Patent ID: 6744994
Filing Date: 2004-06-01
Classification: G03G

Abstract:
An image forming apparatus comprising:an image bearing member; charging means for electrically charging said image bearing member, said charging means including a charging member disposed in contact with said image bearing member; developing means for developing an electrostatic latent image formed on said image bearing member with a developer into a developed image; transferring means for transferring the developed image from said image bearing member onto an image receiving member; a first developer charging member for electrically charging a residual developer on said image bearing member, said first developer charging member being disposed downstream of said transferring means and upstream of said charging means, with respect to a movement direction of said image bearing member, and said first developer charging member being supplied with a voltage of a polarity opposite a regular polarity of the developer; a second developer charging member for electrically charging the residual developer on said image bearing member to the regular polarity of the developer, said second developer charging member being disposed downstream of said first developer charging member and upstream of said charging means, with respect to the movement direction of said image bearing member, and said second developer charging member being supplied with a voltage; means for detecting an environmental condition of said image forming apparatus; and controlling means for controlling, in accordance with an output of said detecting means, at least the voltage applied to said second developer charging member.