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:
Apr. 16, 2013
Filed:
Oct. 30, 2006
Hiroyuki Tsugaru, Saitama, JP;
Gen Matsushima, Tokyo, JP;
Hiroyuki Tsugaru, Saitama, JP;
Gen Matsushima, Tokyo, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
In speed control that is performed within a single operating cycle of a printer, three-level control of ON control, OFF control, and chopper control, is performed in place of the two-level control of ON control and OFF control, to effectively suppress speed variations due to load variations within a single operating cycle, even in small printers provided with DC motors having small output torques. In a printer comprising a DC motor, a paper feeding unitthat includes a paper feeding roller that uses the DC motor as the driving source, and a printing mechanism unit, for printing, in use of the printing mechanism unit, onto paper that is advanced by a specific amount by the paper feeding unit, an encoderfor outputting pulse signals according to the rotation of the DC motoris provided. The encoderis provided with a pulse forming region for forming a pulsed signal, on the periphery of an encoder plate, where this pulse forming region is provided with a non-uniform spacing region in a section within a uniform spacing region.