Process for making information carrying discs

Details Process for making information carrying discs Process for making information carrying discs

1980-02-01

1983-02-15

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264106, 264175, B29D 1100

Patent

active

043740774

ABSTRACT:
Imperfections in the surface of information carrying discs, such as video discs, are avoided by an improved process of manufacture. A bead of photopolymerizable mass is moved between two surfaces, one of which is a patterned surface and the other is a surface to which the photopolymerizable mass will bond upon polymerizing. By moving the liquid mass across the patterned surface, air within the pattern is removed by the leading edge of the bead, reducing imperfections.

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