| 摘要 |
<p>An improved and more efficient device and method for creating multiple punch holes during a finishing process of paper sheets and other sheet materials. A highlight of the present invention is the ability to sele ct between at least two configurations of punch holes automatically, without manual adjustment, and "on-the-fly" without interruption of the sheet or pap er flow. The improved sheet punch comprises two rotatable punches set at different angles such that when one intersects the sheet path, the other clears the sheet path. The speed of rotation is controlled such that the non-select ed punch intersects the sheet path in a space between pitches.</p> |
