EP0774353A1 - Offset printing machine - Google Patents

Offset printing machine Download PDF

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Publication number
EP0774353A1
EP0774353A1 EP96114865A EP96114865A EP0774353A1 EP 0774353 A1 EP0774353 A1 EP 0774353A1 EP 96114865 A EP96114865 A EP 96114865A EP 96114865 A EP96114865 A EP 96114865A EP 0774353 A1 EP0774353 A1 EP 0774353A1
Authority
EP
European Patent Office
Prior art keywords
roller
inking
dampening
levers
intermediate roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96114865A
Other languages
German (de)
French (fr)
Other versions
EP0774353B1 (en
Inventor
Rudi Junghans
Hermann Beisel
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication of EP0774353A1 publication Critical patent/EP0774353A1/en
Application granted granted Critical
Publication of EP0774353B1 publication Critical patent/EP0774353B1/en
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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
    • 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

Definitions

  • the invention relates to an offset printing machine with an inking and a dampening unit, which are assigned to a plate cylinder, with at least one intermediate roller that connects ink-driven and dampening application rollers driven by friction, the intermediate roller being supported on both sides and by means of adjusting means to form an inking and / or or a dampening roller is adjustable.
  • the object of the present invention is to reduce the stenciling on the first inking roller in a separate mode of operation between the inking and dampening units, so that even difficult printing work can be carried out.
  • the object is achieved in that the intermediate roller is mounted on swivel levers on both sides, in such a way that it remains in rolling contact with the first inking roller when it is being adjusted and that it is lifted off the dampening roller when it is switched off.
  • the intermediate roller if the intermediate roller is lifted off the dampening roller so that the dampening unit is separated from the inking unit, the intermediate roller remains in rolling contact with the first inking roller and can even out the ink film returning from the plate on the inking roller and thus largely prevent stenciling.
  • the dampening system can work independently Wet the printing plate from the inking unit.
  • the dampening roller can be driven at different speeds to the plate cylinder.
  • An advantageous embodiment of the invention is characterized in that pivot levers are arranged on both sides of the bearings of the first inking roller, in which the intermediate roller is mounted and that adjusting means are assigned to the pivot levers.
  • the intermediate roller thus pivots around the first inking roller, so that it always remains in contact with the inking roller when it is set down by the dampening roller.
  • a further advantageous embodiment of the invention is characterized in that pivot levers are mounted on both sides of the bearings of the dampening application roller, to which actuating means are assigned, that pivot levers are pivotally attached to the pivot levers, on which the intermediate roller is mounted and that couplings act on the bearings of the intermediate roller , which are pivotally mounted on both sides on the bearings of the first inking roller.
  • the couplings ensure the permanent contact of the intermediate roller with the first inking roller, so that contact with the first inking roller is maintained when the same is turned off.
  • adjusting means are provided on the coupling which engage the bearings of the intermediate roller in order to adjust the distance between the intermediate roller and the first inking roller.
  • Another variant of the storage of the intermediate roller is characterized in that pivot levers are mounted on both sides of the bearings of the dampening roller, the Adjustment means are assigned that bearing levers are pivotally attached to the pivot levers, on which the intermediate roller is mounted, and that compression springs are assigned to the bearing levers, which position the intermediate roller against the first inking roller, the compression springs being held by support bodies which are attached to the pivot levers .
  • a play-free adjustment of the intermediate roller to the first inking roller can be ensured by the compression springs, the pressure of the compression springs determining the contact force. Even when the intermediate roller is parked, when it is lifted off the first dampening roller, the adjustment to the first inking roller is not affected.
  • Another embodiment of the invention is characterized in that pivot levers are mounted on both sides of the bearings of the dampening roller, to which actuating means are assigned that guides are provided on the pivot levers in which the bearings of the intermediate roller are slidably guided and that the guides are at an angle alpha are arranged to the first inking roller, so that the contact pressure of the intermediate roller on the first inking roller is greater than the contact pressure of the intermediate roller on the dampening roller.
  • the intermediate roller is also driven by the first inking roller in the adjusted position, regardless of the speed at which the dampening roller is driven.
  • an inking unit 2 and a dampening unit 3 are assigned to the plate cylinder 1.
  • An intermediate roller 4 connects the dampening roller 5 to the first inking roller 6.
  • the dampening roller 5 is assigned a drive roller 7 which drives the dampening roller 5 and prevents the dampening roller 5 from being stenciled.
  • the intermediate roller 4 can be mounted on both sides on pivot levers, which in turn are arranged on the bearings of the first inking roller 6, so that the intermediate roller 4 pivots when it is turned around the first inking roller and remains in rolling contact with the latter.
  • the intermediate roller 4 is lifted off the dampening roller 5.
  • the intermediate roller 4 is supported on both sides via pivot levers 8 on the bearing of the dampening roller 5.
  • the pivoting lever 8 in turn is assigned adjusting means 9 with which the intermediate roller 4 can be switched off by the dampening roller 5.
  • bearing levers 10 are pivotally mounted on pins 11, on which the intermediate roller 4 is mounted via bearings 12.
  • the bearings 12 can be adjusted via adjusting screws 13 in the bearing lever 10.
  • Couplings 14 engage on the bearings 12 of the intermediate roller 4 and are pivotally mounted on both sides of the bearings 15 of the first inking roller 6. The distance between the first inking roller 6 and the Adjust intermediate roller 4.
  • the coupling 14 thus cause the intermediate roller 4 with constant pressure on the first Ink application roller 6 is present, regardless of whether the intermediate roller 4 is switched off from the dampening roller 5 via the adjusting means 9.
  • the bearings 15 of the first inking rollers and the bearings 17 of the dampening roller 5 are designed such that both rollers can be set down from the outer surface of the plate cylinder.
  • the embodiment variant according to FIG. 4 differs from the embodiment according to FIG. 2 in that the coupling 14 is omitted and in its place a compression spring 18 is provided, which positions the bearing levers 10 and thus the intermediate roller 4 on the first inking roller 6.
  • the compression springs 18 are supported on support bodies 19 which are fastened to the pivot levers 8.
  • the position of the intermediate roller 4 is shown in dash-dotted lines in the position in which it is in contact both with the first inking roller 6 and with the dampening roller 5.
  • the extended position of the intermediate roller 4 shows a distance from the dampening roller 5, the compression spring 18 ensuring constant contact with the outer surface of the first inking roller 6.
  • Fig. 5 shows a modification in which in the pivot lever 8 'have guides 20 in which the bearings 12 of the intermediate roller 4 are slidably guided.
  • the guides 20 are arranged at an angle alpha to the first inking roller 6, so that the contact pressure of the intermediate roller 4 to the first inking roller 6 is greater than the contact pressure of the intermediate roller 4 to the dampening roller 5.
  • the pressure spring 21 associated with the actuating means 9 will press the intermediate roller 4 with its full force onto the first inking roller 6. Only the dead weight of the intermediate roller 4 still causes a low contact force to the dampening roller 5.
  • the intermediate roller 4 is driven by the first inking roller 6 and a differential speed which may be given by the dampening roller 5 cannot affect the intermediate roller 4, but instead leads to slippage between the two rollers. In this embodiment too, the intermediate roller 4 can largely prevent stenciling of the first inking roller 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

The offset printing press has the inking roller (6) and the wetting roller (5) in contact with the press roller (1). The friction roller (4) which contacts both rollers is on a special mounting which enables the friction roller to remain in contact with the inking roller while lifted off the wetting roller. This allows wetting independent to the inking. The intermediate roller is on a mounting pivoted to lift the friction roller out of contact with the wetting roller and a second support frame pivoted on the axis of the inking roller provides an adjustable support via a screw adjuster.

Description

Die Erfindung bezieht sich auf eine Offsetdruckmaschine mit einem Farb- und einem Feuchtwerk, die einem Plattenzylinder zugeordnet sind, mit mindestens einer Zwischenwalze, die durch Friktion angetriebene Farb- und Feuchtauftragwalzen verbindet, wobei die Zwischenwalze beiderseits gelagert und mittels Stellmitteln zu einer Farb- und/oder einer Feuchtauftragwalze verstellbar ist.The invention relates to an offset printing machine with an inking and a dampening unit, which are assigned to a plate cylinder, with at least one intermediate roller that connects ink-driven and dampening application rollers driven by friction, the intermediate roller being supported on both sides and by means of adjusting means to form an inking and / or or a dampening roller is adjustable.

Eine bekannte Ausführung dieser Art zeigt die DE 40 13 741 A1, bei der die Zwischenwalze über zwei Stellmittel gegenüber einer Farbauftragwalze bzw. einer Feuchtauftragwalze verstellbar ist. Mit dieser Lösung soll eine vielseitige ökonomische Betriebsführung und eine Verkürzung der Rüstzeiten erreicht werden.A known embodiment of this type is shown in DE 40 13 741 A1, in which the intermediate roller can be adjusted relative to an inking roller or a dampening roller using two adjusting means. This solution is intended to achieve versatile, economical management and a reduction in set-up times.

Lie Aufgabe vorliegender Erfindung ist es, bei einer getrennten Betriebsweise zwischen Farb- und Feuchtwerk, das Schablonieren auf der ersten Farbauftragwalze zu reduzieren, so daß auch schwierige Druckarbeiten durchgeführt werden können.The object of the present invention is to reduce the stenciling on the first inking roller in a separate mode of operation between the inking and dampening units, so that even difficult printing work can be carried out.

Gemäß der Erfindung wird die Aufgabe dadurch gelöst, daß die Zwischenwalze beiderseits auf Schwenkhebeln gelagert ist, derart, daß sie beim Verstellen mit der ersten Farbauftragwalze in Abrollkontakt bleibt und daß sie beim Abstellen von der Feuchtauftragwalze abgehoben ist. Wird bei dieser Lösung die Zwischenwalze von der Feuchtauftragwalze abgehoben, so daß das Feuchtwerk vom Farbwerk getrennt ist, bleibt die Zwischenwalze in Abrollkontakt mit der ersten Farbauftragwalze und kann hier den von der Platte zurückkehrenden Farbfilm auf der Farbauftragwalze vergleichmäßigen und somit ein Schablonieren weitgehend verhindern. In dieser Stellung kann das Feuchtwerk unabhängig vom Farbwerk die Druckplatte feuchten. Hierbei kann z. B. die Feuchtauftragwalze mit unterschiedlicher Geschwindigkeit zum Plattenzylinder angetrieben sein.According to the invention the object is achieved in that the intermediate roller is mounted on swivel levers on both sides, in such a way that it remains in rolling contact with the first inking roller when it is being adjusted and that it is lifted off the dampening roller when it is switched off. In this solution, if the intermediate roller is lifted off the dampening roller so that the dampening unit is separated from the inking unit, the intermediate roller remains in rolling contact with the first inking roller and can even out the ink film returning from the plate on the inking roller and thus largely prevent stenciling. In this position, the dampening system can work independently Wet the printing plate from the inking unit. Here, for. B. the dampening roller can be driven at different speeds to the plate cylinder.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß beiderseits an den Lagerungen der ersten Farbauftragwalze Schwenkhebel angeordnet sind, in denen die Zwischenwalze gelagert ist und daß den Schwenkhebeln Stellmittel zugeordnet sind. Bei dieser Ausgestaltung schwenkt somit die Zwischenwalze um die erste Farbauftragwalze, so daß sie beim Abstellen von der Feuchtauftragwalze immer im Kontakt mit der Farbauftragwalze bleibt.An advantageous embodiment of the invention is characterized in that pivot levers are arranged on both sides of the bearings of the first inking roller, in which the intermediate roller is mounted and that adjusting means are assigned to the pivot levers. In this embodiment, the intermediate roller thus pivots around the first inking roller, so that it always remains in contact with the inking roller when it is set down by the dampening roller.

Eine weitere vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß beiderseits an den Lagerungen der Feuchtauftragwalze Schwenkhebel gelagert sind, denen Stellmittel zugeordnet sind, daß an den Schwenkhebeln Lagerhebel schwenkbar befestigt sind, an denen die Zwischenwalze gelagert ist und daß an den Lagern der Zwischenwalze Koppeln angreifen, die beiderseits auf den Lagerungen der ersten Farbauftragwalze schwenkbar gelagert sind. Bei dieser abgewandelten Lagerung der Zwischenwalze gewährleisten die Koppeln die permanente Anlage der Zwischenwalze an der ersten Farbauftragwalze, so daß beim Abstellen derselben der Kontakt zur ersten Farbauftragwalze erhalten bleibt.A further advantageous embodiment of the invention is characterized in that pivot levers are mounted on both sides of the bearings of the dampening application roller, to which actuating means are assigned, that pivot levers are pivotally attached to the pivot levers, on which the intermediate roller is mounted and that couplings act on the bearings of the intermediate roller , which are pivotally mounted on both sides on the bearings of the first inking roller. In this modified storage of the intermediate roller, the couplings ensure the permanent contact of the intermediate roller with the first inking roller, so that contact with the first inking roller is maintained when the same is turned off.

Vorteilhaft ist es weiterhin, daß an den Koppeln Stellmittel vorgesehen sind, die an den Lagern der Zwischenwalze angreifen, um den Abstand zwischen Zwischenwalze und erster Farbauftragwalze einzustellen.It is also advantageous that adjusting means are provided on the coupling which engage the bearings of the intermediate roller in order to adjust the distance between the intermediate roller and the first inking roller.

Eine weitere Variante der Lagerung der Zwischenwalze ist dadurch gekennzeichnet, daß beiderseits an den Lagerungen der Feuchtauftragwalze Schwenkhebel gelagert sind, denen Stellmittel zugeordnet sind, daß an den Schwenkhebeln Lagerhebel Schwenkbar befestigt sind, an denen die Zwischenwalze gelagert ist und daß den Lagerhebeln Druckfedern zugeordnet sind, die die Zwischenwalze an die erste Farbauftragwalze anstellen, wobei die Druckfedern von Stützkörpern gehalten sind, die an den Schwenkhebeln befestigt sind. Durch die Druckfedern läßt sich eine spielfreie Anstellung der Zwischenwalze an die erste Farbauftragwalze gewährleisten, wobei der Druck der Druckfedern die Anstellkraft bestimmt. Auch beim Abstellen der Zwischenwalze, bei der sie von der ersten Feuchtauftragwalze abgehoben ist, wird die Anstellung an die erste Farbauftragwalze nicht beeinflußt.Another variant of the storage of the intermediate roller is characterized in that pivot levers are mounted on both sides of the bearings of the dampening roller, the Adjustment means are assigned that bearing levers are pivotally attached to the pivot levers, on which the intermediate roller is mounted, and that compression springs are assigned to the bearing levers, which position the intermediate roller against the first inking roller, the compression springs being held by support bodies which are attached to the pivot levers . A play-free adjustment of the intermediate roller to the first inking roller can be ensured by the compression springs, the pressure of the compression springs determining the contact force. Even when the intermediate roller is parked, when it is lifted off the first dampening roller, the adjustment to the first inking roller is not affected.

Eine weitere Ausführungsvariante der Erfindung ist dadurch gekennzeichnet, daß beiderseits an den Lagerungen der Feuchtauftragwalze Schwenkhebel gelagert sind, denen Stellmittel zugeordnet sind, daß an den Schwenkhebeln Führungen vorgesehen sind, in denen die Lager der Zwischenwalze gleitend geführt sind und daß die Führungen in einem Winkel Alpha zur ersten Farbauftragwalze angeordnet sind, so daß der Anstelldruck der Zwischenwalze an die erste Farbauftragwalze größer ist, als der Anstelldruck der Zwischenwalze an die Feuchtauftragwalze. Bei dieser Lösungsvariante wird auch in der angestellten Position die Zwischenwalze durch den höheren Anstelldruck von der ersten Farbauftragwalze angetrieben, unabhängig davon, mit welcher Geschwindigkeit die Feuchtauftragwalze angetrieben ist.Another embodiment of the invention is characterized in that pivot levers are mounted on both sides of the bearings of the dampening roller, to which actuating means are assigned that guides are provided on the pivot levers in which the bearings of the intermediate roller are slidably guided and that the guides are at an angle alpha are arranged to the first inking roller, so that the contact pressure of the intermediate roller on the first inking roller is greater than the contact pressure of the intermediate roller on the dampening roller. In this variant of the solution, the intermediate roller is also driven by the first inking roller in the adjusted position, regardless of the speed at which the dampening roller is driven.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt.Embodiments of the invention are shown schematically in the drawings.

Es zeigt:

Fig. 1
eine Seitenansicht eines Farbfeuchtwerks,
Fig. 2
eine Lagerung der Zwischenwalze,
Fig. 3
einen Teillängsschnitt durch die Lagerung der Zwischenwalze,
Fig. 4
eine abgewandelte Lagerung der Zwischenwalze,
Fig. 5
eine abgewandelte Lagerung der Zwischenwalze.
It shows:
Fig. 1
a side view of a dampening system,
Fig. 2
storage of the intermediate roller,
Fig. 3
a partial longitudinal section through the storage of the intermediate roller,
Fig. 4
a modified storage of the intermediate roller,
Fig. 5
a modified storage of the intermediate roller.

In Fig. 1 ist dem Plattenzylinder 1 ein Farbwerk 2 und ein Feuchtwerk 3 zugeordnet. Eine Zwischenwalze 4 verbindet die Feuchtauftragwalze 5 mit der ersten Farbauftragwalze 6. Im gezeigten Ausführungsbeispiel ist der Feuchtauftragwalze 5 eine mit Antrieb versehene Reibwalze 7 zugeordnet, die die Feuchtauftragwalze 5 antreibt und ein Schablonieren der Feuchtauftragwalze 5 verhindert. Die Zwischenwalze 4 kann beiderseits auf Schwenkhebeln gelagert sein, die wiederum auf den Lagerungen der ersten Farbauftragwalze 6 angeordnet sind, so daß die Zwischenwalze 4 beim Abstellen um die erste Farbauftragwalze schwenkt und mit dieser in Abrollkontakt bleibt. Hierbei wird die Zwischenwalze 4 von der Feuchtauftragwalze 5 abgehoben. Bei der in Fig. 2 wiedergegebenen Ausführung ist die Zwischenwalze 4 beiderseits über Schwenkhebel 8 an der Lagerung der Feuchtauftragwalze 5 gelagert. Dem Schwenkhebel 8 wiederum sind Stellmittel 9 zugeordnet, mit denen die Zwischenwalze 4 von der Feuchtauftragwalze 5 abgestellt werden kann. An den Schwenkhebeln 8 sind Lagerhebel 10 auf Zapfen 11 schwenkbar befestigt, an denen die Zwischenwalze 4 über Lager 12 gelagert ist. Die Lager 12 sind über Stellschrauben 13 in dem Lagerhebel 10 einstellbar. An den Lagern 12 der Zwischenwalze 4 greifen Koppeln 14 an, die beiderseits auf den Lagerungen 15 der ersten Farbauftragwalze 6 schwenkbar gelagert sind. Über Stellschrauben 16 läßt sich der Abstand zwischen der ersten Farbauftragwalze 6 und der Zwischenwalze 4 einstellen. Die Koppeln 14 bewirken somit, daß die Zwischenwalze 4 mit konstantem Druck an der ersten Farbauftragwalze 6 anliegt, unabhänglg davon, ob über die Stellmittel 9 die Zwischenwalze 4 von der Feuchtauftragwalze 5 abgestellt ist. Hierbei ist zu berücksichtigen, daß die Lagerungen 15 der ersten Farbauftragwalzen und die Lagerungen 17 der Feuchtauftragwalze 5 so ausgebildet sind, daß beide Walzen von der Mantelfläche des Plattenzylinders abgestellt werden können.1, an inking unit 2 and a dampening unit 3 are assigned to the plate cylinder 1. An intermediate roller 4 connects the dampening roller 5 to the first inking roller 6. In the exemplary embodiment shown, the dampening roller 5 is assigned a drive roller 7 which drives the dampening roller 5 and prevents the dampening roller 5 from being stenciled. The intermediate roller 4 can be mounted on both sides on pivot levers, which in turn are arranged on the bearings of the first inking roller 6, so that the intermediate roller 4 pivots when it is turned around the first inking roller and remains in rolling contact with the latter. Here, the intermediate roller 4 is lifted off the dampening roller 5. In the embodiment shown in FIG. 2, the intermediate roller 4 is supported on both sides via pivot levers 8 on the bearing of the dampening roller 5. The pivoting lever 8 in turn is assigned adjusting means 9 with which the intermediate roller 4 can be switched off by the dampening roller 5. On the pivot levers 8 bearing levers 10 are pivotally mounted on pins 11, on which the intermediate roller 4 is mounted via bearings 12. The bearings 12 can be adjusted via adjusting screws 13 in the bearing lever 10. Couplings 14 engage on the bearings 12 of the intermediate roller 4 and are pivotally mounted on both sides of the bearings 15 of the first inking roller 6. The distance between the first inking roller 6 and the Adjust intermediate roller 4. The coupling 14 thus cause the intermediate roller 4 with constant pressure on the first Ink application roller 6 is present, regardless of whether the intermediate roller 4 is switched off from the dampening roller 5 via the adjusting means 9. It should be taken into account here that the bearings 15 of the first inking rollers and the bearings 17 of the dampening roller 5 are designed such that both rollers can be set down from the outer surface of the plate cylinder.

Die Ausführungsvariante gemäß Fig. 4 unterscheidet sich von der Ausführung gemäß Fig. 2 dadurch, daß die Koppel 14 entfällt und an deren Stelle eine Druckfeder 18 vorgesehen ist, die die Lagerhebel 10 und somit die Zwischenwalze 4 an die erste Farbauftragwalze 6 anstellen. Die Druckfedern 18 stützten sich hierbei an Stützkörpern 19 ab, die an den Schwenkhebeln 8 befestigt sind. In dieser Figur ist strichpunktiert die Stellung der Zwischenwalze 4 in der angestellten Stellung gezeigt, bei der sie sowohl mit der ersten Farbauftragwalze 6 als auch mit der Feuchtauftragwalze 5 in Kontakt steht. Die ausgezogene Stellung der Zwischenwalze 4 zeigt einen Abstand zur Feuchtauftragwalze 5, wobei die Druckfeder 18 für eine konstante Anlage an der Mantelfläche der ersten Farbauftragwalze 6 sorgt.The embodiment variant according to FIG. 4 differs from the embodiment according to FIG. 2 in that the coupling 14 is omitted and in its place a compression spring 18 is provided, which positions the bearing levers 10 and thus the intermediate roller 4 on the first inking roller 6. The compression springs 18 are supported on support bodies 19 which are fastened to the pivot levers 8. In this figure, the position of the intermediate roller 4 is shown in dash-dotted lines in the position in which it is in contact both with the first inking roller 6 and with the dampening roller 5. The extended position of the intermediate roller 4 shows a distance from the dampening roller 5, the compression spring 18 ensuring constant contact with the outer surface of the first inking roller 6.

Fig. 5 zeigt eine Abwandlung, bei der im Schwenkhebel 8' Führungen 20 aufweisen, in denen die Lager 12 der Zwischenwalze 4 gleitend geführt sind. Die Führungen 20 sind in einem Winkel Alpha zur ersten Farbauftragwalze 6 angeordnet, so daß der Anstelldruck der Zwischenwalze 4 an die erste Farbauftragwalze 6 größer ist, als der Anstelldruck der Zwischenwalze 4 an die Feuchtauftragwalze 5. Beträgt der Winkel Alpha z. B. 90°, so wird die dem Stellmittel 9 zugeordnete Druckfeder 21 mit ihrer vollen Kraft die Zwischenwalze 4 an die erste Farbauftragwalze 6 andrücken. Lediglich das Eigengewicht der Zwischenwalze 4 bewirkt noch eine geringe Anstellkraft an die Feuchtauftragwalze 5. Bei dieser Ausgestaltung wird die Zwischenwalze 4 von der ersten Farbauftragwalze 6 angetrieben und eine eventuell bei der Feuchtauftragwalze 5 gegebene Differenzgeschwindigkeit kann sich nicht auf die Zwischenwalze 4 auswirken, sondern führt zu einem Schlupf zwischen beiden Walzen. Auch bei dieser Ausgestaltung kann die Zwischenwalze 4 ein Schablonieren der ersten Farbauftragwalze 6 weitgehend verhindern.Fig. 5 shows a modification in which in the pivot lever 8 'have guides 20 in which the bearings 12 of the intermediate roller 4 are slidably guided. The guides 20 are arranged at an angle alpha to the first inking roller 6, so that the contact pressure of the intermediate roller 4 to the first inking roller 6 is greater than the contact pressure of the intermediate roller 4 to the dampening roller 5. Is the angle alpha z. B. 90 °, the pressure spring 21 associated with the actuating means 9 will press the intermediate roller 4 with its full force onto the first inking roller 6. Only the dead weight of the intermediate roller 4 still causes a low contact force to the dampening roller 5. In this embodiment, the intermediate roller 4 is driven by the first inking roller 6 and a differential speed which may be given by the dampening roller 5 cannot affect the intermediate roller 4, but instead leads to slippage between the two rollers. In this embodiment too, the intermediate roller 4 can largely prevent stenciling of the first inking roller 6.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
PlattenzylinderPlate cylinder
22nd
FarbwerkInking unit
33rd
FeuchtwerkDampening system
44th
ZwischenwalzeIntermediate roller
55
FeuchtauftragwalzeDampening roller
66
FarbauftragwalzeInking roller
77
ReibwalzeGrater
88th
SchwenkhebelSwivel lever
99
StellmittelPositioning means
1010th
LagerhebelBearing lever
1111
ZapfenCones
1212th
Lagercamp
1313
StellschraubeSet screw
1414
KoppelPaddock
1515
Lagerungstorage
1616
StellschraubeSet screw
1717th
Lagerungstorage
1818th
DruckfederCompression spring
1919th
StützkörperSupport body
2020th
Führungenguides
2121
DruckfederCompression spring

Claims (6)

Offsetdruckmaschine mit einem Farb- und einem Feuchtwerk, die einem Plattenzylinder zugeordnet sind,mit mindestens einer Zwischenwalze, die durch Friktion angetriebene Farb- und Feuchtauftragwalze verbindet, wobei die Zwischenwalze beiderseits gelagert und mittels Stellmitteln zu einer Farb- und/oder einer Feuchtauftragwalze verstellbar ist,
dadurch gekennzeichnet, daß - die Zwischenwalze (4) beiderseits auf Schwenkhebeln (8) gelagert ist, derart, daß sie beim Verstellen mit der ersten Farbauftragwalze (6) in Abrollkontakt bleibt und - sie beim Abstellen von der Feuchtauftragwalze (5) abgehoben ist. Offset printing machine with an inking and dampening unit, which are assigned to a plate cylinder, with at least one intermediate roller, which connects the ink-driven and dampening application roller driven by friction, the intermediate roller being supported on both sides and adjustable by means of adjusting means to form an inking and / or dampening application roller,
characterized in that - The intermediate roller (4) is mounted on both sides on swivel levers (8) in such a way that it remains in rolling contact when being adjusted with the first inking roller (6) and - It is lifted off the dampening roller (5) when it is parked. Offsetdruckmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß - beiderseits an den Lagerungen (15) der ersten Farbauftragwalze (6) Schwenkhebel (8) angeordnet sind, in denen die Zwischenwalze (4) gelagert ist und - den Schwenkhebeln (8) Stellmittel (9) zugeordnet sind. Offset printing machine according to claim 1,
characterized in that - On both sides of the bearings (15) of the first inking roller (6) pivot levers (8) are arranged, in which the intermediate roller (4) is mounted and - The swivel levers (8) are assigned adjusting means (9). Offsetdruckmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß - beiderseits an den Lagerungen (17) der Feuchtauftragwalze (5) Schwenkhebel (8) gelagert sind, denen Stellmittel (9) zugeordnet sind, - an den Schwenkhebeln (8) Lagerhebel (10) schwenkbar befestigt sind, an denen die Zwischenwalze (4) gelagert ist und - an den Lagerhebeln (10) der Zwischenwalze (4) Koppeln (14) angreifen, die beiderseits auf den Lagerungen (15) der ersten Farbauftragwalze (6) schwenkbar gelagert sind. Offset printing machine according to claim 1,
characterized in that - On both sides on the bearings (17) of the dampening roller (5) pivot levers (8) are mounted, which actuators (9) are assigned, - On the pivot levers (8) bearing levers (10) are pivotally attached, on which the intermediate roller (4) is mounted and - On the bearing levers (10) of the intermediate roller (4) engage couplers (14) which are pivotally mounted on both sides on the bearings (15) of the first inking roller (6). Offsetdruckmaschine nach Anspruch 3,
dadurch gekennzeichnet,
daß an den Koppeln (14) Stellschrauben (16) vorgesehen sind, die an den Lagerhebeln (10) der Zwischenwalze (4) angreifen, um den Abstand zwischen Zwischenwalze (4) und erster Farbauftragwalze (6) einzustellen.Offset printing machine according to claim 3,
characterized by
that set screws (16) are provided on the couplers (14) which engage the bearing levers (10) of the intermediate roller (4) in order to adjust the distance between the intermediate roller (4) and the first inking roller (6). Offsetdruckmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß - beiderseits an den Lagerungen (17) der Feuchtauftragwalze (5) Schwenkhebel (8) gelagert sind, denen Stellmittel (9) zugeordnet sind, - an den Schwenkhebeln (8) Lagerhebel (10) schwenkbar befestigt sind an denen die Zwischenwalze (4) gelagert ist und - den Lagerhebeln (8) Druckfedern (18) zugeordnet sind, die die Zwischenwalze (4) an die erste Farbauftragwalze (6) anstellen, wobei die Druckfedern (18) von Stützkörpern (19) gehalten sind, die an den Schwenkhebeln (8) befestigt sind. Offset printing machine according to claim 1,
characterized in that - On both sides on the bearings (17) of the dampening roller (5) pivot levers (8) are mounted, which actuators (9) are assigned, - On the pivot levers (8) bearing levers (10) are pivotally attached to which the intermediate roller (4) is mounted and - The bearing levers (8) are assigned compression springs (18) which place the intermediate roller (4) on the first inking roller (6), the compression springs (18) being held by support bodies (19) which are fastened to the pivoting levers (8) are. Offsetdruckmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß - beiderseits an den Lagerungen (17) der Feuchtauftragwalze (5) Schwenkhebel (8') gelagert sind, denen Stellmittel (9) zugeordnet sind, - an den Schwenkhebeln (8') Führungen (20) vorgesehen sind, in denen die Lager (12) der Zwischenwalze (4) gleitend geführt sind und - die Führung (20) in einem Winkel Alpha zur ersten Farbauftragwalze (6) angeordnet sind, so daß der Anstelldruck der Zwischenwalze (4) an die erste Farbauftragwalze (6) größer ist, als der Anstelldruck der Zwischenwalze (4) an die Feuchtauftragwalze (5). Offset printing machine according to claim 1,
characterized in that - Both sides are mounted on the bearings (17) of the dampening roller (5), pivot levers (8 '), to which adjusting means (9) are assigned, - On the pivot levers (8 ') guides (20) are provided, in which the bearings (12) of the intermediate roller (4) are slidably guided and - The guide (20) are arranged at an angle alpha to the first inking roller (6), so that the contact pressure of the intermediate roller (4) on the first inking roller (6) is greater than the contact pressure of the intermediate roller (4) on the dampening roller ( 5).
EP96114865A 1995-11-07 1996-09-17 Offset printing machine Expired - Lifetime EP0774353B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19541418 1995-11-07
DE19541418A DE19541418A1 (en) 1995-11-07 1995-11-07 Offset printing machine

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EP0774353A1 true EP0774353A1 (en) 1997-05-21
EP0774353B1 EP0774353B1 (en) 1999-12-01

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EP96114865A Expired - Lifetime EP0774353B1 (en) 1995-11-07 1996-09-17 Offset printing machine

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US (1) US5823107A (en)
EP (1) EP0774353B1 (en)
JP (1) JP3930926B2 (en)
DE (2) DE19541418A1 (en)

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DE19911568A1 (en) * 1999-03-16 2000-09-21 Heidelberger Druckmasch Ag Process for dampening a planographic printing form and dampening unit of a planographic printing machine
US20030172818A1 (en) * 2002-03-13 2003-09-18 Marcel Motard Dampening system for a printing press
US6698877B2 (en) 2002-06-28 2004-03-02 Kimberly-Clark Worldwide, Inc. Offset printing apparatus for applying a substance
JP2007021858A (en) * 2005-07-15 2007-02-01 Komori Corp Printing machine equipped with moving type ink unit
CN110001187B (en) * 2019-04-25 2023-08-29 浙江炜冈科技股份有限公司 Inking mechanism of offset printing equipment and printer

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Also Published As

Publication number Publication date
JP3930926B2 (en) 2007-06-13
DE19541418A1 (en) 1997-05-15
DE59603776D1 (en) 2000-01-05
US5823107A (en) 1998-10-20
JPH09136397A (en) 1997-05-27
EP0774353B1 (en) 1999-12-01

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