Optically readable information disc

Details Optically readable information disc Optically readable information disc

1986-02-03

1987-05-26

Thomas, Alexander S.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

430271, 430945, 369284, 369286, 369288, G01D 1514

Patent

active

046685499

ABSTRACT:
Optically readable information disc having a substrate plate manufactured by an injection moulding process or a compression moulding process and composed of a mixture of 40-90% by weight of polymethylmethacrylate and 10-60% by weight of polyvinylchloride or chlorinated polyvinylchloride.

REFERENCES:
patent: 4423427 (1983-12-01), Kaiser

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