Electromagnetic hammer printing device including a limited actio

Details Electromagnetic hammer printing device including a limited actio Electromagnetic hammer printing device including a limited actio

1986-08-14

1987-11-24

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by movement of record-medium against type-face

400167, 101 9329, 101 9348, B41J 938

Patent

active

047085010

ABSTRACT:
An electromagnetic printing hammer device including a permanent magnet having a pair of electromagnetic pole-faces spaced apart from each other by a gap. A hammering element formed of a permanent magnet at least in one portion thereof is located in the gap for movement in a plane parallel to the pole-faces. The hammering element exerts a force of impact on the back of a type as a thrust is applied thereon when a pulse current is passed to the electromagnet and supported by bearings for linear movement in a direction in which it exerts a force of impact.
The features of the hammer device include any one of the followings:

REFERENCES:
patent: 3568593 (1971-03-01), Papadopoulas
patent: 4221163 (1980-09-01), Anderson
patent: 4258371 (1981-03-01), Sekine et al.
patent: 4290356 (1981-09-01), Hehl
patent: 4389131 (1983-06-01), Kondo et al.
patent: 4422784 (1983-12-01), Arzoumanian et al.
patent: 4496253 (1985-01-01), Morsing

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