Method for attaching a shoulder element to a bag
First Claim
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1. A method for manufacturing bag tubes, said method comprising the steps of:
- folding a web of film material about a longitudinal fold line, laying sections of the web on one another, along strips which are arranged as a distance from one another, and which run transversely to the fold line, connecting the sections to one another in order to form a row of pockets, cutting a hole in each pocket in the region of the fold line, then introducing into each pocket a shoulder piece comprising a closable outlet piece and a flange projecting from the outlet piece, by inserting the outlet piece of the shoulder piece through the hole, connecting the shoulder piece to the film material, closing the outlet piece of the shoulder piece, then filling the pocket from the open end and closing the open end, wherein for cutting the hole into each pocket, the film material of the pocket in the region of the fold line is shaped and clamped between two shaping parts and then in one of the shaping parts a knife is displaced and moved to a counter knife on the other shaping part.
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Abstract
A web of film is folded lengthwise, and its superposed sections are joined together along transverse lines to form a series of pockets. A hole is then cut in each pocket near the fold line. The film is shaped and clamped between two curved shaping parts, and a blade in one of the parts is advanced toward a counter blade on the other part. A shoulder element having a pouring spout and a flange is introduced into the pocket and the spout is inserted through the hole, whereafter the flange is joined to the pocket.
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Citations
7 Claims
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1. A method for manufacturing bag tubes, said method comprising the steps of:
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folding a web of film material about a longitudinal fold line, laying sections of the web on one another, along strips which are arranged as a distance from one another, and which run transversely to the fold line, connecting the sections to one another in order to form a row of pockets, cutting a hole in each pocket in the region of the fold line, then introducing into each pocket a shoulder piece comprising a closable outlet piece and a flange projecting from the outlet piece, by inserting the outlet piece of the shoulder piece through the hole, connecting the shoulder piece to the film material, closing the outlet piece of the shoulder piece, then filling the pocket from the open end and closing the open end, wherein for cutting the hole into each pocket, the film material of the pocket in the region of the fold line is shaped and clamped between two shaping parts and then in one of the shaping parts a knife is displaced and moved to a counter knife on the other shaping part. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification