Bias magnetic field moving apparatus for a photomagnetic recordi

Details Bias magnetic field moving apparatus for a photomagnetic recordi Bias magnetic field moving apparatus for a photomagnetic recordi

1989-05-18

1992-04-07

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360137, G11B 1304, G11B 1110, G11B 1112

Patent

active

051034352

ABSTRACT:
A bias magnetic field moving apparatus for photomagnetic recording apparatus includes an arm rotatably provided in a photomagnetic recording apparatus so that one end side of the arm can approach and separate from a photomagnetic recording medium. An arm rotating mechanism rotates the arm so that one end side of the arm may approach and separate from the photomagnetic recording medium as operatively connected with the operation of loading and unloading the photomagnetic recording medium on the photomagnetic recording apparatus. A magnetic field applying member is rotatably connected to one end side of the arm, approaching and separating from the photomagnetic recording medium as operatively connected with the operation of loading and unloading the photomagnetic recording medium and applying a recording or erasing bias magnetic field to the photomagnetic recording medium. A maintaining mechanism maintains the magnetic field applying member to be parallel with the photomagnetic recording medium when the magnetic field applying member has separated the most from the photomagnetic recording medium. A fixing mechanism fixes the magnetic field applying member so as to be in a predetermined position relationship with the photomagnetic recording medium.

REFERENCES:
patent: 4694364 (1987-09-01), Matsuda et al.
patent: 4709286 (1987-11-01), Koike
patent: 4733385 (1988-03-01), Henmi et al.
patent: 4740937 (1988-04-01), Watanabe
patent: 4750063 (1988-06-01), Kume et al.
patent: 4890175 (1989-12-01), Tezuka
patent: 4993009 (1991-02-01), Shiho

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