Disc cartridge

Details Disc cartridge Disc cartridge

1989-09-12

1991-08-27

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

369292, 206444, 206586, G11B 3300, G11B 3302

Patent

active

050439740

ABSTRACT:
A disc cartridge having a cartridge body in which a magneto-optical disc is rotatably accommodated in a hermetic-fashion so as to be capable of recording and/or reproduction. The cartridge body has a concave recessed portion extended from an insertion side end face of the cartridge body to a central portion of the cartridge body to allow the introduction of an external magnetic field generating means which generates an external magnetic field to record an information signal on the magneto-optical disc accommodated within the cartridge body.

REFERENCES:
patent: 3030728 (1962-04-01), Wesman
patent: 3041775 (1962-07-01), Brown
patent: 3404827 (1968-10-01), Carmody
patent: 3695421 (1972-10-01), Wood
patent: 3701465 (1972-10-01), Richter
patent: 3812588 (1974-05-01), Bennett
patent: 3836043 (1974-09-01), Levin
patent: 4127192 (1978-11-01), Card
patent: 4496054 (1985-01-01), Koltun
patent: 4535434 (1985-08-01), Kishi
patent: 4542495 (1985-09-01), Ziegler
patent: 4636904 (1987-01-01), Matsumo
patent: 4740948 (1988-04-01), Nakamori
patent: 4782417 (1988-11-01), Tanaka

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