EP0090179B1 - 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
EP0090179B1
EP0090179B1 EP83101844A EP83101844A EP0090179B1 EP 0090179 B1 EP0090179 B1 EP 0090179B1 EP 83101844 A EP83101844 A EP 83101844A EP 83101844 A EP83101844 A EP 83101844A EP 0090179 B1 EP0090179 B1 EP 0090179B1
Authority
EP
European Patent Office
Prior art keywords
roller
applicator
rollers
application roller
upstream
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
EP83101844A
Other languages
German (de)
French (fr)
Other versions
EP0090179A1 (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.
  • a device of this type is known from DE-B-1 069 157.
  • this device is provided to arrange roller bearings on the steering knuckle of an application roller, on which force-acting pressure elements act, one pressure element pressing the application roller in the direction of an upstream grater and the other pressure element in the direction of a forme cylinder.
  • the pressure elements are independent of each other. Impacts introduced by the forme cylinder onto the application roller inevitably cause an indentation on the circumference of the application roller.
  • GB-A-1 158 757 discloses a rolling mill with rolls arranged at precisely precise intervals.
  • a resilient support is provided for the upper roller, which is acted upon by a pair of springs.
  • the lower roller is fixed. The impact to be caught on the two rollers is not brought up to them from the outside, but the impact occurs through a material that is passed between these rollers.
  • the invention has for its object to provide a bearing for the rollers of a roll mill of a printing press, in which there is no increase in the pressure between the application roller and the roller interacting with it due to a shock 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. It is also advantageous that the impact can be conducted into the machine frame or to another location on the roller mill where the impact of the impact no longer affects 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 application roller 4 is employed with a defined contact pressure on the plate cylinder 1.
  • Application rollers are usually covered with an elastic layer such as rubber or the like.
  • These supports 12, 12 'and the pressure pieces 14, 14' are arranged so that they press on the trunnions 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 machine frame 7.
  • the center distance between applicator roller 4 and friction roller 5 is thus precisely defined.
  • Applicator roller and upstream roller can be mounted in a common lever.

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.

Eine Vorrichtung dieser Gattung ist durch die DE-B-1 069 157 bekannt. Bei dieser Vorrichtung ist vorgesehen, auf dem Achsschenkel einer Auftragwalze Wälzlager anzuordnen, auf die kraftschlüssig wirkende Andrückelemente einwirken, wobei das eine Andrückelement die Auftragwalze in Richtung eines vorgeordneten Reibers und das andere Andrückelement in Richtung eines Formzylinders drückt. Die Andrückelemente sind unabhängig voneinander. Vom Formzylinder auf die Auftragwalze eingeführte Stöße bewirken zwangsläufig ein Eindrücken am Umfang der Auftragwalze.A device of this type is known from DE-B-1 069 157. In this device, it is provided to arrange roller bearings on the steering knuckle of an application roller, on which force-acting pressure elements act, one pressure element pressing the application roller in the direction of an upstream grater and the other pressure element in the direction of a forme cylinder. The pressure elements are independent of each other. Impacts introduced by the forme cylinder onto the application roller inevitably cause an indentation on the circumference of the application roller.

Es ist auch bei Walzenwerken an Bogendruckmaschinen bekannt, daß die Auftragwalzen zur 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 also 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 for the exact transfer of ink, dampening solution or lacquer. 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 bestehenden 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-, Feuchtmitteloder Lackführung, wassich 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 impact is increased with increasing machine speed, 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.

Durch die GB-A-1 158 757 ist ein Walzwerk mit in exakt genauen Abständen angeordneten Walzen bekannt. Es ist eine federnde Stütze für die obere Walze vorgesehen, auf die ein Paar von Federn einwirken. Die untere Walze ist fest gelagert. Der aufzufangende Stoß auf die beiden Walzen wird nicht von außen an sie herangeführt, sondern der Stoß erfolgt durch ein zwischen diesen Walzen hindurchgeführtes Material.GB-A-1 158 757 discloses a rolling mill with rolls arranged at precisely precise intervals. A resilient support is provided for the upper roller, which is acted upon by a pair of springs. The lower roller is fixed. The impact to be caught on the two rollers is not brought up to them from the outside, but the impact occurs through a material that is passed between these rollers.

Der Erfindung liegt 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 has for its object to provide a bearing for the rollers of a roll mill of a printing press, in which there is no increase in the pressure between the application roller and the roller interacting with it due to a shock 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 ausSuch a device has the advantage that no increase in pressure can occur due to the fixed center distance of the two rollers. It is also advantageous that the impact can be conducted into the machine frame or to another location on the roller mill where the impact of the impact no longer affects the printing result

Nachfolgend ist die Erfindung an einem Ausführungsbeispielnäher 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 dem 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. 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.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. For a good transfer of the through the rollers 4, 5 u. 6. Required medium, the application roller 4 is employed with a defined contact pressure on the plate cylinder 1. Application rollers are usually covered with an elastic layer such as rubber or the like. During the rotation of the plate cylinder 1, the pressure existing between the plate cylinder 1 and the application roller 4 suddenly collapses as a result of the cylinder channel 2 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 am Maschinengestell 7 Stützen 12, 12' vorgesehen, in welchen Druckstücke 14, 14' über Federn 13, 13' federnd angeordnet sind. Diese Stützen 12, 12' und die Druckstücke 14, 14' 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 das Maschinengestell 7 geleitet wird. Der Achsabstand zwischen Auftragwalze 4 und Reibwalze 5 wird somit exakt festgelegt.For this purpose, 7 supports 12, 12 'are provided on the machine frame, in which pressure pieces 14, 14' are resiliently arranged via springs 13, 13 '. These supports 12, 12 'and the pressure pieces 14, 14' are arranged so that they press on the trunnions 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 machine frame 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 between Application roller 4 and friction roller 5 a rubbing takes place.

Auftragwalze und vorgeschaltete Walze können in einem gemeinsamen Hebel gelagert sein.Applicator roller and upstream roller can be mounted in a common lever.

Claims (2)

1.) Device for preventing stripes on rollers in roller units in the machine frame (7), of a printing press, in which a medium such as ink, damping agent or varnish can be fed via an application roller (4) of the roller unit having an elastic periphery to a plate cylinder (1), wherein the application roller (4) is pressed by means of resilient pressure pieces (14) against a roller (5) upstream of the application roller (4), characterised in that resilient pressure pieces (14') are also arranged on the upstream roller (5), wherein the spring forces for all pressure pieces (14, 14') are so dimensioned and directed that even during the shock on the application roller (4) as a result of passage of the plate cylinder print start, the bearing play in the bearing bores (8, 9) in the machine frame (7) for the application roller bearing journal (11) is displaced to the side remote from the upstream roller (5) and for the bearing journal (10) in the upstream roller (5) to the side remote from the application roller (4), and that all pressure pieces (14, 14') are supported via springs (13, 13') on bearers (12, 12'), wherein the bearers (12, 12') are fixed on the press frame (7).
2.) Device according to Claim 1 characterised in that application roller (4) and upstream roller (5) are mounted in a common lever arm.
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 EP0090179A1 (en) 1983-10-05
EP0090179B1 true 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610466A1 (en) * 1996-03-16 1997-09-25 Roland Man Druckmasch Storage for a roller in a printing press
WO2003103967A1 (en) 2002-06-11 2003-12-18 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

Families Citing this family (5)

* 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
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
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

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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
DE1069157B (en) * 1959-11-19 Roland Offsetmascbinenfabrik Faber &. Schleicher Aktiengesellschaft, Offenbach/M Form roller bearings for printing machines
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
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
FR1502646A (en) * 1966-03-31 1967-11-24 Gillette France Play compensating bearing
DE1611302C3 (en) * 1968-01-27 1975-09-25 Koenig & Bauer Ag, 8700 Wuerzburg Device for turning the offset cylinder on and off
FR2230502B1 (en) * 1973-05-21 1978-12-01 Ibm
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
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610466A1 (en) * 1996-03-16 1997-09-25 Roland Man Druckmasch Storage for a roller in a printing press
DE19610466C2 (en) * 1996-03-16 2000-12-28 Roland Man Druckmasch Storage for a roller in a printing press
WO2003103967A1 (en) 2002-06-11 2003-12-18 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

Also Published As

Publication number Publication date
DE3364596D1 (en) 1986-08-28
ATE20855T1 (en) 1986-08-15
JPS5981173A (en) 1984-05-10
JPH0218986B2 (en) 1990-04-27
US4495863A (en) 1985-01-29
DE3211154A1 (en) 1983-10-06
EP0090179A1 (en) 1983-10-05

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