Wire matrix printer with damping means

Details Wire matrix printer with damping means Wire matrix printer with damping means

1984-09-14

1986-09-23

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 101 9302, 400167, B41J 310

Patent

active

046132430

ABSTRACT:
Electromagnetic printing group for a dot matrix printer where the armature movement towards the rest position isdamped by a counterarmature interposed between the armature and a resilient element defining the rest position so that the air cushion interposed between counterarmature and armature provides a first damping action followed by the damping caused by the ballistic impact between armature and counterarmature and finally by the resilient damping of the residual energy of the armature and counterarmature.

REFERENCES:
patent: 3896918 (1975-07-01), Schneider
patent: 4202638 (1980-05-01), Stenudd
patent: 4272748 (1981-06-01), Fugate et al.
patent: 4367962 (1983-01-01), Gaboardi
"Multi-Impact Backstop for Print Hammer"; S. Mitrovich; Xerox Disclosure Journal; vol. 1, No. 4, p. 21; Apr. 1976.
"Impact Printer Missile with Minimal Rebound"; R. Wustrau; IBM Technical Disclosure Journal; vol. 23, No. 7B, p. 3079; Dec. 1980.

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