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. 28, 2009
Filed:
Mar. 08, 2006
Masaaki Yamada, Tokyo, JP;
Masanori Horike, Yokohama, JP;
Yohichiroh Miyaguchi, Yokohama, JP;
Nobuaki Kondoh, Yokohama, JP;
Yoshinori Nakagawa, Yokohama, JP;
Masaaki Yamada, Tokyo, JP;
Masanori Horike, Yokohama, JP;
Yohichiroh Miyaguchi, Yokohama, JP;
Nobuaki Kondoh, Yokohama, JP;
Yoshinori Nakagawa, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Development device includes an electrostatic conveyance device, a supply device, and a collection device. The electrostatic conveyance device moves toner on a surface thereof in a toner conveyance direction by a phase-shifting electric field. The surface has upstream and downstream side ends where the phase-shifting electric field starts and ends, respectively. The supply device opposes the upstream side end to supply the toner onto the electrostatic conveyance surface. The toner supplied by the supply device onto the electrostatic conveyance surface is moved by the phase-shifting electric field to a development area of the electrostatic conveyance device opposing an image bearing. The collection device opposes the downstream side end and collects the toner moved on the electrostatic conveyance surface to a downstream side of the development area of the electrostatic conveyance device in the toner conveyance direction without contributing to the development.