Disc cassette (disc cartridge)

Details Disc cassette (disc cartridge) Disc cassette (disc cartridge)

1987-10-29

1989-02-21

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2302

Patent

active

RE0328766

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 (1908-12-01), 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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