| 摘要 |
<p>A sheering device (1) for folded fascicles (2) is disclosed comprising comb-shaped sheering means (3) adapted to assume a lifted position and a lowered position with respect to the advancement path of the fascicles (2) in order to sheer the fascicles (2) towards two respective downstream paths, where the comb-shaped sheering means (3) are driven by cams (5) to their two operating positions. The sheering device (1) is further equipped with at least one motor (7) of a type with alternate current and digital vector control, that is adapted to automatically select one of said cams (5) and drive the selected cam (5) according to the upstream advancement speed of a system (9) for folding said fascicles (2). In this way, only two cams (5', 5'') are used for applications needing three operating ratios.</p> |
