The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 1984
Filed:
Feb. 04, 1982
Hitachi, Ltd., Tokyo, JP;
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.