Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1986-05-29
1994-03-29
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
360133, 206310, 206444, B65D 8530, G11B 2303
Patent
active
052991865
ABSTRACT:
A disc protecting cover for preventing a disc used as an information recording medium from being damaged or wounded while the disc is not in use, which comprises a flat portion (11;11A) having a diameter smaller than that of a disc which is provided with a center hole and a signal reading surface portion formed on a part of the surface thereof extending around the center hole, and an engaging portion (12) projecting from a central part of the flat portion (11'11A) and adapted to be inserted into the center hole of the disc to engage with the same. The flat portion (11;11A) covers the signal reading surface portion of the disc when the engaging portion (12) is inserted into the center hole of the disc to engage with the same. The disc protecting cover is attached to the disc to be detachable therefrom and can reliably protect the signal reading surface portion of the disc against damage or wound without covering portions of the disc which are not required to be covered therewith.
REFERENCES:
patent: 2501465 (1950-03-01), Caramanoff
patent: 3949872 (1976-04-01), Paudras
patent: 3961656 (1976-06-01), Aggarwal
patent: 4556968 (1985-12-01), Pelkey et al.
patent: 4613921 (1986-09-01), Holmes
patent: 4672600 (1987-06-01), Balston et al.
patent: 4694448 (1987-09-01), Tamaru et al.
patent: 4793480 (1988-12-01), Gelardi et al.
patent: 4879710 (1989-11-01), Iijima
High Fidelity, Dec. 1982, p. 45.
Levy Stuart S.
Rhoa Joseph A.
Sony Corporation
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