Method for recording servo control signals on a magnetic disc

Details Method for recording servo control signals on a magnetic disc Method for recording servo control signals on a magnetic disc

1985-09-05

1987-02-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

G11B 586

Patent

active

046444165

ABSTRACT:
A magnetic record medium is subjected to a first magnetic field for uniformly magnetizing the medium in a direction of the thickness thereof. The uniformly magnetized medium is placed in face-to-face contact with a ferromagnetic member on which a plurality of spaced geometrically varying regions are arranged in track turns and subjected to a second magnetic field oriented in a direction opposite to the direction of orientation of the first magnetic field to produce a plurality of spaced oppositely magnetized regions in the record medium.

REFERENCES:
patent: 4422106 (1982-12-01), Sawazaki
Funkschau Sonderheft no. 36, Heimuideotechnik, 2/1981, p.24.

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