EP1078777B1 - Rubber blanket sleeve for offset printing - Google Patents

Rubber blanket sleeve for offset printing Download PDF

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Publication number
EP1078777B1
EP1078777B1 EP00118538A EP00118538A EP1078777B1 EP 1078777 B1 EP1078777 B1 EP 1078777B1 EP 00118538 A EP00118538 A EP 00118538A EP 00118538 A EP00118538 A EP 00118538A EP 1078777 B1 EP1078777 B1 EP 1078777B1
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EP
European Patent Office
Prior art keywords
layer
elastomer layer
rubber
microporous
rubber blanket
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
EP00118538A
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German (de)
French (fr)
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EP1078777A2 (en
EP1078777A3 (en
Inventor
Joachim Herrmann
Stefan Füllgraf
Karl-Herwig Dr. Dommes
Jürgen Reissmann
Thomas Moldenhauer
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ContiTech Elastomer Beschichtungen GmbH
Original Assignee
ContiTech Elastomer Beschichtungen GmbH
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Publication of EP1078777A2 publication Critical patent/EP1078777A2/en
Publication of EP1078777A3 publication Critical patent/EP1078777A3/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
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—Intermediate layers
    • 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
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/909—Resilient layer, e.g. printer's blanket

Definitions

  • the invention relates to a blanket sleeve for a channelless Blanket cylinder of an offset printing machine.
  • Finite printing blankets are used in rotary printing presses Printing cylinders are clamped in such a way that a axially running clamping point arises, which is dead for the printing process Represents zone.
  • Blanket sleeves proposed that an axial clamping channel is not need.
  • a blanket sleeve is known, the one dimensionally stable carrier sleeve made of plastic or a metallic material has seamless cylindrical layers of elastic materials, are preferably constructed of rubber. It will therefore be a completely split and seamless blanket sleeve created axially over the blanket cylinder is pushed and fixed. Clamping a printing blanket is not necessary.
  • a gap-free rubber blanket sleeve which on a cylindrical carrier sleeve a seamlessly applied, cellular, compressible Has elastomer layer.
  • This cellular compressible layer is made by a surrounded in the circumferential direction not stretchable layer. It is on the very outside known elastomeric printing layer. Due to the non-stretchable layer the cellular, compressible layer is a kind of bandage. This bandage limits the deformation that occurs in the rolling contact during printing due to an increase in the shear stiffness of the compressible layer.
  • the circumferential direction of the non-stretchable layer is due to the preload the shear stiffness of the blanket sleeve while its placement below a shift of the outer printing layer in Circumferential direction, that is, a bead structure or a curvature effective in derogation.
  • the manufacture of the rubber blanket sleeve is not due to the application of the stretchy layer very expensive.
  • the compressibility of the blanket sleeve is influenced by the properties of the bandage. Because of not avoidable tolerance regarding the winding tension of the bandage there is insufficient consistency in the product properties. For a better print quality is a more uniform production of the To strive for blanket sleeve.
  • the invention has for its object a rubber sleeve of the beginning described type to create a good with less effort Print quality enables avoiding a bead build or Buckling during the rolling contact of the outer printing layer.
  • the compressible elastomer layer usually contains gas-filled cavities which, by compressing the enclosed gas, bring about the compressibility of the entire structure.
  • the number and size of the gas bubbles are set so that the compressibility is between 7% and 15% at a load of 100 N / cm 2 (test according to DIN 16 621). This is the relative compressibility, which represents the average decrease in thickness, based on the actual thickness, in%, for the load cycle defined by DIN standard 16 621.
  • the rubber matrix of the compressible layer i.e. the rubber mixture without considering the cavities in it, has a tension value of at least 2.2 N / mm 2 and at most 15 N / mm 2 at 100% elongation (test according to DIN 53 504).
  • the microporous contains Elastomer layer materials that increase strength. These materials are used at incorporated into the production of the compressible layer. By strength-increasing materials in the microporous elastomer layer The shear stiffness of this layer can be interpreted variably.
  • strength-increasing materials mixed in short fibers or embedded Fleeces are already in the manufacture of the rubber compound for the microporous layer mixed in.
  • the short fibers increase the Shear stiffness of the compressible layer over that known from elastomers Measure beyond.
  • the microporous layer is a woven fabric, a film or a knitted fabric appropriate.
  • This layer can be used as a support for during production the microporous layer act and at the same time with the interposition of a suitable adhesion promoter for a good connection to the metallic Provide carrier sleeve. This way the elaborate separation of microporous layer and receiving medium before the actual coating of the Carrier sleeve avoided.
  • the invention provides a blanket sleeve, which without an outer Bandage around the compressible layer gets along and still one ensures sufficient shear rigidity of the compressible layer.
  • the shear stiffness compressible layer further increased. It will also be the same time Material dampening increases, causing the rubber sleeve to vibrate it supporting blanket cylinder in the press can dampen well.
  • the blanket sleeve 11 shown in detail in FIG. 1 has one existing metallic support sleeve 12.
  • This Carrier sleeve 12 can consist of a steel sheet or nickel sheet.
  • this carrier sleeve 12 On this carrier sleeve 12 is a thin in a seamless cylindrical arrangement Layer of a rubber-metal coupling agent 13 applied, over the one microporous elastomer layer 14 is bound with closed pores.
  • the Adhesion promoter 13 is chosen so that it has optimal adhesion between the , Carrier sleeve 12 and the compressible layer 14 mediated. Typical values are between 2 N / mm and 5 N / mm separation strength, measured based on DIN 53 530.
  • the compressible layer 14 contains gas-filled cavities that pass through Compression of the enclosed gas the compressibility of the Effect blanket sleeve.
  • the number and size of the bubbles are so set that the compressibility in the range between 7% and 15%, measured in accordance with DIN 16 621.
  • the shear stiffness of the compressible layer is designed so that a stiffening bandage over it is not necessary.
  • the rubber matrix was selected so that its tension value at 100% elongation is greater than 2.2 N / mm 2 and less than 15 N / mm 2 .
  • this microporous elastomer layer 14 On the outer circumference of this microporous elastomer layer 14 is a thin one Layer 15 of adhesive rubber applied.
  • adhesive rubber typically Rubber solutions based on nitrile rubber are used.
  • Adhesive rubber layer 15 is the decisive one for the printing process Cover rubber layer 16 tied with a ground surface.
  • This Cover rubber layer 16 can have a thickness of approximately 0.3 mm.
  • the modified blanket sleeve 11 shown in detail in FIG. 2 has an additional, rubberized fabric layer 18 that between the carrier sleeve 12 and the microporous elastomer layer 14 is introduced.
  • the connection of the rubberized fabric layer 18 to the carrier sleeve 12 is by means of a thin Layer of a rubber-metal coupling agent 13 causes.
  • On the other outside The surface is the fabric layer 18 with a thin layer 19 of one suitable adhesive rubber covered for the connection of the microporous Elastomer layer 14 ensures.
  • the rubber blanket sleeve 11 shown in FIG. 3 differs from the two Embodiments described above in that the microporous Elastomer layer 14 contains reinforcing short fibers 21 which are within the Distribute the microporous elastomer layer 14 substantially uniformly. This increases the strength of the microporous elastomer layer 14 achieved. The shear stiffness is also higher than that of elastomers known measure increased.

Abstract

Rubber sleeve comprises a microporous, closed-pore compressible intermediate layer with specified mechanical parameters. The rubber sleeve for a printing cylinder of an offset printing machine comprises a stiff inner carrier sleeve (12) with an adhesive layer (13), a micro-porous compressible elastomer layer (14) with closed pores, a thin adhesive layer (15), and an outer rubber cover layer (16) serving as the printing layer. The compressibility of the elastomer layer (14) for a given stress, and the stress of its rubber matrix for a given strain are specified by their upper and lower permissible values. All the layers mentioned above are firmly joined to one another, and form a seamless cylindrical component.

Description

Die Erfindung betrifft eine Gummituchhülse für einen kanallosen Gummituchzylinder einer Offset-Druckmaschine.The invention relates to a blanket sleeve for a channelless Blanket cylinder of an offset printing machine.

In Rotationsdruckmaschinen finden endliche Drucktücher Verwendung, die auf Druckzylindern derart eingespannt werden, daß auf dem Zylinderumfang eine axial verlaufende Einspannstelle entsteht, die für den Druckvorgang eine tote Zone darstellt. Man hat daher bereits Gummituchzylinder mit kanallosen Gummituchhülsen vorgeschlagen, die einen axialen Einspannkanal nicht benötigen. Aus der DE 27 00 118 C2 ist eine Gummituchhülse bekannt, die eine formstabile Trägerhülse aus Kunststoff oder einem metallischen Werkstoff aufweist, auf der nahtlose zylindrische Lagen aus elastischen Materialien, vorzugsweise Gummi aufgebaut sind. Es wird somit eine vollständig spalt- und nahtfreie Gummituchhülse geschaffen, die axial über den Gummituchzylinder geschoben und fixiert wird. Ein Einspannen eines Drucktuches ist nicht notwendig.Finite printing blankets are used in rotary printing presses Printing cylinders are clamped in such a way that a axially running clamping point arises, which is dead for the printing process Represents zone. One therefore already has blanket cylinders with channelless ones Blanket sleeves proposed that an axial clamping channel is not need. From DE 27 00 118 C2 a blanket sleeve is known, the one dimensionally stable carrier sleeve made of plastic or a metallic material has seamless cylindrical layers of elastic materials, are preferably constructed of rubber. It will therefore be a completely split and seamless blanket sleeve created axially over the blanket cylinder is pushed and fixed. Clamping a printing blanket is not necessary.

Aus EP 0 452184 B1 ist es bekannt, eine Gummituchhülse mit einer Grundschicht aus zelligem Gummi mit einem weitgefaßten Druckelastizitätsmodulbereich zu versehen. Darauf ist außen eine harte Elastomerschicht aufgebracht, die mit Fasern verstärkt ist. Ganz außen liegt die übliche Deckgummischicht für den Druckvorgang.From EP 0 452184 B1 it is known to provide a rubber blanket sleeve with a Basic layer of cellular rubber with a broad To provide pressure elasticity module area. It's hard on the outside Elastomer layer applied, which is reinforced with fibers. The very outside is usual cover rubber layer for the printing process.

Aus EP 0 514 344 B1 ist eine spaltfreie Gummituchhülse bekannt, die auf einer zylindrischen Trägerhülse eine nahtlos aufgebrachte, zellige, komprimierbare Elastomerschicht aufweist. Diese zellige komprimierbare Schicht wird von einer in Umfangsrichtung nicht dehnbaren Schicht umgeben. Ganz außen liegt die an sich bekannte elastomere Druckschicht. Durch die nicht dehnbare Schicht erhält die zellige, komprimierbare Schicht eine Art Bandage. Diese Bandage begrenzt die beim Abrollkontakt während des Druckens auftretende Verformung aufgrund einer Erhöhung der Schubsteifigkeit der kompressiblen Schicht. Die in Umfangsrichtung nicht dehnbare Schicht stellt durch die ausgeübte Vorspannung die Schubsteifigkeit der Gummituchhülse ein, während ihre Anordnung unterhalb der äußeren druckenden Schicht eine Verschiebung derselben in Umfangsrichtung, also einen Wulstaufbau oder eine Wölbung wirksam unterbindet.From EP 0 514 344 B1 a gap-free rubber blanket sleeve is known, which on a cylindrical carrier sleeve a seamlessly applied, cellular, compressible Has elastomer layer. This cellular compressible layer is made by a surrounded in the circumferential direction not stretchable layer. It is on the very outside known elastomeric printing layer. Due to the non-stretchable layer the cellular, compressible layer is a kind of bandage. This bandage limits the deformation that occurs in the rolling contact during printing due to an increase in the shear stiffness of the compressible layer. In the The circumferential direction of the non-stretchable layer is due to the preload the shear stiffness of the blanket sleeve while its placement below a shift of the outer printing layer in Circumferential direction, that is, a bead structure or a curvature effective in derogation.

Die Herstellung der Gummituchhülse ist durch das Aufbringen der nicht dehnbaren Schicht sehr aufwendig. Die Kompressibilität der Gummituchhülse wird durch die Eigenschaften der Bandage beeinflußt. Aufgrund der nicht vermeidbaren Toleranz hinsichtlich der Wicklungsspannung der Bandage kann es zu einer ungenügenden Konstanz der Produkteigenschaften kommen. Für eine bessere Druckqualität ist aber eine gleichmäßigere Herstellung der Gummituchhülse anzustreben.The manufacture of the rubber blanket sleeve is not due to the application of the stretchy layer very expensive. The compressibility of the blanket sleeve is influenced by the properties of the bandage. Because of not avoidable tolerance regarding the winding tension of the bandage there is insufficient consistency in the product properties. For a better print quality is a more uniform production of the To strive for blanket sleeve.

Der Erfindung liegt die Aufgabe zugrunde, eine Gummituchhülse der eingangs beschriebenen Art zu schaffen, die mit geringerem Aufwand eine gute Druckqualität ermöglicht unter Vermeidung eines Wulstaufbaus oder einer Wölbung während des Abrollkontakts der äußeren druckenden Schicht.The invention has for its object a rubber sleeve of the beginning described type to create a good with less effort Print quality enables avoiding a bead build or Buckling during the rolling contact of the outer printing layer.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 aufgeführten Merkmale gelöst.The object is achieved by those listed in claim 1 Features solved.

Die kompressible Elastomerschicht enthält üblicherweise gasgefüllte Hohlräume, die durch Kompression des eingeschlossenen Gases die Kompressibilität des gesamten Aufbaus bewirken. Zahl und Größe der Gasblasen werden dabei so eingestellt, daß die Kompressibilität im Bereich zwischen 7 % und 15 % bei 100 N/cm2 Belastung liegt (Prüfung gemäß DIN 16 621). Dabei handelt es sich um die relative Zusammendrückbarkeit, die die mittlere Dickenabnahme, bezogen auf die Ist-Dicke angegeben in %, bei dem durch die DIN-Norm 16 621 definierten Belastungszyklus darstellt. Die Gummimatrix der kompressiblen Schicht, also die Gummimischung ohne Berücksichtigung der Hohlräume darin, weist einen Spannungswert von mindestens 2,2 N/mm2 und höchstens 15 N/mm2 bei 100 % Dehnung (Prüfung gemäß DIN 53 504).The compressible elastomer layer usually contains gas-filled cavities which, by compressing the enclosed gas, bring about the compressibility of the entire structure. The number and size of the gas bubbles are set so that the compressibility is between 7% and 15% at a load of 100 N / cm 2 (test according to DIN 16 621). This is the relative compressibility, which represents the average decrease in thickness, based on the actual thickness, in%, for the load cycle defined by DIN standard 16 621. The rubber matrix of the compressible layer, i.e. the rubber mixture without considering the cavities in it, has a tension value of at least 2.2 N / mm 2 and at most 15 N / mm 2 at 100% elongation (test according to DIN 53 504).

Überraschenderweise wurde festgestellt, daß auch ohne eine über der mikroporösen Schicht verlaufende versteifende Bandage eine ausreichende Schubsteifigkeit der kompressiblen Schicht erreicht wird.Surprisingly, it was found that even without one over the microporous layer extending stiffening bandage an adequate Shear stiffness of the compressible layer is achieved.

In vorteilhafter Ausgestaltung der Erfindung enthält die mikroporöse Elastomerschicht festigkeitssteigemde Materialien. Diese Materialien werden bei der Herstellung der kompressiblen Schicht eingearbeitet. Durch festigkeitssteigemde Materialien in der mikroporösen Elastomerschicht wird die Schubsteifigkeit dieser Schicht veränderlich auslegbar.In an advantageous embodiment of the invention, the microporous contains Elastomer layer materials that increase strength. These materials are used at incorporated into the production of the compressible layer. By strength-increasing materials in the microporous elastomer layer The shear stiffness of this layer can be interpreted variably.

In weiterer vorteilhafter Ausgestaltung der Erfindung sind die festigkeitssteigemden Materialien eingemischte Kurzfasem oder eingebettete Vliese. Die Kurzfasem werden bereits bei der Herstellung der Gummimischung für die mikroporöse Schicht mit eingemischt. Die Kurzfasern erhöhen die Schubsteifigkeit der kompressiblen Schicht über das von Elastomeren bekannte Maß hinaus.In a further advantageous embodiment of the invention strength-increasing materials mixed in short fibers or embedded Fleeces. The short fibers are already in the manufacture of the rubber compound for the microporous layer mixed in. The short fibers increase the Shear stiffness of the compressible layer over that known from elastomers Measure beyond.

In weiterer vorteilhafter Ausgestaltung der Erfindung sind die festigkeitssteigernden Materialien Gewebelagen oder Folien. Die mikroporöse Schicht wird damit verstärkt und ihre Schubsteifigkeit dadurch erhöht.In a further advantageous embodiment of the invention strength-increasing materials, fabric layers or foils. The microporous This strengthens the layer and increases its shear rigidity.

In weiterer vorteilhafter Ausgestaltung der Erfindung ist zwischen der Trägerhülse und der mikroporösen Schicht ein Gewebe, eine Folie oder ein Gewirke angebracht. Diese Schicht kann während der Fertigung als Aufnahmeträger für die mikroporöse Schicht wirken und gleichzeitig unter Zwischenschaltung eines geeigneten Haftvermittlers für eine gute Anbindung an die metallische Trägerhülse sorgen. Auf diese Weise wird das aufwendige Trennen von mikroporöser Schicht und Aufnahmeträger vor der eigentlichen Beschichtung der Trägerhülse vermieden. In a further advantageous embodiment of the invention is between the carrier sleeve and the microporous layer is a woven fabric, a film or a knitted fabric appropriate. This layer can be used as a support for during production the microporous layer act and at the same time with the interposition of a suitable adhesion promoter for a good connection to the metallic Provide carrier sleeve. This way the elaborate separation of microporous layer and receiving medium before the actual coating of the Carrier sleeve avoided.

Durch die Erfindung wird eine Gummituchhülse geschaffen, die ohne eine äußere Bandage um die kompressible Schicht auskommt und dennoch eine ausreichende Schubsteifigkeit der kompressiblen Schicht gewährleistet. Durch die weiteren Ausbildungen der Erfindung wird die Schubsteifigkeit der kompressiblen Schicht weiter erhöht. Auch wird gieichzeitig die Materialdämpfung erhöht, wodurch die Gummituchhülse Vibrationen des sie stützenden Gummituchzylinders in der Druckmaschine gut dämpfen kann.The invention provides a blanket sleeve, which without an outer Bandage around the compressible layer gets along and still one ensures sufficient shear rigidity of the compressible layer. By the further developments of the invention, the shear stiffness compressible layer further increased. It will also be the same time Material dampening increases, causing the rubber sleeve to vibrate it supporting blanket cylinder in the press can dampen well.

Anhand der Zeichnung werden nachstehend drei Ausführungsbeispiele der Erfindung näher erläutert. Es zeigt

Fig. 1
im Detailschnitt den Aufbau einer Gummituchhülse,
Fig. 2
eine modifizierte Gummituchhülse, die zwischen der kompressiblen Schicht und der Trägerhülse ein Gewebe aufweist,
Fig. 3
eine modifizierte Gummituchhülse deren kompressible mikroporöse Schicht eingemischte Kurzfasem enthält.
Three exemplary embodiments of the invention are explained in more detail below with the aid of the drawing. It shows
Fig. 1
in detail section the construction of a blanket sleeve,
Fig. 2
a modified rubber blanket sleeve which has a fabric between the compressible layer and the carrier sleeve,
Fig. 3
a modified blanket sleeve whose compressible microporous layer contains mixed short fibers.

Die in Fig. 1 ausschnittsweise gezeigte Gummituchhülse 11 weist eine aus metallischem Werkstoff bestehende zylindrische Trägerhülse 12 auf. Diese Trägerhülse 12 kann aus einem Stahlblech oder Nickelblech bestehen.The blanket sleeve 11 shown in detail in FIG. 1 has one existing metallic support sleeve 12. This Carrier sleeve 12 can consist of a steel sheet or nickel sheet.

Auf dieser Trägerhülse 12 ist in nahtloser zylindrischer Anordnung eine dünne Schicht eines Gummi-Metall-Haftvermittlers 13 aufgebracht, über die eine mikroporöse Elastomerschicht 14 mit geschlossenen Poren angebunden ist. Der Haftvermittler 13 wird so gewählt, daß er eine optimale Haftung zwischen der . Trägerhülse 12 und der kompressiblen Schicht 14 vermittelt. Typische Werte liegen zwischen 2 N/mm und 5 N/mm Trennfestigkeit, gemessen in Anlehnung an DIN 53 530.On this carrier sleeve 12 is a thin in a seamless cylindrical arrangement Layer of a rubber-metal coupling agent 13 applied, over the one microporous elastomer layer 14 is bound with closed pores. The Adhesion promoter 13 is chosen so that it has optimal adhesion between the , Carrier sleeve 12 and the compressible layer 14 mediated. Typical values are between 2 N / mm and 5 N / mm separation strength, measured based on DIN 53 530.

Die kompressible Schicht 14 enthält gasgefüllte Hohlräume, die durch Kompression des eingeschlossenen Gases die Kompressibilität der Gummituchhülse bewirken. Zahl und Größe der Blasen werden dabei so eingestellt, daß die Kompressibilität im Bereich zwischen 7 % und 15 %, gemessen in Anlehnung an DIN 16 621, liegt.The compressible layer 14 contains gas-filled cavities that pass through Compression of the enclosed gas the compressibility of the Effect blanket sleeve. The number and size of the bubbles are so set that the compressibility in the range between 7% and 15%, measured in accordance with DIN 16 621.

Weiter ist die Schubsteifigkeit der kompressiblen Schicht so ausgelegt, daß eine versteifende Bandage darüber nicht erforderlich ist. Dabei ist die Gummimatrix so ausgewählt worden, daß ihr Spannungswert bei 100 % Dehnung größer als 2,2 N/mm2 und kleiner als 15 N/mm2 ist.Furthermore, the shear stiffness of the compressible layer is designed so that a stiffening bandage over it is not necessary. The rubber matrix was selected so that its tension value at 100% elongation is greater than 2.2 N / mm 2 and less than 15 N / mm 2 .

Auf dem Außenumfang dieser mikroporösen Elastomerschicht 14 ist eine dünne Schicht 15 aus Haftgummi aufgebracht. Hier werden typischerweise Gummilösungen auf Nitril-Kautschukbasis eingesetzt. Durch diese Haftgummischicht 15 ist die für den Druckvorgang entscheidende Deckgummischicht 16 mit geschliffener Oberfläche angebunden. Diese Deckgummischicht 16 kann eine Dicke von ca. 0,3 mm aufweisen.On the outer circumference of this microporous elastomer layer 14 is a thin one Layer 15 of adhesive rubber applied. Here are typically Rubber solutions based on nitrile rubber are used. Through this Adhesive rubber layer 15 is the decisive one for the printing process Cover rubber layer 16 tied with a ground surface. This Cover rubber layer 16 can have a thickness of approximately 0.3 mm.

Die in Fig. 2 ausschnittsweise gezeigte modifizierte Gummituchhülse 11 weist eine zusätzliche, gummierte Gewebelage 18 auf, die zwischen der Trägerhülse 12 und der mikroporösen Elastomerschicht 14 eingebracht ist. Die Anbindung der gummierten Gewebelage 18 an die Trägerhülse 12 wird mittels einer dünnen Schicht eines Gummi-Metall-Haftvermittlers 13 bewirkt. Auf der anderen äußeren Oberfläche ist die Gewebelage 18 mit einer dünnen Schicht 19 aus einem geeigneten Haftgummi bedeckt, die für die Anbindung der mikroporösen Elastomerschicht 14 sorgt.The modified blanket sleeve 11 shown in detail in FIG. 2 has an additional, rubberized fabric layer 18 that between the carrier sleeve 12 and the microporous elastomer layer 14 is introduced. The connection of the rubberized fabric layer 18 to the carrier sleeve 12 is by means of a thin Layer of a rubber-metal coupling agent 13 causes. On the other outside The surface is the fabric layer 18 with a thin layer 19 of one suitable adhesive rubber covered for the connection of the microporous Elastomer layer 14 ensures.

Die Gummituchhülse 11 gemäß Fig. 3 unterscheidet sich von den beiden vorstehend beschriebenen Ausführungsformen dadurch, daß die mikroporöse Elastomerschicht 14 verstärkende Kurzfasern 21 enthält, die sich innerhalb der mikroporösen Elastomerschicht 14 im wesentlichen gleichmäßig verteilen. Dadurch wird eine Festigkeitssteigerung der mikroporösen Elastomerschicht 14 erzielt. Auch wird die Schubsteifigkeit dadurch über das von Elastomeren bekannte Maß hinaus erhöht.The rubber blanket sleeve 11 shown in FIG. 3 differs from the two Embodiments described above in that the microporous Elastomer layer 14 contains reinforcing short fibers 21 which are within the Distribute the microporous elastomer layer 14 substantially uniformly. This increases the strength of the microporous elastomer layer 14 achieved. The shear stiffness is also higher than that of elastomers known measure increased.

Claims (5)

  1. Rubber blanket sleeve (11) for a channel-free rubber blanket cylinder of an offset printing machine, having the following features:
    an inner, dimensionally stable support sleeve (12) as a supporting layer,
    a thin layer (13) of bonding agent applied thereto,
    to which a microporous compressible elastomer layer (14), which contains closed pores, is applied,
    the compressibility of the elastomer layer (14) is in the range between 7% and 15% with a load of 100 N/cm2 (Test in accordance with DIN 16 621),
    the rubber matrix of the compressible elastomer layer (14) has a tensile stress greater than 2.2 N/mm2 and less than 15 N/mm2 at 100% elongation (Test in accordance with DIN 53 504),
    a thin layer (15) of a bonding agent applied to the elastomer layer (14),
    an outer covering rubber layer (16) as a printing layer,
    all the layers form seamless, cylindrical bodies and are securely connected to one another.
  2. Rubber blanket sleeve according to claim 1, characterised in that the microporous elastomer layer (14) contains reinforcing materials.
  3. Rubber blanket sleeve according to claim 2, characterised in that the microporous elastomer layer (14) contains short fibres (21) which are mixed into it.
  4. Rubber blanket sleeve according to claim 2, characterised in that the microporous elastomer layer (14) contains woven fabric layers or foils.
  5. Rubber blanket sleeve according to claim 1, characterised in that a woven fabric, a foil or a knitted fabric (18) is applied between the support sleeve (12) and the microporous elastomer layer (14).
EP00118538A 1999-08-26 2000-08-25 Rubber blanket sleeve for offset printing Expired - Lifetime EP1078777B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940429A DE19940429A1 (en) 1999-08-26 1999-08-26 Blanket sleeve for an offset printing machine
DE19940429 1999-08-26

Publications (3)

Publication Number Publication Date
EP1078777A2 EP1078777A2 (en) 2001-02-28
EP1078777A3 EP1078777A3 (en) 2001-03-14
EP1078777B1 true EP1078777B1 (en) 2004-03-03

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ID=7919640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00118538A Expired - Lifetime EP1078777B1 (en) 1999-08-26 2000-08-25 Rubber blanket sleeve for offset printing

Country Status (4)

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US (1) US6382102B1 (en)
EP (1) EP1078777B1 (en)
AT (1) ATE260774T1 (en)
DE (2) DE19940429A1 (en)

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DE19918432A1 (en) * 1999-04-23 2000-10-26 Saueressig Gmbh & Co Expansion layer of compressible material between core cylinder and its sleeve is provided with depressions on its outer or inner circumferential surface
US20110045267A1 (en) * 1999-10-13 2011-02-24 Hatec Produktions- und Handels- gesellschaft mbH Substructure material for a printing device and printer's blanket for the printing of uneven materials to be printed
US6389965B1 (en) * 1999-12-21 2002-05-21 Heidelberger Druckmaschinen Ag Tubular printing blanket with tubular isotropic reinforcing layer
US6871591B2 (en) * 2001-07-10 2005-03-29 Reeves Brothers, Inc. Spray coating method of producing printing blankets
US7011021B2 (en) * 2001-09-10 2006-03-14 Day International, Inc. Printing blanket sleeve with replaceable printing surface
US6703095B2 (en) * 2002-02-19 2004-03-09 Day International, Inc. Thin-walled reinforced sleeve with integral compressible layer
AU2003211400A1 (en) * 2003-02-27 2004-09-17 Kinyosha Co., Ltd. Rubber blanket for printing
ATE320923T1 (en) 2003-10-21 2006-04-15 Koenig & Bauer Ag ELEVATORS ON A ROLLER AND PRINTING UNITS OF A PRINTING MACHINE WITH THE ROLLER
EP2207684B1 (en) * 2007-10-19 2011-11-23 KHS GmbH Apparatus for printing bottles or similar containers on the outer container surface
EP2070716B1 (en) 2007-12-10 2013-08-21 Folex Coating GmbH Method for mounting a rubber blanket in offset printing
US20100307356A1 (en) * 2008-02-04 2010-12-09 Felice Rossini Bridged sleeve/cylinder and method of making same for web offset printing machines
US20130055913A1 (en) * 2010-05-07 2013-03-07 Ingvar Andersson Plate cylinder
CN101905562A (en) * 2010-08-05 2010-12-08 广东宏陶陶瓷有限公司 Special offset printing roller for gravure printing of ceramic tile and application thereof
US10647108B2 (en) * 2018-04-02 2020-05-12 Canon Kabushiki Kaisha Image recording apparatus
WO2023084547A1 (en) * 2021-11-12 2023-05-19 Roberto Levi Acobas Coating for a blanket cylinder of a printing machine

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IN146438B (en) 1976-01-08 1979-06-02 Strachan & Henshaw Ltd
US4303721A (en) * 1979-07-20 1981-12-01 W. R. Grace & Co. Closed cell foam printing blanket
FR2660895B1 (en) 1990-04-12 1994-10-28 Rollin Sa CYLINDER COATED WITH A PRINTING BLANKET.
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US5364683A (en) * 1992-02-14 1994-11-15 Reeves Brothers, Inc. Compressible printing blanket and method of making same
JP2747198B2 (en) * 1993-06-07 1998-05-06 住友ゴム工業株式会社 Offset blanket for printing
US5860360A (en) * 1996-12-04 1999-01-19 Day International, Inc. Replaceable printing sleeve
JP2938403B2 (en) * 1996-12-13 1999-08-23 住友ゴム工業株式会社 Printing blanket

Also Published As

Publication number Publication date
US6382102B1 (en) 2002-05-07
EP1078777A2 (en) 2001-02-28
EP1078777A3 (en) 2001-03-14
ATE260774T1 (en) 2004-03-15
DE19940429A1 (en) 2001-03-08
DE50005488D1 (en) 2004-04-08

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