| 摘要 |
PURPOSE:To provide the image forming device where transfer can be carried out well regardless of environmental change of temperature and humidity. CONSTITUTION:A developing current measuring circuit 24 is connected between a developing sleeve 4CS and a developing bias electric power source 23, and a transfer control circuit 25 is connected between the developing current measuring circuit 24 and a transfer electric power source 26. Then, data showing the relationship of the developing current and an appropriate transfer current with respect to the change of the temperature and the humidity is stored in the transfer control circuit 25, and setting is carried out so that the most appropriate transfer current is selected and the transfer electric power source 26 is controlled based on the developing current detected by the developing current measuring circuit 24. Thus, the change in the quantity of electrification of the toner can be directly detected and the transfer condition can be controlled appropriately. |
