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. 22, 1997
Filed:
Oct. 26, 1995
Applicant:
Inventors:
Eiji Takenaka, Isehara, JP;
Yozo Matsuura, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
399281 ;
Abstract
In a developing device for an electrophotographic image forming apparatus, a toner conveyor roller intervenes between a conveyor roller and a developing region where a photoconductive element is located. A toner is electrically transferred from the conveyor roller to the toner conveyor roller and conveyed by the toner conveyor roller to the developing region. This prevents inversely charged toner particles from being brought to the developing region, thereby insuring high quality development.