Patent ID: 6978106

Claim:
A developing apparatus comprising: a developer container for containing developer including toner and carrier; a first carrying member, provided in said developer container, for carrying the developer to develop an electrostatic image formed on an image bearing member; a second carrying member, provided in said developer container, for rotating to carry the developer in a rotation axial direction of said second carrying member; a developer supplying device, which supplies said developer container with supplemental developer including toner and carrier; and a discharge opening, provided in an area of said developer container in which the developer is carried by said second carrying member, for discharging out of said developer container through said discharge opening excess developer resulting from a supply of the supplemental developer, wherein a developer carrying capability in the rotation axial direction of said second carrying member is greater in an area near said discharge opening than in an area downstream of said discharge opening in a carrying direction of the developer.