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:
Jan. 18, 2011
Filed:
Aug. 05, 2008
Kazuoki Fuwa, Kawanishi, JP;
Masayuki Hagi, Minoo, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Hideaki Yasunaga, Ibaragi, JP;
Hiroaki Katoh, Nagaokakyo, JP;
Yoshitaka Sekiguchi, Nishinomiya, JP;
Satoshi Ogawa, Nara, JP;
Kazuoki Fuwa, Kawanishi, JP;
Masayuki Hagi, Minoo, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Hideaki Yasunaga, Ibaragi, JP;
Hiroaki Katoh, Nagaokakyo, JP;
Yoshitaka Sekiguchi, Nishinomiya, JP;
Satoshi Ogawa, Nara, JP;
Ricoh Company Limited, Tokyo, JP;
Abstract
A single component development device including a toner including a resin, a coloring agent, a wax, a charge control agent and an inorganic particulate, a development roller to bear the toner on the surface of the development roller and transfer the toner to an image bearing member and a thin layer forming member to regulate a thickness of the layer of the toner while in contact with the surface of the development roller via the toner borne thereon, wherein a regulating pressure A between the thin layer forming member and the development roller is from 25 to 60 (N/m), a content Z (weight %) of the charge control agent satisfies the following relationship (1) and an average dispersion particle diameter D (nm) of the charge control agent satisfies the following relationship (2):0.029×−0.150>>0.013×−0.013  Relationship (1)<6.3×−106.3  Relationship (2).