DE2012288A1 - Offset printing plate - Google Patents

Offset printing plate

Info

Publication number
DE2012288A1
DE2012288A1 DE19702012288 DE2012288A DE2012288A1 DE 2012288 A1 DE2012288 A1 DE 2012288A1 DE 19702012288 DE19702012288 DE 19702012288 DE 2012288 A DE2012288 A DE 2012288A DE 2012288 A1 DE2012288 A1 DE 2012288A1
Authority
DE
Germany
Prior art keywords
layer
plate
printing
printing plate
offset printing
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.)
Pending
Application number
DE19702012288
Other languages
German (de)
Inventor
Heinrich 8700 Wurzburg C05f 11 02 Großhauser
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.)
Schnellpressenfabrik Koenig and Bauer AG
Original Assignee
Schnellpressenfabrik Koenig and Bauer AG
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 Schnellpressenfabrik Koenig and Bauer AG filed Critical Schnellpressenfabrik Koenig and Bauer AG
Priority to DE19702012288 priority Critical patent/DE2012288A1/en
Publication of DE2012288A1 publication Critical patent/DE2012288A1/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

Offset printing plate has a rigid waist sheet as a base plate, of the required thickness for relief print and coated with the printing layer. Specifically the plate is Al with a photo-chemical or photopolymeric layer, steel with a bimetallic layer, brass with a Cr layer or plastics with a photopolymeric layer.

Description

O f f a e t d r u c k p 1 a t t e Die Erfindung betrifft eine Druckplatte für das Offaetverfahren. The invention relates to a printing plate for the offset process.

Druckplatten dieser Art sind bekannt. Sie sind aus einer dünnen, biegsamen Grundplatte von 0,1 bis 0,5 mm Dicke gebildet, auf der die druckenden Schichten aufgebracht sind.Printing plates of this type are known. They are made of a thin, flexible material Base plate 0.1-0.5 mm thick is formed on which the printing layers are upset.

Die Grundplatten können aus Stahl, Messing, Aluminium oder ähnlichem bestehen. Das Aufspannen auf den Formzylinder bietet bei großen Breiten und Umfängen besondere Probleme.The base plates can be made of steel, brass, aluminum or the like exist. Clamping onto the forme cylinder offers great widths and sizes special problems.

Die Druckplatten sind an den Enden genau absukanten. FUr ein exaktes Aufspannen werden sie großen Spankräften ausgesetzt. Dadurch- werden besonders die Abkantungen sehr stark beansprucht.The ends of the pressure plates are precisely cut off. For an exact When they are clamped, they are exposed to great chipping forces. As a result, especially the Folds are very heavily used.

Das Spannön solcher Platten beansprucht viel Ze-t, so daß bei großer Plattenzahl je Maschine, vor allem bei Zeitungsmaschinen, die Rüstzeit ungünstig beeinflußt wird.The tensioning of such plates requires a lot of time, so that with large Number of plates per machine, especially for newspaper presses, the makeready time is unfavorable being affected.

Dem Gegenstand der Erfindung liegt die Aufgabe zugrunde, eine Offset-Druckplatte zu schaffen, bei der das Spannen sehr rasch vor sich geht, die sich problemlos, wie z.B.The object of the invention is based on the object of an offset printing plate to create, in which the clamping takes place very quickly, which can be easily such as.

ein Sattel oder eine Stereotypieplatte, spannen läßt und die nach Gebrauoh nicht verloren ist.a saddle or a stereotype plate, can be tightened and that after Need not be lost.

Die Aufgabe ist erfindungsgemäß dadurch gelöst, daß als Grundplatte eine beim Hochdruck bekannte starre Sattelplatte in der beim Hochdruck üblichen Plattendicke dient, die mit der druckenden Schicht beschichtet ist.The object is achieved according to the invention in that as a base plate a rigid saddle plate known for high pressure in the one common for high pressure Plate thickness is used, which is coated with the printing layer.

Ir weiterer Ausgestaltung der Erfindung besteht die Druckplatte in an sich bekannter Weise aus Aluminium mit einer fotochemischen oder fotopolymeren Schicht, oder sie besteht aus Stahl mit einer Bimetallschicht oder aus Messing mit einer Chromschicht oder schließlich aus Kunststoff mit einer Fotopolymerschicht.In a further embodiment of the invention, the pressure plate consists of known per se from aluminum with a photochemical or photopolymer Layer, or it consists of steel with a bimetal layer or brass with a chrome layer or finally made of plastic with a photopolymer layer.

Bs sind auch andere Kombinationen denkbar.Other combinations are also conceivable.

Bei den bekanntn, dünnen Druckplatten entstehen druckfreie Spalte von mindestens 8 bis 10 mm zwischen den Platten oder den Plattenanfingen und -enden. Bei den erfindungsgemäßen Druckplatten können diese Spalt. auf etwa 1 mm reduziert werden. Die erfindungsgemäßen Platten können, wie bei den Verschlüssen in Hochdruckmaschinen, in Umfangs- und Seitenrichtung registert werden. Durch Verwendung der vorgeschlagenen Offsetdruckplatte bietet das Spannen keine Probleme, wie sie bei der dünnen Druckplatte auftreten. Das Spannen benötigt wesentlich weniger Zeit als bei den bisher bekannten Platten.With the known, thin printing plates, pressure-free gaps are created at least 8 to 10 mm between the panels or the panel beginnings and ends. In the case of the printing plates according to the invention, this gap can. reduced to about 1 mm will. The plates according to the invention can, as with the closures in high pressure machines, can be registered in circumferential and lateral direction. By using the suggested Offset printing plates do not have any problems with tensioning, as they do with the thin printing plate appear. The tensioning takes much less time than with the previously known Plates.

Claims (2)

PATENTANSPRÜCHEPATENT CLAIMS 1. Druckplatte für das Offsetverfahren, dadurch gekennzeichnet, daß als Grundplatte eine beim Hochdruck bekannte starre Sattelplatte in der im Hochdruck üblichen Plattendicke dient, die mit der druckenden Schicht beschichtet ist.1. Printing plate for the offset process, characterized in that as a base plate a rigid saddle plate known in high pressure in the high pressure usual plate thickness is used, which is coated with the printing layer. 2. Druckplatte nach Anspruch 1, dadurch gekennzeichnet, daß sie aus Aluminium mit einer fotochemischen oder fotopolymeren Schicht, aus Stahl mit einer Bimetallschicht, aus Messing mit einer Chromschicht oder aus Kunststoff mit einer fotopolymeren Schicht besteht.2. Printing plate according to claim 1, characterized in that it consists of Aluminum with a photochemical or photopolymer layer, steel with a Bimetal layer, made of brass with a chrome layer or plastic with a photopolymer layer.
DE19702012288 1970-03-14 1970-03-14 Offset printing plate Pending DE2012288A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19702012288 DE2012288A1 (en) 1970-03-14 1970-03-14 Offset printing plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702012288 DE2012288A1 (en) 1970-03-14 1970-03-14 Offset printing plate

Publications (1)

Publication Number Publication Date
DE2012288A1 true DE2012288A1 (en) 1971-10-07

Family

ID=5765164

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702012288 Pending DE2012288A1 (en) 1970-03-14 1970-03-14 Offset printing plate

Country Status (1)

Country Link
DE (1) DE2012288A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958994A (en) * 1974-08-26 1976-05-25 American Hoechst Corporation Photosensitive diazo steel lithoplate structure
US3979212A (en) * 1974-10-04 1976-09-07 Printing Developments, Inc. Laminated lithographic printing plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958994A (en) * 1974-08-26 1976-05-25 American Hoechst Corporation Photosensitive diazo steel lithoplate structure
US3979212A (en) * 1974-10-04 1976-09-07 Printing Developments, Inc. Laminated lithographic printing plate

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