| 摘要 |
<p>The device comprises a driving belt (7) on which are arranged rolling means (11) with off-set shaft, defining an upper support surface adjustable in lenght by rotation of the driving belt (7). The rolling means (11) are arranged on a portion only of the length of the driving belt (7) so that the rotation of said belt (7) allows to adjust the length of the support surface for the sheet metal, particularly in relation to the position of the adjustable stop (3).</p> |
