Invention Grant
- Patent Title: Toner
- Patent Title (中): 爽肤水
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Application No.: US13666332Application Date: 2012-11-01
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Publication No.: US08614043B2Publication Date: 2013-12-24
- Inventor: Masaki Watanabe , Osamu Uchinokura , Junichi Awamura , Takahiro Honda , Satoshi Ogawa , Tsuneyasu Nagatomo , Hiroshi Yamashita
- Applicant: Masaki Watanabe , Osamu Uchinokura , Junichi Awamura , Takahiro Honda , Satoshi Ogawa , Tsuneyasu Nagatomo , Hiroshi Yamashita
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-253837 20111121
- Main IPC: G03G9/087
- IPC: G03G9/087

Abstract:
A toner including a core particle, an inner shell layer covering the core, and an outer shell layer covering the inner shell layer is provided. The core particle includes a resin P. The inner shell layer includes fine particles of a resin A. The outer shell layer includes fine particles of a resin B. The toner satisfies the following formulae (1) to (3): 4.5≦T½(P)−Tfb(P)≦14 (1) 20≦T½(A)−Tfb(A)≦40 (2) 23.5≦T½(B)−Tfb(B)≦40 (3) wherein T½(P), T½(A), and T½(B) represent ½ method temperatures of the resins P, A, and B, respectively, and Tfb(P), Tfb(A), and Tfb(B) represent flow beginning temperatures of the resins P, A, and B, respectively, and wherein the ½ method temperatures and the flow beginning temperatures are measured by a flowtester.
Public/Granted literature
- US20130130171A1 TONER Public/Granted day:2013-05-23
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