Printing head for a wire dot printer

Details Printing head for a wire dot printer Printing head for a wire dot printer

1987-08-18

1989-10-03

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 4001572, 400167, 310323, B41J 312

Patent

active

048712710

ABSTRACT:
A printing head for use with an electrodynamic type wire dot printer includes an electrodynamic wire actuator disposed in a magnetic field to be deformed by an electromagnetic force, a printing pin fixedly supported by the electrodynamic wire actuator, and an anti-rebound damping member in cooperation with either the electrodynamic wire actuator or the printing pin. The wire actuator is resiliently deformed so as to give the printing pin a movement between a position wherein the printing pin rests and a position whereat the printing pin hits a platen roller through an ink ribbon and a printing paper wrapped around the platen roller, thereby to print an ink dot on the printing paper. When the printing pin is returned to the rest position, a electric voltage is applied to and, as a result, deforms the anti-rebound damping member to retain either the electrodynamic wire actuator or the printing pin in order to rapidly stop the printing pin at the rest position.

REFERENCES:
patent: 4174182 (1979-11-01), Lendl
patent: 4176976 (1979-12-01), Lendl
patent: 4600322 (1986-07-01), Vermot-Gaud
patent: 4732498 (1988-03-01), Vermot-Gaud
IBM Tech. Disc. Bulletin, by R. Lane, vol. 27, No. 2, Jul. 1984, pp. 1105-1108.

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