Printing head of the impact type

Details Printing head of the impact type Printing head of the impact type

1989-07-31

1991-01-22

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 2235, B41J 225

Patent

active

049866761

ABSTRACT:
A printing head includes a plurality of printing levers, each having a front end portion and a rear end portion, with each printing lever being rotatable about its rear end portion. An electromagnetic drive is operable to individually drive the printing levers in a driving direction so as to apply a printing force to printing elements operated by the printing levers. Resilient springs operatively associated with the printing levers resiliently apply a return force to each of the printing levers in a return direction opposite to the driving direction. Stopper devices are disposed to be operatively engaged by each of the printing levers upon application of the printing force to thereby preclude contact between each of the printing levers and the electromagnetic drives upon application of the printing force.

REFERENCES:
patent: 4230038 (1980-10-01), Hebert
patent: 4661002 (1987-04-01), Ara
patent: 4822187 (1989-04-01), Gugel
patent: 4832515 (1989-05-01), Kawakami
patent: 4886381 (1989-12-01), Kersey

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