DEVICE FOR PRODUCING A SCORING LINE IN THE CYLINDRICAL WALL OF A PLASTIC CUP, PARTICULARLY OF A PLASTIC CUP FOR CLOSING A CONTAINER, AND MACHINE USING SAID DEVICE

摘要

A device for producing a scoring line in the cylindrical wall of a plastic cup, comprising: a mandrel (8), provided with elements for positioning and retaining a cup applied thereon; a plurality of jaws (24), an end whereof is articulated to the mandrel (8) so as to oscillate on radial planes; respective circular arc-shaped blades (30) being applied to the opposite end of the jaws and being arranged on a plane which is perpendicular to the axis of the mandrel; actuation elements for the jaws being further provided, as well as elements for actuating the mandrel (8) with respect to the actuation means so as to actuate the arc-shaped blades (30) radially from a position which is external to the cup (11) to a position for engaging the wall of the cup at which the blades (30) form a scoring line in the wall.