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. 14, 1992
Filed:
Jan. 22, 1991
Meizo Shirose, Hachioji, JP;
Hiroyuki Takagiwa, Hachioji, JP;
Michiaki Ishikawa, Hino, JP;
Yoshiki Nishimori, Hachioji, JP;
Konica Corporation, Tokyo, JP;
Abstract
A developer for electrophotography is disclosed. The developer comprises a carrier comprising magnetic particles being coated with a fluororesin in which an alkali salt of a fatty acid is contained in an amount of from 0.05 to 0.5% by weight of said carrier, and a toner comprising a colored particle comprising a colorant and a reaction product of a styrene-acryl copolymer having carboxyl groups with a multivalent metal compound, and an inorganic particle containing an ammonium salt-modified polysiloxane. The developer is excellent in the reproducibility of fine line, the density uniformity of solid image and the fine line-reproducibility in copies formed by successive generations and the durability.