| 摘要 |
PURPOSE:To cancel a copying process in the case of detecting the color-copying of a back surface by providing a color detecting sensor in a paper feeding part and detecting a copying paper so that both-side full color copying may be prevented. CONSTITUTION:By pressing a printing button, a copying mode is executed and a toner image is formed on a transfer intermediate body 10. A transfer paper 5 is fed from paper feeding cassettes 6 and 7, passes a timing roller 11b and is fed to a roller 11a. At such a time, a color sensor G monitors the transfer paper 5, and in the case of detecting that color toner adheres to the transfer paper 5, a transfer roller 15 is not actuated, the transfer paper 5 is fed to a feeding belt 17, and cleaning to remove the toner image on the transfer intermediate body 10 is performed. |
