Development apparatus having a developer feeder roll
    2.
    发明公开
    Development apparatus having a developer feeder roll 失效
    Entwicklungsapparat mit Entwicklungswalze

    公开(公告)号:EP0686893A1

    公开(公告)日:1995-12-13

    申请号:EP95303876.7

    申请日:1995-06-06

    申请人: XEROX CORPORATION

    IPC分类号: G03G15/09

    CPC分类号: G03G15/0928 G03G2215/0643

    摘要: A development apparatus (40) includes a housing (48) defining a chamber (46) holding a supply of two-component developer material consisting of toner, and magnetizable carrier beads. The development apparatus also includes an extended life, increased reliability magnetic roll assembly within the housing for repeatably transporting a desired quantity of attracted developer material, fed from the chamber, for movement through the development zone. The improved magnetic roll assembly (50; Fig.2) includes a rotatable non-conductive shell or substrate (90; Fig.2) surrounding a magnetic member (M1-M4; Fig.2) so as to prevent the creation of eddy currents in the substrate during its rotation. The substrate has an elastomeric coating layer formed (100; Fig.2) over it. The elastomeric coating layer has a mechanically deformable smooth surface (102; Fig.2) for effectively holding, even at relatively high rates of speed, the quantity of attracted developer material thereon being transported. The smooth surface is deformable by magnetized carrier beads acting under the influence of the magnetic member.

    摘要翻译: 一个发展appts。 用于显影记录在图像承载部件上的潜像包括存储包含调色剂颗粒和可磁化载体珠的可磁化双组分显影剂的壳体和用于将显影剂从混合室输送到显影区并且包括可移动基底 具有第一和第二表面以及通过混合室的运动路径,与运动路径相邻的磁性构件和第一衬底表面,并沿着运动路径围绕第一点产生强磁场,并形成薄的弹性体涂层 在第二基板表面上并且具有用于保持在第一点吸附到其上的磁性显影剂的光滑表面,该光滑表面由在强磁场下作用的磁化载体珠可机械地变形,以形成用于在运输期间摩擦地保持显影剂的凹陷。 还要求的是馈电组件本身以磁辊组件的形式。 县。 appts。 包括可移动的供体构件, 可旋转辊,安装成用于从弹性体涂层接收带电调色剂颗粒并将其移动通过用于显影潜像的显影区。 可动基板的移动路径是连续的并且包围着磁性部件。 可移动基板是可围绕磁性构件旋转的刚性圆柱形外壳。 该外壳的弹性模量E大于30万磅/英寸2,长度为475毫米,偏心中心为0.0016英寸。 当负责开发商。 可动基板包括非导电材料, 通用聚碳酸酯材料或具有300,000lbs / in2的弹性模量和108ohm.cm的电阻率的聚氨酯类聚酯材料。