Method of producing magnetic head

Details Method of producing magnetic head Method of producing magnetic head

1980-03-18

1981-07-21

Kellogg, Arthur D.

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

65 42, 65 43, 65 59R, 29603, G11B 542

Patent

active

042796334

ABSTRACT:
A gapped bar is formed of a pair of rectangular parallelopiped magnetic core block having coil-winding grooves jointed to each other through a medium of a non-magnetic thickness. The gapped bar is provided with a plurality of non-magnetic glass mold parts disposed to limit at least the front gap portion to a predetermined track width. Then, a head core is formed by cutting the gapped bar at the glass mold parts at a predetermined angle to the longitudinal axis of the gapped bar and then effecting required processing such as finishing of the cut surface. Finally, an annealing is effected on thus formed head core at a temperature higher than the deformation point of the glass constituting the mold glass part.

REFERENCES:
patent: 3440360 (1969-04-01), Sugaya
patent: 3819348 (1974-06-01), Murray
patent: 3845550 (1974-11-01), Gooch et al.
patent: 3927470 (1975-12-01), Case
patent: 4114259 (1978-09-01), Dorreboom

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