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:
Feb. 29, 2000
Filed:
Jul. 14, 1997
Toshiyuki Andoh, Kanagawa, JP;
Mikio Kamoshita, Tokyo, JP;
Minoru Takahashi, Kanagawa, JP;
Tomiko Takahashi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An original image reading apparatus comprises an exposure optical system including a scanner optical system which can perform go and return operations, a scanner driving motor which drives said scanner optical system, velocity detecting means for detecting a moving velocity of said scanner optical system and position detecting means for detecting the position of said scanner optical system. In the apparatus, return control is performed which is control of returning said scanner optical system after an original image reading scan has been finished. A target velocity is calculated from a residual distance from a current position of said scanner optical system to a target reference position. Target acceleration is used as feedforward. Velocity control is performed so that detected velocity follows the target velocity.