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:
Oct. 21, 2008
Filed:
May. 25, 2005
Seijirou Ishimaru, Ebina, JP;
Sadaaki Yoshida, Ebina, JP;
Yoshimichi Katagiri, Ebina, JP;
Masahisa Ochiai, Kumagaya, JP;
Seijirou Ishimaru, Ebina, JP;
Sadaaki Yoshida, Ebina, JP;
Yoshimichi Katagiri, Ebina, JP;
Masahisa Ochiai, Kumagaya, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A magnetic black toner for electrophotography comprising a binding resin, a magnetic substance, and a pigment, wherein the pigment is at least one of phthalocyanine pigment and Mn containing hematite, and the content ratio of the magnetic substance and the pigment in the toner satisfy the following formulae: 10≦A≦30, 0.1≦B≦3, 5≦C≦40, wherein A denotes the content ratio (mass %) of the magnetic substance in the toner, B denotes the content ratio (mass %) of the phthalocyanine pigment in the toner, and C denotes the content ratio (mass %) of the Mn containing hematite in the toner.