Disc cassette (disc cartridge)

Dynamic magnetic information storage or retrieval – Record medium – In container

Patent

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Details

G11B 2302

Patent

active

045503540

ABSTRACT:
A disc cassette (11) for containing a disc (18) for rotation equipped with a shutter (14a, 14b) for opening and closing head windows (13) in slot form. The shutter automatically opens when the disc cassette is mounted on a cassette drive apparatus and automatically closes when it is removed therefrom. The shutter is mounted in center openings (15a, 15b) of the disc cassette for rotation therearound and has locked to one end portion thereof a movable belt (22) which causes the shutter to rotate when it moves. The movable belt has fastened thereto a spring (29, 50) for moving the belt in sliding movement to close the shutter at all times when the disc cassette is removed from the cassette drive apparatus.

REFERENCES:
patent: 3416150 (1968-12-01), Lindberg, Jr.
patent: 3529301 (1970-09-01), Hiruta
patent: 4120012 (1978-10-01), Bowers
patent: 4185314 (1980-01-01), Hatchett et al.
patent: 4399480 (1983-08-01), Edwards
patent: 4459628 (1984-07-01), Barton

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