| 摘要 |
PURPOSE:To prevent an original and its two-color copy from being confused, by operating an optical path changing means to exposure light which has passed through a lens. CONSTITUTION:Exposure light of an original is split by a half mirror 5 afer passing through a lens, and its reflected light and transmitting light are irradiated to a black image forming photosensitive body 12 and a red image forming photosensitive body 11, respectively. Transfer paper is carried by a carrying belt 6, and first of all, a red picture is transferred at a position of the red image forming photosensitive body 11, and subsequently, a black picture is transferred at the position of the black image forming photosensitive body 12, and thereafter, it is passed through a fixing device. In this device, the positions of the red picture and the black picture are shifted from each other by changing an optical path of the exposure light which has passed through the lens, by which the original and a copy can be discriminated easily. |
