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    • 8. 发明申请
    • DEVELOPING APPARATUS AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS
    • 开发设备和电子图像形成设备
    • US20090257788A1
    • 2009-10-15
    • US12486273
    • 2009-06-17
    • Takuma MatsudaMasayoshi ShimamuraYasutaka AkashiSatoshi OtakeMinoru ItoKazuhito WakabayashiDaisuke Yoshiba
    • Takuma MatsudaMasayoshi ShimamuraYasutaka AkashiSatoshi OtakeMinoru ItoKazuhito WakabayashiDaisuke Yoshiba
    • G03G15/09
    • G03G9/0833G03G9/0835G03G2215/0609
    • 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.
    • 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。
    • 9. 发明授权
    • Developing apparatus and electrophotographic image-forming apparatus
    • 显影装置和电子照相成像装置
    • US07796926B2
    • 2010-09-14
    • US12486273
    • 2009-06-17
    • Takuma MatsudaMasayoshi ShimamuraYasutaka AkashiSatoshi OtakeMinoru ItoKazuhito WakabayashiDaisuke Yoshiba
    • Takuma MatsudaMasayoshi ShimamuraYasutaka AkashiSatoshi OtakeMinoru ItoKazuhito WakabayashiDaisuke Yoshiba
    • G03G15/08
    • G03G9/0833G03G9/0835G03G2215/0609
    • 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.
    • 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。