Automatic welding machine (patented) for the production of bags with bottom seal, synchronisation and tension control by means of brushless servo-motors managed by custom software, functions controlled by touch-screen operator panel, reel-holding unit with one or two reels with hydraulic lift to grip the reels on the ground, also available without internal shaft (shaft-less version). Bag stacking by means of a double presser system without needles, gripper collection table which, depending on the length of the bags and production requirements, can perform transversal folding of the bags in twice their length.
In the version dedicated to industrial bags the machine is equipped with a gusset pre-welding unit, a double feeding roller in electric axis to prevent the pre-seals from stretching and a cooling system and separation of the seals during the stacking to avoid bags from sticking to one another.