| 摘要 |
Valve bags with a first and a second bottom, the first bottom being provided with a filling valve. By folding the valve bag symmetrically with two opposite folds at each end, arranged in such a way that the bottoms are placed relatively close to each other within the outline of the folded bag, the bag is simple to stack in a vertical and stable stack, from which it may be lifted at both ends by means of an applicator transporting the bag to the spout of a filling apparatus. In a method, in which an extra fold, at a short distance from the outer fold, is made, opposite the outer fold, the outer fold may be pressed sharply by means of pressing means acting in a plane perpendicular to the plane of the bag, squeezing and possible uncured adhesive from the gluings in the bottoms being thus avoided. |
