A METHOD FOR FORMING BAGS IN PLASTIC MATERIAL AND THE BAG THUS PRODUCED

摘要

The method for making bags (20) out of plastic material comprises the cutting of individual portions (11) from a roll (10) of a tubular element and the simultaneous making of a bottom seam (12) crosswise to the tubular element itself. Each portion (11) is set up so as to form a bag with a filling opening (13) at the opposite end of the bottom seam (12). The extremities of the bottom of the bag are pressed down so as to form angular sections (14) which are sealed by means of seams (15) made crosswise to the bottom seam (12) and folded back against the external surface of the bag. The filling opening (13) is sealed by a crosswise top seam (22) after the bag has been filled with the relevant products (18). Angular sections (24) are then defined at the extremities opposite to the top of the bag. The angular sections (24) are sealed by means of seams (25) made crosswise to the top seam (22) and folded back against the external surface of the bag.