Actuator for dot matrix printhead

Details Actuator for dot matrix printhead Actuator for dot matrix printhead

1985-12-09

1987-01-06

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9302, 101 9305, 101 9348, 400167, 400686, B41J 312, B41J 942

Patent

active

046343032

ABSTRACT:
An improved dot matrix actuator is provided which includes a magnetic circuit formed of a yoke assembly and a pivotal armature. The armature is pivotally supported with respect to the yoke by means of a flexure assembly which eliminates the need for a true pivot between the two elements. The elements are shaped so as to maintain a constant small air gap therebetween so as to maximize the magnetic efficiency of the device while eliminating wear. The device is operated just below saturation of the magnetic circuit in order to maximize efficiency. In addition, the actuator includes several features for maximizing its speed and operational efficiency.

REFERENCES:
patent: 3889793 (1975-06-01), Cattaneo
patent: 4407591 (1983-10-01), Adamoli
IBM Tech. Disc. Bulletin, by D. A. Hall, vol. 22, No. 8B, Jan., 1980, p. 3498.

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