Charge remover for magnetic disk

Details Charge remover for magnetic disk Charge remover for magnetic disk

2006-08-22

2008-10-21

Feild, Joseph (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S073010, C360S078040

Reexamination Certificate

active

07440218

ABSTRACT:
A loading/unloading type magnetic disk unit includes a magnetic disk that is rotated or driven by a motor, and a head slider bearing a magnetic head and being movable above the magnetic disk owing to a driving mechanism. Herein, at least one projection made of a highly conductive material is formed on the surface of the head slider opposed to the magnetic disk. When the magnetic disk unit is in operation, conduction to the spindle motor is discontinued after the elapse of a predetermined time. Thus, the height by which the head slider floats is decreased so that the projections come into contact with the magnetic disk. Consequently, a charge on the magnetic disk escapes through the housing of the magnetic disk unit via the head slider. Thus, when the loading/unloading type magnetic disk unit is in operation, a charge on the magnetic disk can be removed.

REFERENCES:
patent: 4058846 (1977-11-01), Knutson et al.
patent: 6324031 (2001-11-01), Comstock et al.
patent: 6686673 (2004-02-01), Komura et al.
patent: 2006/0034016 (2006-02-01), Kameyama
patent: 61-170958 (1986-08-01), None
patent: 01-119957 (1989-05-01), None
patent: 03-232169 (1991-10-01), None

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