EP0943433B1 - Printing unit for a printing machine, particularly rotary offset printing machine - Google Patents

Printing unit for a printing machine, particularly rotary offset printing machine Download PDF

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Publication number
EP0943433B1
EP0943433B1 EP98810217A EP98810217A EP0943433B1 EP 0943433 B1 EP0943433 B1 EP 0943433B1 EP 98810217 A EP98810217 A EP 98810217A EP 98810217 A EP98810217 A EP 98810217A EP 0943433 B1 EP0943433 B1 EP 0943433B1
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EP
European Patent Office
Prior art keywords
cylinder
blanket cylinder
rubber
blanket
printing unit
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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
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EP98810217A
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German (de)
French (fr)
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EP0943433A1 (en
Inventor
Georg Götting
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Grapha Holding AG
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Grapha Holding AG
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Publication date
Application filed by Grapha Holding AG filed Critical Grapha Holding AG
Priority to DE59804990T priority Critical patent/DE59804990D1/en
Priority to EP98810217A priority patent/EP0943433B1/en
Priority to JP11067152A priority patent/JP2000033686A/en
Priority to US09/268,689 priority patent/US6314881B1/en
Publication of EP0943433A1 publication Critical patent/EP0943433A1/en
Application granted granted Critical
Publication of EP0943433B1 publication Critical patent/EP0943433B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders
    • B41F13/21—Bearer rings

Definitions

  • the invention relates to a printing unit for a printing press, in particular an offset rotary machine, with at least a plate cylinder or a first plate cylinder, a rubber cylinder or a first rubber cylinder and an impression cylinder or another rubber cylinder and one another plate cylinder, the rubber cylinder or the first rubber cylinder on his has a conical bearer ring on both ends, the one under pressure on a conical bearer ring End faces of the impression cylinder or the other rubber cylinder expires.
  • a printing unit of this type has become known from EP-A-0 531 880.
  • the elements involved in the printing process such as gears, bearings and cylinders, must be manufactured and assembled with very high precision, since otherwise printing defects in the form of stripes, dot widening or duplication phenomena occur.
  • Such a lack of pressure is also the so-called channel strip, which appears more and more with increasing machine speed.
  • both end faces of the plate and blanket cylinders To mount bearers. These are hardened and cylindrical ground steel rings that press against each other expire. They stiffen the printing unit by play and Largely cancel out the elasticity of the cylinder bearings, because roll the cylinders on the bearer rings under pre-tension. The bearers prevent that in the cylinder channels, where the compressive stress breaks down briefly without bearer rings, the cylinders reduce their distance and then the Slightly separate print insert again.
  • the use of the bearer rings mentioned has the disadvantage that that the distances between the interacting cylinders are not are adjustable.
  • the printing tension i.e. the distance between the rubber and the impression cylinder be adjustable to adapt to different Allow paper thicknesses or paper surfaces.
  • the elevator strength on the rubber cylinder be changed, which in turn changes the compressive stress changed between rubber and plate cylinder.
  • the compressive stress should be constant. So that should also Lift strength of the plate can be changed. This in turn changed the print length, which is not permitted in many cases is.
  • the mentioned printing units only Bearings between plate and blanket cylinders used.
  • the bearer rings on the plate and blanket cylinders make the Channel blow between these two cylinders largely eliminated, but not the channel blow between the rubber cylinder and Impression cylinder or a second rubber cylinder.
  • US-A-3,732,813 mediates a printing unit of an offset printing machine with a plate cylinder, a rubber cylinder and an impression cylinder.
  • Rubber cylinder and impression cylinder have conical bearer rings on the end faces, which run in pairs on each other and opposite cone angles exhibit.
  • EP-A-0 295 449 discloses an apparatus for machining, especially for printing or punching a web of material between two counter-rotating drivable work rolls, with the ends arranged in pairs rolling on top of each other conical bearer rings, the bearer ring pairs between Plate cylinder and blanket cylinder of a printing unit one form the same conical rolling line.
  • the invention has for its object a printing unit to create the type mentioned without sacrificing the benefits of the bearer rings infinitely adjustable center distances for rubber and impression cylinder or for rubber-rubber cylinders in rubber-rubber printing units.
  • the object is achieved in a generic printing unit in that for changing the distance between the impression cylinder or the further rubber cylinder and rubber cylinder or the first rubber cylinder, the cones of the bearer rings on the rubber cylinder or the first rubber cylinder have the same direction and the same cone angle and the cones of Bearings of the impression cylinder or further blanket cylinder have the opposite direction and the same cone angle as the bearer rings of the blanket cylinder or the first blanket cylinder.
  • the center distance between the rubber and the impression cylinder or between the two gum cylinders can be adjusted continuously, for example, by moving the impression cylinder in its axial direction by means of a spindle. The axis distance between the plate and the rubber cylinder does not change.
  • the printing unit 30 shown in FIG. 1 has a conventional one Plate cylinder 1 on the side plates 4 and 5 is stored.
  • the storage not shown here is here trained as usual.
  • the plate cylinder 1 is cylindrical Bearings 6 and 7 provided on cylindrical Unroll bearer rings 8 and 9 of a rubber cylinder.
  • To attach the pressure plates not shown here the plate cylinder 1 is a known clamping device 19 on.
  • the plates are attached to this at bent edges.
  • the rubber cylinder 2 also has a clamping device 20 with which the rubber blanket, not shown here is spanned. On the two jigs 19 and 20 there is a gap between the clamping edges for example 8 mm, which is the case with printing units according to the prior art Technology can cause the above-mentioned channel blow.
  • the rubber cylinder 2 has additional on both sides conical bearer rings 10 and 11 on conical Unroll bearer rings 12 and 13 of an impression cylinder 3.
  • cones 26 and 27 of the bearer rings 10 and 11 on the blanket cylinder 2 in the same direction and same cone angle.
  • Cones 28 and 29 of the bearer rings 12 and 13 have the opposite direction and the same cone angle like the cones 26 and 27 of the bearer rings 10 and 11.
  • the shaft ends 22 of the rubber cylinder are by springs 41 loaded and thereby roll the bearer rings 8, 9 of the blanket cylinder 2 on the bearer rings 6, 7 of the plate cylinder 1 under pressure.
  • the bearer rings 10, 11 of the blanket cylinder 2 on the bearer rings 12, 13 of the impression cylinder Third
  • a spindle 14 is arranged, with which the impression cylinder 3 is displaceable in its axial direction is. With such a shift, the center distance changes A between rubber 2 and impression cylinder 3, while the center distance B between the plate 1 and the rubber cylinder 2 remains unchanged.
  • a further spindle 15 is also attached to the side plate 4, with which the plate cylinder 1 axially displaceable is, for example, the print image on the substrate adjust laterally. Change at such a shift however, the center distances A and B of cylinders 1, 2 and 3 Not.
  • FIG. 3 shows a printing unit 40 according to the invention, at which a plate cylinder 31 conical bearer rings 35 and 37 which also on conical bearer rings 36 and 38 roll of a rubber cylinder 32.
  • the bearer rings of the rubber cylinder 32 in turn roll on bearer rings 12 and 13 of the impression cylinder 33.
  • the provided at the printing unit 30 cylindrical bearer rings 8 and 9 are in this embodiment not mandatory.
  • the impression cylinder 33 can also be changed here by means of a spindle 14 Center distance between the cylinders 32 and 33 in the axial direction be moved.
  • a spindle 34 which on a fixed frame part 39 is supported here three cylinders 31, 32, and 33 axially by the same amount can be moved to adjust the print image laterally. The center distances are not changed here.
  • the cylinders 1 to 3 or 31 to 33 with gears 16, 17 and 18 driven In the printing unit 30 as well as in the printing unit 40, the cylinders 1 to 3 or 31 to 33 with gears 16, 17 and 18 driven.
  • the gears 17 and 18, which the of the center distance adjustable cylinders 2 and 3 or 32 and 33 drive must be set for the smallest center distance so as not to jam. If the center distance is increased, so you get a backlash that is undesirable, because it creates printing problems. This play of teeth can by per se known and not shown idler gears To get picked up.
  • the tooth play mentioned can, however, be skilful Make the selection of the bearer ring diameter ineffective.
  • the Rolling diameter of the bearer rings on the driving cylinder for example, the cylinder 3 or 33 smaller than that Rolling diameter of the bearer rings on the driven cylinder,
  • the driven one Cylinder according to the ratio of the above Turn the rolling diameter more slowly than the driving cylinder.
  • the cylinders are forced at the same speed to run.
  • a relative movement occurs in the circumferential direction. Since these bearer rings 2 and 3 or 32 and 33 rolling under pressure on each other arises between them a frictional force that makes an existing backlash ineffective and eliminates the need for complex idler gears.
  • the printing unit according to the invention can also have four working cylinders in the order: plate, rubber, rubber and plate cylinders exhibit.
  • the two are Rubber cylinders on their faces with conical bearer rings provided and can be steplessly spaced axially from each other can be set.
  • the printing unit 30 would then be the Impression cylinder 3 by another blanket cylinder and replaced another plate cylinder.
  • This other rubber cylinder and the rubber cylinder 2 would then each be conical Bearings provided and can be spaced apart can be adjusted continuously.

Description

Die Erfindung betrifft ein Druckwerk für eine Druckmaschine, insbesondere eine Offset-Rotationsmaschine, mit wenigstens einem Plattenzylinder bzw. einem ersten Plattenzylinder, einem Gummizylinder bzw. einem ersten Gummizylinder und einem Gegendruckzylinder bzw. einem weiteren Gummizylinder und einem weiteren Plattenzylinder, wobei der Gummizylinder bzw. der erste Gummizylinder an seinen beiden Stirnseiten jeweils einen konischen Schmitzring aufweist, der unter Druck auf einem konischen Schmitzring an den Stirnseiten des Gegendruckzylinders bzw. des weiteren Gummizylinders abläuft.The invention relates to a printing unit for a printing press, in particular an offset rotary machine, with at least a plate cylinder or a first plate cylinder, a rubber cylinder or a first rubber cylinder and an impression cylinder or another rubber cylinder and one another plate cylinder, the rubber cylinder or the first rubber cylinder on his has a conical bearer ring on both ends, the one under pressure on a conical bearer ring End faces of the impression cylinder or the other rubber cylinder expires.

Ein Druckwerk dieser Art ist aus der EP-A-0 531 880 bekannt geworden. Bei solchen Druckwerken müssen die am Druckprozess beteiligten Elemente, wie beispielsweise Zahnräder, Lager und Zylinder mit sehr hoher Präzision gefertigt und montiert werden, da ansonst Druckmängel in Form von Streifen, Punktverbreiterungen oder Dubliererscheinungen auftreten.
Ein solcher Druckmangel ist auch der sogenannte Kanalstreifen, der mit zunehmender Maschinengeschwindigkeit immer stärker in Erscheinung tritt. A printing unit of this type has become known from EP-A-0 531 880. In such printing units, the elements involved in the printing process, such as gears, bearings and cylinders, must be manufactured and assembled with very high precision, since otherwise printing defects in the form of stripes, dot widening or duplication phenomena occur.
Such a lack of pressure is also the so-called channel strip, which appears more and more with increasing machine speed.

Um solche Mängel zu vermeiden, ist es weiter bekannt, auf beiden Stirnseiten des Platten- und Gummizylinders sogenannte Schmitzringe anzubringen. Diese sind gehärtete und zylindrisch geschliffene Stahlringe, die unter Druck aufeinander ablaufen. Sie versteifen das Druckwerk, indem sie Spiel und Elastizität der Zylinderlagerungen weitgehend aufheben, da die Zylinder auf den Schmitzringen unter Vorspannung abrollen. Die Schmitzringe verhindern, dass in den Zylinderkanälen, wo die Druckspannung ohne Schmitzringe kurzzeitig zusammenbricht, die Zylinder ihren Abstand verringern und beim anschliessenden Druckeinsatz wieder geringfügig auseinandergehen.To avoid such shortcomings, it is further known to so-called both end faces of the plate and blanket cylinders To mount bearers. These are hardened and cylindrical ground steel rings that press against each other expire. They stiffen the printing unit by play and Largely cancel out the elasticity of the cylinder bearings, because roll the cylinders on the bearer rings under pre-tension. The bearers prevent that in the cylinder channels, where the compressive stress breaks down briefly without bearer rings, the cylinders reduce their distance and then the Slightly separate print insert again.

Der Einsatz der genannten Schmitzringe hat jedoch den Nachteil, dass die Abstände der zusammenwirkenden Zylinder nicht einstellbar sind. Beim Drucken sollte jedoch die Druckspannung, d.h. der Abstand zwischen dem Gummi- und dem Gegendruckzylinder einstellbar sein, um eine Anpassung an unterschiedliche Papierdicken oder Papieroberflächen zu ermöglichen. Bei zylindrischen Schmitzringen müsste für eine solche Abstandsanpassung die Aufzugsstärke auf dem Gummizylinder verändert werden, wodurch sich wiederum die Druckspannung zwischen Gummi- und Plattenzylinder verändert. Hier sollte die Druckspannung aber konstant sein. Somit müsste auch die Aufzugsstärke der Platte geändert werden. Diese wiederum verändert die Drucklänge, was in vielen Fällen nicht zulässig ist.However, the use of the bearer rings mentioned has the disadvantage that that the distances between the interacting cylinders are not are adjustable. When printing, however, the printing tension, i.e. the distance between the rubber and the impression cylinder be adjustable to adapt to different Allow paper thicknesses or paper surfaces. In the case of cylindrical bearer rings, such Distance adjustment the elevator strength on the rubber cylinder be changed, which in turn changes the compressive stress changed between rubber and plate cylinder. Here should the compressive stress should be constant. So that should also Lift strength of the plate can be changed. This in turn changed the print length, which is not permitted in many cases is.

Aufgrund dieser Probleme werden bei erwähnten Druckwerken nur Schmitzringe zwischen Platten- und Gummizylinder verwendet. Durch die Schmitzringe an Platten- und Gummizylinder wird der Kanalschlag zwischen diesen beiden Zylindern weitgehend behoben, nicht aber der Kanalschlag zwischen Gummizylinder und Gegendruckzylinder oder einem zweiten Gummizylinder. Because of these problems, the mentioned printing units only Bearings between plate and blanket cylinders used. The bearer rings on the plate and blanket cylinders make the Channel blow between these two cylinders largely eliminated, but not the channel blow between the rubber cylinder and Impression cylinder or a second rubber cylinder.

Der Kanalschlag zwischen Gummi- und Gegendruckzylinder bzw. zweitem Gummizylinder wird in der EP - A - 0 531 880 über spezielle Anschläge und Zylinderanordnungen bekämpft.
Es ist auch bekannt, dass zur Vermeidung des Kanalschlages Gummitücher in Hülsenform verwendet werden. Das Wechseln dieser Hülsen ist jedoch sehr aufwendig, da beispielsweise auf einer Seite die Seitenwand und/oder die jeweilige Zylinderlagerung entfernt werden muss, um diese Hülsen zu wechseln.The channel blow between the rubber and impression cylinder or the second rubber cylinder is combated in EP-A-0 531 880 by means of special stops and cylinder arrangements.
It is also known that rubber blankets in the form of sleeves are used to avoid channel runout. However, changing these sleeves is very complex since, for example, the side wall and / or the respective cylinder bearing must be removed on one side in order to change these sleeves.

Die US - A - 3'732'813 vermittelt ein Druckwerk einer Offsetdruckmaschine mit einem Plattenzylinder, einem Gummizylinder und einem Gegendruckzylinder. Gummizylinder und Gegendruckzylinder weisen an den Stirnseiten konische Schmitzringe auf, die paarweise aufeinander ablaufen und entgegengerichtete Kegelwinkel aufweisen.US-A-3,732,813 mediates a printing unit of an offset printing machine with a plate cylinder, a rubber cylinder and an impression cylinder. Rubber cylinder and impression cylinder have conical bearer rings on the end faces, which run in pairs on each other and opposite cone angles exhibit.

Die EP - A - 0 295 449 offenbart eine Vorrichtung zum Bearbeiten, insbesondere zum Bedrucken oder Stanzen einer Materialbahn zwischen zwei gegenläufige antreibbaren Arbeitswalzen, mit an den Enden angeordneten paarweise aufeinander abrollenden konischen Schmitzringen, wobei die Schmitzringpaare zwischen Plattenzylinder und Gummizylinder eines Druckwerkes eine gleichgerichtete konische Abrolllinie bilden.EP-A-0 295 449 discloses an apparatus for machining, especially for printing or punching a web of material between two counter-rotating drivable work rolls, with the ends arranged in pairs rolling on top of each other conical bearer rings, the bearer ring pairs between Plate cylinder and blanket cylinder of a printing unit one form the same conical rolling line.

Der Erfindung liegt die Aufgabe zugrunde, ein Druckwerk der genannten Art zu schaffen, das ohne Verzicht auf die Vorteile der Schmitzringe stufenlos einstellbare Achsabstände für Gummi- und Gegendruckzylinder bzw. für Gummi-Gummizylinder bei Gummi-Gummi-Druckwerken ermöglicht.The invention has for its object a printing unit to create the type mentioned without sacrificing the benefits of the bearer rings infinitely adjustable center distances for rubber and impression cylinder or for rubber-rubber cylinders in rubber-rubber printing units.

Die Aufgabe ist bei einem gattungsgemässen Druckwerk dadurch gelöst, dass zur Abstandsänderung zwischen Gegendruckzylinder bzw. dem weiteren Gummizylinder und Gummizylinder bzw. dem ersten Gummizylinder die Konen der Schmitzringe auf dem Gummizylinder bzw. dem ersten Gummizylinder die gleiche Richtung und den gleichen Kegelwinkel und die Konen der Schmitzringe des Gegendruckzylinders bzw. des weiteren Gummizylinders die entgegengesetzte Richtung und den gleichen Kegelwinkel wie die Schmitzringe des Gummizylinders bzw. des ersten Gummizylinders aufweisen.
Beim erfindungsgemässen Druckwerk lässt sich der Achsabstand zwischen dem Gummi- und dem Gegendruckzylinder bzw. zwischen den beiden Gumnizylindern dadurch stufenlos einstellen, indem beispielsweise mittels einer Spindel der Gegendruckzylinder in seiner Achsrichtung verschoben wird. Der Achsabstand zwischen dem Platten- und dem Gummizylinder verändert sich dadurch nicht.The object is achieved in a generic printing unit in that for changing the distance between the impression cylinder or the further rubber cylinder and rubber cylinder or the first rubber cylinder, the cones of the bearer rings on the rubber cylinder or the first rubber cylinder have the same direction and the same cone angle and the cones of Bearings of the impression cylinder or further blanket cylinder have the opposite direction and the same cone angle as the bearer rings of the blanket cylinder or the first blanket cylinder.
In the printing unit according to the invention, the center distance between the rubber and the impression cylinder or between the two gum cylinders can be adjusted continuously, for example, by moving the impression cylinder in its axial direction by means of a spindle. The axis distance between the plate and the rubber cylinder does not change.

Weitere vorteilhafte Merkmale ergeben sich aus den abhängigen Patentansprüchen, der nachfolgenden Beschreibung sowie der Zeichnung.Further advantageous features result from the dependent ones Claims, the description below and the Drawing.

Zwei Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
schematisch eine Ansicht eines erfindungsgemässen Druckwerkes,
Fig. 2
schematisch einen Schnitt durch das Druckwerk nach Figur 1, und
Fig. 3
schematisch eine Ansicht eines Druckwerkes nach einer Variante.
Two exemplary embodiments of the invention are explained in more detail below with reference to the drawing. Show it:
Fig. 1
schematically a view of a printing unit according to the invention,
Fig. 2
schematically shows a section through the printing unit according to Figure 1, and
Fig. 3
schematically a view of a printing unit according to a variant.

Das in Figur 1 gezeigte Druckwerk 30 weist einen an sich üblichen Plattenzylinder 1 auf, der in Seitenschildern 4 und 5 gelagert ist. Die hier nicht näher gezeigte Lagerung ist hier wie üblich ausgebildet. Der Plattenzylinder 1 ist mit zylindrischen Schmitzringen 6 und 7 versehen, die auf zylindrischen Schmitzringen 8 und 9 eines Gummizylinders abrollen. Zur Befestigung der hier nicht gezeigten Druckplatten weist der Plattenzylinder 1 eine bekannte Einspannvorrichtung 19 auf. An dieser werden die Platten an abgebogenen Rändern befestigt. Der Gummizylinder 2 weist ebenfalls eine Einspannvorrichtung 20 auf, mit welcher das hier nicht gezeigte Gummituch aufgespannt ist. An den beiden Einspannvorrichtungen 19 und 20 besteht zwischen den Spannkannten ein Spalt von beispielsweise 8 mm, der bei Druckwerken nach dem Stand der Technik den oben genannten Kanalschlag verursachen kann.The printing unit 30 shown in FIG. 1 has a conventional one Plate cylinder 1 on the side plates 4 and 5 is stored. The storage not shown here is here trained as usual. The plate cylinder 1 is cylindrical Bearings 6 and 7 provided on cylindrical Unroll bearer rings 8 and 9 of a rubber cylinder. To attach the pressure plates not shown here the plate cylinder 1 is a known clamping device 19 on. The plates are attached to this at bent edges. The rubber cylinder 2 also has a clamping device 20 with which the rubber blanket, not shown here is spanned. On the two jigs 19 and 20 there is a gap between the clamping edges for example 8 mm, which is the case with printing units according to the prior art Technology can cause the above-mentioned channel blow.

Der Gummizylinder 2 weist auf seinen beiden Seiten zusätzliche konische Schmitzringe 10 und 11 auf, die auf konischen Schmitzringen 12 und 13 eines Gegendruckzylinders 3 abrollen.The rubber cylinder 2 has additional on both sides conical bearer rings 10 and 11 on conical Unroll bearer rings 12 and 13 of an impression cylinder 3.

Wie ersichtlich, haben Konen 26 und 27 der Schmitzringe 10 und 11 auf dem Gummizylinder 2 die gleiche Richtung und den gleichen Kegelwinkel. Konen 28 und 29 der Schmitzringe 12 und 13 haben die entgegengesetzte Richtung und den gleichen Kegelwinkel wie die Konen 26 und 27 der Schmitzringe 10 und 11. As can be seen, cones 26 and 27 of the bearer rings 10 and 11 on the blanket cylinder 2 in the same direction and same cone angle. Cones 28 and 29 of the bearer rings 12 and 13 have the opposite direction and the same cone angle like the cones 26 and 27 of the bearer rings 10 and 11.

Die Wellenenden 22 des Gummizylinders sind durch Federn 41 belastet und dadurch rollen die Schmitzringe 8, 9 des Gummizylinders 2 auf den Schmitzringen 6, 7 des Plattenzylinders 1 unter Druck ab. Ebenso die Schmitzringe 10, 11 des Gummizylinders 2 auf den Schmitzringen 12, 13 des Gegendruckzylinders 3.The shaft ends 22 of the rubber cylinder are by springs 41 loaded and thereby roll the bearer rings 8, 9 of the blanket cylinder 2 on the bearer rings 6, 7 of the plate cylinder 1 under pressure. Likewise, the bearer rings 10, 11 of the blanket cylinder 2 on the bearer rings 12, 13 of the impression cylinder Third

Am Seitenschild 4 ist eine Spindel 14 angeordnet, mit welcher der Gegendruckzylinder 3 in seiner Achsrichtung verschiebbar ist. Bei einer solchen Verschiebung ändert sich der Achsabstand A zwischen Gummi- 2 und Gegendruckzylinder 3, während der Achsabstand B zwischen dem Platten- 1 und dem Gummizylinder 2 unverändert bleibt.On the side plate 4, a spindle 14 is arranged, with which the impression cylinder 3 is displaceable in its axial direction is. With such a shift, the center distance changes A between rubber 2 and impression cylinder 3, while the center distance B between the plate 1 and the rubber cylinder 2 remains unchanged.

Am Seitenschild 4 ist zudem eine weitere Spindel 15 angebracht, mit welcher der Plattenzylinder 1 axial verschiebbar ist, um beispielsweise das Druckbild auf dem Bedruckstoff seitlich einzustellen. Bei einer solchen Verschiebung ändern sich jedoch die Achsabstände A und B der Zylinder 1, 2 und 3 nicht.A further spindle 15 is also attached to the side plate 4, with which the plate cylinder 1 axially displaceable is, for example, the print image on the substrate adjust laterally. Change at such a shift however, the center distances A and B of cylinders 1, 2 and 3 Not.

Die Figur 3 zeigt ein erfindungsgemässes Druckwerk 40, bei dem ein Plattenzylinder 31 konische Schmitzringe 35 und 37 aufweist, die auf ebenfalls konischen Schmitzringen 36 und 38 eines Gummizylinders 32 abrollen. Die Schmitzringe des Gummizylinders 32 wiederum rollen auf den Schmitzringen 12 und 13 des Gegendruckzylinders 33 ab. Die beim Druckwerk 30 vorgesehenen zylindrischen Schmitzringe 8 und 9 sind bei dieser Ausführungsvariante nicht erforderlich. Der Gegendruckzylinder 33 kann auch hier mittels einer Spindel 14 zum Ändern des Achsabstandes zwischen den Zylindern 32 und 33 in Achsrichtung verschoben werden. Mittels einer Spindel 34, die an einem festen Gestellteil 39 abgestützt ist, können hier die drei Zylinder 31, 32, und 33 um den gleichen Betrag axial verschoben werden, um das Druckbild seitlich einzustellen. Die Achsabstände werden hierbei nicht geändert. FIG. 3 shows a printing unit 40 according to the invention, at which a plate cylinder 31 conical bearer rings 35 and 37 which also on conical bearer rings 36 and 38 roll of a rubber cylinder 32. The bearer rings of the rubber cylinder 32 in turn roll on bearer rings 12 and 13 of the impression cylinder 33. The provided at the printing unit 30 cylindrical bearer rings 8 and 9 are in this embodiment not mandatory. The impression cylinder 33 can also be changed here by means of a spindle 14 Center distance between the cylinders 32 and 33 in the axial direction be moved. By means of a spindle 34 which on a fixed frame part 39 is supported here three cylinders 31, 32, and 33 axially by the same amount can be moved to adjust the print image laterally. The center distances are not changed here.

Beim Druckwerk 30 als auch beim Druckwerk 40 werden die Zylinder 1 bis 3 bzw. 31 bis 33 mit Zahnrädern 16, 17 und 18 angetrieben. Die Zahnräder 17 und 18, welche die bezüglich des Achsabstandes einstellbaren Zylinder 2 und 3 bzw. 32 und 33 antreiben, müssen für den kleinsten Achsabstand eingestellt sein, um nicht zu klemmen. Wird der Achsabstand vergrössert, so erhält man ein Zahnspiel, das unerwünscht ist, weil es zu Druckproblemen führt. Dieses Zahnspiel kann durch an sich bekannte und hier nicht gezeigte Beiläuferzahnräder aufgehoben werden.In the printing unit 30 as well as in the printing unit 40, the cylinders 1 to 3 or 31 to 33 with gears 16, 17 and 18 driven. The gears 17 and 18, which the of the center distance adjustable cylinders 2 and 3 or 32 and 33 drive must be set for the smallest center distance so as not to jam. If the center distance is increased, so you get a backlash that is undesirable, because it creates printing problems. This play of teeth can by per se known and not shown idler gears To get picked up.

Das genannte Zahnspiel lässt sich jedoch durch eine geschickte Wahl der Schmitzringdurchmesser unwirksam machen. Ist der Abrolldurchmesser der Schmitzringe auf dem treibenden Zylinder, beispielsweise dem Zylinder 3 bzw. 33 kleiner als der Abrolldurchmesser der Schmitzringe auf dem getriebenen Zylinder, beispielsweise dem Zylinder 2 bzw. 32, so wird der getriebene Zylinder entsprechend dem Verhältnis der genannten Abrolldurchmesser langsamer drehen als der treibende Zylinder. Sind nun die Zylinder 1 bis 3 bzw. 31 bis 33 wie hier gezeigt durch Zahnräder 16 bis 18 mit gleicher Zähnezahl verbunden, so werden die Zylinder gezwungen, mit gleicher Drehzahl zu laufen. Zwischen den Schmitzringen der Zylinder 2 und 3 bzw. 32 und 33 entsteht dabei in Umfangsrichtung eine Relativbewegung. Da nun diese Schmitzringe 2 und 3 bzw. 32 und 33 unter Druck aufeinander abrollen, entsteht zwischen diesen eine Reibkraft, die ein vorhandenes Zahnspiel unwirksam und die aufwendigen Beiläuferzahnräder überflüssig macht.The tooth play mentioned can, however, be skilful Make the selection of the bearer ring diameter ineffective. Is the Rolling diameter of the bearer rings on the driving cylinder, for example, the cylinder 3 or 33 smaller than that Rolling diameter of the bearer rings on the driven cylinder, For example, cylinder 2 or 32, the driven one Cylinder according to the ratio of the above Turn the rolling diameter more slowly than the driving cylinder. Are cylinders 1 to 3 or 31 to 33 like this shown connected by gears 16 to 18 with the same number of teeth, the cylinders are forced at the same speed to run. Between the bearer rings of cylinders 2 and 3 or 32 and 33 a relative movement occurs in the circumferential direction. Since these bearer rings 2 and 3 or 32 and 33 rolling under pressure on each other arises between them a frictional force that makes an existing backlash ineffective and eliminates the need for complex idler gears.

Das erfindungsgemässe Druckwerk kann auch vier Arbeitszylinder in der Reihenfolge: Platten-, Gummi-, Gummi- und Plattenzylinder aufweisen. Bei dieser Ausführung sind dann die beiden Gummizylinder an ihren Stirnseiten mit konischen Schmitzringen versehen und können im axialen Abstand zueinander stufenlos eingestellt werden. Beim Druckwerk 30 wäre dann der Gegendruckzylinder 3 durch einen weiteren Gummizylinder und einen weiteren Plattenzylinder ersetzt. Dieser weitere Gummizylinder und der Gummizylinder 2 wären dann jeweils mit konischen Schmitzringen versehen und können im Abstand zueinander stufenlos eingestellt werden.The printing unit according to the invention can also have four working cylinders in the order: plate, rubber, rubber and plate cylinders exhibit. In this version, the two are Rubber cylinders on their faces with conical bearer rings provided and can be steplessly spaced axially from each other can be set. The printing unit 30 would then be the Impression cylinder 3 by another blanket cylinder and replaced another plate cylinder. This other rubber cylinder and the rubber cylinder 2 would then each be conical Bearings provided and can be spaced apart can be adjusted continuously.

Claims (3)

  1. A printing unit (30, 40) for a printing machine, particularly a rotary offset printing machine, comprising at least one plate cylinder (1, 31) or a first plate cylinder, a blanket cylinder (2, 32) or a first blanket cylinder, and a counter-pressure cylinder (3, 33) or a further blanket cylinder and a further plate cylinder, wherein on each of its two end faces the blanket cylinder (2, 32) or the first blanket cylinder comprises a conical bearing ring (10, 11, 36, 38) which runs under pressure on a conical bearing ring (12, 13) on the end faces of the counter-pressure cylinder (3, 33) or of the further blanket cylinder, characterised in that in order to vary the spacing between the counter-pressure cylinder (3, 33) or the further blanket cylinder and the blanket cylinder (2, 32) or the first blanket cylinder, the cones (26, 27) of the bearing rings (10, 11, 36, 38) are oriented in the same direction on the blanket cylinder (2, 32) or on the first blanket cylinder and have the same cone angle, and the cones (28, 29) of the bearing rings (12, 13) of the counter-pressure cylinder (3, 33) or of the further blanket cylinder are oriented in the opposite direction and have the same cone angle as the bearing rings (10, 11, 36, 38) of the blanket cylinder (2, 32) or of the first blanket cylinder.
  2. A printing unit according to claim 1, characterised in that the counter-pressure cylinder (3, 33) or the further blanket cylinder can be displaced axially by means of a spindle (14) in order to vary the spacing (A) of this cylinder from the blanket cylinder (2, 32) or from the first blanket cylinder.
  3. A printing unit according to claims 1 or 2, characterised in that the blanket cylinder (2) has a cylindrical bearing ring (8, 9) and a conical bearing ring (10, 11) on each of its end faces.
EP98810217A 1998-03-16 1998-03-16 Printing unit for a printing machine, particularly rotary offset printing machine Expired - Lifetime EP0943433B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59804990T DE59804990D1 (en) 1998-03-16 1998-03-16 Printing unit for a printing machine, in particular offset rotary machine
EP98810217A EP0943433B1 (en) 1998-03-16 1998-03-16 Printing unit for a printing machine, particularly rotary offset printing machine
JP11067152A JP2000033686A (en) 1998-03-16 1999-03-12 Printing press especially printer for offset rotary press
US09/268,689 US6314881B1 (en) 1998-03-16 1999-03-16 Printing group for a printing press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810217A EP0943433B1 (en) 1998-03-16 1998-03-16 Printing unit for a printing machine, particularly rotary offset printing machine

Publications (2)

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EP0943433A1 EP0943433A1 (en) 1999-09-22
EP0943433B1 true EP0943433B1 (en) 2002-07-31

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FR2827544B1 (en) * 2001-07-23 2003-10-17 Goss Systemes Graphiques Nante IMPROVED CYLINDER MOUNTED OFFSET PRESS
US6997108B2 (en) * 2001-08-21 2006-02-14 Mitsubishi Heavy Industries, Ltd. Plate-making type printing press, multi-color printing press and plate-making type printing method
ATE365106T1 (en) * 2002-08-19 2007-07-15 Bobst Sa ROTARY PRESS FOR ATTACHING PICTURES TO A SUBSTRATE
DE10327490B4 (en) * 2003-06-17 2006-09-21 Koenig & Bauer Ag Printing unit of a rotary printing machine
DE102006062282A1 (en) * 2006-12-22 2008-07-03 Kba-Metronic Ag Low-wear bearer rings
DE102008041776A1 (en) * 2008-09-03 2010-03-04 Manroland Ag Bearer ring for cylinder e.g. plate cylinder, in rotary printing press, has bearing surface exhibiting profile form running from vertical middle axis of bearing surface to circular boundary areas on both sides
JP2010211105A (en) 2009-03-12 2010-09-24 Seiko Epson Corp Image forming apparatus and method
ATE522354T1 (en) * 2009-04-15 2011-09-15 Mueller Martini Holding Ag DEVICE FOR PROCESSING A MATERIAL WEB BETWEEN TWO OPPOSITELY DRIVEN WORK ROLLS
DE102010001747B4 (en) 2010-02-10 2011-11-17 Koenig & Bauer Aktiengesellschaft Schmitzring and a method for reversibly changing an outer radius of a bearer ring
US9248639B2 (en) * 2011-06-03 2016-02-02 Hewlett-Packard Development Company, L.P. Imaging device having fluid container and method for collecting carrier fluid
WO2014136631A1 (en) * 2013-03-06 2014-09-12 富士フイルム株式会社 Recording medium transporting device and inkjet recording device
DE102016215761B4 (en) 2016-08-23 2024-01-11 Koenig & Bauer Ag Cylinder for a sheet processing machine

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US3732813A (en) * 1972-01-03 1973-05-15 Rockwell International Corp Bearer arrangement for printing press
CH673623A5 (en) * 1987-06-19 1990-03-30 Grapha Holding Ag
DE4129840A1 (en) 1991-09-09 1992-04-09 Koenig & Bauer Ag METHOD AND ARRANGEMENT FOR ADJUSTING EXCENTRIC BUSHINGS FOR CYLINDERS OF PRINTING MACHINES
DE19501243C5 (en) * 1995-01-17 2004-01-29 Maschinenfabrik Wifag Bearings bearing for a cylinder of a rotary printing machine
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FR2756214B1 (en) * 1996-11-28 1999-02-12 Heidelberg Harris Sa DEVICE FOR MOVING CYLINDERS OF A TWO-SIDED PRINTING UNIT OF A ROTARY PRINTING MACHINE

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JP2000033686A (en) 2000-02-02
US6314881B1 (en) 2001-11-13
EP0943433A1 (en) 1999-09-22
DE59804990D1 (en) 2002-09-05

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