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:
Sep. 01, 2015
Filed:
Dec. 16, 2014
Kyocera Document Solutions Inc., Osaka-shi, Osaka, JP;
Tamotsu Shimizu, Osaka, JP;
Yuji Kamiyama, Osaka, JP;
Akihiro Watanabe, Osaka, JP;
Yoshinobu Yoneima, Osaka, JP;
Shizuka Okada, Osaka, JP;
Sakae Saito, Osaka, JP;
Yasuhiro Oishi, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka-shi, JP;
Abstract
A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes a resin coat layer that is formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being made of a resin material and having electric conductivity. An AC impedance Z obtained from an application of an AC voltage at a frequency in a range from 0.05 Hz to 100 Hz is equal to or higher than 100Ω, and a phase angle θ satisfies a relationship of 0 rad<θ<0.1 rad when a power factor is cos θ=Za/Z.