| 摘要 |
<p>Method for the manufacturing of erect flexible containers starting from a flat, heat-sealable sheet, which comprises, amongst others, the following stages: folding the sheet in a triple fold, to define two side walls with a different height and a lower transverse wall; folding one side towards the other, to make an upper downward fold and an upper upward fold, with the edges of both sides remaining flush; joining by welding lateral portions with the lower and upper transverse walls, as well as said lateral portions, in respective vertical welding strips, to form a receptacle equipped with a provisional upper mouth; cutting free upper portions of both lateral portions, to form a mouth neck; cutting the sheet through the vertical welding strips, to separate the receptacle from the sheet; filling the container by introducing the product to be stored through said provisional mouth; and joining by welding the perimeter edges of the mouth neck.</p> |
