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. 29, 2012
Filed:
Feb. 25, 2009
Tatsuya Miyadera, Osaka, JP;
Yoshiyuki Shimizu, Hyogo, JP;
Hideyuki Masumoto, Osaka, JP;
Takafumi Miyazaki, Osaka, JP;
Kozo Yamazaki, Hyogo, JP;
Tatsuya Miyadera, Osaka, JP;
Yoshiyuki Shimizu, Hyogo, JP;
Hideyuki Masumoto, Osaka, JP;
Takafumi Miyazaki, Osaka, JP;
Kozo Yamazaki, Hyogo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An exposure unit which exposes photoconductive drums having rotary axes thereof arranged parallel to each other on a single plane by light beams, includes one or more polygon mirrors each having a plurality of reflection surfaces, where the one or more polygon mirrors rotate about a common rotary axis. Each light beam is deflected by the one or more polygon mirrors and scans the surface of a corresponding photoconductive drum. The common rotary axis is separated from the rotary axes of the photoconductive drums by identical distances along respective normals which are perpendicular to both the common rotary axis and the rotary axes of the photoconductive drums.