| 摘要 |
<p>A stop mechanism for a feed roller (4) associated with a cutter (40) in a dispenser (30) for flexible rolled web material (w) has a stop lever (15) which provides a substantial mechanical advantage. The increased mechanical advantage permits the vacuum cups (13 and 14) of a vacuum cup timer to be effortlessly and reliably set. The stop lever (15) has a long actuating arm (18) which pivots about a pivot point (11). The long actuating arm (18) creates a substantial mechanical advantage for setting the vacuum cups (13) and (14) in vacuum-gripping engagement. The mechanical advantage greatly enhances the low pull force requirement and smooth operation of the dispenser (30).</p> |
