Technique for improving the wear resistance of a wire matrix pri

Details Technique for improving the wear resistance of a wire matrix pri Technique for improving the wear resistance of a wire matrix pri

1987-08-21

1989-03-14

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 335270, B41J 312

Patent

active

048120618

ABSTRACT:
A printing head comprises a plurality of printing wires, a plurality of armatures connected at their tips to the base ends of the printing wires, an armature supporting member for rotatably supporting the plurality of armatures so that the tips of the armatures are movable in the longitudinal direction of the printing wires, a reciprocable drive unit for driving the plurality of armatures to reciprocate the plurality of printing wires between a projected position and a drawn position in the longitudinal direction of the plurality of printing wires, and wear resistant chips mounted on the rotatably supporting portions of the plurality of armatures on the armature supporting member.

REFERENCES:
patent: 3889793 (1975-06-01), Cattaneo
patent: 4037532 (1977-07-01), Plaza et al.
patent: 4653943 (1987-03-01), Sakaida et al.
Patent Abstracts of Japan, vol. 8, No. 158 (M-311)[1595], 21st Jul. 1984; & JP -A-59 52667(Nippon Denki K.K.) 27-03-1984.

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