Back to results
US 6,611,668 B2Granted
Image forming apparatus with residual developing charging feature
AssigneeCanon Kabushiki Kaisha
InventorsYasunari Watanabe, Motoki Adachi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorsYasunari Watanabe, Motoki Adachi
Estimating the term…
In order not to expel toner excessively when bias is applied, a cleanerless image forming apparatus includes 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, e.g. a photosensitive drum, for applying a DC bias for making uniform a 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 the first developer charge amount controlling device 7 in a rotating direction of the image bearing member 1, for applying a DC bias for charging the residual developer in a normal polarity. An absolute value of a slope of the DC voltage applied to the first developer charge amount controlling device 7 and/or an absolute value of a slope of the DC voltage applied to the second developer charge amount controlling device 8 are equal to 2000 V/sec or smaller.
An image forming apparatus comprising:
An image forming apparatus comprising:
Dependencies are inferred from the claim text.