| 摘要 |
PURPOSE:To prevent forgery by a copying machine by eliminating forcibly a picture on recording paper when an original scanned for copying is discriminated to be identical to a specific original. CONSTITUTION:When it is discriminated that an original picture read by an image scanner section is identical to a paper money or a security registered by a specific original discrimination circuit 205, a command of development stop is sent to a driver section 51 through a CPU 52 at a printer section 2. On the other hand, a signal from the CPU 52 outputs a command of white picture recording to a W developer 50 at the highest density regardless of a kind of an input picture signal. For example, when a 3rd scanning is finished and M, C, Y pictures are put already, a white toner image for erasing the picture is placed on a front side. Thus, even when all sequences are executed and recording paper is discharged at the outside of the printer after fixing, since the picture on the recording paper is erased by white toner, forgery is surely prevented. |
