EP0428888B1 - Unité d'encrage avec dosage zonale de la quantité d'encre - Google Patents

Unité d'encrage avec dosage zonale de la quantité d'encre Download PDF

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Publication number
EP0428888B1
EP0428888B1 EP90120366A EP90120366A EP0428888B1 EP 0428888 B1 EP0428888 B1 EP 0428888B1 EP 90120366 A EP90120366 A EP 90120366A EP 90120366 A EP90120366 A EP 90120366A EP 0428888 B1 EP0428888 B1 EP 0428888B1
Authority
EP
European Patent Office
Prior art keywords
roller
inking unit
additional
inking
unit according
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
EP90120366A
Other languages
German (de)
English (en)
Other versions
EP0428888A3 (en
EP0428888A2 (fr
Inventor
Thomas 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 EP0428888A2 publication Critical patent/EP0428888A2/fr
Publication of EP0428888A3 publication Critical patent/EP0428888A3/de
Application granted granted Critical
Publication of EP0428888B1 publication Critical patent/EP0428888B1/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

Definitions

  • the present invention relates to an inking unit with an anilox roller and at least one inking unit roller with a resilient surface, which forwards the ink adopted by the anilox roller to a plate cylinder.
  • Such an inking unit is known from DE 17 61 715 C3.
  • an additional roller serving as a cleaning roller can be placed on the inking unit roller with a flexible surface.
  • the publication does not contain any indication that, and if necessary, how with the cleaning roller it is possible to dose the amount of ink to be transferred to the plate cylinder.
  • the object of the invention is to provide an inking unit in which the amount of ink to be transferred in the contact zone (transfer gap) of the inking unit roller can be metered by means of an additional roller.
  • an inking unit which has at least one additional roller which can be pressed onto at least one of the inking unit rollers with a resilient surface with a variable contact pressure.
  • the ink removed from an ink fountain 11 with the anilox roller 1 is first transferred to the inking roller 2 and transferred from the inking roller 2 to a plate cylinder 3, the anilox roller 1 being doctored with a doctor blade 12.
  • the amount of ink transferred during the ink transfer from one roller to another roller or another cylinder depends on the width of the contact zone of the rollers in contact.
  • the contact zone is also referred to as the printing zone, since the ink can only be transferred correctly from one roller to another roller by pressing one roller onto the other, and the pressure generated in the process is exerted on the ink within the contact zone. However, this pressing brings about an elastic deformation of the surface of one roller in the contact zone.
  • the inking unit has a device 5, by means of which the additional roller 4 can be placed against the inking roller 2 to different degrees.
  • the device 5 is essentially formed from a lever 7 rotatable about a fulcrum 6, on the end 10 of which, facing away from the fulcrum 6, the additional roller 4 is rotatably mounted, and a pressure piston 8.
  • the for example on the side walls of the printing unit pressure piston 8 is adjustable so that it presses the lever 7 and thus the additional roller 4 with a desired force on the inking roller 2 and so a certain deformation of the surface of the inking roller is achieved.
  • Fig. 2 shows a schematic representation of the deformation of the inking roller 2 by the adjacent anilox roller 1 with the auxiliary roller 4 applied without pressure.
  • the inking roller 2 formed from a steel core 13 and an elastic cover 14, such as a rubber cover, is deformed by the anilox roller 1 in a contact zone 15.
  • the deformation depends on its indentation depth and thus on the width of the contact zone 15 and on the regression, i.e. the decay of the deformation, depending on the elastic properties of the material of the cover 14.
  • the deformation subsides after an e-function and has completely subsided after a certain time, but at the latest until this zone meets again on the anilox roller 1.
  • the scope of the undeformed inking roller 2 is shown in dashed lines.
  • Fig. 3 shows a schematic representation of the deformation of the inking roller 2 by the adjacent anilox roller 1 with the additional roller 4 pressed in a first position.
  • the inking roller 2 is first deformed by the additional roller 4.
  • This deformation sounds within a certain time, ie based on the circumference of the inking roller, within a certain distance on the circumference of the roller.
  • the anilox roller 1 is arranged at a relatively short distance from the additional roller 4. It also causes a deformation of the inking roller 2.
  • the second deformation causes a smaller contact zone 16 than in the parked case of the additional roller 4 in FIG. 2.
  • FIG. 2 The extent of the undeformed inking roller 2 is shown in dashed lines. It can be seen from this illustration that the width of the contact zone 16 depends on the depth of the deformation previously generated by the additional roller 4.
  • Fig. 4 shows a schematic representation of the deformation of the inking roller 2 by the adjacent plate cylinder 3 when the additional roller 4 is pressed in a second position.
  • the inking roller 2 is first deformed by the additional roller 4. This deformation sounds within a certain time, ie based on the circumference of the inking roller, within a certain distance on the circumference of the roller.
  • the plate cylinder 3 is arranged at a relatively short distance from the additional roller 4. It also causes a deformation of the inking roller 2.
  • the second deformation does not have a full effect, so that a contact zone 17 is formed on the inking roller 2 with respect to the plate cylinder 3, which is not so is as wide as when the additional roller 4 is parked.
  • the circumference of the undeformed inking roller 2 is shown in broken lines in FIG. 4. It can be seen from this illustration that the width of the contact zone 17 depends on the depth of the deformation previously generated by the additional roller 4.
  • 5 and 6 each show a schematic representation of a second advantageous embodiment of the device for changeably pressing the additional roller 4 onto the inking roller 2.
  • the ink-transferring area of the inking roller 2 is divided into several zones, and accordingly a corresponding number of independently adjustable additional rollers 4 are employed on the inking roller 2, of which only two are shown.
  • the number of zones and thus the number of additional rollers 4 is freely selectable. Since each of the additional rollers 4 is held and turned on in the same way, the device for variably pressing the additional roller 4 becomes clear for the sake of being described in the following only for a single additional roller 4. 6 is referred to.
  • the additional roller 4 is rotatably mounted on the free ends of side legs of an essentially U-shaped roller carrier 18 to the inking roller 2 axially parallel.
  • the roller carrier 18 is in the interior of an essentially U-shaped cross member 22 which is fastened between the inking unit walls 20, 21 of the inking unit and runs parallel to the axis of the inking roller 2 by means of a bearing block 23 screwed between the two opposite side legs of the cross member 22 by one to the inking roller 2 Axially parallel axis 24 pivotally mounted.
  • the connecting the two side legs of the roller support 18 middle leg 19 is extended beyond the width of the side legs to one side so that it forms a two-armed, not necessarily right-angled, pivotable lever about the axis 24 together with the side legs.
  • the middle leg 19 is extended in such a direction that pressing the free end of this leg 19 causes the additional roller 4 to be pressed against the inking roller 2.
  • the pressing takes place by means of an adjusting screw 25 screwed through the middle leg of the crossmember 22. Screwing in the adjusting screw 25 increases the pressure of the additional roller 4 on the inking roller 2.
  • unscrewing the screw 25 has a lowering of the pressure for releasing the additional roller 4 from the surface of the inking roller 2, the required restoring force of the lever resulting from the weight of the additional roller 4.
  • the adjusting screw 25 shown in FIG. 4 can be operated either manually or automatically. If automatic actuation is provided, the adjusting screw 25 is advantageously to be replaced by a spindle which is driven by an electric motor, such as a stepper motor.
  • FIG. 7 shows a schematic representation of a further advantageous embodiment of the device for changeably pressing the additional roller 4 against the inking roller 2.
  • the additional roller 4 is attached to an eccentric 26 to the inking roller 2 so as to be rotatable about an axis 27 parallel to the axis.
  • the eccentric 26 is pivotally mounted in an eccentric bearing 28 to the inking roller 2 and can be pivoted by means of a pneumatic cylinder 29, which is connected to the eccentric 26 via a pull rod 30.
  • pivoting of the eccentric 26 causes the additional roller 4 to be pressed against the inking roller 2 or a lowering of the pressure until the additional roller 4 is released from the surface of the inking roller 2.
  • Fig. 8 shows the device shown in Fig. 7 in a partial sectional view. From this view it can be seen in particular that the pneumatic cylinder 29 is pivotally attached to the side wall 21 of the inking unit, for example by means of a bolt 31. The pneumatic cylinder 29 is controlled by means of a control device known per se and therefore not shown.
  • An inking unit according to the present invention has the advantage over the prior art of using a hard and therefore low-wear anilox roller and an inking roller with an elastic surface, i.e. inking unit rollers in generally customary embodiments .

Landscapes

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

Claims (8)

  1. Unité d'encrage, avec un cylindre de trame (1), avec au moins un cylindre d'encrage (2) à surface déformable qui transfère sur un cylindre de cliché (3) l'encre recueillie par le cylindre de trame (1), la surface du cylindre d'encrage (2) étant déformée par le cylindre de trame (1) et par le cylindre de cliché (3) dans une zone de contact respective (15 et 17), et avec un cylindre auxiliaire (4) qui peut être appuyé contre le cylindre d'encrage (2), caractérisée en ce que le cylindre auxiliaire (4), qui peut être appuyé contre le cylindre d'encrage (2) avec une force d'application variable, permet d'imprimer au cylindre d'encrage (2) une déformation préalable qui ne se résorbe au moins pas totalement jusqu'à l'atteinte de la zone de contact (15 ou 17), la largeur de la zone de contact (15 ou 17) pouvant, en modifiant la pression d'application du cylindre auxiliaire (4), être réglée conformément à la quantité d'encre à transférer.
  2. Unité d'encrage selon la revendication 1, caractérisée en ce que le ou les cylindres d'encrage (2) sont des cylindres applicateurs d'encre (2).
  3. Unité d'encrage selon la revendication 1 ou 2, caractérisée en ce qu'au moins un cylindre auxiliaire (4) est disposé avant la surface de contact du cylindre de trame (1) avec le cylindre d'encrage (2).
  4. Unité d'encrage selon la revendication 1 ou 2, caractérisée en ce qu'au moins un cylindre auxiliaire (4) est disposé avant la surface de contact du cylindre d'encrage (2) avec le cylindre de cliché (3).
  5. Unité d'encrage selon l'une quelconque des revendications 1 à 4, caractérisée par la juxtaposition de plusieurs cylindres auxiliaires (4) de la largeur d'une zone et individuellement applicables.
  6. Unité d'encrage selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins un cylindre auxiliaire (4) peut être pressé avec une pression d'application variable contre le cylindre d'encrage (2) par un dispositif (5) qui présente un levier (7) pouvant pivoter autour d'un pivot (6) et un piston de pression (8) agissant sur le levier (7), le cylindre auxiliaire (4) étant monté à rotation à une extrémité (10) du levier (7) opposée au pivot (6) et le piston de pression (8) étant articulé à un tourillon (9) situé entre le pivot (6) et l'extrémité (10) du levier (7).
  7. Unité d'encrage selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins un cylindre auxiliaire (4) peut être appliqué par un dispositif (5) présentant un porte-cylindre (18), qui est monté à pivotement autour d'un axe (24), au moyen d'un palier (23), dans une traverse (22) fixée entre des parois latérales (20, 21) de l'unité d'encrage et qui peut être pivoté autour de l'axe (24) au moyen d'une vis de réglage (35) agissant sur une branche centrale (19) du porte-cylindre.
  8. Unité d'encrage selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins un cylindre auxiliaire (4) peut être appliqué par un dispositif (5) qui présente un excentrique (26) monté à pivotement autour d'un palier d'excentrique (28), une barre de traction (30) et un vérin pneumatique (29) faisant pivoter l'excentrique (26) par l'intermédiaire de la barre de traction (30).
EP90120366A 1989-11-18 1990-10-24 Unité d'encrage avec dosage zonale de la quantité d'encre Expired - Lifetime EP0428888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938447 1989-11-18
DE3938447A DE3938447A1 (de) 1989-11-18 1989-11-18 Farbwerk mit zonaler dosierung der farbmenge

Publications (3)

Publication Number Publication Date
EP0428888A2 EP0428888A2 (fr) 1991-05-29
EP0428888A3 EP0428888A3 (en) 1991-09-11
EP0428888B1 true EP0428888B1 (fr) 1994-03-09

Family

ID=6393836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120366A Expired - Lifetime EP0428888B1 (fr) 1989-11-18 1990-10-24 Unité d'encrage avec dosage zonale de la quantité d'encre

Country Status (4)

Country Link
US (1) US5060571A (fr)
EP (1) EP0428888B1 (fr)
JP (1) JPH03169554A (fr)
DE (2) DE3938447A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2864224B2 (ja) * 1995-06-30 1999-03-03 株式会社東京機械製作所 インキ供給装置
JP3342876B2 (ja) * 1997-06-03 2002-11-11 ケーニツヒ ウント バウエル アクチエンゲゼルシヤフト ゴムライニングを備えたローラおよびゴムライニングを取り付けるための装置
DE102009052094A1 (de) 2008-12-05 2010-06-10 Heidelberger Druckmaschinen Ag Verfahren zur Feuchtmittelsteuerung in einer Druckmaschine
US9854839B2 (en) 2012-01-31 2018-01-02 Altria Client Services Llc Electronic vaping device and method
JP7380472B2 (ja) * 2020-07-29 2023-11-15 株式会社村田製作所 印刷装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741828C (de) * 1938-01-13 1943-11-17 Maschf Augsburg Nuernberg Ag Anilinfabrwerk
GB1230020A (fr) * 1967-06-30 1971-04-28
US3818830A (en) * 1972-05-15 1974-06-25 Int Machine Prod Inc Arrangement for supplying ink for a printing machine
DD113484A1 (fr) * 1974-04-15 1975-06-12
DE2856088A1 (de) * 1978-12-23 1980-07-03 Maschf Augsburg Nuernberg Ag Farbwerk
US4455938A (en) * 1979-05-22 1984-06-26 Graph Tech Inc. Dampening apparatus for lithographic press
FR2480627A1 (fr) * 1980-04-16 1981-10-23 Dcm Dispositif pour appliquer une couche d'enduction sur une bande de materiau circulant en continu
JPS58990B2 (ja) * 1980-11-07 1983-01-08 リョービ株式会社 印刷機のインキ及び水量自動調整装置
DE3046257C2 (de) * 1980-12-08 1984-02-16 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Lackiereinrichtung an Druckmaschinen
US4643090A (en) * 1985-02-26 1987-02-17 Harris Graphics Corporation Printing press and method
FR2590205A1 (fr) * 1985-11-21 1987-05-22 Seailles Tison Sa Dispositif pour l'encrage d'une forme d'impression rotative a partir d'une masse compacte d'encre a viscosite elevee
DE3704433A1 (de) * 1987-02-12 1988-08-25 Frankenthal Ag Albert Kurzfarbwerk
DE3706011A1 (de) * 1987-02-25 1988-09-08 Roland Man Druckmasch Kurzfarbwerk
DE3800411A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Farbwerk
US4798138A (en) * 1988-01-12 1989-01-17 Brodie George R Liquid distribution system

Also Published As

Publication number Publication date
US5060571A (en) 1991-10-29
EP0428888A3 (en) 1991-09-11
DE3938447C2 (fr) 1992-01-23
EP0428888A2 (fr) 1991-05-29
DE3938447A1 (de) 1991-05-23
DE59004894D1 (de) 1994-04-14
JPH03169554A (ja) 1991-07-23

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