Apparatus for erasing information recorded on an information rec

Details Apparatus for erasing information recorded on an information rec Apparatus for erasing information recorded on an information rec

1991-07-29

1993-04-27

Nguyen, Hoa T.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, 369112, G11B 1303, G11B 1112, G11B 1110

Patent

active

052068439

ABSTRACT:
An information recording medium processing apparatus including a light radiating device that uniformly radiates a light beam on a plurality of recording tracks of an information recording medium and a magnetic field applying unit that applies a magnetic field to a region of the information recording medium irradiated with the light beam, thereby simultaneously erasing information recorded in the plurality of recording tracks.

REFERENCES:
patent: 4853912 (1989-08-01), Akasaka et al.
patent: 4984224 (1991-01-01), Tsuyuguchi et al.
patent: 4984225 (1991-01-01), Ando
patent: 4985885 (1991-01-01), Saito et al.
patent: 5038330 (1991-08-01), Tanaka
patent: 5056081 (1991-10-01), Hsieh

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