Patent ID: 8016538
Filing Date: 2011-09-13
Classification: B65B,Y10S

Abstract:
1. A station for weighing containers provided in an apparatus for filling containers, which apparatus comprises a transport line of the containers to be filled with a predetermined product, and a dosing and filling zone for dosing and filling the containers with the product along the transport line, the station being characterized in that it comprises one single organ for weighing the containers which are arranged in proximity of the transport line; a first transferring organ for picking up an individual empty container from the line, for transferring the container to the weighing organ and, after weighing the container, returning the container to the line; a second transferring organ, which is activated in a phase relation with activation of the first transferring organ to pick up a filled container downstream of the dosing and filling zone of the containers, a tare weight of the container having been determined previously by a combined action of the first transferring organ and the weighing organ, and transfer the container to the weighing organ and, after weighing the container, relocate the container on the line, the transferring organs respectively comprising an oscillating arm which can be activated with alternated motion between a pick-up position and a release position of the container to be weighed at the transport line, and a position for releasing and picking up the container at the weighing organ; a rotating head which is borne at the free end of the oscillating arm and which is angularly rotated by a relative motor organ, in a suitable phase relation with the motion of the oscillating arm; gripping organs which are borne by the rotating head and grasp the container to be weighed in order to transfer the container from the transport line to the weighing organ and vice versa, the transferring organs comprising a first oscillating arm arranged upstream of the zone for dosing and filling the containers and a second oscillating arm arranged downstream of the zone for dosing and filling the containers, which oscillating arms are angularly rotatable in a horizontal plane for moving the respective rotating head provided with the gripping organs alternatively from a position adjacent to the transport line to a position adjacent to the weighing organ, the gripping organs respectively comprising an arc-shaped element, solidly constrained to the rotating head and exhibiting at opposite ends thereof to a pair of fixed prongs, which cooperate with corresponding mobile prongs hinged to the rotating head.