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    • 3. 发明申请
    • DEVELOPING APPARATUS, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND TONER
    • 开发设备,图像形成设备,图像形成方法和调色剂
    • US20100239328A1
    • 2010-09-23
    • US12722338
    • 2010-03-11
    • Yoichi YAMADATomohiro ARUGADaisuke MATSUMOTOYoshio NAKAZAWA
    • Yoichi YAMADATomohiro ARUGADaisuke MATSUMOTOYoshio NAKAZAWA
    • G03G15/08G03G9/00
    • G03G15/0812G03G9/09708G03G9/09716G03G9/09725G03G2215/0177
    • A developing apparatus includes: a housing which contains toner; a toner supporting roller; and a regulating blade, wherein bias voltage is applied to the regulating blade, the toner includes, an insulating external additive and an electrically-conductive external additive, satisfies any of the following first to third conditions, the first condition: a volume average grain diameter of the electrically-conductive external additive is larger than a volume average grain diameter of the insulating external additive, the second condition: a volume average grain diameter of the electrically-conductive external additive is larger than a volume average grain diameter of the insulating external additive in which coverage in the toner is higher than that of the electrically-conductive external additive, and the third condition: coverage of the electrically-conductive external additive in the toner is higher than coverage of the insulating external additive that is larger in volume average grain diameter than the electrically-conductive external additive.
    • 显影装置包括:容纳调色剂的壳体; 调色剂支撑辊; 以及调节叶片,其中偏置电压施加到调节叶片,调色剂包括绝缘外部添加剂和导电外部添加剂,满足以下第一至第三条件中的任何一个,第一条件:体积平均粒径 导电性外部添加剂的体积平均粒径大于绝缘性外部添加剂的体积平均粒径,第二条件:导电性外部添加剂的体积平均粒径大于绝缘性外部添加剂的体积平均粒径 其中调色剂中的覆盖率高于导电外部添加剂的覆盖率,第三条件是:调色剂中的导电外部添加剂的覆盖率高于体积平均颗粒中较大的绝缘外部添加剂的覆盖 直径比导电外添加剂。