An apparatus for weighing containers moved by a transporting arrangement along a path in a weighing station includes a transferring arrangement for transferring containers from the transporting arrangement to the weighing station and vice versa. The transferring arrangement is driven so as to move a
An apparatus for weighing containers moved by a transporting arrangement along a path in a weighing station includes a transferring arrangement for transferring containers from the transporting arrangement to the weighing station and vice versa. The transferring arrangement is driven so as to move at least a container to be weighed away from an upstream row of containers for taking at least a container to be weighed to the weighing station, maintaining the container to be weighed in the weighing station for a time necessary for detecting the weight of the container to be weighed, and moving the weighed container towards a downstream row of containers.
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1. Apparatus for weighing containers moved by first and second transporting arrangements along a path in a weighing station, comprising a transferring arrangement for transferring all containers from said transporting arrangement to said weighing station and from said weighing station to said second
1. Apparatus for weighing containers moved by first and second transporting arrangements along a path in a weighing station, comprising a transferring arrangement for transferring all containers from said transporting arrangement to said weighing station and from said weighing station to said second transporting arrangement, wherein said transferring arrangement is driven so as to move at least a container to be weighed away from an upstream row of containers for taking said container to be weighed to said weighing station, stopping and maintaining said container to be weighed in said weighing station for a time necessary for detecting the weight of said container to be weighed, and moving said weighed container towards a downstream row of containers, said transferring arrangement comprising a plurality of gripping elements each of which is suitable for supporting at least a container, wherein said apparatus comprises a driving device arranged for independently moving said gripping elements at different angular speeds. 2. Apparatus according to claim 1, wherein said gripping elements are driven independently so that in an operating interval of said apparatus, in which at least a container is advanced by said transporting arrangement, said gripping elements simultaneously removing a container to be weighed from a first transporting arrangement, maintaining a further container to be weighed on a weighing device of said weighing station and transferring at least a weighed container to a second transporting arrangement. 3. Apparatus according to claim 2, comprising a first conveying arrangement for removing said containers to be weighed from said first transporting arrangement and conveying said containers to be weighed to said transferring arrangement. 4. Apparatus according to claim 3, comprising a second conveying arrangement for receiving said weighed containers from said transferring arrangement and for conveying said weighed containers to said second transporting arrangement. 5. Apparatus according to claim 4, wherein said conveying arrangement comprises respective conveying discs rotating around respective axes and peripherally provided with a plurality of housings that are angularly spaced apart from one another and are suitable for receiving said containers. 6. Apparatus according to claim 5, wherein said conveying discs are rotated at an angular speed that is such as to move the containers received in said housings at a peripheral speed that is substantially the same as an advance speed of said containers on said transporting arrangement. 7. Apparatus according to claim 5, wherein said conveying discs move said containers along arched trajectories that substantially coincide with portions of pitch circumferences of said conveying discs. 8. Apparatus according to claim 7, wherein said gripping elements are movable around a rotation axis so as to move said containers along a substantially circular trajectory and which is substantially tangent to said pitch circumferences of said conveying discs. 9. Apparatus according to claim 8, wherein each gripping element has a shape of a circular sector and is provided on a peripheral edge with at least a seat that is suitable for receiving a container. 10. Apparatus according to claim 9, wherein each gripping element is provided on said peripheral edge with a plurality of seats that are angularly spaced apart from one another. 11. Apparatus according to claim 9, wherein each gripping element comprises a retaining arrangement for removably locking each container to the respective seat during the operation of said apparatus. 12. Apparatus according to claim 11, wherein said retaining arrangement comprises a suction hole made on said seat and connected to a suction device by a conduit. 13. Apparatus according to claim 12, wherein said retaining arrangement further comprises an adjusting arrangement interposed between said suction hole and said conduit for selectively opening or closing the connection to said suction device, so as to enable a corresponding gripping element respectively to remove and retain, or release, said containers. 14. Apparatus according to claim 8, wherein each gripping element is rotated in an operating interval by a first angle at a substantially constant angular speed and such as to enable said gripping element to remove at least a container to be weighed from said first conveying arrangement. 15. Apparatus according to claim 8, wherein each gripping element is rotated in an operating interval by a second angle at a variable angular speed so as to move said container to be weighed from said first conveying arrangement to said weighing station. 16. Apparatus according to claim 8, wherein each gripping element in an operating interval is stopped for a weighing time that is necessary for said weighing station to weigh said container and then is rotated by a third angle at a variable angular speed so as to move said weighed container from said weighing station to said second conveying arrangement. 17. Apparatus according to claim 8, wherein each gripping element is rotated in an operating interval by a fourth angle at a substantially constant angular speed and so as to enable said gripping element to transfer said weighed container to said second conveying arrangement. 18. Apparatus according to claim 1, comprising a positioning arrangement for transferring at least a container from a gripping element to a weighing device of said weighing station and vice versa. 19. Apparatus according to claim 18, wherein said weighing device comprises at least a weighing cell. 20. Apparatus according to claim 18, wherein each gripping element is provided on said peripheral edge with a plurality of seats that are angularly spaced apart from one another and wherein said weighing device comprises a number of weighing cells equal to the number of said plurality of seats of each gripping element. 21. Apparatus according to claim 1, wherein said transporting arrangement moves said containers with continuous motion at a set advance speed. 22. Apparatus according to claim 1, wherein said transporting arrangement moves said containers with indexed intermittent motion at a set advance speed. 23. Method for weighing containers, moved by a first and second transporting arrangements along a path, in a weighing station, comprising the steps of transferring all containers from said first transporting arrangement to said weighing station and from said weighing station to said second transporting arrangement by a transfer arrangement that includes a plurality of gripping elements, each of which is suitable for supporting at least a container, wherein said transferring comprises moving at least a container to be weighed to said weighing station, stopping and maintaining said container to be weighed in said weighing station for a time necessary for detecting the weight of said container to be weighed, moving said weighed container towards a downstream row of containers, wherein said gripping elements are moved independently by a driving device at different angular speeds. 24. Method according to claim 23, wherein said moving away step comprises deviating said containers from a substantially rectilinear path of said transporting arrangement. 25. Method according to claim 23, wherein moving said rows of containers by said transporting arrangement with a continuous or indexed intermittent advancing motion is provided. 26. Method according to claim 25, wherein moving said rows of containers at a defined advance speed is provided. 27. Method according to claim 23, wherein said moving away, maintaining and moving towards steps are performed simultaneously in a same operating interval. 28. Method according to claim 27, wherein moving said rows of containers by said transporting arrangement with a continuous or indexed intermittent advancing motion is provided and wherein said moving said rows of containers comprises advancing said rows of containers at each interval of time by a number of containers equal to the number of containers that it is intended to move away, maintain and move towards. 29. Method according to claim 27, wherein said moving away step comprises removing a plurality of containers to be weighed from said upstream row moved by a first transporting arrangement and transferring said plurality of containers to be weighed to said weighing station. 30. Method according to claim 27, wherein said maintaining step comprises transferring a further plurality of containers to be weighed on a weighing device of said weighing station for a weighing time that is necessary for said weighing device to weigh said further plurality of containers to be weighed. 31. Method according to claim 30, wherein said weighing time is less than said operating interval. 32. Method according to claim 27, wherein said moving towards step comprises removing a plurality of containers to be weighed from said weighing station and transferring the plurality of containers to be weighed to a second transporting arrangement arranged for supporting and moving said downstream row of containers.
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