| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device which provides stable concentration transition throughout the entire life and can suppress the concentration reduction and negative ghost arising particularly in an initial period of use, and to provide a process cartridge. <P>SOLUTION: Spherical polymer particles which have the weight mean grain size sufficiently smaller than that of a toner 11 and are of the polarity reverse to the polarity of the toner 11 are used as a lubricant 3 to be applied to the contacting part of a developing blade 9 and the developing sleeve 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
