公开(公告)号：US20090310995A1

公开(公告)日：2009-12-17

申请号：US12478055

申请日：2009-06-04

申请人： Kanji NAKAYAMA ,  Noritoshi HAGIMOTO ,  Yuusuke OKUNO ,  Tomo KITADA ,  Toshiya AOKI

发明人： Kanji NAKAYAMA ,  Noritoshi HAGIMOTO ,  Yuusuke OKUNO ,  Tomo KITADA ,  Toshiya AOKI

IPC分类号： G03G15/06

CPC分类号： G03G15/065 ,  G03G15/0849 ,  G03G15/0862 ,  G03G15/0877 ,  G03G15/0879

摘要： In case new and old toners may be mixed, a developing bias is set as follows. The time is first clocked. The number of times toner is replenished from a hopper into a buffer for a clocked period is counted. If a replenishment amount per clock time is a threshold value or higher, considering that new and old toners are mixed, the setting of the developing bias is changed. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area but not to fly in a background area. No image fogging is therefore generated in the background area. Thus, an image forming apparatus and method capable of preventing low-charged toner and oppositely-charged toner generated by mixing of new and old toners from adhering to the background area of an electrostatic latent image on the photoconductor, thereby avoiding generation of image fogging.

摘要翻译： 如果新旧的调色剂可能混合，则显影偏压设置如下。 时间是第一时间。 计数将调色剂从料斗补充到缓冲器中的次数。 如果每个时钟时间的补充量是阈值或更高，则考虑到新的和旧的调色剂混合，改变了显影偏差的设定。 设置显影辊和光电导体之间的电场强度以使正常充电的调色剂在图像区域中飞行，但不在背景区域中飞行。 因此，在背景区域中不会产生图像雾化。 因此，能够防止由新旧的调色剂混合而产生的带电荷低的调色剂和相反电荷的调色剂粘附在感光体上的静电潜像的背景区域，从而避免图像起雾的形成装置和方法。