| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for determining a truth or a falsehood of a printing sheet which can be inexpensively executed and in which a maintenance of a reader can be simply executed. SOLUTION: The method for determining the truth or the falsehood of the printing sheet comprises the steps of previously printing a truth or a falsehood determining straight line 16 on a rolled sheet 15, so that the line 16 optically readable by inclining the line at a predetermined angle with respect to a lengthwise direction of the printed matter so as to determine the truth or the falsehood of the sheet of the matter, in which at least a part of printed contents printed on the matter is optically readable in the matter formed in a suitable length by using the rolled sheet 15, optically reading the line 16 of the matter; calculating the inclining angle of the line 16 corresponding to the lengthwise direction of the matter based on read information; and determining the truth or the falsehood of the sheet of the matter based on its calculated result.</p> |
