EP0389922B1 - Farbwerk - Google Patents

Farbwerk Download PDF

Info

Publication number
EP0389922B1
EP0389922B1 EP90105183A EP90105183A EP0389922B1 EP 0389922 B1 EP0389922 B1 EP 0389922B1 EP 90105183 A EP90105183 A EP 90105183A EP 90105183 A EP90105183 A EP 90105183A EP 0389922 B1 EP0389922 B1 EP 0389922B1
Authority
EP
European Patent Office
Prior art keywords
ink
receiving roller
roller
side wall
doctor blade
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
EP90105183A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0389922A3 (de
EP0389922A2 (de
Inventor
Thomas Dr. John
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0389922A2 publication Critical patent/EP0389922A2/de
Publication of EP0389922A3 publication Critical patent/EP0389922A3/de
Application granted granted Critical
Publication of EP0389922B1 publication Critical patent/EP0389922B1/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 an inking unit for a printing press with an ink chamber which is delimited along one side by a rotating ink-receiving roller and has side walls, the end faces of which are facing the ink-receiving roller are curved in accordance with the radius of the ink-receiving roller.
  • the side walls of such an ink chamber are usually arranged parallel to one another and are perpendicular to the axis of the ink pickup roller. This has the disadvantage that the overpressure occurring in the ink chamber presses ink outwards between the ink take-off roller and the end faces of the side walls facing it. This disadvantage occurs in particular when no elastic seal is provided between the ink pick-up roller and the side walls, the seal provided is worn or a non-contact seal is used.
  • the object of the invention is to create a generic arrangement in which the possibility of lateral color leakage is at least reduced.
  • the exemplary embodiment shows a chamber doctor blade, designated overall by 1, which is intended for use in an offset printing machine.
  • the doctor blade 1 comprises a U-shaped base body 2, two side walls 3 and two doctor blades 4, 5.
  • the doctor blades 4, 5 can each be fixed by means of a clamping bar 6, 7 and only schematically indicated screws 8.
  • the chambered doctor blade 1 can be adjusted with the two doctor blades 4, 5 against an ink pickup roller 9 which is provided with a rastered surface and which rotates in the direction of arrow a during operation.
  • the doctor blade 4 scrapes off the excess ink supplied from the ink pick-up roller, while the doctor blade 5 closes the chamber doctor blade 1 at the bottom.
  • Each side wall 3 has an area 10 of smaller wall thickness facing the ink pick-up roller 9.
  • the area 10 is delimited by an end face 11, which is bent in accordance with the radius of the ink pickup roller 9 and forms a gap with a height A of approximately 0.1 to 3 mm.
  • an elastic sealing material could also be applied to the end face 11, the surface of which rests on the ink-receiving roller 9, or the side wall 3 could be resiliently pressed against the ink-receiving roller 9 with the end face 11.
  • a drain plate 12 is fastened, which guides ink passing through, in particular when the ink pick-up roller 9 is stationary or slowly rotating, to a drain pan, not shown.
  • each side wall 3 and thus the end face 11 thereof starting from the contact point B of the ink pick-up roller 9 in the area of the doctor blade 5 to the drainage point C in the area of the doctor blade 4, is arranged to be inclined outwards. This inclination continues on the inside over the entire length of the side wall 3.
  • the entire side wall 3 can also be arranged inclined. Occurs during operation within the ink chamber 1 a pressure P1 in the liquid paint, which is greater than the ambient air pressure P0, this results in a movement component of the color between the end face 11 and Ink pickup roller 9 to the outside with the speed vector v a (see FIG. 3).
  • the rotation of the ink pick-up roller 9 in the direction of arrow a during operation results in a movement component with the speed vector v t for the ink.
  • a resultant velocity can be determined from both vectors with the vector V res .
  • the inclination of the end face 11 to the outside by the angle ⁇ is now chosen so that this angle is equal to or greater than the angle ⁇ between the vectors v t and V res . This ensures that the ink located between the ink pick-up roller 9 and the end face 11 cannot move outwards.
  • the invention is not limited to the chambered doctor blade shown, rather it can also be used in ink fountains for film or lifter inking units.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP90105183A 1989-03-25 1990-03-20 Farbwerk Expired - Lifetime EP0389922B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909878 1989-03-25
DE3909878A DE3909878C1 (enrdf_load_stackoverflow) 1989-03-25 1989-03-25

Publications (3)

Publication Number Publication Date
EP0389922A2 EP0389922A2 (de) 1990-10-03
EP0389922A3 EP0389922A3 (de) 1991-05-02
EP0389922B1 true EP0389922B1 (de) 1993-11-10

Family

ID=6377215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105183A Expired - Lifetime EP0389922B1 (de) 1989-03-25 1990-03-20 Farbwerk

Country Status (4)

Country Link
US (1) US5044277A (enrdf_load_stackoverflow)
EP (1) EP0389922B1 (enrdf_load_stackoverflow)
JP (1) JP2807032B2 (enrdf_load_stackoverflow)
DE (2) DE3909878C1 (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118426A1 (de) * 1991-06-05 1992-12-10 Koenig & Bauer Ag Kammerrakel fuer ein farbwerk einer rotationsdruckmaschine
US5230286A (en) * 1991-10-11 1993-07-27 De La Rue Giori, S.A. Inking unit for a printing machine
DE4213659C2 (de) * 1992-04-25 1995-06-08 Koenig & Bauer Ag Kurzfarbwerk für eine Rotationsdruckmaschine
DE4213660C2 (de) * 1992-04-25 1995-06-08 Koenig & Bauer Ag Kurzfarbwerk für eine Rollenrotationsdruckmaschine
SE470283B (sv) * 1992-05-22 1994-01-10 Aake Boeoese Kammarrakelanordning för tryckverk och tryckverk
FR2705613B1 (fr) * 1993-05-27 1995-11-24 Roland Man Druckmasch Racle à chambre.
DE4447123C1 (de) * 1994-12-29 1996-04-11 Koenig & Bauer Albert Ag Kammerrakel für eine Rotationsdruckmaschine
DE19523378A1 (de) * 1995-06-30 1997-01-02 Koenig & Bauer Albert Ag Bogenoffsetrotationsdruckmaschine
DE19643984B4 (de) * 1996-10-31 2005-01-05 Man Roland Druckmaschinen Ag Funktionssteuerung für eine Dosiereinrichtung
EP1293342A1 (de) * 2001-09-14 2003-03-19 Windmöller & Hölscher KG Farbkammer für Rotationsdruckmaschinen mit stirnseitiger Abdichtung
US7546802B2 (en) * 2003-07-28 2009-06-16 Goss International Americas, Inc. Fluid supply device for a printing machine
BR112013032533A2 (pt) * 2011-11-03 2017-03-01 Tetra Laval Holding & Finance S A aparelho para impressão flexográfica
US9296201B2 (en) 2013-03-13 2016-03-29 Probity Engineering, Llc Ink fountain apparatus and method of adjusting ink flow for a flexographic printing apparatus
GB2582635B (en) * 2019-03-28 2021-12-29 Archipelago Tech Group Ltd Device, method, and assembly for loading nozzles with fluid

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550720A1 (de) * 1975-11-12 1977-06-02 Roland Offsetmaschf Dosiervorrichtung an einem farbkasten
US4058058A (en) * 1976-02-26 1977-11-15 George Hantscho Company, Inc. Ink fountain for printing presses
DE2811276C2 (de) * 1978-03-15 1985-04-25 Mathias Bäuerle GmbH, 7742 St Georgen Vorrichtung zum dosierten Zuführen von Farbe zu einer Ductorwalze eines Offset-Druckgerätes
US4222328A (en) * 1978-07-21 1980-09-16 Flex-O-Line Division Of Kenton Machine Works Doctor blade liquid applicator for metering rolls
US4263848A (en) * 1980-02-08 1981-04-28 American Newspaper Publishers Association Method and apparatus for reducing air entrapment in rotary inking systems
EP0112543B1 (de) * 1982-12-24 1989-07-12 Erich Beck Farbauftragswerk, insbesondere für Flexo- und Tiefdruckmaschinen mit geschwindigkeitsvariablem Reibzylinder
DE3320638C2 (de) * 1983-06-08 1986-10-16 Koenig & Bauer AG, 8700 Würzburg Farbabteileinrichtung an Farbkastenwalzen von Druckmaschinen
DE3408183C1 (de) * 1984-03-06 1985-03-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbkasten fuer Druckmaschinen
US4819558A (en) * 1985-04-18 1989-04-11 Pamarco Incorporated High efficiency fluid metering roll
DE3519294A1 (de) * 1985-05-30 1986-12-04 Koenig & Bauer AG, 8700 Würzburg Wasserkasten fuer ein feuchtwerk einer offset-rotationsdruckmaschine
US4688482A (en) * 1986-01-31 1987-08-25 Tobias Philip E Ink transfer arrangement

Also Published As

Publication number Publication date
DE59003395D1 (de) 1993-12-16
EP0389922A3 (de) 1991-05-02
DE3909878C1 (enrdf_load_stackoverflow) 1990-08-02
JP2807032B2 (ja) 1998-09-30
EP0389922A2 (de) 1990-10-03
US5044277A (en) 1991-09-03
JPH02274542A (ja) 1990-11-08

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