Magnetic erasing head

Details Magnetic erasing head Magnetic erasing head

1987-03-20

1989-02-14

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Gap spacer

360120, 360126, G11B 523, G11B 5235, G11B 5147

Patent

active

048050580

ABSTRACT:
A magnetic erasing head comprises a pair of magnetic core elements defining an erasing magnetic gap therebetween and facing to a travelling magnetic recording medium, a coil winding opening provided adjacent to the erasing magnetic gap on one of the magnetic core elements located on a trailing side relative to travelling of the magnetic recording medium and defining a depth of the erasing magnetic gap, and a coil wound through the coil winding opening to be provided an alternating current flow for generating erasing magnetic field at the erasing gap, the coil winding opening defining a core portion adjacent to the trailing side having a thickness substantially equal to the depth of the erasing magnetic gap.

REFERENCES:
patent: 4176384 (1979-11-01), Yang
patent: 4180835 (1979-12-01), Okumura et al.
patent: 4205356 (1980-05-01), Tanaka et al.
patent: 4316228 (1982-02-01), Fujiwara et al.
patent: 4450494 (1984-05-01), Fujiwara et al.
patent: 4476509 (1984-10-01), Konishi et al.
patent: 4559572 (1985-12-01), Kumasaka et al.
W. Nystrom, "Hybrid Ferrite Head for High-Density Recording", IBM Technical Disclosure Bulletin, vol. 12, No. 12, May 1970.

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