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, 2018
Filed:
Oct. 18, 2016
Mutsuki Morinaga, Kanagawa, JP;
Tadashi Kasai, Duluth, GA (US);
Jun Hitosugi, Tokyo, JP;
Takamasa Ozeki, Kanagawa, JP;
Makoto Yasuda, Kanagawa, JP;
Kunio Hasegawa, Kanagawa, JP;
Emiko Shiraishi, Tokyo, JP;
Hitoshi Yamamoto, Kanagawa, JP;
Masahiko Shakuto, Kanagawa, JP;
Tetsuya Muto, Tokyo, JP;
Keiko Kajimura, Ohta-ku, JP;
Tomoya Ohsugi, Kanagawa, JP;
Mutsuki Morinaga, Kanagawa, JP;
Tadashi Kasai, Duluth, GA (US);
Jun Hitosugi, Tokyo, JP;
Takamasa Ozeki, Kanagawa, JP;
Makoto Yasuda, Kanagawa, JP;
Kunio Hasegawa, Kanagawa, JP;
Emiko Shiraishi, Tokyo, JP;
Hitoshi Yamamoto, Kanagawa, JP;
Masahiko Shakuto, Kanagawa, JP;
Tetsuya Muto, Tokyo, JP;
Keiko Kajimura, Ohta-ku, JP;
Tomoya Ohsugi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a toner pattern bearer to bear a first toner pattern having a first image area and a second toner pattern having a second image area different from the first image area. A toner adhesion amount detector detects a toner adhesion amount of toner of each of the first toner pattern and the second toner pattern. A toner degradation rate calculator calculates a first deviation in the toner adhesion amount of the first toner pattern and a second deviation in the toner adhesion amount of the second toner pattern based on the toner adhesion amount detected by the toner adhesion amount detector. The toner degradation rate calculator compares the first deviation with the second deviation and calculates a toner degradation rate based on a comparison result.