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US 2020/0140177 A1Published application
Woven Plastic Bags With Features That Reduce Leakage, Breakage and Infestations
AssigneePolytex Fibers Corporation
InventorsJacobo Bazbaz, Alberto Zaroli
Life of this patent
Estimating the term…
Abstract
A woven laminated plastic bag having features that further prevent leakage of contents out of the bag, or infestation of organisms into the contents of the bag is provided. In various aspects the bag can be fabricated from woven polypropylene and/or polyethylene layer which can be laminated with a film layer, can form a pinch bottom bag, and can have one or both sides include graphics and/or printing. The bag can also provide a top end and/or a bottom end either or both of which provide a discrete area which may contain discrete graphics and/or printing. The bag can also include a tape covered easy open feature that facilitates removal of tightly adhered sealing tape.
Claims32
A method of manufacturing a bag, said method comprising:
- (a) providing a continuous sheet of material, wherein the material comprises at least three laminated layers, said layers comprising a first layer comprising woven strips comprising oriented polypropylene, a second layer comprising an oriented film comprising polypropylene, and a third layer comprising a film comprising polypropylene, wherein the third layer laminates the first and second layers;
- (b) cutting an individual bag blank from the continuous sheet;
- (c) forming said individual blank into a bag having a top end and a bottom end, a first wall, a second wall, a first side wall, and a second side wall wherein the first and second side walls are disposed on opposite sides of the first and second walls and connect the first wall to the second wall;
- (d) cutting the first layer, the second layer, and the third layer of either the first wall or the second wall of the bag with a plurality of cuts, wherein the plurality of cuts define a shape comprising at least one row extending parallel to the top or bottom edge of the bag across a portion of the first wall or the second wall;
- (e) applying a strip of sealing tape to the surface of the first or second wall and wherein the sealing tape covers the plurality of cuts;
- wherein the tape comprises:
- a length, a width, a bottom surface comprising an adhesive and a top surface,
- a first end and a second end at opposite sides of the length of the sealing tape,
- a first edge and a second edge at opposite sides of the width of the sealing tape,
- a top surface and a bottom surface, and wherein the bottom surface comprises an adhesive,
- a first edge and a second edge on opposite sides of the width of the sealing tape;
- a first portion of the sealing tape comprising an outer edge and an inner edge wherein the outer edge of the first portion of the sealing tape is the first edge of the sealing tape and the inner edge of the first portion of the sealing tape is a first edge of the third portion of the sealing tape;
- a second portion of the sealing tape comprising an outer edge and an inner edge wherein the outer edge of the second portion of the sealing tape is the second edge of the sealing tape and the inner edge of the second portion of the sealing tape is a second edge of the third portion of the sealing tape;
- and
- a third portion of the sealing tape disposed at least in part between and in contact with the inner edge of the first portion of the sealing tape and the inner edge of the second portion of the sealing tape;
- wherein the first, second and third portions of the sealing tape each comprise a first end and a second end;
- wherein the sealing tape is adapted such that when the tape is adhesively attached to a surface, pulling up on an end of the third portion of the sealing tape is effective to separate at least a portion of the third portion of the sealing tape from the surface while leaving the adjacent first and second portions of the sealing tape adhered to the surface;
- and
- sealing the top or bottom end of the bag, wherein the bag is adapted to be filled with at least ten pounds by weight of at least one filling material, and the second end of the bag is adapted to be sealed after the bag has been filled.
16 more elements
A method of manufacturing a bag, said method comprising:
- (a) providing a continuous sheet of material, wherein the material comprises at least three laminated layers, said layers comprising a first layer comprising woven strips comprising oriented polyethylene, a second layer comprising an oriented film comprising polyethylene, and a third layer comprising a film comprising polyethylene, wherein the third layer laminates the first and second layers;
- (b) cutting an individual bag blank from the continuous sheet;
- (c) forming said individual blank into a bag having a top end and a bottom end, a first wall, a second wall, a first side wall, and a second side wall wherein the first and second side walls are disposed on opposite sides of the first and second walls and connect the first wall to the second wall;
- (d) cutting the first layer, the second layer, and the third layer of either the first wall or the second wall of the bag with a plurality of cuts, wherein the plurality of cuts define a shape comprising at least one row extending parallel to the top or bottom edge of the bag across a portion of the first wall or the second wall;
- (e) applying a strip of sealing tape to the surface of the first or second wall and wherein the sealing tape covers the plurality of cuts;
- wherein the tape comprises:
- a length, a width, a bottom surface comprising an adhesive and a top surface,
- a first end and a second end at opposite sides of the length of the sealing tape,
- a first edge and a second edge at opposite sides of the width of the sealing tape,
- a top surface and a bottom surface, and wherein the bottom surface comprises an adhesive,
- a first edge and a second edge on opposite sides of the width of the sealing tape;
- a first portion of the sealing tape comprising an outer edge and an inner edge wherein the outer edge of the first portion of the sealing tape is the first edge of the sealing tape and the inner edge of the first portion of the sealing tape is a first edge of the third portion of the sealing tape;
- a second portion of the sealing tape comprising an outer edge and an inner edge wherein the outer edge of the second portion of the sealing tape is the second edge of the sealing tape and the inner edge of the second portion of the sealing tape is a second edge of the third portion of the sealing tape;
- and
- a third portion of the sealing tape disposed at least in part between and in contact with the inner edge of the first portion of the sealing tape and the inner edge of the second portion of the sealing tape;
- wherein the first, second and third portions of the sealing tape each comprise a first end and a second end;
- wherein the sealing tape is adapted such that when the tape is adhesively attached to a surface, pulling up on an end of the third portion of the sealing tape is effective to separate at least a portion of the third portion of the sealing tape from the surface while leaving the adjacent first and second portions of the sealing tape adhered to the surface;
- and
- sealing the top or bottom end of the bag, wherein the bag is adapted to be filled with at least ten pounds by weight of at least one filling material, and the second end of the bag is adapted to be sealed after the bag has been filled.
16 more elements
Dependencies are inferred from the claim text.