Capping unit for automatically assembling pump-operated spray cap bottles

摘要

A capping unit for capping containers with respective caps, each presenting a spray head with a ring nut for fitting it to the threaded neck of the container; the capping unit presenting at least one capping head wherein a first gripping device grips a respective spray head, and a second gripping device presents two jaws for gripping the ring nut and rotating it in relation to the first gripping device; each jaw presenting a gripping roller integral with a respective planetary gear of an epicyclic drive wherein each planetary gear is barrel-shaped and presents teeth in turn presenting a convex longitudinal profile and meshing permanently with a straight-toothed outer ring gear regardless of the position of the relative jaw.