EP0389740B1 - Damping device - Google Patents

Damping device Download PDF

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Publication number
EP0389740B1
EP0389740B1 EP90100489A EP90100489A EP0389740B1 EP 0389740 B1 EP0389740 B1 EP 0389740B1 EP 90100489 A EP90100489 A EP 90100489A EP 90100489 A EP90100489 A EP 90100489A EP 0389740 B1 EP0389740 B1 EP 0389740B1
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EP
European Patent Office
Prior art keywords
roller
damping unit
damping
constructed
unit according
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
EP90100489A
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German (de)
French (fr)
Other versions
EP0389740A2 (en
EP0389740A3 (en
Inventor
Roland Höll
Herbert Rebel
Peter Hummel
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Filing date
Publication date
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Priority to AT90100489T priority Critical patent/ATE91965T1/en
Publication of EP0389740A2 publication Critical patent/EP0389740A2/en
Publication of EP0389740A3 publication Critical patent/EP0389740A3/en
Application granted granted Critical
Publication of EP0389740B1 publication Critical patent/EP0389740B1/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
    • B41F7/36—Inking-rollers serving also to apply ink repellants
    • 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
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the invention relates to a dampening system of an offset printing machine according to the preamble of the first claim.
  • a dampening unit of the type specified above is known from DE-OS 2 909 765.
  • This dampening unit has a dampening solution feed roller which forms both a metering gap for the application roller of the dampening unit and a preceding metering gap for a further dampening unit roller.
  • Special measures against stenciling are not provided, so that with such dampening systems there is a risk that a stenciling effect on the applicator roller may occur as a result of plate cylinder channel reactions, particularly in the case of difficult printing forms.
  • the object of the invention is to provide a dampening system in which the dampening solution supply roller has an axial rubbing point on the applicator roller for eliminating dampening agent interference screens, without at the same time forming a second rubbing point with an upstream dampening unit roller which has a metering gap with the dampening solution supply roller.
  • the advantage of the invention is that only in the one metering gap 1b of the dampening solution supply roller to the applicator roller for eliminating jamming patterns, axial rubbing and metering of dampening solution are coupled to one another, while in the upstream metering gap 1a of the dampening solution supply roller to the upstream dampening unit roller Dampening solution can be dosed unaffected by axial rubbing, which leads to an improvement in the printing result.
  • the dampening unit shown in FIG. 1 has an applicator roller 2, which rests on a plate cylinder 1 with its elastic surface. Oleophilic intermediate rollers 5, 6 establish a connection to inking rollers 7, 8 of an inking unit.
  • the ink cylinder 8 is supplied with ink via rollers (not shown) which are known per se from an ink supply and is passed on to application rollers 7 connected in series on the plate cylinder 1.
  • a further dampening unit roller 27 designed as a water tank roller is partially immersed in a water tank which absorbs dampening liquid. It has an elastic surface, for example made of rubber.
  • dampening agent supply roller 28 which is designed as a transfer roller and has a metallic, water-accepting surface.
  • the dampening unit shown in FIG. 2 in contrast to the type of dampening unit shown in FIG. 1, has a further dampening unit roller 4 designed as a metering roller and a dampening unit feed roller 3 configured as a water box roller, which is positioned directly on the application roller 2 in the operating position, the thickness of the dampening film being determined by the further dampening unit roller 4, which is arranged as a metering roller and is arranged on the dampening agent supply roller 3 in the circumferential direction before the line of contact with the applicator roller 2, can be determined.
  • a metering gap 1b for application roller 2 and a metering gap 1a upstream of this are provided.
  • the crossmember 17 has a pin-like extension 25 on both sides, which is guided axially movably in a ball sleeve 13 in the machine side walls 15. Furthermore, one of the axes 22, 24 has a metering gap 1a forming dampening solution supply rollers 3 or 28 and 4 or 27 on both sides on a pin-like extension 23 which is also axially movable in a ball sleeve 13 in the machine side walls 15.
  • an axial movement of the support frame 14, 17, 22 is initiated via a friction lever 20 and a driving roller 21 which runs in a link 19 of the extension 23.
  • the drive of the friction lever 20 can be achieved, for example, by means of a drive rod 16 which can be driven in a manner known per se from the machine drive or, if appropriate, also from a traversing drive of the inking unit.
  • the axes 22, 24 are rotatably but axially immovably mounted in the associated carrier 14.
  • the fixation in the axial direction takes place e.g. via locking rings that secure the outer and inner rings of the roller bearings 26 on the axles 22, 24.
  • the axle 24 is mounted at both ends in an eccentric bearing 10, which is arranged in the carrier 14.
  • the further dampening unit roller 4 which is designed as a metering roller, can, like the further dampening unit roller 27, designed as a water tank roller, be designed in a manner known per se.
  • basic suggestions are provided in DE-PS 2 054 678, with the axis 24 not having to be supported on one side in the carrier 14, but in a special lever which is pivoted relative to the carrier 14 by an adjusting device such that the axes 22, 24 are inclined to each other. This is not shown in the drawing.
  • the axis 22 of the dampening agent supply roller 3 and 28 is opposite to the drive mechanism 16, 19, 20, 21 for the axial back and forth movement by means of an electric motor 9, which is independent of the machine and can be regulated separately in speed, via a gear 18, 29 in the circumferential direction drivable.
  • the gear 18 on the axis 22 must be provided with straight teeth, since this gear 18 carries out the back and forth movement of the support frame 14, 17, 22.
  • separation points can be provided in the axis 22 or the cross member 17 in a known manner.
  • the metering gap 1 a can be both adjusted and turned on and off by means of the rotatable eccentric bushings 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

In a damping device for an offset printing machine with a damping liquid feed roller, which forms an adjustable dosing gap in each case with an application roller resting on a plate cylinder and an upstream further damping device roller, in order that axial distribution takes place only in the dosing gap (1b) of the damping liquid feed roller to the application roller, supports (14) receiving the damping liquid feed roller (3; 28) and the upstream further damping device roller (4; 27) are fixedly connected by a cross-beam (17) parallel to the axle (22) of the damping liquid feed roller (3; 28) to form a support frame (14, 17, 22), on which a drive mechanism (16, 19, 20, 21) causing an axial reciprocating movement engages. <IMAGE>

Description

Die Erfindung betrifft ein Feuchtwerk einer Offsetdruckmaschine nach dem Oberbegriff des ersten Patentanspruches.The invention relates to a dampening system of an offset printing machine according to the preamble of the first claim.

Ein Feuchtwerk vorstehend spezifizierter Gattung ist aus der DE-OS 2 909 765 bekannt. Dieses Feuchtwerk weist eine Feuchtmittelzuführwalze auf, die sowohl einen Dosierspalt zur Auftragwalze des Feuchtwerkes als auch einen vorangehenden Dosierspalt zu einer weiteren Feuchtwerkswalze bildet. Besondere Maßnahmen gegen Schablonieren sind nicht vorgesehen, so daß bei derartigen Feuchtwerken die Gefahr besteht, daß ein Schabloniereffekt auf der Auftragwalze infolge Plattenzylinder-Kanalrückwirkungen, insbesondere bei schwierigen Druckformen auftreten kann.A dampening unit of the type specified above is known from DE-OS 2 909 765. This dampening unit has a dampening solution feed roller which forms both a metering gap for the application roller of the dampening unit and a preceding metering gap for a further dampening unit roller. Special measures against stenciling are not provided, so that with such dampening systems there is a risk that a stenciling effect on the applicator roller may occur as a result of plate cylinder channel reactions, particularly in the case of difficult printing forms.

Aufgabe der Erfindung ist es, ein Feuchtwerk zu schaffen, bei dem die Feuchtmittelzuführwalze zur Beseitigung von Feuchtmittelstörschablonen eine axiale Verreibstelle an der Auftragwalze besitzt, ohne zugleich eine zweite Verreibstelle mit einer vorgeordneten Feuchtwerkswalze zu bilden, die mit der Feuchtmittelzuführwalze einen Dosierspalt aufweist.The object of the invention is to provide a dampening system in which the dampening solution supply roller has an axial rubbing point on the applicator roller for eliminating dampening agent interference screens, without at the same time forming a second rubbing point with an upstream dampening unit roller which has a metering gap with the dampening solution supply roller.

Gelöst wird die Aufgabe durch die im Kennzeichen des ersten Patentanspruches angegebenen Merkmale. Weitere Merkmale ergeben sich aus den Unteransprüchen.The object is achieved by the features specified in the characterizing part of the first claim. Further features emerge from the subclaims.

Der Vorteil der Erfindung besteht darin, daß nur in dem einen Dosierspalt 1b der Feuchtmittelzuführwalze zur Auftragwalze zur Störschablonenbeseitigung axiale Verreibung und eine Dosierung von Feuchtmittel miteinander gekoppelt sind, während in dem vorgelagerten Dosierspalt 1a der Feuchtmittelzuführwalze zur vorgeordneten Feuchtwerkswalze das Feuchtmittel unbeeinflußt von axialer Verreibung dosiert werden kann, was zu einer Verbesserung des Druckergebnisses führt.The advantage of the invention is that only in the one metering gap 1b of the dampening solution supply roller to the applicator roller for eliminating jamming patterns, axial rubbing and metering of dampening solution are coupled to one another, while in the upstream metering gap 1a of the dampening solution supply roller to the upstream dampening unit roller Dampening solution can be dosed unaffected by axial rubbing, which leads to an improvement in the printing result.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel in zwei Ausführungsformen von zwei bekannten Feuchtwerkstypen anhand einer Zeichnung beschrieben.The invention is described below using an exemplary embodiment in two embodiments of two known dampening unit types with reference to a drawing.

Auf dieser Zeichnung zeigt:

Fig. 1
eine schematische Seitenansicht einer ersten Ausführungsform des erfindungsgemäßen Feuchtwerkes,
Fig. 2
eine schematische Seitenansicht einer zweiten Ausführungsform des erfindungsgemäßen Feuchtwerkes,
Fig. 3
eine Draufsicht in aufgeklappter Darstellung auf zwei Feuchtwerkwalzen der Feuchtwerke nach Fig. 1 bzw. Fig. 2, die zur gemeinsamen Ausführung einer seitlichen Changierbewegung erfindungsgemäß in einem Stützrahmen gelagert sind.
This drawing shows:
Fig. 1
2 shows a schematic side view of a first embodiment of the dampening unit according to the invention,
Fig. 2
2 shows a schematic side view of a second embodiment of the dampening unit according to the invention,
Fig. 3
a plan view in an unfolded view of two dampening unit rollers of the dampening units according to FIG. 1 or FIG. 2, which are mounted according to the invention in a support frame for the execution of a lateral oscillating movement.

Das in Fig. 1 dargestellte Feuchtwerk weist eine Auftragwalze 2 auf, die mit ihrer elastischen Oberfläche an einem Plattenzylinder 1 anliegt. Oleophile Zwischenwalzen 5, 6 stellen eine Verbindung zu Farbwerkswalzen 7, 8 eines Farbwerkes her. Dem Farbzylinder 8 wird dabei Farbe über nicht dargestellte an sich bekannte Walzen von einer Farbzuführung zugeführt und an am Plattenzylinder 1 hintereinander geschaltete Auftragwalzen 7 weitergeleitet.The dampening unit shown in FIG. 1 has an applicator roller 2, which rests on a plate cylinder 1 with its elastic surface. Oleophilic intermediate rollers 5, 6 establish a connection to inking rollers 7, 8 of an inking unit. The ink cylinder 8 is supplied with ink via rollers (not shown) which are known per se from an ink supply and is passed on to application rollers 7 connected in series on the plate cylinder 1.

Eine als Wasserkastenwalze ausgebildete weitere Feuchtwerkswalze 27 taucht teilweise in einen Feuchtflüssigkeit aufnehmenden Wasserkasten ein. Sie besitzt eine elastische Oberfläche, z.B. aus Gummi.A further dampening unit roller 27 designed as a water tank roller is partially immersed in a water tank which absorbs dampening liquid. It has an elastic surface, for example made of rubber.

An der weiteren Feuchtwerkswalze 27 liegt eine als Übertragungswalze ausgebildete Feuchtmittelzuführwalze 28 an, die eine metallische, wasserannehmende Oberfläche aufweist.On the further dampening unit roller 27, there is a dampening agent supply roller 28 which is designed as a transfer roller and has a metallic, water-accepting surface.

Das in Fig. 2 dargestellte Feuchtwerk weist im Unterschied zu dem in Fig. 1 dargestellten Feuchtwerkstyp eine als Dosierwalze ausgebildete weitere Feuchtwerkswalze 4 und eine als Wasserkastenwalze ausgebildete, an die Auftragwalze 2 in der Betriebsstellung unmittelbar angestellte Feuchtmittelzuführwalze 3 auf, wobei die Dicke des Feuchtmittelfilms durch die an der Feuchtmittelzuführwalze 3 in der Umfangsrichtung vor der Berührungslinie mit der Auftragwalze 2 angeordnete als Dosierwalze ausgebildete weitere Feuchtwerkswalze 4 bestimmbar ist.The dampening unit shown in FIG. 2, in contrast to the type of dampening unit shown in FIG. 1, has a further dampening unit roller 4 designed as a metering roller and a dampening unit feed roller 3 configured as a water box roller, which is positioned directly on the application roller 2 in the operating position, the thickness of the dampening film being determined by the further dampening unit roller 4, which is arranged as a metering roller and is arranged on the dampening agent supply roller 3 in the circumferential direction before the line of contact with the applicator roller 2, can be determined.

In den beiden Feuchtwerkstypen nach Fig. 1 und nach Fig. 2 sind jeweils ein Dosierspalt 1b zur Auftragwalze 2 und ein diesem vorgelagerter Dosierspalt 1a vorhanden.In the two dampening unit types according to FIG. 1 and according to FIG. 2, a metering gap 1b for application roller 2 and a metering gap 1a upstream of this are provided.

Um zu verhindern, daß durch Schaffen einer axialen Verreibstelle zwischen der Feuchtmittelzuführwalze 3 bzw. 28 und der Auftragwalze 2 am Dosierspalt 1b zugleich eine weitere axiale Verreibstelle zwischen der Feuchtmittelzuführwalze 3 bzw. 28 und der vorgeordneten weiteren Feuchtwerkswalze 4 bzw. 27 an dem Dosierspalt 1a entsteht - was zu einer Beeinträchtigung der Vordosierung infolge durch Geschwindigkeitsänderung der axialen Verreibebewegung führen könnte - sind die den Dosierspalt 1a bildenden Feuchtwerkswalzen 3, 4 bzw. 27, 28 beidseitig in einem Träger 14 zwischen den Maschinenseitenwänden 15 angeordnet, wobei die Träger 14 durch eine zur Achse 22 der beiden Achsen 22, 24 der Feuchtwerkswalzen 3, 4 bzw. 27, 28 parallele Traverse 17 zu einem Stützrahmen 14, 17, 22 fest verbunden sind.In order to prevent that by creating an axial rub between the dampening solution feed roller 3 or 28 and the applicator roller 2 at the metering gap 1b, a further axial rub between the dampening solution feed roller 3 or 28 and the upstream further dampening roller 4 or 27 at the metering gap 1a is created - Which could impair the pre-metering as a result of a change in the speed of the axial displacement movement - the dampening unit rollers 3, 4 and 27, 28 forming the metering gap 1a are arranged on both sides in a carrier 14 between the machine side walls 15, the carriers 14 being arranged through an axis 22 of the two axes 22, 24 of the dampening unit rollers 3, 4 and 27, 28 parallel crossmember 17 are firmly connected to a support frame 14, 17, 22.

Die Traverse 17 weist beiderseits eine zapfenartige Verlängerung 25 auf, die in den Maschinenseitenwänden 15 axial beweglich in einer Kugelhülse 13 geführt ist. Ferner weist eine der Achsen 22, 24 der einen Dosierspalt 1a bildenden Feuchtmittelzuführwalzen 3 bzw. 28 und 4 bzw. 27 beidseitig eine zapfenartige Verlängerung 23 auf, die ebenfalls in den Maschinenseitenwänden 15 axial beweglich in einer Kugelhülse 13 geführt ist. An der zapfenartigen Verlängerung 23 der Achse 22 wird über Verreibungshebel 20 und eine Mitnehmerrolle 21, die in einer Kulisse 19 der Verlängerung 23 läuft, eine axiale Bewegung des Stützrahmens 14, 17, 22 eingeleitet. Der Antrieb des Verreibungshebels 20 ist z.B. mittels einer Antriebsstange 16 erzielbar, die in an sich bekannter Weise vom Maschinenantrieb oder gegebenenfalls auch von einem Changierantrieb des Farbwerkes abgeleitet antreibbar ist.The crossmember 17 has a pin-like extension 25 on both sides, which is guided axially movably in a ball sleeve 13 in the machine side walls 15. Furthermore, one of the axes 22, 24 has a metering gap 1a forming dampening solution supply rollers 3 or 28 and 4 or 27 on both sides on a pin-like extension 23 which is also axially movable in a ball sleeve 13 in the machine side walls 15. At the pin-like extension 23 of the axis 22, an axial movement of the support frame 14, 17, 22 is initiated via a friction lever 20 and a driving roller 21 which runs in a link 19 of the extension 23. The drive of the friction lever 20 can be achieved, for example, by means of a drive rod 16 which can be driven in a manner known per se from the machine drive or, if appropriate, also from a traversing drive of the inking unit.

Die Achsen 22, 24 sind im zugeordneten Träger 14 drehbar aber axial unbeweglich gelagert. Die Fixierung in axialer Richtung erfolgt z.B. über Sicherungsringe, die die Außen- bzw. Innenringe der Wälzlager 26 auf den Achsen 22, 24 sichern.The axes 22, 24 are rotatably but axially immovably mounted in the associated carrier 14. The fixation in the axial direction takes place e.g. via locking rings that secure the outer and inner rings of the roller bearings 26 on the axles 22, 24.

Um die Walzen 3, 4 bzw. 27, 28 zueinander hinsichtlich der Dosierung einstellen zu können, ist die Achse 24 an beiden Enden in je einem Exzenterlager 10 gelagert, das im Träger 14 angeordnet ist.In order to be able to adjust the rollers 3, 4 or 27, 28 to one another with regard to the metering, the axle 24 is mounted at both ends in an eccentric bearing 10, which is arranged in the carrier 14.

Die als Dosierwalze ausgebildete weitere Feuchtwerkswalze 4 kann ebenso wie die als Wasserkastenwalze ausgebildete weitere Feuchtwerkswalze 27 in an sich bekannter Weise schränkbar ausgebildet werden. Hierzu liefert beispielsweise prinzipielle Anregungen die DE-PS 2 054 678, wobei die Achse 24 hierzu an einer Seite nicht im Träger 14, sondern in einem besonderen Hebel gelagert werden müßte, der durch eine Stelleinrichtung gegenüber dem Träger 14 so verschwenkt wird, daß die Achsen 22, 24 zueinander eine Schräglage einnehmen. In der Zeichnung ist dies nicht dargestellt.The further dampening unit roller 4, which is designed as a metering roller, can, like the further dampening unit roller 27, designed as a water tank roller, be designed in a manner known per se. For this purpose, for example, basic suggestions are provided in DE-PS 2 054 678, with the axis 24 not having to be supported on one side in the carrier 14, but in a special lever which is pivoted relative to the carrier 14 by an adjusting device such that the axes 22, 24 are inclined to each other. This is not shown in the drawing.

Die Achse 22 der Feuchtmittelzuführwalze 3 bzw. 28 ist dem Antriebsmechanismus 16, 19, 20, 21 für die axiale Hin- und Herbewegung gegenüberliegend durch einen von der Maschine unabhängigen separat in der Drehzahl regelbaren Elektromotor 9 über ein Getriebe 18, 29 in Umfangsrichtung antreibbar. Das Zahnrad 18 auf der Achse 22 muß mit einer Geradverzahnung versehen sein, da dieses Zahnrad 18 die Hin- und Herbewegung des Stützrahmens 14, 17, 22 mit ausführt.The axis 22 of the dampening agent supply roller 3 and 28 is opposite to the drive mechanism 16, 19, 20, 21 for the axial back and forth movement by means of an electric motor 9, which is independent of the machine and can be regulated separately in speed, via a gear 18, 29 in the circumferential direction drivable. The gear 18 on the axis 22 must be provided with straight teeth, since this gear 18 carries out the back and forth movement of the support frame 14, 17, 22.

Es besteht auch die Möglichkeit, die den Dosierspalt 1a bildenden Feuchtwerkswalzen 3, 4 bzw. 27, 28 mittels eines Getriebezuges über Zahnräder 11, 12 synchron anzutreiben. Werden die Übersetzungsverhältnisse geändert, wäre auch ein asynchroner Antrieb mit Umfangsschlupf an den Walzenoberflächen denkbar.There is also the possibility of synchronously driving the dampening unit rollers 3, 4 or 27, 28 forming the metering gap 1a by means of a gear train via gearwheels 11, 12. If the gear ratios are changed, an asynchronous drive with circumferential slip on the roller surfaces would also be conceivable.

Für eine erleichterte Montage des Stützrahmens 14, 17, 22 in den Maschinenseitenwänden 15 können in bekannter Weise Trennstellen in der Achse 22 bzw. der Traverse 17 vorgesehen werden.In order to facilitate the assembly of the support frame 14, 17, 22 in the machine side walls 15, separation points can be provided in the axis 22 or the cross member 17 in a known manner.

Der Dosierspalt 1a läßt sich mittels der verdrehbaren Exzenterbuchsen 10 sowohl einstellen, als auch an- und abstellen.The metering gap 1 a can be both adjusted and turned on and off by means of the rotatable eccentric bushings 10.

Zur Einstellung des Anlagedruckes der Auftragwalze 2 am Plattenzylinder 1 und an der darunterliegenden Feuchtmittelzufuhrwalze 3 bzw. 28 (Dosierspalt 1b) sowie zum An- und Abstellen der Auftragwalze 2 dienen an sich bekannte, nicht dargestellte Mittel, z.B. eine Lagerung der Auftragwalze 2 in Exzenterlagern oder in Schwenkhebeln, die jeweils am Maschinenseitenständer 15 angebracht werden müßten.For adjusting the contact pressure of the application roller 2 on the plate cylinder 1 and on the dampening solution supply roller 3 or 28 (metering gap 1b) underneath and for turning the application roller 2 on and off, known means, not shown, are used, e.g. a storage of the applicator roller 2 in eccentric bearings or in swivel levers, which would have to be attached to the machine side stand 15.

Durch die Verwendungsmöglichkeit des Stützrahmens 14, 17, 22, welcher eine axiale Hin- und Herbewegung mit den beiden aufgenommenen Feuchtwerkswalzen 3, 4 bzw. 27, 28 ausführt, in zwei Ausführungsformen gemäß Fig. 1 und 2 von Feuchtwerkstypen wird deutlich, daß die Erfindung nicht darauf beschränkt werden kann, sondern bei beliebigen einen ersten und einen zweiten nachfolgenden Dosierspalt bildenden zwei Walzen einsetzbar ist, die mit einer axialen Verreibstelle versehen werden sollen, ohne den zwischen den beiden Walzen bestehenden Dosierspalt zu beeinflussen.The possibility of using the support frame 14, 17, 22, which carries out an axial back and forth movement with the two dampening unit rollers 3, 4 and 27, 28, in two embodiments according to FIGS. 1 and 2 of dampening unit types, clearly shows that the invention cannot be limited to this, but can be used with any two rollers forming a first and a second subsequent metering gap, which are to be provided with an axial rubbing point, without influencing the metering gap existing between the two rollers.

BezugszeichenlisteReference symbol list

11
PlattenzylinderPlate cylinder
22nd
AuftragwalzeApplicator roller
33rd
FeuchtmittelzuführwalzeFountain solution feed roller
44th
weitere Feuchtwerkswalzefurther dampening roller
55
ZwischenwalzeIntermediate roller
66
ZwischenwalzeIntermediate roller
77
FarbauftragwalzeInking roller
88th
FarbreibzylinderInk rubbing cylinder
99
Antriebdrive
1010th
ExzenterbuchseEccentric bushing
1111
Zahnradgear
1212
Zahnradgear
1313
KugelhülseBall sleeve
1414
Trägercarrier
1515
MaschinenseitenwändeMachine side panels
1616
AntriebsstangeDrive rod
1717th
Traversetraverse
1818th
Zahnradgear
1919th
KulisseBackdrop
2020th
VerreibungshebelFriction lever
2121
MitnehmerrolleCarrier roll
2222
Achseaxis
2323
zapfenartige Verlängerungcone-like extension
2424th
Achseaxis
2525th
zapfenartige Verlängerungcone-like extension
2626
Wälzlagerroller bearing
2727
weitere Feuchtwerkswalzefurther dampening roller
2828
FeuchtmittelzuführwalzeFountain solution feed roller
2929
Zahnradgear

Claims (8)

  1. Damping unit for an offset printing press with a damping agent feed roller which forms with an applicator roller lying against a plate cylinder and a previously arranged further ink fountain roller in each case an adjustable metering slot, whereby the axles of the rollers arranged on both sides in a carrier, can be driven by means of a drive train, characterised in that the carrier (14) of the damping agent feed rollers (3, 28) and the further damping agent roller (4, 27) is firmly connected by means of a cross member (17) parallel to the axle (22) of the damping agent feed roller (3, 28) to a support frame (14, 17, 22), that the cross member (17) has on both sides a pin-like prolongation (25), which is guided axially movably in the machine side walls (15) in a bearing shell (13), that at least one of the axes (22, 24) of the damping agent feed roller (3, 28) and of the further damping unit roller (4, 27) has on both sides a pin-like prolongation (23) which is likewise axially movably guided in a bearing shell (13) in the machine side walls (15) and that on one of the two finger-like prolongations (23, 25) there engages a drive mechanism (16, 19, 20, 21) effecting an axial to and fro movement.
  2. Damping unit according to Claim 1, characterised in that the axles (22, 24) in the respective carrier (14) are mounted rotatably but axially immovably.
  3. Damping unit according to Claim 1 and 2, characterised in that the axle (24) of the further damping unit roller (4, 27) is mounted at both ends in each case in an eccentric bearing (10) which is arranged in the carrier (14).
  4. Damping unit according to Claims 1 to 3, characterised in that a two roller damping unit (2, 3) is provided with an additional further damping unit roller (4) constructed as a metering roller and a damping agent feed roller (3) constructed as a water fountain roller.
  5. Damping unit according to Claims 1 to 3, characterised in that a three roller damping unit (2, 27, 28) is provided with a further damping unit roller (27) constructed as a water fountain roller and a damping agent feed roller (28) constructed as a transfer roller.
  6. Damping unit according to Claims 1 to 4, characterised in that the further damping unit roller (4) constructed as a metering roller is containable in fashion known per se.
  7. Damping unit according to Claims 1 to 3 and 5, characterised in that the further damping unit roller constructed as a water fountain roller is containable in fashion known per se.
  8. Damping unit according to Claims 1 to 7, characterised in that the axle (22) on the side lying opposite the drive mechanism for the axial to and fro movement is drivable by means of an electric motor (9) separately controllable in its rotational speed independent of the machine via a gear (19, 20).
EP90100489A 1989-03-25 1990-01-11 Damping device Expired - Lifetime EP0389740B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100489T ATE91965T1 (en) 1989-03-25 1990-01-11 DAMPENING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909985 1989-03-25
DE3909985A DE3909985C1 (en) 1989-03-25 1989-03-25

Publications (3)

Publication Number Publication Date
EP0389740A2 EP0389740A2 (en) 1990-10-03
EP0389740A3 EP0389740A3 (en) 1991-05-02
EP0389740B1 true EP0389740B1 (en) 1993-07-28

Family

ID=6377292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100489A Expired - Lifetime EP0389740B1 (en) 1989-03-25 1990-01-11 Damping device

Country Status (4)

Country Link
EP (1) EP0389740B1 (en)
AT (1) ATE91965T1 (en)
DE (2) DE3909985C1 (en)
ES (1) ES2044240T3 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE368091C (en) * 1923-02-01 Bautzner Ind Akt Ges Dampening system for rotary rubber printing machines
GB871786A (en) * 1957-01-18 1961-06-28 Maschf Augsburg Nuernberg Ag Damping apparatus for rotary printing presses
DE2054678C3 (en) * 1970-11-06 1975-05-22 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Dampening unit for lithographic printing machines
DE2909765A1 (en) * 1979-03-13 1980-09-18 Maschf Augsburg Nuernberg Ag MOISTURIZING
JPS59212268A (en) * 1983-05-11 1984-12-01 ボ−ルドウイン・テクノロジイ・コ−ポレイシヨン Humidifier and method in lithographic press
DE3623590A1 (en) * 1986-07-12 1988-02-04 Miller Johannisberg Druckmasch FILM DAMPING UNIT FOR OFFSET PRINTING MACHINES

Also Published As

Publication number Publication date
DE59002059D1 (en) 1993-09-02
ATE91965T1 (en) 1993-08-15
EP0389740A2 (en) 1990-10-03
EP0389740A3 (en) 1991-05-02
ES2044240T3 (en) 1994-01-01
DE3909985C1 (en) 1990-04-26

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