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:
Mar. 01, 2011
Filed:
Mar. 20, 2006
Masashi Yamazaki, Yokohama, JP;
Shinobu Hasegawa, Yokohama, JP;
Masashi Yamazaki, Yokohama, JP;
Shinobu Hasegawa, Yokohama, JP;
Synztec Co., Ltd., Tokyo, JP;
Abstract
To provide a conductive roller which does not cause defective images with, for example, black lines, which would otherwise be caused by current leakage due to aggregation of carbon black particles or a similar phenomenon, and a method for inspecting the roller. The conductive roller having a metallic core and at least one rubber elastic layer provided on the outer peripheral surface of the core, the rubber elastic layer being formed from a conductive rubber which has ion conductivity and which contains carbon black micropowder, characterized in that said rubber elastic layer satisfies the relationship represented by the following formula:|θ/θ|≦5,  [F1]wherein θrepresents the maximum value of phase difference θ as measured upon application of an AC voltage of 1.0 V within a frequency range of 100 mHz to 10 kHz, and θrepresents the minimum value of phase difference θ as measured under the same conditions.