Printing apparatus

Details Printing apparatus Printing apparatus

1982-07-30

1984-09-18

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 101 9334, 4001572, B41J 312, B41J 924

Patent

active

044720726

ABSTRACT:
A printing apparatus having a plurality of printing wires or hammers. The printing apparatus has a main drive driven continuously at a resonance frequency so as to supply energy to the plurality of printing wires or hammers, a plurality of selective drives corresponding to the plurality of printing wires or hammers, selectively energized by printing signals so as to transmit the driving energy to the printing wires or hammers. The printer head assembly can be extremely small sized and operate with low energy.

REFERENCES:
patent: 3673955 (1972-07-01), Curtiss et al.
patent: 3715020 (1973-02-01), Nordin
patent: 3830976 (1974-08-01), Taylor
patent: 4174182 (1979-11-01), Lendl
patent: 4264219 (1981-04-01), Arai et al.
patent: 4273039 (1981-06-01), Luo et al.
IBM Tech. Disc. Bulletin, by Applegate, vol. 21, No. 9, Feb. 1979, pp. 3694-3695.

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