cylinders 22, 24 fed.
  • One schematically in Fig. 1 shown drive unit 38 rotates the blanket cylinders 14, 16 and Plate cylinders 22, 24 with the same surface speed.
  • the Drive unit 38 also provides the power to drive dampening units 30 and 32 and the inking units 34 and 36. It is conceivable that the printing press 10 is different from that construction shown herein.
  • the Printing machine 10 may be designed so that it prints only on one side of the web 12.
  • the rubber blanket itself is preferably made of rubber-like material, namely Nitrile®, and it can be reinforced with fabric fibers.
  • the construction and composition a blanket is disclosed in U.S. Patent Application No. 07 / 699,668 and also in U.S. patents No. 3,700,541 (Shrimpton), No. 4,303,721 (Rodriguez) and No. 4,042,743 (Larson) described in detail.
  • the blanket 18 illustrated in FIG. 2 is a composition of Layers A, B, C and D.
  • Layer A is a reinforcing layer consisting of elastic textile fibers 1, e. G. Rayon threads® that are partially in the surface of a elastic polymer composition 2 for example a mixture of nitrile rubber and Polypropylene or Nylon® are embedded.
  • Layer B is a compressible layer consisting of an elastic one microcellular polymer, e.g. B. a microcellular nitrile rubber in the form embedded hollow micropores contains evenly distributed microcells.
  • Layer C is a textile layer 3 consisting of a material with approx. 40 Warp threads per cm, which are impregnated with a polymer composition 4, the Polymer composition can be the same as the printing surface, e.g. B. a nitrile rubber composition.
  • Layer D is a printing surface in the form of a veneer made from one solvent resistant elastomer, e.g. B. a nitrile rubber composition.
  • Fig. 3 shows a rubber blanket, the profile 19 'not in its thickness, but in its Stiffness, compressibility or its coefficient of friction varies. For example, it can with a profile that is stiffer at the ends of the rubber blanket than in the middle correctable speed profile can be obtained along the pressure gap.
  • the speed along the roller depends on the effective one Radius, which corresponds to the bending of the cylinder roller and also to the Compressibility or stiffness of the roll surface varies.
  • the Compressibility or stiffness can be varied to the effective radius of the Vary cylinder roller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Soft Magnetic Materials (AREA)

Claims (9)

  1. Blanchet destiné au procédé d'impression offset, le blanchet (18, 20) ayant une structure à plusieurs couches (A, B, C, D) comprenant une couche (B) en matière élastique déformable et une couche (D) qui est une surface d'impression, étant d'un mode d'exécution cylindrique sans joint et étant de constitution telle que sa caractéristique de matière varie en direction axiale de façon qu'au cours de l'impression un profil régulier de vitesse puisse être obtenu le long d'un interstice d'impression.
  2. Blanchet selon la revendication 1,
    caractérisé
    en ce que le blanchet consiste en un mélange de matières.
  3. Blanchet selon la revendication 1,
    caractérisé
    en ce que la caractéristique de matière est la compressibilité.
  4. Blanchet selon la revendication 1,
    caractérisé
    en ce que la caractéristique de matière est la rigidité.
  5. Blanchet selon la revendication 1,
    caractérisé
    en ce que la surface extérieure du blanchet est unie.
  6. Blanchet selon la revendication 1,
    caractérisé
    en ce que le blanchet (18, 20) contient un élastomère.
  7. Groupe d'impression destiné au procédé d'impression offset, ayant les particularités suivantes :
    il comprend un cylindre rotatif de blanchet (14, 16) comportant un axe de rotation,
    il comprend un blanchet (18, 20) monté sur le cylindre de blanchet (14, 16) et destiné au transfert d'un motif d'encrage sur une bande de matière (12),
    il comprend un cylindre porte-plaque rotatif (22, 24) équipé d'une plaque qui porte une image à imprimer et dont le motif d'encrage est transféré au blanchet (18, 20), la plaque d'impression et le blanchet étant en contact de roulement le long de l'interstice d'impression (26, 28) qui est formé entre eux, et
    il comprend un groupe de commande destiné à faire tourner le cylindre porte-plaque (22, 24) et le cylindre de blanchet (14, 16), ainsi qu'un mécanisme d'impression (34, 36) destiné à amener de l'encre au cylindre porte-plaque (22, 24), le blanchet comportant une surface intérieure de constitution telle qu'elle soit en prise avec la surface extérieure du cylindre de blanchet (14, 16) et le blanchet ayant une structure en plusieurs couches (a, b, c, d) comprenant une couche (B) en matière déformable élastique et une couche (D) qui est une surface d'impression, étant d'un mode d'exécution cylindrique sans joint et étant d'une constitution telle que sa caractéristique de matière varie en direction axiale de manière qu'un profil régulier de vitesse soit obtenu le long de l'interstice d'impression (26, 28).
  8. Groupe d'impression selon la revendication 7,
    caractérisé
    en ce que la caractéristique de matière est la rigidité.
  9. Groupe d'impression selon la revendication 7,
    caractérisé
    en ce que la caractéristique de matière est la compressibilité.
EP94116700A 1993-12-21 1994-10-22 Blanchet d'impression à profil non-uniforme Expired - Lifetime EP0659585B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17095693A 1993-12-21 1993-12-21
US170956 1993-12-21

Publications (2)

Publication Number Publication Date
EP0659585A1 EP0659585A1 (fr) 1995-06-28
EP0659585B1 true EP0659585B1 (fr) 1999-08-11

Family

ID=22621971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116700A Expired - Lifetime EP0659585B1 (fr) 1993-12-21 1994-10-22 Blanchet d'impression à profil non-uniforme

Country Status (4)

Country Link
EP (1) EP0659585B1 (fr)
JP (1) JP3638326B2 (fr)
AT (1) ATE183144T1 (fr)
DE (2) DE4436973C2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10257746B3 (de) * 2002-12-10 2004-06-24 Man Roland Druckmaschinen Ag Formzylinder einer Rotationsdruckmaschine, insbesondere einer Offsetdruckmaschine
JP3917269B2 (ja) * 1997-10-07 2007-05-23 パイロットインキ株式会社 可逆熱変色性組成物
US6098540A (en) † 1998-08-10 2000-08-08 Heidelberger Druckmaschinen Ag Apparatus and method for reducing mottling in printing presses
FR2789347B1 (fr) * 1999-02-04 2001-04-06 Rollin Sa Blanchet a proprietes de surface variables pour machine a imprimer
DE10257745A1 (de) * 2002-12-10 2004-07-22 Man Roland Druckmaschinen Ag Gummizylinderhülse für Offset-Druckmaschinen
DE10258048A1 (de) 2002-12-11 2004-06-24 Man Roland Druckmaschinen Ag Gummituchzylinder für Offset-Druckmaschinen
US7073435B2 (en) † 2003-07-11 2006-07-11 Goss International Americas, Inc. Printing blanket with convex carrier layer
DE10335758C5 (de) 2003-08-05 2015-12-03 Manroland Web Systems Gmbh Verfahren und Druckwerk zur Beeinflussung der lateralen Bahnspreizung insbesondere an Rotationsdruckmaschinen
DE10340569A1 (de) * 2003-09-01 2005-04-07 Koenig & Bauer Ag Verfahren zur Reduktion von Passerfehlern auf einer in einer bahnverarbeitenden Vorrichtung und ein Druckwerk
DE102004005893B4 (de) * 2003-10-08 2010-11-04 Koenig & Bauer Aktiengesellschaft Aufzüge für einen Zylinder einer Druckmaschine, Satz von Aufzügen sowie Verfahren zu deren Herstellung
DE10360013A1 (de) * 2003-12-19 2005-07-21 Man Roland Druckmaschinen Ag Walze, insbesondere Papierleitwalze für Rotationsdruckmaschinen
DE102004056389B4 (de) * 2004-09-16 2008-05-21 Koenig & Bauer Aktiengesellschaft Druckwerk einer Offsetdruckmaschine mit mindestens einem Formzylinder und einem Übertragungszylinder
DE102005022986A1 (de) 2005-05-19 2006-11-23 Man Roland Druckmaschinen Ag Rollenrotationsdruckmaschine mit mindestens einem Druckwerk
DE102006040388A1 (de) * 2006-08-29 2008-03-13 Maschinenfabrik Wifag Anordnung von Drucktüchern auf Druckzylindern einer Rotationsdruckmaschine
DE102008004892A1 (de) * 2008-01-17 2009-07-23 Manroland Ag Druckwerk einer Druckmaschine und Übertragungsform
ES2436544T3 (es) * 2010-05-07 2014-01-02 Kba-Notasys Sa Cilindro de impresión para huecograbado y procedimiento de huecograbado

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Publication number Priority date Publication date Assignee Title
CH355786A (de) * 1958-01-24 1961-07-31 Winkler Fallert & Co Maschf Maschine zum Bedrucken von Papier und andern Stoffen in Bahnen mittels Tiefdruckwalzen
IT966154B (it) * 1971-10-16 1974-02-11 Maschf Augsburg Nuernberg Ag Perfezionamento nelle macchine da stampa offset
DE2660483C3 (de) * 1976-06-29 1982-03-18 Bosse, Rolf, Dr.-Ing., 4837 Verl Mehrschichtiges Drucktuch, insbesondere zum Offsetdrucken
DE3114580A1 (de) * 1981-04-10 1982-10-28 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach "vorrichtung zum ungleichmaessigen spannen des gummituches auf dem zylinder einer offsetdruckmaschine"
US4378737A (en) * 1981-06-01 1983-04-05 Robud Company Roller apparatus with replacement blanket
JPS5943166U (ja) * 1982-09-13 1984-03-21 住友ゴム工業株式会社 オフセツト印刷機用ブランケツト
SE455285B (sv) * 1983-08-15 1988-07-04 Wifag Maschf Valsrotations- offsettryckmaskin
DE3672633D1 (de) * 1985-03-14 1990-08-23 Roland Man Druckmasch Druckwerk fuer eine offset-rotationsdruckmaschine.
JPS6233444U (fr) * 1985-08-12 1987-02-27
GB8703158D0 (en) * 1987-02-10 1987-03-18 P & S Textiles Ltd Industrial fabrics
JPH0592541A (ja) * 1991-10-02 1993-04-16 S P Kizai:Kk 凹版オフセツト印刷法
JPH05155172A (ja) * 1991-12-10 1993-06-22 Matsushita Electric Ind Co Ltd ブランケット
JPH06246896A (ja) * 1993-02-26 1994-09-06 Ryobi Ltd オフセット両面印刷機

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Title
STIEBNER, E. D.: "Bruckmann's Handbuch der Drucktechnik, 3. Auflage, Seite 180", BRUCKMANN, MüNCHEN, 1981 *

Also Published As

Publication number Publication date
JPH07205566A (ja) 1995-08-08
DE4436973C2 (de) 2003-06-26
EP0659585A1 (fr) 1995-06-28
DE59408612D1 (de) 1999-09-16
DE4436973A1 (de) 1995-06-22
ATE183144T1 (de) 1999-08-15
JP3638326B2 (ja) 2005-04-13

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