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US 11,597,573 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.
Claims21
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 and back walls 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 type of polymer;
- 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 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 plurality of surface treatments comprising a first surface treatment and a second surface treatment;
- wherein the first surface treatment comprises 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, and the second surface treatment comprises an ionization treatment after the application of ink for each of 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 sealed closure is sealed using heated air or pressure to seal the portion of the first layer of the interior surface of the back wall and the portion of the second layer of the exterior surface of the front wall together without an adhesive;
- and
- wherein the sealed closure is adapted to be opened by peeling 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.
7 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 and back walls 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 back wall is folded over the first end of the bag 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;
- where in the interior surface portion comprises the first layer and the exterior surface portion comprises the second layer;
- wherein the sealed closure comprises a treated portion of the first layer of the interior surface portion, a treated portion of the second layer of the exterior surface portion, or both;
- wherein the treated portion comprises a portion of the back wall interior surface portion, a portion of the front wall exterior surface portion or both, that have been treated with an application of an ink and an ionization treatment, wherein the ionization treatment occurs after the ink treatment;
- wherein the first end of the bag is sealed without an adhesive using at least one of heated air or pressure;
- and
- wherein the sealed closure is adapted to be opened by peeling 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 and back walls 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 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 the sealed closure comprises a treated portion of the first layer of the interior surface portion of the back wall, a treated portion of the second layer of the exterior surface portion of the front wall, or both;
- wherein the treated portion comprises a portion of the back wall interior surface portion, a portion of the front wall exterior surface portion or both, that have been treated with an application of an ink and an ionization treatment, wherein the ionization treatment occurs after the ink treatment;
- wherein the first end of the bag is sealed without an adhesive using at least one of heated air or pressure;
- and
- wherein the sealed closure is adapted to be opened by peeling 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.