EP0537114A1 - Unité d'encrage pour une machine d'impression - Google Patents

Unité d'encrage pour une machine d'impression Download PDF

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Publication number
EP0537114A1
EP0537114A1 EP92810759A EP92810759A EP0537114A1 EP 0537114 A1 EP0537114 A1 EP 0537114A1 EP 92810759 A EP92810759 A EP 92810759A EP 92810759 A EP92810759 A EP 92810759A EP 0537114 A1 EP0537114 A1 EP 0537114A1
Authority
EP
European Patent Office
Prior art keywords
front edge
ink fountain
duct roller
side walls
ink
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.)
Withdrawn
Application number
EP92810759A
Other languages
German (de)
English (en)
Inventor
Edwin Chrysanth Schmitt
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.)
KBA Notasys SA
Original Assignee
De la Rue Giori SA
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 De la Rue Giori SA filed Critical De la Rue Giori SA
Publication of EP0537114A1 publication Critical patent/EP0537114A1/fr
Withdrawn legal-status Critical Current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
    • B41F31/18—Inking arrangements or devices for inking selected parts of printing formes
    • 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

Definitions

  • the invention relates to an inking unit for a printing machine, in particular for receiving viscous ink, with a duct roller and an ink fountain with side walls, the front edge of which touches the circumference of the fountain roller and forms a radial ink fountain seal.
  • the side walls of the ink fountain have an arcuate front edge with a radius which is equal to the radius of the duct roller.
  • the side walls lie on their entire front edge on the circumference of the duct roller, and it was previously believed that this complete contact of the side walls on the duct roller would be necessary for a good radial ink fountain seal.
  • the present invention is based on the object of designing an ink fountain for a printing press in such a way that a good radial ink fountain seal is guaranteed even with a long operating time.
  • This object is achieved in that the front edge of the side walls of the ink fountain only abuts the duct roller in the areas of the inlet and the outlet, while the region in between this front edge does not touch the duct roller and forms a gap with it, the maximum width of which is only so large is dimensioned to prevent paint from escaping.
  • the maximum width of the gap can be chosen between 0.2 and 0.5 mm.
  • the maximum gap width is preferably chosen to be approximately 0.4 mm.
  • the front edge of the side walls expediently has different radii such that the radius in the area of the inlet and outlet is equal to that of the duct roller, while it is chosen to be smaller in the area in between.
  • the area of the inlet and outlet, which lie against the circumference of the duct roller, preferably extend over an angle of 5 ° to 20 °, in particular of approximately 15 °.
  • the inking device shown in FIG. 1 has two inking units arranged one above the other, as are used, for example, in intaglio printing machines.
  • This inking device has an inking unit carriage 5 with two superposed frames 6, in each of which an ink fountain 1, which consists of a base 3 and two side walls 2, and a duct roller 4 are installed.
  • the bottom 3 is formed by a doctor blade, the front edge of which defines a small adjustable gap with the circumference of the duct roller 4, which defines the thickness of the ink film transferred to the duct roller.
  • the stencil rollers 7 assigned to them are shown, which are inked by the duct roller 4 and ink on those not shown Intaglio printing plates of the plate cylinder 8 transferred to an intaglio printing machine.
  • the front edge of the side walls 2 of an ink fountain 1 lies only in the area of the inlet 2a and the outlet 2c on the circumference of the duct roller 4, while the region 2b between the front edge and the duct roller 4 forms a narrow, crescent-shaped gap, the maximum width of which is selected in dependence on the nature, in particular the viscosity, of the paint in such a way that the escape of paint is prevented. It has been found that, in general, in the presence of a gap width depending on the nature of the paint, with maximum values between 0.2 and approximately 0.5 mm, the viscosity and the gradual drying of the paint ensure a good seal.
  • the radius R1 of the front edge of the side walls 2 is equal to the radius of the duct roller 4, so that the inlet and outlet surfaces lie snugly against the circumference of the duct roller.
  • the intermediate central area 2b of the front edge is also curved in a circular arc, but has a somewhat smaller radius R2.
  • the areas of the inlet 2a and the outlet 2c can extend over an angle ⁇ or ⁇ of 5 ° to 20 °, preferably, as in the example considered, over approximately 15 °.
  • the radius R2 of the central region 2b of the front edge is chosen so much smaller than the radius of the duct roller 4 that the maximum gap width is approximately 0.4 mm.
  • the side walls of the ink fountain are preferably made of a self-lubricating polyamide plastic, as is known for example under the trade name Nylatron.
  • the invention is not limited to the exemplary embodiment shown, but rather allows for numerous variants with regard to the exact shape of the side walls of the ink fountain.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP92810759A 1991-10-11 1992-10-07 Unité d'encrage pour une machine d'impression Withdrawn EP0537114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2997/91 1991-10-11
CH299791 1991-10-11

Publications (1)

Publication Number Publication Date
EP0537114A1 true EP0537114A1 (fr) 1993-04-14

Family

ID=4246327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810759A Withdrawn EP0537114A1 (fr) 1991-10-11 1992-10-07 Unité d'encrage pour une machine d'impression

Country Status (6)

Country Link
US (1) US5230286A (fr)
EP (1) EP0537114A1 (fr)
JP (1) JPH05220937A (fr)
KR (1) KR930007648A (fr)
CN (1) CN1074407A (fr)
CA (1) CA2079141A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731003A1 (de) * 1997-07-18 1999-01-21 Roland Man Druckmasch Kurzfarbwerk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60002369T2 (de) 1999-01-20 2004-03-25 Kba-Giori S.A. Seitenwand einer Farbvorrichtung von eine Druckmaschine
CN104943356B (zh) * 2014-03-28 2018-03-20 南京造币有限公司 雕刻凹印输墨装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111141A1 (fr) * 1982-11-06 1984-06-20 Koenig & Bauer Aktiengesellschaft Coin de séparation de l'encre dans un encrier de rotative d'impression
EP0293586A2 (fr) * 1987-05-29 1988-12-07 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Encreur compartimenté pour machine à imprimer flexographique
EP0374092A1 (fr) * 1988-12-15 1990-06-20 De La Rue Giori S.A. Encrier pour machine d'impression

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382660A (en) * 1976-06-16 1983-05-10 Massachusetts Institute Of Technology Optical transistors and logic circuits embodying the same
DE3909878C1 (fr) * 1989-03-25 1990-08-02 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111141A1 (fr) * 1982-11-06 1984-06-20 Koenig & Bauer Aktiengesellschaft Coin de séparation de l'encre dans un encrier de rotative d'impression
EP0293586A2 (fr) * 1987-05-29 1988-12-07 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Encreur compartimenté pour machine à imprimer flexographique
EP0374092A1 (fr) * 1988-12-15 1990-06-20 De La Rue Giori S.A. Encrier pour machine d'impression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731003A1 (de) * 1997-07-18 1999-01-21 Roland Man Druckmasch Kurzfarbwerk
DE19731003B4 (de) * 1997-07-18 2004-07-01 Man Roland Druckmaschinen Ag Kurzfarbwerk

Also Published As

Publication number Publication date
KR930007648A (ko) 1993-05-20
CA2079141A1 (fr) 1993-04-12
US5230286A (en) 1993-07-27
CN1074407A (zh) 1993-07-21
JPH05220937A (ja) 1993-08-31

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