EP0061535B1 - Inking device for printing machines - Google Patents

Inking device for printing machines Download PDF

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Publication number
EP0061535B1
EP0061535B1 EP81110524A EP81110524A EP0061535B1 EP 0061535 B1 EP0061535 B1 EP 0061535B1 EP 81110524 A EP81110524 A EP 81110524A EP 81110524 A EP81110524 A EP 81110524A EP 0061535 B1 EP0061535 B1 EP 0061535B1
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EP
European Patent Office
Prior art keywords
roller
transfer roller
inking unit
webs
ink
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
Application number
EP81110524A
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German (de)
French (fr)
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EP0061535A1 (en
Inventor
Rudi Junghans
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
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Heidelberger Druckmaschinen AG
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Priority to AT81110524T priority Critical patent/ATE11754T1/en
Publication of EP0061535A1 publication Critical patent/EP0061535A1/en
Application granted granted Critical
Publication of EP0061535B1 publication Critical patent/EP0061535B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/14—Applications of messenger or other moving transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers

Definitions

  • the invention relates to an inking unit for printing presses with an ink fountain roller rotating in the ink fountain, a transfer roller with a plurality of helically extending webs on the lateral surface and with a friction roller rotating at machine speed, on which the transfer roller rolls and transports the ink film into the inking mechanism.
  • a known embodiment of this type shows a transfer roller, on the outer surface of which there are provided a large number of narrow surface sections, the flanks of which merge helically into fillets. On the trailing side as seen in the direction of rotation, the surface sections merge into the fillets with sharp edges.
  • the high-speed transfer roller with the narrow surface sections takes up ink from the slower-running ink fountain roller and transfers it to the inking unit.
  • the disadvantage of this known embodiment is that only very narrow ink strips are transferred to the inking unit, which must then be distributed over the entire area by the rollers of the inking unit, for which purpose a large number of inking unit rollers are required.
  • Another major disadvantage of the known design is that the sharp trailing edges of the surface sections, for. B. when rolling between transfer roller and ink fountain roller uncontrolled color accumulates, which is completely randomly and uncontrollably given to the inking unit rollers after reaching an indefinite maximum, so that in this area there is an oversupply of color, which leads to color fluctuations on the printed product.
  • Another disadvantage of the known design is that the transfer roller is very difficult to wash, because it must be z. For example, every fillet can be washed out by hand when changing colors to remove all paint residues. It is also not possible to use the narrow surface sections to return too much ink present in the inking unit to the ink fountain.
  • the object of the invention is to provide a transfer roller in the inking unit for printing presses, which at high machine speeds transfers as flat a film of ink as possible into the inking unit or feeds ink back from the inking unit into the ink fountain and which enables the transfer of thinnest layers of ink from the ink fountain roller into the inking unit .
  • An advantage of the invention is that through the continuous contact system between the transfer roller and the friction roller there is an uninterrupted, continuous contact between the two rollers, so that the narrow strip of ink picked up by the webs is already rolled out into a wide strip of ink between these two rollers.
  • the uninterrupted contact surface also makes it easy to wash the transfer roller together with the inking unit, so that no ink residues can settle in the depressions provided between the webs. Due to the constant installation of the transfer roller on the ink fountain roller, it is still possible to return excess ink that is not required to be fed back from the inking unit into the ink fountain, so that splashing of the ink in the inking unit is avoided with certainty.
  • the drive of the transfer roller by means of spur gears arranged on both sides ensures a uniform ink transfer between the transfer roller and the friction roller, so that the braking effect of the ink fountain roller in the transfer roller cannot have a negative effect due to uncontrolled slip or stronger or weaker system on one side.
  • Another advantage of a transfer roller designed in this way is that, given the different peripheral speeds between the transfer roller and the ink fountain roller, due to the small width of the webs and the low contact pressure of the latter on the ink fountain roller, there is only minimal heating of the ink to be transferred to the inking unit, even at the highest Machine speed. On the other hand, the rest of the changes in shape are compensated or made ineffective by minimal heating due to the system pressure.
  • spur gears on both ends of the transfer roller according to claim 3 Due to the arrangement of spur gears on both ends of the transfer roller according to claim 3 and their drive via spur gears on the steering knuckles of the friction roller, a one-sided contact of the transfer roller by the gearing forces is excluded with certainty, so that evenly thin ink transfer is guaranteed over the length of the transfer roller . Fastening the spur gears via compression springs enables a uniform tooth engagement on both sides by simply pressing the transfer roller onto the friction roller.
  • the 1 has an ink fountain 1 with an ink metering device 2, in which an ink fountain roller 3 rotates.
  • a transfer roller 4 which is pivotally mounted about a friction roller 5, from which the ink film is transferred via inking rollers 6 to the plate cylinder, not shown.
  • the ink fountain roller 3 rotates at a relatively slow speed, while the rollers 4, 5 and 6 are driven at the peripheral speed of the plate cylinder, i. H. turn at full machine speed.
  • the ink fountain 1 and the subsequent rollers 3 to 6 are supported on both sides in machine side frames 7.
  • the friction roller 5 is rotatably supported on both sides with its stub axles 8, 9 via bearings 10, 11 in the machine side frames 7.
  • a drive spur gear 12 is fastened on the steering knuckle 8 outside the machine side frame.
  • 9.9 spur gears 13, 14 are mounted on the axle shaft 8, which are pressed by means of the screws 15 over the disks 16 and disc springs 17 via an intermediate ring 18 on the end faces of the friction roller 5, so that they drive the driving forces via frictional contact transferred to the transfer roller 4.
  • the transfer roller 4 in turn is pivotally mounted about the friction roller 5 via the levers 19, 20 such that the levers 19, 20 are mounted on the bearing holders 10, 11 via bushings 21.
  • the transfer roller 4 is mounted on needle bearings 22 on a non-rotating axis 23, which is guided on both sides in sliding bearings 24 in the levers 19, 20.
  • the pressure screws 25 take up a pressure spring in their interior, which press the pressure pin 26 outwards and thus press the transfer roller 4 against the friction roller 5 via the axis 23.
  • the pressure force can be adjusted in its strength via the pressure screws 25.
  • spur gears 27, 28 are attached to the transfer roller, which mesh with the spur gears 13, 14 on the friction roller.
  • the outer surface of the transfer roller 4 carries a coating 29 made of elastic material, for. B. Polyurethane 45 Shore. This coating 29 is provided on its outer surface with narrow webs 30 (Fig. 3, 4 and 5) which run helically. The webs are delimited on both sides by recesses 31 which merge into the webs with a small inclination 32 (FIG. 5).
  • a width of the webs 30 of approximately 2 mm was selected, the base of the recesses 31 being 0.2 mm deeper than the webs and the inclination 32 on both sides of the webs 30 being approximately 6 ° with a diameter of the transfer roller 4 of 85 mm and 12 bars on the circumference.
  • the web height is always less than 1 mm.
  • the number of ridges depends on the amount of the maximum color to be transferred or the maximum layer thickness of the color film conveyed by the doctor.
  • the contact force of the springs provided in the pressure screws 25 can be limited in the embodiment shown via stops, not shown, which are arranged on the levers 19, 20 in the direction of the friction roller 5 and z. B. enable precise adjustment of the positioning force via adjusting screws.
  • the transfer roller 4 can be pivoted via the levers 19, 20 from the ink fountain roller 3, for. B. to turn off the ink supply in the inking unit
  • the coating 29 on the transfer roller 4 advantageously consists of an elastic material with high wear resistance.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

In an inking unit for a printing press having an ink duct with an ink-duct roller revolvable at a given speed therein, a transfer roller in rolling contact with the ink-duct roller, the transfer roller having an outer cylindrical surface formed with a plurality of helical ridges thereon, and a distributor roller revolvable at press speed greater than the given speed of the ink-duct roller, the transfer roller being rollable on the distributor roller for transporting ink film from the ink-duct roller farther into the inking unit, the improvement there including mutually meshing gear means carried by the transfer roller and the distributor roller, the transfer roller being drivable by the distributor roller via the gear means, and means for applying contact pressure of such magnitude between the transfer roller and the distributor roller during rolling of the transfer roller on the distributor roller that there is continuous contact between the surface of the distributor roller and the surface of the transfer roller located between the ridges, the ridges being in relatively low-pressure contact with the ink-duct roller revolving more slowly than the distributor roller.

Description

Die Erfindung bezieht sich auf ein Farbwerk für Druckmaschinen mit einer im Farbkasten umlaufenden Farbkastenwalze, einer Übertragwalze mit mehreren schraubenlinienförmig verlaufenden Stegen auf der Mantelfläche und mit einer mit Maschinengeschwindigkeit umlaufenden Reibwalze, an der die Übertragwalze abrollt und den Farbfilm in das Farbwerk weitertransportiert.The invention relates to an inking unit for printing presses with an ink fountain roller rotating in the ink fountain, a transfer roller with a plurality of helically extending webs on the lateral surface and with a friction roller rotating at machine speed, on which the transfer roller rolls and transports the ink film into the inking mechanism.

Eine bekannte Ausführung dieser Art (DE-A-2 062 276) zeigt eine Übertragwalze, auf deren Mantelfläche eine Vielzahl schmaler Oberflächenabschnitte vorgesehen sind, deren Flanken schraubenlinienförmig in Hohlkehlen übergehen. Auf der in Drehrichtung gesehen nachlaufenden Seite gehen die Oberflächenabschnitte scharfkantig in die Hohlkehlen über. Die schnelllaufende Übertragwalze nimmt mit den schmalen Oberflächenabschnitten Farbe von der langsamer laufenden Farbkastenwalze auf und überträgt diese in das Farbwerk.A known embodiment of this type (DE-A-2 062 276) shows a transfer roller, on the outer surface of which there are provided a large number of narrow surface sections, the flanks of which merge helically into fillets. On the trailing side as seen in the direction of rotation, the surface sections merge into the fillets with sharp edges. The high-speed transfer roller with the narrow surface sections takes up ink from the slower-running ink fountain roller and transfers it to the inking unit.

Der Nachteil dieser bekannten Ausführung ist, daß nur sehr schmale Farbstreifen in das Farbwerk übertragen werden, die sodann durch die Walzen des Farbwerkes vollflächig verteilt werden müssen, wozu eine Vielzahl von Farbwerkswalzen erforderlich sind. Ein weiterer wesentlicher Nachteil der bekannten Ausführung ist, daß sich an den scharfen nachlaufenden Kanten der Oberflächenabschnitte, z. B. beim Abwälzen zwischen Übertragwalze und Farbkastenwalze unkontrolliert Farbe ansammelt, die nach Erreichen eines unbestimmten Maximums völlig wahllos und unkontrollierbar an die Farbwerkswalzen abgegeben wird, so daß in diesem Bereich ein Überangebot an Farbe entsteht, das zu Farbschwankungen auf dem Druckprodukt führt. Ein weiterer Nachteil der bekannten Ausführung ist, daß die Übertragwalze sehr schwer zu waschen ist, denn es muß z. B. beim Farbwechsel jede Hohlkehle von Hand ausgewaschen werden, um alle Farbreste zu beseitigen. Auch ist es nicht möglich, mit den schmalen Oberflächenabschnitten zuviel im Farbwerk vorhandene Farbe in den Farbkasten zurückzufördern.The disadvantage of this known embodiment is that only very narrow ink strips are transferred to the inking unit, which must then be distributed over the entire area by the rollers of the inking unit, for which purpose a large number of inking unit rollers are required. Another major disadvantage of the known design is that the sharp trailing edges of the surface sections, for. B. when rolling between transfer roller and ink fountain roller uncontrolled color accumulates, which is completely randomly and uncontrollably given to the inking unit rollers after reaching an indefinite maximum, so that in this area there is an oversupply of color, which leads to color fluctuations on the printed product. Another disadvantage of the known design is that the transfer roller is very difficult to wash, because it must be z. For example, every fillet can be washed out by hand when changing colors to remove all paint residues. It is also not possible to use the narrow surface sections to return too much ink present in the inking unit to the ink fountain.

Aufgabe der Erfindung ist es, eine Übertragwalze im Farbwerk für Druckmaschinen zu schaffen, die bei hohen Maschinengeschwindigkeiten einen möglichst flächigen Farbfilm in das Farbwerk überträgt bzw. Farbe aus dem Farbwerk in den Farbkasten zurückfördert und die die Übertragung dünnster Farbschichten von der Farbkastenwalze in das Farbwerk ermöglicht.The object of the invention is to provide a transfer roller in the inking unit for printing presses, which at high machine speeds transfers as flat a film of ink as possible into the inking unit or feeds ink back from the inking unit into the ink fountain and which enables the transfer of thinnest layers of ink from the ink fountain roller into the inking unit .

Die Aufgabe wird durch die im Kennzeichen des Anspruchs 1 aufgeführten erfinderischen Merkmale gelöst. Ein Vorteil der Erfindung besteht darin, daß durch die durchgehende Kontaktanlage zwischen Übertragwalze und Reibwalze eine ununterbrochene, durchgehende Berührung zwischen beiden Walzen erfolgt, so daß der von den Stegen aufgenommene schmale Farbstreifen bereits zwischen diesen beiden Walzen zu einem breiten Farbstreifen ausgewalzt wird. Auch läßt sich durch die ununterbrochene Anlagefläche die Übertragwalze auf einfache Weise gemeinsam mit dem Farbwerk waschen, so daß sich keine Farbreste in den zwischen den Stegen vorgesehenen Vertiefungen absetzen können. Durch die immerwährende Anlage der Übertragwalze an der Farbkastenwalze ist es weiterhin möglich, zuviel geförderte nicht benötigte Farbe aus dem Farbwerk in den Farbkasten zurückzufördern, so daß ein Spritzen der Farbe im Farbwerk mit Sicherheit vermieden wird.The object is achieved by the inventive features listed in the characterizing part of claim 1. An advantage of the invention is that through the continuous contact system between the transfer roller and the friction roller there is an uninterrupted, continuous contact between the two rollers, so that the narrow strip of ink picked up by the webs is already rolled out into a wide strip of ink between these two rollers. The uninterrupted contact surface also makes it easy to wash the transfer roller together with the inking unit, so that no ink residues can settle in the depressions provided between the webs. Due to the constant installation of the transfer roller on the ink fountain roller, it is still possible to return excess ink that is not required to be fed back from the inking unit into the ink fountain, so that splashing of the ink in the inking unit is avoided with certainty.

Der Antrieb der Übertragwalze mittels beidseitig angeordneten Stirnrädern gewährleistet einen gleichmäßigen Farbübertrag zwischen Übertragwalze und Reibwalze, so daß sich die Bremswirkung der Farbkastenwalze bei der Übertragwalze nicht durch einen unkontrollierten Schlupf bzw. einseitig stärkere oder schwächere Anlage negativ auswirken kann. Ein weiterer Vorteil einer derartig ausgebildeten Übertragwalze besteht darin, daß bei den unterschiedlichen Umfangsgeschwindigkeiten zwischen Übertragwalze und Farbkastenwalze durch die geringe Breite der Stege und durch den geringen Anlagedruck derselben an der Farbkastenwalze nur eine minimale Erwärmung der in das Farbwerk zu übertragenden Farbe erfolgt, selbst bei höchster Maschinengeschwindigkeit. Andererseits werden aber gerade durch den Anlagedruck die restlichen Formänderungen durch eine minimale Erwärmung kompensiert bzw. unwirksam gemacht.The drive of the transfer roller by means of spur gears arranged on both sides ensures a uniform ink transfer between the transfer roller and the friction roller, so that the braking effect of the ink fountain roller in the transfer roller cannot have a negative effect due to uncontrolled slip or stronger or weaker system on one side. Another advantage of a transfer roller designed in this way is that, given the different peripheral speeds between the transfer roller and the ink fountain roller, due to the small width of the webs and the low contact pressure of the latter on the ink fountain roller, there is only minimal heating of the ink to be transferred to the inking unit, even at the highest Machine speed. On the other hand, the rest of the changes in shape are compensated or made ineffective by minimal heating due to the system pressure.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen des Erfindungsgegenstandes gekennzeichnet, wobei das Merkmal von Anspruch 2 eine Ausgestaltung der Mantelfläche der Übertragwalze kennzeichnet, die es ermöglicht bei stärkerer, insgesamt aber bereits bei relativ schwacher Anpreßkraft zwischen Übertragwalze und Reibwalze, eine ununterbrochene, durchgehende Berührung zwischen beiden Walzen zu erreichen. Hierdurch kann die Walkreibung und damit die Wärmeentwicklung wesentlich reduziert werden und trotzdem ein ununterbrochener dünner Farbfilm in das Farbwerk übertragen werden.In the subclaims, advantageous refinements of the subject matter of the invention are characterized, the feature of claim 2 characterizing a configuration of the outer surface of the transfer roller, which enables an uninterrupted, continuous contact between the two rollers with a stronger, but overall already relatively weak contact pressure between the transfer roller and the friction roller to reach. As a result, the friction and thus the heat development can be significantly reduced and an uninterrupted thin color film can be transferred to the inking unit.

Durch die Anordnung von Stirnrädern auf beiden Stirnseiten der Übertragwalze gemäß Anspruch 3 und deren Antrieb über Stirnräder auf den Achsschenkeln der Reibwalze ist ein einseitiges Anliegen der Übertragwalze durch die Verzahnungskräfte mit Sicherheit ausgeschlossen, so daß auch über die Länge der Übertragwalze eine gleichmäßig dünne Farbübertragung gewährleistet ist. Die Befestigung der Stirnräder über Druckfedern ermöglicht bei der Montage der Übertragwalze einen gleichmäßigen Zahneingriff auf beiden Seiten durch einfaches Andrücken der Übertragwalze an die Reibwalze.Due to the arrangement of spur gears on both ends of the transfer roller according to claim 3 and their drive via spur gears on the steering knuckles of the friction roller, a one-sided contact of the transfer roller by the gearing forces is excluded with certainty, so that evenly thin ink transfer is guaranteed over the length of the transfer roller . Fastening the spur gears via compression springs enables a uniform tooth engagement on both sides by simply pressing the transfer roller onto the friction roller.

Die Merkmale der nachfolgenden Ansprüche haben sich bei umfangreichen Versuchsserien als vorteilhafte Ausgestaltung erwiesen, die auf einfache und kostengünstige Weise eine sichere und optimale Funktion und Farbübertragung des Farbwerks bei allen Maschinengeschwindigkeiten gewährleisten.The features of the following claims have proven to be an advantageous embodiment in the case of extensive test series which are based on simple and inexpensive way to ensure a safe and optimal function and ink transfer of the inking unit at all machine speeds.

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

  • Fig. 1 eine Seitenansicht eines Farbwerksausschnittes,
  • Fig. 2 ein Längsschnitt durch eine Reib- und Übertragwalze gemäß der Erfindung,
  • Fig. 3 eine Stirnansicht der Übertragwalze,
  • Fig. 4 eine Draufsicht auf die Übertragwalze und
  • Fig. 5 das Profil der Übertragwalze im Querschnitt in vergrößerter und überbetonter Darstellung.
An embodiment of the invention is shown schematically in the drawings. It shows
  • 1 is a side view of a section of the inking unit,
  • 2 shows a longitudinal section through a friction and transfer roller according to the invention,
  • 3 is an end view of the transfer roller,
  • Fig. 4 is a plan view of the transfer roller and
  • Fig. 5 shows the profile of the transfer roller in cross section in an enlarged and overemphasized representation.

Das Farbwerk gemäß Fig. 1 besitzt einen Farbkasten 1 mit einer Farbdosiereinrichtung 2, in dem eine Farbkastenwalze 3 umläuft. An der Farbkastenwalze 3 liegt eine Übertragwalze 4 an, die um eine Reibwalze 5 schwenkbar gelagert ist, von der aus der Farbfilm über Farbwerkswalzen 6 auf den nicht dargestellten Plattenzylinder übertragen wird. Bei dieser Ausführung dreht sich die Farbkastenwalze 3 mit relativ geringer Geschwindigkeit, während die Walzen 4, 5 und 6 mit der Umfangsgeschwindigkeit des Plattenzylinders angetrieben werden, d. h. sich mit voller Maschinengeschwindigkeit drehen. Der Farbkasten 1 und die nachfolgenden Walzen 3 bis 6 sind beiderseits in Maschinenseitengestellen 7 gelagert.1 has an ink fountain 1 with an ink metering device 2, in which an ink fountain roller 3 rotates. On the ink fountain roller 3 is a transfer roller 4, which is pivotally mounted about a friction roller 5, from which the ink film is transferred via inking rollers 6 to the plate cylinder, not shown. In this embodiment, the ink fountain roller 3 rotates at a relatively slow speed, while the rollers 4, 5 and 6 are driven at the peripheral speed of the plate cylinder, i. H. turn at full machine speed. The ink fountain 1 and the subsequent rollers 3 to 6 are supported on both sides in machine side frames 7.

Wie in Fig. 2 dargestellt, ist die Reibwalze 5 beiderseits mit ihren Achsschenkeln 8, 9 über Lager 10, 11 in den Maschinenseitengestellen 7 drehbar gelagert. Auf dem Achsschenkel 8 ist außerhalb des Maschinenseitengestells ein Antriebsstirnrad 12 befestigt. Beiderseits der Reibwalze 5 sind auf deren Achsschenket 8,9 9 Stirnräder 13,14 gelagert, die mittels den Schrauben 15 über die Scheiben 16 und Tellerfedern 17 über einen Zwischenring 18 an die Stirnseiten der Reibwalze 5 gepreßt werden, so daß sie über Reibkontakt die Antriebskräfte auf die Übertragwalze 4 übertragen.As shown in Fig. 2, the friction roller 5 is rotatably supported on both sides with its stub axles 8, 9 via bearings 10, 11 in the machine side frames 7. A drive spur gear 12 is fastened on the steering knuckle 8 outside the machine side frame. On both sides of the friction roller 5, 9.9 spur gears 13, 14 are mounted on the axle shaft 8, which are pressed by means of the screws 15 over the disks 16 and disc springs 17 via an intermediate ring 18 on the end faces of the friction roller 5, so that they drive the driving forces via frictional contact transferred to the transfer roller 4.

Die Übertragwalze 4 wiederum ist über die Hebel 19, 20 um die Reibwalze 5 schwenkbar gelagert, derart, daß die Hebel 19, 20 über Büchsen 21 auf den Lagerhaltern 10, 11 gelagert sind. Die Übertragwalze 4 ist über Nadellager 22 auf einer nicht drehenden Achse 23 gelagert, die beiderseits in Schiebelagern 24 in den Hebeln 19, 20 geführt ist. Die Druckschrauben 25 nehmen in ihrem Innern eine Druckfeder auf, die den Druckbolzen 26 nach außen drücken und somit die Übertragwalze 4 über die Achse 23 an die Reibwalze 5 anpressen. Über die Druckschrauben 25 läßt sich die Anpreßkraft in ihrer Stärke einstellen.The transfer roller 4 in turn is pivotally mounted about the friction roller 5 via the levers 19, 20 such that the levers 19, 20 are mounted on the bearing holders 10, 11 via bushings 21. The transfer roller 4 is mounted on needle bearings 22 on a non-rotating axis 23, which is guided on both sides in sliding bearings 24 in the levers 19, 20. The pressure screws 25 take up a pressure spring in their interior, which press the pressure pin 26 outwards and thus press the transfer roller 4 against the friction roller 5 via the axis 23. The pressure force can be adjusted in its strength via the pressure screws 25.

Beiderseits an den Stirnseiten sind an der Übertragwalze 4 Stirnräder 27, 28 befestigt, die mit den Stirnrädern 13, 14 an der Reibwalze in Eingriff stehen. Durch einfaches Anpressen der Übertragwalze 4 an die Reibwalze 5 stellen sich die Stirnräder 13, 14 durch ihren Reibkontakt automatisch spielfrei ein. Die Mantelfläche der Übertragwalze 4 trägt einen Überzug 29 aus elastischem Material, z. B. Polyurethan-45 Shore. Dieser Überzug 29 ist an seiner Mantelfläche mit schmalen Stegen 30 versehen (Fig. 3, 4 und 5), die schraubenlinienförmig verlaufen. Beiderseits werden die Stege von Ausnehmungen 31 begrenzt, die mit kleiner Neigung 32 in die Stege übergehen (Fig. 5). Im gezeigten Ausführungsbeispiel wurde eine Breite der Stege 30 von etwa 2 mm gewählt, wobei der Grund der Ausnehmungen 31 0,2 mm tiefer als die Stege liegt und die Neigung 32 beiderseits der Stege 30 etwa 6° beträgt bei einem Durchmesser der Übertragwalze 4 von 85 mm und 12 Stegen am Umfang. In der Regel ist die Steghöhe stets niedriger als 1 mm. Die Anzahl der Stege ist von der Menge der maximal zu übertragenden Farbe bzw. der maximalen Schichtdicke des vom Duktor geförderten Farbfilms abhängig.On both sides of the end faces 4 spur gears 27, 28 are attached to the transfer roller, which mesh with the spur gears 13, 14 on the friction roller. By simply pressing the transfer roller 4 against the friction roller 5, the spur gears 13, 14 are automatically set without play due to their frictional contact. The outer surface of the transfer roller 4 carries a coating 29 made of elastic material, for. B. Polyurethane 45 Shore. This coating 29 is provided on its outer surface with narrow webs 30 (Fig. 3, 4 and 5) which run helically. The webs are delimited on both sides by recesses 31 which merge into the webs with a small inclination 32 (FIG. 5). In the exemplary embodiment shown, a width of the webs 30 of approximately 2 mm was selected, the base of the recesses 31 being 0.2 mm deeper than the webs and the inclination 32 on both sides of the webs 30 being approximately 6 ° with a diameter of the transfer roller 4 of 85 mm and 12 bars on the circumference. As a rule, the web height is always less than 1 mm. The number of ridges depends on the amount of the maximum color to be transferred or the maximum layer thickness of the color film conveyed by the doctor.

Die Anstellkraft der in den Druckschrauben 25 vorgesehenen Federn läßt sich im gezeigten Ausführungsbeispiel über nicht dargestellte Anschläge begrenzen, die an den Hebeln 19, 20 in Richtung auf die Reibwalze 5 angeordnet sind und z. B. über Stellschrauben eine genaue Einstellung der Anstellkraft ermöglichen. Auch ist die Übertragwalze 4 über die Hebel 19, 20 von der Farbkastenwalze 3 abschwenkbar, z. B. zum Abstellen der Farbzufuhr in das Farbwerk Der Überzug 29 auf der Übertragwalze 4 besteht vorteilhafterweise aus einem elastischen Material mit hoher Verschleißfestigkeit.The contact force of the springs provided in the pressure screws 25 can be limited in the embodiment shown via stops, not shown, which are arranged on the levers 19, 20 in the direction of the friction roller 5 and z. B. enable precise adjustment of the positioning force via adjusting screws. Also, the transfer roller 4 can be pivoted via the levers 19, 20 from the ink fountain roller 3, for. B. to turn off the ink supply in the inking unit The coating 29 on the transfer roller 4 advantageously consists of an elastic material with high wear resistance.

Mit einem so ausgebildeten Farbwerk läßt sich eine konstante Farbübertragung erreichen mit einer guten Farbrückförderung, mit möglichst geringer Erwärmung der in das Farbwerk zu übertragenden Farbe und mit einer leichten Justierbarkeit der Übertragwalze, wobei eine Übertragung dünnster Farbschichten vom Duktor gewährleistet ist, so daß eine genaue Einstellung der in das Farbwerk zu übertragenden Farbmenge und eine Farbvoreinstellung auf einfache Weise durchgeführt werden kann.With an inking unit designed in this way, constant ink transfer can be achieved with good ink return, with the least possible heating of the ink to be transferred to the inking unit and with easy adjustment of the transfer roller, whereby transfer of the thinnest layers of ink from the ductor is ensured, so that an exact setting is ensured the amount of ink to be transferred to the inking unit and a color presetting can be carried out in a simple manner.

Claims (8)

1. Inking unit for printing machines provided with a duct roller rotating within the inkwell, a transfer roller, the shell surface of which is covered with a coat (29) of elastic material, whereby the said coat comprises on its shell surface several helically arranged webs, a friction roller rotating in sincronism with the machine speed, the transfer roller riding on the said friction roller carrying the ink film on to the inking unit, wherein the transfer roller (4) rides on the friction roller (5) under pressure contact in such a way as to ensure a continuous contact configuration also between the webs (30), while the transfer roller (4) is impellable by the friction roller (5) via the spur gears (13, 14, 27, 28) and the webs (30) always rest under slight pressure on the duct roller (3) rotating slowlier.
2. Inking unit according to claim 1, wherein the webs (30) are of small width and are limited by the recesses (31) bilaterally arranged with slight inclination (32) while their basic surface lies on a level which is only slightly inferior to the level of the shell surface of the coat (29).
3. Inking unit according to claims 1 and 2, wherein the transfer roller (4) comprises on both front sides spur gears (27, 28) which are in engagement with spur gears (13, 14) on the steering knuckles (8, 9) of the friction roller (5) while the spur gears (13, 14) of the friction roller (5) owing to the spring pressure imposed to it is in frictional contact with the friction roller (5).
4. Inking unit according to claims 1 to 3, wherein the transfer roller (4) is set under spring pressure to the duct roller (3), whereby the adjusting force can be limited by stops.
5. Inking unit according to claims 1 to 4, wherein the transfer roller (4) is supported by the duct roller (3) from which it can be swung off.
6. Inking unit according to claims 1 to 5, wherein the coat (29) is made of elastic material featuring an important resistance to wear.
7. Inking unit according to claims 1 to 6, wherein the basic surface of the recesses (31) is located less then 1 mm below the webs (30), while the elastic material (29) has a hardness of 35-55 Shore.
8. Inking unit according to claims 1 to 7, wherein the webs (30) on the coat (29) are 2 mm wide, the basic surface of the recesses (31) being arranged on a level which is 0,2 mm below the level of the webs (30), the inclination (32) of the recesses (31) being 6° on both sides of the webs, at a diameter of 85 mm and with 12 webs arranged on the circumference of the transfer roller (4).
EP81110524A 1981-03-13 1981-12-17 Inking device for printing machines Expired EP0061535B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110524T ATE11754T1 (en) 1981-03-13 1981-12-17 INKING UNIT FOR PRINTING PRESSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813109584 DE3109584A1 (en) 1981-03-13 1981-03-13 "FABWERK FOR PRINTING MACHINES"
DE3109584 1981-03-13

Publications (2)

Publication Number Publication Date
EP0061535A1 EP0061535A1 (en) 1982-10-06
EP0061535B1 true EP0061535B1 (en) 1985-02-13

Family

ID=6127096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110524A Expired EP0061535B1 (en) 1981-03-13 1981-12-17 Inking device for printing machines

Country Status (5)

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US (1) US4449451A (en)
EP (1) EP0061535B1 (en)
JP (1) JPS57157759A (en)
AT (1) ATE11754T1 (en)
DE (1) DE3109584A1 (en)

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DE3720053C2 (en) * 1987-06-16 1994-01-13 Heidelberger Druckmasch Ag Inking unit for rotary printing presses
DE3739893A1 (en) * 1987-11-25 1989-06-08 Heidelberger Druckmasch Ag INK FOR ROTATIONAL PRINTING MACHINES
US5632203A (en) * 1995-06-14 1997-05-27 Quad Graphics, Inc. Anti-ghosting roller
CA2744011C (en) 2007-12-21 2017-09-12 Apex Europe B.V. A method for printing a substrate using an anilox roll, an anilox roll for a printing method and a printing apparatus
JPWO2014162994A1 (en) * 2013-04-04 2017-02-16 株式会社小森コーポレーション Ink calling roller and manufacturing method thereof

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Also Published As

Publication number Publication date
ATE11754T1 (en) 1985-02-15
DE3109584A1 (en) 1982-09-30
US4449451A (en) 1984-05-22
EP0061535A1 (en) 1982-10-06
JPS57157759A (en) 1982-09-29

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