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.:

US 7702261 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 20, 2010

Filed:

Mar. 13, 2006
Applicant:

Yuji Yasuda, Tokyo-to, JP;

Inventor:

Yuji Yasuda, Tokyo-to, JP;

Assignee:

Ricoh Co., Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 15/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A development device includes a developer bearing member including a plurality of magnetic poles for bearing a two component developer, and rotating so that the toner is supplied to a latent image bearing member, a supply and conveyance path including a member configured to convey the developer in a first direction, a regulation member configured to regulate the developer on the developer bearing member, a collection and conveyance path including a member configured to convey the developer in a second direction parallel to the first direction, arranged below the development bearing member and at a substantially same height as the supply and conveyance path, an agitation and conveyance path including a member configured to convey the developer in a third direction opposite to the first direction, arranged at a substantially same height as the collection and conveyance path, and partition members partitioning the three paths.


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Yasuda, Yuji. (2010). Development device and method capable of maintaining toner concentration at constant level without shortening life of developer, process cartridge, and imaging forming apparatus (U.S. Patent No. 7702261). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7702261

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