Self Opening Style Bag and Method of Manufacture
AssigneeGateway Packaging Company
InventorsRobert Tiepelman, Bob Gielingh
Life of this patent
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Abstract
A method of manufacturing a self-opening style bag is disclosed, as well as a bag manufactured via the method, where the bottom of the bag has been sealed via application of a hot melt adhesive during in-line bag manufacturing. The disclosure further includes an SOS bag, including a multi-layered SOS bag, having a front panel, a back panel, and a pair of gussets joining the front and back panels, where the SOS bag has been sealed at the bottom via a hot melt adhesive. In an embodiment, the seal is effected via application of adhesive on a front flap and a back flap, and a folding of the front flap and the back flap together to complete the bottom of the bag.
Claims20
A method of manufacturing a bag comprising
- in a first step, providing a gusseted tube of indefinite length, the tube having a front panel and a back panel, the front and back panels joined by a pair of gussets, the tube having an open bottom;
- in a second step, folding the gussets at the bottom of the tube inwardly and folding the front panel of the bag up and back upon itself to create a front flap, the second step thereby creating a back flap, the back flap having two ends;
- in a third step, applying adhesive in a U-shaped pattern to the bottom of the tube such that the adhesive is applied linearly across the back flap and perpendicularly from the ends of the back flap across the gussets and up onto the front flap;
- in a fourth step, folding the front flap along a fold line down onto the gussets;
- and,
- in a fifth step, folding the back flap along a fold line up onto the front flap and gussets;
- wherein the tube provided in the first step comprises multiple layers, the outermost layer being a plastic film layer.
A multi-layered SOS bag, the bag comprising a front panel, a back panel, and a pair of gussets joining the front and back panels, the bag having a closed bottom, where the closed has been sealed via a hot melt adhesive;
- the bag having multiple layers, the outermost layer being a plastic film layer.
A multi-layered bag, where the bag comprises a tube of material of indefinite length, tube comprising a front panel and a back panel, the front and back panels joined by a pair of gussets;
- the tube being multi-layered and comprising an inner film layer, a middle paper layer, and an outer film layer, the tube having a closed bottom;
- wherein the closed bottom of the tube comprises inwardly folded gussets, a front flap, and a back flap, the back flap comprising squared corners;
- the closed bottom further comprising hot melt adhesive adhering the front flap to the folded gussets, and additional adhesive adhering the back flap to the gussets and front flap.
Dependencies are inferred from the claim text.