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:
Jun. 05, 2012
Filed:
Dec. 12, 2008
Tatsuya Miyadera, Osaka, JP;
Kenji Asuwa, Kanagawa, JP;
Izumi Kinoshita, Hyogo, JP;
Hiroaki Ikeda, Osaka, JP;
Tatsuya Ozaki, Osaka, JP;
Yasuo Matsuyama, Hyogo, JP;
Hirokazu Iwata, Kanagawa, JP;
Tatsuya Miyadera, Osaka, JP;
Kenji Asuwa, Kanagawa, JP;
Izumi Kinoshita, Hyogo, JP;
Hiroaki Ikeda, Osaka, JP;
Tatsuya Ozaki, Osaka, JP;
Yasuo Matsuyama, Hyogo, JP;
Hirokazu Iwata, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A positional error detection method forms, on a belt which is transported in a transport direction, positional error detection marks for detecting a positional error between image positions of first and second colors, detects the positional error detection marks on the belt, and computes the positional error based on the detected positional error detection marks. The positional error detection marks include first and second marks which are inclined in mutually opposite directions with respect to the transport direction, and third marks which are perpendicular to the transport direction.