A capping head for applying caps on containers or bottles and a capping assembly are provided. The capping head comprises a gripping assembly having a hollow body longitudinally extending along a vertical axis and internally defining a seat for the cap, the seat being delimited at its lower end by an inlet mouth for the introduction of the cap. A moving assembly is connected to the gripping assembly for controlling the movements thereof and is hermetically separated therefrom, and an ejector member is housed inside the hollow body of the gripping assembly, in such a manner that it is free to axially slide. The ejector member carries first and second magnetic elements such that a relative axial approach of the second magnetic element towards the first magnetic element results in a translation of the ejector member towards the lower inlet mouth of the gripping assembly.

A method for closing receptacles (2), comprising steps of: in a controlled-contamination environment (6) having a volume that extends into a restricted zone about the neck (2b) of the receptacles, resting and pressing a closure (10) onto a mouth (2a) of each receptacle (2); screwing the capsule (10) onto the neck (2b) of the corresponding receptacle (2) externally of the controlled contamination environment (6).

Closing machine for closing bottles or similar containers (2) using closures (3, 3a), having a plurality of closing stations (11) which each have a closing tool (12, 14) and a container carrier and are formed on the circumference of a rotor (4), which can be driven in circulation around a vertical machine axis (MA), wherein the rotor (4) has formed on it, in the region of the closing stations (11), a sterile chamber (5) which is bounded in the direction of the surroundings by walls or wall portions (6, 7, 8, 9) and into which the containers (2), which are retained in a hanging state on the container carriers, extend by way of their container mouth (2.1) which is to be closed, and wherein the respective closing tool (12, 14) extends into the sterile chamber (5) merely by way of a part which interacts with the container (2) which is to be closed and/or with the closure (3, 3a), all the rest of its functional elements being arranged outside the sterile chamber (5).

A gripping assembly for a capping head for applying caps on containers, as well as a capping head, are provided. The gripping assembly comprises a hollow body longitudinally extending along a vertical axis and internally defining a seat delimited at its lower end by an inlet mouth for the introduction of a cap. An ejector member is housed inside the hollow body such that the ejector member is free to slide axially. The gripping assembly further comprises a suspension member made of magnetic material or magnetizable material, and the ejector member carries a first magnetic element that interacts with the suspension member to determine a suspension condition of the ejector member. The magnetic interaction between the first magnetic element and the suspension member is such that the suspension condition is determined only when the ejector member is brought in close proximity of or, in contact with, the suspension member.

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 capping head for the application of caps on containers or bottles, as well as a capping assembly, are provided. The capping head comprises a hollow housing internally defining at least a first chamber in which a shaft rotating about a longitudinal axis is housed, the rotating shaft being coupled with the hollow housing through the interposition of a magnetic or electromagnetic decoupling assembly comprising at least a rotor and a stator. The decoupling assembly being suitable to allow a relative rotation between the hollow housing and the rotating shaft when the rotating shaft is subjected to a braking torque exceeding a threshold torque. Means for enhancing the thermal dissipation power generated by the decoupling assembly is located inside the hollow housing.

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 capping plant (10) for capping containers (100) made of thermoplastic material, comprising: a capping unit (11) of a rotating carousel type comprising a plurality of capping stations (111) and first guide means (14) arranged so as to contact a part of a tubular body (100a) of the containers (100) which is exposed towards an outside of the rotating carousel of the capping unit (11); a star-wheel (12) located downstream of the capping unit (11); an outfeed conveyor (13) located downstream of the star-wheel (12); a connection cross-member (17) between said first guide means (14) and the outfeed conveyor (13), the outfeed conveyor (13) being integrally constrained to a first portion (17a) of the connection cross-member (17) and the first guide means (14) being integrally constrained to a second portion (17b) of the connection cross-member (17); an actuating device (18) configured to adjust the height of said connection cross-member (17).

A spindle-shaft unit for closing containers with a screw closure includes a spindle that is rotatable and axially movable relative to a housing and a bearing unit arranged between the housing and the spindle. The bearing unit comprises a sliding bearing that interacts with the spindle and a further bearing that interacts with the sliding bearing. The spindle is arranged at the sliding bearing such as to be displaceable and non-rotatable relative to the sliding bearing. The further bearing secures the sliding bearing so as to be rotatable and non-displaceable relative to the housing.

A device for capping a container with a container cap, for example in a beverage filling plant, includes an isolator for providing a defined atmosphere in the interior thereof; a capper for capping a container with a container cap, which capper is arranged in the isolator; and a cap production device for producing container caps from a hot melt, for example a plastics melt. The cap production device is arranged outside the isolator, and is interconnected with the isolator or is connected to the isolator via a cap transport tunnel in order to feed produced container caps to the capper.