EP0458371B1 - Kurzfarbwerk - Google Patents

Kurzfarbwerk Download PDF

Info

Publication number
EP0458371B1
EP0458371B1 EP91112554A EP91112554A EP0458371B1 EP 0458371 B1 EP0458371 B1 EP 0458371B1 EP 91112554 A EP91112554 A EP 91112554A EP 91112554 A EP91112554 A EP 91112554A EP 0458371 B1 EP0458371 B1 EP 0458371B1
Authority
EP
European Patent Office
Prior art keywords
foreshortened
ink
inking unit
roll
doctor
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
EP91112554A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0458371A1 (de
Inventor
Norbert Köbler
Pirmin Göbel
Rudolf Herb
Norbert Weisbrod
Helmut Puschnerat
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.)
Albert Frankenthal AG
Original Assignee
Albert Frankenthal 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6320858&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0458371(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Albert Frankenthal AG filed Critical Albert Frankenthal AG
Publication of EP0458371A1 publication Critical patent/EP0458371A1/de
Application granted granted Critical
Publication of EP0458371B1 publication Critical patent/EP0458371B1/de
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
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a short inking unit according to the preamble of claim 1.
  • a short inking unit of this type is known from DE 35 05 598 C2. This is an inking unit for a flexographic printing machine.
  • the known arrangement would be very disadvantageous as an inking unit for an offset printing press.
  • the inflow opening and the overflow opening are located approximately in the middle of the doctor holder.
  • EP-A-0 199 520 shows a gravure printing machine that processes a fast-drying, water-based ink.
  • a flooding of the ink chamber and a uniform ink distribution result from the thin liquid of the ink. Measures to bring about a flooding of the ink chamber and good ink distribution are therefore not necessary.
  • In the Processing tough offset ink would not achieve a reliable flooding of the ink chamber and uniform ink distribution with an arrangement of the type in question.
  • the measures according to the invention advantageously result in a reliable flooding of the ink chamber and a uniform color distribution.
  • the ink flow in the ink chamber runs in the direction of rotation of the anilox roller.
  • the screen roller is therefore supported and evened out by the anilox roller. Because of this, a vortex-free laminar flow can form in an advantageous manner, which is so fast that no significant accumulations of impurities such as water, air and steam bubbles etc. can form.
  • the evaporation of water is effectively counteracted by the cooling effect of the ink flow.
  • emulsion formation is thus largely prevented and excellent tone sensitivity is achieved.
  • the short inking unit on which FIG. 1 is based consists of a rubberized applicator roller 2 cooperating with a plate cylinder 1 covered with hard offset printing plates and having the same diameter as the plate cylinder and an anilox roller 3 interacting with the applicator roller 2 and having a smaller diameter.
  • the applicator roller 2 together with a dampening unit designated as a whole by 4.
  • the circumference of the anilox roller 3, which is made of steel, is provided with cups 5 indicated in an enlarged manner in FIG. 1, and webs 6 delimiting them.
  • the cups 5 are filled with paint, the webs 6 are scraped off, so that there is an exact dosage of the color corresponding to the capacity of the cups 5.
  • the ink supply to the anilox roller 3 and the doctoring take place by means of a chamber doctor blade arrangement designated as a whole in FIG.
  • a plurality of chamber doctor blade arrangements arranged next to one another for example two chamber doctor blade arrangements 7 each comprising half a roller length, can be provided over the length of the anilox roller 3.
  • the use of a plurality of chamber doctor blade arrangements arranged next to one another simplifies handling and enables the ink supply of the anilox roller 3 to be shut down zone by zone.
  • the chambered doctor blade arrangement 7 comprises, as can best be seen from FIG. 2, a bar-shaped doctor holder 9 which can be received on supports 8 fixed to the frame and on which two doctor blades 11 and 12 held by jaws 10 and offset in the direction of rotation of the associated anilox roller 3 are accommodated.
  • the doctor blades 11 and 12 can be clamped using the jaws 10.
  • the jaws 10 together with the doctor holder 9 are intended to delimit a holding slot into which the doctor blades 11, 12 are loose, ie can be inserted without clamping.
  • the holding slot mentioned has a clear width which is approximately 3 / 100mm to 4 / 100mm above the thickness of the doctor blade assigned in each case.
  • This unclamped arrangement of the doctor blades 11 and 12 ensures that the doctor blades can expand in their longitudinal direction, provided that heating occurs during operation. As a result of this degree of freedom of the doctor blades, it is achieved that the doctor blades remain straight in the event of heating.
  • the doctor pressure can accordingly be comparatively small, which has a favorable effect on the avoidance of wear.
  • the loose doctor blade arrangement simplifies the doctor blade change.
  • the two doctor blades 11, 12 offset from one another form the rear and front boundaries of an ink chamber 13 in the direction of rotation of the anilox roller 3, the radial boundaries of which are formed by the doctor blade holder 9 or the circumference of the anilox roller 3.
  • the ink chamber 3 is closed on the face side by sealing jaws 27, which bridge the two doctor blades 11, 12 and rest against the circumference of the anilox roller 3.
  • the sealing jaws 27 can be covered by counterholders, not shown, to ensure reliable contact with the doctor blades.
  • the doctor blade 11 which is at the rear in the direction of rotation of the anilox roller 3, functions as a preliminary doctor blade, which wipes off residues such as residual ink, water, dust particles etc. adhering to the peripheral section of the anilox roller 3 coming back from the contact area with the applicator roller 2.
  • the Residues wiped off the doctor blade 11 are collected by a drainage channel 14 underneath it, arranged with a slope.
  • the doctor blade in the direction of rotation of the anilox roller 3 functions as the main doctor blade, which, after the inking of the circumference of the anilox roller 3 has been inked, scrapes off the webs 6.
  • the doctor blades 11, 12 can be arranged symmetrically to an imaginary central longitudinal plane if the reversibility of the running direction of the anilox roller 3 is desired, i. H. be inclined towards each other in a roof shape, so that the doctor blade acting as the main doctor blade is positioned negatively, i.e. with the circumferential section of the anilox roller 3 lying behind in the direction of rotation of the anilox roller 3 encloses an obtuse angle.
  • both doctor blades 11, 12 rest against the circumference of the anilox roller 3 with a negative angle of attack, the direction of rotation indicated by an arrow cannot be reversed here.
  • the negative inclination of the two doctor blades 11, 12 ensures that hydrodynamic interferences do not occur in the area of the main doctor blade as well as in the area of the pre-doctor blade, even at high speeds of rotation of the anilox roller 3.
  • the front doctor blade 12 in the direction of rotation can be set somewhat steeper than the rear doctor blade 11.
  • the ink chamber 13 is supplied with ink.
  • the ink chamber 13 can be connected to an ink pump 16 in a pressure-tight manner by means of a supply line 15 which is only indicated schematically.
  • the squeegee holder 9 can have inflow bores opening out into the ink chamber 13 be provided, via which the supply line 15 is connected directly to the ink chamber 13.
  • a distributor chamber 17 accommodated in the doctor blade holder 9 is provided.
  • This is designed as a groove-shaped recess in the doctor blade holder 9, which is closed on the roller side by an application bar 20 which is accommodated in a floating manner and which lies in the area between the two doctor blade blades 11 and 12 on the circumference of the anilox roller 3.
  • the application bar 20 is provided with a plurality of inflow bores 19a, which are distributed uniformly over their length. These open into a pocket 21 which is provided in the region of the roll-side surface of the application bar 20 and is continuous in the longitudinal direction.
  • the pocket 21 has a cross section tapering in the direction of rotation of the anilox roller 3.
  • the extension of the application bar 20 is supported by a spring 23 which engages under it and is supported on the doctor holder 9.
  • the distribution chamber 17 is accessible from the outside via a connection bore 18 opening outwards, to which the supply line 15 can be connected.
  • the paint pump 16 circulates the paint, the paint in the paint chamber 13 with a slight overpressure, which a good filling of the cells 5 is guaranteed.
  • excess ink is discharged through one or preferably a plurality of overflow openings 25a distributed uniformly over the length. These are arranged near the front corner of the ink chamber 13 in the direction of rotation of the anilox roller 3 and are formed by bores of the squeegee holder 9 opening outwards, to which a pressure-free return line 26 can be connected.
  • the placement of the overflow openings 25a in the area adjacent to the doctor blade 12 results in a relief and good cooling of this doctor blade.
  • the flow of the ink runs in the direction of rotation of the anilox roller, so that a vortex-free laminar flow can form. Impurities are quickly and reliably removed from the ink chamber with the paint, so that no accumulations of it can form in it.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP91112554A 1987-02-12 1988-01-09 Kurzfarbwerk Expired - Lifetime EP0458371B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19873704433 DE3704433A1 (de) 1987-02-12 1987-02-12 Kurzfarbwerk
DE3704433 1987-02-12
EP88100219A EP0278225B1 (de) 1987-02-12 1988-01-09 Kurzfarbwerk

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP88100219.0 Division 1988-01-09

Publications (2)

Publication Number Publication Date
EP0458371A1 EP0458371A1 (de) 1991-11-27
EP0458371B1 true EP0458371B1 (de) 1995-04-26

Family

ID=6320858

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91112554A Expired - Lifetime EP0458371B1 (de) 1987-02-12 1988-01-09 Kurzfarbwerk
EP88100219A Expired - Lifetime EP0278225B1 (de) 1987-02-12 1988-01-09 Kurzfarbwerk

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88100219A Expired - Lifetime EP0278225B1 (de) 1987-02-12 1988-01-09 Kurzfarbwerk

Country Status (3)

Country Link
US (1) US5058502A (enrdf_load_stackoverflow)
EP (2) EP0458371B1 (enrdf_load_stackoverflow)
DE (3) DE3704433A1 (enrdf_load_stackoverflow)

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DE3800411A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Farbwerk
DE3838546A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Rakeleinrichtung
DE3800412A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Farbwerk
DE3823340C2 (de) * 1988-07-09 1995-12-07 Fischer & Krecke Gmbh & Co Kammerrakel für Rotations-Druckmaschinen
DE3832183C1 (enrdf_load_stackoverflow) * 1988-09-22 1990-02-22 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US4998475A (en) * 1988-09-22 1991-03-12 Man Roland Druckmaschinen Ag Compact printing machine inker system
DE3832216C1 (enrdf_load_stackoverflow) * 1988-09-22 1990-05-31 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
EP0368485A3 (en) * 1988-10-31 1991-01-30 Seiken Graphics, Inc. Improvements in or relating to lithographic printing
DE3843017C1 (enrdf_load_stackoverflow) * 1988-12-21 1990-05-23 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
JPH0297034U (enrdf_load_stackoverflow) * 1989-01-23 1990-08-02
JPH02194952A (ja) * 1989-01-23 1990-08-01 Asahi Shinbunsha:Kk キーレスインキング方法及び装置
DE8912194U1 (de) * 1989-10-13 1989-11-23 MAN Roland Druckmaschinen AG, 6050 Offenbach Farbwerk
DE3938447A1 (de) * 1989-11-18 1991-05-23 Roland Man Druckmasch Farbwerk mit zonaler dosierung der farbmenge
DE4012825A1 (de) * 1990-04-23 1991-10-24 Koenig & Bauer Ag Kammerrakel
US5088402A (en) * 1990-06-07 1992-02-18 Rockwell International Corporation Pressurized printing fluid input system for keyless lithographic printing
CA2094826C (en) * 1990-11-02 1995-08-29 Emmett Ii Leopardi Apparatus and method for applying ink to a substrate
DE4117390C2 (de) * 1991-05-28 2003-11-06 Koenig & Bauer Ag Rakelbalken für ein Farbwerk einer Rotationsdruckmaschine
DE4119338A1 (de) * 1991-06-12 1992-12-17 Koenig & Bauer Ag Kurzfarbwerk fuer eine offset-rollenrotationsdruckmaschine
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DE4208295A1 (de) * 1992-03-16 1993-09-23 Roland Man Druckmasch Einfaerbevorrichtung fuer eine rasterwalze
DE4213660C2 (de) * 1992-04-25 1995-06-08 Koenig & Bauer Ag Kurzfarbwerk für eine Rollenrotationsdruckmaschine
DE4213659C2 (de) * 1992-04-25 1995-06-08 Koenig & Bauer Ag Kurzfarbwerk für eine Rotationsdruckmaschine
US5410961A (en) 1992-12-30 1995-05-02 Fit Group, Inc. Fountain assembly
DE4302671A1 (de) * 1993-01-30 1994-08-18 Roland Man Druckmasch Kurzfarbwerk
DE9307999U1 (de) * 1993-05-27 1993-07-22 Man Roland Druckmaschinen Ag, 63069 Offenbach Kammerrakel
GB2278315B (en) * 1993-05-27 1996-06-12 Roland Man Druckmasch Chambered doctor blade unit
DE4414681A1 (de) * 1993-05-27 1994-12-01 Roland Man Druckmasch Kammerrakel
DE4401299C2 (de) * 1994-01-18 1997-04-30 Roland Man Druckmasch Vorrichtung zum Einfärben einer Rasterwalze einer Rotationsdruckmaschine
US5531161A (en) * 1994-12-07 1996-07-02 Eastman Kodak Company Gravure coating feeder apparatus
EP0870609A3 (de) * 1997-04-10 1999-05-12 Kba-Planeta Ag Bogenoffsetdruckmaschine
US6119595A (en) * 1997-10-06 2000-09-19 R. J. Reynolds Tobacco Company Gravure printing press with encapsulated ink applicator and method
DE19757897C1 (de) * 1997-12-24 1999-07-22 Koenig & Bauer Ag Anordnung für ein Farbwerk einer Rotationsdruckmaschine
DE10158485A1 (de) 2001-01-12 2002-07-18 Heidelberger Druckmasch Ag Farbwerk in einer Druckmaschine
DE10235410B4 (de) * 2001-09-07 2015-03-05 Heidelberger Druckmaschinen Ag Farbauftragswalze
DE102005041187A1 (de) * 2005-08-31 2007-03-01 Koenig & Bauer Ag Vorrichtung und Verfahren zum Entfärben einer Walze an einer Rotationsdruckmaschine
DE102005041185B4 (de) * 2005-08-31 2014-03-27 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Einfärben einer Walze an einer Rotationsdruckmaschine
DE102007000812A1 (de) 2007-10-02 2009-04-09 Koenig & Bauer Aktiengesellschaft Einrichtung zum Einfärben einer Druckfarbe übertragenden Walze einer Rotationsdruckmaschine und ein Rakelbalken
DE102009005291A1 (de) 2008-02-08 2009-08-13 Heidelberger Druckmaschinen Ag Verfahren zum Einrichten eines Farbkastens einer Druckmaschine
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Also Published As

Publication number Publication date
US5058502A (en) 1991-10-22
EP0458371A1 (de) 1991-11-27
DE3879982D1 (de) 1993-05-13
DE3853686D1 (de) 1995-06-01
EP0278225A3 (en) 1990-05-23
EP0278225B1 (de) 1993-04-07
EP0278225A2 (de) 1988-08-17
DE3704433A1 (de) 1988-08-25
DE3704433C2 (enrdf_load_stackoverflow) 1989-01-19

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