Bag and method of making the same
AssigneeThe Glad Products Company
InventorsRobert W. Fraser, Kyle R. Wilcoxen
Life of this patent
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Abstract
The plastic bag may include flexible thermoplastic sidewalls that have a pattern imparted onto them. The wrinkle pattern may be a plurality of linear ribs formed into the sidewall that may be arranged adjacent and parallel to one another. To impart the pattern to the sidewall, a thermoplastic web used to make the sidewall may be directed between a first cylindrical roller and a second cylindrical roller, each of which may have a plurality of spaced ridges extending about their peripheries. When the web is directed between the first and second rollers, the meshing of the ridges may form ribs into the web.
Claims9
A method of forming thermoplastic bags comprising:
- advancing a continuous web of flexible thermoplastic material along a machine direction, the continuous web of flexible thermoplastic material having an initial width in a transverse direction measured between a first side edge and a second side edges, the web having an initial average thickness;
- folding the continuous web of flexible thermoplastic material by bringing the first side edge toward the second side edge thereby reducing the initial width;
- passing at least a portion of the folded continuous web of flexible thermoplastic material through a pair of intermeshing cylindrical rollers causing the intermeshing cylindrical rollers to stretch only a portion of the folded continuous web of flexible thermoplastic material in the transverse direction and thereby imparting a pattern of a plurality of parallel linear ribs to the stretched portion of the folded continuous web of flexible thermoplastic material;
- and
- using the stretched, ribbed, and folded continuous web of flexible thermoplastic material to form a thermoplastic bag.
Dependencies are inferred from the claim text.