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US 2017/0247160 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.
Claims31
A bag comprising:
- a front wall comprising a top end and a bottom end,
- a back wall comprising a top end and a bottom end, and
- a first side wall, and a second side wall disposed on opposite sides of the front and back walls and connecting the front wall to the back wall, forming a bag with a top end and a bottom end, each of the first side wall and the second side wall comprising a gusset with a central fold line extending from the bottom end to the top end of the respective side walls and dividing each of said first side wall and said second side wall into a front side wall and a back side wall;
- wherein each of the front wall, back wall, first side wall and second side wall comprise (i) a first layer comprising a woven polymer and (ii) a second layer laminated to the first layer, said second layer comprising a polymer film;
- and
- wherein at least one of said top end or bottom end of the bag comprises a step cut configuration, and further wherein one or more of the separation of the back wall from the first side wall and the second side wall, and the front wall from the first side wall and the second side wall, and the separation the first and second front side walls from the first and second back side walls at the gusset fold lines is defined by a curved cut or a combination of a curved and angled cut, wherein the angled cut is between about 15° and about 75° with respect to the top end of the front wall.
3 more elements
A bag comprising:
- a front wall comprising a top end and a bottom end,
- a back wall comprising a top end and a bottom end, and
- a first side wall, and a second side wall disposed on opposite sides of the front and back walls and connecting the front wall to the back wall, forming a bag with a top end and a bottom end, each of the first side wall and the second side wall comprising a gusset with a central fold line extending from the bottom end to the top end of the respective side walls and dividing each of said first side wall and said second side wall into a front side wall and a back side wall;
- wherein each of the front wall, back wall, first side wall and second side wall comprise (i) a first layer comprising a woven polymer and (ii) a second layer laminated to the first layer, said second layer comprising a polymer film;
- and a third layer comprising a polymer and laminating said first layer to said second layer;
- and
- wherein at least one of said top end or bottom end of the bag comprises a step cut configuration, and further wherein one or more of the separation of the back wall from the first side wall and the second side wall, and the front wall from the first side wall and the second side wall, and the separation of at least one of the first and second front side walls from the first and second back side walls at the gusset fold lines are defined by a curved cut or a combination of curved and angled cut, wherein the angled cut is between about 15° and about 75° with respect to the top end of the front wall.
4 more elements
A bag comprising:
- a front wall comprising a top end and a bottom end,
- a back wall comprising a top end and a bottom end, and
- a first side wall, and a second side wall disposed on opposite sides of the front and back walls and connecting the front wall to the back wall, forming a bag with a top end and a bottom end, each of the first side wall and the second side wall comprising a gusset with a central fold line extending from the bottom end to the top end of the respective side walls and dividing each of said first side wall and said second side wall into a front side wall and a back side wall;
- wherein each of the front wall, back wall, first side wall and second side wall comprise (i) a first layer comprising a woven polymer selected from polypropylene, high density polyethylene, low density polyethylene, polyester, or any combination thereof and (ii) a second layer laminated to the first layer, said second layer comprising a polymer film comprising polypropylene, polyethylene, polyethylene terephthalate, polyamide, oriented polypropylene, biaxially-oriented polypropylene, oriented polyethylene, biaxially-oriented polyethylene, oriented polyethylene terephthalate, biaxially-oriented polyethylene terephthalate, oriented polyamide, biaxially-oriented polyamide, coated paper or any combination thereof;
- and a third layer comprising a polymer film selected from polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof, and wherein said third layer laminates said first layer to said second layer;
- and
- wherein at least one of said top end or bottom end of the bag comprises a step cut configuration, and further wherein one or more of the separation of the back wall from the first side wall and the second side wall, and the front wall from the first side wall and the second side wall, and the separation the first and second front side walls from the first and second back side walls at the gusset fold lines are defined by an angled cut, a curved cut or a combination of a curved and angled cut, wherein the angled cut is between about 15° and about 75° with respect to the top end of the front wall;
- and
- wherein the bag comprises an easy open or easy access feature.
6 more elements
Dependencies are inferred from the claim text.