| 摘要 |
<p>A device for screwing caps onto receptacles, the device comprising a rotary spindle having a first end provided with a cap gripper head and a second end connected to a two-portion clutch member, one of which portions is constrained to rotate with the second end of the rotary spindle, and the other of which portions is constrained to rotate with a drive shaft on the same axis as the spindle and associated with a drive member, wherein the portions of the clutch member comprise a magnetic bell and a magnetic core having dimensions suitable for enabling it to be engaged in the bell, the device further comprising a displacement member for displacing the bell and the core relative to each other between a position in which the core is engaged in the bell and a position in which the core is disengaged from the bell.</p> |
