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:
Oct. 05, 1999
Filed:
Apr. 09, 1997
Applicant:
Inventor:
Atsushi Otani, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318365 ; 346134 ; 347104 ; 347139 ;
Abstract
An apparatus for controlling a stepping motor used in feeding a sheet, for example, in a facsimile device, includes a driving unit for driving a stepping motor, and an controller for controlling the drive unit, depending upon drive conditions of the stepping motor, to control at least one of the excitation method and the drive current of the stepping motor, thereby suppressing the generation of heat upon stopping of the motor, and stabilizing the rotation thereof.