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:
Sep. 22, 1992
Filed:
Dec. 13, 1989
Yoshikiya Futagawa, Suwa, JP;
Katsuhiko Nishizawa, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A print wire driving apparatus for use in a printer having a stabilized power source, a print wire, an urging coil for driving said print wire and a power source including a smoothing capacitor for energizing the urging coil is provided. An accumulating circuit accumulates electro-magnetic energy generated in the urging coil once the current supplied to the urging coil has been turned OFF. A feedback circuit feeds back energy from the accumulating circuit to the smoothing capacitor when the voltage of the accumulating circuit reaches a predetermined level. A regulating circuit maintains the voltage of the accumulating circuit so that the voltage does not fall below the predetermined level, thereby obtaining high power source efficiency and high speed operation of the print wire.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile