EP0143240B1 - Inking unit for printing machines - Google Patents

Inking unit for printing machines Download PDF

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Publication number
EP0143240B1
EP0143240B1 EP84111165A EP84111165A EP0143240B1 EP 0143240 B1 EP0143240 B1 EP 0143240B1 EP 84111165 A EP84111165 A EP 84111165A EP 84111165 A EP84111165 A EP 84111165A EP 0143240 B1 EP0143240 B1 EP 0143240B1
Authority
EP
European Patent Office
Prior art keywords
roller
ink
bushings
inking unit
rollers
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
Application number
EP84111165A
Other languages
German (de)
French (fr)
Other versions
EP0143240A1 (en
Inventor
Rudi Junghans
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to AT84111165T priority Critical patent/ATE25355T1/en
Publication of EP0143240A1 publication Critical patent/EP0143240A1/en
Application granted granted Critical
Publication of EP0143240B1 publication Critical patent/EP0143240B1/en
Expired 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
    • B41F31/15—Devices for moving vibrator-rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/38—Means for axially reciprocating inking rollers

Definitions

  • the innovation relates to an inking unit for printing presses according to the preamble of claim 1.
  • DE-C 30 34 644 shows an inking unit in which four application rollers are driven by the associated friction rollers via spur gears and execute an axial movement via a drum curve arranged on the axis of the application rollers.
  • the wheat axis driven via the spur gear is to receive a differential speed from the application roller speed.
  • a single inking roller is implemented in an oscillating manner, which, viewed in the direction of rotation of the plate cylinder, is the last inking roller.
  • the purpose of the described design is to improve the stenciling behavior of an inking unit.
  • the object of the present invention is to improve an inking unit in a simple manner so that stenciling phenomena on the printing plate or the printed image are avoided if the plate cylinder is colored evenly.
  • the object is achieved by the features listed in the characterizing part of claim 1.
  • the differences in thickness of the ink film on the last inking roller that occur during stenciling are shifted so far compared to the other inking rollers by their axial movement that there are no longer any sharp contours and thus a stenciling effect on the finished printed image is no longer visible.
  • the side view shown in FIG. 1 is a normal offset printing unit for printing on a paper web 1 between two rubber cylinders 2, 3, which each interact with a plate cylinder 4, 5.
  • the upper half of the printing unit shown has a dampening unit 6 for moistening the printing plate arranged on the plate cylinder 4.
  • the inking unit 7, which is also shown, consists of an ink fountain 8, an ink fountain roller 9, a plurality of inking or friction rollers and the inking rollers 10, 11 and 12.
  • both the inking rollers 10 to 12 and the dampening roller 13 are mounted so that they can be lifted off the plate cylinder 4.
  • the rubber and plate cylinders are also turned off from one another in a known manner, so that their lateral surfaces are no longer in contact.
  • FIG. 2 shows an oscillating inking roller, which can be the last roller 12 seen in the direction of rotation of the plate cylinder 4.
  • the inking roller has a roller jacket 14 which is provided with an elastic coating 15, e.g. made of rubber, is covered.
  • the roller jacket 14 is rotatably and axially displaceably supported by needle bearings 16 with extended inner bushes 17 on a roller shaft 19 arranged in a rotationally fixed manner in bearings 18.
  • the bearings 18 are provided in the exemplary embodiment shown between the side frames 20 and 21 and serve to lift the inking roller 12 when the print is turned off.
  • bushings 22 are fastened within the roller shell 14 via clamping rings 23, which serve as a stop for the bush 24, which are arranged in the roller shell 14 via ball bearings 25.
  • compression springs 26 are provided between the bushes 22 and 24, which are dimensioned in their compressive force so that the inking roller 12 during the lateral stroke of the co-operating friction roller 27 follows this by the amount a, and in this position as long remains until the friction roller undergoes a reversal of movement in its respective dead center.
  • the respective compression spring 26 already initiates the return movement of the inking roller 12 into its starting position. The same is then carried to the other side until the bushes 24, 26 meet.
  • the inking roller 12 is therefore an asynchronous lateral movement to the rubbing roller 27, which prevents stenciling without an additional drive.

Landscapes

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

Abstract

An inking unit for printing machines wherein ink is fed in a metered fashion from an ink supply tank to inking rollers of the inking unit by which an ink film is applicable to a printing plate via a plurality of ink form rollers respectively in contact with a distributor roller and disengageable from a plate cylinder, the last of the plurality of form rollers, as viewed in rotational direction of the plate cylinder, being constructed so as to oscillate, including a roller shaft mounted so as to be fixed against rotation in bearings on the printing machine, the oscillating form roller having a casing with an outer cylindrical surface, the form roller casing being rotatably mounted on the roller shaft and being axially displaceable on the roller shaft for performing a stroke limited at both sides by respective pairs of bushings also mounted on the roller shaft, and including a respective compression spring disposed between the bushings of the respective pairs of bushings on each side of the oscillating form roller.

Description

Die Neuerung bezieht sich auf ein Farbwerk für Druckmaschinen gemäß dem Oberbegriff des anspruches 1.The innovation relates to an inking unit for printing presses according to the preamble of claim 1.

Die DE-C 30 34 644 (& EP-A-0 047 861) zeigt ein Farbwerk, bei dem vier Auftragwalzen von den zugehörigen Reibwalzen über Stirnräder angetrieben werden und über eine auf der Achse der Auftragwalzen angeordnete Trommelkurve eine axiale Bewegung ausführen. Die über das Stirnrad angetriebene Weizenachse soll hierbei eine Differenzdrehzahl zur Auftragwalzendrehzahl erhalten. In dieser Schrift ist auch erwähnt, daß eine einzelne Farbauftragwalze changierend ausgeführt ist, wobei es sich, in Drehrichtung des Plattenzylinders gesehen, um die letzte Farbauftragwatze handelt. Der Zweck der bescbriebenen Ausführung soll sein, das Schablonierverhalten einee Farbwerkes zu verbessern.DE-C 30 34 644 (& EP-A-0 047 861) shows an inking unit in which four application rollers are driven by the associated friction rollers via spur gears and execute an axial movement via a drum curve arranged on the axis of the application rollers. The wheat axis driven via the spur gear is to receive a differential speed from the application roller speed. In this document it is also mentioned that a single inking roller is implemented in an oscillating manner, which, viewed in the direction of rotation of the plate cylinder, is the last inking roller. The purpose of the described design is to improve the stenciling behavior of an inking unit.

Der Nachteil dieser Ausführung ist, daß es einen erheblichen baulichen Aufwand erforderlich macht, die vom Plattenzylindar abstellbaren Farbauftregwelzen über zusätzliche Stirnräder von den Reibwalzen aus anzutreiben, die Achsen dar Farbauftragweizen beiderseits mit drehbaren und verschwenkbaren Lagerungen zu versehen und innerhalb der Farbauftragwalzen Trommelkurven mit Kurvenrollen anzuordnen, um eine seitliche Bewegung desselben durchzuführen.The disadvantage of this design is that it requires a considerable amount of construction work to drive the ink pick-up rollers that can be switched off from the plate cylinder via additional spur gears from the distribution rollers, to provide the axes of the dye application wheat with rotatable and pivotable bearings on both sides and to arrange drum curves with cam rollers within the ink application rollers, to make a lateral movement of the same.

Aufgabe der vorliegenden Erfindung ist es, ein Farbwerk auf einfache Weise so zu verbessern, daß bei einem gleichmäßigen Einfärben des Plattenzylinders Schabloniererscheinungen auf der Druckplatte bzw. dem Druckbild vermieden werden.The object of the present invention is to improve an inking unit in a simple manner so that stenciling phenomena on the printing plate or the printed image are avoided if the plate cylinder is colored evenly.

Die Aufgabe wird durch die im Kennzeichen des Anspruches 1 aufgeführten Merkmale gelöst. Die beim Schablonieren auftretenden Dickenunterschiede des Farbfilms auf der letzten Farbauftragwalze werden durch deren axiale Bewegung soweit gegenüber den anderen Farbauftragwalzen verschoben, daß keine scharfen Konturen mehr gegeben sind und damit eine Schabioniererscheinung auf dem fertigen Druckbild nicht mehr sichtbar ist. Durch die weiche und freie Bewegung der Farbauftragwalze und durch den asynchronen Bewegungsablauf gegenüber der zugehörigen Reibwalze über die vorgesehenen Druckfedern wird der Ausgleich des Farbfilms verbessert und ein Verschleiß der Druckplatte vermieden. In der Praxis hat sich eine seitliche Bewegung der Farbauftragwalze von wenigen Millimetern als völlig ausreichend ergeben.The object is achieved by the features listed in the characterizing part of claim 1. The differences in thickness of the ink film on the last inking roller that occur during stenciling are shifted so far compared to the other inking rollers by their axial movement that there are no longer any sharp contours and thus a stenciling effect on the finished printed image is no longer visible. Due to the soft and free movement of the inking roller and the asynchronous movement compared to the associated friction roller via the compression springs provided, the compensation of the ink film is improved and wear on the printing plate is avoided. In practice, a lateral movement of the inking roller of a few millimeters has been found to be completely sufficient.

Ein Ausführungsbeispiel der Neuerung ist in den Zeichnungen schematisch dargestellt.An embodiment of the innovation is shown schematically in the drawings.

Es zeigt:

  • Fig. 1 eine Seitenansicht eines Farbwerkes,
  • Fig. 2 einen Teillängsschnitt durch die changierende Farbauftragwalze.
It shows:
  • 1 is a side view of an inking unit,
  • Fig. 2 shows a partial longitudinal section through the iridescent inking roller.

Bei der in Figur 1 dargestellten Seitenansicht handelt es sich um ein normales Offsetdruckwerk zum Bedrucken einer Papierbahn 1 zwischen zwei Gummizylindern 2, 3, die jeweils mit einem Plattenzylinder 4, 5 zusammenwirken. Die dargestellte obere Hälfte des Druckwerkes besitzt ein Feuchtwerk 6 zum Befeuchten der auf dem Plattenzylinder 4 angeordneten Druckplatte. Das weiterhin dargestellte Farbwerk 7 besteht aus einem Farbkasten 8, einer Farbkastenwalze 9, mehreren Farb- bzw. Reibwalzen und den Farbauftragwalzen 10, 11 und 12. Zum Druckabstellen sind sowohl die Farbauftragwalzen 10 bis 12 als auch die Feuchtauftragwalze 13 vom Plattenzylinder4 abhebbar gelagert. Hierbei werden in bekannter Weise auch die Gummi- und die Plattenzylinder voneinander abgestellt, so daß deren Mantelflächen nicht mehr in Berührung stehen.The side view shown in FIG. 1 is a normal offset printing unit for printing on a paper web 1 between two rubber cylinders 2, 3, which each interact with a plate cylinder 4, 5. The upper half of the printing unit shown has a dampening unit 6 for moistening the printing plate arranged on the plate cylinder 4. The inking unit 7, which is also shown, consists of an ink fountain 8, an ink fountain roller 9, a plurality of inking or friction rollers and the inking rollers 10, 11 and 12. For printing shutdown, both the inking rollers 10 to 12 and the dampening roller 13 are mounted so that they can be lifted off the plate cylinder 4. In this case, the rubber and plate cylinders are also turned off from one another in a known manner, so that their lateral surfaces are no longer in contact.

In Figur 2 ist eine changierende Farbauftragwalze dargestellt, bei der es sich um die in Drehrichtung des Plattenzylinders 4 gesehene letzte Walze 12 handeln kann. Die Farbauftragwalze besitzt einen Walzenmantel 14, der mit einem elastischen Überzug 15, z.B. aus Gummi, überzogen ist. Der Walzenmantel 14 ist über Nadellager 16 mit verlängerten Innenbüchsen 17 auf eine drehfest in Lagerungen 18 angeordnete Walzenachse 19 drehbar und axial verschiebbar gelagert. Die Lagerungen 18 sind im gezeigten Ausführungsbeispiel zwischen den Seitengestellen 20 und 21 vorgesehen und dienen dem Abheben der Farbauftragwalze 12 beim Abstellen des Druckes.FIG. 2 shows an oscillating inking roller, which can be the last roller 12 seen in the direction of rotation of the plate cylinder 4. The inking roller has a roller jacket 14 which is provided with an elastic coating 15, e.g. made of rubber, is covered. The roller jacket 14 is rotatably and axially displaceably supported by needle bearings 16 with extended inner bushes 17 on a roller shaft 19 arranged in a rotationally fixed manner in bearings 18. The bearings 18 are provided in the exemplary embodiment shown between the side frames 20 and 21 and serve to lift the inking roller 12 when the print is turned off.

Auf der Walzenachse 19 sind innerhalb des Walzenmantels 14 Büchsen 22 über Spannringe 23 befestigt, die als Anschlag für die Büchse 24 dienen, die über Kugellager 25 in dem Walzenmantel 14 angeordnet sind. Zwischen beiden Büchsen besteht bei Mittelstellung der Farbauftragwalze ein Abstand a von etwa 4mm, so daß die Farbauftragwalze 12 insgesamt einen seitlichen Hub von etwa 8mm ausführen kann.On the roller axis 19, bushings 22 are fastened within the roller shell 14 via clamping rings 23, which serve as a stop for the bush 24, which are arranged in the roller shell 14 via ball bearings 25. There is a distance a of approximately 4 mm between the two bushes when the inking roller is in the middle position, so that the inking roller 12 can carry out a total lateral stroke of approximately 8 mm.

Auf beiden Seiten der Farbauftragwalze 12 sind zwischen den Büchsen 22 und 24 Druckfedern 26 vorgesehen, die in ihrer Druckkraft so bemessen sind, daß die Farbauftragwalze 12 beim seitlichen Hub der mit ihr zusammenwirkenden Reibwalze 27 dieser um den Betrag a folgt, und in dieser Stellung solange verbleibt, bis die Reibwalze in ihrem jeweiligen Totpunkt eine Bewegungsumkehr erfährt. Sobald die seitliche Bewegung der Reibwalze 27 gegen 0 geht, leitet die jeweilige Druckfeder 26 bereits die Rückbewegung der Farbauftragswalze 12 in ihre Ausgangsstellung ein. Danach erfolgt die Mitnahme derselben zur anderen Seite hin, bis die Büchsen 24, 26 aufeinander treffen. Es handelt sich somit bei der Farbauftragwalze 12 um eine asynchrone seitliche Bewegung zur Reibwalze 27, die ohne zusätzlichen Antrieb ein Schablonieren verhindert.On both sides of the inking roller 12 compression springs 26 are provided between the bushes 22 and 24, which are dimensioned in their compressive force so that the inking roller 12 during the lateral stroke of the co-operating friction roller 27 follows this by the amount a, and in this position as long remains until the friction roller undergoes a reversal of movement in its respective dead center. As soon as the lateral movement of the friction roller 27 approaches 0, the respective compression spring 26 already initiates the return movement of the inking roller 12 into its starting position. The same is then carried to the other side until the bushes 24, 26 meet. The inking roller 12 is therefore an asynchronous lateral movement to the rubbing roller 27, which prevents stenciling without an additional drive.

Claims (2)

1. Inking unit for printing machines, particularly offset printing machines, in which in a metered fashion the ink is supplied from an ink supply tank (8) to the ink rollers of the inking unit (7) by which the ink film is applicable to the printing plate via a plurality of ink applicator rollers (10, 11, 12), each being in contact with a distributor roller (e.g. 27) and disengageable from the plate cylinder (4), whereby, viewed in direction of rotation of the plate cylinder (4), the last ink applicator roller (12) is constructed so as to oscillate,
wherein the roller casing (14) of the oscillating ink applicator roller (12) is mounted so as to be rotatable and, without a separate oscillating drive caused by the axial stroke movement of the distributor roller (27), axially displaceable on a roller axle (19) which is disposed in bearings (18) in an axially rigid manner and fixed against rotation,
the axial stroke is limited on either side by two bushings (22, 24) and
between the two bushings (22, 24) there is provided a compression spring (26) on each side of the roller.
2. Inking unit according to Claim 1,
wherein the roller casing (14) is mounted on the roller axle (19) via needle bearings (16) having extended inner bushings (17) and the respective bushing (24) disposed on the inside and braced by a compression spring (26) is rotatably mounted in the roller casing (14) via a ball bearing (25).
EP84111165A 1983-10-19 1984-09-19 Inking unit for printing machines Expired EP0143240B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111165T ATE25355T1 (en) 1983-10-19 1984-09-19 INKING UNIT FOR PRINTING PRESSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8330123U 1983-10-19
DE19838330123U DE8330123U1 (en) 1983-10-19 1983-10-19 INK FOR PRINTING MACHINES

Publications (2)

Publication Number Publication Date
EP0143240A1 EP0143240A1 (en) 1985-06-05
EP0143240B1 true EP0143240B1 (en) 1987-02-04

Family

ID=6758114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111165A Expired EP0143240B1 (en) 1983-10-19 1984-09-19 Inking unit for printing machines

Country Status (7)

Country Link
US (1) US4546701A (en)
EP (1) EP0143240B1 (en)
JP (1) JPS60101049A (en)
AT (1) ATE25355T1 (en)
AU (1) AU567368B2 (en)
CA (1) CA1222655A (en)
DE (2) DE8330123U1 (en)

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US4493257A (en) * 1983-10-25 1985-01-15 Harris Graphics Corporation Inker for a printing press
US4777877A (en) * 1986-05-02 1988-10-18 Airsystems Inc. Apparatus and method for oscillating the form rollers in a printing press
US4887533A (en) * 1986-05-02 1989-12-19 Airsystems Inc. Apparatus and method for oscillating the form rollers in a printing press
US4718344A (en) * 1986-05-02 1988-01-12 Lemaster Milton R Apparatus and method for oscillating the form rollers in a printing press
JPH0818428B2 (en) * 1986-06-30 1996-02-28 株式会社小森コーポレーション Ink device for printing machine
DE8626762U1 (en) * 1986-10-09 1986-11-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Dampening system for offset printing machines
DE3638826A1 (en) * 1986-11-13 1988-05-26 Roland Man Druckmasch STORAGE FOR CHANGING APPLICATION ROLLERS OF PRINTING MACHINES
US4785514A (en) * 1987-04-27 1988-11-22 Hh&L Co. Oscillating roller mounted on a fixed shaft
US4796530A (en) * 1987-06-01 1989-01-10 Pathfinder Graphic Associates Inc. Oscillating roll for printing presses
US4739703A (en) * 1987-10-28 1988-04-26 Komori Printing Machinery Co., Ltd. Inking apparatus for printing press with vibrating form roller
DE3773677D1 (en) * 1987-10-30 1991-11-14 Komori Corp., Tokio/Tokyo, Jp
DE3800658A1 (en) * 1988-01-13 1989-07-27 Kotterer Grafotec Device for applying ink and/or damping medium to a printing forme
CA1330636C (en) * 1988-10-07 1994-07-12 James R. Kemp Oscillating printing press roller and method for operating the same
US4901640A (en) * 1988-10-19 1990-02-20 Rockwell International Corporation Oscillating form roller dampener
DE3931291C1 (en) * 1989-09-20 1991-04-18 Koenig & Bauer Ag, 8700 Wuerzburg, De
DE3934070A1 (en) * 1989-10-12 1991-04-25 Miller Johannisberg Druckmasch CHANGING APPLICATION ROLLER OF A INK PRINTING MACHINE
DE4112158C2 (en) * 1991-04-13 1994-11-10 Roland Man Druckmasch Device for adjusting the axial stroke of a roller of a printing press
US5351614A (en) * 1991-11-05 1994-10-04 Rockwell International Corporation Self-oscillating roller assembly and method
DE10044860B4 (en) * 1999-09-29 2008-04-30 Heidelberger Druckmaschinen Ag Drive device for printing machines
DE10106528A1 (en) 2000-03-10 2001-09-13 Heidelberger Druckmasch Ag Mounting for a roller body at a rotary printing press has a rotating body with free rotation at the roller support structure as the roller axis with a friction torque transmission to the slower body on a rotary speed deviation
US6672206B2 (en) * 2002-01-04 2004-01-06 Graphic Specialists, Inc. Form roller for printing press
JP2007309508A (en) 2006-04-20 2007-11-29 Kinyosha Co Ltd Swing roller, rolling bearing and roller swinging method
US20090101033A1 (en) * 2007-10-23 2009-04-23 Byer Kevin T Oscillating ink form roller
FR2940177B1 (en) * 2008-12-24 2013-01-11 Goss Int Montataire Sa SUPPORT ASSEMBLY AND CORRESPONDING INK OR ANCHORING UNIT
DE102010042698B4 (en) * 2010-10-20 2014-12-18 Koenig & Bauer Aktiengesellschaft Arrangement of in a printing machine axially parallel to each other arranged rollers
AU2013214435A1 (en) * 2012-02-01 2014-08-21 Crown Packaging Technology, Inc. Container decoration
US20200055304A1 (en) * 2018-08-16 2020-02-20 Pacesetter Graphic Service Corporation Ink transfer roller with a removable hollow-core elastomer roller body on a reusable hanger shaft
MX2021005328A (en) 2018-11-09 2022-10-10 Ball Corp A metering roller for an ink station assembly of a decorator and a method of decorating a container with the decoration.

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US1533062A (en) * 1921-02-07 1925-04-07 Arthur J Daane Ink-distributing roller
US3625148A (en) * 1969-08-25 1971-12-07 Adamovske Strojirny Np Device for axially moving fluid-distributing rollers
DE2931141C3 (en) * 1979-08-01 1982-01-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Device for moving a distribution roller axially backwards
DE8015906U1 (en) * 1980-06-14 1980-09-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg DEVICE FOR AXIAL MOVING OF A INK ROLLER ON ROTATION PRINTING MACHINES
DE3034644C2 (en) * 1980-09-13 1982-10-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Inking unit with changing inking rollers

Also Published As

Publication number Publication date
JPS60101049A (en) 1985-06-05
CA1222655A (en) 1987-06-09
ATE25355T1 (en) 1987-02-15
DE3462316D1 (en) 1987-03-12
JPH0434500B2 (en) 1992-06-08
EP0143240A1 (en) 1985-06-05
AU567368B2 (en) 1987-11-19
AU3323884A (en) 1985-04-26
US4546701A (en) 1985-10-15
DE8330123U1 (en) 1984-01-12

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