Invention Grant
- Patent Title: Magnetic toner
- Patent Title (中): 磁性调色剂
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Application No.: US12272976Application Date: 2008-11-18
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Publication No.: US07935467B2Publication Date: 2011-05-03
- Inventor: Tadashi Dojo , Michihisa Magome , Eriko Yanase , Takashi Matsui , Tomohisa Sano , Akira Sakakibara , Shuichi Hiroko
- Applicant: Tadashi Dojo , Michihisa Magome , Eriko Yanase , Takashi Matsui , Tomohisa Sano , Akira Sakakibara , Shuichi Hiroko
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2007-301428 20071121
- Main IPC: G03G15/01
- IPC: G03G15/01

Abstract:
In a magnetic toner which has magnetic toner base particles containing at least a binder resin and a magnetic material, and an inorganic fine powder, (i) the magnetic toner has an average circularity of from 0.950 or more to 1.000 or less, (ii) the magnetic toner has a compressibility of 30 or less, and (iii) the magnetic toner contains boron nitride particles having a median diameter (D50) of from 0.5 μm or more to 8.0 μm or less, as the inorganic fine powder in an amount of from 0.05 part by mass or more to 1.00 part by mass or less based on 100 parts by mass of the magnetic toner base particles. This provides a magnetic toner with which stable image density can be achieved without regard to service environment and which do not cause any image defects such as fog.
Public/Granted literature
- US20090130580A1 MAGNETIC TONER Public/Granted day:2009-05-21
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