Apparatus for making video discs

Details Apparatus for making video discs Apparatus for making video discs

1982-03-03

1983-10-04

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Radiated energy

425364, 425374, 425810, 425811, B28B 1700

Patent

active

044076460

ABSTRACT:
An apparatus 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 thermosettable 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 apparatus may also include a mechanisms for piercing the central hole and cutting out the disc. The formation of a succession of discs on the same film may be automatically obtained, the film advancing step by step between each moulding and/or cutting out operation.

REFERENCES:
patent: 4294782 (1981-10-01), Froehlig
patent: 4304806 (1981-12-01), Anderson et al.

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