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:
Jul. 31, 2012
Filed:
Jun. 11, 2009
Akira Yoshida, Kanagawa, JP;
Shin Hasegawa, Kanagawa, JP;
Hitoshi Ishibashi, Kanagawa, JP;
Yoshiaki Miyashita, Tokyo, JP;
Kohta Fujimori, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Shuji Hirai, Tokyo, JP;
Kayoko Tanaka, Tokyo, JP;
Yushi Hirayama, Kanagawa, JP;
Tetsuya Muto, Kanagawa, JP;
Akira Yoshida, Kanagawa, JP;
Shin Hasegawa, Kanagawa, JP;
Hitoshi Ishibashi, Kanagawa, JP;
Yoshiaki Miyashita, Tokyo, JP;
Kohta Fujimori, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Shuji Hirai, Tokyo, JP;
Kayoko Tanaka, Tokyo, JP;
Yushi Hirayama, Kanagawa, JP;
Tetsuya Muto, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
An image forming apparatus forms a plurality of tone patterns of different colors, each of which containing a plurality of toner patches having different toner densities. Some of the toner patches in each of the tone patterns are formed with a predetermined fixed developing bias and the rest of the toner patches in each of the tone patterns are formed with developing biases set based on previous developing biases that have been obtained through a previous control process. The largest toner density of the toner patches in each of the tone patterns is determined based on a magnitude relation of previous index values obtained through the previous control process.