Dot line printer having improved comb yoke

Details Dot line printer having improved comb yoke Dot line printer having improved comb yoke

1991-05-22

1993-03-09

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by movement of record-medium against type-face

101 9329, B41J 938

Patent

active

051921480

ABSTRACT:
A hammer bank assembly including a hammer base, a plurality of leaf spring type printing hammers, permanent magnets, a comb yoke and electromagnetic coils. The comb yoke has a base portion positioned on the permanent magnets and police portions secured by the base portion and extending from the base portion toward the rear faces of the printing hammers. The pole portions are made of a material capable of providing highly saturated magnetic flux density, and the base portion comprising a plurality of metal plates laminated together and containing another material which provides low saturated magnetic flux density.

REFERENCES:
patent: 4258623 (1981-03-01), Barrus et al.
patent: 4674897 (1987-06-01), West et al.
patent: 4682903 (1987-07-01), Agata
patent: 4833980 (1989-05-01), Bringhurst
patent: 4913569 (1990-04-01), Koyama et al.
patent: 4995744 (1991-02-01), Goldowsky et al.
patent: 5046871 (1991-09-01), Saitou et al.

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