Erasing method for erasing information corrected on a magnetic r

Details Erasing method for erasing information corrected on a magnetic r Erasing method for erasing information corrected on a magnetic r

1987-08-14

1989-07-25

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 331, 358335, G11B 5024

Patent

active

048519367

ABSTRACT:
An erasing method is used for erasing a video signal written on a track of a rotary magnetic recording medium such as a floppy disk in which the track to be erased is scanned by a magnetic head used for recording. An erasing current having a gradually decreasing amplitude level is applied to the magnetic head. The initial amplitude level of the erasing current is greater than the optimum recording current level for the magnetic head.

REFERENCES:
patent: 2657277 (1953-10-01), Brastad
patent: 4005482 (1977-01-01), Castro et al.
patent: 4376292 (1983-03-01), Mignolet
patent: 4670799 (1987-06-01), Ogura et al.
patent: 4717975 (1988-01-01), Ogura et al.
patent: 4725902 (1988-02-01), Oda et al.

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