Cross hammer type printer head

Details Cross hammer type printer head Cross hammer type printer head

1982-05-19

1984-09-04

Burr, Edgar S.

Printing

Selective or progressive

Bed and platen machines

101 9304, B41J 902

Patent

active

044690231

ABSTRACT:
A cross hammer type dot printer comprises a rotary drum having an outer peripheral surface formed with a plurality of projections extending along its longitudinal axis, and a printer head disposed in front of the drum and movable in a direction which is perpendicular to the direction in which a recording medium is fed. The printer head faces the drum in a way in which it substantially crosses the projections on the drum, and includes an electromagnetically operable printing hammer. The projections are displaceable vertically relative to the printing hammer upon rotation of the drum, while the printing hammer is horizontally displaceable relative to the projections upon movement of the printer head, so that when the hammer strikes against the projections, dots are printed where they cross each other. The printer head of this invention is suitable for use in such a cross hammer type dot printer. It can be made of a small number of parts, and is small.

REFERENCES:
patent: 3748613 (1973-07-01), Venrer
patent: 3804008 (1974-04-01), Hoyer
patent: 3810195 (1974-05-01), Kilroy et al.
patent: 3968867 (1976-07-01), Stenudd
patent: 4224589 (1980-09-01), Tamulis
patent: 4351235 (1982-09-01), Bringhurst
patent: 4362405 (1982-12-01), Ikeda

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