| 摘要 |
PROBLEM TO BE SOLVED: To stably and accurately detect the thickness of a photosensitive layer on an image carrier with respect to the image forming device capable of charging the image carrier by non-contact type charging means in a state of being held in non-contact therewith. SOLUTION: This image forming device accurately and stably detects the thickness of the photosensitive layer on a photoreceptor 1 by simple device/ circuit structure by detecting the current value conducted from the scolo thoron type corona charger 2 to the photoreceptor 1, and a voltage applied from a power source 9 to the scolo thoron type corona charger 2 by the layer thickness detecting circuit 10, when applying charge bias from a power source 9 to the scolo thoron type corona charger 2, and predetermining the thickness of the photosensitive layer on the photoreceptor 1 by the controlling device 11 based on the detection information of the above current value and the voltage detected by the layer thickness detecting circuit 10. |
