Method for forming magnetic gap of video signal erasure...

Details Method for forming magnetic gap of video signal erasure... Method for forming magnetic gap of video signal erasure...

2006-04-11

2006-04-11

Tran, Thai (Department: 2616)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C360S118000

Reexamination Certificate

active

07027709

ABSTRACT:
The invention provides a simple method for forming a gap for an erasure head to improve the quality of this erasure head. A front core3constituting an erasure head H includes in configuration two magnetic substances5and a magnetic gap6made of a non-magnetic substance arranged between these two magnetic substances5, in which the gap6made of the non-magnetic substance is bonded by adhesion or welding between those two magnetic substances5. By this method, the gap can be formed free of an air bubble, with good mass-productivity, and inexpensively as compared to a prior art method of forming a gap by glass bonding.

REFERENCES:
patent: 4264939 (1981-04-01), Takii et al.
patent: 4387410 (1983-06-01), Takanohashi et al.
patent: 56-77020 (1979-11-01), None
patent: 57-173124 (1981-04-01), None
patent: 63-99307 (1988-06-01), None
patent: 02-046510 (1990-02-01), None
patent: 07-220229 (1995-08-01), None

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