Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1995-10-26
1998-05-05
Yoder, Michele K.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156200, 156204, 156227, 156253, 156251, 156267, 156271, 493197, B31B 3360, B32B 3102
Patent
active
057468621
ABSTRACT:
A tube of polyethylene or similar polymeric material having a continuous sidewall is extruded using conventional technology. Two horizontal gussets are formed from the sidewall of the tube, one on each side. The tube is flattened into a substantially flat workpiece. The workpiece is heat sealed at locations predetermined by the configuration of the container in which it is to be inserted. Concurrently with the heat sealing pass, or shortly thereafter, cuts are made to separate manufacturing waste material from the tube. The waste material is recycled into the feedstock of the extruder. The sealed workpiece is split axially into two substantially equal portions, each containing a complete gusset, thereby forming two completed liners.
Alternatively, one horizontal gusset is formed in the sidewall of the tube. As in the first embodiment, the workpiece is heat sealed at locations predetermined by the configuration of the container in which it is to be inserted. The sealed workpiece is split longitudinally on the side opposite of the gusset, thereby forming a completed liner.
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O'Neil Michael A.
Rippamonti Russell N.
Super Sack Mfg. Corp.
Yoder Michele K.
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