EP1502741B1 - Dispositif de dosage de liquides pour une machine à imprimer - Google Patents

Dispositif de dosage de liquides pour une machine à imprimer Download PDF

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Publication number
EP1502741B1
EP1502741B1 EP04103100A EP04103100A EP1502741B1 EP 1502741 B1 EP1502741 B1 EP 1502741B1 EP 04103100 A EP04103100 A EP 04103100A EP 04103100 A EP04103100 A EP 04103100A EP 1502741 B1 EP1502741 B1 EP 1502741B1
Authority
EP
European Patent Office
Prior art keywords
roller
metering element
metering
edge
concave face
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.)
Not-in-force
Application number
EP04103100A
Other languages
German (de)
English (en)
Other versions
EP1502741A1 (fr
Inventor
Stephen Arthur c/o Heidelberger Austin
Kent Dirksen c/o Heidelberger Kasper
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.)
Goss International Americas LLC
Original Assignee
Goss International Americas LLC
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 Goss International Americas LLC filed Critical Goss International Americas LLC
Publication of EP1502741A1 publication Critical patent/EP1502741A1/fr
Application granted granted Critical
Publication of EP1502741B1 publication Critical patent/EP1502741B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F31/06—Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders

Definitions

  • the present invention relates to an apparatus and a method for liquid metering, e.g. for color dosing, according to the respective preamble of claims 1 and 9.
  • Such a device and such a method are known from US5003875 known.
  • the US3709147 describes another device and method.
  • Various devices for metering paint by means of a doctor are known from the prior art.
  • the squeegee is mostly used to influence the ink layer thickness on a ink-carrying roller, ie by adjusting the distance of the doctor edge of the roller surface, the thickness of the ink film to be produced is determined.
  • the in the US 3,037,451 The embodiment shown in FIG. 5 has a doctor blade 52 which is variable in distance with respect to the surface of the roller 53 and whose surface facing the roller 53 is flat. By means of the edge of the doctor blade 52 ink is doctored off from the surface of the roller 53 and thus determines the thickness of the ink film 55.
  • doctor blade 4 shows its planar design.
  • the doctor blade 4 has in the region of its doctor edge on a wedge-shaped portion 7 of small extent, which forms by abrasion in the blade edge.
  • an embodiment of a metering device shown in FIG. 9 has a surface 82 bent around the surface of a roller, which surface can be brought closer to the roller surface by means of a force-generating unit 85 for producing a thinner ink film by bending.
  • the device has no specially designed for color separation blade edge as compared to the other documents of the prior art In this embodiment, the color thickness adjustment due to the pressing is possible even without a blade edge formed in such a way.
  • a device for metering liquid for a substrate-processing machine with a rotating roller having a roller surface and a roller radius of curvature, wherein the roller surface carries a liquid film, and with a metering element, characterized in that the metering element has an edge for splitting the liquid film and one of the roller surface facing the first concave surface comprises and with respect to the roller surface is variable in distance.
  • the first concave surface preferably extends over a region of the metering element which is larger than the region of the edge of the metering element, in particular over substantially the entire extent of the metering element and / or over a (not negligible) arc range of the roller of z. B. more than about 1 or 2%.
  • the respective direction of said regions and said expansion is to be understood to be substantially parallel to the circumferential direction of the roll surface.
  • the edge of the metering element is preferably designed for improved color splitting, d. H. the edge is z. B. pointed, wedge-shaped or sharp-edged formed.
  • the color metering as a whole ie the production of a color layer of desired thickness, is considerably improved in the manner according to the invention.
  • the first concave surface causes better flow characteristics and reduces the pressure of the ink acting on the metering element.
  • the metering element preferably comprises a second concave surface opposite the first concave surface.
  • the two concave surfaces allow a further reduction of the prevailing pressure of the paint.
  • the second concave surface also serves the improved guidance of unneeded, derrakelter color.
  • the radius of curvature of the first concave surface preferably corresponds substantially to the radius of curvature of the roller.
  • the first concave surface may preferably correspond to an arc of 5 ° to 10 ° or more than 10 ° of the roll surface.
  • a not inconsiderable arc region of the roll surface is covered by the concave surface, which is substantially larger than an arc region of an edge region of the dosing element that arises only as a result of wear.
  • the metering element is preferably rigid and has a first lower surface which is preferably arranged horizontally to allow the liquid to flow back from the second concave surface into a reservoir.
  • the dosing element may e.g. be made of metal, such as stainless steel.
  • the liquid is preferably ink. However, it may be e.g. also dampening solution or another liquid used in the printing process (a so-called lithographic liquid) act.
  • a method according to the invention for dosing a liquid in a printing press in which liquid is supplied to a storage container and a roll is rotated on the surface of the roll to form a liquid film, is characterized in that the liquid film at one edge of a dosing element, which is one of the roll surface facing concave surface comprises, is split.
  • the surface speed of the roller preferably corresponds substantially to that of a plate or forme cylinder of the printing press.
  • the dosing element according to the invention with a concave surface advantageously enables roller speeds which correspond to the speed of the printing press.
  • Fig. 1 shows a schematic side view of a device 10 according to the invention for the supply and metering of liquid, for example of ink or fountain solution, in a printing press 30 with a plate or forme cylinder 32nd
  • the device 10 which here metering ink by way of example, comprises a paint reservoir 12, an ink fountain roller 14 for removing paint from the reservoir 12, and at least one metering element 20 (which may also be referred to as a doctor blade).
  • the ink fountain roller 14 includes a roller surface 16.
  • the metering element 20 comprises a first concave surface 22 facing the surface 16 and, as shown, may have a second concave surface 24 facing away from the first concave surface 22.
  • the first and the second concave Surface meet in an edge 36 (which can also be referred to as blade edge) on each other, the in Fig. 2 is shown in more detail.
  • the second concave surface 24 may open at its end facing away from the edge 36 in a flat bottom surface of the dosing element 20 facing the container 12, so that the color is e.g. in the form of drops 11 due to gravity in the container 12 is conveyed back.
  • the second concave surface 24 could also be flat or partially circular or have any other shape.
  • the metering element 20 is connected with respect to the ink fountain roller 14 by means of a controller 40, which may also be the control of the printing press 30, for adjusting a distance D between the outer surface 16 and the first concave surface 22 in terms of control technology.
  • the controller can be known adjustment mechanisms such. B. control motor-driven screws.
  • the first concave surface 22 may have a radius of curvature similar or substantially corresponding to the ink fountain roller radius, whereby the contact forces occurring at the metering element 20 are reduced.
  • the selected radius of curvature of the surface 22 is dependent on the radius of curvature of the ink fountain roller 14 and the usual operating distance D.
  • the distance D should be kept as constant as possible along the arc A, in which the surface 22 faces the surface 16 to those through the Fluid-induced pressure changes to minimize.
  • the radius of curvature of the ink fountain roller may be e.g. 6.35 cm (2.5 inches) and the radius of curvature of the concave surface, for example 6.36 cm (2.504 inches).
  • the radii of curvature preferably correspond to each other to within 10% or less.
  • the movement of the metering element 20 takes place in such a way that the edge 36 moves along a radial line 35 starting from the center of the roller 14.
  • the first concave surface 22 may be e.g. an arc A of about 5 ° or more correspond to the roll surface.
  • the ink film can be transferred to a reduction roller 40 containing a small amount of the ink, e.g. 1/100, the metered ink on the roller 14 on the (here represented by a single roller) Farbwalzenzug 50 transmits. From there, the ink is transferred to the plate or forme cylinder 32 of the printing machine 30.
  • Fig. 2 is a detailed illustration of the ink splitting at the metering element 20.
  • the concave surfaces 22 and 24 meet at the outermost end flat, for example 0.025 cm (0.010 inch) thick leading edge 36 wedge-shaped each other.
  • the color film is cleaved at the edge 36, so that a part of the color passes between the surface 16 and the concave surface 22 and another part of the color film 13 is conveyed away from the roller surface 16.
  • a generally linear velocity profile may arise, indicated by the reference character V, where the velocity at the fixed surface 22 is zero and the velocity at the moving surface 16 corresponds to the surface velocity of the roll 14.
  • the speed profile is made uniform throughout the thickness of the ink film, so that the speed of the ink film corresponds to the surface speed of the roller 14.
  • the thickness of the outgoing ink film after the metering element 20 decreases at a given distance setting D to half the thickness of the incoming color film.
  • a different value for the thickness of the liquid film after the concave surface may also result.
  • Such minor deviations are included here and are taken into account in the distance adjustment.
  • the linear velocity profile V can accordingly contribute to the outflowing Adjust film thickness, since their ratio to the distance D is substantially constant.
  • the dosing element 20 may be e.g. Made of stainless steel and is preferably rigid.
  • the flexibility of the edge 36 in the direction of the distance D is to be selected such that movements of the edge in this direction are within the tolerance range of the set film thickness to be produced.
  • the surface speed of the roller 14 may be substantially equal to the speed of the printing machine, i. the surface speed of the plate or forme cylinder 32 of e.g. 244 m / min (800 feet / min) or more
  • a plurality of adjacently arranged metering elements according to the invention can be provided along the roller 14.
  • the metering elements form ink zones that are individually adjustable in accordance with the axially different film thickness.
  • an edge cantilever-concave wedge-shaped metering element - in short: 3K metering element (ie at least one wedge surface is concave and runs out in an edge of the metering element), the dosage of the liquid can be significantly improved.
  • the supplied liquid film is first split at the edge and then precisely metered by the concave wedge surface, or their distance from a roller.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coating Apparatus (AREA)

Claims (11)

  1. Dispositif (10) de dosage de liquide pour une machine (30) traitant un support, avec un rouleau rotatif (14) doté d'une surface de rouleau (16) qui présente un rayon de courbure de rouleau, sachant que la surface de rouleau porte un film liquide (13), et avec un élément doseur (20),
    sachant que l'élément doseur (20) comporte une arête (36) pour la division du film liquide (13) et sa distance par rapport à la surface de rouleau (16) peut être modifiée,
    caractérisé en ce que l'élément doseur (20) comporte une première surface concave (22) tournée vers la surface de rouleau (16), et
    en ce que l'arête (36) peut être déplacée le long d'une ligne radiale partant du point central du rouleau (14).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément doseur (20) comporte une seconde surface concave (24) disposée en face de la première surface concave (22).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la première surface concave (22) présente un rayon de courbure correspondant sensiblement au rayon de courbure du rouleau (14).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la première surface concave (22) correspond à un arc d'environ 5 à 10° ou supérieur à 10° de la surface de rouleau (16).
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément doseur (20) est fabriqué de manière rigide et en particulier en acier spécial.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le liquide est de l'encre d'impression.
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur (D) du film liquide (13) après la division par l'élément doseur (20) correspond à peu près à la demi-distance moyenne entre la surface concave (22) et la surface de rouleau (16).
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il présente un rouleau réducteur (42), sur lequel peut être transférée l'encre du rouleau (16).
  9. Procédé de dosage d'un liquide dans une machine à imprimer (30) présentant les étapes suivantes :
    amenée de liquide à un réservoir de stockage (12),
    rotation d'un rouleau (14) pour la formation d'un film liquide (13) sur la surface (16) du rouleau (14)
    division du film liquide (13) sur une arête (36) d'un élément doseur (20),
    caractérisé en ce que l'élément doseur comporte une première surface concave (22) tournée vers la surface de rouleau (16), et par l'étape suivante :
    l'arête (36) est déplacée le long d'une ligne radiale partant du point central du rouleau (14).
  10. Dispositif selon la revendication 9, caractérisé en ce que la vitesse superficielle du rouleau (14) correspond sensiblement à la vitesse superficielle d'un cylindre porte-plaque ou porte-cliché (32) de la machine à imprimer (30).
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la première surface concave (22) présente un rayon de courbure correspondant sensiblement au rayon de courbure du rouleau (14).
EP04103100A 2003-07-28 2004-07-01 Dispositif de dosage de liquides pour une machine à imprimer Not-in-force EP1502741B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/628,652 US7546802B2 (en) 2003-07-28 2003-07-28 Fluid supply device for a printing machine
US628652 2003-07-28

Publications (2)

Publication Number Publication Date
EP1502741A1 EP1502741A1 (fr) 2005-02-02
EP1502741B1 true EP1502741B1 (fr) 2012-02-15

Family

ID=33541463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04103100A Not-in-force EP1502741B1 (fr) 2003-07-28 2004-07-01 Dispositif de dosage de liquides pour une machine à imprimer

Country Status (3)

Country Link
US (1) US7546802B2 (fr)
EP (1) EP1502741B1 (fr)
DE (1) DE102004032159A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4479748B2 (ja) * 2007-05-31 2010-06-09 Ｔｄｋ株式会社 液塗布装置

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801935A (en) * 1927-12-31 1931-04-21 Hoe & Co R Inking mechanism
US2232274A (en) * 1939-12-05 1941-02-18 Markem Machine Co Inking appliance for marking machines
US3037451A (en) * 1959-07-15 1962-06-05 William F Davis Means for dispensing and apportioning fluids
US3273535A (en) * 1964-10-06 1966-09-20 Rice Barton Corp Trailing-blade-coater including adjustable drag-blade
US3294060A (en) * 1966-03-21 1966-12-27 Donald B Mcintyre Fluid applicator
US3585932A (en) * 1968-06-07 1971-06-22 Wallace H Granger Automatic inking system for rotary newspaper printing press
US3664261A (en) * 1968-06-17 1972-05-23 Harold P Dahlgren Straight feed press
US3709147A (en) * 1970-12-03 1973-01-09 W Granger Ink transfer cylinder mounting with adjustable drive clutch
US4184429A (en) * 1972-02-09 1980-01-22 Max Datwyler & Co. Constant bevel doctor blade and method and apparatus using same
US4007682A (en) * 1974-04-24 1977-02-15 Xerox Corporation Reverse angle mounted ink-splitting doctor blade
NL156347B (nl) * 1975-04-03 1978-04-17 Heidelberger Druckmasch Ag Inktbak voor een drukmachine.
DE3033995C2 (de) * 1980-09-10 1984-11-22 Koenig & Bauer AG, 8700 Würzburg Einrichtung zur Erhaltung der Leichtgängigkeit von Dosierelementen in Farbkästen von Druckmaschinen
DE3217569C2 (de) * 1982-05-11 1985-11-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zum Dosieren der Farbe bei Offsetdruckmaschinen
JPS59169897A (ja) * 1983-03-17 1984-09-25 Toppan Printing Co Ltd 印刷版
US4615295A (en) * 1985-04-10 1986-10-07 Magna-Graphics Corporation Doctor blade apparatus for coating apparatus
DE3605613A1 (de) * 1986-02-21 1987-08-27 Jagenberg Ag Streichvorrichtung zum beschichten von warenbahnen
US5003875A (en) * 1989-03-13 1991-04-02 Adolph Coors Company Fountain roll and assembly for can decorating apparatus
DE3909878C1 (fr) * 1989-03-25 1990-08-02 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
EP0542635B1 (fr) * 1991-10-15 1999-06-09 Eastman Kodak Company Méthode pour l'enduction d'une dispersion magnétique et appareil comprenant des zones à hautes contraintes de cisaillement
DE4402226C2 (de) * 1994-01-27 1997-11-06 Voith Gmbh J M Rakelvorrichtung
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
DE19631301A1 (de) * 1996-08-02 1998-02-05 Gorter Cornelis Farbkammerrakel für eine Druckmaschine
DE10013876B4 (de) * 1999-04-08 2013-10-02 Heidelberger Druckmaschinen Ag Verfahren zum Regeln der Farbgebung beim Drucken mit einer Druckmaschine
JP3148750B1 (ja) * 1999-10-21 2001-03-26 株式会社東京機械製作所 印刷機用インキレール

Also Published As

Publication number Publication date
EP1502741A1 (fr) 2005-02-02
DE102004032159A1 (de) 2005-02-17
US20050022685A1 (en) 2005-02-03
US7546802B2 (en) 2009-06-16

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