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:
May. 12, 2009
Filed:
Jul. 01, 2003
Tomohiro Nakajima, Tokyo, JP;
Akira Kojima, Chiba, JP;
Ikuko Yamashiro, Kanagawa, JP;
Seizo Suzuki, Kanagawa, JP;
Taku Amada, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Kazuyuki Shimada, Tokyo, JP;
Tomohiro Nakajima, Tokyo, JP;
Akira Kojima, Chiba, JP;
Ikuko Yamashiro, Kanagawa, JP;
Seizo Suzuki, Kanagawa, JP;
Taku Amada, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Kazuyuki Shimada, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical scanner is capable of effectively correcting a difference with respect to the sub-scanning direction between the positions of optical spots for scanning photoconductor drums of a tandem type color image forming apparatus. The optical scanner includes an optical axis adjusting part. The optical axis adjusting part uses a deflecting mirror or a wedge-shaped prism to deflect the optical axis of an optical beam with respect to the sub-scanning direction. As a result, it is possible to accurately correct a resist difference among individual image forming stations and form a high-quality color image without any color displacement.