Patent ID: 6941724
Filing Date: 2005-09-13
Classification: B65B,B67B

Abstract:
1. A capping head for use with a rotary capping machine, the capping head comprising: a housing; a spindle supported in the housing for rotation therewith, the spindle defining a longitudinal axis; a first ring of magnets fixed within the housing and having a first diameter; and a second ring of magnets coupled to the spindle for co-rotation with the spindle such that relative rotation between the spindle and the second ring of magnets is substantially prevented, the second ring of magnets being movable in the longitudinal direction with respect to both the spindle and the first ring of magnets, and the second ring of magnets having a second diameter different from the first diameter such that the first and second rings can achieve a plurality of nested positions with respect to one another to define a magnetic torque coupling between the housing and the spindle.