Printer arm

Details Printer arm Printer arm

1982-02-04

1984-07-03

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

044576358

ABSTRACT:
A printer arm for transmitting an impact to a wire stylus in a wire matrix printing head is disclosed. The print arm includes a lever to one end of which the wire stylus is connected. The lever operates in the longitudinal direction of the wire stylus. The lever is a hollow member of a polygonal cross-section and has walls extending substantially in parallel to the direction of operation of the lever. Each of the side wall is provided with at least one through hole for reducing the weight of the lever. The portion of each side wall around each hole is protruded from the other portion of the side wall. This construction effectively suppresses the lateral vibration of the side walls of the lever and to improve the mechanical strength of the lever while reducing the weight of the same.

REFERENCES:
patent: 490235 (1893-01-01), Unz
patent: 1092230 (1914-04-01), Stickney
patent: 3461601 (1969-08-01), Kristiansen
patent: 4136978 (1979-01-01), Bellinger et al.

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