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:
Apr. 07, 2015
Filed:
Jan. 18, 2013
Fuji Xerox Co., Ltd., Minato-ku, Tokyo, JP;
Yoshifumi Ozaki, Kanagawa, JP;
Shinji Mitsui, Kanagawa, JP;
Akihiko Noda, Kanagawa, JP;
Masahiro Andoh, Kanagawa, JP;
Hisashi Murase, Kanagawa, JP;
Takafumi Wakai, Kanagawa, JP;
Munenobu Okubo, Kanagawa, JP;
Masaru Sakuma, Kanagawa, JP;
Yasuyuki Tsutsumi, Kanagawa, JP;
Hirokazu Hamano, Kanagawa, JP;
Kazuaki Iikura, Kanagawa, JP;
Yosuke Ninomiya, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A developing device including a toner holding member that faces but is not in contact with an image carrier carrying a latent image and that rotates while holding a nonmagnetic toner, a charging member that charges the toner, and a developing electric field forming unit that forms a developing electric field at least including a direct current component to cause the charged toner to fly and adhere to the latent image to develop the latent image. When the developing electric field is applied such that the toner is caused to fly toward the image carrier by the direct current component of the developing electric field, maintaining a non-electrostatic adhesion of the toner to the toner holding member to be about 2 nN or more under a low-temperature low-humidity environment of a temperature of 10° C. and a relative humidity of 15%. The toner holding member's surface has a specific surface roughness specified by a specific oil retention volume.