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:
Jan. 13, 1981
Filed:
Feb. 01, 1979
Masahiko Mori, Shiojiri, JP;
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Abstract
In a dot printer head, a small, thin and flat lever or chip pivots on a fulcrum when attracted by an electromagnetic coil. Pivoting of the chip on the fulcrum drives a needle, in opposition to a biasing spring, against an ink ribbon and paper for printing on the paper with dots. The biasing spring returns the needle after printing. The fulcrum is positioned by a resilient restraint comprising a leaf spring. The magnetic gap between the coil and chip is small but provides a long needle stroke because of the mechanical advantage in the pivoting element. The gap requires no adjustments. The printer head includes a plurality of similar independently operating needles and drive mechanisms.