Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Toner
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.
Ricoh Company, Ltd.
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Hiroshi Junichi Satoshi Tsuneyasu Osamu Masaki Takahiro
Yamashita Awamura Ogawa Nagatomo Uchinokura Watanabe Honda