EP0324140B1 - Dispositif d'encrage - Google Patents

Dispositif d'encrage Download PDF

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Publication number
EP0324140B1
EP0324140B1 EP88121338A EP88121338A EP0324140B1 EP 0324140 B1 EP0324140 B1 EP 0324140B1 EP 88121338 A EP88121338 A EP 88121338A EP 88121338 A EP88121338 A EP 88121338A EP 0324140 B1 EP0324140 B1 EP 0324140B1
Authority
EP
European Patent Office
Prior art keywords
inking unit
ink chamber
roll
doctor
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.)
Expired - Lifetime
Application number
EP88121338A
Other languages
German (de)
English (en)
Other versions
EP0324140A2 (fr
EP0324140A3 (en
Inventor
Norbert Köbler
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
Application filed by Albert Frankenthal AG filed Critical Albert Frankenthal AG
Publication of EP0324140A2 publication Critical patent/EP0324140A2/fr
Publication of EP0324140A3 publication Critical patent/EP0324140A3/de
Application granted granted Critical
Publication of EP0324140B1 publication Critical patent/EP0324140B1/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
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers
    • 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 invention relates to an inking unit according to the preamble of claim 1.
  • An inking unit of this type is known, for example, from US Pat. No. 4,590,855.
  • a circulating device is therefore required, which circulates the ink via the ink chamber.
  • the known arrangement proves to be not economical enough in cases with low ink consumption.
  • GB-A 991 792 shows an inking unit assigned to a flexographic printing press with an anilox roller which colors the soft flexographic printing plate. Two doctor blades are attached to these. However, these do not limit an ink chamber. Rather, the ink is made available in an open trough arranged underneath the anilox roller and is transferred from said trough to the anilox roller by means of an immersion roller, which is mounted with lateral journals in bearings that are not adjustable relative to the anilox roller. This prior publication therefore does not contain any useful information for avoiding the disadvantages of the generic arrangement.
  • Post-published EP-A 0 315 091 shows a chambered doctor blade with a roller provided in the ink chamber and interacting with the anilox roller.
  • the ink is in the ink chamber with overpressure.
  • the roller arranged in the ink chamber therefore does not function as a scoop roller, but merely as a calming device to avoid turbulence in the ink. This is circulated by a pump. There is therefore a comparatively large amount of color in circulation, which leads to poor economy with low ink consumption.
  • the roller is also provided with bearing journals penetrating the end walls of the ink chamber, which results in a voluminous construction.
  • the ink chamber only needs a pressurized ink filling up to a height that ensures that the scoop roller is acted upon. There is therefore no need for any pressurization of the ink chamber and for a color circulation. Rather, the color can be applied manually. Accordingly, the arrangement according to the invention manages with a minimal amount of ink and therefore proves to be extremely economical wherever small areas with low ink consumption have to be printed, for example in impression works. Nevertheless, the scoop roller provided in the ink chamber ensures complete, bubble-free filling of the cells of the anilox roller with ink. Another advantage of the measures according to the invention is that the storage of the anilox roller in the axial direction does not require any space.
  • the scoop roller can therefore advantageously also extend over the entire length of the respectively assigned ink chamber if a plurality of ink chambers are arranged next to one another over the length of the anilox roller.
  • the adjustability of the bearing shells also enables the scoop roller to be adjusted in accordance with the wear of the squeegee and thus ensures that the scoop roller is reliably in contact with the anilox roller, thereby ensuring complete, bubble-free operation Filling the cells of the anilox roller with ink is guaranteed over a long period of time.
  • the measures of claim 2 advantageously ensure automatic tracking and adjustment of the scoop roller to the associated anilox roller.
  • the measures of claim 5 ensure that the ink adhering to the scoop roller can be drawn into the gap between anilox roller and scoop roller and pulled apart at the same time, which brings about a particularly reliable inking of the anilox roller.
  • the features of claim 6 can be provided to bring about a forced drive of the scoop roller. These measures result in a strong structural simplification, in particular in the case of a plurality of ink chambers arranged side by side.
  • the scoop roller can expediently be designed as a metal roller.
  • 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.
  • Applicator roller 2 together with a dampening unit designated as a whole by 4.
  • the circumference of the anilox roller 3, which can have a metal core with a ceramic coating, is provided with cups 5 indicated in FIG. 1 and the webs 6 delimiting them. These cells 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 cells 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 7 arranged next to one another can be provided over the length of the anilox roller 3.
  • the use of a plurality of chamber doctor blade arrangements arranged side by side facilitates 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 FIGS. 2 and 3, one for fixed to the frame Carriers 8 receivable, bar-shaped doctor holder 9, on which two doctor blades 11 and 12 held in the direction of rotation of the associated anilox roller 3 and held by jaws 10 are accommodated.
  • the jaws 10 can be designed as clamping jaws, with the aid of which the respectively assigned doctor blade 11, 12 can be clamped onto a corresponding crank of the doctor holder 9.
  • the jaws 10, together with the respective offset of the doctor blade holder 9, are each intended to limit an insertion slot for the associated doctor blade 11 or 12.
  • the doctor blades can be loosely inserted in the respective assigned slot and can accordingly expand in the longitudinal direction in the event of heating, so that even with low contact forces there is no wave formation.
  • the two doctor blades 11, 12 offset from one another form the rear and front boundaries of an ink chamber 4 in the direction of rotation of the anilox roller 3, the radial boundaries of which are formed by the doctor holder 9 or the circumference of the anilox roller 3 immersed in the ink chamber 13.
  • the ink chamber 13 is closed on the face side by sealing jaws 27, which can be pressed against the ends of the doctor blades 11 and 12 by abutments 34.
  • the two doctor blades 11, 12 are here arranged symmetrically to a central longitudinal plane passing through the axis of the anilox roller 3 and are inclined toward one another in a roof shape. This symmetrical arrangement makes it possible to reverse the direction of rotation of the anilox roller 3 without changing the doctoring conditions.
  • the illustrated embodiment is a direction of rotation of the anilox roller 3 in a clockwise direction.
  • the doctor blade 11, which is at the rear in the direction of rotation of the anilox roller 3, lies against the anilox roller 3 with a positive angle of attack.
  • the doctor blade 12 in the direction of rotation of the anilox roller 3 has a negative angle of attack. Even in the case of a reversal of the direction of rotation, the doctor blade that is at the rear in the direction of rotation is negative and the doctor blade that is then at the front in the direction of rotation is set to be positive.
  • the doctor blade 12 which is positioned in the front in the direction of rotation, acts as the main or working doctor blade which, after the inking of the circumference of the anilox roller 3 has been colored, scrapes off the webs 6.
  • the paint stripped off can be returned to the ink chamber 13.
  • the scoop roller 42 in the ink chamber 13 delimited by the doctor blades 11, 12, which rests on the circumference of the anilox roller 3 over the entire length of the ink chamber 13.
  • the scoop roller 42 can be designed as a rubber or metal roller. In the illustrated embodiment, a steel version is used.
  • the scoop roller 42 ensures that the ink chamber 13 does not have to be completely filled with ink present under overpressure. Rather, a comparatively small filling of the ink chamber 13 is sufficient. Nevertheless, the scoop roller 42 ensures complete, bubble-free filling of the cells 5 of the anilox roller 3. Accordingly, there is comparatively little color in use, which results in good economy, particularly when producing smaller impression areas.
  • the scoop roller 42 extends over the entire length of the respectively assigned ink chamber 13 and rests with its end faces, as can best be seen from FIG. 3, on the sealing jaws 27 or on support plates 56 adjacent to them.
  • half-shells 43 are provided in the ink chamber 13, into which the scoop roller 42 is inserted with its circumference.
  • the half-shells 43 like the sealing jaws 27, can be adjusted in the radial direction with respect to the anilox roller 3, so that in any case a reliable contact of the scoop roller 42 on the anilox roller 3 can be achieved.
  • the half-shells 43 are guided in the region of their lateral edge strips by slotted pins 44 arranged in the doctor holder 9 and are gripped by an actuating device 45 which engages in the ink chamber 13 and can be actuated from the outside.
  • the pins 44 protrude into the undercut ink chamber 13, so that the width of the half-shells 43 can be adapted to the width of the narrowed chamber entrance, which facilitates assembly.
  • the actuating device 45 each has an extension pin 46 which engages on the assigned half-shell 43 and is gripped by an extension spring 47.
  • the extension spring is supported 47 on an externally actuated adjusting screw, which makes it possible to readjust the contact pressure acting on the scoop roller 42 in the event of doctor blade wear.
  • the scoop roller 42 inserted with its circumference into the half-shells 43 is driven in the exemplary embodiment shown by means of a drive motor 48 which is accommodated on the doctor blade holder 9 outside the ink chamber 13.
  • the drive motor 48 can be reversed so that the scoop roller 42 can be driven in every direction of rotation of the anilox roller 3 so that there are smooth movements in the contact area, so that the ink is drawn into the contact slot between the anilox roller 3 and scoop roller 42.
  • the peripheral speed of the scoop roller 42 is, however, significantly lower than the peripheral speed of the anilox roller 3 corresponding to the web speed.
  • the scoop roller 42 To drive the scoop roller 42, the latter is provided with a worm gear rim 49, which is arranged approximately in the middle and is cut into its circumference, into which a worm 50 arranged with an axis perpendicular to the axis of the scoop roller 42 engages in the ink chamber 13 led out drive shaft 51 is connected to the drive motor 48.
  • the shaft 51 is sealed against a pipe inserted into the doctor holder 9, to which the drive motor 48 can be flanged, by means of a sealing ring 52, which is gripped by a spring and bears against the lower end face of the upright screw 50.
  • the drive of the scoop roller 42 over one in its scope incised toothed ring also results in a simple construction in the case of a plurality of ink chambers 13 arranged side by side.
  • the groove 53 is connected to the ink chamber 13 via a drain hole 54, so that the ink doctored by the anilox roller 3 is returned to the ink chamber 13.
  • the scoop roller 42 provided in the ink chamber 13 ensures good mixing of the coming, possibly color contaminated with impurities causes new color.
  • a channel connected to the ink chamber 13 is also provided in the area of the opposite doctor blade 12, which serves as a pre-doctor in the opposite direction of rotation of the anilox roller 3, so that full reversibility is ensured.
  • the ink chamber 13 is depressurized, ie the ink is not under excess pressure.
  • a paint pump is therefore not required. Rather, the paint can be poured into the paint chamber 13.
  • a hopper 55 which is indicated on the left in FIG. 2 and is molded onto the doctor holder 9, is provided and is connected to the ink chamber 13.
  • the present arrangement accordingly works with comparatively little color, which leads to excellent economy in particular where only small areas are to be printed, for example in impression works.
  • doctor blade which acts as the main doctor blade in the direction of rotation of the anilox roller 3 is made negative.
  • both doctor blades with a negative angle of attack, provided the reversibility of the direction of rotation of the anilox roller 3 is dispensed with.

Claims (9)

  1. Dispositif d'encrage, et en particulier dispositif d'encrage court, destiné à des machines d'impression, et en particulier à des machines d'impression en offset, comprenant au moins un rouleau tramé (3) auquel est associé un dispositif racleur d'encrier (7) muni de deux lames de raclage (11, 12) qui sont décalées l'une par rapport à l'autre dans la direction circonférentielle du rouleau tramé (3), qui sont de préférence reçues sur un porte-racles (9) et qui délimitent un encrier (13) pouvant être alimenté en encre, caractérisé par le fait qu'il est prévu dans l'encrier (13) un rouleau de remontée de l'encre (42) reçu par son pourtour dans des demi-coquilles (43) qui sont disposées dans l'encrier (13) et qui peuvent être déplacées radialement par rapport au rouleau tramé (3).
  2. Dispositif d'encrage selon la revendication 1, caractérisé par le fait que les demi-coquilles (43) pénètrent par des rebords de guidage latéraux dans des rainures de guidage associées, et qu'elles sont en prise par-dessous avec un dispositif de réglage (45) qui est prévu dans le porte-racles (9) et qui comprend de préférence un piston de poussée (46) s appuyant sur un ressort (47).
  3. Dispositif d'encrage selon la revendication 2, caractérisé par le fait que le dispositif de réglage (45) comporte une vis de réglage qui peut être actionnée depuis l'extérieur et qui produit de préférence la contrainte initiale du ressort (47).
  4. Dispositif d'encrage selon l'une des revendications précédentes 2 et 3, caractérisé par le fait que les rainures de guidage sont prévues dans des tiges (44) qui font saillie dans l'encrier (13).
  5. Dispositif d'encrage selon l'une des revendications précédentes, caractérisé par le fait que le rouleau de remontée de l'encre (42) peut être entraîné de préférence à une vitesse plus faible par rapport à celle du rouleau tramé (3), et, de préférence, dans le même sens que le rouleau tramé (3).
  6. Dispositif d'encrage selon la revendication 5, caractérisé par le fait que le rouleau de remontée de l'encre (42) comporte une couronne dentée (49), de préférence sous la forme d'une couronne à vis sans fin, qui est taillée dans son pourtour et avec laquelle engrène une roue d'entraînement qui est prévue dans l'encrier (13), de préférence sous la forme d'une vis sans fin (50) dont l'axe s'étend perpendiculairement à l'axe du rouleau de remontée de l'encre (42) et qui est reliée, au moyen d'un arbre d'entraînement (51) rendu étanche, à un moteur d'entraînement (48) disposé à l'extérieur de l'encrier (13).
  7. Dispositif d'encrage selon la revendication 6, caractérisé par le fait que l'arbre d'entraînement (51) tourne dans une douille qui est posée sur le porte-racles (9) et qui porte de préférence le moteur d'entraînement (48), et qu'il est rendu étanche par rapport à celle-ci au moyen d'un joint d'étanchéité annulaire (52) avec lequel un ressort vient en prise par l'arrière.
  8. Dispositif d'encrage selon l'une des revendications précédentes, caractérisé par le fait que le rouleau de remontée de l'encre (42) est réalisé sous la forme d'un rouleau en métal.
  9. Dispositif d'encrage selon l'une des revendications précédentes, caractérisé par le fait que l'encrier (13) est muni d'une ouverture de remplissage (55).
EP88121338A 1988-01-09 1988-12-21 Dispositif d'encrage Expired - Lifetime EP0324140B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3800412A DE3800412A1 (de) 1988-01-09 1988-01-09 Farbwerk
DE3800412 1988-01-09

Publications (3)

Publication Number Publication Date
EP0324140A2 EP0324140A2 (fr) 1989-07-19
EP0324140A3 EP0324140A3 (en) 1990-08-08
EP0324140B1 true EP0324140B1 (fr) 1992-11-11

Family

ID=6344989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121338A Expired - Lifetime EP0324140B1 (fr) 1988-01-09 1988-12-21 Dispositif d'encrage

Country Status (4)

Country Link
US (1) US5005476A (fr)
EP (1) EP0324140B1 (fr)
JP (1) JP2828209B2 (fr)
DE (2) DE3800412A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401332A1 (de) * 1994-01-18 1995-07-20 Roland Man Druckmasch Verfahren und Vorrichtung zum Füllen von Vertiefungen, wie Näpfchen oder Rillen, auf der Mantelfläche eines rotierenden, zylindrischen Körpers

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8912194U1 (fr) * 1989-10-13 1989-11-23 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4012825A1 (de) * 1990-04-23 1991-10-24 Koenig & Bauer Ag Kammerrakel
DE4340128C2 (de) * 1993-11-25 1996-07-25 Koenig & Bauer Albert Ag Tiefdruckfarbwerk
GB9404455D0 (en) * 1994-03-08 1994-04-20 Mcmanamon David E Improvements in or relating to ink supply means for a printing machine
DE4438262C2 (de) * 1994-10-26 1996-09-05 Koenig & Bauer Albert Ag Rakeleinrichtung für ein Kurzfarbwerk einer Rotationsdruckmaschine
DE19642399B4 (de) * 1995-10-14 2004-04-15 Techno Roll Co., Ltd., Izumi Druckfarbenwannenanordnung für eine Druckerpresse
FR2758493B1 (fr) * 1997-01-17 1999-04-02 Soc Et De Machines Pour Les Ar Dispositif pour l'encrage d'un cylindre trame
DE19717727B4 (de) * 1997-04-26 2005-06-23 Man Roland Druckmaschinen Ag Farbwerk für eine Rotationsdruckmaschine
US6006665A (en) * 1997-10-30 1999-12-28 Didde Web Press Corporation Pliable anilox roller
ITMI20041693A1 (it) * 2004-09-02 2004-12-02 Gidue S P A Dispositivo di inchiostrazione per cilindro di stampa per stampa flessografica rotocalco o offset
US20090035037A1 (en) * 2006-03-09 2009-02-05 Broch Allan R Doctor blade chamber for high viscous ink
JP2008274512A (ja) 2007-04-03 2008-11-13 Nisshinbo Ind Inc 抗菌性ナノファイバー
US9475276B2 (en) 2011-04-27 2016-10-25 Stolle Machinery Company, Llc Can decorator machine, ink station assembly therefor, and can decorating method employing same
US11383509B2 (en) 2018-11-09 2022-07-12 Ball Corporation Metering roller for an ink station assembly of a decorator and a method of decorating a container with the decorator

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US3044396A (en) * 1959-01-02 1962-07-17 Carl Allers Ets Inking mechanism for intaglio printing machines
DE1240887B (de) * 1959-01-02 1967-05-24 Carl Allers Etabilssement As Farbwerk fuer eine Rotationstiefdruckmaschine
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DE1621909A1 (de) * 1966-07-01 1971-08-19 Fuji Photo Film Co Ltd Verfahren zum Aufbringen einer UEberzugsfluessigkeit auf die Oberflaeche einer sich kontinuierlich bewegenden Bahn
DE1611286A1 (de) * 1967-08-31 1970-04-02 Albert Schnellpressen Einfaerbevorrichtung fuer den Formzylinder von Tiefdruckmaschinen
US4165688A (en) * 1977-04-14 1979-08-28 Magna-Graphics Corporation Ink dam for printing press
US4186661A (en) * 1978-02-27 1980-02-05 Fmc Corporation Flexographic inking system including a reverse angle doctor blade
DE3117341C2 (de) * 1981-05-02 1988-07-07 Albert-Frankenthal Ag, 6710 Frankenthal Farbwerk
DE3320638C2 (de) * 1983-06-08 1986-10-16 Koenig & Bauer AG, 8700 Würzburg Farbabteileinrichtung an Farbkastenwalzen von Druckmaschinen
US4590855A (en) * 1984-06-18 1986-05-27 Printco Industries, Ltd. Reverse angle doctor blade assembly with stationary end seal
DE3505598C2 (de) * 1984-10-30 1986-08-14 Windmöller & Hölscher, 4540 Lengerich Spülfarbwerk mit geteilter Farbkammerrakel
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IT1186152B (it) * 1985-12-20 1987-11-18 Cerutti Spa Off Mec Gruppo di inchiostrazione a piu' colori per cilindri di stampa in una macchina rotativa
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JPS63269648A (ja) * 1987-04-27 1988-11-07 Fujitsu Ltd 回線トレ−ス編集制御方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401332A1 (de) * 1994-01-18 1995-07-20 Roland Man Druckmasch Verfahren und Vorrichtung zum Füllen von Vertiefungen, wie Näpfchen oder Rillen, auf der Mantelfläche eines rotierenden, zylindrischen Körpers

Also Published As

Publication number Publication date
US5005476A (en) 1991-04-09
DE3875946D1 (de) 1992-12-17
JPH01280560A (ja) 1989-11-10
EP0324140A2 (fr) 1989-07-19
DE3800412A1 (de) 1989-07-20
JP2828209B2 (ja) 1998-11-25
EP0324140A3 (en) 1990-08-08
DE3800412C2 (fr) 1989-11-23

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