Matrix printer with piezoelectrically driven printing needles

Details Matrix printer with piezoelectrically driven printing needles Matrix printer with piezoelectrically driven printing needles

1978-01-11

1980-03-18

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 310328, B41J 310

Patent

active

041937031

ABSTRACT:
A matrix printer with piezoelectrically driven printing needles is described in which an electrically controlled piezocrystal arrangement transfers upon its expansion, its change of length to a buckling spring. Coupled to the buckling compression column spring is a printing needle which, upon the deflection of the buckling spring, is driven in the printing direction.

REFERENCES:
patent: 3447455 (1969-06-01), Shneider
patent: 3473466 (1969-10-01), Thayer
patent: 3649857 (1972-03-01), Knappe
patent: 3970184 (1976-07-01), Helmrich et al.
IBM Tech. Disc. Bulletin, W. Sakmann, vol. 20, No. 6, Nov. 1977, p. 2263.

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