EP1208997A1 - Blanket for offset printing - Google Patents

Blanket for offset printing Download PDF

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Publication number
EP1208997A1
EP1208997A1 EP00125775A EP00125775A EP1208997A1 EP 1208997 A1 EP1208997 A1 EP 1208997A1 EP 00125775 A EP00125775 A EP 00125775A EP 00125775 A EP00125775 A EP 00125775A EP 1208997 A1 EP1208997 A1 EP 1208997A1
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EP
European Patent Office
Prior art keywords
layer
printing
printing blanket
thickness
intermediate layer
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.)
Granted
Application number
EP00125775A
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German (de)
French (fr)
Other versions
EP1208997B1 (en
Inventor
Joachim Herrmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Elastomer Beschichtungen GmbH
Original Assignee
ContiTech Elastomer Beschichtungen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ContiTech Elastomer Beschichtungen GmbH filed Critical ContiTech Elastomer Beschichtungen GmbH
Priority to DE50010411T priority Critical patent/DE50010411D1/en
Priority to AT00125775T priority patent/ATE296207T1/en
Priority to EP00125775A priority patent/EP1208997B1/en
Priority to JP2001351114A priority patent/JP2002166678A/en
Priority to US09/992,014 priority patent/US20020062753A1/en
Publication of EP1208997A1 publication Critical patent/EP1208997A1/en
Application granted granted Critical
Publication of EP1208997B1 publication Critical patent/EP1208997B1/en
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • 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
    • B41N2210/06—Backcoats; Back layers; Bottom 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

Definitions

  • the invention relates to a printing blanket for offset printing applications, preferably for use in the printing of surface textured and especially printing materials at risk of deformation according to the generic term of claim 1.
  • Printing blankets have always been special applications in the past been adjusted. Difficulties always arise when on the printing blanket acting reaction force from the printing cylinder in Time course is not steady, which is regular when printing structured Printing material is the case. There are also printing materials such as Cardboard, corrugated cardboard or the like, in connection with which Printing process forces occur which lead to changes in the shape of these printing materials lead, whereby the printing result, for example with regard to a register pressure over the entire area is negatively affected.
  • DE 30 27 549 A1 describes a printing blanket made of an elastic, compressible pressure element with closed-cell foam described.
  • the construction of such a blanket makes it suitable for Recognize lithographic printing, however, it is for printing applications of structured surfaces cannot be used if high quality requirements are to be fulfilled.
  • the invention has for its object a blanket for offset printing to provide with the special use cases with regard to the selection of the relevant printing material can be accessed.
  • the object is achieved in that with a printing blanket according to the preamble of claim 1, the compressible intermediate layer as Elastomer layer or thermoplastic elastomer layer is formed, the directly using an adhesion promoter or using a Compensating layer is connected to the outer layer, its thickness in comparison to the compressible intermediate layer is low, the elasticity of the Outer layer and the compression behavior of the compressible Intermediate layer are chosen such that the Printing blanket force to deform the composite of compressible Intermediate layer and outer layer leads to a full-surface Place the printing blanket on the printing material as well as a uniform one Distribution of local pressure is reached.
  • the invention is associated with the advantage that as a result of a comparatively highly elastic deformable outer layer and one during the Printing process in the compressed state resilient Intermediate layer the relevant surface areas of the printing blanket with the Printing material come into defined, large-area contact without that Exposing media to forces that cause non-reversible deformation of the printing material would lead. Local bumps of the If at all, the printing material leads to only slight differences in the Printing pressure. This ensures an even print result.
  • the parameters of the vzw. closed porous trained intermediate layer - such as thickness of the layer, pore content and Pore size - selected so that when exposed to a test pressure of 1350 kPa a reduction in thickness of 20 - 50% of the initial thickness of the printing blanket is achieved.
  • the thickness of the printing blanket can be selected to be greater than 2.0 mm. Lies the thickness of the printing blanket in the range of 2.5 - 3.0 mm are particularly good Print results achievable.
  • corrugated cardboard is the proportion of pores in the compressible intermediate layer chosen such that under the action of a Test pressure of 1350 kPa a reduction in the thickness of the printing blanket 0.45 - 0.90 mm. Another improvement in print quality is achievable with a pore content in the intermediate layer, that with a test pressure of 1350 kPa to reduce the thickness of the printing blanket by 0.55 - 0.70 mm leads.
  • NBR mixtures for the compressible intermediate layer, NBR mixtures, polyurethanes or other elastomers are used.
  • the base layer of the printing blanket advantageously contains one Reinforcements made of cotton.
  • the strength members are preferred can also consist of other materials, in the form of two layers of fabric brought in.
  • the thickness of the compressible Intermediate layer 1 - 2 mm.
  • the ratio of the thickness of the outer layer to the thickness the compressible intermediate layer can be 1: 2.5 to 1: 7.
  • the outer layer has deformation-prone printing materials expediently a Shore hardness less than 55 ShA.
  • a fabric with high elongation can be placed in the compensation layer be stored, the expansion vzw. greater than 7% with a load of Is 500N / 5cm.
  • FIG. 1 shows a printing blanket for printing corrugated cardboard and the like Printing materials in the cut, whereby the layer structure of the printing blanket becomes recognizable.
  • the printing blanket essentially consists of a base layer 1, one compressible intermediate layer 2 and one facing the printing material Cover rubber layer 3.
  • a reinforcement 4 in shape a two-ply cotton fabric. However, it can also other reinforcements such as foils, sheets and fabrics from others Materials and knitted fabrics form part of the base layer 1.
  • compressible intermediate layer 2 which contains gaseous, self-contained pores 5 which are sufficiently high Ensure the compressibility of the intermediate layer 2.
  • the intermediate layer 2 with the Cover rubber layer 3 connected Via an adhesive rubber 6 and / or a compensation layer 7, in which one Fabric layer can be stored, the intermediate layer 2 with the Cover rubber layer 3 connected, which has only a small thickness and high elasticity has, so that the surface of the profile of the printing material at Can adjust the printing process sufficiently well.

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  • Printing Plates And Materials Therefor (AREA)

Abstract

An offset printing blanket is used in the reproduction of surface structures liable to damage under cylinder pressure. The blanket has a base layer (1) in contact with the print cylinder, an intermediate compressible layer (2) incorporating fine gas pores (5), and an outer layer (3) in contact with the print web. Under compression during the print run the compressible (2) and contact layers (3) spread to cover and effect uniform pressure on the print web surface. The compressible layer has closed pores. Under a calibration pressure of 1350 kPa the compressible layer reduces in thickness by 20-50 per cent i.e. 0.45 to 0.9 mm. The printing blanket is pref. 2.5 to 3.0 mm thick. The compressible layer is 1-2 mm thick. The ratio of outer layer to intermediate layer thickness is in the range 1: 2.5 to 1:7. The outer layer has a Shore hardness of 55 ShA. The compensation layer (7) incorporates a fabric with stretch factor of more than 7 per cent under a load of 500N/5cm.

Description

Die Erfindung betrifft ein Drucktuch für Offset-Druck-Anwendungen, vorzugsweise für den Einsatz zum Bedrucken von oberflächenstrukturierten und insbesondere deformationsgefährdeten Bedruckmaterialien gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a printing blanket for offset printing applications, preferably for use in the printing of surface textured and especially printing materials at risk of deformation according to the generic term of claim 1.

Drucktücher sind in der Vergangenheit immer wieder speziellen Einsatzfällen angepasst worden. Schwierigkeiten dabei entstehen immer dann, wenn die auf das Drucktuch wirkende, vom Druckzylinder ausgehende Reaktionskraft im Zeitverlauf nicht stetig ist, was regelmäßig beim Bedrucken von strukturiertem Bedruckmaterial der Fall ist. Des Weiteren existieren Bedruckmaterialien wie Kartonagen, Wellpappe oder dergleichen, bei denen im Zusammenhang mit dem Druckvorgang Kräfte auftreten, die zu Formänderungen dieser Bedruckmaterialien führen, wodurch das Druckergebnis beispielsweise hinsichtlich eines registerhaltigen Druckes über die gesamte Fläche negativ beeinflusst wird.Printing blankets have always been special applications in the past been adjusted. Difficulties always arise when on the printing blanket acting reaction force from the printing cylinder in Time course is not steady, which is regular when printing structured Printing material is the case. There are also printing materials such as Cardboard, corrugated cardboard or the like, in connection with which Printing process forces occur which lead to changes in the shape of these printing materials lead, whereby the printing result, for example with regard to a register pressure over the entire area is negatively affected.

In der DE 30 27 549 A1 ist ein Drucktuch aus einem elastischen, zusammendrückbaren Druckelement mit geschlossenzelligem Schaum beschrieben. Der Aufbau eines solchen Drucktuches läßt eine Eignung für den Lithographiedruck erkennen, dagegen ist es für Anwendungen zum Bedrucken von strukturierten Oberflächen nicht einsetzbar, wenn hohe Qualitätsanforderungen zu erfüllen sind.DE 30 27 549 A1 describes a printing blanket made of an elastic, compressible pressure element with closed-cell foam described. The construction of such a blanket makes it suitable for Recognize lithographic printing, however, it is for printing applications of structured surfaces cannot be used if high quality requirements are to be fulfilled.

Der Erfindung liegt die Aufgabe zugrunde, ein Drucktuch für den Offsetdruck bereitzustellen, mit dem spezielle Anwendungsfälle hinsichtlich der Auswahl des betreffenden Bedruckmaterials erschlossen werden. The invention has for its object a blanket for offset printing to provide with the special use cases with regard to the selection of the relevant printing material can be accessed.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass bei einem Drucktuch gemäß Oberbegriff des Patentanspruchs 1 die kompressible Zwischenschicht als Elastomerschicht oder thermoplastische Elastomerschicht ausgebildet ist, die direkt unter Verwendung eines Haftvermittlers oder unter Einsatz einer Ausgleichsschicht mit der Außenschicht verbunden ist, deren Dicke im Vergleich zur kompressiblen Zwischenschicht gering ist, wobei die Elastizität der Außenschicht und das Kompressionsverhalten der kompressiblen Zwischenschicht derart gewählt sind, dass die beim Druckvorgang auf das Drucktuch wirkende Kraft zu einer Verformung des Verbundes aus kompressibler Zwischenschicht und Außenschicht dahingehend führt, dass eine vollflächige Auflage des Drucktuches auf dem Bedruckmaterial sowie eine gleichförmige Verteilung des lokalen Druckes erreicht wird.According to the invention the object is achieved in that with a printing blanket according to the preamble of claim 1, the compressible intermediate layer as Elastomer layer or thermoplastic elastomer layer is formed, the directly using an adhesion promoter or using a Compensating layer is connected to the outer layer, its thickness in comparison to the compressible intermediate layer is low, the elasticity of the Outer layer and the compression behavior of the compressible Intermediate layer are chosen such that the Printing blanket force to deform the composite of compressible Intermediate layer and outer layer leads to a full-surface Place the printing blanket on the printing material as well as a uniform one Distribution of local pressure is reached.

Die Erfindung ist mit dem Vorteil verbunden, dass infolge einer vergleichsweise stark elastisch verformbaren Außenschicht und einer während des Druckvorganges im komprimierten Zustand elastisch nachgiebigen Zwischenschicht die relevanten Oberflächenbereiche des Drucktuches mit dem Bedruckmaterial in definierten, großflächigen Kontakt kommen, ohne das Bedruckmaterial Kräften auszusetzen, die zu einer nicht reversiblen Deformation des Bedruckmaterials führen würden. Lokale Unebenheiten des Bedruckmaterials führen, wenn überhaupt, nur zu geringen Unterschieden in der Druckpressung. Damit wird ein gleichmäßiges Druckergebnis gewährleistet.The invention is associated with the advantage that as a result of a comparatively highly elastic deformable outer layer and one during the Printing process in the compressed state resilient Intermediate layer the relevant surface areas of the printing blanket with the Printing material come into defined, large-area contact without that Exposing media to forces that cause non-reversible deformation of the printing material would lead. Local bumps of the If at all, the printing material leads to only slight differences in the Printing pressure. This ensures an even print result.

In Ausgestaltung der Erfindung sind die Parameter der vzw. geschlossenporig ausgebildeten Zwischenschicht - wie Dicke der Schicht, Porenanteil und Porengröße - derart gewählt, dass bei Einwirkung eines Prüfdruckes von 1350 kPa eine Dickenreduzierung von 20 ― 50 % der Ausgangsdicke des Drucktuches erreicht wird. Mit einer solchen Zwischenschicht wird die Voraussetzung für eine elastische Anpassung der Außenschicht an das Profil des Bedruckmaterials geschaffen.In an embodiment of the invention, the parameters of the vzw. closed porous trained intermediate layer - such as thickness of the layer, pore content and Pore size - selected so that when exposed to a test pressure of 1350 kPa a reduction in thickness of 20 - 50% of the initial thickness of the printing blanket is achieved. With such an intermediate layer, the prerequisite for one elastic adjustment of the outer layer to the profile of the printing material created.

Dabei kann die Dicke des Drucktuches größer als 2,0 mm gewählt werden. Liegt die Dicke des Drucktuches im Bereich von 2,5 ― 3,0 mm, sind besonders gute Druckergebnisse erzielbar. The thickness of the printing blanket can be selected to be greater than 2.0 mm. Lies the thickness of the printing blanket in the range of 2.5 - 3.0 mm are particularly good Print results achievable.

Für einen Einsatz des Drucktuches zum Bedrucken von Materialien wie etwa Wellpappe ist in weiterer Ausgestaltung der Erfindung der Porenanteil der kompressiblen Zwischenschicht derart gewählt, dass unter Einwirkung eines Prüfdruckes von 1350 kPa eine Reduzierung der Dicke des Drucktuches um 0,45 ― 0,90 mm erfolgt. Eine weitere Verbesserung der Druckqualität ist erreichbar bei einem Porenanteil in der Zwischenschicht, der bei einem Prüfdruck von 1350 kPa zu einer Verringerung der Dicke des Drucktuches um 0,55 ― 0,70 mm führt.For use of the printing blanket for printing on materials such as In a further embodiment of the invention, corrugated cardboard is the proportion of pores in the compressible intermediate layer chosen such that under the action of a Test pressure of 1350 kPa a reduction in the thickness of the printing blanket 0.45 - 0.90 mm. Another improvement in print quality is achievable with a pore content in the intermediate layer, that with a test pressure of 1350 kPa to reduce the thickness of the printing blanket by 0.55 - 0.70 mm leads.

Für die kompressible Zwischenschicht können NBR-Mischungen, Polyurethane oder andere Elastomere zum Einsatz gelangen.For the compressible intermediate layer, NBR mixtures, polyurethanes or other elastomers are used.

Die Basisschicht des Drucktuchs enthält zweckmäßigerweise einen Festigkeitsträger aus Baumwolle. Bevorzugt werden die Festigkeitsträger, die auch aus anderen Materialien bestehen können, in Form von zwei Gewebelagen eingebracht.The base layer of the printing blanket advantageously contains one Reinforcements made of cotton. The strength members are preferred can also consist of other materials, in the form of two layers of fabric brought in.

In weiterer Ausgestaltung der Erfindung beträgt die Dicke der kompressiblen Zwischenschicht 1 ― 2 mm. Das Verhältnis der Dicke der Außenschicht zur Dicke der kompressiblen Zwischenschicht kann 1 : 2,5 bis 1 : 7 betragen.In a further embodiment of the invention, the thickness of the compressible Intermediate layer 1 - 2 mm. The ratio of the thickness of the outer layer to the thickness the compressible intermediate layer can be 1: 2.5 to 1: 7.

Zur Erzielung hochwertiger Druckergebnisse, insbesondere beim Bedrucken deformationsgefährdeter Bedruckmäterialien weist die Außenschicht zweckmäßig eine Shore-Härte kleiner als 55 ShA auf.To achieve high quality printing results, especially when printing The outer layer has deformation-prone printing materials expediently a Shore hardness less than 55 ShA.

Weiterhin kann in die Ausgleichsschicht ein Gewebe mit hoher Dehnung eingelagert sein, wobei die Dehnung vzw. größer als 7% bei einer Belastung von 500N/5cm ist. Furthermore, a fabric with high elongation can be placed in the compensation layer be stored, the expansion vzw. greater than 7% with a load of Is 500N / 5cm.

Die Erfindung soll nachfolgend anhand eines Ausführungsbeispiels näher erläutert werden.The invention will be described in more detail below using an exemplary embodiment are explained.

Es zeigt die Fig. 1 ein Drucktuch zum Bedrucken von Wellpappe und ähnlichen Bedruckmaterialien im Schnitt, wodurch der Schichtaufbau des Drucktuches erkennbar wird.1 shows a printing blanket for printing corrugated cardboard and the like Printing materials in the cut, whereby the layer structure of the printing blanket becomes recognizable.

Das Drucktuch besteht im Wesentlichen aus einer Basisschicht 1, einer kompressiblen Zwischenschicht 2 und einer dem Bedruckmaterial zugewandten Deckgummischicht 3. In die Basisschicht 1 ist ein Festigkeitsträger 4 in Form eines zweilagigen Baumwollgewebes eingebracht. Es können jedoch auch andere Festigkeitsträger wie Folien, Bleche und Gewebe aus anderen Materialien sowie Gewirke Bestandteil der Basisschicht 1 sein. An die Basisschicht 1 schließt sich die kompressible Zwischenschicht 2 an, die gasförmige, in sich abgeschlossene Poren 5 enthält, die eine ausreichend hohe Kompressibilität der Zwischenschicht 2 gewährleisten.The printing blanket essentially consists of a base layer 1, one compressible intermediate layer 2 and one facing the printing material Cover rubber layer 3. In the base layer 1 is a reinforcement 4 in shape a two-ply cotton fabric. However, it can also other reinforcements such as foils, sheets and fabrics from others Materials and knitted fabrics form part of the base layer 1. To the Base layer 1 is followed by compressible intermediate layer 2, which contains gaseous, self-contained pores 5 which are sufficiently high Ensure the compressibility of the intermediate layer 2.

Über eine Haftgummierung 6 und/oder eine Ausgleichsschicht 7, in der eine Gewebelage eingelagert sein kann, ist die Zwischenschicht 2 mit der Deckgummischicht 3 verbunden, die eine nur geringe Dicke und hohe Elastizität aufweist, so dass sich deren Oberfläche dem Profil des Bedruckmaterials beim Druckvorgang hinreichend gut anpassen kann.Via an adhesive rubber 6 and / or a compensation layer 7, in which one Fabric layer can be stored, the intermediate layer 2 with the Cover rubber layer 3 connected, which has only a small thickness and high elasticity has, so that the surface of the profile of the printing material at Can adjust the printing process sufficiently well.

Auf der Grundlage der von der komprimierten Zwischenschicht 2 ausgehenden, relativ gleichmäßig verteilten Anpresskraft der Deckgummischicht 3 an das Bedruckmaterial für eine bezogen auf den Druckvorgang relevante Zeit, wird ein hinreichend intensiver und reproduzierbarer Übergang von Druckfarbe erzielt. Im Ergebnis entsteht ein hohen Anforderungen genügendes Druckbild auch für oberflächenstrukturierte bzw. deformationsgefährdete Bedruckmaterialien.On the basis of the starting from the compressed intermediate layer 2, relatively evenly distributed contact pressure of the cover rubber layer 3 to the Printing material for a time relevant to the printing process is a sufficiently intense and reproducible transition from printing ink achieved. in the The result is a high-quality print image for surface-structured or deformation-prone printing materials.

Claims (10)

Drucktuch für Offset-Druck-Anwendungen, vorzugsweise für den Einsatz zum Bedrucken von oberflächenstrukturierten und insbesondere deformationsgefährdeten Druckmaterialien, mit einer dem Druckzylinder zugeordneten Basisschicht (1), einer kompressiblen, Gaseinschlüsse (5) aufweisenden Zwischenschicht (2) und mit einer außenliegenden, dem Bedruckmaterial zugewandten Außenschicht (3),
dadurch gekennzeichnet, dass die kompressible Zwischenschicht (2) als Elastomerschicht oder thermoplastische Elastomerschicht ausgebildet ist, dass die Zwischen - schicht (2) direkt unter Verwendung eines Haftvermittlers (6) und/oder unter Einsatz einer Ausgleichsschicht (7) mit der Außenschicht (3) verbunden ist, deren Dicke im Vergleich zur kompressiblen Zwischenschicht (2) gering ist, wobei die Elastizität der Außenschicht (3) und das Kompressionsverhalten der kompressiblen Zwischenschicht (2) derart gewählt sind, dass die beim Druckvorgang auf das Drucktuch wirkende Kraft zu einer Verformung des Verbundes aus kompressibler Zwischenschicht (2) und Außenschicht (3) dahingehend führt, dass eine vollflächige Auflage des Drucktuches auf dem Bedruckmaterial sowie eine gleichförmige Verteilung des lokalen Druckes erreicht wird.Printing blanket for offset printing applications, preferably for use in printing surface-structured and, in particular, deformation-prone printing materials, with a base layer (1) assigned to the printing cylinder, a compressible intermediate layer (2) with gas inclusions (5) and with an external printing material facing outer layer (3),
characterized in that the compressible intermediate layer (2) is designed as an elastomer layer or thermoplastic elastomer layer, that the intermediate layer (2) is made directly with the outer layer (3) using an adhesion promoter (6) and / or using a compensating layer (7) is connected, the thickness of which is small compared to the compressible intermediate layer (2), the elasticity of the outer layer (3) and the compression behavior of the compressible intermediate layer (2) being chosen such that the force acting on the printing blanket during the printing process leads to a deformation of the Composite of compressible intermediate layer (2) and outer layer (3) leads to the fact that the blanket is completely supported on the printing material and that the local pressure is uniformly distributed. Drucktuch nach Anspruch 1, dadurch gekennzeichnet, dass die kompressible Zwischenschicht (2) geschlossenporig ausgebildet ist. Printing blanket according to claim 1, characterized in that the compressible intermediate layer (2) is closed-pore. Drucktuch nach Anspruch 2, dadurch gekennzeichnet, dass Parameter wie Porenanteil und Dicke der geschlossenporigen Zwischenschicht (2) derart eingestellt sind, dass bei Einwirkung eines Prüfdruckes von 1350 kPa eine Dickenreduzierung von 20 ― 50 % der Ausgangsdicke des Drucktuches erreicht wird.Printing blanket according to claim 2, characterized in that parameters such as the proportion of pores and the thickness of the closed-pore intermediate layer (2) are set such that a thickness reduction of 20-50% of the initial thickness of the printing blanket is achieved when a test pressure of 1350 kPa is applied. Drucktuch nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass die Dicke des Drucktuches größer als 2,0 mm, insbesondere zwischen 2,5 und 3,0 mm, gewählt ist.Printing blanket according to claim 1 or 3, characterized in that the thickness of the printing blanket is greater than 2.0 mm, in particular between 2.5 and 3.0 mm, is selected. Drucktuch nach Anspruch 1 oder 4, dadurch gekennzeichnet, dass unter Einwirkung eines Prüfdruckes von 1350 kPa eine Reduzierung der Dicke des Drucktuches um 0,45 - 0,90 mm erfolgt.Printing blanket according to claim 1 or 4, characterized in that under the action of a test pressure of 1350 kPa, the thickness of the printing blanket is reduced by 0.45-0.90 mm. Drucktuch nach Anspruch 1, dadurch gekennzeichnet, dass die Dicke der kompressiblen Zwischenschicht (2) 1- 2 mm beträgt.Printing blanket according to claim 1, characterized in that the thickness of the compressible intermediate layer (2) is 1- 2 mm. Drucktuch nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis der Dicke der Außenschicht (3) zur Dicke der kompressiblen Zwischen - schicht (2) 1 : 2,5 bis 1 : 7 beträgt.Printing blanket according to claim 1, characterized in that the ratio of the thickness of the outer layer (3) to the thickness of the compressible intermediate layer (2) is 1: 2.5 to 1: 7. Drucktuch nach Anspruch 1, dadurch gekennzeichnet, dass die Außenschicht (3) eine Shore-Härte kleiner als 55 ShA aufweist.Printing blanket according to claim 1, characterized in that the outer layer (3) has a Shore hardness less than 55 ShA. Drucktuch nach Anspruch 1, dadurch gekennzeichnet, dass in die Ausgleichsschicht (7) ein Gewebe mit hoher Dehnung eingelagert ist.Printing blanket according to claim 1, characterized in that a fabric with high elongation is embedded in the compensating layer (7). Drucktuch nach Anspruch 9, dadurch gekennzeichnet, dass die Gewebelage eine Dehnung von größer als 7% bei einer Belastung von 500N/5cm besitzt.Printing blanket according to claim 9, characterized in that the fabric layer has an elongation of greater than 7% at a load of 500N / 5cm.
EP00125775A 2000-11-24 2000-11-24 Blanket for offset printing Expired - Lifetime EP1208997B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50010411T DE50010411D1 (en) 2000-11-24 2000-11-24 Blanket for offset printing applications
AT00125775T ATE296207T1 (en) 2000-11-24 2000-11-24 PRINTING CLOTH FOR OFFSET PRINTING APPLICATIONS
EP00125775A EP1208997B1 (en) 2000-11-24 2000-11-24 Blanket for offset printing
JP2001351114A JP2002166678A (en) 2000-11-24 2001-11-16 Blanket used for offset printing
US09/992,014 US20020062753A1 (en) 2000-11-24 2001-11-26 Printing blanket for offset printing applications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00125775A EP1208997B1 (en) 2000-11-24 2000-11-24 Blanket for offset printing

Publications (2)

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EP1208997A1 true EP1208997A1 (en) 2002-05-29
EP1208997B1 EP1208997B1 (en) 2005-05-25

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Family Applications (1)

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EP00125775A Expired - Lifetime EP1208997B1 (en) 2000-11-24 2000-11-24 Blanket for offset printing

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US (1) US20020062753A1 (en)
EP (1) EP1208997B1 (en)
JP (1) JP2002166678A (en)
AT (1) ATE296207T1 (en)
DE (1) DE50010411D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1525997A1 (en) 2003-10-21 2005-04-27 Koenig & Bauer Aktiengesellschaft Blanket on a roller and printing units of a printing machine equipped with the roller
EP1669210A2 (en) * 2002-04-18 2006-06-14 Koenig & Bauer Aktiengesellschaft Printing units of a printing machine
EP2319690A3 (en) * 2009-09-28 2011-06-08 Optipack GmbH Method and device for transferring a coating mass
ITMI20131918A1 (en) * 2013-11-19 2015-05-20 Trelleborg Coated Systems Italy S P A RUBBER TAPERED FOR PRINTING FOR A PRINTING CYLINDER FOR A PRINTING MACHINE, PRINTING CYLINDER WITH SUCH A RUBBER SHEET FOR PRINTING AND A PRINTING MACHINE WITH A CALLED PRINTING CYLINDER

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617773B2 (en) * 2006-06-01 2009-11-17 Goss International Americas, Inc. Blanket size verification using drive torque feedback

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983287A (en) * 1971-11-22 1976-09-28 Minnesota Mining And Manufacturing Company Compressible printing blanket
US5478637A (en) * 1993-06-07 1995-12-26 Sumitomo Rubber Industries, Ltd. Printing offset blanket

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983287A (en) * 1971-11-22 1976-09-28 Minnesota Mining And Manufacturing Company Compressible printing blanket
US5478637A (en) * 1993-06-07 1995-12-26 Sumitomo Rubber Industries, Ltd. Printing offset blanket

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1669210A2 (en) * 2002-04-18 2006-06-14 Koenig & Bauer Aktiengesellschaft Printing units of a printing machine
EP1669211A2 (en) * 2002-04-18 2006-06-14 Koenig & Bauer Aktiengesellschaft Printing units of a printing machine
EP1669210A3 (en) * 2002-04-18 2008-06-04 Koenig & Bauer Aktiengesellschaft Printing units of a printing machine
EP1669211A3 (en) * 2002-04-18 2008-06-04 Koenig & Bauer Aktiengesellschaft Printing units of a printing machine
EP1525997A1 (en) 2003-10-21 2005-04-27 Koenig & Bauer Aktiengesellschaft Blanket on a roller and printing units of a printing machine equipped with the roller
EP2319690A3 (en) * 2009-09-28 2011-06-08 Optipack GmbH Method and device for transferring a coating mass
ITMI20131918A1 (en) * 2013-11-19 2015-05-20 Trelleborg Coated Systems Italy S P A RUBBER TAPERED FOR PRINTING FOR A PRINTING CYLINDER FOR A PRINTING MACHINE, PRINTING CYLINDER WITH SUCH A RUBBER SHEET FOR PRINTING AND A PRINTING MACHINE WITH A CALLED PRINTING CYLINDER
WO2015074908A1 (en) * 2013-11-19 2015-05-28 Trelleborg Coated Systems Italy S.P.A. Printing blanket for a printing cylinder of a printing machine, printing cylinder having said printing blanket, and printing machine having said printing cylinder

Also Published As

Publication number Publication date
DE50010411D1 (en) 2005-06-30
ATE296207T1 (en) 2005-06-15
US20020062753A1 (en) 2002-05-30
JP2002166678A (en) 2002-06-11
EP1208997B1 (en) 2005-05-25

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