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US 12,234,076 B2Granted
Peelable easy open plastic bags
AssigneePolytex Fibers Corporation
InventorsJacobo Bazbaz, Alberto Zaroli
Life of this patent
Estimating the term…
Abstract
A woven laminated plastic bag having features that 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 sealed closure that at least a portion of which can be easily peeled open with less force than the remainder of the sealed closure.
Claims30
A bag comprising:
- a front wall, a back wall, a first side wall, and a second side wall, wherein the first and second side walls are disposed on opposite sides of the front wall and the back wall and connecting the front wall to the back wall, forming a bag with a first end and a second end;
- wherein each of the front wall, back wall, first side wall and second side wall have a first end and a second end, and comprise two layers further comprising (a) a first layer comprising a woven polymer, and (b) a second layer comprising a polymer film;
- wherein the woven polymer and the polymer film comprise the same polymer;
- wherein a portion of the first end of the back wall is folded over the first end of the bag front wall and a portion of the back wall is sealed to a portion of the front wall to form a sealed closure of the first end of the bag;
- wherein at least a first portion of the portion of the back wall or a first portion of the portion of the front wall, or both, have been treated with a first surface treatment;
- wherein the first surface treatment comprises a selectively controlled application of a first ink to the first portion of the portion of the back wall, the first portion of the portion of the front wall, or both;
- wherein the first ink comprises a polyamide ink, a urethane-based ink, nitrocellulose ink, or a combination of the foregoing;
- and
- wherein the treated portion has been treated with a second surface treatment comprising an application of a second ink other than the ink applied in the first surface treatment.
6 more elements
A bag comprising:
- a front wall, a back wall, a first side wall, and a second side wall, wherein the first and second side walls are disposed on opposite sides of the front wall and the back wall and connecting the front wall to the back wall, forming a bag with a first end and a second end;
- wherein each of the front wall, back wall, first side wall and second side wall have a first end and a second end, and each comprises two layers further comprising (a) a first layer comprising woven polyethylene strips, and (b) a second layer comprising a polyethylene film;
- wherein a portion of the first end of the back wall is folded over the first end of the bag front wall and an interior surface portion of the back wall is sealed to an exterior surface portion of the front wall to form a sealed closure of the first end of the bag;
- wherein the interior surface portion of the back wall comprises the first layer and the exterior surface portion of the front wall comprises the second layer;
- wherein at least a portion of the first layer of the interior surface portion of the back wall or a portion of the second layer of the exterior surface portion of the front wall, or both, have been treated with a first surface treatment;
- wherein the first surface treatment comprises a selectively controlled application of an ink to the portion of the first layer of the interior surface portion of the back wall, the portion of the second layer of the exterior surface portion of the front wall, or both;
- wherein the ink comprises a polyamide ink, a urethane-based ink, nitrocellulose ink, or a combination of the foregoing;
- and
- wherein the sealed closure is adapted to be opened by hand and to exhibit less than a 3% failure rate when the bag is subjected to a drop test in accordance with an ASTM D5276 standard.
6 more elements
A bag comprising:
- a front wall, a back wall, a first side wall, and a second side wall wherein the first and second side walls are disposed on opposite sides of the front wall and the back wall and connecting the front wall to the back wall, forming a bag with a first end and a second end;
- wherein each of the front wall, back wall, first side wall and second side wall have a first end and a second end, and comprise two layers further comprising (a) a first layer comprising woven strips comprising polypropylene, and (b) a second layer comprising a film comprising polypropylene;
- wherein a portion of the first end of the back wall is folded over the first end of the bag front wall and an interior surface portion of the back wall is sealed to an exterior surface portion of the front wall to form a sealed closure of the first end of the bag;
- wherein the interior surface portion of the back wall comprises the first layer and the exterior surface portion of the front wall comprises the second layer;
- wherein at least a portion of the first layer of the interior surface portion of the back wall or a portion of the second layer of the exterior surface portion of the front wall, or both, have been treated with a first surface treatment;
- wherein the first surface treatment comprises selectively controlling an application of an ink to the portion of the first layer of the interior surface portion of the back wall, the portion of the second layer of the exterior surface portion of the front wall, or both;
- wherein the ink comprises a polyamide ink, a urethane-based ink, nitrocellulose walls, or a combination of the foregoing;
- and
- wherein the sealed closure is adapted to be opened by hand and to exhibit less than a 3% failure rate when the bag is subjected to a drop test in accordance with an ASTM D5276 standard.
6 more elements
Dependencies are inferred from the claim text.