The invention relates to a capping machine comprising a protected area from impurities, an unprotected area divided from the protected area by a parting wall, and an operating unit. The operating unit includes a container support element arranged in the protected area, an operating head arranged in the protected area and configured to apply one capsule on the relative container, a motor assembly arranged in the unprotected area and configured to drive motion of the operating head, a torque control head between the motor assembly and the operating head, and an annular bellows element coaxial with the vertical axis and within the protected area and one opposite axial end crossed in a sealed manner by an output shaft of the torque control head. The torque control head is arranged above the parting wall in the unprotected area and the output shaft crosses said opening and the entire bellows element.

A magnetic coupling device (1) is provided for coupling a first member (10) and a second member (11), coaxial with each other, so that they can jointly rotate about a common axis and/or translate along such axis or can perform relative rotary and/or translatory movements depending on the intensity of a torque or an axial force applied to one of the members. At least one of the members (10) has axially extending magnetized areas (12) each consisting of a row of axially aligned magnets (12′), the magnets (12′) in one area (12i) being axially offset relative to the magnets of an adjacent area (12j).

The invention relates to a capping machine comprising a protected area from impurities, an unprotected area divided from the protected area by a parting wall, and an operating unit. The operating unit includes a container support element arranged in the protected area, an operating head arranged in the protected area and configured to apply one capsule on the relative container, a motor assembly arranged in the unprotected area and configured to drive motion of the operating head, a torque control head between the motor assembly and the operating head, and an annular bellows element coaxial with the vertical axis and within the protected area and one opposite axial end crossed in a sealed manner by an output shaft of the torque control head. The torque control head is arranged above the parting wall in the unprotected area and the output shaft crosses said opening and the entire bellows element.

A magnetic screwdriver device includes a pad without magnetism, a driving shaft, and a driven shaft. The two shafts, magnetically attracted to each other, are disposed on opposite sides of the pad. The driving shaft is used to transmit a torque to rotate the driven shaft. When the torque exceeds a predetermined value to overcome a friction force between the driven shaft and the pad, the driven shaft would be stopped.

A magnetic screwdriver device includes one pad without magnetism, one driving shaft, and one driven shaft. The two shafts, which have magnetic attraction between each other, are disposed on opposite sides of the pad respectively and attract to each other. The driving shaft is used to transmit torque to actuate the driven shaft rotation. When the torque out of predetermined value overcomes the friction force between the driven shaft and the pad, the driven shaft will be stop.

A magnetic coupling device (1) is provided for coupling a first member (10) and a second member (11), coaxial with each other, so that they can jointly rotate about a common axis and/or translate along such axis or can perform relative rotary and/or translatory movements depending on the intensity of a torque or an axial force applied to one of the members. At least one of the members (10) has axially extending magnetised areas (12) each consisting of a row of axially aligned magnets (12), the magnets (12) in one area (12i) being axially offset relative to the magnets of an adjacent area (12j).

A magnetic screwdriver device includes one pad without magnetism, one driving shaft, and one driven shaft. The two shafts, which have magnetic attraction between each other, are disposed on opposite sides of the pad respectively and attract to each other. The driving shaft is used to transmit torque to actuate the driven shaft rotation. When the torque out of predetermined value overcomes the friction force between the driven shaft and the pad, the driven shaft will be stop.

A magnetic screwdriver device includes a pad without magnetism, a driving shaft, and a driven shaft. The two shafts, magnetically attracted to each other, are disposed on opposite sides of the pad. The driving shaft is used to transmit a torque to rotate the driven shaft. When the torque exceeds a predetermined value to overcome a friction force between the driven shaft and the pad, the driven shaft would be stopped.