Method of making a printing blanket

Details Method of making a printing blanket Method of making a printing blanket

1977-08-01

1979-11-13

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

428250, 428310, 428320, 428909, B29C 300

Patent

active

041742443

ABSTRACT:
The present invention provides an improvement in the manufacture of laminates containing a rubber surface and particularly to a method of preparing printing blankets for the printing industry wherein the top or printing layer comprises a substantially void-free fluoroelastomer. The improved method of preparing the printing blankets of the invention comprises preparing a composite of a fibrous or pressure sensitive adhesive backing material; a layer of a foamable and cross-linkable elastomeric material over the backing material; a second fibrous material over the layer of foamable material; a top layer of a non-foamable cross-linkable elastomeric material over said second layer of fibrous material; and molding the composite at an elevated temperature under pressure. The improved process of the present invention provides a compressible printing blanket having a top layer surface which not only is substantially void free but also is substantially free of surface irregularities.

REFERENCES:
patent: 1398147 (1921-11-01), Ninotny
patent: 2792321 (1957-05-01), Fredericks
patent: 3143457 (1964-08-01), Morris
patent: 3186894 (1965-06-01), Liles et al.
patent: 3235772 (1966-02-01), Gurin
patent: 3519527 (1970-07-01), Crowley
patent: 3700541 (1972-10-01), Shrimpton et al.
patent: 3795568 (1974-03-01), Rhodarmer et al.
patent: 3881045 (1975-04-01), Strunk

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