Patent ID: 7103305

Claim:
A developing apparatus which uses a two-component developer consisting of a toner and carrier, comprising: a developer support body which supports and rotates the developer; a developer amount regulating member which regulates the amount of the developer on the developer support body to an appropriate amount; and screws for stir and convey the developer, wherein the ratio between the amount of the developer M 1 which is drawn onto the developer support body and refluxes while being regulated by the developer amount regulating member, and the amount of developer (drawn amount) M 2 which passes through the developer amount regulating member is M 1 /M 2 <10; said toner is a negatively-charged toner; and in a charge amount (q/d) distribution the number of toners of −1 fc/10 μm or more is 20% or less of the total number of toners.