System and method for erasing information from a flexible inform

Details System and method for erasing information from a flexible inform System and method for erasing information from a flexible inform

1979-06-04

1981-09-15

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 75, 360105, G11B 547, G11B 2102

Patent

active

042900883

ABSTRACT:
An information storage system has means for erasing information from selected recording tracks of a flexible magnetic recording dis. To ensure that all the remnants of the prior information signal are erased, a magnetic head transducer is first offset a predetermind distance from the centerline of a selected track in one direction from the center of the media and then a predetermined distance in the other direction from the center of the media. The erase signal is applied to the head when the head is in both offset positions. Ideally, when the center of the head is positioned on the center of the track, the head records information in a record band of predetermined width on either side of the centerline of the track. In practice, however, the head may deviate from the centerline position during system operation and thereby record information outside of the record band. Accordingly, the head is moved from its center line position on the selected track so that portions of the track outside the record band are effectively erased.

REFERENCES:
patent: 3869721 (1975-03-01), Korda
patent: 4068268 (1978-01-01), Idemoto et al.
patent: 4163994 (1979-08-01), Sakamoto et al.
patent: 4164781 (1979-08-01), Brown

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