Magnetic head

Details Magnetic head Magnetic head

1978-06-14

1980-09-09

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Gap spacer

360122, 360125, G11B 522, G11B 525

Patent

active

042220840

ABSTRACT:
Disclosed is a magnetic head used for a vertical magnetizing system comprising a core having a pair of leg portions and an auxiliary magnetic pole which is arranged so as to face both leg portions. A closed magnetic path is formed by the core and the auxiliary magnetic pole. A sharp edge is formed at each end of the leg portions. A magnetic recording medium passes through the gap between the sharp edges and the auxiliary magnetic pole. When the magnetic recording medium passes through the gap, a high density magnetic recording operation is performed by the magnetic field produced by each sharp edge. Moreover, the recording operation can be effectively carried out due to the closed magnetic path and the recording magnetic field magnetized on the magnetic recording medium can be read out by using the same magnetic head as the magnetic head which is used for the recording operation. In an embodiment of a magnetic head of the invention, a magnetic thin film is coated on each surface of the side walls of the leg portions.

REFERENCES:
patent: 3064087 (1962-11-01), Gabor
patent: 3313889 (1967-04-01), Machinski
patent: 3371164 (1968-02-01), Makimura
patent: 3373416 (1968-03-01), Geurst et al.
patent: 3485958 (1969-12-01), Bos et al.
patent: 3653011 (1972-03-01), Donohue et al.
patent: 3984874 (1976-10-01), Mano

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