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:
Dec. 01, 2015
Filed:
Apr. 25, 2014
Applicant:
Kyocera Document Solutions Inc., Osaka-shi, Osaka, JP;
Inventor:
Seiji Kikushima, Osaka, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/087 (2006.01); G03G 9/08 (2006.01); G03G 9/097 (2006.01);
U.S. Cl.
CPC ...
G03G 9/0804 (2013.01); G03G 9/08711 (2013.01); G03G 9/08791 (2013.01); G03G 9/09741 (2013.01);
Abstract
A positively chargeable toner for electrostatic image development according to the present disclosure is formed by aggregating at least binder resin-containing fine particles and colorant-containing fine particles in an aqueous medium in the presence of a dispersing agent and a metal ion to form fine particle aggregates and heating the fine particle aggregates to coalesce components in the fine particle aggregates. The binder resin used is a (meth)acrylic resin or styrene-(meth)acrylic resin having a certain quaternary ammonium group. The hydrophobicity (methanol wettability) is adjusted to a certain range.