CENTERING AND HOLDING UNIT FOR CAPPING HEAD

摘要

Containers (2) having a threaded neck (3) and a mouth (4) are capped by a un it (1) appearing as a carousel (5) equipped with capping heads caused to advanc e along a circular path (P) and capable of axial movement toward and away from the containers in such a way that each one can be fitted with a relative cap (11); each capping head of the unit (1) incorporates a gripper (31) furnishe d with two jaws (30) presenting relative conical surfaces (26), and respective cylindrical surfaces (27) designed to locate against the neck (3) of the container. When the cylindrical surfaces (27) register against the outer surface of the neck (3), the conical surfaces (32) are positioned with the lower edges (28) encroaching on the area compassed by the mouth (4) in such a way that the cap (11) can be gathered and aligned with the neck (3) of the container (2) before being tightened, thereby ensuring a precise fit.