| 摘要 |
PURPOSE:To prevent the forgery of a paper money, etc., in an analog copying machine, digital copying machine, digital printer, etc. CONSTITUTION:The existence of image on the rear side of a transferred paper is detected by a sensor 44 for detecting the rear side image, which is arranged oppositely facing to a carrying course of the transferred paper, and when the image exists on the rear side, the process different from that of the normal copying, e.g. shifting the position of the image, changing the magnification of the image, omitting a part of the image and changing the fixation temperature are carried out. That is, when the paper money, etc., are copied, the copying of both sides is required, therefore, the formation of the image on both sides of the transferred paper is basically prohibited, and the process different from that of the normal case are carried out when the image formation on the both sides is desired. |
