EP0705692A1 - Procédé et dispositif pour changer l'encrier d'une machine à imprimer - Google Patents

Procédé et dispositif pour changer l'encrier d'une machine à imprimer Download PDF

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Publication number
EP0705692A1
EP0705692A1 EP95113219A EP95113219A EP0705692A1 EP 0705692 A1 EP0705692 A1 EP 0705692A1 EP 95113219 A EP95113219 A EP 95113219A EP 95113219 A EP95113219 A EP 95113219A EP 0705692 A1 EP0705692 A1 EP 0705692A1
Authority
EP
European Patent Office
Prior art keywords
roller
printing
stroke
rollers
friction
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
EP95113219A
Other languages
German (de)
English (en)
Other versions
EP0705692B1 (fr
Inventor
Norbert Dr. Thünker
Rudi Junghans
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 EP0705692A1 publication Critical patent/EP0705692A1/fr
Application granted granted Critical
Publication of EP0705692B1 publication Critical patent/EP0705692B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/38—Means for axially reciprocating inking rollers

Definitions

  • the invention relates to a method and an apparatus for converting an inking unit of printing presses, in which areas with different ink layer thicknesses are present on an ink fountain roller transversely to the printing direction, which are applied to a printing form via a number of inking unit rollers and inking rollers and in the inking unit rollers are designed as axially moving friction rollers which periodically perform an axial stroke.
  • DE 41 40 048 A1 proposes to interrupt the drive of a distribution roller via a clutch, so that the periodic axial movement of the distribution roller can be stopped.
  • the disadvantage of this known embodiment is the fact that it causes problems to couple the friction rollers in the correct phase again when the printing unit continues to run, if, for. B. the Print interruption has ended and paper is fed again. If several friction rollers are present in one inking unit, they normally do not perform their axial stroke synchronously, so that a considerable amount of control is required in order to achieve the previously set axial stroke again. A change in the axial stroke movement of the individual friction rollers would have an immediate effect on the printing result and lead to a harmful change in color.
  • the object of the present invention to keep the lateral ink flow in the inking unit as constant as is necessary for the exact inking of the printing form even with widely differing target densities or when printing is interrupted without problems with lateral rubbing.
  • the method for converting an inking unit according to the present invention is characterized in that in the production of printed copies with a relatively uniform ink application across the printing direction, the friction rollers are set to the respectively intended full stroke and in the production of printed copies with a crosswise to the printing direction in some areas strongly changing ink application or in the event of a brief interruption in printing, the stroke of at least the first distribution roller, which follows after the ink fountain roller, is changed to a low value close to 0 while the printing unit continues to run.
  • the friction roller thus converted continues to perform a short stroke, e.g. B. of 1 mm, so that there is no change in the phase position of the lateral movement of the friction roller.
  • a device for carrying out the method is characterized in that the axial stroke of the distribution roller takes place via an eccentrically offset roller mounted on the journal of the distribution roller, which can be moved between two parallel running surfaces mounted on the machine side frame, that the roller has a rotary drive, so that their eccentric arrangement axially moves the friction roller back and forth and that the distance of at least one of the two parallel running surfaces to the opposite running surface can be increased. Due to the larger distance between the two treads, the eccentrically mounted roller rotates over most of its rotary motion without transmitting a stroke to the respective friction roller. Only in the area of their turning points does the roller hit one of the two running surfaces, so that, depending on the distance, z. B. only an axial stroke of 1 mm is carried out. The distance between the two running surfaces depends on the eccentricity of the journal of the roller relative to the rotary drive, which can be set individually.
  • Fig. 1 is a diagram of the color distribution of any four zones, the individual zones on the ink fountain z. B. are set to the values 8.80, 10.80, 0.60 and 10.80 because the area coverage in the zones is very different.
  • a color profile of 0.98, 0.98, 1.17 and 0.96 is then created on the printed sheet.
  • the value of 1.17 in the zone with the lowest ink supply of 0.60 arises due to the lateral rubbing, in particular of the upper friction rollers, so that the ink layer thickness of 1.17 in no way corresponds to the ink requirement in this zone.
  • This phenomenon occurs in the normal printing process, but especially when e.g. B. the printing is briefly interrupted, so that a longer running-in phase with appropriate markup is required when the inking rollers are re-positioned on the printing plate in order to restore an ink layer thickness corresponding to the ink requirements in the zones.
  • the setting of the individual color zones on the ink fountain is also made to the values 8.80, 10.80, 0.60 and 10.80.
  • at least the first distribution roller after the ink fountain roller is set to a low value close to 0. It is hereby achieved that the weak zone with the value 0.60 from the two neighboring zones with the values 10.80 does not receive as much ink, so that in this zone only a color layer thickness with the value 1.02 is achieved on the printed sheet. There is therefore no overstaining, but a layer thickness in the halftone dot, which enables exact printing after just a few sheets.
  • a friction roller (not shown) of an inking unit, a worm 3 and a worm wheel 4 are arranged in a gear box 2, the worm 3 being fastened on the journal 1 of the friction roller.
  • the gearbox 2 is mounted on the knuckle 1 of the friction roller via ball bearings 5 and a needle bearing 6 and moves back and forth with the knuckle 1 of the friction roller.
  • a support pin 7 is fastened laterally to the gearbox 2 parallel to the steering knuckle 1 and moves back and forth in a bearing 8 which is fastened in a bearing plate 9. (Fig. 3)
  • crank pin 10 shows the gearbox 2 in a cross section, with the worm wheel 4 mounted on a crank pin 10.
  • the crank pin 10 is rotatably mounted in the gear box 2 via a ball bearing 11 and a needle bearing 12.
  • the crank pin 10 carries a roller 14 mounted on a roller pin 13.
  • the roller pin 13 can be slidably mounted on the flange 15 so that the degree of eccentricity e can be adjusted.
  • the lateral stroke of the friction roller which corresponds to twice the dimension e, can be adapted to the requirements given in printing.
  • Fig. 5 shows the roller 14 between two parallel treads 16, 17 of which the tread 17 on one Carrier 18 is provided, which is attached to the machine side frame 19.
  • Two bearing journals 20 are fastened in the carrier 18 (FIG. 6), on which a sliding body 21 is axially displaceable, on which the second running surface 16 is provided.
  • the displacement of the sliding body 21 can, for. B. done via an actuator 22 which is fixed in the carrier 18.
  • the motor pin 23, which is connected to the sliding body 21 via a ball bearing 24, can be moved so far to the left in the direction of the arrow that the sliding body 21 assumes the position shown in broken lines. (Figs. 5 and 6)
  • the enlarged distance between the two treads 16, 17 is drawn in solid lines, this distance corresponding to the dimension a.
  • the dimension a can e.g. B. twice the eccentricity e plus once the diameter of the roller 14 minus 1 mm.
  • the axial stroke of the friction roller would be 1 mm. This stroke arises from the fact that the roller 14 is shifted from its solid upper position after a rotary movement of 180 ° in the position shown in dash-dotted lines relative to the solid surface 16 by 1 mm, so that the friction roller executes a corresponding stroke.
  • the two running surfaces 16 and 17 are pushed together to the dimension b, which corresponds to the diameter of the roller 14.
  • the roller 14 When it rotates, the roller 14 thus moves the friction roller after 180 ° so that it performs the stroke twice e.
  • the full stroke of the crank-mounted roller 14 is thus transferred to the friction roller, while the enlarged Distance a of the treads 16, 17 according to the stroke z. B. has been reduced to 1 mm.
  • the lateral rubbing is changed to a value close to 0, so that there is no unwanted color balance between zones with high color requirements and zones with low color requirements.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP95113219A 1994-10-08 1995-08-23 Procédé et dispositif pour changer l'encrier d'une machine à imprimer Expired - Lifetime EP0705692B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4435991A DE4435991C2 (de) 1994-10-08 1994-10-08 Verfahren und Vorrichtung zum Konstanthalten von Farbschichtdicken in einem Farbwerk einer Druckmaschine
DE4435991 1994-10-08

Publications (2)

Publication Number Publication Date
EP0705692A1 true EP0705692A1 (fr) 1996-04-10
EP0705692B1 EP0705692B1 (fr) 1997-12-29

Family

ID=6530273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113219A Expired - Lifetime EP0705692B1 (fr) 1994-10-08 1995-08-23 Procédé et dispositif pour changer l'encrier d'une machine à imprimer

Country Status (4)

Country Link
US (1) US5701817A (fr)
EP (1) EP0705692B1 (fr)
JP (1) JP3889824B2 (fr)
DE (2) DE4435991C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924072A1 (fr) * 1997-12-17 1999-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Procédé d'opération d'une machine rotative d'impression et dispositif dans une machine rotative d'impression
EP1125739A2 (fr) * 2000-02-18 2001-08-22 Mitsubishi Heavy Industries, Ltd. Mettre en action une machine offset-feuilles comprenant un rouleau baladeur
EP1938988A2 (fr) * 2006-12-14 2008-07-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé de réduction de microbandes d'encre lors de l'impression d'un produit dans une machine d'impression

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612159U1 (de) * 1996-07-12 1996-08-29 MAN Roland Druckmaschinen AG, 63075 Offenbach Einrichtung zur schnellen Schaffung eines Fortdruckzustandes eines Druckwerkes
DE19815293A1 (de) * 1998-04-06 1999-10-07 Heidelberger Druckmasch Ag Druckmaschine und Verfahren zum Betrieb einer Druckmaschine
DE10028317A1 (de) 1999-06-21 2000-12-28 Heidelberger Druckmasch Ag Verfahren zur Steuerung der Zufuhr von Druckfarbe in einer Druckmaschine und Druckmaschine zur Durchführung des Verfahrens
DE10003026B4 (de) * 2000-01-25 2004-03-25 Koenig & Bauer Ag Antrieb für eine Reibwalze
ATE438510T1 (de) * 2000-06-30 2009-08-15 Komori Printing Mach Steuerung für die farbvorrichtung von einer druckmaschine
DE10114250A1 (de) * 2001-03-22 2002-09-26 Fischer & Krecke Gmbh & Co Druckverfahren
DE102008034249B4 (de) 2008-07-23 2013-11-21 manroland sheetfed GmbH Verfahren zum Betreiben eines Farbwerks eines Druckwerks

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434646C1 (de) * 1984-09-21 1985-11-07 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Heberfarbwerk einer Druckmaschine
DE4140048A1 (de) 1991-12-05 1993-06-09 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Farbwerk fuer eine druckmaschine, insbesondere bogenoffsetdruckmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672960A (en) * 1979-11-19 1981-06-17 Tokyo Kikai Seisakusho:Kk Vibrator device of ink cylinder in rotary printer
DE3243582C2 (de) * 1982-11-25 1984-09-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Verändern des axialen Hubes einer Verreibwalze in einer Druckmaschine
EP0403861B1 (fr) * 1989-06-19 1994-08-31 Heidelberger Druckmaschinen Aktiengesellschaft Méthode pour obtenir rapidement l'état d'impression
DE4004056A1 (de) * 1990-02-10 1991-08-14 Roland Man Druckmasch Verfahren und vorrichtung zur farbsteuerung und zonenweisen voreinstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434646C1 (de) * 1984-09-21 1985-11-07 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Heberfarbwerk einer Druckmaschine
DE4140048A1 (de) 1991-12-05 1993-06-09 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Farbwerk fuer eine druckmaschine, insbesondere bogenoffsetdruckmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924072A1 (fr) * 1997-12-17 1999-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Procédé d'opération d'une machine rotative d'impression et dispositif dans une machine rotative d'impression
US6578481B1 (en) 1997-12-17 2003-06-17 Heidelberger Druckmaschinen Ag Method and device for operating a rotary printing press
EP1125739A2 (fr) * 2000-02-18 2001-08-22 Mitsubishi Heavy Industries, Ltd. Mettre en action une machine offset-feuilles comprenant un rouleau baladeur
EP1125739A3 (fr) * 2000-02-18 2001-10-04 Mitsubishi Heavy Industries, Ltd. Mettre en action une machine offset-feuilles comprenant un rouleau baladeur
EP1938988A2 (fr) * 2006-12-14 2008-07-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé de réduction de microbandes d'encre lors de l'impression d'un produit dans une machine d'impression
EP1938988A3 (fr) * 2006-12-14 2011-02-09 Heidelberger Druckmaschinen Aktiengesellschaft Procédé de réduction de microbandes d'encre lors de l'impression d'un produit dans une machine d'impression

Also Published As

Publication number Publication date
JPH08174800A (ja) 1996-07-09
DE59501161D1 (de) 1998-02-05
DE4435991C2 (de) 1998-02-12
US5701817A (en) 1997-12-30
JP3889824B2 (ja) 2007-03-07
DE4435991A1 (de) 1996-04-11
EP0705692B1 (fr) 1997-12-29

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