| 摘要 |
PROBLEM TO BE SOLVED: To always obtain stable potential by electrification though an image forming device having a contact type electrifying roller is moved to a place where ambient temperature is remarkably different. SOLUTION: At the time of starting image forming operation right after moving the image forming device to the place where temperature is remarkably different and in the case of judging that the time when a main switch 3 is turned off in the case it is turned on again after it is turned off is equal to or below specified time and temperature difference between detected temperature detected by a temperature detection sensor 20 right after turning on the main switch 3 and the detected temperature right before turning off the main switch 3 is equal to or above specified temperature; applying voltage applied to an electrifying roller 2 is corrected in accordance with the temperature difference. Thus, a photoreceptor 1 is always electrified to the aimed potential by the electrification without being influenced by the ambient temperature. |
