Printing mechanism for dot matrix printers

Details Printing mechanism for dot matrix printers Printing mechanism for dot matrix printers

1985-01-02

1986-09-23

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400124, 400176, 400179, 101 9305, B41J 312, B41J 2324

Patent

active

046132414

ABSTRACT:
A dot-type printer of the type using printing pins or wires is improved by employing a driving system which includes a variable-volume sealed container enclosing a pressure transmitting medium. Electrodes are disposed in the medium and are closely spaced such that the application of a high voltage will cause arc discharge across the same. The discharge energy applied to the medium causes an expansion of the medium, which in turn causes an expansion of the sealed container. The printing pins or wires are abutted against a movable membrane or bellows portion of the container, so that container expansion effects linear movement of the pins or wires.

REFERENCES:
patent: 3405793 (1968-10-01), Stuiber
patent: 3640214 (1972-02-01), Scheinhutte
patent: 4021818 (1977-05-01), Van Vloten
patent: 4027762 (1977-06-01), Nakauchi
patent: 4272200 (1981-06-01), Hehl
patent: 4503445 (1985-03-01), Fridman

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