Method of manufacturing a single-track video ferrite record/repr

Details Method of manufacturing a single-track video ferrite record/repr Method of manufacturing a single-track video ferrite record/repr

1978-09-22

1983-02-08

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

G11B 542

Patent

active

043720366

ABSTRACT:
Two magnetic ferrite pieces having longitudinal channels formed in the side faces thereof are bonded together with a gapping substance so that the resultant channels form a window. The bonded pieces are precisely slotted to a depth below the apex of the window to form a narrow track-defining comb-like array. The resulting slots are adapted to receive gap-protecting compatible ceramic support material which is so chosen as to wear slightly faster than the ferrite surfaces. In one embodiment, the slots contain ceramic-convertible glass which is devitrified by firing the array. The assembly is then processed to form a ceramic-ferrite-ceramic or ceramic-ferrite transducer sandwich which may be further processed to form part of a magnetic record and/or reproduce head.

REFERENCES:
patent: 3402463 (1968-09-01), Bos et al.
patent: 3593414 (1971-07-01), Beun et al.
patent: 3710038 (1973-01-01), Sakai et al.
patent: 3845550 (1974-11-01), Gooch et al.
patent: 3927470 (1975-12-01), Case
patent: 3983622 (1976-10-01), Schneider et al.

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