Invention Grant
- Patent Title: Toner for electrophotography
- Patent Title (中): 电子照相用碳粉
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Application No.: US12578317Application Date: 2009-10-13
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Publication No.: US07862974B2Publication Date: 2011-01-04
- Inventor: Kouji Sugama , Masafumi Uchida , Kenji Yamane , Kenji Hayashi , Ryuji Kitani
- Applicant: Kouji Sugama , Masafumi Uchida , Kenji Yamane , Kenji Hayashi , Ryuji Kitani
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Business Technologies, Inc.
- Current Assignee: Konica Minolta Business Technologies, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2004-012848 20040121
- Main IPC: G03G5/00
- IPC: G03G5/00 ; G03G9/00

Abstract:
An embodiment may be an electrophotographic toner which comprises at least one toner particle which comprises an inner layer and an outer layer covering the inner layer, wherein a cross-sectional area ratio of the outer layer to the inner layer is 0.05-0.46, and wherein a non-uniform thickness exists in the outer layer, and further the average thickness (t) taken at 5 positions as calculated by, is about 0.2—about 1.0 μm, t=(t1+t2+t3+t4+t5)/5 (unit of t1-t5 is μm)wherein t1 represents a thickness of the thickest part of the outer layer, and t2-t5 each represent a thickness of a second to a fifth thickest part of the outer layer in one particle, and wherein a glass transition point Tg of the inner layer is about 2—about 45° C. lower than Tg of the outer layer.
Public/Granted literature
- US20100062362A1 TONER FOR ELECTROPHOTOGRAPHY Public/Granted day:2010-03-11
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