EP1094948A2 - Mecanisme d'encreur court pour machines d'imprimerie rotatives - Google Patents

Mecanisme d'encreur court pour machines d'imprimerie rotatives

Info

Publication number
EP1094948A2
EP1094948A2 EP99960674A EP99960674A EP1094948A2 EP 1094948 A2 EP1094948 A2 EP 1094948A2 EP 99960674 A EP99960674 A EP 99960674A EP 99960674 A EP99960674 A EP 99960674A EP 1094948 A2 EP1094948 A2 EP 1094948A2
Authority
EP
European Patent Office
Prior art keywords
inking
roller
unit according
short
inking unit
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
EP99960674A
Other languages
German (de)
English (en)
Other versions
EP1094948B1 (fr
Inventor
Hans-Bernhard BOLZA-SCHÜNEMANN
Reinhard Nerger
Bernd Patzelt
Karl Schäfer
Georg Schneider
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer 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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1094948A2 publication Critical patent/EP1094948A2/fr
Application granted granted Critical
Publication of EP1094948B1 publication Critical patent/EP1094948B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders
    • B41F13/21—Bearer rings

Definitions

  • the invention relates to a short inking unit according to the preamble of claim 1.
  • anilox short inking units in newspaper rotary machines for letterpress printing, flexographic printing and offset printing.
  • a chamber doctor blade which with two doctor blades against a structured roller z.
  • an anilox roller (anilox roller) - hereinafter referred to as "anilox roller” - is present, supplied by a pump ink under pressure. Overflowing ink is collected in a paint trough along the anilox roller and fed back to the ink pump.
  • the scraped-off anilox roller only leads to color in its very fine cups. With flexographic printing, it directly colors the soft high-pressure plate. In letterpress printing with hard relief plates and in offset printing (planographic printing), the hard anilox roller cannot directly press the hard printing form e.g. B. ink the printing plate, but via an interposed rubber roller with a hardness of 30 ° - 50 ° Shore A, which serves as an inking roller. It can also be several inking rollers, possibly with rubbers.
  • the invention is based, a short inking unit with a structured roller z.
  • the short inking unit with a structured roller for. B. anilox roller
  • the short inking unit with a structured roller for. B. anilox roller
  • the short inking unit with a structured roller for. B. anilox roller
  • the short inking unit with a structured roller for. B. anilox roller
  • excellent inking results are achieved with a minimal number of rollers, e.g. with only one anilox roller and only one inking roller.
  • the idea of the invention is based initially on the knowledge that in each offset printing unit a rigid forme cylinder prints a rigid rubber blanket cylinder in a first printing zone.
  • the blanket cylinder transfers the print image to the paper, which is fed and discharged via a rigid second blanket cylinder in web-fed rotary printing presses or via a rigid printing cylinder in sheet-fed rotary printing presses.
  • the ink transfer from the printing form to the blanket cylinder and from there later to the paper is possible according to the invention with relatively hard blankets of approximately 70 ° Shore A or more, which are stretched with high circumferential force by means of tensioning devices on the blanket cylinder and which can optionally be retensioned.
  • the short inking unit according to the invention is rigid.
  • the inking roller according to the invention carries a stretched or glued commercially available offset printing blanket of conventional thickness, for. B. 1.95 mm, hardness z. B. 72 ° Shore A whose surface is ground.
  • Bearings are, as already mentioned, attached to both ends of the roller that can be brought into contact with the anilox roller and the inking roller (s). They keep the center distance between the inking roller and anilox roller in the working position constant in the l / 1000th of a millimeter range under pretension. B. 6 mm between anilox roller and inking roller is achieved by appropriate choice of elevator thickness.
  • the roller pins of the inking roller (s) lie directly or indirectly on both sides on fine adjustable side frame fixed stops.
  • the adjustable stops the inking strip can either B. to the same width over the entire length of the roller provided with a coating, -. B. to 8 mm color strip width - can be set.
  • the gurnmituch-related inking roller (s) in the working position but also with their bearer rings can be pressed and locked in this position at the same time against the bearer rings of the anilox roller and that of the forme cylinder.
  • the invention also makes it possible to use inking rollers which are not permanently in contact with the forme cylinder or forme cylinder bearer ring, but are switched on and off in cycles. This is e.g. B. required if two different printing forms for two different colors are in a row on so-called double circumference form cylinders.
  • the bearer rings of the anilox and inking roller ensure that their center distance remains constant - regardless of whether the inking roller receives strong reaction forces from inking the printing plate or not. In the case of single-cylinder form cylinders, these reaction forces also occur in the cylinder channel. These reaction forces can be made practically harmless by the inventive arrangement of the bearer rings on the rollers of the inking unit.
  • the inking unit can be used particularly advantageously for rotary planographic printing (offset printing using and without dampening or separating agents).
  • the "structured roller” has z. B. a ceramic jacket in the wells or hashes are incorporated.
  • the wells can be an oleophilic insert or a reason for e.g. B. copper or polyamide (Rilsan R).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

L'invention concerne un mécanisme encreur pour machines rotatives d'impression à plat, constitué d'un rouleau pourvu d'une surface latérale structurée (par exemple un rouleau quadrillé), d'un encrier, d'un dispositif de raclage et d'un rouleau applicateur pourvu d'une enveloppe présentant l'élasticité du caoutchouc. L'objectif de l'invention est de créer un mécanisme encreur comportant un rouleau structuré, par exemple, un rouleau quadrillé ou un rouleau hachuré. Cet objectif est atteint, selon l'invention, par le fait que les bandes de cylindre du rouleau comportant la surface latérale structurée peuvent être mises sous précontrainte avec la bande de cylindre, qui leur est associée, du rouleau applicateur d'encre, lesdites bandes, pendant le fonctionnement, roulant l'une sur l'autre.
EP99960674A 1998-07-03 1999-07-02 Mecanisme d'encreur court pour machines d'imprimerie rotatives Expired - Lifetime EP1094948B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19829678 1998-07-03
DE19829678 1998-07-03
PCT/DE1999/002134 WO2000002729A2 (fr) 1998-07-03 1999-07-02 Mecanisme d'encreur court pour machines d'imprimerie rotatives

Publications (2)

Publication Number Publication Date
EP1094948A2 true EP1094948A2 (fr) 2001-05-02
EP1094948B1 EP1094948B1 (fr) 2002-03-20

Family

ID=7872820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99960674A Expired - Lifetime EP1094948B1 (fr) 1998-07-03 1999-07-02 Mecanisme d'encreur court pour machines d'imprimerie rotatives

Country Status (3)

Country Link
EP (1) EP1094948B1 (fr)
DE (1) DE59901022D1 (fr)
WO (1) WO2000002729A2 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3302872A1 (de) * 1983-01-28 1984-10-11 Albert-Frankenthal Ag, 6710 Frankenthal Kurzfarbwerk
DE3442662A1 (de) * 1984-11-23 1986-06-05 Albert-Frankenthal Ag, 6710 Frankenthal Farbwerk
DE8913655U1 (de) * 1989-11-18 1989-12-28 MAN Roland Druckmaschinen AG, 6050 Offenbach Kurzfarbwerk mit einer Rasterwalze
DE4211379C2 (de) * 1992-04-04 1999-01-07 Roland Man Druckmasch Anilox-Offset-Druckeinheit mit einem Kurzfarbwerk
DE4424913C2 (de) * 1994-07-14 1996-07-11 Koenig & Bauer Albert Ag Strukturierte Farbübertragungswalze eines Kurzfarbwerkes einer Offsetrotationsdruckmaschine
DE4431464A1 (de) * 1994-09-03 1996-03-07 Koenig & Bauer Albert Ag Kurzfarbwerk
DE19535266A1 (de) * 1995-09-22 1997-04-03 Roland Man Druckmasch Kurzfarbwerk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0002729A2 *

Also Published As

Publication number Publication date
WO2000002729A3 (fr) 2000-05-04
DE59901022D1 (de) 2002-04-25
WO2000002729A2 (fr) 2000-01-20
EP1094948B1 (fr) 2002-03-20

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