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. 17, 2009
Filed:
Oct. 24, 2006
Kouichi Sugama, Hachioji, JP;
Nobuaki Kobayashi, Hachioji, JP;
Takeo Oshiba, Hachioji, JP;
Okushi Okuyama, Hachioji, JP;
Satoshi Uchino, Hachioji, JP;
Kouichi Sugama, Hachioji, JP;
Nobuaki Kobayashi, Hachioji, JP;
Takeo Oshiba, Hachioji, JP;
Okushi Okuyama, Hachioji, JP;
Satoshi Uchino, Hachioji, JP;
Abstract
Provided are a developing roller for non-magnetic single component development and a developing method employing the developing, by which toner can be stably conveyed in any external environment, and the stable toner conveyance and charging amount can also be acquired. Also disclosed is a developing roller possessing a spindle and provided around an outer circumference of the spindle, at least an elastic layer (innermost layer), a resistance adjusting layer (intermediate layer) formed on the elastic layer and a surface layer (outermost layer) formed on the resistance adjusting layer, wherein the intermediate layer possesses a layer containing carbon black in a resin, a content of a polycyclic aromatic hydrocarbon in the carbon black is at most 10 ppm, and a volume resistance (Rv) of all the layers provided around the outer circumference of the spindle is 1.0×10−1.0×10Ω·cm.