Printing head of wire-dot impact printer

Details Printing head of wire-dot impact printer Printing head of wire-dot impact printer

1989-03-15

1991-04-09

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 2295

Patent

active

050059947

ABSTRACT:
A printing head includes a plurality of impact printing wires constituting a dot matrix and a plurality of actuators respectively corresponding to, and for selectively driving the printing members. Each actuator comprises a movable member to which a printing wire is connected, an electro-distortion device, first and second parallel resilient members and an electro-distortion device. The first resilient member is connected with the electro-distortion device between the frame and the movable member and the second resilient member is connected directly between the frame and the movable member so that the extent of longitudinal expansion and contraction of the electro-distortion device, produced by application of an electrical voltage thereto, is enlarged by the movable member and transmitted thereby to the printing wire. A third resilient member is arranged substantially perpendicularly to the first and second resilient members and connects the movable member to the frame.

REFERENCES:
patent: 4136978 (1979-01-01), Bellinger, Jr. et al.
patent: 4435666 (1984-03-01), Fukui

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