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    • 2. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US08774655B2
    • 2014-07-08
    • US12878543
    • 2010-09-09
    • Motohiro UsamiTakahiro SekiMasashi NagayamaShinji AokiJun Hitosugi
    • Motohiro UsamiTakahiro SekiMasashi NagayamaShinji AokiJun Hitosugi
    • G03G15/00
    • G03G15/1645
    • An apparatus includes: an image carrier; a charger to uniformly charge a surface of the image carrier; an exposing unit to perform write scanning on the image carrier; a developing unit that includes a developer carrier carrying a developer including a toner and that is configured to perform a visible image process on an electrostatic latent image formed on the image carrier; and a transferor to transfer a toner image that has been subjected to the process onto a material. If length Lg of a non-image part directly before an image part in an image carrier moving direction has the relation of Lg≧π·Ds/(Vs/Vp), where Vp and Vs are circumferential velocities of the image carrier and the developer carrier and Ds is a diameter of the developer carrier, suppression of toner attachment on the material is controlled in a predetermined length from an image front end in the direction.
    • 一种装置包括:图像载体; 使图像载体的表面均匀充电的充电器; 曝光单元,用于在所述图像载体上执行写入扫描; 显影单元,其包括携带包含调色剂的显影剂的显影剂载体,其被构造成对形成在所述图像载体上的静电潜像进行可见图像处理; 以及将经过该处理的调色剂图像转印到材料上的转印器。 如果直接在图像载体移动方向上的图像部分之前的非图像部分的长度Lg具有Lg≥&Pgr;·Ds /(Vs / Vp)的关系,其中Vp和Vs是图像载体的周向速度, 显影剂载体和Ds是显影剂载体的直径,抑制材料上的调色剂附着物从图像前端沿该方向被控制在预定长度。