Method of making an embossing cylinder

Details Method of making an embossing cylinder Method of making an embossing cylinder

1984-08-31

1985-11-05

Czaja, Donald

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

264225, 264227, 264284, 425385, B29C 102

Patent

active

045512973

ABSTRACT:
A method for producing the matrix for the embossing cylinder which has a uniform pattern design in the marginal areas adjoining the abutment where the ends of the blanket are joined to form the tube comprising (1) casting liquid silicone rubber on a sheet of leather having the desired grain and vulcanizing the silicone, (2) using the matrix thus formed to emboss, under heat and pressure in a press, a rectangular sheet of thermoplastic resin such as polyvinyl chloride film, (3) forming the embossed sheet into a tube, (4) placing the portion of the tube having abutting edges in a narrow platen press and reembossing the area surrounding the abutment with the silicone rubber matrix to mask the impression of the joint and provide a continuous uninterrupted pattern, and (5) using the positively-embossed thermoplastic sheet as a matrix for casting vulcanizable silicone rubber to form a negatively-embossed matrix for use as a blanket on an embossing roll. The embossing roll is used to produce continuous lengths of embossed thermoplastic film with a continuous, uninterrupted grain pattern.

REFERENCES:
patent: 2342556 (1944-02-01), Rockoff
patent: 3015640 (1962-01-01), Weaver et al.
patent: 3081495 (1963-03-01), Kovatch
patent: 3914369 (1975-10-01), Modic et al.
patent: 3917786 (1975-11-01), Weigert
patent: 4250135 (1981-02-01), Orsini
patent: 4283240 (1981-08-01), Speer

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