Piezo-electric actuating element for recording heads

Details Piezo-electric actuating element for recording heads Piezo-electric actuating element for recording heads

1976-07-06

1980-09-23

Pieprz, William

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

346140R, 310369, H01V 700, B41J 304

Patent

active

042239982

ABSTRACT:
A cylindrical tubular piezo-electric actuating element for recording heads, particularly in mosaic-type recording equipment in which a recording ink or fluid, contained in a compression chamber surrounded by the cylindrical actuating element, is forced out in droplets by piezo-electric constriction of the actuating element, the latter having dimensions which are such that the quotient derived from the wall thickness and the arithmetic mean of the internal and external diameters of the element matches the Poisson number (.mu.) of the piezo-electric material employed, whereby maximum constriction of the internal diameter is effected with no change in the external diameter of the actuating element.

REFERENCES:
patent: 3683212 (1972-08-01), Zaltan
patent: 3832579 (1974-08-01), Arndt
patent: 3848118 (1974-11-01), Rittberg
patent: 3891872 (1975-06-01), Nagata et al.
"IRE Standards on Piezoelectric Crystals," Proceedings of the Institute of Radio Engineers, vol. 49, 7/61, p. 1161.

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