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. 16, 2010
Filed:
Jan. 08, 2009
Applicants:
Tetsuo Yamanaka, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Tadashi Shinohara, Kanagawa-ken, JP;
Jun Hosokawa, Tokyo, JP;
Inventors:
Tetsuo Yamanaka, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Tadashi Shinohara, Kanagawa-ken, JP;
Jun Hosokawa, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/00 (2006.01); G03G 15/01 (2006.01);
U.S. Cl.
CPC ...
Abstract
A color image forming apparatus including a plurality of image forming devices, a transfer device including a transfer belt, a test pattern forming device configured to form, on the transfer belt, a test pattern including a plurality of marks formed by the image forming devices, an optical sensor configured to read the plurality of marks, and a checking device configured to determine whether reading by the optical sensor is performed correctly or not.