Patent ID: 7899349

Claim:
An image forming apparatus comprising: an image bearing member; a toner image forming device for forming a toner image on said image bearing member; a transfer member for forming a transfer portion for transferring the toner image formed on said image bearing member onto a transfer material in a state in which the transfer portion is pressed to said image bearing member; a power source for applying a voltage to said transfer member; a current detecting portion for detecting a current passing through said transfer member by the application of the voltage to said transfer member; a first control portion for executing a first step of setting a first voltage value to be applied to said transfer member depending on an output of said current detecting portion; a potential detecting member for detecting a potential of said image bearing member; an adjusting portion for adjusting a toner image forming condition on the basis of a detected potential, by said potential detecting member, of an electrostatic latent image formed for adjusting the toner image forming condition; and a second control portion for executing a second step of setting a second voltage value to be applied to said transfer member during image formation on the basis of a current detected by a current detecting portion when the electrostatic latent image passes through the transfer portion in a state in which the voltage of the first voltage value is applied to said transfer member.