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:
Apr. 07, 2009
Filed:
Nov. 17, 2006
Kayoko Tanaka, Tokyo, JP;
Kohta Fujimori, Kanagawa, JP;
Yuji Hirayama, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Shin Hasegawa, Kanagawa, JP;
Shinji Kato, Kanagawa, JP;
Takashi Enami, Kanagawa, JP;
Kazumi Kobayashi, Tokyo, JP;
Kiichirou Shimizu, Kanagawa, JP;
Kayoko Tanaka, Tokyo, JP;
Kohta Fujimori, Kanagawa, JP;
Yuji Hirayama, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Shin Hasegawa, Kanagawa, JP;
Shinji Kato, Kanagawa, JP;
Takashi Enami, Kanagawa, JP;
Kazumi Kobayashi, Tokyo, JP;
Kiichirou Shimizu, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image density control method for an image forming apparatus in which, in order to keep the development capability constant over time, the toner density in the developer is manipulated to an appropriate range by changing the toner density control reference value in accordance with the toner replacement amount in a fixed time period by ascertaining changes in the image coverage of the output images, and by changing the image forming conditions at predetermined execution intervals.