Demagnetizing apparatus for erasing signals recorded on concentr

Details Demagnetizing apparatus for erasing signals recorded on concentr Demagnetizing apparatus for erasing signals recorded on concentr

1986-10-20

1989-04-11

Faber, Alan

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 46, 360 67, 360 61, G11B 524, G11B 502

Patent

active

048211273

ABSTRACT:
A demagnitizing apparatus erases, track by track, wide-band and high-frequency recorded signals such as signals which are frequency-modulated (FM) with video signals, and thus eliminates the need for a relay to switch a single magnetic head between erasing capability and recording or reproducing capability.

REFERENCES:
patent: 3649752 (1972-03-01), Kinjo
patent: 3723668 (1973-03-01), Ritchey, Jr.
patent: 4670799 (1987-06-01), Ogura et al.
patent: 4714969 (1987-12-01), Bischoff et al.

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