Patent ID: 7899343
Filing Date: 2011-03-01
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member on which an electrostatic image is to be formed; a developing device for accommodating a developer including toner and a carrier and for developing the electrostatic image with the developer; a developer supply container, detachably mountable to a main assembly of the image forming apparatus, for accommodating a supply developer including the toner; a detecting device for detecting a toner content of the developer in said developing device; a supply control device for controlling an operation of supplying the supply developer into said developing device on the basis of a detection result of said detecting device and a density target value; a memory element, provided on said developer supply container, for storing information relating to an elapse of time from a manufacturing date of the supply developer; and a controller for determining the density target value such that a density target value determined when the elapse of time is longer than a reference elapse of time is smaller than the density target value determined when the elapse of time is shorter than the reference elapse of time.