Small impact printer with hammer mask

Details Small impact printer with hammer mask Small impact printer with hammer mask

1981-03-06

1983-09-06

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101103, 101110, B41J 902

Patent

active

044022611

ABSTRACT:
A printer mask has spaced openings to allow impact therethrough of a hammer against characters arranged in circular columns along a character drum. The distance between the characters and mask changes automatically to compensate for changes in ambient temperature by using mounting materials of selected thermal coefficients of expansion. Uniform printing quality without marring the print paper is achieved with this mask construction.

REFERENCES:
patent: 3414107 (1968-12-01), Sievers
patent: 3874285 (1975-04-01), Kodaira et al.
patent: 3954054 (1976-05-01), Busch
patent: 4250807 (1981-02-01), Kondo et al.
patent: 4311401 (1982-01-01), Hiki et al.
Howard, IBM Tech. Discl. Bulletin, vol. 20, No. 11A, Apr. 1978, pp. 4318-4319.

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