Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1975-03-25
1977-04-12
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
1014011, 156234, 156235, 156238, 156241, 156254, 156298, 264163, 264259, B29C 102, B32B 3118
Patent
active
040175812
ABSTRACT:
A process for preparing a mold for relief printing masters, said mold having an adhesive silicone surface, is provided comprising depositing a particulate material in image configuration on a suitable substrate, contacting said substrate with a second member comprising a substrate with an adhesive coating of a silicone gum curable to an adhesive elastomeric condition such that the adhesive gum is in contact with the image material, separating the members whereby the silicone layer splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material to the second member in the image areas, and curing the silicone gum on the first member to an adhesive elastomeric condition to provide a mold for printing masters. The process for preparing the printing master comprises the additional steps of filling the submerged portions of said mold with a liquid but hardenable material suitable for master imaging, contacting said liquid with a suitable master substrate, hardening the liquid material and removing the resultant printing master.
REFERENCES:
patent: 3141407 (1964-07-01), Leeds
patent: 3379813 (1968-04-01), Amstin
patent: 3428725 (1969-02-01), Delmonte
patent: 3485696 (1969-12-01), Hammonds
patent: 3741787 (1973-06-01), Tordjman
patent: 3792147 (1974-02-01), Wohforth et al.
Lowe James B.
MacKay Donald M.
O'Sullivan James P.
Ralabate James J.
Xerox Corporation
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