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:
Nov. 06, 2012
Filed:
Sep. 30, 2009
Applicants:
Takanori Aoyama, Miyagi, JP;
Tomoyuki Murakami, Miyagi, JP;
Yukio Kazama, Miyagi, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/435 (2006.01); B41J 2/47 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical scanner unit includes an LD unit, a polygon mirror deflecting a light beam, an optical scan system focusing the light beam from the polygon mirror on a photoconductive drum to form an electrostatic latent image, and a synchronous detector receiving a part of the light beam to detect a write start position on the photoconductive drum in main scan direction. The synchronous detector is fixed on a portion of a housing at predetermined angles in main and sub scan directions relative to an incidence angle of the light beam on the synchronous detector.