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:
Sep. 20, 1977
Filed:
Oct. 14, 1975
Applicant:
Inventor:
Kazuaki Tagawa, Tokyo, JA;
Assignee:
Ricoh Company, Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
118653 ; 118655 ; 118658 ; 355 / ;
Abstract
Rotating magnetic poles are arranged so that they set up a strong repulsive force at a particular angular position thereof so that toner particles may be thrown by centrifugal force onto a photoconductive member to perform cascade development. The magnetic poles may be disposed in either one or two cylindrical magnetic brushes. The brushes are arranged so that one of them slidingly contacts the surface of the photoconductive member after the cascade development is completed to perform magnetic brush development.