Method for manufacturing a multipolar erasing head

Details Method for manufacturing a multipolar erasing head Method for manufacturing a multipolar erasing head

1977-09-07

1979-04-03

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29593, 29737, 360118, 361143, G11B 542

Patent

active

041469569

ABSTRACT:
Alternate S- and N-poles are disposed on a multipolar erasing head in the direction of a relative movement of the multipolar erasing head to a magnetic recording medium. The multipolar erasing head includes at least one region where the distances between adjacent magnetic poles of the same polarity are successively shortened in the direction for successively erasing the information recorded on the recording medium. A method and apparatus for manufacturing such an erasing head are also disclosed.

REFERENCES:
patent: 3858136 (1974-12-01), Jun
patent: 3961374 (1976-06-01), Murata et al.

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