| 摘要 |
PURPOSE:To prevent a copying density detector from being contaminated by a toner, etc., by providing a conductive brush for catching a floating toner, etc., in the vicinity of the detector. CONSTITUTION:The circumference of a copying density detector 4 for optically detecting the copying density from a density detecting image on a photosensitive body 1, which has been developed by a developing device 2 is covered with a cover 6. The cover 6 is formed by bending an electric conductor such as a copper plate, etc., approximately in a channel shape, and is installed so that an opening 6a of the end part may face to the photosensitive body 1 side. On the upper surface of a chute 5, a lot of conductive brushes 7 are provided so that the tip does not shield light from the detector 4, and a floating toner, paper powder, etc. flowing into the copying density detector 4 side together with a flow of air generated when the photosensitive body 1 rotates are caught mechanically and electrostatically before they reach the detector 4. |
