Dot matrix print head

Details Dot matrix print head Dot matrix print head

1987-10-13

1988-11-29

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9302, 101 9305, 4001572, 400167, 335257, 310327, B41J 312

Patent

active

047877600

ABSTRACT:
A moving piezoelectric type crystal element drives a print wire in the direction of a platen and against the resilience of return spring and a rebound spring. A voltage pulse is applied through a conductor and across the piezoelectric element to cause displacement or elongation strain thereof to drive the print wire into impact with the platen and upon impact of the print wire a voltage pulse is generated across the piezoelectric element which generated pulse is recovered through the conductor.

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"Institute of Electronics and Communication Engineers of Japan Technical Report", vol. 84, No. 289, EMC 84-49, Feb. 15, 1985.

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