Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1992-08-28
1993-03-02
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Record medium
In container
36013034, G11B 2303
Patent
active
051914972
ABSTRACT:
In a magnetic disk pack comprising a protective casing rotatably accommodating a flexible magnetic disk thereinside and having a pair of aligned windows formed at corresponding positions respectively so that a magnetic head can be inserted into one of the windows to be brought into sliding contact with the magnetic disk under rotation thereby recording and reproducing picture information on and from the magnetic disk, an inclined surface making an angle with the free rotation plane of the magnetic disk is provided on an inner part of the marginal edge of at least one of the windows or on a member resiliently supported at that position thereby inducing a positive pressure or a negative pressure between the rotating magnetic disk and the inclined surface depending on the direction of rotation of the magnetic disk. Such a positive pressure or negative pressure is utilized to urge or attract the magnetic disk toward and onto the magnetic head so as to ensure satisfactory head touch. In a mangetic disk recording/reproducing apparatus in which magnetic heads are inserted into such a magnetic disk pack, and a magnetic disk is rotated in one direction and the other by a reversible spindle motor, an inclined surface making an angle with the free rotation plane of the magnetic disk is provided on each of control members inserted into the windows of the magnetic disk pack together with the magnetic heads so as to similarly ensure satisfactory head touch.
REFERENCES:
patent: 4577251 (1986-03-01), Okada
patent: 4652960 (1987-03-01), MacDonald, II
patent: 4814922 (1989-03-01), Osanai
patent: 4814926 (1989-03-01), Gulbrandsen
patent: 4907112 (1990-03-01), Watanabe et al.
patent: 4945436 (1990-07-01), Nagashima
Matsumoto Takashi
Matsuo Toshihiko
Nagashima Yasuo
Saito Hitoshi
Fuji Photo Film Co. , Ltd.
Sniezek Andrew L.
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