Invention Grant
- Patent Title: Magnetic toner
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Application No.: US15229634Application Date: 2016-08-05
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Publication No.: US09658548B2Publication Date: 2017-05-23
- Inventor: Michihisa Magome , Tadashi Dojo , Yusuke Hasegawa
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick Cella Harper and Scinto
- Priority: JP2011-286202 20111227
- Main IPC: G03G9/083
- IPC: G03G9/083 ; G03G9/08 ; G03G9/097

Abstract:
The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on the coverage ratio A, a ratio of the coverage ratio B to the coverage ratio A, and a compression ratio in a specific range.
Public/Granted literature
- US20160342100A1 MAGNETIC TONER Public/Granted day:2016-11-24
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