公开(公告)号：US20040223786A1

公开(公告)日：2004-11-11

申请号：US10832445

申请日：2004-04-27

申请人： CANON KABUSHIKI KAISHA

发明人： Yusuke Hasegawa ,  Yuichi Mizoo ,  Tadashi Dojo ,  Nene Shibayama ,  Tomohisa Sano

IPC分类号： G03G015/01

CPC分类号： G03G9/0833 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/0836 ,  G03G9/0838 ,  G03G9/08782

摘要： In an image forming apparatus having at least an amorphous silicon photosensitive member, a magnetic toner developing means and a color developer developing means, the magnetic toner has a weight-average particle diameter (D4) of from 4.0 nullm to 10.0 nullm and a ratio thereof to number-average particle diameter (D1), D4/D1, of from 1.0 to 2.0, and the number of magnetic particles not passing through a mesh with an opening of 34 nullm which are contained in the unit volume of the magnetic toner is from 3.5 to 105. This image forming apparatus can not easily cause faulty cleaning performance even in using the magnetic toner and the non-magnetic color toners in combination and has superior environmental stability and running stability even where toners made to have small particle diameter are used or process speed is high.

摘要翻译： 在至少具有非晶硅感光构件，磁性调色剂显影装置和显色剂显影装置的图像形成装置中，磁性调色剂的重均粒径（D4）为4.0μm至10.0μm，并且其比例 至数均粒径（D1），D4 / D1为1.0〜2.0，磁性调色剂的单位体积中所含的未通过具有34μm的孔的网眼的磁性粒子数为 即使在使用磁性调色剂和非磁性色调剂的情况下，即使使用具有小粒径的调色剂，也可以具有优异的环境稳定性和运行稳定性，该图像形成装置不容易引起清洁性能的故障。 处理速度高。