Apparatus for manufacturing an optical disk substrate by injecti

Details Apparatus for manufacturing an optical disk substrate by injecti Apparatus for manufacturing an optical disk substrate by injecti

1991-08-05

1992-10-20

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

249112, 2491141, 264 11, 366 79, 425207, 428627, 428698, B29C 4548, B29C 4560, B29C 4738

Patent

active

051568608

ABSTRACT:
An apparatus for manufacturing an optical disk substrate having a foreign-substances index of not more than 1.times.10.sup.5 .mu.m.sup.2 /g, an optical information-storage medium wherein the substrate has an information-recording layer, includes a cylinder with a liner and a screw coated with TiC and TiN.

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patent: 4686156 (1987-08-01), Baldoni, II et al.
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patent: 4863661 (1989-09-01), Maddy
patent: 4881886 (1989-11-01), Newman
patent: 4892788 (1990-01-01), Miller et al.
patent: 4949836 (1990-08-01), Schostek

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