| 摘要 |
<P>PROBLEM TO BE SOLVED: To appropriately set air quantity for sucking scattered toner and to appropriately decide the life of a filter for collecting the sucked toner in an electrophotographic image forming apparatus. <P>SOLUTION: The air quantity of a suction means is controlled, based on an image ratio or toner concentration. The life of the filter is decided, based on the image ratio or the toner concentration and the number of printed sheets. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
