Film bag
AssigneeMondi Jackson, Inc.
InventorMark Gum
Life of this patent
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Abstract
A film bag has a pair of longitudinally extending film face panels having longitudinal edges and first and second folded film gussets having longitudinal edges welded at longitudinal seams to respective longitudinal edges of the face panels and formed with two spaced throughgoing cuts forming a handle loop. A separate film inner liner panel lies against an inner face of the first gusset, extends a full transverse width of the first gusset, and is fixed at the longitudinal welds of the first gusset to the front panels so that the liner prevents leakage from the bag through the cuts.
Claims16
A film bag comprising:
- a pair of longitudinally extending film face panels having longitudinal edges;
- first and second folded film gussets having longitudinal edges welded at longitudinal seams to respective longitudinal edges of the face panels and having two spaced throughgoing cuts forming a handle loop;
- and
- a separate film inner liner panel lying against an inner face of the first gusset, extending a full transverse width of the first gusset, and fixed at the longitudinal welds of the first gusset to the front panels, whereby the liner prevents leakage from the bag through the cuts.
A method of making a film bag, the method comprising the steps of:
- feeding a first weldable plastic film longitudinally in a travel direction;
- forming a plurality of tube sections each having an inner layer of weldable plastic film and an outer layer extending over at least half of the inner layer;
- forming in only the outer layer of each of the tube sections a pair of spaced handle-forming cuts;
- applying the tube sections one after the other at a longitudinal spacing to the first film with the tube sections extending transversely of the first film;
- applying to the first film atop the tube sections a second weldable film and advancing it longitudinally with the first film;
- welding together longitudinally extending edges of the first and second films and ends of the tube sections;
- forming at each of the tube sections a pair of longitudinally spaced transverse welds with the outer layer of each tube section substantially to one longitudinal side of the pair of welds;
- and
- transversely cutting across the first and second films at the tube sections and between the pair of transverse welds to longitudinally subdivide the films and tube sections into individual film bags.
Dependencies are inferred from the claim text.