Method for making video discs and video disc molds

Details Method for making video discs and video disc molds Method for making video discs and video disc molds

1976-12-22

1978-12-19

Hoag, Willard E.

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

264310, 264313, 264337, B29C 500, B29C 504, B29H 3042

Patent

active

041306201

ABSTRACT:
A matrix is used to prepare a mold of an elastomeric material. A polymerizable compound is coated onto a flexible, thin substrate such as Mylar and is placed with compound side in intimate contact with the mold. The compound is cured and is bonded to the substrate. The cured combination is stripped from the mold and is given a metallic coating to improve reflectivity. A clear plastic coating may be applied to protect the metal surface.

REFERENCES:
patent: 1991009 (1935-02-01), Browne et al.
patent: 3190947 (1965-06-01), Norcross
patent: 3840316 (1974-10-01), Poeschl
patent: 3842194 (1974-10-01), Clemens
patent: 3855426 (1974-12-01), Bouwhuis

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