Static magnetic erasing head

Details Static magnetic erasing head Static magnetic erasing head

1974-09-27

1976-03-30

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Erase

G11B 512, G11B 527

Patent

active

039478912

ABSTRACT:
The present invention relates to an erasing head for a magnetic recording apparatus using a static magnetic field. The erasing head consists of a plurality of magnetic poles having surfaces which confront the recording tape. The first and second poles have polarities opposite to each other. The first pole is arranged to engage a recording track along its full width and magnetizes it to a given polarity. The second pole is arranged to engage the upper half of the track and magnetize it to the opposite polarity. Each half track is magnetized to opposite polarities so that the distortion of output signals is reduced, when the signal is reproduced by a reproducing head engaging both half tracks.

REFERENCES:
patent: 2546927 (1951-03-01), Howell
patent: 2594934 (1952-04-01), Kornei
patent: 2784259 (1957-03-01), Camras
patent: 2908768 (1959-10-01), Steinegger
patent: 3772471 (1973-11-01), Imai et al.

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