Patent ID: 6501916
Filing Date: 2002-12-31
Classification: G03G

Abstract:
An image forming apparatus comprising:a plurality of image forming means for forming images in different colors, each of said plurality of image forming means including an image bearing member, charging means for charging said image bearing member, developing means for developing an electrostatic latent image formed on said image bearing member by a developer containing toner and a carrier, and detecting means for detecting information corresponding to a permeability of the developer in said developing means; control means for controlling an amount of the developer supplied to each of said developing means according to an output from said detecting means and a corresponding target value, wherein each of said charging means includes magnetic particles, which are brought into contact with said image bearing member, a permeability of the magnetic particles being different from a permeability of the carrier; and correcting means for correcting each of the target values, wherein an amount of correction by said correcting means on correcting a target value corresponding to one detecting means of a plurality of said detecting means is different from an amount of correction by said correcting means on correcting a target value corresponding to another detecting means of said plurality of detecting means.