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. 27, 2005
Filed:
Dec. 03, 2003
Toshiyuki Andoh, Kanagawa, JP;
Hiromichi Matsuda, Kanagawa, JP;
Makoto Komatsu, Kanagawa, JP;
Tadashi Shinohara, Kanagawa, JP;
Yuuji Matsuda, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Nobuto Yokokawa, Saitama, JP;
Masato Yokoyama, Kanagawa, JP;
Yohhei Miura, Chiba, JP;
Toshiyuki Takahashi, Kanagawa, JP;
Jun Hosokawa, Tokyo, JP;
Toshiyuki Andoh, Kanagawa, JP;
Hiromichi Matsuda, Kanagawa, JP;
Makoto Komatsu, Kanagawa, JP;
Tadashi Shinohara, Kanagawa, JP;
Yuuji Matsuda, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Nobuto Yokokawa, Saitama, JP;
Masato Yokoyama, Kanagawa, JP;
Yohhei Miura, Chiba, JP;
Toshiyuki Takahashi, Kanagawa, JP;
Jun Hosokawa, Tokyo, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A drive control method includes detecting an angular displacement of a rotor driven by a pulse motor, calculating a difference between the detected angular displacement and a preset target value of the angular displacement, and calculating a drive pulse frequency of a drive pulse signal used to drive the pulse motor. The pulse motor is driven by the drive pulse signal having the drive pulse frequency to allow the rotor at a constant angular velocity.