Bag-producing apparatus and method of producing foil bags
AssigneeINDAG GmbH & Co. Betriebs-KG
InventorsHans-Peter Wild, Eberhard Kraft
Life of this patent
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Abstract
The present invention relates to a method of producing foil bags, wherein at least two foils are supplied that serve as side foils of the foil bags, the foils are connected to each other and then cut into individual foil bags, wherein possibly existing differences in the amounts of foil materials provided by the at least two foils in the feed direction for a respective foil bag are eliminated by stretching the foil that provides the smaller amount of foil material for a foil bag, and to a bag-producing apparatus for performing the method.
Claims18
A method of producing foil bags wherein at least two foils are supplied that serve as side foils of the foil bag, the foils are placed one upon the other and are connected to each other at at least a pair of future side edges of the foil bag, and the foils interconnected in this way are discharged and cut to form individual foil bags, and wherein differences in the amounts of foil materials respectively provided by the at least two foils in a feed direction for a respective foil bag are eliminated by stretching the foil that provides a smaller amount of foil material for a foil bag than the other foils, the stretching being accomplished by holding the foil to be stretched for a short period of time at at least two holding points, and by simultaneously increasing the foil tension between the at least two holding points.
A bag-producing apparatus comprising at least one first and second foil feed means, a means for connecting the individual foils, a discharge means for discharging the connected foils, a cutting means for cutting the connected foils into individual foil bags, a measuring means for sensing the amount of foil material provided for producing a foil bag, and a respective stretching means for each of the at least two foils supplied, which stretching means is configured to stretch the respective foil in response to a signal from the measuring means, the stretching means incorporating at least two clip means that are spaced apart in a transportation direction of the foil, the clip means being designed to act upon the supplied foil at at least two spaced-apart holding points, as well as a stretching mechanism designed to deflect the supplied foil the entire foil width between the holding points.
Dependencies are inferred from the claim text.