Disc-shaped information carrier having a high storage density

Details Disc-shaped information carrier having a high storage density Disc-shaped information carrier having a high storage density

1979-04-23

1985-05-07

Cannon, James C.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

369288, 428 65, 523174, B29D 1700, B32B 302, G06K 1902, G11B 2300

Patent

active

045158436

ABSTRACT:
A disc-shaped information carrier produced by thermoplastic deformation comprising a pressed mass including a co-polymer of vinyl chloride having additives incorporated therein. The carrier has hygroscopic properties and relief-like surface portions which are sufficiently yielding to permit pressure scanning.

REFERENCES:
patent: 4071490 (1978-01-01), Andraschek et al.

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