Containers (2) having a threaded neck (3) and a mouth (4) are capped by a unit (1) appearing as a carousel (5) equipped with capping heads caused to advance 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...http://www.google.de/patents/US7082739?utm_source=gb-gplus-sharePatent US7082739 - Centering and holding unit for capping head
