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    Developing device and image forming apparatus and process cartridge incorporating same
    4.
    发明公开
    Developing device and image forming apparatus and process cartridge incorporating same 审中-公开
    显影装置及图像形成装置以及处理卡盒

    公开(公告)号：EP2905659A3

    公开(公告)日：2015-09-02

    申请号：EP15152870.0

    申请日：2015-01-28

    申请人： Ricoh Company, Ltd.

    发明人： Kondoh, Keinosuke ,  Tsuda, Kiyonori ,  Takahashi, Yutaka ,  Mikuniya, Kentaro ,  Koike, Toshio ,  Shiraishi, Emiko

    IPC分类号： G03G15/06 ,  G03G15/09

    CPC分类号： G03G15/0921 ,  G03G15/065 ,  G03G15/0907

    摘要： A developing device (5) includes a developer bearer (50) to carry, by rotation, developer including toner and magnetic carrier to a development range facing a latent image bearer (1) to bear a latent image. The developer bearer (50) includes a magnetic field generator (55) having multiple magnetic poles (P1, P2, P3, P4, P5) and a cylindrical developing sleeve (51) to rotate and bear developer on an outer circumferential surface thereof with magnetic force of the magnetic field generator (55) disposed inside the developing sleeve (51). The developing sleeve (51) receives development voltage including an AC component having a frequency of 2.0 kHz or lower, and a duty ratio of a component having a polarity opposite a toner normal charge polarity of the AC component is within a range from 4% to 20%.

    Image forming apparatus and process cartridge
    7.
    发明公开
    Image forming apparatus and process cartridge 有权
    成像设备和处理盒

    公开(公告)号：EP1491970A1

    公开(公告)日：2004-12-29

    申请号：EP04014879.3

    申请日：2004-06-24

    申请人： Ricoh Company Ltd.

    发明人： Murakami, Eisaku ,  Nagashima, Hiroyuki ,  Yanagida, Masato ,  Kumagai, Naohiro ,  Shintani, Takeshi ,  Koike, Toshio ,  Sampe, Atsushi ,  Kawasumi, Masanori ,  Tomita, Masami ,  Uchitani, Takeshi

    IPC分类号： G03G21/18

    CPC分类号： G03G21/1817 ,  G03G21/08

    摘要： An image forming apparatus (100) which contains a latent image bearing member (1), a charger (3), a latent image forming device, a developing device (5), a surface moving member, a transfer device (6), a cleaner (7) having a cleaning blade (7A) and an irradiating device (4) configured to discharge the latent image bearing member (1). This image forming apparatus (100) is capable of producing quality images by using a toner having a circularity not less than 0.94. The image forming apparatus (100) can easily remove toner particles remaining on the latent image bearing member (1) with the cleaning blade (7A) contained in the cleaner (7) by placing the irradiating device (4) on the upstream from the cleaner (7) relative to the rotation direction of the latent image bearing member (1).

    摘要翻译： （1），充电器（3），潜像形成装置，显影装置（5），表面移动部件，转印装置（6），图像形成装置 具有清洁刮板（7A）的清洁器（7）和用于排出潜像承载部件（1）的照射装置（4）。 该图像形成装置（100）能够通过使用具有不小于0.94的圆形度的调色剂来产生高质量图像。 通过将照射装置（4）放置在清洁器（7）的上游，图像形成装置（100）可容易地利用容纳在清洁器（7）中的清洁刮刀（7A）去除残留在潜像承载部件 （7）相对于潜像承载部件（1）的旋转方向。

    Charging device using a charge roller and image forming apparatus including the same
    8.
    发明公开
    Charging device using a charge roller and image forming apparatus including the same 有权
    与充电辊和充电，并在此提供的图像形成装置

    公开(公告)号：EP1431838A2

    公开(公告)日：2004-06-23

    申请号：EP03020447.3

    申请日：2003-09-12

    申请人： Ricoh Company, Ltd.

    发明人： Kosuge, Akio ,  Koike, Toshio ,  Narita, Yutaka

    IPC分类号： G03G15/02

    CPC分类号： G03G15/025 ,  G03G2215/02

    摘要： An image forming apparatus of the present invention includes a charging device including a charge roller formed with annular grooves at opposite end portions thereof and configured to charge an image carrier. Annular gap forming members each are fitted in the annular grooves for forming a gap between the charge roller and the image carrier. The gap forming members each have an area of 1. 0 x 10 -6 m 2 to 3. 0 x 10 -6 m 2 in a section containing the axis of the charge roller.

    摘要翻译： 本发明的一种图像形成装置包括充电装置（30）包括一个充电辊（14），在相对的端部上并且被配置为在图像载体充电的环形设计形成的槽（64）。 环形间隙形成部件（63A，63B），每个被安装在环形槽设计用于形成充电辊和图像载体之间的间隙。 以缓冲的厚度变化的间隙形成部件可以各自具有在区域1.0×10 <-6>米<2>至3.0×10 <-6>米<2>在含有电荷辊的轴线（O）的截面 （14）或环形槽（64）中的每一个比其间是在充电辊（14）的轴向方向上及其相对端部深，或环形间隙形成部件（63A，63B）中，如果从一个管切割 ，绞合对彼此。

    DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME
    10.
    发明公开
    DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME 审中-公开
    黑德哥斯达黎加首都印度尼西亚

    公开(公告)号：EP2947516A1

    公开(公告)日：2015-11-25

    申请号：EP15166677.3

    申请日：2015-05-07

    申请人： Ricoh Company, Ltd.

    发明人： Shimizu, Yasunobu ,  Azami, Akira ,  Yamada, Masaaki ,  Ogawa, Yoshiko ,  Koike, Toshio ,  Morinaga, Mutsuki ,  Takahashi, Yutaka ,  Kondoh, Keinosuke ,  Mikuniya, Kentaro ,  Kishi, Yoshiharu

    IPC分类号： G03G15/08 ,  G03G15/095

    CPC分类号： G03G21/1676 ,  G03G15/065 ,  G03G15/0815 ,  G03G15/095

    摘要： A developing device (40) includes a developer bearer (45) to carry developer including toner and magnetic carrier to a developing range facing a latent image bearer (18); a casing (121) including a developer container (44; 47; 49) and an opening (51) to expose a part of the developer bearer (45); an opposing face (112A) of the casing (121) including a conductive material and opposing to a surface of the developer bearer (45) downstream from the developing range in a direction of rotation of the developer bearer (45); a developing bias source (141) to apply a developing bias to the developer bearer (45); and an insulation layer (123) disposed on the opposing face (112A) of the casing (121). The opposing face (112A) is disposed across, from the developer bearer (45), a casing gap (G1) sized to allow the developer borne on the developer bearer (45) to contact the opposing face (112A).

    摘要翻译： 显影装置（40）包括显影剂载体（45），用于将显影剂（包括调色剂和磁性载体）携带到面向潜像载体（18）的显影范围内; 包括显影剂容器（44; 47; 49）和用于暴露所述显影剂载体（45）的一部分的开口（51）的壳体（121）; 所述壳体（121）的相对面（112A）包括导电材料并与所述显影剂载体（45）的显影剂载体（45）的旋转方向下游的所述显影剂载体（45）的表面相对; 显影偏压源（141），用于向显影承载体（45）施加显影偏压; 以及设置在壳体（121）的相对面（112A）上的绝缘层（123）。 相对面（112A）跨越显影剂承载体（45）设置有尺寸允许承载在显影剂载体（45）上的显影剂接触相对面（112A）的壳体间隙（G1）。