EP0080588B1 - Inking and moistening device for an offset printing machine - Google Patents

Inking and moistening device for an offset printing machine Download PDF

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Publication number
EP0080588B1
EP0080588B1 EP82109406A EP82109406A EP0080588B1 EP 0080588 B1 EP0080588 B1 EP 0080588B1 EP 82109406 A EP82109406 A EP 82109406A EP 82109406 A EP82109406 A EP 82109406A EP 0080588 B1 EP0080588 B1 EP 0080588B1
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EP
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Prior art keywords
roller
inking
damping
plate cylinder
dampening
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Expired
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EP82109406A
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German (de)
French (fr)
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EP0080588A1 (en
Inventor
Hermann Beisel
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
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    • 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 application relates to a wet inking unit for offset printing machines according to the preamble of claim 1.
  • a known dampening system of this type (DE-A 28 45 932) discloses an immersion roller and a metering roller which are driven by a separate drive at a lower peripheral speed than the plate cylinder.
  • the metering roller interacts with a first friction roller with a rough chrome surface, which is already driven at the peripheral speed of the plate cylinder.
  • Both co-operating rollers have the same direction of rotation, so that the transfer of the dampening solution takes place in the opposite direction of movement of the roller surfaces.
  • the dampening roller in turn works together with a first applicator roller, seen in the direction of rotation of the plate cylinder, which transfers the dampening solution to the plate.
  • an intermediate roller is provided between the first and second applicator rollers.
  • a storage roller can be assigned to the dampening roller.
  • the disadvantage of the known design is that the supply and incorporation of the dampening solution into the ink takes place with the same dampening roller, so that repercussions on the metering roller and contamination with ink cannot be excluded at this point.
  • the opposite direction of movement of the roller surfaces of the metering roller and the friction roller requires precise adjustment in order to avoid unwanted wear of the roller surfaces.
  • FIG. 2 of DE-C 678 543 and DE-A 1411118 uses fewer rollers in the dampening unit, but is not able to supply the dampening solution to the inking unit and the plate cylinder so evenly distributed that a streak and stencil-free Pressure arises.
  • the metering roller works directly with an application roller; however, there is no provision of a paint / water emulsion before the wet film touches the plate for the first time, since no dampening roller is assigned to the applicator roller in question.
  • the metering roller in question also works directly with an applicator roller, which is additionally assigned an axially reciprocating buffer roller with a chrome surface for storing the dampening solution which is not currently required.
  • This buffer roller touches the application roller in question in the direction of rotation thereof at a point which lies in front of the contact point of the application roller with the metering roller.
  • PCT No. WO 81/01266 shows a special inking unit with only one inking roller, to which three ink storage rollers are additionally assigned. These ink storage rollers are used only for comparing the ink film on the inking roller and do not influence the dampening solution film supplied.
  • the object of the invention is to design a dampening system for offset printing presses with the least technical effort so that an optimal supply of dampening solution to the printing plate is ensured without stenciling on the printed image being caused by the dampening system.
  • a major advantage of the invention is that the dampening solution is incorporated into the ink film a second time with the additional friction roller. With the assignment of the distribution roller to the application roller after the dampening solution has been applied, a favorable ink-water emulsion is achieved and the rough chrome surface of the distribution roller prevents water wedge formation between the distribution roller and application roller. The known stenciling effects caused by the dampening solution application via an inking roller are demonstrably avoided.
  • the solution to the problem according to claim 2 has the further advantage that the drive of the additional friction roller and the first applicator roller between the two rollers achieves a different peripheral speed, so that after the dampening solution is rolled in by the metering roller, a particularly intensive advantage Incorporation takes place through the friction roller.
  • a plate cylinder 1, a rubber cylinder 2 and a printing cylinder 3 interact in a known manner.
  • the sheets to be printed are fed from a transfer drum 4 to the printing cylinder 3 and removed from a further transfer drum 5.
  • the sheet receives its imprint between blanket cylinder 2 and impression cylinder 3.
  • the plate cylinder 1 is colored in a known manner via an inking unit 6 Seen plate cylinder 1, in front of the inking unit 6, a dampening unit 7 is provided, the details of which are described below.
  • the dampening solution 9 is present in a dampening solution container 8, in which an immersion roller 10 rotates and is wetted by the latter (FIG. 2).
  • the dip roller 10 is mounted in a known manner stationary in the machine side frames, not shown.
  • the surface of the dipping roller is elastic and can e.g. are made of rubber.
  • a dosing roller 11 cooperates with the dipping roller 10 and is provided with a smooth chrome surface and e.g. is pivotally mounted about the dip roller 10 via lever 18.
  • the mounting of the metering roller 11 is designed such that the distance between the two rollers can be adjusted via eccentric bushes 19, so that the thickness of the dampening solution film on the metering roller 11 can be changed.
  • the metering roller 11 interacts with the first application roller 12 as seen in the direction of rotation of the plate cylinder 1, which in turn is connected to the application roller 14 via a non-driven intermediate roller 13. This and the next applicator roller 15 rest against an inking roller 16.
  • the first applicator roller 12 is seen in the direction of rotation of the same after the point of contact with the metering roller 11 a stationary in the side frames and driven at the peripheral speed of the plate cylinder 1 driven dampening roller 17.
  • the rollers 12 to 17 all rotate at the peripheral speed of the plate cylinder 1, there is a speed difference between the applicator roller 12 and the metering roller 11, by means of which the amount of dampening solution supplied can be changed.
  • the dampening roller 17 is provided with a roughened chrome jacket surface and supports the drive of the application roller 12 provided with an elastic jacket surface.
  • the dampening roller 17 intensively incorporates the dampening film supplied by the metering roller 11 into the ink film already present on the jacket surface of the application roller 12 , so that a favorable color-water emulsion is achieved.
  • the application roller 12 can be pivoted about the dampening roller 17 via levers 20 provided on both sides, so that it can be lifted off the surface of the plate cylinder 1.
  • the metering roller 11 is first lifted off the applicator roller 12 via a pneumatic cylinder 21 and a connecting rod 22, so that the dampening solution supply is interrupted. Then the applicator roller 12 is lifted from the plate cylinder 1, delayed by the elongated hole 23. To set the dampening unit, the metering roller 11 is first placed against the applicator roller 12 and then the applicator roller 12 is placed against the plate cylinder by the metering roller 11.
  • the intermediate roller 13 is placed on the applicator roller 14 by means of a lever 24 and a compression spring 25 and adjusted to the applicator roller 12 by means of adjusting screw 26, the intermediate roller 13 resiliently abutting the applicator roller 14 in the engaged state.
  • the application roller 12 can be adjusted via eccentric bushes 27 relative to the dampening roller 17 and by means of adjusting screws 28 relative to the metering roller 11.
  • the application roller 12 can be adjusted relative to the plate cylinder 1 by means of the stop screw 29.
  • the dipping roller 10 is formed on its outer surface of elastic material in the longitudinal direction slightly spherical, so that a uniform distribution of the dampening solution is ensured over the length of the roller.
  • the dampening roller 17 assigned to the application roller 12 prevents the formation of water wedges between the latter and the application roller 12 with the rough chrome surface.
  • the lateral back and forth movement of the dampening roller 17 and the rolling movement improves the incorporation of the dampening solution in the ink film and demonstrably shows a stenciling appearance on the Avoided print image.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coating Apparatus (AREA)
  • Reinforced Plastic Materials (AREA)
  • Polarising Elements (AREA)
  • Golf Clubs (AREA)

Description

Die Anmeldung bezieht sich auf ein Feucht-Farbwerk für Offset-Druckmaschinen gemäß dem Oberbegriff des Anspruchs 1.The application relates to a wet inking unit for offset printing machines according to the preamble of claim 1.

Ein bekanntes Feuchtwerk dieser Art (DE-A 28 45 932) offenbart eine Tauchwalze und eine Dosierwalze, die über einen separaten Antrieb mit geringerer Umfangsgeschwindigkeit angetrieben werden als der Plattenzylinder. Die Dosierwalze wirkt bei der bekannten Ausführung mit einer ersten Reibwalze mit rauher Chromoberfläche zusammen, die bereits mit Umfangsgeschwindigkeit des Plattenzylinders angetrieben ist. Beide zusammenwirkenden Walzen haben gleiche Drehrichtung, so daß die Ubergabe des Feuchtmittels bei entgegengesetzter Bewegungsrichtung der Walzenoberflächen erfolgt. Die Feuchtreibwalze wiederum arbeitet mit einer,in Drehrichtung des Plattenzylinders gesehen,ersten Auftragwalze zusammen, die das Feuchtmittel auf die Platte überträgt. Bei der bekannten Ausführung des Feuchtwerks ist zwischen der ersten und zweiten Auftragwalze eine Zwischenwalze vorgesehen. Je nach Einsatz des Feuchtwerks kann der Feuchtreibwalze eine Speicherwalze zugeordnet sein.A known dampening system of this type (DE-A 28 45 932) discloses an immersion roller and a metering roller which are driven by a separate drive at a lower peripheral speed than the plate cylinder. In the known embodiment, the metering roller interacts with a first friction roller with a rough chrome surface, which is already driven at the peripheral speed of the plate cylinder. Both co-operating rollers have the same direction of rotation, so that the transfer of the dampening solution takes place in the opposite direction of movement of the roller surfaces. The dampening roller in turn works together with a first applicator roller, seen in the direction of rotation of the plate cylinder, which transfers the dampening solution to the plate. In the known embodiment of the dampening system, an intermediate roller is provided between the first and second applicator rollers. Depending on the use of the dampening unit, a storage roller can be assigned to the dampening roller.

Der Nachteil der bekannten Ausführung ist, daß die Zufuhr und Einarbeitung des Feuchtmittels in die Farbe mit der gleichen Feuchtreibwalze erfolgt, so daß Rückwirkungen auf die Dosierwalze und Verschmutzung mit Farbe an dieser Stelle nicht auszuschließen sind. Außerdem erfordert die entgegengesetzte Bewegungsrichtung der Walzenoberflächen der Dosierwalze und der Reibwalze eine genaue Einstellung, um eine ungewollte Abnutzung der Walzenoberflächen zu vermeiden.The disadvantage of the known design is that the supply and incorporation of the dampening solution into the ink takes place with the same dampening roller, so that repercussions on the metering roller and contamination with ink cannot be excluded at this point. In addition, the opposite direction of movement of the roller surfaces of the metering roller and the friction roller requires precise adjustment in order to avoid unwanted wear of the roller surfaces.

Eine andere bekannte Ausführung (Fig. 2 der DE-C 678 543 und die DE-A 1411118) verwendet im Feuchtwerk zwar weniger Walzen, vermag dadurch aber nicht das Feuchtmittel so gleichmäßig verteilt dem Farbwerk und dem Plattenzylinder zuzuführen, daß ein streifen- und schablonierfreier Druck entsteht. Bei dieser bekannten Ausführung arbeitet zwar die Dosierwalze unmittelbar mit einer Auftragwalze zusammen; die Bereitstellung einer Farb-Wasseremulsion vor der ersten Berührung des Feuchtfilms mit der Platte ist jedoch nicht gegeben, da der betreffenden Auftragwalze keine Feuchtreibwalze zugeordnet ist.Another known embodiment (Fig. 2 of DE-C 678 543 and DE-A 1411118) uses fewer rollers in the dampening unit, but is not able to supply the dampening solution to the inking unit and the plate cylinder so evenly distributed that a streak and stencil-free Pressure arises. In this known embodiment, the metering roller works directly with an application roller; however, there is no provision of a paint / water emulsion before the wet film touches the plate for the first time, since no dampening roller is assigned to the applicator roller in question.

Bei einer weiteren bekannten Ausführung gemäß der GB-A-2 035 903 arbeitet die betreffende Dosierwalze ebenfalls unmittelbar mit einer Auftragwalze zusammen, der zusätzlich eine axial hin- und herbewegbare Pufferwalze mit einer Chromoberfläche zur Speicherung des momentan nicht benötigten Feuchtmittels zugeordnet ist. Diese Pufferwalze berührt dabei die betreffende Auftragwalze in Drehrichtung derselben gesehen an einer Stelle, die vor der Kontaktstelle der Auftragwalze mit der Dosierwalze liegt.In a further known embodiment according to GB-A-2 035 903, the metering roller in question also works directly with an applicator roller, which is additionally assigned an axially reciprocating buffer roller with a chrome surface for storing the dampening solution which is not currently required. This buffer roller touches the application roller in question in the direction of rotation thereof at a point which lies in front of the contact point of the application roller with the metering roller.

Eine andere bekannte Ausführung (PCT-Nr. WO 81/01266) zeigt ein spezielles Farbwerk mit nur einer Farbauftragwalze, der zusätzlich drei Farbspeicherwalzen zugeordnet sind. Diese Farbspeicherwalzen dienen ausschließlich der Vergleich-mäßigung des Farbfilmes auf der Farbauftragwalze und beeinflussen den zugeführten Feuchtmittelfilm nicht.Another known version (PCT No. WO 81/01266) shows a special inking unit with only one inking roller, to which three ink storage rollers are additionally assigned. These ink storage rollers are used only for comparing the ink film on the inking roller and do not influence the dampening solution film supplied.

Aufgabe der Erfindung ist es, ein Feuchtwerk für Offset-Druckmaschinen mit geringstem technischen Aufwand so auszubilden, daß eine optimale Feuchtmittelzufuhr zur Druckplatte gewährleistet ist, ohne daß Schabloniererscheinungen auf dem Druckbild durch das Feuchtwerk verursacht werden können.The object of the invention is to design a dampening system for offset printing presses with the least technical effort so that an optimal supply of dampening solution to the printing plate is ensured without stenciling on the printed image being caused by the dampening system.

Die Aufgabe wird gemäß dem Kennzeichen des Anspruchs 1 gelöst. Ein wesentlicher Vorteil der Erfindung ist es, daß mit der zusätzlichen Reibwalze eine zweite Einarbeitung des Feuchtmittels in den Farbfilm erfolgt. Mit der Zuordnung der Reibwalze zur Auftragwalze nach dem Aufbringen des Feuchtmittels wird eine günstige Farb-Wasseremulsion erreicht und durch die rauhe Chromoberfläche der Reibwalze kann keine Wasserkeilbildung zwischen Reibwalze und Auftragwalze entstehen. Die bekannten Schabloniererscheinungen durch den Feuchtmittelauftrag über eine Farbauftragwalze werden nachweislich vermieden.The object is achieved according to the characterizing part of claim 1. A major advantage of the invention is that the dampening solution is incorporated into the ink film a second time with the additional friction roller. With the assignment of the distribution roller to the application roller after the dampening solution has been applied, a favorable ink-water emulsion is achieved and the rough chrome surface of the distribution roller prevents water wedge formation between the distribution roller and application roller. The known stenciling effects caused by the dampening solution application via an inking roller are demonstrably avoided.

Die Lösung der Aufgabe gemäß Anspruch 2 hat neben den bereits aufgeführten Vorteilen den weiteren Vorteil, daß durch den Antrieb der zusätzlichen Reibwalze und der ersten Auftragwalze zwischen beiden Walzen eine unterschiedliche Umfangsgeschwindigkeit erreicht wird, so daß nach dem Einwalzen des Feuchtmittels durch die Dosierwalze eine besonders intensive Einarbeitung durch die Reibwalze erfolgt.The solution to the problem according to claim 2 has the further advantage that the drive of the additional friction roller and the first applicator roller between the two rollers achieves a different peripheral speed, so that after the dampening solution is rolled in by the metering roller, a particularly intensive advantage Incorporation takes place through the friction roller.

Die Unteransprüche geben vorteilhafte Ausgestaltungen des Erfindungsgegenstandes wieder, die ein einfaches An- und Abstellen der Feuchtwerkswalzen und eine gleichmäßige Verteilung des Feuchtmittels über die ganze Walzenlänge gewährleisten.The subclaims give advantageous refinements of the subject matter of the invention, which ensure simple turning on and off of the dampening roller and a uniform distribution of the dampening solution over the entire length of the roller.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt. Es zeigt:

  • Fig. 1 eine Seitenansicht eines Offset-Druckwerks
  • Fig. 2 einen Querschnitt des erfindungsgemäßen Feuchtwerks
  • Fig. 3 ein Walzenschema des Feuchtwerks gemäß Anspruch 2.
An embodiment of the invention is shown schematically in the drawings. It shows:
  • Fig. 1 is a side view of an offset printing unit
  • Fig. 2 shows a cross section of the dampening system according to the invention
  • 3 shows a roller diagram of the dampening unit according to claim 2.

Bei dem in Figur 1 dargestellten Farbwerk einer Offset-Druckmaschine wirken in bekannter Weise ein Plattenzylinder 1, ein Gummizylinder 2 und ein Druckzylinder 3 zusammen. Die zu bedruckenden Bogen werden von einer Überführtrommel 4 dem Druckzylinder 3 zugeführt und von einer weiteren Überführtrommel 5 abgeführt. Der Bogen erhält hierbei zwischen Gummizylinder 2 und Druckzylinder 3 seinen Aufdruck. Das Einfärben des Plattenzylinders 1 erfolgt in bekannter Weise über ein Farbwerk 6. In Drehrichtung des Plattenzylinders 1 gesehen, vor dem Farbwerk 6, ist ein Feuchtwerk 7 vorgesehen, dessen Einzelheiten nachfolgend beschrieben werden.In the inking unit of an offset printing press shown in FIG. 1, a plate cylinder 1, a rubber cylinder 2 and a printing cylinder 3 interact in a known manner. The sheets to be printed are fed from a transfer drum 4 to the printing cylinder 3 and removed from a further transfer drum 5. The sheet receives its imprint between blanket cylinder 2 and impression cylinder 3. The plate cylinder 1 is colored in a known manner via an inking unit 6 Seen plate cylinder 1, in front of the inking unit 6, a dampening unit 7 is provided, the details of which are described below.

In einem Feuchtmittelbehälter 8 ist das Feuchtmittel 9 vorhanden, in dem sich eine Tauchwalze 10 dreht und von diesem benetzt wird (Fig. 2). Die Tauchwalze 10 ist in bekannter Weise stationär in den nicht dargestellten Maschinenseitengestellen gelagert. Die Oberfläche der Tauchwalze ist elastisch und kann z.B. aus Gummi bestehen. Mit der Tauchwalze 10 wirkt eine Dosierwalze 11 zusammen, die mit einer glatten Chromoberfläche versehen ist und z.B. über Hebel 18 um die Tauchwalze 10 schwenkbar gelagert ist. Die Lagerung der Dosierwalze 11 ist so ausgebildet, daß der Abstand zwischen beiden Walzen über Exzenterbüchsen 19 eingestellt werden kann, so daß die Dicke des Feuchtmittelfilms auf der Dosierwalze 11 veränderbar ist. Die Tauchwalze 10 und die Dosierwalze 11 sind über nicht dargestellte Stirnräder gekoppelt und werden über einen eigenen Antrieb mit geringerer Umfangsgeschwindigkeit als der Plattenzylinder 1 angetrieben. Die Umfangsgeschwindigkeit beider Walzen ist über den Antrieb frei regelbar, wobei die jeweils eingestellte Geschwindigkeit konstant eingehalten wird.The dampening solution 9 is present in a dampening solution container 8, in which an immersion roller 10 rotates and is wetted by the latter (FIG. 2). The dip roller 10 is mounted in a known manner stationary in the machine side frames, not shown. The surface of the dipping roller is elastic and can e.g. are made of rubber. A dosing roller 11 cooperates with the dipping roller 10 and is provided with a smooth chrome surface and e.g. is pivotally mounted about the dip roller 10 via lever 18. The mounting of the metering roller 11 is designed such that the distance between the two rollers can be adjusted via eccentric bushes 19, so that the thickness of the dampening solution film on the metering roller 11 can be changed. The dipping roller 10 and the metering roller 11 are coupled via spur gears (not shown) and are driven by their own drive at a lower peripheral speed than the plate cylinder 1. The circumferential speed of both rollers can be freely controlled via the drive, the speed set in each case being kept constant.

Die Dosierwalze 11 wirkt mit der in Drehrichtung des Plattenzylinders 1 gesehen ersten Auftragwalze 12 zusammen, die wiederum über eine nicht angetriebene Zwischenwatze 13 mit der Auftragwalze 14 verbunden ist. Diese sowie die nächstfolgende Auftragwalze 15 liegen an einer Farbreibwalze 16 an.The metering roller 11 interacts with the first application roller 12 as seen in the direction of rotation of the plate cylinder 1, which in turn is connected to the application roller 14 via a non-driven intermediate roller 13. This and the next applicator roller 15 rest against an inking roller 16.

Der ersten Auftragwalze 12 ist in Drehrichtung derselben gesehen nach der Kontaktstelle mit der Dosierwalze 11 eine ortsfest in den Seitengestellen gelagerte und mit der Umfangsgeschwindigkeit des Plattenzylinders 1 angetriebene Feuchtreibwalze 17 zugeordnet. Nachdem somit in diesem Ausführungsbeispiel die Walzen 12 bis 17 alle mit der Umfangsgeschwindigkeit des Plattenzylinders 1 drehen, besteht zwischen der Auftragwalze 12 und der Dosierwalze 11 eine Geschwindigkeitsdifferenz, über die die Menge des zugeführten Feuchtmittels verändert werden kann.The first applicator roller 12 is seen in the direction of rotation of the same after the point of contact with the metering roller 11 a stationary in the side frames and driven at the peripheral speed of the plate cylinder 1 driven dampening roller 17. Thus, in this exemplary embodiment, since the rollers 12 to 17 all rotate at the peripheral speed of the plate cylinder 1, there is a speed difference between the applicator roller 12 and the metering roller 11, by means of which the amount of dampening solution supplied can be changed.

Die Feuchtreibwalze 17 ist mit einer aufgerauhten Chrommantelfläche versehen und unterstützt den Antrieb der mit einer elastischen Mantelfläche versehenen Auftragwalze 12. Außerdem arbeitet die Feuchtreibwalze 17 mit ihrer rauhen Chromoberfläche den von der Dosierwalze 11 zugeführten Feuchtmittelfilm inden bereits auf der Mantelfläche der Auftragwalze 12 vorhandenen Farbfilm intensiv ein, so daß eine günstige Farb- Wasseremulsion erreicht wird.The dampening roller 17 is provided with a roughened chrome jacket surface and supports the drive of the application roller 12 provided with an elastic jacket surface. In addition, with its rough chrome surface, the dampening roller 17 intensively incorporates the dampening film supplied by the metering roller 11 into the ink film already present on the jacket surface of the application roller 12 , so that a favorable color-water emulsion is achieved.

Die Auftragwalze 12 ist über beiderseits vorgesehene Hebel 20 um die Feuchtreibwalze 17 schwenkbar, so daß sie von der Oberfläche des Plattenzylinders 1 abgehoben werden kann. Über einen Pneumatikzylinder 21 und eine Verbindungsstange 22 wird die Dosierwalze 11 zunächst von der Auftragwalze 12 abgehoben,so daß die Feuchtmittelzufuhr unterbrochen ist. Danach erfolgt das Abheben der Auftragwalze 12, durch das Langloch 23 verzögert, vom Plattenzylinder 1. Zum Anstellen des Feuchtwerkes wird die Dosierwalze 11 zunächst an die Auftragwalze 12 angestellt und sodann die Auftragwalze 12 von der Dosierwalze 11 an den Plattenzylinder angestellt. Die Zwischenwalze 13 wird über einen Hebel 24 und eine Druckfeder 25 an die Auftragwalze 14 angestellt und mittels Stellschraube26 zu der Auftragwalze 12 eingestellt, wobei die Zwischenwalze 13 im angestellten Zustand federnd an der Auftragwalze 14 anliegt. Die Auftragwalze 12 läßt sich über Exzenterbüchsen 27 gegenüber der Feuchtreibwalze 17 und mittels Stellschrauben 28 gegenüber der Dosierwalze 11 einstellen. Über die Anschlagschraube 29 läßt sich die Auftragwalze 12 gegenüber dem Plattenzylinder 1 einstellen.The application roller 12 can be pivoted about the dampening roller 17 via levers 20 provided on both sides, so that it can be lifted off the surface of the plate cylinder 1. The metering roller 11 is first lifted off the applicator roller 12 via a pneumatic cylinder 21 and a connecting rod 22, so that the dampening solution supply is interrupted. Then the applicator roller 12 is lifted from the plate cylinder 1, delayed by the elongated hole 23. To set the dampening unit, the metering roller 11 is first placed against the applicator roller 12 and then the applicator roller 12 is placed against the plate cylinder by the metering roller 11. The intermediate roller 13 is placed on the applicator roller 14 by means of a lever 24 and a compression spring 25 and adjusted to the applicator roller 12 by means of adjusting screw 26, the intermediate roller 13 resiliently abutting the applicator roller 14 in the engaged state. The application roller 12 can be adjusted via eccentric bushes 27 relative to the dampening roller 17 and by means of adjusting screws 28 relative to the metering roller 11. The application roller 12 can be adjusted relative to the plate cylinder 1 by means of the stop screw 29.

Die Tauchwalze 10 ist auf ihrer Mantelfläche aus elastischem Material in Längsrichtung leicht ballig ausgebildet, so daß eine gleichmäßige Verteilung des Feuchtmittels über die Walzenlänge sichergestellt ist.The dipping roller 10 is formed on its outer surface of elastic material in the longitudinal direction slightly spherical, so that a uniform distribution of the dampening solution is ensured over the length of the roller.

Die der Auftragwalze 12 zugeordnete Feuchtreibwalze 17 verhindert mit der rauhen Chromoberfläche eine Wasserkeilbildung zwischen dieser und der Auftragwalze 12. Durch die seitliche Hin- und Herbewegung der Feuchtreibwalze 17 und durch die Abwälzbewegung wird das Einarbeiten des Feuchtmittels in dem Farbfilm verbessert und nachweislich eine Schabloniererscheinung auf dem Druckbild vermieden.The dampening roller 17 assigned to the application roller 12 prevents the formation of water wedges between the latter and the application roller 12 with the rough chrome surface. The lateral back and forth movement of the dampening roller 17 and the rolling movement improves the incorporation of the dampening solution in the ink film and demonstrably shows a stenciling appearance on the Avoided print image.

Das Schema des Feuchtwerks gemäß Fig. 3 unterscheidet sich ge8enüber der Ausführung gemäß Fig. 2 nur dadurch, daß die über einem nicht gezeigten Antrieb angetriebene Feuchtreibwalze 17 ein im Durchmesser kleineres Stirnrad 30 trägt, das mit einem auf der Auftragwalze 12 angeordneten Stirnrad 31 kämmt, dessen Durchmesser größer als der Walzendurchmesser ist. Die Feuchtreibwalze 17 wird um den der Stirnraduntersetzung entsprechenden Betrag schneller angetrieben, so daß die Auftragwalze 12 mit Plattenzylinderumfangsgeschwindigkeit dreht. Die Differenzgeschwindigkeit zwischen den Mantelflächen der Auftragwalze 12 und der Feuchtreibwalze 17 verbessern noch das Einarbeiten des Feuchtmittels in den Farbfilm.3 differs from the embodiment according to FIG. 2 only in that the dampening roller 17, which is driven by a drive (not shown), carries a spur gear 30 with a smaller diameter, which meshes with a spur gear 31 arranged on the application roller 12. whose diameter is larger than the roller diameter. The dampening roller 17 is driven faster by the amount corresponding to the spur gear reduction, so that the application roller 12 rotates at the plate cylinder peripheral speed. The difference in speed between the outer surfaces of the application roller 12 and the dampening roller 17 still improve the incorporation of the dampening solution into the ink film.

Claims (7)

1. Damping-inking unit for offset printing presses for forming and feeding an ink-water emulsion to a plate cylinder with more than one inking roller, of which, as viewed in the direction of rotation of the plate cylinder (1), the first and second inking rollers (12 and 14) are connected to each other through an intermediate roller (13), and with a fountain roller (10) in a damping-solution tank (8) and a metering roller (11). from which the damping solution is transferred directly to the first inking roller (12), wherein the first inking roller (12) is assigned a damping distributor roller (17),said distributor roller having a rough chrome outer cylindrical surface and being driven at the circumferential speed of the plate cylinder, and wherein the contact point of the damping_ distributor roller (17) with the inking roller (12) is, as viewed in the direction of rotation of the latter, after the contact point with the damping-solution roller (11).
2. Damping-inking unit for offset printing presses for forming and feeding an ink-water emulsion to a platecylinder with more than one inking roller, of which, as viewed in the direction of rotation of the plate cylinder (1), the first and second inking rollers (12 and 14) are connected to each other through an intermediate roller (13), and with a fountain roller (10) in a damping-solution tank (8) and a metering roller (11), from which the damping solution is transferred directly to the first inking roller (12), wherein, the first inking roller (12) is assigned a damping distributor roller (17) driven at a higher speed than the plate cylinder (1), and wherein the inking roller (12) is driven at the circumferential speed of the plate cylinder by the damping distributor roller (17) through a step-down drive (30, 31), and wherein the contact point of the damping distributor roller (17) with the inking roller (12) is, as viewed in the direction of rotation of the latter, after the contact point with the damping-solution roller (11).
3. Damping-inking unit according to Claim 1 or 2, wherein the first inking roller (12) and the metering roller (11) are swivellable about the stationary damping distributor roller (17) and the stationary fountain roller (10), respectively, and are adjustable with respect to the latter, and wherein, when engaging, the metering roller (11) is pivoted first of all against the first inking roller (12) and, through its further motion, brings the inking roller (12) into engagement with the plate cylinder (1).
4. Damping-inking unit according to Claims 1 and 2, wherein the fountain roller (10) exhibits an outer cylindrical surface of elastic material and is of slightly convex form in its longitudinal direction.
EP82109406A 1981-11-21 1982-10-12 Inking and moistening device for an offset printing machine Expired EP0080588B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3146223 1981-11-21
DE3146223A DE3146223C2 (en) 1981-11-21 1981-11-21 Moist inking unit for offset printing machines

Publications (2)

Publication Number Publication Date
EP0080588A1 EP0080588A1 (en) 1983-06-08
EP0080588B1 true EP0080588B1 (en) 1986-03-19

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EP82109406A Expired EP0080588B1 (en) 1981-11-21 1982-10-12 Inking and moistening device for an offset printing machine

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US (1) US4440081A (en)
EP (1) EP0080588B1 (en)
JP (2) JPS5894465A (en)
AT (1) AT384778B (en)
AU (1) AU555974B2 (en)
CA (1) CA1195179A (en)
DE (2) DE3146223C2 (en)
DK (1) DK154195C (en)
ES (1) ES8307592A1 (en)
MX (1) MX157582A (en)
NO (1) NO158453C (en)
ZA (1) ZA827727B (en)

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CN103358663A (en) * 2013-07-09 2013-10-23 上海光华印刷机械有限公司 Arranging structure of ink painting system of printer

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DE102004021328B4 (en) * 2003-05-28 2014-01-30 Heidelberger Druckmaschinen Ag Method for operating a printing press
CN103358663A (en) * 2013-07-09 2013-10-23 上海光华印刷机械有限公司 Arranging structure of ink painting system of printer
CN103358663B (en) * 2013-07-09 2015-03-11 上海光华印刷机械有限公司 Arranging structure of ink painting system of printer

Also Published As

Publication number Publication date
DE3146223A1 (en) 1983-06-01
ATA400882A (en) 1987-06-15
JPH0236387B2 (en) 1990-08-16
MX157582A (en) 1988-12-02
DK154195C (en) 1989-03-28
DE3146223C2 (en) 1985-03-21
EP0080588A1 (en) 1983-06-08
AU555974B2 (en) 1986-10-16
CA1195179A (en) 1985-10-15
NO823889L (en) 1983-05-24
NO158453C (en) 1988-09-14
JPS5894465A (en) 1983-06-04
DK505582A (en) 1983-05-22
NO158453B (en) 1988-06-06
US4440081A (en) 1984-04-03
ES517510A0 (en) 1983-08-16
ES8307592A1 (en) 1983-08-16
AU9034782A (en) 1983-05-26
ZA827727B (en) 1983-08-31
DK154195B (en) 1988-10-24
JPH03250A (en) 1991-01-07
DE3270005D1 (en) 1986-04-24
JPH0451348B2 (en) 1992-08-18
AT384778B (en) 1988-01-11

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