Patent ID: 9146507
Filing Date: 2015-09-29
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member; a toner image forming portion configured to form a toner image on said image bearing member; a transfer member configured to transfer the toner image from said image bearing member onto a recording material at a transfer position; a power source configured to apply a voltage to said transfer member; a detecting member configured to detect a current flowing through said transfer member during a non-sheet-passing period in which the recording material is not in the transfer position, a setting portion configured to set a first voltage, where a target current flows through said transfer member when the first voltage is applied to said transfer member in a sheet-passing period in which the recording material is in the transfer position, based on detection results of said detecting member under application of a plurality of different test voltages in a test mode in advance, where a first current flows through said transfer member when the first voltage is applied to said transfer member in the non-sheet-passing period, during a first period; and an executing portion configured to execute an adjusting mode, in which in a case that images are continuously formed on a plurality of recording materials, the first voltage is applied to said transfer member during both a plurality of non-sheet-passing periods and a plurality of sheet-passing periods, during the first period, then the first voltage is adjusted so that the detection result under application of a voltage is the first current, during a second period later than the first period.