Wire print head and process for fabricating it

Details Wire print head and process for fabricating it Wire print head and process for fabricating it

1991-09-13

1993-08-03

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

29608, B41J 228

Patent

active

052322955

ABSTRACT:
A permanent magnet suitable for use in a wire print head is formed of plural split segments. Each split segment is formed by compressing metal powder in a punching direction in the presence of a magnetic field that is perpendicular to the punching direction. The split segments are combined together into an annular configuration. The permanent magnet so formed is attached to a base, followed by the assembly of a base plate and cores to form a magnet assembly. The base plate and the cores are then surface-finished so as to be flush relative to each other.

REFERENCES:
patent: 4225250 (1980-09-01), Wagner et al.
patent: 4921364 (1990-05-01), Yasunaga
patent: 4944615 (1990-07-01), Kato et al.
patent: 5040286 (1991-08-01), Stark
patent: 5152217 (1992-10-01), Farb et al.

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