发明名称 External additive for toner, toner covered with external additive, development agent, toner container, and image forming apparatus
摘要 An external additive for toner that contains a resin particle and two or more kinds of particulates having different compositions present on the resin particle.
申请公布号 US9182695(B2) 申请公布日期 2015.11.10
申请号 US201314059603 申请日期 2013.10.22
申请人 Ricoh Company, Ltd. 发明人 Ishii Masayuki
分类号 G03G9/097;G03G9/087 主分类号 G03G9/097
代理机构 Oblon, McClelland, Maier & Neustadt, L.L.P. 代理人 Oblon, McClelland, Maier & Neustadt, L.L.P.
主权项 1. A toner, comprising: a mother toner particle comprising a binder resin; and an external additive for toner consisting of a resin particle and a plurality of metal oxide particulates comprising different compositions present on the resin particle, wherein the external additive for toner is present on the mother toner particle, and the plurality of metal oxide particulates uniformly covers a surface of the resin particle with a single layer.
地址 Tokyo JP