Patent ID: 7684714
Filing Date: 2010-03-23
Classification: G03G

Abstract:
1. An image forming device in which image carrying bodies on which an electrostatic latent image is respectively formed in accordance with for each a plurality of colors are arranged in a tandem manner, in which a charging voltage in which an alternating voltage and a direct voltage are superimposed is applied to charging devices which respectively charge each image carrying body, and in which a color image is formed by sequentially overlapping a toner image of each color formed on each image carrying body on an intermediate transfer medium or a transfer material, wherein a direct voltage power supply for applying a direct voltage to the charging device for each color is independently provided for each charging device for each color, and an alternating voltage power supply for applying an alternating voltage to the charging device for each color is commonly provided to the charging device for each color, a current detecting section for detecting a current which flows between the each image carrying body and the each charging device is provided, and a control device is provided which judges that the image carrying body is damaged when a current value detected by the current detecting section is not less than a preliminarily set specified value when a direct voltage is sequentially independently applied to the charging device for each color when leakage of charging voltage is generated.