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:
Mar. 17, 2015
Filed:
Mar. 15, 2013
Atsufumi Omori, Kanagawa, JP;
Masaaki Ishida, Kanagawa, JP;
Kazuhiro Akatsu, Kanagawa, JP;
Muneaki Iwata, Kanagawa, JP;
Hayato Fujita, Kanagawa, JP;
Atsufumi Omori, Kanagawa, JP;
Masaaki Ishida, Kanagawa, JP;
Kazuhiro Akatsu, Kanagawa, JP;
Muneaki Iwata, Kanagawa, JP;
Hayato Fujita, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus is disclosed, including a light source; a drum; an optical scanning apparatus; and an endless belt. The image forming apparatus further includes a pattern forming unit which forms, on the endless belt along a conveying direction of the endless belt, a density fluctuation detecting pattern having a period; a density sensor which detects the density fluctuating detecting pattern and outputs a density signal including information on density fluctuations in the conveying direction of the endless belt; and a period detecting sensor which detects the period included in the density fluctuations.