| 摘要 |
PURPOSE:To enhance cleaning performance as transfer properties vary by computing the efficiency of transfer simultaneous with process control, and correcting the output of static elimination prior to cleaning accordingly. CONSTITUTION:When a process control is started a CPU starts reading a process control program (A). A patch of toner images is formed on a photoreceptor surface following the program and is read by a sensor and compared with a predetermined memory value and computed (C, D) and a charge voltage, a discharge voltage and a development bias and the like are adjusted so that the patch density becomes constant. Thereafter, a toner patch is formed again and transfer paper is fed and the residual amount of toners after transfer is detected and the difference between that value and a reference is calculated. The amount of correction of the output of static elimination (PCC) prior to cleaning is computed (C, D) from the difference to control the PCC output (B). Stable cleaning performance is thus provided. |
