Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1988-01-15
1988-12-27
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360133, 360 9912, G11B 5012
Patent
active
047944790
ABSTRACT:
A window shuttering mechanism for a cassette has (a) a shutter for covering and exposing a window through which a recording medium of the cassette is accessed; (b) a lock for holding the shutter in its closed position in which the window is covered; (c) a projection for releasing the shutter held by the lock from its closed position when the cassette is inserted into a cassette recording/playback apparatus; and (d) a sequential actuator for generating and storing a biasing force as the cassette is inserted into the cassette recording/playback apparatus and laterally engaging the shutter immediately before the projection releases the shutter from its closed position through exertion of the stored biasing force, to move the shutter to expose the window upon continued insertion movement of the cassette and return the shutter to closed condition upon removal movement of the cassette.
REFERENCES:
patent: 4320430 (1982-03-01), Vogt
patent: 4497009 (1985-01-01), Oishi et al.
patent: 4543619 (1985-09-01), Pastor
patent: 4581670 (1986-04-01), Nemoto et al.
patent: 4626949 (1986-12-01), Brock et al.
Hecker Stuart N.
Severin David J.
Sony Corporation
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