EP0280957B1 - Inking unit for a rotary offset printing machine - Google Patents

Inking unit for a rotary offset printing machine Download PDF

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Publication number
EP0280957B1
EP0280957B1 EP88102256A EP88102256A EP0280957B1 EP 0280957 B1 EP0280957 B1 EP 0280957B1 EP 88102256 A EP88102256 A EP 88102256A EP 88102256 A EP88102256 A EP 88102256A EP 0280957 B1 EP0280957 B1 EP 0280957B1
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EP
European Patent Office
Prior art keywords
ink
roll
roller
rolls
inking
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
EP88102256A
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German (de)
French (fr)
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EP0280957A2 (en
EP0280957A3 (en
Inventor
Karl-Heinz Franz
Kurt Difflipp
Heinrich Ochs
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
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Priority to AT88102256T priority Critical patent/ATE76812T1/en
Publication of EP0280957A2 publication Critical patent/EP0280957A2/en
Publication of EP0280957A3 publication Critical patent/EP0280957A3/en
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Publication of EP0280957B1 publication Critical patent/EP0280957B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/10—Applications of feed or duct rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers
    • 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
    • B41F31/32—Lifting or adjusting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/36—Inking-rollers serving also to apply ink repellants

Definitions

  • the invention relates to an inking unit for a rotary offset printing machine according to the preamble of the second claim.
  • DE-PS 3 334 470 shows a single-strand inking unit for a rotary offset printing press with several ink transport and ink application rollers.
  • the dampening solution is fed to the first inking roller or the last inking roller or both.
  • the ink is fed to a first and second inking roller assigned to the friction roller, five inking rollers each being connected in series on the plate cylinder, between each of which a rider roller is arranged.
  • the first rider roller and the third rider roller are designed as distribution rollers.
  • the ink splitting conditions are changed. If the amount of dampening solution changes in the gap points of the ink flow due to a change in the dampening solution supply by a dampening system, especially when dampening directly into the inking unit, the ink supply (ink supply) must be readjusted in order to obtain the same ink application on the printing plate.
  • Inking units are generally known which share the ink flow in such a way that an ink flow component is fed to the first inking roller (s) and a second ink stream component is fed to the last inking rollers (see, for example, DE-PS 2 302 261, DE-PS 3 434 647, DE-PS 3 143 909).
  • These inking units have a larger number of inking rollers in connection with a distributor roller, from which the two ink streams are transferred to three or more inking rollers connected in series on the plate cylinder.
  • the distributor roller is coupled to the ink supply and, on the other hand, to branch rollers which guide the partial ink strands onto the ink application rollers.
  • the object of the invention is to create an inking unit which, with a low tendency to stenciling, is also insensitive in the ink flow when the dampening solution is changed.
  • the advantages that can be achieved with the invention are in particular in that the inking rollers transfer graded ink transfer components, decreasing from the first inking roller 3 seen in the direction of rotation of the plate cylinder 1 of the two front inking rollers 3, 4 to the last inking roller 6 on the printing plate.
  • the ink flow and thus the ink gradient in the inking unit remain almost constant if, due to changes in the dampening solution supply due to changes in the settings of the dampening unit or due to different amounts of dampening solution on the printing plate, the ink splitting conditions, in particular in the nips between the front distribution roller and the adjacent inking rollers as well as those in this ink ribbon Change branch roller.
  • a driven ink fountain roller 17 dips into the printing ink 19 of an ink fountain 18 of a rotary offset printing machine. From the ink fountain roller 17, a pendulum-like reciprocating lifting roller 16 takes fresh printing ink 19 and transfers it to a plastic-coated ink fountain pen 15. The parts 15 to 18 form the ink supply.
  • the ink flow leads via a rubber-coated ink feed roller 14 to a plastic-coated distributor roller 12. This divides the ink flow into two ink streams, one of which is guided onto a rubber-coated branch roller 11 and the other onto a rubber-coated branch roller 13.
  • the first partial ink flow is passed via the branch roller 13 and an ink transport roller 8, which can optionally be designed as a friction roller, to two front inking rollers 3, 4.
  • the second ink flow is conducted via the branch roller 11 and a rubbing roller 7 onto the first application roller 3 of the two front ink application rollers 3, 4 (see FIG. 4) or additionally onto a further ink application roller 2 which, seen in the direction of rotation of the plate cylinder 1, of the first ink application roller 3 the two front inking rollers 3, 4 is connected upstream (see FIGS. 1 to 3).
  • the second applicator roller 4 of the two front applicator rollers 3, 4 is followed by a rear inking roller 5 and, optionally, another inking roller 6, seen in the direction of rotation of the plate cylinder 1.
  • the inking rollers 5, 6 also have rolling contact with the printing plate and, like the front inking rollers 2 to 4 rubber coated.
  • a plastic-coated friction roller 9 rolls on the inking rollers 4 and 5, and there is one on the inking rollers 5 and 6 plastic-coated inking roller 10 placed as a rider roller.
  • the proportion of ink quantity in the first partial color stream is automatically increased by this amount.
  • the ink transfer proportion of the inking roller 2 (according to FIGS. 1 to 3) or onto the inking roller 3 (according to FIG. 4) is reduced.
  • the ink transfer components of the ink application rollers 3 to 6 increase at the same time by this ink component, the gradation of the ink transfer components of the ink application rollers 3 to 6 being retained in the direction of rotation of the plate cylinder 1.
  • the overall color gradient in the inking unit remains constant and thus also the setting of the ink supply to the inking unit, the color scheme.
  • the effect according to the invention can be improved in a manner not shown in the drawing, in that the first branch roller 13 is designed as an oscillating rubbing roller and / or the first branch roller 13 can be switched on and off or controlled in a clocked manner by the adjacent rollers 8, 12 is stored parkable.
  • the inking rollers 2 to 5 are seen in the direction of rotation of the plate cylinder 1, and are designed to transfer the following maximum ink components: 2 1.Inking roller 2 32% 2.Inking roller 3 38% 3.Inking roller 4 26% 4.Inking roller 5 4% 3 1.Inking roller 2 9% 2.Inking roller 3 49% 3.Inking roller 4 35% 4.Inking roller 5 7% 4 1.Inking roller 3 62% 2.Inking roller 4 32% 3. Ink application roller 5 6%
  • Fig. 5 each show an ink flow to the plate cylinder 1 on the left in the event that the ink transfer takes place undisturbed and on the right in the case that dampening solution supplied hinders the flow in one partial flow, which means a shift in the flow rate to the other partial flow causes.
  • FIG. 6 shows a further embodiment of the invention, in which a parallel ink flow is connected upstream of the front inking roller.
  • the distributor roller 12 and the front inking roller 3 stand by the branch roller provided in the first roller train 13 or by means of the branch roller 11 provided in the second roller train, without further ink transport rollers being interposed, in direct connection with one another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Labeling Devices (AREA)
  • Printing Methods (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

The offset inking unit features a distribution roller (12), which, via a first branching roller (13) in a first roller train, is in contact with an ink transport roller (8), against which lie two leading inking rollers (3, 4) and which is in contact via a second branching roller (11) with a friction roller (7) in a second roller train connected in parallel to the first roller train, such that, seen in the direction of rotation of the plate cylinder, at least the first inking roller (3) of the two leading inking rollers (3, 4) lies against the distribution roller (7). Seen in the direction of rotation of the plate cylinder (1), the second inking roller (4) of the two leading inking rollers (3, 4) is connected at least to one further inking roller (5) positioned later in the train by means of an additional ink transport roller (9). Damping is carried out either directly onto the printing plate or onto a leading inking roller. <IMAGE>

Description

Die Erfindung betrifft ein Farbwerk für eine Rotations-Offsetdruckmaschine gemäß dem Oberbegriff des zweiten Patentanspruches.The invention relates to an inking unit for a rotary offset printing machine according to the preamble of the second claim.

Die DE-PS 3 334 470 zeigt ein einsträngiges Farbwerk für eine Rotations-Offsetdruckmaschine mit mehreren Farbtransport- und Farbauftragwalzen. Das Feuchtmittel wird der ersten Farbauftragwalze oder der letzten Farbauftragwalze oder beiden zugeführt. Die Farbe wird einer ersten und zweiten Farbauftragwalze zugeordneten Reibwalze zugeführt, wobei jeweils fünf Farbauftragwalzen am Plattenzylinder hintereinander geschaltet sind, zwischen denen jeweils eine Reiterwalze angeordnet ist. Die erste Reiterwalze und die dritte Reiterwalze sind als Verreibwalzen ausgeführt. Mit der beschriebenen Anordnung der Fünf-Farb-Auftragwalzen und Reiterwalzen wird erreicht, daß die Zügigkeit der Offsetdruckfarbe auf den Farbauftragwalzen in Drehrichtung des Plattenzylinders gesehen von Farbauftragwalze zu Farbauftragwalze abnimmt bzw. mindestens gleich bleibt. Dadurch wird das Spaltungsverhalten im Farbwerk dahingehend optimiert, daß ein Schablonieren weitestgehend vermieden werden kann.DE-PS 3 334 470 shows a single-strand inking unit for a rotary offset printing press with several ink transport and ink application rollers. The dampening solution is fed to the first inking roller or the last inking roller or both. The ink is fed to a first and second inking roller assigned to the friction roller, five inking rollers each being connected in series on the plate cylinder, between each of which a rider roller is arranged. The first rider roller and the third rider roller are designed as distribution rollers. With the arrangement of the five-color application rollers and rider rollers described, it is achieved that the smoothness of the offset printing ink on the ink application rollers in the direction of rotation of the plate cylinder decreases from ink application roller to ink application roller or remains at least the same. This optimizes the splitting behavior in the inking unit so that stenciling can be largely avoided.

Bei einer Farbzufuhr durch nur einen Farbstrom auf die Farbauftragwalzen werden bei Veränderungen des Feuchtmittelanteils in den Spaltstellen, die im Farbstrom liegen, Farbspaltungsverhältnisse verändert. Verändert sich der Feuchtmittelanteil in den Spaltstellen des Farbstromes infolge veränderter Feuchtmittelzufuhr durch ein Feuchtwerk, insbesondere bei Feuchtung direkt ins Farbwerk, so muß, um einen gleichen Farbauftrag auf die Druckplatte zu erhalten, die Farbzufuhr (Farbführung) nachgeregelt werden. Verändert sich der Feuchtmittelanteil in den Spaltstellen des Farbstromes infolge unterschiedlicher Feuchtmittelmenge auf der Druckplatte, bedingt durch die Verteilung von druckenden und nichtdruckenden Flächenanteilen, entstehen Pulsationen im Farbstrom, durch die Schablonieren hervorgerufen wird.When ink is supplied to the inking rollers by only one ink stream, when there is a change in the dampening solution content in the gap points which are in the ink stream, the ink splitting conditions are changed. If the amount of dampening solution changes in the gap points of the ink flow due to a change in the dampening solution supply by a dampening system, especially when dampening directly into the inking unit, the ink supply (ink supply) must be readjusted in order to obtain the same ink application on the printing plate. The amount of dampening solution changes in the gaps in the ink flow due to the different amount of dampening solution on the printing plate, due to the distribution of printing and non-printing areas, pulsations occur in the ink flow, which causes stenciling.

Allgemein sind Farbwerke bekannt, welche den Farbstrom in der Art teilen, daß eine Farbstromanteil der/den ersten Farbauftragwalze(n) und ein zweiter Farbstromanteil den letzten Farbauftragwalzen zugeführt wird (siehe z.B. DE-PS 2 302 261, DE-PS 3 434 647, DE-PS 3 143 909). Diese Farbwerke weisen eine größere Anzahl Farbtransportwalzen in Verbindung mit einer Verteilerwalze auf, von der aus die zwei Farbströme auf drei oder mehr am Plattenzylinder hintereinandergeschaltete Farbauftragwalzen übertragen werden. Einerseits wird die Verteilerwalze mit der Farbzuführung und andererseits mit Abzweigwalzen gekoppelt, die die Farbteilstränge auf die Farbauftragwalzen leiten. Bei diesen Farbwerken ist das Nachregeln der Farbführung bei Veränderung der Farbspaltungsverhältnisse in einem Farbstromanteil zwar nicht erforderlich, aber die Abstufung der Farbübertragungsanteile der einzelnen Auftragwalzen ist nicht gewährleistet. Im Extremfall werden die Farbübertragungsanteile der letzten Farbauftragwalzen größer als die der ersten Farbauftragwalze(n), was zu den bekannten Erscheinungen des Schablonierens führt.Inking units are generally known which share the ink flow in such a way that an ink flow component is fed to the first inking roller (s) and a second ink stream component is fed to the last inking rollers (see, for example, DE-PS 2 302 261, DE-PS 3 434 647, DE-PS 3 143 909). These inking units have a larger number of inking rollers in connection with a distributor roller, from which the two ink streams are transferred to three or more inking rollers connected in series on the plate cylinder. On the one hand, the distributor roller is coupled to the ink supply and, on the other hand, to branch rollers which guide the partial ink strands onto the ink application rollers. With these inking units, it is not necessary to readjust the ink flow when changing the ink splitting ratios in an ink flow component, but the gradation of the ink transfer components of the individual application rollers is not guaranteed. In extreme cases, the ink transfer proportions of the last inking rollers become larger than that of the first inking roller (s), which leads to the known phenomena of stenciling.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Farbwerk zu schaffen, welches bei geringer Neigung zum Schablonieren zugleich unempfindlich in der Farbführung bei Veränderung der Feuchtmittelführung ist.On the basis of this prior art, the object of the invention is to create an inking unit which, with a low tendency to stenciling, is also insensitive in the ink flow when the dampening solution is changed.

Gelöst wird die Aufgabe durch den Gegenstand der kennzeichnenden Teile des zweiten Patentanspruches. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen in Verbindung mit der Beschreibung und der Zeichnung.The object is achieved by the subject matter of the characterizing parts of the second claim. Further developments of the invention result from the subclaims in connection with the description and the drawing.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die Farbauftragwalzen abgestufte Farbübertragungsanteile, abnehmend von der in Drehrichtung des Plattenzylinders 1 gesehenen ersten Farbauftragwalze 3 der zwei vorderen Farbauftragwalzen 3, 4 bis zur letzten Farbauftragwalze 6 auf die Druckplatte übertragen. Außerdem bleiben die Farbführung und damit das Farbgefälle im Farbwerk annähernd konstant, wenn sich infolge Veränderung der Feuchtmittelzufuhr durch Einstellungsänderungen am Feuchtwerk oder durch unterschiedliche Feuchtmittelmengen auf der Druckplatte die Farbspaltungsverhältnisse insbesondere in den Spaltstellen zwischen der vorderen Reibwalze und den anliegenden Farbauftragwalzen sowie der in diesem Farbstrang liegenden Abzweigwalze verändern.The advantages that can be achieved with the invention are in particular in that the inking rollers transfer graded ink transfer components, decreasing from the first inking roller 3 seen in the direction of rotation of the plate cylinder 1 of the two front inking rollers 3, 4 to the last inking roller 6 on the printing plate. In addition, the ink flow and thus the ink gradient in the inking unit remain almost constant if, due to changes in the dampening solution supply due to changes in the settings of the dampening unit or due to different amounts of dampening solution on the printing plate, the ink splitting conditions, in particular in the nips between the front distribution roller and the adjacent inking rollers as well as those in this ink ribbon Change branch roller.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend näher beschrieben.
Es zeigt:

Fig. 1
eine schematische Seitenansicht des erfindungsgemäßen Farbwerkes,
Fig. 2
das Farbwerk gemäß Fig. 1, mit Einfeuchtung der Druckplatte direkt über eine Feuchtauftragwalze,
Fig. 3
das Farbwerk gemäß Fig. 1, mit Einfeuchtung der Druckplatte direkt über die erste Farbauftragwalze,
Fig. 4
eine weitere Ausführungsform der Erfindung mit Einfeuchtung der Druckplatte direkt über eine Feuchtauftragwalze,
Fig. 5
eine schematische Darstellung des Farbflusses zur Druckplatte,
Fig. 6
eine weitere Auführungsform der Erfindung.
Embodiments of the invention are shown in the drawing and are described in more detail below.
It shows:
Fig. 1
a schematic side view of the inking unit according to the invention,
Fig. 2
1, with dampening of the printing plate directly via a dampening roller,
Fig. 3
1, with dampening of the printing plate directly over the first inking roller,
Fig. 4
another embodiment of the invention with dampening of the printing plate directly via a dampening roller,
Fig. 5
a schematic representation of the ink flow to the printing plate,
Fig. 6
another embodiment of the invention.

In die Druckfarbe 19 eines Farbkastens 18 einer Rotations-Offsetdruckmaschine taucht in bekannter Weise eine angetriebene Farbkastenwalze 17. Von der Farbkastenwalze 17 nimmt eine pendelartig hin- und herschwingende Heberwalze 16 frische Druckfarbe 19 ab und übergibt sie an einen kunststoffbeschichteten Farbreiber 15. Die Teile 15 bis 18 bilden die Farbzuführung.In a known manner, a driven ink fountain roller 17 dips into the printing ink 19 of an ink fountain 18 of a rotary offset printing machine. From the ink fountain roller 17, a pendulum-like reciprocating lifting roller 16 takes fresh printing ink 19 and transfers it to a plastic-coated ink fountain pen 15. The parts 15 to 18 form the ink supply.

Vom Farbreiber 15 führt der Farbfluß über eine gummibeschichtete Farbzuführwalze 14 auf eine kunststoffbeschichtete Verteilerwalze 12. Diese teilt den Farbfluß in zwei Farbströme auf, von denen der eine auf eine gummibeschichtete Abzweigwalze 11 und der andere auf eine gummibeschichtete Abzweigwalze 13 geführt wird. Der erste Teilfarbfluß wird über die Abzweigwalze 13 und eine Farbtransportwalze 8, die wahlweise als Reibwalze ausgebildet werden kann, auf zwei vordere Farbauftragwalzen 3, 4 geleitet. Der zweite Farbstrom wird über die Abzweigwalze 11 und eine Reibwalze 7 auf die erste Auftragwalze 3 der zwei vorderen Farbauftragwalzen 3, 4 (siehe Fig. 4) oder zusätzlich auf eine weitere Farbauftragwalze 2 geleitet, die in Drehrichtung des Plattenzylinders 1 gesehen der ersten Farbauftragwalze 3 der zwei vorderen Farbauftragwalzen 3, 4 vorgeschaltet ist (siehe Fig. 1 bis 3).From the ink fountain pen 15, the ink flow leads via a rubber-coated ink feed roller 14 to a plastic-coated distributor roller 12. This divides the ink flow into two ink streams, one of which is guided onto a rubber-coated branch roller 11 and the other onto a rubber-coated branch roller 13. The first partial ink flow is passed via the branch roller 13 and an ink transport roller 8, which can optionally be designed as a friction roller, to two front inking rollers 3, 4. The second ink flow is conducted via the branch roller 11 and a rubbing roller 7 onto the first application roller 3 of the two front ink application rollers 3, 4 (see FIG. 4) or additionally onto a further ink application roller 2 which, seen in the direction of rotation of the plate cylinder 1, of the first ink application roller 3 the two front inking rollers 3, 4 is connected upstream (see FIGS. 1 to 3).

Der zweiten Auftragwalze 4 der vorderen zwei Auftragwalzen 3, 4 folgt in Drehrichtung des Plattenzylinders 1 gesehen eine hintere Farbauftragwalze 5 und wahlweise eine weitere Farbauftragwalze 6. Die Farbauftragwalzen 5, 6 haben ebenfalls Rollkontakt mit der Druckplatte und sind ebenso wie die vorderen Farbauftragwalzen 2 bis 4 gummibeschichtet. Auf den Farbauftragwalzen 4 und 5 rollt eine kunststoffbeschichtete Reibwalze 9, auf den Farbauftragwalzen 5 und 6 ist eine kunststoffbeschichtete Farbtransportwalze 10 als Reiterwalze aufgesetzt.The second applicator roller 4 of the two front applicator rollers 3, 4 is followed by a rear inking roller 5 and, optionally, another inking roller 6, seen in the direction of rotation of the plate cylinder 1. The inking rollers 5, 6 also have rolling contact with the printing plate and, like the front inking rollers 2 to 4 rubber coated. A plastic-coated friction roller 9 rolls on the inking rollers 4 and 5, and there is one on the inking rollers 5 and 6 plastic-coated inking roller 10 placed as a rider roller.

Die Einfeuchtung der Druckplatte erfolgt wahlweise

  • 1. direkt über eine Feuchtauftragwalze 22 (Fig. 2 und 4) oder
  • 2. über die Farbauftragwalze 2 (Fig. 3).

Die Feuchtauftragwalze 22 bzw. die Farbauftragwalze 2 wird durch eine Feuchtmittelkastenwalze 20 über eine Zwischenwalze 21 mit Feuchtmittel versorgt.The pressure plate can be optionally moistened
  • 1. directly via a dampening roller 22 (FIGS. 2 and 4) or
  • 2. over the inking roller 2 (Fig. 3).

The dampening roller 22 or the inking roller 2 is supplied with dampening solution by a dampening solution box roller 20 via an intermediate roller 21.

Verändern sich durch die Feuchtmittelführung die Farbspaltungsverhältnisse im zweiten Teilfarbstrom dahingehend, daß die Farbspaltung behindert wird und damit der Farbmengenanteil des zweiten Teilfarbstromes sich verringert, vergrößert sich automatisch der Farbmengenanteil des ersten Teilfarbstromes um diesen Betrag. Es verringert sich der Farbübertragungsanteil der Farbauftragwalze 2 (gemäß Fig. 1 bis 3) bzw. auf die Farbauftragwalze 3 (gemäß Fig. 4). Die Farbübertragungsanteile der Farbauftragwalzen 3 bis 6 erhöhen sich zugleich um diesen Farbanteil, wobei die Abstufung der Farbübertragungsanteile der Farbauftragwalzen 3 bis 6 in Drehrichtung des Plattenzylinder 1 gesehen erhalten bleibt. Das Gesamtfarbgefälle im Farbwerk bleibt konstant und damit auch die Einstellung der Farbzufuhr ins Farbwerk, d.h. die Farbführung.If the ink splitting conditions in the second partial color stream change due to the dampening solution guidance in such a way that the color splitting is hindered and thus the proportion of ink quantity in the second partial color stream is reduced, the proportion of ink quantity in the first partial color stream is automatically increased by this amount. The ink transfer proportion of the inking roller 2 (according to FIGS. 1 to 3) or onto the inking roller 3 (according to FIG. 4) is reduced. The ink transfer components of the ink application rollers 3 to 6 increase at the same time by this ink component, the gradation of the ink transfer components of the ink application rollers 3 to 6 being retained in the direction of rotation of the plate cylinder 1. The overall color gradient in the inking unit remains constant and thus also the setting of the ink supply to the inking unit, the color scheme.

Die erfindungsgemäße Wirkung läßt sich in einer in der Zeichnung nicht dargestellten Weise verbessern, indem die erste Abzweigwalze 13 als changierende Reibwalze ausgebildet wird und/oder die erste Abzweigwalze 13 von den anliegenden Walzen 8, 12 an- und abstellbar bzw. taktmäßig gesteuert an-und abstellbar gelagert wird.The effect according to the invention can be improved in a manner not shown in the drawing, in that the first branch roller 13 is designed as an oscillating rubbing roller and / or the first branch roller 13 can be switched on and off or controlled in a clocked manner by the adjacent rollers 8, 12 is stored parkable.

Zur Optimierung der Einfärbung des Plattenzylinders 1 sind die Farbauftragwalzen 2 bis 5 in Drehrichtung des Plattenzylinders 1 gesehen, zur Übertragung folgender maximaler Farbanteile ausgelegt: Gemäß Fig. 2 1. Farbauftragwalze 2 32% 2. Farbauftragwalze 3 38% 3. Farbauftragwalze 4 26% 4. Farbauftragwalze 5 4% Gemäß Fig. 3 1. Farbauftragwalze 2 9% 2. Farbauftragwalze 3 49% 3. Farbauftragwalze 4 35% 4. Farbauftragwalze 5 7% Gemäß Fig. 4 1. Farbauftragwalze 3 62% 2. Farbauftragwalze 4 32% 3. Farbauftragwalze 5 6% In order to optimize the inking of the plate cylinder 1, the inking rollers 2 to 5 are seen in the direction of rotation of the plate cylinder 1, and are designed to transfer the following maximum ink components: 2 1.Inking roller 2 32% 2.Inking roller 3 38% 3.Inking roller 4 26% 4.Inking roller 5 4% 3 1.Inking roller 2 9% 2.Inking roller 3 49% 3.Inking roller 4 35% 4.Inking roller 5 7% 4 1.Inking roller 3 62% 2.Inking roller 4 32% 3. Ink application roller 5 6%

Die in Fig. 5 dargestellten Schemata zeigen jeweils einen Farbfluß zum Plattenzylinder 1 links in dem Falle, daß die Farbübertragung ungestört erfolgt und rechts in dem Falle, daß zugeführtes Feuchtmittel den Durchfluß in dem einen Teilstrom behindert, was eine Verlagerung der Durchflußmenge auf den anderen Teilstrom bewirkt.The schemes shown in Fig. 5 each show an ink flow to the plate cylinder 1 on the left in the event that the ink transfer takes place undisturbed and on the right in the case that dampening solution supplied hinders the flow in one partial flow, which means a shift in the flow rate to the other partial flow causes.

In Fig. 6 ist eine weitere Ausführungsform der Erfindung dargestellt, bei der ein paralleler Farbstrom der vorderen Farbauftragwalze vorgeschaltet ist.
Die Verteilerwalze 12 und die vordere Farbauftragwalze 3 stehen durch die im ersten Walzenzug vorgesehene Abzweigwalze 13 bzw. durch die im zweiten Walzenzug vorgesehene Abzweigwalze 11, ohne daß weitere Farbtransportwalzen zwischengeschaltet sind, miteinander unmittelbar in Verbindung.6 shows a further embodiment of the invention, in which a parallel ink flow is connected upstream of the front inking roller.
The distributor roller 12 and the front inking roller 3 stand by the branch roller provided in the first roller train 13 or by means of the branch roller 11 provided in the second roller train, without further ink transport rollers being interposed, in direct connection with one another.

BezugszeichenlisteReference symbol list

11
PlattenzylinderPlate cylinder
22nd
Farbauftragwalze, vorgeschalteteInk application roller, upstream
33rd
Farbauftragwalze, ersteInking roller, first
44th
Farbauftragwalze, zweiteInk roller, second
55
Farbauftragwalze, hintereInk roller, rear
66
Farbauftragwalze, hintereInk roller, rear
77
ReibwalzeGrater
88th
FarbtransportwalzeInk transport roller
99
FarbtransportwalzeInk transport roller
1010th
FarbtransportwalzeInk transport roller
1111
AbzweigwalzeBranch roller
1212
VerteilerwalzeDistributor roller
1313
AbzweigwalzeBranch roller
1414
FarbzuführwalzeInk feed roller
1515
FarbreiberPaint grater
1616
HeberwalzeLifter roller
1717th
DuktorwalzeDuct roller
1818th
FarbkastenPaint box
1919th
DruckfarbePrinting ink
2020th
FeuchtmittelkastenwalzeFountain solution roller
2121
ZwischenwalzeIntermediate roller
2222
FeuchtauftragwalzeDampening roller

Claims (9)

  1. Process for the application of offset printing ink and damping agent to the plate cylinder of a printing press by means of front and rear applicator rolls seen in the direction of rotation of the plate cylinder and by means of ink and damping agent metering preceding the applicator rolls, whereby the ink fed to the plate cylinder is fed in a main ink stream via the front applicator rolls to the plate cylinder, characterised in that the main ink stream is divided by parallel arranged and running ink feeding means into parallel partial streams, that the partial streams are reunited again and that the damping agent is essentially fed into one of the parallel partial ink streams.
  2. Inking unit for a rotary offset printing press in which the ink can be fed by means of an ink feed via a plurality of ink transport rolls to several ink applicator rolls lying against a plate cylinder, characterised in that a distributor roll (12) is connected on the one hand with the ink feed (15 - 18), that on the other hand the distributor roll (12) is connected in a first and in a second roll train arranged parallel to the first roll train via branch rolls (13, 11) with the exclusion of a further roll train for the further rear applicator rolls (4, 5, 6) with a front ink applicator roll (3), that from both of the parallel arranged roll trains one roll train is connected with the damping agent feed and that seen in the direction of rotation of the plate cylinder (1) an ink applicator roll (4) arranged after this front roll is connected at least with one further rear ink applicator roll (5) via an ink transport roll (9).
  3. Inking unit according to Claim 2, characterised in that one of the ink transport rolls arranged subsequently to the branch rolls (13, 11) is a vibrator roll (7) to which is arranged a further ink applicator roll (2) which, seen in the direction of rotation of the plate cylinder (1), is arranged upstream of the front ink applicator roll (3).
  4. Inking unit according to Claim 2 and 3, characterised in that one of the ink transport rolls (8) arranged subsequent to the branch rolls (13, 11) is constructed as a traversing vibrator roll.
  5. Inking unit according to Claim 2 to 4, characterised in that the branch roll (13) is constructed as a traversing vibrator roll.
  6. Inking unit according to Claim 2 to 4, characterised in that the branch roll (13) is mounted so that it can be thrown on and off one of the adjacently lying rolls (8, 12).
  7. Inking unit according to Claim 2 to 4, characterised in that the branch roll (13) is arranged so that it can be thrown on and off the adjacently lying rolls (8, 12) controlled cyclically.
  8. Inking unit according to Claim 2 to 7, characterised in that a damping agent source (20, 21) can be set against an ink applicator roll (2) in front of the front ink applicator roll (3).
  9. Inking unit according to Claim 2 to 7, characterised in that, seen in the direction of rotation of the plate cylinder (1), before the rolls (2 - 18) or (3 - 18), an inking unit (20, 21, 22) can be set against the plate cylinder (1).
EP88102256A 1987-02-28 1988-02-17 Inking unit for a rotary offset printing machine Expired - Lifetime EP0280957B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102256T ATE76812T1 (en) 1987-02-28 1988-02-17 INKING UNIT FOR A ROTARY OFFSET PRINTING PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3706602 1987-02-28
DE19873706602 DE3706602A1 (en) 1987-02-28 1987-02-28 INK FOR A ROTATIONAL OFFSET PRINTING MACHINE

Publications (3)

Publication Number Publication Date
EP0280957A2 EP0280957A2 (en) 1988-09-07
EP0280957A3 EP0280957A3 (en) 1990-01-31
EP0280957B1 true EP0280957B1 (en) 1992-06-03

Family

ID=6322059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102256A Expired - Lifetime EP0280957B1 (en) 1987-02-28 1988-02-17 Inking unit for a rotary offset printing machine

Country Status (6)

Country Link
US (1) US5003871A (en)
EP (1) EP0280957B1 (en)
JP (1) JP2612020B2 (en)
AT (1) ATE76812T1 (en)
BR (1) BR8800892A (en)
DE (2) DE3706602A1 (en)

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Publication number Priority date Publication date Assignee Title
JP2773316B2 (en) * 1989-11-08 1998-07-09 日本油脂株式会社 Heavy fuel oil composition
WO1991013761A1 (en) * 1990-03-03 1991-09-19 Albert-Frankenthal Aktiengesellschaft Short inking apparatus for a rotary press
JP2882968B2 (en) * 1993-04-22 1999-04-19 三菱重工業株式会社 Humidifier and method for offset printing press
DE19832722A1 (en) * 1998-07-21 2000-01-27 Roland Man Druckmasch Lifter inking unit for a printing press
DE19956149A1 (en) 1999-11-23 2001-06-07 Roland Man Druckmasch Inking unit for a printing press
DE10020510A1 (en) 2000-04-26 2001-11-15 Roland Man Druckmasch Dosing system for inking rollers in a printing machine
DE10248517B4 (en) 2002-10-17 2009-10-15 Manroland Ag Apparatus for color guidance in an offset printing machine
JP2006062363A (en) 2004-08-25 2006-03-09 Heidelberger Druckmas Ag Printing machine
CN101495315B (en) * 2006-05-23 2011-02-02 柯尼格及包尔公开股份有限公司 Inking unit of a rotary press, comprising a film roller
US8006617B2 (en) 2006-05-23 2011-08-30 Koenig & Bauer Aktiengesellschaft Assemblies in a printing couple of a rotary printing press
DE102008007679B4 (en) 2008-02-07 2016-05-25 manroland sheetfed GmbH Printing unit for a processing machine
DE102008009889A1 (en) 2008-02-19 2009-08-20 Manroland Ag Process for coloring a printing form in a processing machine
DE102008009890A1 (en) 2008-02-19 2009-08-20 Manroland Ag Process for coloring a printing form in a processing machine
DE102008009891A1 (en) 2008-02-19 2009-08-20 Manroland Ag Process for coloring a printing form in a processing machine
DE102008009892B4 (en) 2008-02-19 2015-04-02 manroland sheetfed GmbH Process for coloring a printing form in a processing machine
DE102008010803A1 (en) 2008-02-23 2009-08-27 Manroland Ag Process for coloring a printing form in a processing machine
DE102010028947A1 (en) 2010-05-12 2011-11-17 Manroland Ag Method for controlling processing machine for sheet material in offset printing machine, involves dying metering roller with printing inks in modes of operation, and contacting color feed roll temporarily with metering roller and unit roll
DE102011082129A1 (en) 2011-09-05 2013-03-07 manroland sheetfed GmbH Inking unit for use in offset processing machine, has ink transfer roller comprising vibration damper that is arranged in interior space, where ink transfer roller is in temporal contact with ink fountain roller and inking unit roller
DE102022126853A1 (en) 2022-10-14 2024-04-25 Koenig & Bauer Ag Printing unit with improved roller arrangement in the inking unit

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Also Published As

Publication number Publication date
JP2612020B2 (en) 1997-05-21
DE3706602A1 (en) 1988-09-08
BR8800892A (en) 1988-10-04
ATE76812T1 (en) 1992-06-15
DE3706602C2 (en) 1989-11-23
JPS63242548A (en) 1988-10-07
EP0280957A2 (en) 1988-09-07
EP0280957A3 (en) 1990-01-31
US5003871A (en) 1991-04-02
DE3871551D1 (en) 1992-07-09

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