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:
Nov. 26, 2002
Filed:
Aug. 02, 2000
Applicant:
Inventors:
Satoshi Takezawa, Kawasaki, JP;
Tomoaki Tanaka, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/08 ;
U.S. Cl.
CPC ...
G03G 9/08 ;
Abstract
A non-magnetic one-component developer is provided. This non-magnetic one-component developer includes toner particles and an external additive containing inorganic particles that adhere to the surface of each of the toner particles. In accordance with an emission analysis method utilizing fusion coupling plasma, the rate of free external additive that is determined by the ratio of the number of particles emitting light only from elements of the external additive to one toner particle is 9% or less by number. With such a non-magnetic one-component developer, the external additive will not be welded to the blade of a developing apparatus.