Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1987-10-13
1988-11-01
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9302, 101 9305, 400167, 310328, B41J 312, H01L 4104
Patent
active
047814772
ABSTRACT:
A piezoelectric crystal element is resiliently urged to a home position and drives a plunger member and a print wire in printing operation. Upon rebound movement, the crystal element contacts a step portion of the print head housing to inhibit oscillation of the crystal element more rapidly than oscillation of the plunger member.
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"Institute of Electronics and Communication Engineers of Japan Technical Report", vol. 84, No. 289, EMC 84-49, Feb. 15, 1985.
Hawk Jr. Wilbert
Muckenthaler George J.
NCR Corporation
Sessler Jr. Albert L.
Sewell Paul T.
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