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. 08, 2011
Filed:
Mar. 12, 2008
Mitsuyo Matsumoto, Ibaraki, JP;
Chiyoshi Nozaki, Otsu, JP;
Takuya Kadota, Kobe, JP;
Katsunori Kurose, Takarazuka, JP;
Tsuyoshi Nozaki, Ikeda, JP;
Atsushi Yamamoto, Kawanishi, JP;
Yoshimichi Ishikawa, Itami, JP;
Mitsuyo Matsumoto, Ibaraki, JP;
Chiyoshi Nozaki, Otsu, JP;
Takuya Kadota, Kobe, JP;
Katsunori Kurose, Takarazuka, JP;
Tsuyoshi Nozaki, Ikeda, JP;
Atsushi Yamamoto, Kawanishi, JP;
Yoshimichi Ishikawa, Itami, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus having at least a latent electrostatic image bearing member, and a recharging unit configured to recharge a residual toner remaining on the latent electrostatic image bearing member, wherein after transfer, the residual toner is passed through the recharging unit and is then recovered in a developing device; a charging component of the recharging unit that comes into contact with the latent electrostatic image bearing member is a polymer sheet having a surface roughness (Ra) of 0.12 μm to 0.51 μm; the toner contains at least a pigment, a binder resin, and a releasing agent, and contains inorganic fine particles as an external additive, and the amount of the inorganic fine particles and the amount of the releasing agent satisfy three specific Expressions.