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:
Oct. 12, 2010
Filed:
May. 31, 2005
Kazunori Shigemori, Tokyo, JP;
Muneharu Ito, Tokyo, JP;
Toshiyuki Nagai, Osaka, JP;
Toshiro Murano, Yamanashi, JP;
Fuminori Tsuruta, Yamanashi, JP;
Tomoharu Takeuchi, Saitama, JP;
Masahiro Ikeda, Saitama, JP;
Sokuei Motoda, Saitama, JP;
Kazunori Shigemori, Tokyo, JP;
Muneharu Ito, Tokyo, JP;
Toshiyuki Nagai, Osaka, JP;
Toshiro Murano, Yamanashi, JP;
Fuminori Tsuruta, Yamanashi, JP;
Tomoharu Takeuchi, Saitama, JP;
Masahiro Ikeda, Saitama, JP;
Sokuei Motoda, Saitama, JP;
Zeon Corporation, Tokyo, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Yamanashi Electronics Co., Ltd., Yamanashi, JP;
Shin-Etsu Polymer Co., Ltd., Tokyo, JP;
Abstract
In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 μm, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of −15 to 10° C. and a width at half maximum of at least 25° C. in viscoelasticity tan δ, the toner has a volume average particle diameter of 4 to 10 μm and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 μC/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.