公开(公告)号：EP1574911A1

公开(公告)日：2005-09-14

申请号：EP04029559.4

申请日：2004-12-14

申请人： CANON KABUSHIKI KAISHA

发明人： Osada, Hikaru ,  Okuda, Kouichi ,  Shimizu, Yasushi ,  Chigono, Yasunori ,  Ogawa, Kena ,  Moriya, Shuji ,  Hagiwara, Kazunari

IPC分类号： G03G15/08

CPC分类号： G03G15/09 ,  G03G9/0836 ,  G03G9/0837

摘要： A developing device (60A) includes a rotatable developer carrying member (60b) for carrying a developer (t) to develop an electrostatic image formed on an image bearing member (1) with the developer; non-rotatable magnetic field generating means, disposed inside the developer carrying member, for magnetically attracting the developer on the developer carrying member; a regulating member (60c) for regulating an amount of the developer carried on the developer carrying member, wherein the developer carrying member is provided with a surface elastic layer (60b2), and the developer carrying member is press-contacted to the image bearing member, and wherein the developer is an one component magnetic toner which is regulated by the regulating member, in case of having an average circularity of not less than 0.965, to an amount of developer per unit area of the developer carrying member of 5 - 14 g/m 2 , so that the amount of electric charge thereof is 10 - 50 µC/g, and in case of having an average circularity of less than 0.965, to a developer amount per unit area of the developer carrying member of 8 - 15 g/cm 2 , whereby the charge thereof is 13 - 23 µC/g.

摘要翻译： 一种显影装置（60A）包括可旋转的基显影剂承载构件（60B），用于承载显影剂（T），以形成在图像承载部件上的静电图像上开发（1）与所述显影剂; 非旋转基体磁场产生装置，所述显影剂承载部件，用于磁性吸引在显影剂承载部件上的显影剂的内部处理完毕; 一对承载在显影剂承载构件worin显影剂承载构件上设置有表面弹性层（60B2）的显影剂的量的限制调节构件（60℃），和显影剂承载构件是压接触到所述图像承载部件 和worin显影剂是一种单组分磁性调色剂的所有这是由调节件在显影剂的量每显影剂承载的5-14克构件的单位面积的调节，在情况下，具有以不小于0965的平均圆形度，以 /米<2>，所以没有电荷的其量为10至50微米C / g，在具有至小于0965的平均圆形度，到显影剂量为每显影剂的单位面积承载的8个成员的情况下 - 为15g /厘米<2>，由此其电荷为13至23微米C /克。