| 摘要 |
PURPOSE:To suppress the degradation of sensitivity caused by the fatigue by light of an image carrier as little as possible by turning on a pre-transfer uniform exposure means only when the result of the detection of a humidity detecting means exceeds a prescribed threshold. CONSTITUTION:An electrostatic latent image formed on a photoreceptor drum 1 by exposed light 13 by an exposure device is actualized on the photoreceptor drum 1 by a developing device 2, transferred onto a transfer paper 20 carried by a transferred body housing device 3 by a transfer device 4 and fixed by a fixing device 5 and the transfer paper 20 is ejected. At this time, a signal from a humidity sensor 7 is inputted to a humidity detecting circuit 10 to detect humidity and the result of the detection is transmitted to an exposure controller 11. In the controller 11, only when it is decided that the inputted humidity is on a previously set threshold or more, the signal is outputted to a pre-transfer exposure device driving circuit 12, so that a pre-transfer exposure device 6 is turned on to uniformly expose the photoreceptor drum l before a transfer. |
