Abstract: A capping unit (100) for articles such as containers and/or bottles in general, of the type including at least one capping group (3) bearing one or more capping heads (8) for screwing caps (6) or capsules on the articles moved by at least one transport line (4). It includes at least one capping heads store (19), adapted to retain a series of capping heads (8), in order to allow the rapid and automatic exchange and substitution of the spindles (25) of the capping group (3); the capping group (3) being moved by an associated motorization, up to reaching the store (19) such to store and pick up, automatically from the group (3) itself the suitable capping head (8) as a function of the size of the caps (6) or capsules to be screwed.

Abstract: A method for screwing a ring nut of a trigger-shaped (5) pump or trigger (1) on a vessel (6), the pump or trigger being provided with a threaded fixing ring nut (2) by a gripping lever assembly (11). The method includes the steps of: screwing the ring nut on the threaded mouth of the vessel by screwing it to the body until the screwing torque does not reach a preset value; performing a first detachment of elements for tightening the ring nut; rotating the tightening elements (11), by an associated motor, relocating them in their starting configuration, by clearing the trigger by the presence of the levers (11) themselves; lastly, performing a further opening of the tightening elements from the ring nut (2); the driving being necessary for completely opening the gripper and clearing the trigger.

Abstract: A method for screwing a ring nut of a trigger-shaped (5) pump or trigger (1) on a vessel (6), the pump or trigger being provided with a threaded fixing ring nut (2) by a gripping lever assembly (11). The method includes the steps of: screwing the ring nut on the threaded mouth of the vessel by screwing it to the body until the screwing torque does not reach a preset value; performing a first detachment of elements for tightening the ring nut; rotating the tightening elements (11), by an associated motor, relocating them in their starting configuration, by clearing the trigger by the presence of the levers (11) themselves; lastly, performing a further opening of the tightening elements from the ring nut (2); the driving being necessary for completely opening the gripper and clearing the trigger.

Abstract: The invention deals with the field of screwing heads for small trigger-type pumps or triggers and namely for applying, on vessels, triggers equipped with a threaded securing ring nut (2). This screwing head (1) is rotated around a vertical axis through a permanent magnet-type clutch and comprises four rollers (5) which tighten the toothed ring nut (2) when screwing it; said rollers (5) are supported by vertical arms (4) whose axes are arranged at 90° one from the other on a circumference with its center on the rotation axis of the screwing head. The vertical arms (4) and the four rollers (5) are simultaneously carried along a radial direction towards said ring nut through an oscillating movement.

Abstract: The invention deals with the field of screwing heads for small trigger-type pumps or triggers and namely for applying, on vessels, triggers equipped with a threaded securing ring nut (2). This screwing head (1) is rotated around a vertical axis through a permanent magnet-type clutch and comprises four rollers (5) which tighten the toothed ring nut (2) when screwing it; said rollers (5) are supported by vertical arms (4) whose axes are arranged at 90° one from the other on a circumference with its centre on the rotation axis of the screwing head. The vertical arms (4) and the four rollers (5) are simultaneously carried along a radial direction towards said ring nut through an oscillating movement.