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    Developing apparatus and electrophotographic image-forming apparatus
    7.
    发明授权
    Developing apparatus and electrophotographic image-forming apparatus 有权
    显影装置和电子照相成像装置

    公开(公告)号：US07796926B2

    公开(公告)日：2010-09-14

    申请号：US12486273

    申请日：2009-06-17

    申请人： Takuma Matsuda ,  Masayoshi Shimamura ,  Yasutaka Akashi ,  Satoshi Otake ,  Minoru Ito ,  Kazuhito Wakabayashi ,  Daisuke Yoshiba

    发明人： Takuma Matsuda ,  Masayoshi Shimamura ,  Yasutaka Akashi ,  Satoshi Otake ,  Minoru Ito ,  Kazuhito Wakabayashi ,  Daisuke Yoshiba

    IPC分类号： G03G15/08

    CPC分类号： G03G9/0833 ,  G03G9/0835 ,  G03G2215/0609

    摘要： A developing apparatus is provided which can suppress a fluctuation in image density in a discontinuous printing mode provided with a pause period. The developing apparatus includes a developer for developing an electrostatic latent image on a photosensitive drum, a developer bearing member for carrying and conveying the developer and a developer layer thickness-regulating unit placed close to the developer bearing member for regulating the amount of the developer carried and conveyed by the developer bearing member, the developer layer thickness-regulating unit being. As the developer, a negatively chargeable, one-component, magnetic toner is used having magnetic toner particles containing a binder resin and a magnetic iron oxide particle, and has a specific saturation magnetization, specific weight-average particle diameter and specific composition. The developer bearing member includes a surface layer containing a binder resin, a quaternary ammonium salt, graphitized particles, and conductive, spherical resin particles, and has a specific surface shape.

    摘要翻译： 提供一种能够抑制具有暂停时段的不连续打印模式下的图像浓度波动的显影装置。 显影装置包括用于在感光鼓上显影静电潜像的显影剂，用于承载和输送显影剂的显影剂承载部件和靠近显影剂承载部件放置的显影剂层厚度调节单元，用于调节显影剂携带量 并由显影剂承载部件传送，显影剂层厚度调节单元为。 作为显影剂，使用具有含有粘合剂树脂和磁性氧化铁颗粒的磁性调色剂颗粒，并且具有比饱和磁化强度，比重重量平均粒径和具体组成的带负电荷的单组分磁性调色剂。 显影剂承载构件包括含有粘合剂树脂，季铵盐，石墨化颗粒和导电球形树脂颗粒的表面层，并且具有比表面形状。

    Developer bearing member and process for producing same, development apparatus and development method
    8.
    发明授权
    Developer bearing member and process for producing same, development apparatus and development method 有权
    显影剂轴承构件及其制造方法，开发装置和开发方法

    公开(公告)号：US08546051B2

    公开(公告)日：2013-10-01

    申请号：US12508148

    申请日：2009-07-23

    申请人： Satoshi Otake ,  Masayoshi Shimamura ,  Yasutaka Akashi ,  Takuma Matsuda ,  Minoru Ito ,  Kazuhito Wakabayashi

    发明人： Satoshi Otake ,  Masayoshi Shimamura ,  Yasutaka Akashi ,  Takuma Matsuda ,  Minoru Ito ,  Kazuhito Wakabayashi

    IPC分类号： G03G5/07

    CPC分类号： G03G15/0818 ,  G03G9/0819 ,  G03G9/0823 ,  G03G9/08791 ,  G03G15/0928 ,  G03G2215/0861 ,  G03G2215/0863

    摘要： A developer bearing member is provided which can charge a toner stably and uniformly during the period from the initial stage to the terminal stage of extensive operation even in various environments. The developer bearing member includes a substrate and an electrically conductive resin coating layer formed on the surface thereof. The electrically conductive resin coating layer is formed from a resin composition containing a phenolic resin having in its structure at least one of an —NH2 group, an ═NH group and an —NH— linkage, a quaternary phosphonium salt and electrically conductive fine particles and the resin composition contains 1 part by mass or more and 60 parts by mass or less of the quaternary phosphonium salt with respect to 100 parts by mass of the phenolic resin.

    摘要翻译： 提供了一种显影剂承载构件，其可以在即使在各种环境中从初始阶段到终止阶段的广泛操作期间稳定均匀地对调色剂进行充电。 显影剂承载部件包括在其表面上形成的基板和导电树脂涂层。 导电性树脂被覆层由含有具有-NH 2基，= NH基和-NH-键中的至少一种结构的酚醛树脂，季鏻盐和导电性微粒的树脂组合物形成，以及 相对于100质量份酚醛树脂，树脂组合物含有1质量份以上且60质量份以下的季鏻盐。