Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1988-06-23
1989-03-14
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record medium
In container
G11B 2303
Patent
active
048129372
ABSTRACT:
In a disk cartridge in which a sheet-like recording medium is fixed to the periphery of a circular center plate which has an approximately square center hole and an almost rectangular eccentric driving hole, and a cartridge rotatably accommodating the sheet-like recording medium and including an upper half and a lower half having a turntable insertion hole in which the circular center plate is loosely fitted; the sheet-like recording medium is positioned in the cartridge by restricting the movement of the circular center plate at the central portion thereof, so that the diameter of the circular center plate can be substantially decreased and aberration of tracking or the like during recording or reproducing is avoided as much as possible.
REFERENCES:
patent: 4194228 (1980-03-01), Duff
patent: 4445157 (1984-04-01), Takahashi
patent: 4535434 (1985-08-01), Kishi
patent: 4571718 (1986-02-01), Cahill et al.
patent: 4586102 (1986-04-01), Bresson
patent: 4628388 (1986-12-01), Kawabe
patent: 4695910 (1987-09-01), Maruyama et al.
"Research Disclosure", Aug. 1984, pp. 378-379.
Kaneko Mika
Nemoto Tsuneo
Eslinger Lewis H.
Maioli Jay H.
Sniezek Andrew S.
Sony Corporation
Tupper Robert S.
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