| 摘要 |
In order not to expel toner excessively when bias is applied, a cleaner-less image forming apparatus comprises a first developer charge amount controlling device 7, provided on a downstream side of a transfer device 5 in a moving direction of an image bearing member 1, for applying DC bias for making uniform the charge amount of residual developer remaining on the image bearing member 1, and/or a second developer charge amount controlling device 8, provided on a downstream side of said first developer charge amount controlling device 7 in the rotating direction of the photosensitive drum 1, for applying DC bias for charging the residual developer in a normal polarity. The absolute value of the slope of the DC voltage applied to the first developer charge amount controlling device 7 and/or the absolute value of the slope of the DC voltage applied to the second developer charge amount controlling device 8 are equal to 2000 V/sec or smaller.
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