| 摘要 |
Containers ( 2 ) are closed with screw caps ( 3 ) by a unit ( 1 ) of the type comprising a carousel ( 7 ) on which to advance the containers ( 2 ) and the relative caps ( 3 ), driven by a motor ( 6 ) about a respective primary axis ( 5 a) and equipped with a plurality of capping assemblies ( 11 ) each positioned above a relative container ( 2 ) and capable of movement vertically between a first position, distanced from the container ( 2 ), and a second position of active engagement with the container ( 2 ). Each capping assembly ( 11 ) presents a gripping mechanism ( 17 ) positionable so as to engage a relative cap ( 3 ) when the assembly ( 11 ) is in the second position, and rotatable about a respective secondary axis ( 17 a) in such a way as to screw the cap ( 3 ) onto a threaded neck ( 4 ) of the relative container ( 2 ). The unit ( 1 ) further comprises first motors ( 14 ) by which the capping assemblies ( 11 ) can be raised and lowered one independently of another, and second motors ( 18 ) by which the gripping mechanisms ( 17 ) can be rotated one independently of another.
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