| 摘要 |
PURPOSE:To keep secrecy of information, by permitting copy only when the prescribed pattens of an original and a copying sheet are in a prescribed corresponding relationship in the case where a secret or the like mark of the original is read out. CONSTITUTION:When ''secret'' or the like specific mark M of an original O is read out with the mark reader of a copying apparatus 1, the prescribed patterns QA, QB of the original O and a copying paper sheet P are photographed with each corresponding camera. When it is judged that this photograph signal discriminates the presence of the prescribed corresponding relationship as a result of the scanning comparison of a microprocessor, ''copy is not permitted'' is indicated on a display 15, and the copy is not executed, but it is copied only on a specified copying sheet, thus keeping secrecy of the information. |
