Method and device for folding the closed mouthportion of a filled bag, and a bag thus obtained.

摘要

After the flattening by bellows of the material of tubular development of the mouth of the bag, the latter undergoes a first fold (12) in one direction at the base and a second fold (14) in the opposite direction at a distance from the base which is not greater than half the overall height dimension of said flattened mouth; a third fold (22) is imposed on the end portion of the mouth, with straightening of the first fold (12); this is followed by the turning down of the mouth folded to double thickness, until against the filled bag (S). <IMAGE>