| 摘要 |
A developing apparatus for developing an electrostatic image on an electrostatic image bearing member comprises a single component developer, a stationary developing roller adjacent the electrostatic image bearing member. The developing roller comprises an electrically conductive sleeve having a plurality of spaced apart channels on the surface of the conductive sleeve and an electrically conductive segment in each of the channels. The electrically conductive segments are insulated from the conductive sleeve by an insulator in each of the channels. A voltage source is connected between the conductive sleeve and the conductive segments for applying voltage to the developer to thereby charge the developer. The developer is then moved across the developing roller to the electrostatic image bearing member. The developer is evenly charged by the voltage source as it moves across the surface of the developing roller.
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