Abstract: The present invention relates to a screwing/rolling head 1 for screwing and sealing a pre-threaded cap 5 on to a threaded neck 6 of a container 7, the head 1 having a cap pressing member 4 capable of engaging the cap 5 and screwing it on to the container 7. The said cap pressing member 4 is associated for operation with a body 2 of the head 1 in such a way that it can be moved with respect to the body 2 between a first contracted configuration and a second extended configuration, in which the movement is rotary-translational with only one degree of freedom. The present invention also relates to a head 1 in which asymmetrical clutch means 18 are interposed between the cap pressing member 4 and the body 2, and a head 1 in which the body 2 comprises a first element 8 and a second element 9 connected to it with respect to rotation by means of a disengageable torque limiter 24.

Abstract: The present invention relates to a screwing/rolling head 1 for screwing and sealing a pre-threaded cap 5 on to a threaded neck 6 of a container 7, the head 1 having a cap pressing member 4 capable of engaging the cap 5 and screwing it on to the container 7. The said cap pressing member 4 is associated for operation with a body 2 of the head 1 in such a way that it can be moved with respect to the body 2 between a first contracted configuration and a second extended configuration, in which the movement is rotary-translational with only one degree of freedom. The present invention also relates to a head 1 in which asymmetrical clutch means 18 are interposed between the cap pressing member 4 and the body 2, and a head 1 in which the body 2 comprises a first element 8 and a second element 9 connected to it with respect to rotation by means of a disengageable torque limiter 24.