An object centering device configured to center a conveyed food container includes a restricting guide member having a pair of guide surfaces facing the food container and configured to be respectively in contact with at least a pair of opposed contact portions. The pair of guide surfaces of the restricting guide member includes front end portions that extend away from each other toward a downstream side of a conveyance direction of the food container. The front end portions are configured such that an angle formed by the pair of guide surfaces is changeable.

This disclosure relates to a labelling machine (1), comprising a carousel (3) rotatably mounted a supporting frame (2) in such a way that it can rotate about a first axis of rotation (30) and a plurality of supporting elements (4) for articles to be labelled (9). The supporting elements (4) are mounted on the periphery of the carousel (3) and are able to rotate about respective second axes of rotation (40). The machine (1) is characterised in that it comprises an operating unit (55) which is mounted on a rotary support (6) mounted on the supporting frame (2). The support (6) is able to rotate about a third axis of rotation (60) which is at a distance, along a radial line, from the first axis of rotation (30). The carousel (3) is movable relative to the third axis of rotation (60) and the operating unit (55), which is rotatable together with the rotary support (6), is designed to perform an operation on a lateral surface of an article (9) which is on its operating line when the article (9), positioned on a respective supporting element (4), passes near to the operating unit (55) during the rotation of the carousel (3). The rotation of the rotary support (6) about the third axis of rotation (60) is coordinated with the rotation of the carousel (3) about the first axis of rotation (30), whereby, in use, the rotation of the rotary support (6) about the third axis of rotation (60) keeps the operating unit (55) with the operating line towards the article to be labelled (9) along a stretch of angular movement of the carousel (3) about the first axis of rotation (30).

This disclosure relates to a labelling machine (1), comprising a carousel (3) rotatably mounted a supporting frame (2) in such a way that it can rotate about a first axis of rotation (30) and a plurality of supporting elements (4) for articles to be labelled (9). The supporting elements (4) are mounted on the periphery of the carousel (3) and are able to rotate about respective second axes of rotation (40). The machine (1) is characterised in that it comprises an operating unit (55) which is mounted on a rotary support (6) mounted on the supporting frame (2). The support (6) is able to rotate about a third axis of rotation (60) which is at a distance, along a radial line, from the first axis of rotation (30). The carousel (3) is movable relative to the third axis of rotation (60) and the operating unit (55), which is rotatable together with the rotary support (6), is designed to perform an operation on a lateral surface of an article (9) which is on its operating line when the article (9), positioned on a respective supporting element (4), passes near to the operating unit (55) during the rotation of the carousel (3). The rotation of the rotary support (6) about the third axis of rotation (60) is coordinated with the rotation of the carousel (3) about the first axis of rotation (30), whereby, in use, the rotation of the rotary support (6) about the third axis of rotation (60) keeps the operating unit (55) with the operating line towards the article to be labelled (9) along a stretch of angular movement of the carousel (3) about the first axis of rotation (30).

An object centering device configured to center a conveyed food container includes a restricting guide member having a pair of guide surfaces facing the food container and configured to be respectively in contact with at least a pair of opposed contact portions. The pair of guide surfaces of the restricting guide member includes front end portions that extend away from each other toward a downstream side of a conveyance direction of the food container. The front end portions are configured such that an angle formed by the pair of guide surfaces is changeable.

A labelling machine with a carrousel comprises a carrousel (3) and a plurality of plates (4), mounted on the carrousel (3). Each plate (4) comprises supporting means (13) and a dragging element (14), comprising a tooth (15) substantially insertable in a recess made in the bottom of the container supported by the supporting means (13). The tooth (15) is off-centre relative to the first axis of rotation and movable relative to the supporting means (13) between an engaged position, in which the tooth (15) is substantially inserted in the recess, and a disengaged position, in which the tooth (15) is not associated with the recess. The machine (1) comprises for each plate (4) coupling means (41), operatively associated with the tooth (15), for coupling the supporting means (13) to the carrousel (3) when the tooth (15) is in the disengaged position, obstructing rotation of the supporting means (13) relative to the carrousel (3), and for uncoupling the supporting means (13) from the carrousel (3) when the tooth (15) is in the engaged position, allowing substantially free rotation of the supporting means (13) relative to the carrousel (3).