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:
Oct. 29, 2013
Filed:
Feb. 05, 2010
Yasuo Miyoshi, Yokohama, JP;
Norio Kudo, Kawasaki, JP;
Yoshihiro Fujiwara, Yokohama, JP;
Tsukuru Kai, Fujisawa, JP;
Hiroshi Hosokawa, Yokohama, JP;
Hiroaki Okamoto, Zama, JP;
Yasuo Miyoshi, Yokohama, JP;
Norio Kudo, Kawasaki, JP;
Yoshihiro Fujiwara, Yokohama, JP;
Tsukuru Kai, Fujisawa, JP;
Hiroshi Hosokawa, Yokohama, JP;
Hiroaki Okamoto, Zama, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier.