Protected optical disc comprising a flexible closure element

Details Protected optical disc comprising a flexible closure element Protected optical disc comprising a flexible closure element

1983-03-11

1985-11-05

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Disc

369284, G01D 1532

Patent

active

045517339

ABSTRACT:
A protected optical disc adapted for optical recording and playback of information (particularly digital recording) with a rigid element carrying the recording surface, and a flexible element permeable to optical radiation, one of these two elements having the shape of a dish. At least one of the elements is provided with a central hole for receiving a driving shaft, with the joined annular portion or portions of the two elements concentric with the central hole.

REFERENCES:
patent: 4038663 (1977-07-01), Day
patent: 4264911 (1981-04-01), Wilkinson
patent: 4308545 (1981-12-01), Lehureau
Patent Abstracts of Japan, vol. 5, No. 150, Sep. 22, 1981, p. 146P81-56-83852, 56-83851.

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