EP0813961B1 - Offset printing device for rotary press - Google Patents

Offset printing device for rotary press Download PDF

Info

Publication number
EP0813961B1
EP0813961B1 EP97106619A EP97106619A EP0813961B1 EP 0813961 B1 EP0813961 B1 EP 0813961B1 EP 97106619 A EP97106619 A EP 97106619A EP 97106619 A EP97106619 A EP 97106619A EP 0813961 B1 EP0813961 B1 EP 0813961B1
Authority
EP
European Patent Office
Prior art keywords
inking
plate cylinder
rollers
peripheral speed
offset printing
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
EP97106619A
Other languages
German (de)
French (fr)
Other versions
EP0813961A1 (en
Inventor
Peter Hummel
Robert Ortner
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 EP0813961A1 publication Critical patent/EP0813961A1/en
Application granted granted Critical
Publication of EP0813961B1 publication Critical patent/EP0813961B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/22—Rollers

Definitions

  • the invention relates to an offset printing device for a Rotary printing machine according to the preamble of claim 1.
  • An offset printing device of this type is known from DE 44 23 286 A1.
  • a The plate cylinder carries one for the dampening agent-free offset printing (Dry flat printing) suitable printing form, which with a corresponding Ink is colored.
  • an additional application roller to the Printing form can be switched on and off.
  • the additional applicator roller is in two operating positions switchable. The applicator roller is on in the first operating position the printing form and with a different peripheral speed The peripheral speed of the plate cylinder can be operated and in the second operating position the application roller is turned off from the printing form, but in the Inking unit integrated.
  • a wet offset printing device is known from DE-AS 18 08 909.
  • To the Removal of contaminants on the printing form is at least one applicator roller of dampening or inking units with different peripheral speeds to the peripheral speed of the plate cylinder by means of a gear train (positively) drivable.
  • This procedure is for a dry offset plate, which has a non-metallic surface coating, unsuitable, because the dry planographic printing plate is opposed to a dampening agent Printing plate for offset printing is less wear resistant.
  • DE-A-2 309 850 is an offset printing machine for one Rotary printing press known, the inking unit on the ink storage side Has ink roller, which with a to the peripheral speed Plate cylinder smaller circumferential speed are positively driven.
  • the invention is intended to avoid torsional vibrations and doubling by due to the special peripheral speeds of the ink storage side Ink friction rollers in the gear train a tension is built up that Avoid backlash, circumferential vibrations and possibly a flank change. Notes on reducing contamination and / or using a dampening agent-free pressure plate are not to be removed.
  • the object of the invention is to develop an offset printing device which the contamination that occurs during offset printing is noticeably reduced.
  • all form-fit ink rollers can be operated in the inking unit with different to the peripheral speed of the plate cylinder Circumferential speed operated, the inking rollers themselves none have positive drive.
  • the positively driven Ink rollers within the inking unit gradually with different ones Circumferential speeds to the plate cylinder circumferential speed driven in rotation.
  • the inking unit a difference in the circumferential speeds of the positive operated ink rollers built up, which, for example, at least one, the inking roller adjacent to the plate cylinder 2% and with one of the plate cylinders most distant, e.g. the ink roller adjacent to the ink lifter in the roller train is 10% of the peripheral speed of the plate cylinder.
  • the positively driven ink rollers rotate with respect to the peripheral speed of the plate cylinder, preferably in total lower peripheral speed. Alternatively, a higher differential speed is also possible permissible for the peripheral speed of the plate cylinder.
  • a rotational slip forms at each roller contact point of the inking unit.
  • the rotation slip is formed in particular on the inking rollers by two contact points, the first to the plate cylinder and the second to the adjacent, form-fittingly operated inking unit roller.
  • the rotational slip forms the Wiping effect "which reduces the contamination (paper dust, slugs, etc.) that occurs in the inking unit. In the process, the contamination in the contact points is destroyed or noticeably reduced, so that there are no negative effects on the print quality.
  • One known from the prior art This eliminates the need for dirt trap rollers.
  • the intervals between the washing cycles for inking unit washing can be increased, which also saves detergent and water.
  • the plastic-coated inking unit rollers, which experience has shown are susceptible to build-up, do not need to be substituted.
  • a printing unit comprises a blanket cylinder 1 and a plate cylinder 2, which is a dry planographic printing plate for the waterless Offset printing.
  • the plate cylinder 2 are four inking rollers 4.1 to 4.4 Assigned on and off assignable.
  • the inking rollers 4.1 to 4.4 are part of it an inking unit 5 formed by a plurality of inking rollers, which the Dry flat printing plate with a suitable for waterless offset printing Ink colors. This is done in a known manner from a paint box a jack roller and a roller train of the inking unit 5 the printing ink on the Transfer the dry flat printing plate.
  • the ink roller 3.4 can with 2% (analog to the ink roller 3.2) be positively driven.
  • the inking rollers 3.1-3.4 have a traversing drive on.
  • the transfer rollers adjacent to the inking rollers 3.1 - 3.4 (without Item number) and the inking rollers 4.1 - 4.4 are changeable.
  • the mode of operation is as follows: In printing operation, the inking rollers 3.1 - 3.4 constantly with a deviating to the peripheral speed of the plate cylinder Peripheral speed driven.
  • the difference in peripheral speeds is in the present example a maximum of 6% and a minimum of 2% to the Circumferential speed of the plate cylinder 2.
  • the circumferential speeds the inking rollers 3.1 - 3.4 are always less than the peripheral speed of the Plate cylinder 2.
  • the rotation and traversing movement of the inking rollers 3.1 - 3.4 is frictionally engaged on the adjacent rollers of the inking unit 5 transfer. In the contact points, in particular between plate cylinder 2 and the inking rollers 4.1 to 4.4. become the impurities (Dirt particles, dust, paper and paint particles) reduced.
  • the printing unit according to the invention comprises a blanket cylinder 1, a plate cylinder 2, which is a printing plate for wet offset printing carries and an inking unit 5.
  • the plate cylinder 2 is still a Dampening unit 6 assigned, which has a dampening roller 7 that can be turned on and off having.
  • the dampening roller 7 is in a known manner with a dampener, which is immersed in a dampening solution tank.
  • the damp doctor is assigned a metering roller.
  • the dampening roller 7 is a bridge roller arranged switchable adjacent to the first inking roller 4.1. If necessary A further rider roller can be assigned to the dampening roller 7.
  • the Inking unit 5 has form-fit drivable inking rollers 3.1 - 3.4, which are next to the rotary drive have a traversing drive.
  • the ink rollers 3.1 - 3.4 neighboring transfer or inking rollers 4.1 - 4.4 are frictional in contact with the inking rollers 3.1 - 3.4.
  • the inking roller 3.3 as from Plate cylinder most distant form-fit drivable roller with the largest Difference in the peripheral speed to the plate cylinder peripheral speed operated.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Testing Of Balance (AREA)

Abstract

The printing device has an inking unit (5) containing inking rolls (3.1-3.4) rotating positively and in contact with transfer rolls and ink applying rolls (4.1-4.4) The inking rolls can be driven at a circumferential speed differing from that of the plate cylinder (2). Those colour rolls (3.3 and 3.1) which are remote from the plate cylinder are driven at a greater difference in circumferential speed from that of the plate cylinder than those (3.2,3.4) which are adjacent to the plate cylinder and in friction contact with the changeable ink applying rolls.

Description

Die Erfindung betrifft eine Offsetdruckvorrichtung für eine Rotationsdruckmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to an offset printing device for a Rotary printing machine according to the preamble of claim 1.

Eine Offsetdruckvorrichtung dieser Art ist aus der DE 44 23 286 A1 bekannt. Ein Plattenzylinder trägt dabei eine für den feuchtmittelfreien Offsetdruck (Trockenflachdruck) geeignete Druckform, welche mit einer entsprechenden Druckfarbe eingefärbt wird. Zur Beseitigung bzw. zum Verhindern von Verunreinigungen, die sich negativ im Druckbild auf den Bedruckstoff widerspiegeln, ist unabhängig von den vorhandenen Farbwalzen eine zusätzliche Auftragwalze an die Druckform an- und abstellbar. Die zusätzliche Auftragwalze ist in zwei Betriebsstellungen schaltbar. Dabei ist in der ersten Betriebsstellung die Auftragwalze an der Druckform angestellt und mit einer differierenden Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders betreibbar und in der zweiten Betriebsstellung ist die Auftragwalze von der Druckform abgestellt, jedoch in das Farbwerk integriert.An offset printing device of this type is known from DE 44 23 286 A1. A The plate cylinder carries one for the dampening agent-free offset printing (Dry flat printing) suitable printing form, which with a corresponding Ink is colored. To remove or prevent contamination, that are negatively reflected in the print image on the substrate is independent from the existing ink rollers an additional application roller to the Printing form can be switched on and off. The additional applicator roller is in two operating positions switchable. The applicator roller is on in the first operating position the printing form and with a different peripheral speed The peripheral speed of the plate cylinder can be operated and in the second operating position the application roller is turned off from the printing form, but in the Inking unit integrated.

Aus der DE-AS 18 08 909 ist eine Naß-Offset-Druckvorrichtung bekannt. Zum Entfernen von Verunreinigungen auf der Druckform ist mindestens eine Auftragwalze von Feucht- oder Farbwerk mit unterschiedlicher Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders mittels einer Zahnradfolge (formschlüssig) antreibbar. Diese Verfahrensweise ist für eine Trocken-Offsetplatte, welche eine nichtmetallische Oberflächenbeschichtung aufweist, ungeeignet, da die Trocken-Flachdruckplatte gegenüber einer feuchtmittelführenden Druckplatte für den Offsetdruck weniger verschleißfest ist. Weiterhin werden die Verunreinigungen in das Farbwerk bzw. Feuchtwerk an eine Walze weiter transportiert, wo die angesammelten Verunreinigungen in bestimmten Abständen z.B. im Farbwerk entfernt werden müssen.A wet offset printing device is known from DE-AS 18 08 909. To the Removal of contaminants on the printing form is at least one applicator roller of dampening or inking units with different peripheral speeds to the peripheral speed of the plate cylinder by means of a gear train (positively) drivable. This procedure is for a dry offset plate, which has a non-metallic surface coating, unsuitable, because the dry planographic printing plate is opposed to a dampening agent Printing plate for offset printing is less wear resistant. Furthermore, the Contaminants transported to a roller in the inking unit or dampening unit, where the accumulated impurities at certain intervals e.g. must be removed in the inking unit.

Gemäß DE-A-2 309 850 ist eine Offsetdruckmaschine für eine Rotationsdruckmaschine bekannt, deren Farbwerk farbspeicherseitig Farbreiberwalzen aufweist, welche mit einer zur Umfangsgeschwindigkeit eines Plattenzylinders kleineren Umfangsgeschwindigkeit formschlüssig antreibbar sind. Die Erfindung soll Drehschwingungen sowie das Doublieren vermeiden, indem durch die speziellen Umfangsgeschwindigkeiten der farbspeicherseitigen Farbreiberwalzen im Getriebezug eine Zugspannung aufgebaut wird, die das Zahnspiel, Umfangsschwingungen sowie ggf. einen Flankenwechsel vermeidet. Hinweise zur Reduzierung von Verschmutzungen und/oder zum Einsatz einer feuchtmittelfreien Druckplatte sind nicht zu entnehmen.According to DE-A-2 309 850 is an offset printing machine for one Rotary printing press known, the inking unit on the ink storage side Has ink roller, which with a to the peripheral speed Plate cylinder smaller circumferential speed are positively driven. The invention is intended to avoid torsional vibrations and doubling by due to the special peripheral speeds of the ink storage side Ink friction rollers in the gear train a tension is built up that Avoid backlash, circumferential vibrations and possibly a flank change. Notes on reducing contamination and / or using a dampening agent-free pressure plate are not to be removed.

Aufgabe der Erfindung ist es, eine Offsetdruckvorrichtung zu entwickeln, welche die beim Offsetdruck auftretenden Verschmutzungen spürbar reduziert.The object of the invention is to develop an offset printing device which the contamination that occurs during offset printing is noticeably reduced.

Erfindungsgemäß werden im Farbwerk alle formschlüssig betreibbaren Farbwalzen mit zur Umfangsgeschwindigkeit des Plattenzylinders unterschiedlicher Umfangsgeschwindigkeit betrieben, wobei die Farbauftragwalzen selbst keinen formschlüssigen Antrieb aufweisen. Dazu werden die formschlüssig angetriebenen Farbwalzen innerhalb des Farbwerkes stufenweise mit zueinander abweichenden Umfangsgeschwindigkeiten zur Plattenzylinderumfangsgeschwindigkeit rotierend angetrieben. Die innerhalb des Farbwerkes dem Plattenzylinder näher angeordneten Farbwalzen werden dabei vorzugsweise mit geringerer, die dem Plattenzylinder weiter entfernt angeordneten Farbwalzen werden dabei vorzugsweise mit größerer Differenz in ihren Umfangsgeschwindigkeiten zur Umfangsgeschwindigkeit des Plattenzylinders betrieben. Dadurch wird innerhalb des Farbwerkes ein Differenzgefälle der Umfangsgeschwindigkeiten der formschlüssig betriebenen Farbwalzen aufgebaut, welches beispielsweise bei wenigstens einer, dem Plattenzylinder benachbarten Farbauftragwalze 2% und bei einer dem Plattenzylinder am weitesten entfernten, z.B. dem Farbheber benachbarten, Farbwalze im Walzenzug 10% zur Umfangsgeschwindigkeit des Plattenzylinders beträgt. Dabei rotieren die formschlüssig angetriebenen Farbwalzen, bezogen auf die Umfangsgeschwindigkeit des Plattenzylinders, vorzugsweise insgesamt mit geringerer Umfangsgeschwindigkeit. Alternativ ist ebenso eine höhere Differenzgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders zulässig.According to the invention, all form-fit ink rollers can be operated in the inking unit with different to the peripheral speed of the plate cylinder Circumferential speed operated, the inking rollers themselves none have positive drive. For this, the positively driven Ink rollers within the inking unit gradually with different ones Circumferential speeds to the plate cylinder circumferential speed driven in rotation. The closer to the plate cylinder within the inking unit arranged ink rollers are preferably with less, the Plate cylinders located further away are preferred with a greater difference in their peripheral speeds from the peripheral speed of the plate cylinder operated. This is within the inking unit a difference in the circumferential speeds of the positive operated ink rollers built up, which, for example, at least one, the inking roller adjacent to the plate cylinder 2% and with one of the plate cylinders most distant, e.g. the ink roller adjacent to the ink lifter in the roller train is 10% of the peripheral speed of the plate cylinder. The positively driven ink rollers rotate with respect to the peripheral speed of the plate cylinder, preferably in total lower peripheral speed. Alternatively, a higher differential speed is also possible permissible for the peripheral speed of the plate cylinder.

Durch die Abstufung der Differenzgeschwindigkeiten der Farbwerkswalzen zur Umfangsgeschwindigkeit des Plattenzylinders bildet sich an jeder Walzenkontaktstelle des Farbwerkes ein Rotationsschlupf aus. Der Rotationsschlupf ist insbesondere an den Farbauftragwalzen durch zwei Kontaktstellen, wobei die erste zum Plattenzylinder und die zweite zur benachbarten, formschlüssig betriebenen Farbwerkswalze besteht, gebildet. Der Rotationsschlupf bildet den

Figure 00030001
Wischeffekt" der im Farbwerk die auftretenden Verschmutzungen (Papierstaub, Butzen etc.) reduziert. Dabei werden die Verunreinigungen in den Kontaktstellen zerstört oder spürbar verkleinert, so daß negative Auswirkungen auf die Druckqualität ausbleiben. Eine aus dem Stand der Technik bekannte Schmutzfängerwalze" ist dadurch hinfällig. Die Abstände der Waschzyklen beim Farbwerkswaschen können dadurch vergrößert werden, was zusätzlich Waschmittel und Wasser spart. Die kunststoffbeschichteten Farbwerkswalzen, welche erfahrungsgemäß anfällig für den Aufbau für Verunreinigungen sind, brauchen nicht substituiert zu werden.Due to the gradation of the differential speeds of the inking unit rollers to the peripheral speed of the plate cylinder, a rotational slip forms at each roller contact point of the inking unit. The rotation slip is formed in particular on the inking rollers by two contact points, the first to the plate cylinder and the second to the adjacent, form-fittingly operated inking unit roller. The rotational slip forms the
Figure 00030001
Wiping effect "which reduces the contamination (paper dust, slugs, etc.) that occurs in the inking unit. In the process, the contamination in the contact points is destroyed or noticeably reduced, so that there are no negative effects on the print quality. One known from the prior art This eliminates the need for dirt trap rollers. The intervals between the washing cycles for inking unit washing can be increased, which also saves detergent and water. The plastic-coated inking unit rollers, which experience has shown are susceptible to build-up, do not need to be substituted.

Um das Auftreten von Verunreinigungen noch stärker zu reduzieren können die formschlüssig rotierenden, mit Differenzgeschwindigkeit zur Plattenzylinderumfangsgeschwindigkeit angetriebenen Farbwalzen zusätzlich noch formschlüssig axial oszillierend (changierend) angetrieben werden. Die Changierbewegung wird reibschlüssig auch auf die nicht angetriebenen Farbwerkswalzen übertragen. Dadurch entsteht neben dem Rotationsschlupf ein Axialschlupf innerhalb jeder Walzenkontaktstelle. Durch diesen zusätzlichen Axialschlupf werden die Verschmutzungen zusätzlich verkleinert und können weiter reduziert werden bzw. wird das Entstehen von Verschmutzungen von Beginn an verhindert. Die Ausbildung der Offsetdruckvorrichtung eignet sich dabei für den wasserlosen Offsetdruck (Trocken-Flachdruck) als auch für den Naß-Offsetdruck unter Verwendung eines Feuchtwerkes.To reduce the occurrence of impurities even more form-fitting rotating, with differential speed to the plate cylinder peripheral speed driven ink rollers also form-fitting are driven axially oscillating (oscillating). The traversing movement is also frictionally transferred to the non-driven inking unit rollers. Thereby In addition to the rotational slip, there is an axial slip within each roller contact point. This additional axial slip removes the dirt additionally reduced and can be further reduced or will Prevents contamination from the start. Training the Offset printing device is suitable for waterless offset printing (Dry flat printing) as well as for wet offset printing using a Dampening system.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail using an exemplary embodiment.

Dabei zeigt:

Fig. 1
eine schematische Darstellung eines Druckwerkes für den wasserlosen Offsetdruck,
Fig. 2
eine schematische Darstellung eines Druckwerkes für den Naß-Offsetdruck.
It shows:
Fig. 1
1 shows a schematic representation of a printing unit for waterless offset printing,
Fig. 2
is a schematic representation of a printing unit for wet offset printing.

Erstes BeispielFirst example

Ein erfindungsgemäßes Druckwerk umfaßt einen Gummituchzylinder 1 sowie einen Plattenzylinder 2, der eine Trockenflachdruckplatte für den wasserlosen Offsetdruck trägt. Dem Plattenzylinder 2 sind vier Farbauftragwalzen 4.1 bis 4.4 an- und abstellbar zugeordnet. Die Farbauftragwalzen 4.1 bis 4.4 sind Bestandteil eines durch eine Mehrzahl von Farbwalzen gebildeten Farbwerkes 5, welches die Trockenflachdruckplatte mit einer für den wasserlosen Offsetdruck geeigneten Druckfarbe einfärbt. Dazu wird in bekannter Weise von einem Farbkasten über eine Heberwalze und einen Walzenzug des Farbwerkes 5 die Druckfarbe auf die Trockenflachdruckplatte übertragen.A printing unit according to the invention comprises a blanket cylinder 1 and a plate cylinder 2, which is a dry planographic printing plate for the waterless Offset printing. The plate cylinder 2 are four inking rollers 4.1 to 4.4 Assigned on and off assignable. The inking rollers 4.1 to 4.4 are part of it an inking unit 5 formed by a plurality of inking rollers, which the Dry flat printing plate with a suitable for waterless offset printing Ink colors. This is done in a known manner from a paint box a jack roller and a roller train of the inking unit 5 the printing ink on the Transfer the dry flat printing plate.

Die Farbauftragwalzen 4.1 bis 4.4 sind changierbar in Kontakt mit antreibbaren Farbwalzen 3.1, 3.4, die im vorliegenden Beispiel zusätzlich als Farbreiberwalzen ausgebildet sind. Die Farbwalzen 3.1 - 3.4 sind formschlüssig mit dem Plattenzylinder 2 getriebetechnisch gekoppelt und erhalten neben dem Rotationsantrieb einen Changierantrieb. Dabei erhalten auch die Farbauftragwalzen 4.1 - 4.4 von den Farbwalzen 3.2, 3.4 reibschlüssig einen changierenden Antrieb. In einer weiteren Ausbildung kann auch jede Farbwalze 3.1 - 3.4 einen Einzelantrieb oder auch einen gemeinsamen, jedoch vom Plattenzylinder 2 entkoppelten, Antrieb aufweisen. Die vom Plattenzylinder 2 am weitesten entfernt angeordnete Farbwalze 3.3 wird dabei mit größerer Differenz der Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders 2 angetrieben als die dem Plattenzylinder 2 näher angeordneten Farbwalzen 3.2 und 3.4. Die im Walzenzug des Farbwerkes 5 etwa mittig angeordnete Farbwalze 3.1 wird mit dazwischenliegender Differenzgeschwindigkeit betrieben. Das Differenzgefälle wird dabei derart gestuft ausgebildet, daß die:

  • Farbwalze 3.2 mit 2%
  • Farbwalze 3.1 mit 4%
  • Farbwalze 3.3 mit 6%
The inking rollers 4.1 to 4.4 are changeable in contact with drivable inking rollers 3.1, 3.4, which in the present example are additionally designed as inking rollers. The inking rollers 3.1 - 3.4 are positively coupled to the plate cylinder 2 in terms of gear technology and, in addition to the rotary drive, are provided with a traversing drive. The inking rollers 4.1-4.4 also receive an oscillating drive from the inking rollers 3.2, 3.4 by friction. In a further embodiment, each inking roller 3.1-3.4 can also have an individual drive or also a common drive, but decoupled from the plate cylinder 2. The inking roller 3.3 which is furthest away from the plate cylinder 2 is driven with a greater difference in the peripheral speed from the peripheral speed of the plate cylinder 2 than the inking rollers 3.2 and 3.4 arranged closer to the plate cylinder 2. The inking roller 3.1, which is arranged approximately centrally in the roller train of the inking unit 5, is operated with an intermediate differential speed. The differential gradient is designed so that the:
  • Ink roller 3.2 with 2%
  • Ink roller 3.1 with 4%
  • Ink roller 3.3 with 6%

Differenzgeschwindigkeit zur Umfangsgeschwindigkeit formschlüssig angetrieben wird. Die Farbwalze 3.4 kann dabei mit 2 % (analog zur Farbwalze 3.2) formschlüssig angetrieben werden.Differential speed to the peripheral speed driven positively becomes. The ink roller 3.4 can with 2% (analog to the ink roller 3.2) be positively driven.

Zusätzlich zum Rotationsantrieb weisen die Farbwalzen 3.1 - 3.4 einen Changierantrieb auf. Die den Farbwalzen 3.1 - 3.4 benachbarten Übertragwalzen (ohne Positionsnummer) sowie die Farbauftragwalzen 4.1 - 4.4 sind changierbar gelagert.In addition to the rotary drive, the inking rollers 3.1-3.4 have a traversing drive on. The transfer rollers adjacent to the inking rollers 3.1 - 3.4 (without Item number) and the inking rollers 4.1 - 4.4 are changeable.

Die Wirkungsweise ist wie folgt: Im Druckbetrieb werden die Farbwalzen 3.1 - 3.4 ständig mit einer zur Umfangsgeschwindigkeit des Plattenzylinders abweichenden Umfangsgeschwindigkeit angetrieben. Dabei beträgt die Differenz der Umfangsgeschwindigkeiten im vorliegenden Beispiel maximal 6% und minimal 2% zu der Umfangsgeschwindigkeit des Plattenzylinders 2. Die Umfangsgeschwindigkeiten der Farbwalzen 3.1 - 3.4 sind stets geringer als die Umfangsgeschwindigkeit des Plattenzylinders 2. Die Rotations- und Changierbewegung der Farbwalzen 3.1 - 3.4 wird reibschlüssig auf die benachbarten Walzen des Farbwerkes 5 übertragen. In den Kontaktstellen, insbesondere zwischen Plattenzylinder 2 und den Farbauftragwalzen 4.1 bis 4.4. werden die Verunreinigungen (Schmutzpartikel, Staub, Papier und Farbpartikel) reduziert. Durch die höheren Differenzgeschwindigkeiten bei den vom Plattenzylinder 2 entfernter angeordneten Farbwalzen 3.3 sowie 3.1 wird das Vordringen von kleineren Verunreinigungen innerhalb des Walzenzuges verhindert. Bei größeren Verunreinigungen werden die bereits in den Kontaktstellen der Farbwalzen 3.2 und 3.4 verkleinerten Verunreinigungen in den weiter entfernten Kontaktstellen zusätzlich verkleinert.The mode of operation is as follows: In printing operation, the inking rollers 3.1 - 3.4 constantly with a deviating to the peripheral speed of the plate cylinder Peripheral speed driven. The difference in peripheral speeds is in the present example a maximum of 6% and a minimum of 2% to the Circumferential speed of the plate cylinder 2. The circumferential speeds the inking rollers 3.1 - 3.4 are always less than the peripheral speed of the Plate cylinder 2. The rotation and traversing movement of the inking rollers 3.1 - 3.4 is frictionally engaged on the adjacent rollers of the inking unit 5 transfer. In the contact points, in particular between plate cylinder 2 and the inking rollers 4.1 to 4.4. become the impurities (Dirt particles, dust, paper and paint particles) reduced. By the higher Differential velocities at those located further away from the plate cylinder 2 Inking rollers 3.3 and 3.1 will penetrate smaller contaminants prevented within the single drum. With larger impurities those already reduced in the contact points of the ink rollers 3.2 and 3.4 Impurities in the more distant contact points are also reduced.

Zweites BeispielSecond example

Das erfindungsgemäße Druckwerk umfaßt wie im ersten Beispiel einen Gummituchzylinder 1, einen Plattenzylinder 2, der eine Druckplatte für den Naß-Offsetdruck trägt und ein Farbwerk 5. Dem Plattenzylinder 2 ist weiterhin ein Feuchtwerk 6 zugeordnet, welches eine an- und abstellbare Feuchtauftragwalze 7 aufweist. Die Feuchtauftragwalze 7 ist in bekannter Weise mit einem Feuchtduktor, der in einem Feuchtmittelbehälter eintaucht, gekoppelt. Dem Feuchtduktor ist eine Dosierwalze zugeordnet. Der Feuchtauftragwalze 7 ist eine Brückenwalze zur ersten Farbauftragwalze 4.1 zuschaltbar benachbart angeordnet. Bei Bedarf kann eine weitere Reiterwalze der Feuchtauftragwalze 7 zugeordnet sein. Das Farbwerk 5 weist formschlüssig antreibbare Farbwalzen 3.1 - 3.4 auf, die neben dem Rotationsantrieb einen Changierantrieb aufweisen. Die den Farbwalzen 3.1 - 3.4 benachbarten Übertrag- bzw. Farbauftragwalzen 4.1 - 4.4 sind reibschlüssig mit den Farbwalzen 3.1 - 3.4 in Kontakt. Dabei wird die Farbwalze 3.3 als vom Plattenzylinder entfernteste formschlüssig antreibbare Walze mit der größten Differenz in der Umfangsgschwindigkeit zur Plattenzylinderumfangsgeschwindigkeit betrieben.As in the first example, the printing unit according to the invention comprises a blanket cylinder 1, a plate cylinder 2, which is a printing plate for wet offset printing carries and an inking unit 5. The plate cylinder 2 is still a Dampening unit 6 assigned, which has a dampening roller 7 that can be turned on and off having. The dampening roller 7 is in a known manner with a dampener, which is immersed in a dampening solution tank. The damp doctor is assigned a metering roller. The dampening roller 7 is a bridge roller arranged switchable adjacent to the first inking roller 4.1. If necessary A further rider roller can be assigned to the dampening roller 7. The Inking unit 5 has form-fit drivable inking rollers 3.1 - 3.4, which are next to the rotary drive have a traversing drive. The ink rollers 3.1 - 3.4 neighboring transfer or inking rollers 4.1 - 4.4 are frictional in contact with the inking rollers 3.1 - 3.4. The inking roller 3.3 as from Plate cylinder most distant form-fit drivable roller with the largest Difference in the peripheral speed to the plate cylinder peripheral speed operated.

Analog zum ersten Beispiel beträgt hier das Differenzgefälle der Umfangsgeschwindigkeiten für die:

  • Farbwalze 3.3 = 10%
  • Farbwalze 3.1 = 8%
  • Farbwalze 3.2 = 4%
  • Farbwalze 3.4 = 2%
zur Umfangsgeschwindigkeit des Plattenzylinders 2. Zusätzlich zum Rotationsantrieb weisen die Farbwalzen 3.1 - 3.4 wiederum einen Changierantrieb auf. Die den Farbwalzen 3.1 - 3.4 benachbarten Übertragwalzen sowie die in Kontakt stehenden Farbauftragwalzen 4.1 - 4.4 sind changierbar gelagert. Analogous to the first example, the difference in circumferential speeds for:
  • Ink roller 3.3 = 10%
  • Ink roller 3.1 = 8%
  • Ink roller 3.2 = 4%
  • Ink roller 3.4 = 2%
to the peripheral speed of the plate cylinder 2. In addition to the rotary drive, the inking rollers 3.1 - 3.4 in turn have a traversing drive. The transfer rollers adjacent to the inking rollers 3.1-3.4 and the inking rollers 4.1-4.4 in contact are mounted so that they can be changed.

BezugszeichenlisteReference list

11
GummituchzylinderBlanket cylinder
22nd
PlattenzylinderPlate cylinder
3.1 - 3.43.1 - 3.4
FarbwalzeInk roller
4.1 - 4.44.1 - 4.4
FarbauftragwalzeInking roller
55
FarbwerkInking unit
66
FeuchtwerkDampening system
77
FeuchtauftragwalzeDampening roller

Claims (5)

  1. Offset printing device for a rotary printing press with a plate cylinder (2) carrying a printing plate and an inking unit (5) with ink applicator rollers (4.1 - 4.4) as well as inking rollers (3.1 - 3.4) rotating in positively interlocked fashion and axially oscillating, wherein the inking rollers (3.1, 3.3) on the ink store side can be driven with a peripheral speed differing relative to the plate cylinder (2), characterised in that the ink applicator rollers are constructed oscillatingly and that the inking rollers (3.2, 3.4) axially oscillating and rotating in positively driven fashion and which stand in contact with the oscillating ink applicator rollers (4.1 - 4.4) can be driven with a peripheral speed differing from the peripheral speed of the plate cylinder (2), wherein the inking rollers (3.1, 3.3) towards the ink store can be driven with a greater difference relative to the inking rollers (3.2, 3.4) neighbouring the ink applicator rollers (4.1 - 4.4).
  2. Offset printing device according to Claim 1,
    characterised in that the maximum difference of the peripheral speed of the inking roller (3.3) on the ink store side arranged most remote from the plate cylinder (2) relative to the peripheral speed of the plate cylinder (2) amounts to 10%.
  3. Offset printing device according to Claim 1,
    characterised in that the inking rollers (3.1 - 3.4) can be driven with respect to the peripheral speed with a stepped difference profile of at least 2% from one another wherein the inking rollers (3.2, 3.4) neighbouring the ink applicator rollers (4.1 - 4.4) can be driven with the same peripheral speed or not the same peripheral speed.
  4. Offset printing device according to Claim 1,
    characterised in that the plate cylinder (2) carries a dry planographic printing plate for waterless offset printing.
  5. Offset printing device according to Claim 1,
    characterised in that arranged relative to the inking unit (5) upstream in the rotational direction of the plate cylinder (2) is a damping unit (6) and the plate cylinder (2) carries a printing plate suited for wet offset printing.
EP97106619A 1996-06-22 1997-04-22 Offset printing device for rotary press Expired - Lifetime EP0813961B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19625029 1996-06-22
DE19625029A DE19625029A1 (en) 1996-06-22 1996-06-22 Offset printing device for rotary printing machines

Publications (2)

Publication Number Publication Date
EP0813961A1 EP0813961A1 (en) 1997-12-29
EP0813961B1 true EP0813961B1 (en) 1999-06-30

Family

ID=7797722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97106619A Expired - Lifetime EP0813961B1 (en) 1996-06-22 1997-04-22 Offset printing device for rotary press

Country Status (5)

Country Link
US (1) US5823109A (en)
EP (1) EP0813961B1 (en)
JP (1) JPH1067096A (en)
AT (1) ATE181701T1 (en)
DE (2) DE19625029A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10000903A1 (en) 1999-02-05 2000-08-10 Heidelberger Druckmasch Ag Operating printing machine involves driving inking mechanism roller at difference speed and different relative speed wrt. form cylinder speed depending on ink mechanism operating states
DE10008488A1 (en) * 1999-03-17 2000-09-21 Heidelberger Druckmasch Ag Damping unit of three rollers has pivot axle, gaps between, spring, support, swivel bearing and frame
EP1147889A3 (en) * 2000-04-14 2006-01-18 Komori Corporation Roller structure in printing press
US6539859B2 (en) 2000-10-17 2003-04-01 Presstek, Inc. Multicolor printing press
JP4199458B2 (en) * 2001-01-19 2008-12-17 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト Ink machine
JP4276010B2 (en) * 2003-07-24 2009-06-10 株式会社小森コーポレーション Driving device in printing press
US7380498B2 (en) * 2006-08-30 2008-06-03 Julius Domotor Offset lithography system
ES2415804T3 (en) * 2010-03-23 2013-07-29 Cognis Ip Management Gmbh Composition to wash dishes manually, smooth with the skin
US8850976B2 (en) * 2012-01-11 2014-10-07 James M. Jeter Inker assembly for cylindrical can decorators
DE102014222388A1 (en) 2013-11-04 2015-05-07 Koenig & Bauer Aktiengesellschaft Method and device for coloring a printing plate arranged on a plate cylinder of a printing press

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467008A (en) * 1967-01-31 1969-09-16 Julius A Domotor Means and method for removing foreign particles from lithographic press
DE1808909C3 (en) * 1968-11-14 1978-03-02 Julius A. San Francisco Calif. Domotor (V.St.A.) Method for cleaning the plate cylinder of a rotary offset printing press and the related device
DE2309850C3 (en) * 1973-02-28 1978-06-22 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Rotary printing machine with several printing units arranged in series with braking device
DE2658362C3 (en) * 1976-12-23 1984-08-09 Hinterkopf, Kurt G., Dipl.-Ing. (FH), 7332 Eislingen Inking unit for a printing machine, especially for printing tubes, sleeves and the like.
DE2659557A1 (en) * 1976-12-30 1978-07-06 Maschf Augsburg Nuernberg Ag ROTARY OFFSET PRINTER
DE3034644C2 (en) * 1980-09-13 1982-10-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Inking unit with changing inking rollers
JPS58131065A (en) * 1981-10-22 1983-08-04 ダ−ルグレン・マニユフアクチユアリング・コムパニ− Inking roller driving device
US5265527A (en) * 1991-06-14 1993-11-30 Harris Graphics Corporation Offset printing press with emulsification control
US5345865A (en) * 1993-04-07 1994-09-13 Dahlgren Usa, Inc. Hickey removal system
DE4423286C2 (en) * 1994-07-02 1998-06-04 Heidelberger Druckmasch Ag Printing unit for a rotary offset printing machine

Also Published As

Publication number Publication date
US5823109A (en) 1998-10-20
ATE181701T1 (en) 1999-07-15
DE59700237D1 (en) 1999-08-05
DE19625029A1 (en) 1998-01-08
EP0813961A1 (en) 1997-12-29
JPH1067096A (en) 1998-03-10

Similar Documents

Publication Publication Date Title
EP1778488B1 (en) Method and device for controlling a converting machine for sheet material
EP0813961B1 (en) Offset printing device for rotary press
DE19501243C2 (en) Bearings for a cylinder of a rotary printing press
EP1338418B1 (en) Printing press with device for cleaning the printing form
DE10023935B4 (en) Short inking unit of a rotary printing press
EP0668159B1 (en) Offset printing device
DE19625030A1 (en) Offset printing device for rotary printing machines
EP0764524A2 (en) Short-inking device
DE19732059C2 (en) Inking unit for a rotary printing press
EP0267504A2 (en) Bearing for reciprocating applicator rollers in printing machines
DE3644982C2 (en)
DE102004042265B4 (en) Method for moistening a printing form for offset printing
EP0839652B1 (en) Method for cleaning cylinders and rollers in a printing machine
EP0951995B1 (en) Inking unit for an offset printing machine for sheets
DE102008001860A1 (en) Printing machine i.e. sheet-fed printing press, operating method, involves adjusting delta value and/or difference value between speeds of form cylinder and damp applicator roller so that maximum allowable torque at roller is decreased
EP1037746B1 (en) Web guiding roller
DD274003A1 (en) RAKE DEVICE FOR OFFSET PRINTING MACHINES
EP0999046B1 (en) Vibrator-type inking system for a printing machine
DE2259721C3 (en) Inking unit for a web-fed rotary printing press that can be converted from letterpress to offset printing
DE19715614B4 (en) Inking unit for a rotary printing machine
EP1627737A1 (en) Printing unit as well as damping unit
DD275212A1 (en) COLOR WORK FOR PRINTING MACHINES
EP0770483A2 (en) Cleaning device for cleaning cylinders of an offset printing apparatus
DE102004042262B4 (en) Rotary press
DE9422225U1 (en) Dampening unit for a printing press

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970507

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19980327

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 181701

Country of ref document: AT

Date of ref document: 19990715

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990630

REF Corresponds to:

Ref document number: 59700237

Country of ref document: DE

Date of ref document: 19990805

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000430

26N No opposition filed
BERE Be: lapsed

Owner name: MAN ROLAND DRUCKMASCHINEN A.G.

Effective date: 20000430

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20030318

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030325

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030326

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030402

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030403

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030408

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040422

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040423

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041101

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040422

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041231

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20041101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050422

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100423

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59700237

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59700237

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111031