| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce burrs of punch holes and to improve the positional accuracy of the punch holes. SOLUTION: When a paper sheet P is punched by a punch 103 and a die 106, a distance x1 between a punching position H, and the center of a carriage driving roller 44a and the center of a carriage driven roller 44b is set shorter than a distance between the forefront end of the paper sheet P and a first punch hole. A distance x2 between the punching position H, and the center of a carriage driving roller 45a and the center of a carriage driven roller 45b is set shorter than a distance between the rear end of the paper sheet P and a final punch hole of the paper sheet P. That is, the paper sheet P is nipped before the punch hole by the carriage driving roller 45a and the carriage driven roller 45b and is nipped after the punch hole by the carriage driving roller 44a and the carriage driven roller 44b. As a result, the flapping of the paper sheet is restrained.</p> |
