Back to results
US 2010/0167893 A1Published application
Method for manufacturing a bag pack
AssigneeIps Industries, Inc.
InventorsJack Randal Wilkerson, Robert D. Bailey, Tien Tjiu Tan
Life of this patent
Estimating the term…
Abstract
In an embodiment of the invention, a bottom seal of a plastic bag is strengthened by welding together 8 layers of plastic film. In one respect, an embodiment of the invention provides a method for manufacturing a bag pack that includes folding a 4-layered structure into an 8-layered structure, welding a bottom edge, and then unfolding the 8-layered structure before stacking 4-layered bags into a bag pack.
Claims17
A method for manufacturing a bag pack, comprising:
- forming a plurality of gusseted side walls in a polyethylene tube to produce a gusseted portion, each of the plurality of gusseted side walls substantially meeting in a center of the polyethylene tube, the gusseted portion being a 4-layered structure;
- folding the gusseted portion along a longitudinal axis to produce a folded portion, the folded portion being an 8-layered structure;
- welding a bottom edge of the folded portion to produce a bottom weld;
- cutting the folded portion to separate a folded bag from the folded portion, the folded bag including the bottom weld, the folded bag having 8 layers;
- welding at least a portion of a top edge of the folded bag;
- at least partially unfolding the folded bag to produce an unfolded bag;
- and
- stacking the unfolded bag onto another unfolded bag to produce a pack of uncut bags.
5 more elements
Dependencies are inferred from the claim text.