EP1157855B1 - Rubber sleeve, especially for rotary offset printing presses - Google Patents

Rubber sleeve, especially for rotary offset printing presses Download PDF

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Publication number
EP1157855B1
EP1157855B1 EP01112326A EP01112326A EP1157855B1 EP 1157855 B1 EP1157855 B1 EP 1157855B1 EP 01112326 A EP01112326 A EP 01112326A EP 01112326 A EP01112326 A EP 01112326A EP 1157855 B1 EP1157855 B1 EP 1157855B1
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EP
European Patent Office
Prior art keywords
joint
sleeve
layer
blanket cylinder
cylinder sleeve
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
EP01112326A
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German (de)
French (fr)
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EP1157855A1 (en
Inventor
Eduard Dr. Hoffmann
Peter Knauer
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication of EP1157855A1 publication Critical patent/EP1157855A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/06—Blanket structure facilitating fastening to, or location on, supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers

Definitions

  • the invention relates to a rubber sleeve according to the preamble of claim 1.
  • a similar device is known from EP-A-0819550 known.
  • Such sleeves are for example from the U.S. Patents 5,429,048 . 5 323 702 . 5,440,981 and 5,304,267 known.
  • a disadvantage of these known rubber cylinder sleeves is that the middle and lower layers thereof must be at least partially continuous. This has a particularly disadvantageous effect on the production costs.
  • Object of the present invention is to produce a generic rubber cylinder sleeve, in particular for offset web-fed rotary printing machines, compared to the known sleeves of this type cheaper at about the same or improved print quality and behavior.
  • the object is solved by the application of the features of independent claim 1.
  • the rubber cylinder sleeve is inexpensive to create. In addition, it allows good print quality, as it allows the filled with the compressible material joint break down tangential forces during Abrollessores with other printing cylinders.
  • the basic structure of such rubber cylinder sleeves consists essentially of an inner, preferably metallic sleeve.
  • GFP glass fiber reinforced sleeve
  • These sleeves are sized in thickness so that they can be slightly widened by air when pushed onto the transfer cylinder, which is usually called rubber cylinders in printing presses operating according to indirect printing methods. This is advantageous because it, in particular the U.S. Patent No. 5,429,048 shows, such a sleeve can be pushed through the side wall of a printing press on the previously unilaterally exposed transfer cylinder.
  • At least one further layer is applied - directly or indirectly - which is compressible, ie, the Air entrapments has.
  • at least one cover layer is provided, which may for example consist of an elastomeric material. With this material is taken from a forme cylinder or from a printing form, such as an offset printing plate or a sleeve-shaped offset printing form, the image to be printed and transferred to a print carrier.
  • another non-stretchable layer is provided between the compressible layer (eg an elastomer with air inclusions) and the cover layer, for example in the form of a hard elastomeric material or, for example, in the form of short fibers (eg filaments) which also embedded in the hard elastomeric material.
  • a non-stretchable layer or non-stretchable particles such as filaments or pieces of filaments may also be directly introduced into the aforementioned volume-compressible layer.
  • the transfer cylinder with 1 (blanket cylinder) and the openings or nozzles provided on its surface are designated 1a.
  • the transfer cylinder sleeve 2 (rubber blanket sleeve) applied in the manner described above has, as stated above, a metal sleeve 3 preferably expandable by air, on which a compressible layer 4 is vulcanized or adhesively bonded.
  • a layer of a non-stretchable material 5 preferably a hard elastomer layer with short fibers, which are not specified, is provided.
  • a cover layer 6 is provided, for example, from an elastic material with which can be printed in the offset printing process.
  • a metal sleeve is preferably used as a carrier sleeve 3, for example made of steel, which is expandable by air and which has a joint 7.
  • This joint 7 may for example be a weld, which is advantageously formed by the fact that the metallic sleeve is made of a plate whose ends are welded together, so that the joint 7 results.
  • the carrier sleeve 3 can also be designed without impact and gap, in which case the joint 7 drawn in FIG. 1 is omitted. In a metallic such execution, the preparation is recommended by galvanic means. Non-metallic carrier sleeves 3 are advantageously produced without impact and gap.
  • a sleeve or cylindrical rubber or plastic layer or a sleeve or cylindrical metallic or non-metallic carrier in the circumferential direction is not endless, so not seamless or not continuous, ie, that in the longitudinal or axial direction a seam or a push is present.
  • the joint may have abutting layers. It may also present itself as a gap between the ends of a layer, which is advantageously closed with an adhesive or vulcanizable material.
  • the compressible layer 4 also has a joint 8, which may be prepared by adhering to the metal shell 3 the compressible layer 4 in the form of a blanket, so that the joint 8 are formed by the ends of the rubber layer 4.
  • a non-stretchable layer 5 is used on the compressible layer 4, it may also according to the invention have a joint 9 which may be formed in the manner described above.
  • such a layer structure i. H. a carrier sleeve 3 preferably made of metal with a joint 7 and at least one applied compressible layer 4 with a joint 8, a cover layer 6 applied without joint.
  • cover layer 6 - as well as the compressible layer 4 - air inclusions, so that the cover layer 6 has a certain compressibility, which is advantageous over the prior art and lead to better printing results and printing behavior and better web guide can.
  • the sleeve according to the invention can also be made particularly advantageous in that a welded metal sleeve 3 made of steel or aluminum or for example a CFRP sleeve is used with a joint on which a conventional offset blanket, z. B. with a compressible layer applied, for example, is glued or vulcanized or is. Thereafter, the cover layer of the conventional blanket is removed, for example abraded and replaced by a continuous, d. H. a shock-free cover layer 6 applied, for example, vulcanized.
  • the joints 8, 9 are one above the other, as they represent the ends of the conventional blanket, which has been glued to the support sleeve 3.
  • the joints 8, 9 can advantageously - but not necessarily - be located directly above the joint 7.
  • the individual joints 7, 8, 9 are also circumferentially at other locations ie they do not have to lie one above the other as shown.
  • the sleeve 2 of the invention offers a variety of uses, which are not limited to the use of offset web-fed rotary printing presses.
  • this sleeve 2 can also be used for example in other indirect printing methods, such as indirect gravure printing, or used as a roller.
  • sleeve 2 it is advantageous to apply the sleeve 2 in register. This can be done, for example, that the sleeve 2 is pushed in a predetermined circumferential position.
  • the cover layer 6 may have a shock or a gap, as indicated at 16. If the gap 16 or the bumps or gaps are relatively large, they may be coated with a suitable material, e.g. an adhesive or vulcanizable material.
  • the metal layer 3 on the transfer cylinder 1 By a corresponding tight fit of the sleeve 2, for example, the metal layer 3 on the transfer cylinder 1, it can be ensured that the sleeve 2 remains fixed in the register position during operation.
  • all layers 3 to 6 are provided with a joint 7, 8, 9, 16 or a gap. It may also be present only in some or in a single layer, for example in the cover layer 6, a joint or a gap 16. It therefore accounts for the joints 7 to 9.
  • the rubber cylinder sleeve 2 is necessarily register properly applied to the transfer cylinder 1, so such that the joint or the gap 16 in Abroll Scheme with the plate cylinder 15 whose clamping channel 14 is opposite.
  • a particular embodiment of the invention is to make only the outer layer 6, so the print image receiving layer, elastic, that is preferably only the lower portion or part with z. As trapped air or possibly downwardly open air channels.
  • Such a trained layer in which also non-stretchable materials, eg. As threads or pieces of thread can be arranged, can be arranged directly on a support sleeve.
  • the layer 3 of fiber reinforced hard rubber with or without seam or gap - the z. B. can be stretched by compressed air, and this can be a compressible layer, then a semi-compressible layer, which may be fiber reinforced, and then a printing cover layer to be arranged, which is very beneficial.
  • the rubber cylinder sleeve 2.1 shown in Figure 2 is similar in the layer structure of the rubber cylinder sleeve just described according to Figure 1. For the sake of simplicity, therefore, the previous reference numerals are largely retained or provided with an addition ".1" for recurring or similar elements.
  • a carrier sleeve 3 is used, which has a joint 7.
  • the carrier sleeve 3 is made in this case of a plate whose ends are welded together, so that the joint 7 results.
  • the carrier sleeve 3 is advantageously made of steel.
  • These layers 4, 5, 6 are finite, not so continuous, with a gap remaining between their ends.
  • the gaps are located above the joint 7 of the carrier sleeve and are all filled with a compressible material 18 so that each layer 4, 5, 6 has a joint 8.1, 9.1, 16.1 formed by this compressible material 18.
  • the compressible layer 4 and the non-stretchable layer 5 are continuously executed without joint and only the joint 16.1 in the outer cover layer 16 is present.
  • the support sleeve 3 may be carried out continuously, for example, as an electroplated nickel sleeve.
  • the transfer cylinder 1, to which the rubber cylinder sleeve 2.1 can be pushed, as well as the rubber cylinder sleeve 2.1 aids for registration.
  • it is a mounted on the inner wall of the support sleeve 3 bar 3a, which is inserted in the assembly of the rubber cylinder sleeve 2.1 in an axially extending slot 17 of the transfer cylinder 1.
  • the assembly and removal of the rubber cylinder sleeve 2.1 is possible after the elastic expansion by means of the nozzles 1a supplied compressed air.
  • the width b1 of the joint 16.1 is dimensioned approximately in the size of the width b of the clamping channel 14 of the cooperating with the transfer cylinder 1 plate cylinder 15, so practically about 1 to 3mm.
  • the rubber cylinder sleeve 2.1 is brought into registry on the transfer cylinder 1 such that its abutment 16.1 comes to lie in the cover layer 6 during rolling contact with the plate cylinder 15 with respect to its clamping channel 14.
  • the joint 16.1 can also be brought to coincide with a pressure-free region B (FIG. 3) of the printed image of a printing form stretched on the plate cylinder 15.
  • a pressure-free region B FIG. 3
  • FIG. 3 shows a rubber cylinder sleeve 2.2, in which only the outer cover layer 6 has a joint 16.2, while the compressible layer 4 and the non-stretchable layer 5 without joint, so are endless.
  • the cover layer 6 is brought as a plate on the non-stretchable layer 5, z. B. glued, the later joint 16.2 forming ends containing air bubbles 10 and are vulcanized to each other.
  • the carrier sleeve 3 is designed bumpless. It has on its inner wall in turn on a bar 3a, which cooperates with a slot 17 of the transfer cylinder 1 such that the joint 16.2 coincides when rolling contact with the plate cylinder 15 with the pressure-free region B of the printed image of the printing plate 19.

Description

Die Erfindung betrifft eine Gummihülse gemäß dem Oberbegriff des Anspruchs 1. Eine ähnliche Vorrichtung ist aus der EP-A-0819550 bekannt.The invention relates to a rubber sleeve according to the preamble of claim 1. A similar device is known from EP-A-0819550 known.

Derartige Hülsen sind beispielsweise aus den US-Patentschriften 5 429 048 , 5 323 702 , 5 440 981 und 5 304 267 bekannt. Ein Nachteil dieser bekannten Gummizylinderhülsen (Transferzylinderhülsen) ist es, daß die mittleren und unteren Schichten derselben zumindest teilweise kontinuierlich sein müssen. Dies wirkt sich besonders nachteilig auf die Herstellkosten aus.Such sleeves are for example from the U.S. Patents 5,429,048 . 5 323 702 . 5,440,981 and 5,304,267 known. A disadvantage of these known rubber cylinder sleeves (transfer cylinder sleeves) is that the middle and lower layers thereof must be at least partially continuous. This has a particularly disadvantageous effect on the production costs.

Aus der US-Patentschrift 5 351 615 ist es außerdem bekannt, auf eine Trägerplatte ein Gummituch aufzubringen, z. B. durch Kleben. Danach wird diese Anordnung zu einer Gummizylinderhülse geformt und sowohl die aufeinander zuweisenden Enden der Trägerplatte als auch die des Gummituches, bzw. Gummibelages miteinander verbunden, z. B. durch Verschweißen oder Verkleben. Diese Anordnung zeigt zwar keine Spalt mehr, jedoch verbleibt an der Oberfläche eine Verbindungsnaht, bzw. eine Stoßstelle.From the U.S. Patent 5,351,615 It is also known to apply a blanket to a carrier plate, for. B. by gluing. Thereafter, this arrangement is formed into a rubber cylinder sleeve and both the facing each other ends of the support plate and the rubber blanket, or rubber bonded together, z. B. by welding or gluing. Although this arrangement no longer shows a gap, a connection seam or a joint remains on the surface.

Bei der in der US-PS 5 429 048 gezeigten Gummizylinderhülse ist deren Außenschicht kontinuierlich hülsenförmig und besteht aus einem inkompressiblen Material. Abgesehen von den bereits angesprochenen höheren Herstellungskosten hat eine kontinuierliche Außenschicht den Nachteil, dass die Gummituchhülse beim Abrollkontakt mit einem Form- und einem Gegendruckzylinder mit Tangentialkräften belastet wird, denen sich mit jeder Umdrehung weitere Kräfte hinzu addieren. Es stellt sich eine hohe Belastung der Gummituchhülse ein. Diese Belastung wirkt sich auch nachteilig auf die Druckqualität aus (z. B. durch Schlupfneigung der Gummituchhülse zur zu bedruckenden Bahn im Druckspalt und im Abrollspalt zu einem Plattenzylinder).When in the U.S. Patent No. 5,429,048 shown rubber cylinder sleeve whose outer layer is continuously sleeve-shaped and consists of an incompressible material. Apart from the already mentioned higher production costs, a continuous outer layer has the disadvantage that the blanket sleeve is loaded during rolling contact with a form and an impression cylinder with tangential forces, which add additional forces with each revolution. It turns a high load on the blanket sleeve. This load also has an adverse effect on the print quality (eg due to the tendency of the blanket sleeve to slip towards the web to be printed in the printing nip and in the unwinding nip to a plate cylinder).

Aufgabe der vorliegenden Erfindung ist es, eine gattungsbildende Gummizylinderhülse, insbesondere für Offset-Rollenrotationsdruckmaschinen, im Vergleich zu den bekannten Hülsen dieser Art billiger herzustellen bei etwa gleicher oder verbesserter Druckqualität und Verhalten.Object of the present invention is to produce a generic rubber cylinder sleeve, in particular for offset web-fed rotary printing machines, compared to the known sleeves of this type cheaper at about the same or improved print quality and behavior.

Die Aufgabe wird durch die Anwendung der Merkmale des unabhängigen Patentanspruchs 1 gelöst. Die Gummizylinderhülse ist kostengünstig erstellbar. Außerdem ermöglicht sie eine gute Druckqualität, da es die mit dem kompressiblen Material ausgefüllte Stoßstelle erlaubt, tangentiale Kräfte während des Abrollkontaktes mit anderen Druckwerkzylindern abzubauen.The object is solved by the application of the features of independent claim 1. The rubber cylinder sleeve is inexpensive to create. In addition, it allows good print quality, as it allows the filled with the compressible material joint break down tangential forces during Abrollkontaktes with other printing cylinders.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und aus der Beschreibung in Verbindung mit den Zeichnungen.Advantageous developments of the invention will become apparent from the dependent claims and from the description in conjunction with the drawings.

Wie aus dem Stand der Technik, wie er beispielsweise im vorangehenden dargelegt wurde, bekannt ist, besteht der grundsätzliche Aufbau derartiger Gummizylinderhülsen im wesentlichen aus einer inneren, vorzugsweise metallischen Hülse. Jedoch kann auch mit Vorteil anstelle der inneren Metallhülse beispielsweise eine glasfaserverstärkte Hülse (GFK) verwendet werden. Diese Hülsen sind in ihrer Dicke so bemessen, daß sie beim Aufschieben auf den Transferzylinder, der üblicherweise bei nach indirekten Druckverfahren arbeitenden Druckmaschinen Gummizylinder genannt wird, durch Luft geringfügig aufgeweitet werden können. Dies ist von Vorteil, da dadurch, wie insbesondere die US-PS 5 429 048 zeigt, eine derartige Hülse durch die Seitenwand einer Druckmaschine auf den zuvor einseitig freigelegten Übertragungszylinder aufgeschoben werden kann. Dabei wird eben mit Hilfe von in dem Übertragungszylinder vorgesehenen Öffnungen die aufzuschiebende Hülse mit Druckluft aufgeweitet, so daß ein Aufbringen in einfacher Weise möglich ist, wonach nach Wegnahme der Druckluft die aufgeschobene Hülse einen festen Sitz auf dem Übertragungszylinder einnimmt.As known from the prior art, as set forth for example in the foregoing, the basic structure of such rubber cylinder sleeves consists essentially of an inner, preferably metallic sleeve. However, it is also advantageous to use a glass fiber reinforced sleeve (GRP) instead of the inner metal sleeve. These sleeves are sized in thickness so that they can be slightly widened by air when pushed onto the transfer cylinder, which is usually called rubber cylinders in printing presses operating according to indirect printing methods. This is advantageous because it, in particular the U.S. Patent No. 5,429,048 shows, such a sleeve can be pushed through the side wall of a printing press on the previously unilaterally exposed transfer cylinder. It is just with the help of provided in the transfer cylinder openings aufzuschiebende sleeve expanded with compressed air, so that application in a simple manner is possible, after which after removal of the compressed air, the deferred sleeve assumes a tight fit on the transfer cylinder.

Auf dieser inneren, vorzugsweise metallischen Trägerhülse ist mindestens eine weitere Schicht - direkt oder indirekt - aufgebracht, die kompressibel ist, d. h., die Lufteinsclüsse aufweist. Über dieser Schicht ist zumindest eine Deckschicht vorgesehen, die beispielsweise aus einem elastomeren Material bestehen kann. Mit diesem Material wird von einem Formzylinder bzw. von einer Druckform, beispielsweise einer Offsetdruckplatte oder einer hülsenförmigen Offsetdruckform, das zu druckende Bild übernommen und auf einen Druckträger übertragen.On this inner, preferably metallic carrier sleeve at least one further layer is applied - directly or indirectly - which is compressible, ie, the Air entrapments has. Over this layer at least one cover layer is provided, which may for example consist of an elastomeric material. With this material is taken from a forme cylinder or from a printing form, such as an offset printing plate or a sleeve-shaped offset printing form, the image to be printed and transferred to a print carrier.

Vorzugsweise ist zwischen der kompressiblen Schicht (z. B. ein Elastomer mit Lufteinschlüssen) und der Deckschicht eine weitere nicht dehnbare Schicht vorgesehen, beispielsweise in Form eines harten elastomeren Materials oder beispielsweise in Form von kurzen Fasern (z. B. Fäden), die auch in dem harten elastomeren Material eingebettet sein können. Alternativ kann auch eine nicht dehnbare Schicht oder nicht dehnbare Teilchen, wie Fäden oder Stücke aus Fäden, in der vorgenannten volumenkompressiblen Schicht direkt eingebracht werden.Preferably, another non-stretchable layer is provided between the compressible layer (eg an elastomer with air inclusions) and the cover layer, for example in the form of a hard elastomeric material or, for example, in the form of short fibers (eg filaments) which also embedded in the hard elastomeric material. Alternatively, a non-stretchable layer or non-stretchable particles such as filaments or pieces of filaments may also be directly introduced into the aforementioned volume-compressible layer.

Die Erfindung soll nachfolgend an einigen Ausführungsbeispielen näher erläutert werden. In den zugehörigen Zeichnungen zeigt schematisch:

Fig. 1:
teilweise einen Transferzylinder mit Gummituchhülse und einen Plattenzylinder im Querschnitt
Fig. 2:
eine weitere Variante zu Figur 1
Fig. 3:
eine dritte Variante zu Figur 1.
The invention will be explained in more detail below with reference to some embodiments. In the accompanying drawings shows schematically:
Fig. 1:
partially a transfer cylinder with blanket sleeve and a plate cylinder in cross section
Fig. 2:
a further variant of Figure 1
3:
a third variant of Figure 1.

In der Figur 1 sind der Transferzylinder mit 1 (Gummituchzylinder) und die an seiner Oberfläche vorgesehenen Öffnungen bzw. Düsen mit 1a bezeichnet. Die in der vorbeschriebenen Weise aufgebrachte Transferzylinderhülse 2 (Gummituchhülse) weist, wie vorangehend dargelegt wurde, eine vorzugsweise durch Luft aufweitbare Metallhülse 3 auf, auf der eine kompressible Schicht 4 aufvulkanisiert oder aufgeklebt ist. Auf der kompressiblen Schicht 4 ist eine Schicht aus einem nicht dehnbaren Material 5, vorzugsweise eine harte Elastomerschicht mit kurzen Fasern, die nicht näher bezeichnet sind, vorgesehen. Auf der nicht dehnbaren Schicht 5 ist eine Deckschicht 6 vorgesehen, beispielsweise aus einem elastischen Material, mit der im Offsetdruckverfahren gedruckt werden kann.In FIG. 1, the transfer cylinder with 1 (blanket cylinder) and the openings or nozzles provided on its surface are designated 1a. The transfer cylinder sleeve 2 (rubber blanket sleeve) applied in the manner described above has, as stated above, a metal sleeve 3 preferably expandable by air, on which a compressible layer 4 is vulcanized or adhesively bonded. On the compressible layer 4, a layer of a non-stretchable material 5, preferably a hard elastomer layer with short fibers, which are not specified, is provided. On the non-stretchable layer 5, a cover layer 6 is provided, for example, from an elastic material with which can be printed in the offset printing process.

Gemäß der Erfindung wird als Trägerhülse 3 vorzugsweise eine Metallhülse verwendet, beispielsweise aus Stahl, die durch Luft aufweitbar ist und die eine Stoßstelle 7 aufweist. Diese Stoßstelle 7 kann beispielsweise eine Schweißnaht sein, die in vorteilhafter Weise dadurch gebildet wird, daß die metallische Hülse aus einer Platte hergestellt ist, deren Enden zusammengeschweißt sind, so daß sich die Stoßstelle 7 ergibt.According to the invention, a metal sleeve is preferably used as a carrier sleeve 3, for example made of steel, which is expandable by air and which has a joint 7. This joint 7 may for example be a weld, which is advantageously formed by the fact that the metallic sleeve is made of a plate whose ends are welded together, so that the joint 7 results.

Die Trägerhülse 3 kann auch stoß- und spaltfrei ausgeführt sein, wobei dann also die in der Figur 1 gezeichnete Stoßstelle 7 entfällt. Bei einer metallischen derartigen Ausführung empfiehlt sich die Herstellung auf galvanischem Wege. Auch nichtmetallische Trägerhülsen 3 sind vorteilhaft stoß- und spaltfrei herstellbar.The carrier sleeve 3 can also be designed without impact and gap, in which case the joint 7 drawn in FIG. 1 is omitted. In a metallic such execution, the preparation is recommended by galvanic means. Non-metallic carrier sleeves 3 are advantageously produced without impact and gap.

Unter Stoßstelle wird insbesondere verstanden, daß eine hülsen- bzw. zylinderförmige Gummi- oder Kunststoffschicht oder ein hülsen- bzw. zylinderförmiger metallischer oder nichtmetallischer Träger in Umfangsrichtung nicht endlos, also nicht nahtfrei bzw. nicht kontinuierlich ist, d.h., daß in Längs- oder Achsrichtung eine Naht oder einen Stoß vorhanden ist. Die Stoßstelle kann aneinanderstoßende Schichten aufweisen. Sie kann sich auch als Spalt zwischen den Enden einer Schicht darstellen, der vorteilhaft mit einem Kleber oder vulkanisierbarem Material geschlossen wird.Under joint is understood in particular that a sleeve or cylindrical rubber or plastic layer or a sleeve or cylindrical metallic or non-metallic carrier in the circumferential direction is not endless, so not seamless or not continuous, ie, that in the longitudinal or axial direction a seam or a push is present. The joint may have abutting layers. It may also present itself as a gap between the ends of a layer, which is advantageously closed with an adhesive or vulcanizable material.

Des weiteren weist die kompressible Schicht 4 ebenfalls eine Stoßstelle 8 auf, die dadurch hergestellt sein kann, daß auf die Metallhülse 3 die kompressible Schicht 4 in Form eines Gummituchs aufgeklebt ist, so daß die Stoßstelle 8 durch die Enden der Gummischicht 4 gebildet sind.Furthermore, the compressible layer 4 also has a joint 8, which may be prepared by adhering to the metal shell 3 the compressible layer 4 in the form of a blanket, so that the joint 8 are formed by the ends of the rubber layer 4.

Ebenso kann, falls eine nicht dehnbare Schicht 5 auf der kompressiblen Schicht 4 verwendet wird, diese ebenfalls gemäß der Erfindung eine Stoßstelle 9 aufweisen, die in der vorbeschriebenen Weise gebildet sein kann.Also, if a non-stretchable layer 5 is used on the compressible layer 4, it may also according to the invention have a joint 9 which may be formed in the manner described above.

Des weiteren wird gemäß einem Ausführungsbeispiel auf einen derartigen Schichtaufbau, d. h. eine Trägerhülse 3 vorzugsweise aus Metall mit einer Stoßstelle 7 und mindestens einer aufgebrachten kompressiblen Schicht 4 mit einer Stoßstelle 8, eine Deckschicht 6 ohne Stoßstelle aufgebracht.Furthermore, according to one embodiment, such a layer structure, i. H. a carrier sleeve 3 preferably made of metal with a joint 7 and at least one applied compressible layer 4 with a joint 8, a cover layer 6 applied without joint.

Es ist auch möglich, daß die Deckschicht 6 - ebenso wie die kompressible Schicht 4 - Lufteinschlüsse aufweist, so daß auch die Deckschicht 6 eine gewisse Kompressibilität hat, was gegenüber dem Stand der Technik vorteilhaft ist und zu besseren Druckergebnissen bzw. Druckverhalten und besserer Bahnführung führen kann.It is also possible that the cover layer 6 - as well as the compressible layer 4 - air inclusions, so that the cover layer 6 has a certain compressibility, which is advantageous over the prior art and lead to better printing results and printing behavior and better web guide can.

Die erfindungsgemäße Hülse kann auch in der Weise besonders vorteilhaft hergestellt werden, daß eine geschweißte Metallhülse 3 aus Stahl oder Aluminium oder beispielsweise eine CFK-Hülse mit einer Stoßstelle verwendet wird, auf der ein herkömmliches Offset-Gummituch, z. B. mit einer kompressiblen Schicht, aufgebracht, beispielsweise aufgeklebt oder aufvulkanisiert wird oder ist. Danach wird die Deckschicht des herkömmlichen Gummituches abgetragen, beispielsweise abgeschliffen und an deren Stelle eine kontinuierliche, d. h. eine stoßfreie Deckschicht 6 aufgebracht, beispielsweise aufvulkanisiert. Gegenüber den bekannten Hülsen ist eine derartige Herstellung und ein derartiger Hülsenaufbau wesentlich preisgünstiger und weist eine Anzahl von Vorteilen auf. In diesem Fall liegen die Stoßstellen 8, 9 übereinander, da sie die Enden des herkömmlichen Gummituches, das auf die Trägerhülse 3 aufgeklebt wurde, darstellen.The sleeve according to the invention can also be made particularly advantageous in that a welded metal sleeve 3 made of steel or aluminum or for example a CFRP sleeve is used with a joint on which a conventional offset blanket, z. B. with a compressible layer applied, for example, is glued or vulcanized or is. Thereafter, the cover layer of the conventional blanket is removed, for example abraded and replaced by a continuous, d. H. a shock-free cover layer 6 applied, for example, vulcanized. Compared to the known sleeves such a production and such a sleeve construction is much cheaper and has a number of advantages. In this case, the joints 8, 9 are one above the other, as they represent the ends of the conventional blanket, which has been glued to the support sleeve 3.

Die Stoßstellen 8, 9 können in vorteilhafter Weise - müssen aber nicht zwingend - direkt über der Stoßstelle 7 angeordnet sein.The joints 8, 9 can advantageously - but not necessarily - be located directly above the joint 7.

Bei der Aufbringung von endlichen einzelnen Schichten, d. h. einer zumindest kompressiblen Schicht 4 und einer Deckschicht 6 sowie gegebenenfalls einer weiteren nicht dehnbaren Schicht, die im Ausführungsbeispiel mit 5 bezeichnet ist, können die einzelnen Stoßstellen 7, 8, 9 auch umfangsmäßig gesehen an anderen Stellen liegen, d. h. sie müssen nicht, wie dargestellt, übereinander liegen.In the application of finite individual layers, ie an at least compressible layer 4 and a cover layer 6 and optionally a further non-stretchable layer, which is designated in the embodiment with 5, the individual joints 7, 8, 9 are also circumferentially at other locations ie they do not have to lie one above the other as shown.

In der Schicht 5 ist beispielsweise die vorteilhafte Anordnung von kurzen, nicht dehnbaren Stücken, wie Fäden, gezeigt.In the layer 5, for example, the advantageous arrangement of short, non-stretchable pieces, such as threads, shown.

Die erfindungsgemäße Hülse 2 bietet eine Vielzahl von Einsatzmöglichkeiten, die nicht nur auf die Anwendung von Offset-Rollenrotationsdruckmaschinen beschränkt sind. So kann diese Hülse 2 auch beispielsweise bei anderen indirekten Druckverfahren, wie indirektem Tiefdruck, eingesetzt werden oder als Walze eingesetzt werden.The sleeve 2 of the invention offers a variety of uses, which are not limited to the use of offset web-fed rotary printing presses. Thus, this sleeve 2 can also be used for example in other indirect printing methods, such as indirect gravure printing, or used as a roller.

Es ist vorteilhaft, die Hülse 2 registergerecht aufzubringen. Dies kann beispielsweise dadurch erfolgen, daß die Hülse 2 in einer vorgegebenen Umfangsposition aufgeschoben wird.It is advantageous to apply the sleeve 2 in register. This can be done, for example, that the sleeve 2 is pushed in a predetermined circumferential position.

Beispielsweise kann eine Markierung an einem Hülsenende und einem Transferzylinderende vorhanden sein, die in Deckung gebracht, eine Registerung ermöglichen, d. h. die Hülse 2 in der Weise auf den Transferzylinder 1 aufschiebbar ist, daß den Stoßstellen 7, 8, 9 bzw. Spalten der Spannkanal 14 eines Plattenzylinders 15 im Abrollbereich mit diesem gegenüberliegt, wie in der Zeichnung gezeigt.For example, there may be a mark on a ferrule end and a transfer cylinder end that register, allowing registration, i. H. the sleeve 2 is pushed onto the transfer cylinder 1 in such a way that the joints 7, 8, 9 and columns of the clamping channel 14 of a plate cylinder 15 in the Abrollbereich with this opposite, as shown in the drawing.

Im Falle der beschriebenen Registerung kann sogar die Deckschicht 6 einen Stoß oder Spalt aufweisen, wie bei 16 angedeutet. Falls der Spalt 16 oder die Stöße oder Spalte relativ groß sind, können diese mit einem geeigneten Material, z.B. einem Kleber oder vulkanisierbarem Material, geschlossen werden.In the case of the registration described, even the cover layer 6 may have a shock or a gap, as indicated at 16. If the gap 16 or the bumps or gaps are relatively large, they may be coated with a suitable material, e.g. an adhesive or vulcanizable material.

Durch einen entsprechenden festen Sitz der Hülse 2, beispielsweise der Metallschicht 3 auf dem Transferzylinder 1, kann sichergestellt werden, daß die Hülse 2 in der Registerposition während des Betriebes fixiert bleibt.By a corresponding tight fit of the sleeve 2, for example, the metal layer 3 on the transfer cylinder 1, it can be ensured that the sleeve 2 remains fixed in the register position during operation.

Es ist alternativ auch möglich, mittels Formschlusses für eine Registerung zu sorgen, beispielsweise mittels einer an der Innenwandung der Metallhülse 3 befestigten Leiste 3a, die bei der Montage der Hülse 2 in einen axial verlaufenden Schlitz 17 des Transferzylinders 1 einschiebbar ist.Alternatively, it is also possible to provide positive locking by means of a positive fit, for example by means of a strip 3a fixed to the inner wall of the metal sleeve 3, which can be inserted into an axially extending slot 17 of the transfer cylinder 1 during assembly of the sleeve 2.

In der Figur 1 sind alle Schichten 3 bis 6 mit einer Stoßstelle 7, 8, 9, 16 oder einem Spalt versehen. Es kann auch nur bei einigen oder bei nur einer einzigen Schicht, beispielsweise bei der Deckschicht 6, eine Stoßstelle oder ein Spalt 16 vorhanden sein. Es entfallen dann also die Stoßstellen 7 bis 9. Im Falle des Vorhandenseins einer Stoßstelle 16 oder eines Spaltes in der äußeren Deckschicht 6 ist die Gummizylinderhülse 2 unbedingt registergerecht auf den Transferzylinder 1 aufzubringen, also derart, daß die Stoßstelle oder der Spalt 16 im Abrollbereich mit dem Plattenzylinder 15 dessen Spannkanal 14 gegenüber liegt.In FIG. 1, all layers 3 to 6 are provided with a joint 7, 8, 9, 16 or a gap. It may also be present only in some or in a single layer, for example in the cover layer 6, a joint or a gap 16. It therefore accounts for the joints 7 to 9. In the case of the presence of a joint 16 or a gap in the outer cover layer 6, the rubber cylinder sleeve 2 is necessarily register properly applied to the transfer cylinder 1, so such that the joint or the gap 16 in Abrollbereich with the plate cylinder 15 whose clamping channel 14 is opposite.

Eine besondere Ausführungsform der Erfindung besteht darin, nur die Außenschicht 6, also die das Druckbild aufnehmende Schicht, elastisch zu machen, das heißt vorzugsweise nur den unteren Bereich oder Teil mit z. B. Lufteinschlüssen oder evtl. nach unten offenen Luftkanälen auszubilden. Eine so ausgebildete Schicht, in der auch nicht dehnbare Materialien, z. B. Fäden oder Fadenstücke, angeordnet sein können, kann direkt auf einer Trägerhülse angeordnet sein.A particular embodiment of the invention is to make only the outer layer 6, so the print image receiving layer, elastic, that is preferably only the lower portion or part with z. As trapped air or possibly downwardly open air channels. Such a trained layer in which also non-stretchable materials, eg. As threads or pieces of thread can be arranged, can be arranged directly on a support sleeve.

Es ist auch möglich, die Schicht 3 aus faserverstärktem Hartgummi herzustellenmit oder ohne Naht oder Spalt - die z. B. durch Druckluft dehnbar ist, und hierüber kann eine kompressible Schicht, dann eine semikompressible Schicht, die faserverstärkt sein kann, und dann eine druckende Deckschicht angeordnet sein, was sehr vorteilhaft ist.It is also possible to make the layer 3 of fiber reinforced hard rubber with or without seam or gap - the z. B. can be stretched by compressed air, and this can be a compressible layer, then a semi-compressible layer, which may be fiber reinforced, and then a printing cover layer to be arranged, which is very beneficial.

Die in Figur 2 gezeigte Gummizylinderhülse 2.1 ähnelt im Schichtenaufbau der soeben beschriebenen Gummizylinderhülse gemäß Figur 1. Der Einfachheit halber werden deshalb für wiederkehrende oder ähnliche Elemente weitgehend die bisherigen Bezugszeichen beibehalten oder mit einem Zusatz ".1" versehen. Es kommt zunächst wiederum eine Trägerhülse 3 zur Anwendung, die eine Stoßstelle 7 aufweist. Die Trägerhülse 3 ist in diesem Falle aus einer Platte hergestellt, deren Enden zusammengeschweißt sind, so dass sich die Stoßstelle 7 ergibt. Die Trägerhülse 3 besteht vorteilhaft aus Stahl. Auf der Trägerhülse 3 sind eine kompressible Schicht 4, eine nicht dehnbare Schicht 5 und eine äußere Deckschicht 6 angeordnet. Diese Schichten 4, 5, 6 sind endlich, also nicht kontinuierlich, wobei zwischen ihren Enden jeweils ein Spalt bestehen bleibt. Die Spalte sind über der Stoßstelle 7 der Trägerhülse angeordnet und allesamt mit einem kompressiblen Material 18 ausgefüllt, so dass jede Schicht 4, 5, 6 eine von diesem kompressiblen Material 18 gebildete Stoßstelle 8.1, 9.1, 16.1 aufweist. Es ist auch möglich, dass die kompressible Schicht 4 und die nicht dehnbare Schicht 5 kontinuierlich ohne Stoßstelle ausgeführt sind und lediglich die Stoßstelle 16.1 in der äußeren Deckschicht 16 vorhanden ist. Es können auch noch weitere endliche oder endlose Schichten vorgesehen sein. Auch kann die Trägerhülse 3 kontinuierlich ausgeführt sein, beispielsweise als galvanisch hergestellte Nickelhülse.The rubber cylinder sleeve 2.1 shown in Figure 2 is similar in the layer structure of the rubber cylinder sleeve just described according to Figure 1. For the sake of simplicity, therefore, the previous reference numerals are largely retained or provided with an addition ".1" for recurring or similar elements. Again, a carrier sleeve 3 is used, which has a joint 7. The carrier sleeve 3 is made in this case of a plate whose ends are welded together, so that the joint 7 results. The carrier sleeve 3 is advantageously made of steel. On the support sleeve 3, a compressible layer 4, a non-stretchable layer 5 and an outer cover layer 6 are arranged. These layers 4, 5, 6 are finite, not so continuous, with a gap remaining between their ends. The gaps are located above the joint 7 of the carrier sleeve and are all filled with a compressible material 18 so that each layer 4, 5, 6 has a joint 8.1, 9.1, 16.1 formed by this compressible material 18. It is also possible that the compressible layer 4 and the non-stretchable layer 5 are continuously executed without joint and only the joint 16.1 in the outer cover layer 16 is present. There may also be provided further finite or endless layers. Also, the support sleeve 3 may be carried out continuously, for example, as an electroplated nickel sleeve.

Im Ausführungsbeispiel weisen der Transferzylinder 1, auf den die Gummizylinderhülse 2.1 aufschiebbar ist, sowie die Gummizylinderhülse 2.1 Hilfsmittel für eine Registerung auf. Im einzelnen handelt es sich um eine an der Innenwandung der Trägerhülse 3 befestigte Leiste 3a, die bei der Montage der Gummizylinderhülse 2.1 in einen axial verlaufenden Schlitz 17 des Transferzylinders 1 einschiebbar ist. Das Auf- und Abschieben der Gummizylinderhülse 2.1 ist nach deren elastischen Aufweitung mittels durch die Düsen 1a zugeführter Druckluft möglich. Die Breite b1 der Stoßstelle 16.1 ist etwa in der Größe der Breite b des Spannkanals 14 des mit dem Transferzylinder 1 zusammenarbeitenden Plattenzylinder 15 bemessen, praktisch also etwa 1 bis 3mm. Die Gummizylinderhülse 2.1 wird derart auf dem Transferzylinder 1 ins Register gebracht, dass deren Stoßstelle 16.1 in der Deckschicht 6 beim Abrollkontakt mit dem Plattenzylinder 15 gegenüber von dessen Spannkanal 14 zu liegen kommt. Statt dessen kann die Stoßstelle 16.1 auch mit einem druckfreien Bereich B (Fig. 3) des Druckbildes einer auf dem Plattenzylinder 15 gespannten Druckform zur Deckung gebracht werden. Hierfür bietet sich beispielsweise bei einer Druckmaschine mit vier stehenden Seiten in Umfangsrichtung (sogenannter doppelter Umfang) der Bereich gegenüber dem Spannkanal an. Durch derartige Registerungen der Stoßstelle 16.1 in der Deckschicht 6 wird vermieden, dass diese mit einem Verlust an Druckfläche zu Buche schlägt.In the exemplary embodiment, the transfer cylinder 1, to which the rubber cylinder sleeve 2.1 can be pushed, as well as the rubber cylinder sleeve 2.1 aids for registration. In detail, it is a mounted on the inner wall of the support sleeve 3 bar 3a, which is inserted in the assembly of the rubber cylinder sleeve 2.1 in an axially extending slot 17 of the transfer cylinder 1. The assembly and removal of the rubber cylinder sleeve 2.1 is possible after the elastic expansion by means of the nozzles 1a supplied compressed air. The width b1 of the joint 16.1 is dimensioned approximately in the size of the width b of the clamping channel 14 of the cooperating with the transfer cylinder 1 plate cylinder 15, so practically about 1 to 3mm. The rubber cylinder sleeve 2.1 is brought into registry on the transfer cylinder 1 such that its abutment 16.1 comes to lie in the cover layer 6 during rolling contact with the plate cylinder 15 with respect to its clamping channel 14. Instead, the joint 16.1 can also be brought to coincide with a pressure-free region B (FIG. 3) of the printed image of a printing form stretched on the plate cylinder 15. For this purpose, for example, in a printing machine with four stationary sides in the circumferential direction (so-called double circumference), the area opposite to the clamping channel. By such registrations of the joint 16.1 in the cover layer 6 is avoided that this suggests a loss of pressure surface to book.

Figur 3 zeigt eine Gummizylinderhülse 2.2, bei der lediglich die äußere Deckschicht 6 eine Stoßstelle 16.2 aufweist, während die kompressible Schicht 4 und die nicht dehnbare Schicht 5 ohne Stoßstelle, also endlos ausgeführt sind. Hier ist vorteilhaft die Deckschicht 6 als Platte auf die nicht dehnbare Schicht 5 gebracht, z. B. geklebt, deren die spätere Stoßstelle 16.2 bildenden Enden Luftblasen 10 enthalten und aneinander vulkanisiert sind. Auch die Trägerhülse 3 ist stoßfrei ausgeführt. Sie weist an ihrer Innenwandung wiederum eine Leiste 3a auf, die mit einem Schlitz 17 des Transferzylinders 1 derart zusammenarbeitet, dass die Stoßstelle 16.2 beim Abrollkontakt mit dem Plattenzylinder 15 mit dem druckfreien Bereich B des Druckbildes der Druckform 19 zusammenfällt.FIG. 3 shows a rubber cylinder sleeve 2.2, in which only the outer cover layer 6 has a joint 16.2, while the compressible layer 4 and the non-stretchable layer 5 without joint, so are endless. Here, advantageously, the cover layer 6 is brought as a plate on the non-stretchable layer 5, z. B. glued, the later joint 16.2 forming ends containing air bubbles 10 and are vulcanized to each other. The carrier sleeve 3 is designed bumpless. It has on its inner wall in turn on a bar 3a, which cooperates with a slot 17 of the transfer cylinder 1 such that the joint 16.2 coincides when rolling contact with the plate cylinder 15 with the pressure-free region B of the printed image of the printing plate 19.

Claims (10)

  1. A blanket cylinder sleeve (2.1, 2.2), particularly for offset printing machines, having an inner support sleeve (3) that may be expanded by air, at least one compressible layer (4) arranged over said support sleeve, and an outer cover layer (6), the cover layer (6) being constructed as a finite layer having a joint (16.1, 16.2) and the joint (16.1, 16.2) being filled with a compressible material (18).
  2. A blanket cylinder sleeve according to Claim 1, characterised in that the compressible layer (4) is not extendable and/or an non-extendable layer (5) is arranged over said compressible layer.
  3. A blanket cylinder sleeve according to Claim 1 or 2, characterised in that all layers (4, 5, 6) arranged on the support sleeve (3) are constructed to be finite with a respective joint (8.1, 9.1, 16.1), the joints (8.1, 9.1, 16.1) being located over one another and being filled with the compressible material (18).
  4. A blanket cylinder sleeve according to one of Claims 1 to 3, characterised in that the material (18) filling the joint contains air bubbles (10).
  5. A blanket cylinder sleeve according to one of Claims 1 to 3, characterised in that the ends of the cover layer (6) that form the joint (16.1) contain air bubbles (10) and are vulcanised to one another.
  6. A blanket cylinder sleeve according to one of the preceding claims, characterised in that the support sleeve (3) is constructed as a metal sleeve that has a joint (7) formed by a weld seam, the joint or joints (8.1, 9.1, 16.1) of the layers (4, 5, 6) located on the support sleeve (3) being arranged over the joint (7) of the support sleeve (3).
  7. A blanket cylinder sleeve according to one of the preceding claims, characterised in that the blanket cylinder sleeve (2.1) and a transfer cylinder (1) supporting this latter have register aids (3a, 17).
  8. A blanket cylinder sleeve according to one of Claims 1 to 7, in combination with a plate cylinder (15), characterised in that the joint (16.1) in the cover layer (6) comes to lie opposite the clamping channel (14) of the plate cylinder (15) when the blanket cylinder sleeve (2.1) is in rolling contact with the plate cylinder (15).
  9. A blanket cylinder sleeve according to Claim 8, characterised in that the joint (16.1) is approximately the same width (b) as the clamping channel (14).
  10. A blanket cylinder sleeve according to one of Claims 1 to 7, in combination with a plate cylinder (15), characterised in that the joint (16.2) in the cover layer (6) comes to lie opposite a print-free region B of the print image of a printing forme (19) clamped on the plate cylinder (15) when the blanket cylinder sleeve (2.1) is in rolling contact with the plate cylinder (15).
EP01112326A 2000-05-23 2001-05-19 Rubber sleeve, especially for rotary offset printing presses Expired - Lifetime EP1157855B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10025374 2000-05-23
DE10025374A DE10025374A1 (en) 2000-05-23 2000-05-23 Rubber cylinder sleeve, in particular for offset web-fed rotary printing machines

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EP1157855A1 EP1157855A1 (en) 2001-11-28
EP1157855B1 true EP1157855B1 (en) 2007-08-01

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EP (1) EP1157855B1 (en)
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Publication number Publication date
JP2002002145A (en) 2002-01-08
DE10025374A1 (en) 2001-11-29
US6484632B2 (en) 2002-11-26
DE50112779D1 (en) 2007-09-13
US20020002921A1 (en) 2002-01-10
JP3442372B2 (en) 2003-09-02
EP1157855A1 (en) 2001-11-28

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