Optically readable storage disc

Details Optically readable storage disc Optically readable storage disc

1985-02-11

1986-11-11

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Specific disc profile

74573R, 346137, 360135, 360137, G11B 700, G11B 370, G11B 582, G11B 2504

Patent

active

046226613

ABSTRACT:
An interchangeable optically readable storage disk has a substrate with a recording surface, and a cover thereon which may comprise a second substrate with a further recording layer. The disk includes a protecting arrangement at the circumference of the substrate, which includes a balancing arrangement. The balancing may be effected by apertures in the protecting arrangement, or balancing masses affixed thereto.

REFERENCES:
patent: 3838464 (1974-09-01), Doyle
patent: 3854347 (1974-12-01), Hellerich
patent: 4074282 (1978-02-01), Balas et al.
patent: 4300803 (1981-11-01), Chorosevic
patent: 4376963 (1983-03-01), Knoop et al.
patent: 4510508 (1985-04-01), Jonssen

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