Patent ID: 6332063
Filing Date: 2001-12-18
Classification: G03G

Abstract:
An image forming apparatus comprising:a plurality of image bearing members;a plurality of image forming means for forming images having colors different from each other on each of said image bearing members,wherein each of said image forming means includes developing means for developing an electrostatic image formed on said image bearing member with a developer including a toner and carrier, andwherein toner remaining on each of said image bearing members is collected in a corresponding one of said developing means after the image on each of said image bearing member is transferred on a common recording material,a plurality of detecting means for detecting information corresponding to a density of the developer in each of said developing means; andcontrol means for controlling an amount of the developer with which each of said developing means is replenished according to an output of each of said detecting means,wherein each of said detecting means detects information corresponding to a permeability of the developer.