Wire matrix print head apparatus

Details Wire matrix print head apparatus Wire matrix print head apparatus

1985-01-28

1985-12-31

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

045617902

ABSTRACT:
The invention is a magnetically actuated clapper-style armature wire matrix print head. A light weight highly reliable and low cost design is achieved by utilizing single molded parts wherever possible. A unitary molded straight line channel wire matrix wire guide is molded as a single part. The flux return member is a single formed part with attached magnetic cores. The magnetic cores have thermal contact with an attached or integral heat sink that extend from the flux return member in the axial direction with the cores and which may be integrated with the support frame for the print head structure. A rebound absorbing backstop member receives the armatures on the rebound but also serves as a means of maintaining pivotal contact between the end of the armatures and the top edge of the flux return member so that a continuous flux path from the flux return member, through the armature and down through the cores of the electromagnets can be attained.

REFERENCES:
patent: 3770092 (1973-11-01), Grim
patent: 3828908 (1974-08-01), Schneider
patent: 3893220 (1975-07-01), Bittner
patent: 3896918 (1975-07-01), Schneider
patent: 3929214 (1975-12-01), Hebert
patent: 4009772 (1977-03-01), Glaser et al.
patent: 4375338 (1983-03-01), Mitsuishi
patent: 4401392 (1983-08-01), Blomquist et al.

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