EP0090179A1 - Means for preventing stripes on printing press rollers - Google Patents

Means for preventing stripes on printing press rollers Download PDF

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Publication number
EP0090179A1
EP0090179A1 EP83101844A EP83101844A EP0090179A1 EP 0090179 A1 EP0090179 A1 EP 0090179A1 EP 83101844 A EP83101844 A EP 83101844A EP 83101844 A EP83101844 A EP 83101844A EP 0090179 A1 EP0090179 A1 EP 0090179A1
Authority
EP
European Patent Office
Prior art keywords
roller
applicator
rollers
plate cylinder
gap
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.)
Granted
Application number
EP83101844A
Other languages
German (de)
French (fr)
Other versions
EP0090179B1 (en
Inventor
Janko Despot
Paul Abendroth
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
Priority to AT83101844T priority Critical patent/ATE20855T1/en
Publication of EP0090179A1 publication Critical patent/EP0090179A1/en
Application granted granted Critical
Publication of EP0090179B1 publication Critical patent/EP0090179B1/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
    • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B41F31/304—Arrangements for inking roller bearings, forks or supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings

Definitions

  • the invention relates to a device according to the preamble of the first claim.
  • the invention is therefore based on the object of providing storage for the rollers of a roller unit of a printing press, in which there is no increase in the pressure between the application roller and the roller interacting with it as a result of an impact acting on the application roller.
  • Such a device has the advantage that no increase in pressure can occur due to the fixed center distance of the two rollers. Another advantage is that the impact can be conducted into the machine frame or to another location on the roller mill where the impact of the impact can no longer affect the printing result.
  • the plate cylinder 1 has a cylinder channel 2, in which known means (not explained here) for fastening the pressure plate are provided.
  • an applicator roller 4 which is adjustable with respect to this and to a friction roller 5 is employed.
  • the friction roller 5 interacts with another roller designed as a scoop roller 6.
  • the applicator roller 4 is applied to the plate cylinder 1 with a defined contact pressure.
  • Application rollers are usually covered with an elastic layer such as rubber or the like.
  • the compressive stress existing between the plate cylinder 1 and the application roller 4 suddenly collapses and is also suddenly rebuilt when the start of printing 3 comes together with the application roller 4 '.
  • the resulting impact must now be absorbed in such a way that the compressive stress existing between applicator roller 4 and friction roller 5 does not change.
  • supports 12 are provided on the frame wall, in which pressure pieces 14 are arranged resiliently. These supports 12 and the pressure pieces are arranged so that they press on the journals 10 and 11 and press the applicator roller 4 and the friction roller 5 against each other.
  • the game is shifted in the bearing bores 8 and 9 so that the impact is passed directly into the frame wall 7.
  • the center distance between applicator roller 4 and friction roller 5 is thus precisely defined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Coating Apparatus (AREA)

Abstract

In a rotary printing machine, an arrangement for mounting an applicator roller and a preceding roller in a fluid feed stream journals the applicator roller and the preceding roller to the printing machine frame with substantial bearing play, and spring loads the applicator roller against the bearing surface away from the plate cylinder. On passing through the cylinder gap the applicator rollers of inking, damping or varnishing units in sheet-fed offset presses are jolted both at the start and end of the gap. The resulting different flattening of the soft applicator rollers causes roller marks, which should be avoided. For this purpose the applicator roller and the preceding roller are braced against each other by springs, so that their bearing play is eliminated and the distance between shafts is constant. This condition is also maintained on passage through the gap. Conveyance of liquid between applicator rollers and the preceding rollers is thus constant.

Description

Die Erfindung betrifft eine Vorrichtung entsprechend dem Oberbegriff des ersten Patentanspruchs.The invention relates to a device according to the preamble of the first claim.

Es ist bei Walzenwerken an Bogendruckmaschinen bekannt, daß die Auftragwalzen zuer exakten Übertragung von Farbe, Feuchtmittel oder Lack mit einem bestimmten Druck an den Plattenzylinder angestellt werden müssen. Gleichzeitig müssen die Auftragwalzen auch zu den übrigen mit ihnen in Kontakt stehenden Walzen des Walzenwerkes einstellbar gelagert sein.It is known in the case of roller mills on sheet-fed printing machines that the application rollers have to be turned on the plate cylinder with a certain pressure in order to transfer ink, dampening solution or lacquer precisely. At the same time, the applicator rollers must also be adjustable in relation to the other rollers of the roller mill that are in contact with them.

Durch den zwischen den Auftragwalzen und dem Plattenzylinder bestehende Anpreßdruck erfolgt infolge des Zylinderkanals während einer Plattenzylinderumdrehung ein doppelter Lastwechsel.Due to the contact pressure between the application rollers and the plate cylinder, a double load change occurs as a result of the cylinder channel during a plate cylinder revolution.

Durch diesen Lastwechsel und durch das vorhandene Lagerspiel ändert sich auch der Achsabstand und damit auch der Anpreßdruck zwischen der Auftragwalze und der mit ihr zusammenwirkenden Walze, die meist als Reibwalze ausgebildet ist. Dies bedeutet, daß sich die Kontaktfläche beider Walzen zyklisch ändert.This change in load and the existing bearing play also change the center distance and thus also the contact pressure between the applicator roller and the roller interacting with it, which is usually designed as a friction roller. This means that the contact area of both rollers changes cyclically.

Es hat sich gezeigt, daß sich insbesondere der am Druckanfang auftretende Lastwechsel besonders nachteilig auswirkt, denn der durch den Lastwechsel hervorgerufene Stoß ergibt eine größere Kontaktfläche infolge höherer Pressung und damit eine geringere Farb-, Feuchtmittel- oder Lackführung, was sich im Druckergebnis als Walzenstreifen niederschlägt. Dieser Stoß wird mit wachsender Maschinengeschwindigkeit verstärkt, so daß der Walzenstreifen besonders bei hohen Maschinengeschwindigkeiten zur Auswirkung kommt.It has been shown that, in particular, the load change occurring at the start of printing has a particularly disadvantageous effect, since the impact caused by the load change results in a larger contact area as a result of higher pressure and thus less ink, dampening solution or varnish guidance, which is reflected in the printing result as roller strips . This bump is growing with machines speed increased so that the roller strip is particularly effective at high machine speeds.

Dieser Nachteil ist jedoch nicht einfach durch eine Erhöhung des Anpreßdruckes zwischen Reib- und Auftragwalze ausgleichbar, denn es kommt dann zu einer Abplattung der Auftragwalze während des Maschinenstillstandes an der Kontaktstelle beider Walzen.However, this disadvantage cannot be compensated for simply by increasing the contact pressure between the friction roller and the application roller, since the application roller then becomes flattened during the machine standstill at the contact point of the two rollers.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Lagerung für die Walzen eines Walzenwerkes einer Druckmaschine zu schaffen, bei der infolge eines auf die Auftragwalze wirkenden Stoßes keine Zunahme der Pressung zwischen Auftragwalze und der mit ihr zusammenwirkenden Walze erfolgt.The invention is therefore based on the object of providing storage for the rollers of a roller unit of a printing press, in which there is no increase in the pressure between the application roller and the roller interacting with it as a result of an impact acting on the application roller.

Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem Kennzeichen des ersten Patentanspruchs.This object is achieved by a device according to the characterizing part of the first claim.

Eine derartige Vorrichtung hat den Vorteil, daß durch den festgelegten Achsabstand beider Walzen keine Zunahme der Pressung erfolgen kann. Weiterhin ist von Vorteil, daß der Stoß in das Maschinengestell leitbar ist bzw. an eine andere Stelle des Walzenwerkes, an der sich die Auswirkungen des Stoßes nicht mehr auf das Druckergebnis auswirken können.Such a device has the advantage that no increase in pressure can occur due to the fixed center distance of the two rollers. Another advantage is that the impact can be conducted into the machine frame or to another location on the roller mill where the impact of the impact can no longer affect the printing result.

Nachfolgend ist die Erfindung an einem Ausführungsbeispiel näher erläutert.

  • Fig. 1 zeigt schematisch einen Plattenzylinder und ein Walzenwerk.
  • Fig. 2 zeigt einen Ausschnitt des Walzenwerkes mit schematisch dargestellten Vorrichtungen zum Spielfreimachen der Lagerung.
The invention is explained in more detail below using an exemplary embodiment.
  • Fig. 1 shows schematically a plate cylinder and a roller mill.
  • Fig. 2 shows a section of the roller mill with schematically illustrated devices for clearance clearance of the storage.

Der Plattenzylinder 1 weist einen Zylinderkanal 2 auf, in dem bekannte und hier nicht näher erläuterte Mittel zum Befestigen der Druckplatte vorgesehen sind. An den Plattenzylinder 1 ist eine zu diesem und zu einer Reibwalze 5 einstellbare Auftragwalze 4 angestellt. Die Reibwalze 5 wirkt mit einer weiteren als Schöpfwalze 6 ausgebildeten Walze zusammen.The plate cylinder 1 has a cylinder channel 2, in which known means (not explained here) for fastening the pressure plate are provided. On the plate cylinder 1, an applicator roller 4 which is adjustable with respect to this and to a friction roller 5 is employed. The friction roller 5 interacts with another roller designed as a scoop roller 6.

Für eine gute Übertragung des durch die Walzen 4, 5, u. 6 geforderten Mediums ist die Auftragwalze 4 mit einem definierten Anpreßdruck an den Plattenzylinder 1 angestellt. Üblicherweise sind Auftragwalzen mit einer elastischen Schicht wie Gummi oder dgl. überzogen. Während der Rotation des Plattenzylinders 1 bricht infolge des Zylinderkanals 2 die zwischen Plattenzylinder 1 und Auftragwalze 4 bestehende Druckspannung schlagartig zusammen und wird, wenn der Druckanfang 3 mit der Auftragwalze 4 'zusammen kommt ebenso schlagartig wieder aufgebaut. Der hieraus resultierende Stoß muß nun so aufgefangen werden, daß sich die zwischen Auftragwalze 4 und Reibwalze 5 bestehende Druckspannung nicht verändert.For a good transfer of the through the rollers 4, 5, u. 6 required medium, the applicator roller 4 is applied to the plate cylinder 1 with a defined contact pressure. Application rollers are usually covered with an elastic layer such as rubber or the like. During the rotation of the plate cylinder 1, as a result of the cylinder channel 2, the compressive stress existing between the plate cylinder 1 and the application roller 4 suddenly collapses and is also suddenly rebuilt when the start of printing 3 comes together with the application roller 4 '. The resulting impact must now be absorbed in such a way that the compressive stress existing between applicator roller 4 and friction roller 5 does not change.

Hierzu sind an der Gestellwand 7 Stützen 12 vorgesehen, in welchen Druckstücke 14 federnd angeordnet sind. Diese Stützen 12 und die Druckstücke sind dabei so angeordnet, daß sie auf die Lagerzapfen 10 und 11 drücken und die Auftragwalze 4 und die Reibwalze 5 gegeneinander drücken. Dabei wird das Spiel in den Lagerbohrungen 8 und 9 so verlagert, daß der Stoß direkt in die Gestellwand 7 geleitet wird. Der Achsabstand zwischen Auftragwalze 4 und Reibwalze 5 wird somit exakt festgelegt.For this purpose, supports 12 are provided on the frame wall, in which pressure pieces 14 are arranged resiliently. These supports 12 and the pressure pieces are arranged so that they press on the journals 10 and 11 and press the applicator roller 4 and the friction roller 5 against each other. The game is shifted in the bearing bores 8 and 9 so that the impact is passed directly into the frame wall 7. The center distance between applicator roller 4 and friction roller 5 is thus precisely defined.

Sollte sich der Stoß zwischen Reibwalze 5 und Schöpfwalze 6 auswirken ist eine Beeinflussung des Druckbildes nicht mehr möglich, da zwischen Auftragwalze 4 und Reibwalze 5 eine Verreibung stattfindet.If the impact between the friction roller 5 and the scoop roller 6 has an effect, it is no longer possible to influence the printed image, since rubbing takes place between the application roller 4 and the friction roller 5.

Claims (3)

1.) Vorrichtung zum Verhindern von Walzenstreifen an Walzenwerken einer Druckmaschine, bei der ein Medium wie Farbe, Feuchtmittel und Lack über eine am Umfang elastische Auftragwalze des Walzenwerks einem Plattenzylinder zuführbar ist,
dadurch gekennzeichnet, daß Auftragwalze (4) und vorgeschaltete Walze (5) durch auf deren Lagerzapfen (9, 10) wirkende, durch die Kraft von Federn (13) betätigte Druckstücke (14) gegeneinander drückbar sind, wobei die Federkraft so hoch ausgelegt ist, daß das Lagerspiel in den Lagerbohrungen (8, 9) auch beim Stoß auf die Auftragwalze (5) infolge Durchganges des Plattenzylinderdruckanfangs auf die gegenüberliegende Seite verlagert ist.1.) Device for preventing roller strips on roller mills of a printing press, in which a medium such as ink, dampening solution and varnish can be fed to a plate cylinder via an elastic application roller of the roller mill,
characterized in that applicator roller (4) and upstream roller (5) can be pressed against one another by thrust pieces (14) acting on their bearing journals (9, 10) and actuated by the force of springs (13), the spring force being designed so high, that the bearing play in the bearing bores (8, 9) is shifted to the opposite side even when it strikes the applicator roller (5) due to the passage of the plate cylinder pressure start. 2.) Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Federn (13) in an der Gestellwand (7) angeordneten Stützen (12) abgestützt sind.2.) Device according to claim 1, characterized in that the springs (13) in the frame wall (7) arranged supports (12) are supported. 3.) Vorrichtung nach Anspruch 1 und 2, dadurch daß Auftragwalze (4) und vorgeschaltete Walze (5) in einem gemeinsamen Hebel gelagert sind.3.) Device according to claim 1 and 2, characterized in that applicator roller (4) and upstream roller (5) are mounted in a common lever.
EP83101844A 1982-03-26 1983-02-25 Means for preventing stripes on printing press rollers Expired EP0090179B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101844T ATE20855T1 (en) 1982-03-26 1983-02-25 DEVICE FOR PREVENTING ROLLER STRIPS ON ROLLER MILLS OF A PRINTING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823211154 DE3211154A1 (en) 1982-03-26 1982-03-26 DEVICE FOR PREVENTING ROLLER STRIPS ON ROLLING MACHINES OF A PRINTING MACHINE
DE3211154 1982-03-26

Publications (2)

Publication Number Publication Date
EP0090179A1 true EP0090179A1 (en) 1983-10-05
EP0090179B1 EP0090179B1 (en) 1986-07-23

Family

ID=6159371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101844A Expired EP0090179B1 (en) 1982-03-26 1983-02-25 Means for preventing stripes on printing press rollers

Country Status (5)

Country Link
US (1) US4495863A (en)
EP (1) EP0090179B1 (en)
JP (1) JPS5981173A (en)
AT (1) ATE20855T1 (en)
DE (2) DE3211154A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013462A1 (en) * 1990-04-27 1991-11-07 Heidelberger Druckmasch Ag DEVICE FOR LACQUERING PRINTED SHEETS ON PRINTING MACHINES
DE19610466C2 (en) * 1996-03-16 2000-12-28 Roland Man Druckmasch Storage for a roller in a printing press
FR2755057B1 (en) * 1996-10-25 1999-01-15 Heidelberg Harris Sa DEVICE FOR SUPPORTING ROLLERS AGAINST ROTATING SURFACES
DE19816659B4 (en) 1997-05-26 2005-04-07 Heidelberger Druckmaschinen Ag Method and device for protection against the penetration of foreign bodies into a nip
DE10057571B4 (en) * 1999-12-16 2012-01-26 Heidelberger Druckmaschinen Ag Method for cylinder adjustment and printing machines for carrying out the method
EP1515853A1 (en) 2002-06-11 2005-03-23 MAN Roland Druckmaschinen AG Application device for a printing/painting unit in a processing machine
DE102007059335A1 (en) 2007-12-07 2009-06-10 Manroland Ag Applicator with a forme cylinder and at least one applicator roll in a processing machine
CN103978781A (en) * 2014-05-09 2014-08-13 新乡市新机创新机械有限公司 Ink fountain flip balancing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069157B (en) * 1959-11-19 Roland Offsetmascbinenfabrik Faber &. Schleicher Aktiengesellschaft, Offenbach/M Form roller bearings for printing machines
DE1205984B (en) * 1964-05-08 1965-12-02 Maschf Augsburg Nuernberg Ag Method for preventing the formation of water streaks on the printed matter of rotary offset sheet-fed printing machines
GB1158757A (en) * 1966-03-31 1969-07-16 Gillette France S A Bearing Arrangement for a Pair of Shafts Carrying Co-operating Rolls
DE1611302A1 (en) * 1968-01-27 1970-12-10 Schnellpressenfabrik Keonig & Storage of the blanket cylinder of offset printing machines
DE2736175A1 (en) * 1977-08-11 1979-02-22 Koenig & Bauer Ag Printing mechanism for offset rotary press - has elements storing mechanical energy or delivering power mounted between dowel pins of neighbouring cylinders

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE286057C (en) *
US287383A (en) * 1883-10-23 kendall
US444231A (en) * 1891-01-06 Apparatus for printing in colors
US423394A (en) * 1890-03-11 saxton
US1040268A (en) * 1909-06-25 1912-10-08 Multi Color Attachment Company Color-printing attachment for printing-presses.
FR558366A (en) * 1922-11-07 1923-08-27 Schwarz Maschb Ges M B H Geb Rotary printing machines
FR2230502B1 (en) * 1973-05-21 1978-12-01 Ibm
DE2902229A1 (en) * 1979-01-20 1980-07-24 Maschf Augsburg Nuernberg Ag DEVICE FOR SUPPLYING LIQUID TO THE PLATE CYLINDER OF A PRINTING MACHINE
DE2932887C2 (en) * 1979-08-14 1982-04-22 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Rotary printing machine with a device for preventing cylinder movements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069157B (en) * 1959-11-19 Roland Offsetmascbinenfabrik Faber &. Schleicher Aktiengesellschaft, Offenbach/M Form roller bearings for printing machines
DE1205984B (en) * 1964-05-08 1965-12-02 Maschf Augsburg Nuernberg Ag Method for preventing the formation of water streaks on the printed matter of rotary offset sheet-fed printing machines
GB1158757A (en) * 1966-03-31 1969-07-16 Gillette France S A Bearing Arrangement for a Pair of Shafts Carrying Co-operating Rolls
DE1611302A1 (en) * 1968-01-27 1970-12-10 Schnellpressenfabrik Keonig & Storage of the blanket cylinder of offset printing machines
DE2736175A1 (en) * 1977-08-11 1979-02-22 Koenig & Bauer Ag Printing mechanism for offset rotary press - has elements storing mechanical energy or delivering power mounted between dowel pins of neighbouring cylinders

Also Published As

Publication number Publication date
DE3364596D1 (en) 1986-08-28
ATE20855T1 (en) 1986-08-15
JPS5981173A (en) 1984-05-10
EP0090179B1 (en) 1986-07-23
JPH0218986B2 (en) 1990-04-27
US4495863A (en) 1985-01-29
DE3211154A1 (en) 1983-10-06

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