An image forming apparatus includes a plurality of developing devices, each of which includes a developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member with a developer, and a developer regulating member for regulating the developer carried on the developer carrying member; a common voltage applying device for applying voltages to the developer regulating members, wherein the voltages are applied to the developer carrying members are variable independently from each other, and when at least one of the voltages varies, the voltage applied by the voltage applying device is capable of being changed.

 
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< Optical information recording and reproducing method and apparatus for reproducing information utilizing maximum-likelihood decode

< Process cartridge and electrophotographic image forming apparatus

> Image forming apparatus and image forming unit detachably mountable thereto

> Imaging method and apparatus with exposure control

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