Magnetic transfer apparatus for establishing magnetic...

Dynamic magnetic information storage or retrieval – Record copying – Contact transfer

Reexamination Certificate

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C360S015000, C360S016000

Reexamination Certificate

active

06950254

ABSTRACT:
A magnetic transfer apparatus is utilized to establish magnetization on the surface of a magnetic disk. A support mechanism supports the magnetic disk in the magnetic transfer apparatus. A magnetizing mechanism is designed to get opposed to the magnetic disk held by the support mechanism. The magnetizing mechanism applies a magnetic field of variable intensity in response to a change of position in the radial direction of the magnetic disk. The magnetic transfer apparatus enables establishment of a magnetic field of an appropriate intensity at any positions in the radial direction of the magnetic disk. Magnetization of a constant intensity can be established over the surface of the magnetic disk irrespective of a position in the radial direction of the magnetic disk. The magnetic transfer apparatus alone serves to establish a servo pattern of a clear magnetization on the magnetic disk.

REFERENCES:
patent: 5022017 (1991-06-01), Jansen et al.
patent: 5991104 (1999-11-01), Bonyhard
patent: 6643079 (2003-11-01), Komatsu et al.
patent: 6813105 (2004-11-01), Takano
patent: 6813106 (2004-11-01), Mallary
patent: 2001/0048568 (2001-12-01), Ikeda et al.
patent: 2002/0075582 (2002-06-01), Takano
patent: 2003/0043486 (2003-03-01), Nakamura et al.

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