Process for making video discs

Details Process for making video discs Process for making video discs

1980-03-04

1982-10-19

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264106, 264145, 264154, 264236, H05B 100, B29D 1700

Patent

active

043549888

ABSTRACT:
A process for making video discs by moulding from an engraved master which includes depositing on one edge of the master an elongated fillet of a curable resin; photopolymerizable or thermosetting and spreading gradually the resin between the master and a flexible film of a substrate which is applied by means of a pressure roller, the resin being then cured as required by ultra-violet or infrared radiation through the film. The process may also include piercing the central hole and cutting out the disc. The formation of a succession of discs on the same film may be made automatic, the film advancing step by step between each moulding and/or cutting out operation.

REFERENCES:
patent: 3768946 (1973-10-01), Matuschke
patent: 3874836 (1975-04-01), Johnson et al.
patent: 3983795 (1976-10-01), Bode
patent: 4112030 (1978-09-01), Kremzow
patent: 4141731 (1979-02-01), Jarsen

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