WO2017218571A1 - Sacs plastiques tissés pourvus de caractéristiques réduisant la fuite, la rupture et l'infestation - Google Patents

Sacs plastiques tissés pourvus de caractéristiques réduisant la fuite, la rupture et l'infestation Download PDF

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Publication number
WO2017218571A1
WO2017218571A1 PCT/US2017/037306 US2017037306W WO2017218571A1 WO 2017218571 A1 WO2017218571 A1 WO 2017218571A1 US 2017037306 W US2017037306 W US 2017037306W WO 2017218571 A1 WO2017218571 A1 WO 2017218571A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
sealing tape
wall
edge
side wall
Prior art date
Application number
PCT/US2017/037306
Other languages
English (en)
Inventor
Jacobo Bazbaz
Alberto ZAROLI
Original Assignee
Polytex Fibers Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US15/440,970 external-priority patent/US10759585B2/en
Application filed by Polytex Fibers Corporation filed Critical Polytex Fibers Corporation
Priority to EP17813957.2A priority Critical patent/EP3472066B1/fr
Priority to EP24179235.7A priority patent/EP4410703A2/fr
Priority to MX2018015633A priority patent/MX2018015633A/es
Priority to CA3025176A priority patent/CA3025176A1/fr
Publication of WO2017218571A1 publication Critical patent/WO2017218571A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
    • B65D63/10—Non-metallic straps, tapes, or bands; Filamentary elements, e.g. strings, threads or wires; Joints between ends thereof
    • B65D63/1009—Adhesive tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5894—Preformed openings provided in a wall portion and covered by a separate removable flexible element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements

Definitions

  • Laminated woven sacks were developed using a woven polypropylene structure laminated to a bi-oriented polypropylene film (BOPP) that can be reverse printed with high end graphics suitable for consumer type of packaging.
  • BOPP bi-oriented polypropylene film
  • the LWS provides a stronger, more attractive bag than the more conventional multiwall bags used for that purpose over the last 20 years. Due to their tough strong structure, conventional LWS bags are typically sewn shut on both ends.
  • pinch laminated woven sacks that overcome these drawbacks in the filling and closing operations while allowing an attractive graphic display of the bags' ends at the retail outlet and also providing a strong, durable bag which remains sealed.
  • a further disadvantage of the newly developed pinch bottom laminated woven sack is that it does not include an easy open feature that allows the consumer or purchaser to quickly and easily open the bag without the use of scissors or knives.
  • There is a need for such a pinch bottom laminated woven sack which is easy to open without the use of scissors, knives or other such instruments, and also does not require the use of excessive force.
  • the '979 patent describes the use of ultrasonic spot welds to seal portions of a bag made of such woven plastic strips, as opposed to sewing the seams of a bag or using a hot melt adhesive to seal the gusset forming pleat.
  • the '979 patent is hereby incorporated by reference herein.
  • the '979 patent purports to be an improvement for sealing a plastic bag. As noted in the '979 patent, sewing one end tends to take longer, thus adding time to the manufacturing process. In addition, the sewn ends in a conventional bag tend to be a weak portion of the bag, and a likely location for rips, tearing, and subsequent loss of contents during storing, shipping and handling. In addition, such bags may not provide sufficient protection from infestation from vermin and/or insects.
  • Newly developed pinch laminated woven sacks overcome these drawbacks in the filling and closing operations while allowing an attractive graphic display of the bags' ends at the retail outlet and also providing a strong, durable bag which remains sealed.
  • such bags still remain susceptible to leakage, breakage and infestation at both ends of the seam and in the area along the top and bottom of the gussets.
  • the bag needs to be strong enough to avoid leakage, breakage or infestation, which can begin with a small opening or crack that then gets larger over time, such as with additional forces or movement of the bag.
  • woven and non- woven bags are sealed with a single or double fold at each end with tape over the single or double fold, stitching at both ends, or a zipper at one end and a single or double fold at the other end.
  • opening woven and certain non-woven bags has proven difficult, due to the strength of the bag. Therefore, what is needed are woven and non- woven bags that are easier to open, that do not add much to the cost or time to manufacture, and are not susceptible to inadvertent tearing, punctures, breaking, or the like.
  • the present disclosure provides woven plastic bags comprising one or more features that prevent leakage and/or infestation at both ends of the bag when closed, and also in the area of a seam and in the area along the top and bottom of the gussets, when present.
  • the disclosure further provides an improved easy open feature to be used on woven bags, particularly bags of woven flat polymer strips that cannot be torn by hand.
  • the disclosure further provides a tape sealant that provides security for the ingredients of a heavy, woven bag designed to hold from 10 pounds up to 50 pounds, or up to 100 pounds, or up to 150 pounds or more of ingredients during transport, storage and marketing, and yet can be easily opened by hand by a typical retail consumer.
  • the disclosure can be described, therefore, in certain embodiments as a bag including 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 connect the front wall to the back wall.
  • the bag can be formed as a tubular bag (formed from a flat bag sheet) cut to produce a top end and a bottom end, or as a typical 6 sided bag in which each of the walls of the bag are composed of laminated layers including a first layer composed of a woven polymer and providing an interior surface of the bag and a second layer composed of a polymer film providing an exterior surface of the bag.
  • the bag includes one or more additional layers, including a third layer composed at least in part of a polymer laminated between a first and second layer.
  • the disclosed bags also can include, in certain embodiments, an easy open feature including an elongated weakened area spanning a portion of the front wall or the back wall, or a combination thereof and/or a side wall, and a length of a sealing tape with a layer of adhesive on the bottom surface such that the sealing tape adheres to the exterior bag surface and completely covers and seals the weakened area.
  • an easy open feature including an elongated weakened area spanning a portion of the front wall or the back wall, or a combination thereof and/or a side wall, and a length of a sealing tape with a layer of adhesive on the bottom surface such that the sealing tape adheres to the exterior bag surface and completely covers and seals the weakened area.
  • a sealing tape is generally available on a roll or sheet from which it can be peeled and adhered to a desired surface. The tape is thus a long and relatively thinner product with a first end and a second end disposed oppositely of the first end and a first edge and a second edge disposed oppositely of
  • the sealing tape further comprises a bottom surface comprising an adhesive and adapted to adhere to a surface and a top surface opposite of the bottom surface.
  • the sealing tape additionally can include a center section extending generally in parallel to the first and second edges of the sealing tape over substantially the entire length of the sealing tape from the first end to the second end, and adapted such that when the sealing tape is adhered to a surface such as the surface of a bag, at least a portion of the center section can be removed from the surface while the two sections on either side of the center section of the sealing tape remain adhered to the surface.
  • the center section can be defined by polymer strings or waxed fiber strings attached to the bottom surface of the tape and extending at least of portion of the length of the tape or in certain embodiments, substantially the entire length of the tape.
  • the strings are adapted such that when the center section, which is disposed between the strings is pulled up toward the top surface of the tape, the strings cut through the tape such that the center section is removed and the sections on either side of the center section remain adhered to a surface.
  • an additional and separate strip of tape termed the "center strip” herein can provide the center section of the sealing tape and can comprise a first end and a second end that are substantially continuous with the first and second ends of the sealing tape and a first edge and a second edge that overlap with the inner edges of the sections of the sealing tape on either side of the center section.
  • the center strip can be adhered to the bottom surface or to the top surface of the inner edges of the sealing tape sections on either side of the center strip, or a combination thereof such that the center strip of tape forms the center section of the sealing tape and can be removed from a surface without removing the entire sealing tape.
  • the long edges of the center strip of tape can overlap with the top or bottom surface of the sections of the sealing tape on either side of the center strip of tape, or in certain embodiments the sealing tape is composed of 3 portions, with a first strip of sealing tape on a first side of the center strip, a second strip of the sealing tape on a second side of the center strip and a center strip disposed between the first and second strips of the sealing tape.
  • the inside edges of the first and second strips abut and optionally overlap the outer edges of the center strip such that the three portions seal as a single tape when adhered to a surface such as the surface of a bag.
  • the disclosed bags can have an easy open feature and that an easy open feature can comprise a weakened area including cuts or perforations in a pattern that provides access to any contents of the bag when the bag surface is torn or opened along the weakened area.
  • an easy open feature can comprise a weakened area including cuts or perforations in a pattern that provides access to any contents of the bag when the bag surface is torn or opened along the weakened area.
  • the center section of the sealing tape when a sealing tape as disclosed herein is adhered to a surface of a bag, the center section of the sealing tape is disposed such that the center section covers at least a portion of the weakened area, and in certain embodiments the center section covers at least a portion of the weakened area and the remainder of the sealing tape does not cover any portion of the weakened area.
  • the center portion covers the entire weakened area.
  • a sealing tape is placed on the surface of a bag so that a linear weakened area is substantially centered in the width of the sealing tape and the center section of the sealing tape can extend to be on both sides of the weakened area, so that pulling up on one end of the center section of the sealing tape is effective to remove the center section and expose at least a portion of the weakened area without removing the entire width of the sealing tape, or while leaving the sections of the sealing tape on either side of the center section still adhered to the surface.
  • sealing tape with a separately removable center section either comprising edging strings, or a center strip of tape allows a user to open the bag by pulling up only a portion of the sealing tape, which requires substantially less force, or hand strength than would be required to pull up the entire width of the sealing tape.
  • the disclosed bags can be configured with a step cut pattern on one or both ends of the bag.
  • a step cut bag is known in the art to provide a better seal when the step cut end is folded over and affixed to the surface of a bag with an adhesive or other means such as heat, for example.
  • the line of the upper or lower edge of the stepped portion of the bag steps up or down.
  • a fold line typically runs perpendicular to the top and bottom end of the front and back walls and is positioned in the center line of the side walls.
  • the side walls can include another step down or up to the gusset fold line.
  • a bag blank, or flat sheet is provided and formed into a tube by folding the blank so that the two side edges overlap on the front or back wall of the bag and are bonded to form a seam.
  • a continuous sheet of material is cut to separate the individual bags from the continuous sheet by a single cut that forms the bottom end of one bag and the top end of the subsequent bag, (or the reverse) simultaneously so that one end steps up and the other end steps down.
  • the disclosure can be further defined, therefore, in some embodiments as a step cut bag in which the junctions at the top and/or bottom end of the back wall and the first side wall and the second side wall, and the junctions of the front wall with the first side wall and the second side wall, are curved or angled cuts other than a 90° or square angle, or a combination of curved and angled cuts.
  • the end cut of the bag will include a step cut, as a curve or acute angle, or a combination of curves and acute angles between the side wall ends and the gusset fold lines.
  • junctions of the back wall and the front wall with the first and second side walls, and at the gusset fold lines at least in part are cut at angles between about 15° and about 75°, or angles between about 30° and about 60° or angles of about 45° with respect to the top end of the front wall, or are cut at least in part in radial, elliptical, parabolic, or hyperbolic curves, or combinations of curves and angles other than right angles.
  • “combination” in this context can mean that some junctions are curves and others are angled, or that some single steps can incorporate both a curve and an angle.
  • the easy open feature is covered and sealed with a tape that is tightly or strongly adhered to a surface of the bag to prevent leakage or infestation into the product within the bag.
  • the adhesion must be much stronger than in smaller bags that are not subject to the stresses of a bag holding 20-150 pounds of product, for example.
  • the seal of the easy open feature must also be stronger than in a single layer bag, or a smaller bag because of the difficulty of making an easy open feature in a woven polymer material that provides a sufficient seal.
  • the easy open feature can be configured in various ways and can include a weakened area, a zipper, a bar and groove, or other methods or configurations known in the art.
  • the easy open feature is a series or line of perforations or a line of cuts, or a combination thereof, through some or all of the bag layers on the front or back wall of a bag, or a weakened area that extends from the front wall, across a side wall and across the back wall.
  • the weakened area can also include a curved or arcuate feature somewhere along the line of the weakened area, with such a feature to serve as a thumb tab for use in opening the bag.
  • a thumb tab feature can be near either end of the weakened area or nearer to the center, or at the center of the weakened area.
  • the easy open feature is a weakened area formed by a line of perforations or cuts spaced apart from the bottom or top edge of the bag when the bag ends are sealed, at a distance of from about 10% to about 30%, or from 5% to 40% of the distance from the top edge to the bottom edge of the bag, or at a distance of from about 10% to about 30%, or from about 5% to about 40% of the distance from the bottom edge to the top edge of the front or rear wall of a bag, and extending horizontally over about 60% to about 99%, or from about 1% to about 99% of the width of the front wall, the back wall of a bag or both the front wall and back wall.
  • the width of the weakened area is generally not a critical measurement and that the width can vary considerably depending on the intended contents, or intended use of the bag and so any length of line or perforations can fall within the spirit of the present disclosure so long as the weakened area can be efficiently sealed with a tape as disclosed herein and provide a sufficient opening to conveniently remove the contents of the bag, when opened.
  • the sealing tape both provides an effective seal for the bag and also can be removed at least in part by a typical consumer, without the use of tools such as a knife or scissors.
  • the sealing tape includes a center section as discussed above adapted such that when one pulls up on the center section of the sealing tape, the sealing tape separates into a section that is removed and two sections, one on either side of the center section, that remain adhered to the bag surface.
  • the center section is about 5%, 10%, 12.5%, 15%, 25% or about 40%, or about 5% to about 50% of the total width of the sealing tape. Again the exact width of the center section can vary depending on the intended use of the bag.
  • the center section is of a sufficient width to cover at least a portion of the width of the easy open feature and is narrow enough that the force required to pull up the center section of the sealing tape is significantly less than the force required to remove the entire width of the sealing tape.
  • the sealing tape can have a width of from about 1 to about 5 inches, or from about 1.5 to about 3 inches for example. Again, the width of the sealing tape is not an exact requirement but can vary depending on the intended use of a bag and the weight of contents of the bag during use.
  • one end, or both ends of the sealing tape forms a tab region, such as to provide a pull tab.
  • the tab can be formed by folding over an end of the sealing tape and creating an area of double thickness with the two adhesive faces of the bottom of the tab region adhering to each other. In this way, no adhesive is in contact with the bag in the tab region.
  • the tab can be further formed by cutting a portion of the sealing tape between and along the edges of the center section and folding the cut portion on itself to create a tab that does not adhere to the surface of a bag in the tab region. This facilitates opening the sealing tape (and thus the bag) because the cuts have already been started without compromising the seal of the bag. It will be understood that other types of tabs, including adding a pull feature to the end of the sealing tape to create a tab can also be employed. In alternative embodiments the tab portion of the sealing tape can be manufactured without adhesive on the bottom surface. As used herein, the bottom surface of the tape is intended to convey its normal meaning in the art, which would be the exterior surface of the tape that adheres to another surface, such as the surface of the bag, and the top would be the exposed side of the tape that does not adhere.
  • the disclosed bags are described herein as heavy duty bags or bags designed to hold 10 pounds or more, or 10-150 pounds of dry product, and can also be described as bags that can withstand the standard drop test requirements in accordance with ASTM D5276-98 (ASTM D5276-98 (2009), Standard Test Method for Drop Test of Loaded Containers by Free Fall, ASTM International, West Conshohocken, PA, 2009) within an acceptable failure rate, for example, less than 5% or less than 3% or less than 1% failure rate when subjected to a drop test including hanging a filled bag at 145°F for 72 hours followed by a six point drop test from a height of at least four feet, followed by storage at -27°F for 24 hours followed by another six point drop test from a height of at least four feet and repeating this test sequentially for five drop test cycles.
  • the described bags can also be defined in certain embodiments as having an acceptable failure rate as defined above when subjected to a drop test in accordance with the ASTM D5276-98 drop test standard, including hanging a filled bag at 145°F for 144 hours followed by a ten point drop test from a height of at least four feet followed by storage at -27°F for 72 hours followed by another ten point drop test from at height of at least four feet, and repeating the cycle five times. It is further understood that the sealing tape covering the easy open feature also has to endure these tests and fall within the acceptable failure rate. It is further understood that a six point drop test includes dropping the bag onto the front, back, top, bottom, and the two sides, while a ten point drop test includes the six point test and additionally dropping the bag on the four corners of the bag.
  • the sealing tape exhibits a peel resistance that is measurable according to a 180 Degree Peel Test per the (ASTM D3330/3330M-04(2010) Test Method for Peel Adhesion of Pressure Sensitive Tape) standard and that the center section of the sealing tape has a peel resistance of no more than 50%, or no more than 40% or no more than 30%, or no more than 20% of the peel resistance of the entire sealing tape, or in other words, the force required to open the bag with the center section no more than 50%, or 60%, or 70%, or 80% of the force required to open the entire sealing tape.
  • the sealing tape as described herein provides the peel resistance of the full width of the sealing tape during transport and storage to prevent leakage and then provides a significantly reduced peel resistance when the bag is opened by peeling off a smaller portion of the sealing tape.
  • the present inventors have demonstrated, for example, that with a sealing tape of 3 inches in width and a center section with a width of 3/8", an average force of from 8-10 pounds at a 180° angle was required to peel the entire tape from the bag, while an average force of only about 3 to 4 pounds was required to peel the center section of the tape.
  • a reduction in the force required to open a woven bag was reduced by more than 50%, and in certain cases up to 70%, making the bags significantly easier for a consumer to open by hand and without losing any sealing integrity of the bag.
  • the front wall or the back wall of a bag comprises a seam extending from the top edge to the bottom edge of the front or back wall, wherein a portion of the front or back wall adjoining the seam comprises a tab adjacent to or extending vertically into the seam and a corresponding cut-out in the opposite end of the wall adjacent to or extending into the seam.
  • the tab and cutout can be vertical with respect to the top and bottom ends of the bag and small relative to the size of the front or back wall of the bag, and can in certain embodiments be from about 3/8 inch to about 5/8 inch in width with a depth of about 1/8 inch to about 1/2 inch and can be disposed at the edge of the end of a portion of the bag that overlaps two edges of layered material to create the seam.
  • the laminated bags of the disclosure can be composed of two or more layers including a woven polymer layer.
  • the woven polymer layer includes woven strips of polypropylene, high density polyethylene, low density polyethylene, polyester, or combinations of any thereof.
  • the polymer strips are understood to be flat, planar strips woven into a sheet by crossed strips referred to as warps and wefts, or woofs. In certain embodiments the strips are about 1/8 to 1/4 inch wide flat strips.
  • a second laminated layer can include polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof, or it can include 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 can include a printed area thereon.
  • the bags can include a third layer that can include polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof, or it can include oriented polypropylene, biaxially-oriented polypropylene, oriented polyethylene, biaxially-oriented polyethylene, oriented polyethylene terephthalate, biaxially-oriented polyethylene terephthalate, oriented polyamide, biaxially-oriented polyamide, or any combination thereof, wherein the third layer laminates the first layer to the second layer.
  • the three layers can comprise polypropylene and in certain embodiments the three layer can comprise polyethylene.
  • the disclosure can also be described in certain embodiments as a sealing tape for an easy open feature of a bag comprising a woven polymer layer, wherein the sealing tape comprises at least one center section as described herein and wherein the center section is about 5%, 10%, 12.5%, 15%, 20%, 25%, or from 5% to 40% of the total width of the sealing tape.
  • the sealing tape can include those in which the width of the center section is about 5% to about 50%, or about 10% to about 40% or about 30%, 12.5% or 10% of the total width of the sealing tape.
  • the sealing tape is from 1.5 to 5 inches in width, or from 1 to 3 inches in width, for example.
  • the sealing tape can further include a tab portion disposed at one or both ends wherein the tab portion does not adhere to a surface of bag.
  • the entire end of the tab is free of adhesive.
  • the tab region includes small parallel cuts from the outer end of the tab to the area of the sealing tape that adheres to the bag, wherein the cuts substantially conform to the edges of the center section.
  • the sealing tape has a first peel resistance from the bag surface and the center section of the sealing tape has a significantly lower peel resistance.
  • Peel resistance can be defined as the force required to be exerted at a certain angle (90° or 180°, for example) and at a certain rate in order to peel the sealing tape from a surface.
  • the peel resistance is directed to the force required to remove the sealing tape from the bag or an analogous surface.
  • the peel resistance of the center section of the sealing tape is no more than 50%, or no more than 40%, or no more than 30%, or no more than 20% of the peel resistance of the entire width of sealing tape. It is further understood that the entire width of the sealing tape in this context would be meant to convey an identical sealing tape without a separate or separatable center section so that the sealing tape peels as a single strip.
  • the present disclosure can also be described in certain embodiments as a laminated woven polymer bag including a first layer of polymer comprising woven flat polymer strips of about 1/8 to 1/4 inch in width and a second layer of a polymer film; a front wall, a back wall a left side wall and a right side wall; and an easy open feature on at least one of the front or the back wall thereof, or across a side wall and one or both of the front wall and back wall, wherein the easy open feature comprises an elongated weakened area spanning a portion of the front wall, side wall, and/or the back wall wherein the weakened area is sealed with a sealing tape comprising a length and a width and adhered to the front or back wall of the bag by an adhesive on the bottom of the sealing tape.
  • the sealing tape includes two strings adhered to the bottom of the sealing tape, the strings spaced apart such that the weakened area is disposed under the sealing tape and between the two strings, such that pulling up on one end of the sealing tape at a position between the two strings is effective to cut the sealing tape along the lines of the two strings to expose the weakened area without removing an area of the sealing tape outside the two strings.
  • the sealing tape includes a center section strip of tape adhered to the top or bottom of the sealing tape and covering the weakened area; and a weakened area created by a line of perforations or cuts, in which the weakened area comprises a line of perforations or cuts substantially parallel to the top or bottom edge of the front or back wall and spaced apart from the bottom or top edge of the bag when the bag ends are sealed, at a distance of from about 10% to about 30% of the distance from the top edge to the bottom edge, or at a distance of from about 10% to about 30% of the distance from the bottom edge to the top edge of the front or rear wall of the bag, and extending horizontally over about 60% to about 99% of the width of the front wall or the back wall.
  • the two strings can be spaced apart with about 25% to about 40% of the total width of the sealing tape between the two strings, or the width of the center section tape can be about 25% to about 40% of the width of the sealing tape.
  • the sealing tape can be about 1.5 to 3 inches in width.
  • At least one end of the tape in the portion of the tape between the two strings can form or include a pull tab, in which the tab is not adhered to the front or back wall of the bag.
  • the adhesive when the sealing tape is sealed to the bag has less than a 3% failure rate when subjected to a drop test in accordance with the drop test standard ASTM D5276 (ASTM D5276- 98(2009) Standard Test Method for Drop Test of Loaded Containers by Free Fall) including hanging the filled bag at 145°F for 72 hours followed by a six point drop test from a height of at least four feet, followed by storage at -27°F for 24 hours followed by another six point drop test from a height of at least four feet.
  • ASTM D5276 ASTM D5276
  • the adhesive has less than a 3% failure rate when the bag is subjected to a drop test in accordance with ASTM D5276 including hanging the filled bag at 145°F for 144 hours followed by a ten point drop test from a height of at least four feet followed by storage at -27°F for 72 hours followed by another ten point drop test from at height of at least four feet.
  • Such bags can include a first layer comprising woven flat strips of polypropylene, high density polyethylene, low density polyethylene, polyester, or any combination thereof, a second film layer including polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof, and/or another film layer including oriented polypropylene, biaxially-oriented polypropylene, oriented polyethylene, biaxially-oriented polyethylene, oriented polyethylene terephthalate, biaxially-oriented polyethylene terephthalate, oriented polyamide, biaxially-oriented polyamide, or any combination thereof.
  • the present disclosure can also be described in certain embodiments as bags that have certain sections that are separated by a non-right angled portion or edge, a curved portion or edge, or a combination thereof, and/or bags that comprise a cut-out and corresponding tab at opposing ends of the bag proximal to the portions of the back or front wall that form the seam.
  • the bag comprising a front wall, a back wall having a first portion and a second portion, a first side wall having a first portion proximal to the first portion of the back wall and a second portion proximal to the front wall, a second side wall having a first portion proximal to the second portion of the back wall and a second portion proximal to the front wall, an interior surface, an exterior surface, a top end, a bottom end, a first layer and a second layer, each of the front wall, back wall, first side wall and second side wall having an interior surface, an exterior surface, a top end and a bottom end, wherein the first layer comprises a woven polymer and the second layer comprises a polymer or paper attached to the first layer, wherein the back wall projects further than the top end of the first portion of the first side wall and the top end of the first portion of the second side wall, the top end of the first portion of the first side wall and the top end of the first portion of the second side wall projects further than the
  • the angled edge or portion is between about 15° and about 75°, or between about 30° and about 60°, with respect to the top end of the front wall. In other embodiments the angled edge or portion is about 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, or 80° with respect to the top end of the front wall. In further embodiments the curved edge or portion is a radial edge or portion, an elliptical edge or portion, a parabolic edge or portion, or a hyperbolic edge or portion. In additional embodiments the bag comprises an easy open or easy access feature, which in certain embodiments can comprise a weakened area.
  • the present disclosure additionally provides a bag comprising a front wall, a back wall, a first side wall, a second side wall, an interior surface, an exterior surface, a top end, a bottom end, a first layer and a second layer, each of the front wall, back wall, first side wall and second side wall having an interior surface, an exterior surface, a top end and a bottom end, wherein the first layer comprises a woven polymer and the second layer comprises a polymer or paper attached to the first layer, and wherein the bag comprises a weakened area located on the front wall of the bag, the first side wall of the bag and the back wall of the bag proximal the top end of the bag.
  • the first layer comprises polypropylene, high density polyethylene, low density polyethylene, polyester, or any combination thereof.
  • the second layer comprises a film.
  • the second layer comprises polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof or paper.
  • the second layer comprises oriented polypropylene, biaxially-oriented polypropylene, oriented polyethylene, biaxially-oriented polyethylene, oriented polyethylene terephthalate, biaxially-oriented polyethylene terephthalate, oriented polyamide, biaxially-oriented polyamide, or any combination thereof.
  • at least a portion of the second layer comprises a printed area thereon.
  • first layer and second layer are laminated together.
  • first layer and second layer are laminated together using adhesive lamination or extrusion lamination, or by another film layer which may comprise polypropylene, polyethylene, oriented polypropylene or polyethylene, or combinations thereof.
  • first, second and third layers comprise polypropylene or the first, second and third layers comprise polyethylene.
  • the weakened area comprises a plurality of perforations that penetrate wholly or partially through at least a portion of the front wall of the bag, the first side wall of the bag and/or the back wall of the bag. In some embodiments the plurality of perforations forms a line.
  • the plurality of perforations forms a line that extends from any position on the front wall of the bag, for example about 5%, about 10%, about 15%, about 20%, about 25%, about 30%, about 35%, about 40%, about 45%, about 50%, about 55%, about 60%, about 65%, about 70%, about 75%, about 80%, about 85%, about 90%, about 95%, about 97%, about 98% or about 99% of a distance across the front wall of the bag, across the first side wall of the bag, to any position on the back wall of the bag, for example about 5%, about 10%, about 15%, about 20%, about 25%, about 30%, about 35%, about 40%, about 45%, about 50%, about 55%, about 60%, about 65%, about 70%, about 75%, about 80%, about 85%, about 90%, about 95%, about 97%, about 98% or about 99% of a distance across the back wall of the bag.
  • the plurality of perforations forms a wave pattern. In further embodiments the plurality of perforations forms a zigzag pattern.
  • the weakened area comprises a deformation in least a portion of the front wall of the bag, the first side wall of the bag and the back wall of the bag. In yet further embodiments the weakened area further comprises a scoring mark. In certain embodiments each of the first layer and the second layer of the bag comprise a weakened portion. In still other embodiments the back wall of the bag comprises a seam.
  • the top end of the back wall projects further than the top end of a portion of the first side wall proximal to the back wall and the top end of a portion of the second side wall proximal to the back wall
  • the top end of a portion of the first side wall proximal to the back wall and the top end of a portion of the second side wall proximal to the back wall projects further than the top end of a portion of the first side wall proximal to the front wall and the top end of a portion of the second side wall proximal to the front wall
  • the top end of a portion of the first side wall proximal to the front wall and the top end of a portion of the second side wall proximal to the front wall projects further than the top end of the front wall.
  • At least a portion of the bottom end of the front wall projects further than the bottom end of a portion of the first side wall proximal to the front wall and the bottom end of a portion of the second side wall proximal to the front wall, the bottom end of a portion of the first side wall proximal to the front wall and the bottom end of a portion of the second side wall proximal to the front wall project further than the bottom end of a portion of the first side wall proximal to the back wall and the bottom end of a portion of the second side wall proximal to the back wall, and the bottom end of a portion of the first side wall proximal to the back wall and the bottom end of a portion of the second side wall proximal to the back wall project further than the bottom end of the rear wall.
  • top end of a portion of the first side wall proximal to the back wall and the top end of a portion of the first side wall proximal to the front wall are separated by an angled cut
  • bottom end of a portion of the first side wall proximal to the back wall and the bottom end of a portion of the first side wall proximal to the front wall are separated by an angled cut
  • the portion of the bottom end of the front wall that projects further than the bottom end of the first side wall and the bottom end of the second side wall, and the portion of the bottom end of the first side wall and the bottom end of the second side wall that project further than the bottom end of the rear wall are sealed to the outer surface of the bottom end of the rear wall.
  • the bottom end of the bag is sealed using an adhesive sealing, heat sealing, adhesive lamination, extrusion lamination, stitching, ultrasonic energy, pressure, tape, or any combination thereof.
  • the bottom end of the bag is sealed using adhesive-to-adhesive sealing or adhesive-to-bag sealing.
  • the bottom end of the front wall, the bottom end of the first side wall, the bottom end of the rear wall and the bottom end of the second side wall each project the same distance.
  • at least a portion of a single fold of the bottom end of the bag is sealed to the outer surface of the front wall or the outer surface of the rear wall of the bag.
  • at least a portion of a double fold of the bottom end of the bag is sealed to the outer surface of the front wall or the outer surface of the rear wall of the bag.
  • the top end of the front wall, the top end of the first side wall, the top end of the rear wall and the top end of the second side wall each project the same distance.
  • at least a portion of the bottom end of the front wall projects further than the bottom end of a portion of the first side wall proximal to the front wall and the bottom end of a portion of the second side wall proximal to the front wall
  • the bottom end of a portion of the first side wall proximal to the front wall and the bottom end of a portion of the second side wall proximal to the front wall project further than the bottom end of a portion of the first side wall proximal to the back wall and the bottom end of a portion of the second side wall proximal to the back wall
  • the bottom end of a portion of the first side wall proximal to the back wall and the bottom end of a portion of the second side wall proximal to the back wall project further than the bottom end of the rear wall.
  • the portion of the bottom end of the front wall that projects further than the bottom end of the first side wall and the bottom end of the second side wall, and the portion of the bottom end of the first side wall and the bottom end of the second side wall that project further than the bottom end of the rear wall are sealed to the outer surface of the bottom end of the rear wall.
  • the bottom end of the front wall, the bottom end of the first side wall, the bottom end of the rear wall and the bottom end of the second side wall each project the same distance.
  • the top end and the bottom end of the bag are sealed, and wherein the bag comprises at least ten pounds by weight of a filling material.
  • the bag further comprises a third layer comprising a polymer between the first layer and the second layer.
  • the third layer comprises a woven polymer.
  • the third layer comprises a film.
  • the third layer may comprise polypropylene, high density polyethylene, low density polyethylene, polyester, or any combination thereof.
  • the third layer comprises a polymeric film.
  • the third layer comprises polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof.
  • each of the first layer, the second layer and the third layer of the bag comprise a weakened portion.
  • the bag comprises printing on the front wall, the first side wall, the back wall, the second side wall, the first end, the second end, or any combination thereof.
  • at least portions of the surfaces of each of the front wall and the back wall comprise a plurality of discrete areas further comprising printing thereon.
  • a portion of the front wall and a portion of the back wall combine to form a discrete portion of the bag located at or near either the top end or the bottom end, wherein the discrete portion of the bag comprises printing.
  • the printing may be on the exterior surface of the bag or may be on the inside surface of an otherwise transparent film layer, which can have reverse printing thereon.
  • FIG. 1 shows an outline of a step cut bag with a weakened area near the top end of the bag comprising a line of perforations extending from the front panel of the bag across the first side panel of the bag to the back panel of the bag according to one embodiment of the present disclosure.
  • FIG. 2 shows the top portion of the bag of FIG. 1 after closing the top end of the bag.
  • FIG. 3 shows the first step in opening the closed bag from FIG. 2.
  • FIG. 4 shows the second step in opening the closed bag from FIG. 2.
  • FIG. 5 shows the third step in opening the closed bag from FIG. 2.
  • FIG. 6 shows the fourth step in opening the closed bag from FIG. 2.
  • FIG. 7 shows the top portion of the bag of FIG. 1 after closing the top end of the bag and a location for optional application of adhesive to keep the top portion of the gusseted portion of the first side panel closed.
  • FIG. 8 shows an outline of a step cut bag with a weakened area near the top end of the bag comprising a line of perforations extending from the front panel of the bag across the first side panel of the bag to the back panel of the bag, and angled corners at the top and bottom of the portions of the first and second side panels on either side of the gusset fold, according to one embodiment of the present disclosure.
  • FIG. 9 shows an outline of a bag with a step cut top end and a flush cut bottom end, and a weakened area near the top end of the bag comprising a line of perforations extending from the front panel of the bag across the first side panel of the bag to the back panel of the bag according to one embodiment of the present disclosure.
  • FIG. 10 shows an outline of a bag with a flush cut top end and a flush cut bottom end, and a weakened area near the top end of the bag comprising a line of perforations extending from the front panel of the bag across the first side panel of the bag to the back panel of the bag according to one embodiment of the present disclosure.
  • FIG. 11 shows an outline of a bag with a step cut top end and a step cut bottom end, with an angled portion between the 2 sections of the side wall at both ends of the bag, and a tab at one end of the bag and a cut-out feature at the other end of the bag that extend into the seam.
  • FIG. 12 shows an outline of the top portion of a bag with a step cut top end, with radial (circular) portions between the back panel of the bag and the side wall, between the 2 sections of the side wall, and between the side wall and the front panel of the bag at the top end of the bag, and a cut-out feature at the top end of the bag that extends into the seam.
  • FIG. 13 A shows an outline of a portion of one end of a bag with a step cut end, corresponding to a mirror image of the region marked as "A" in FIG. 11, detailing an alternate embodiment with angled portions between the back panel of the bag and the side wall, between the 2 sections of the side wall, and between the side wall and the front panel of the bag, and a tab feature at one end of the bag that extends into the seam.
  • FIG. 13B shows an image of the top end of the bag depicted in FIG. 13A upon sealing the seam.
  • FIG. 13C shows an image of the bottom end of the bag depicted in FIG. 13 A upon sealing the seam.
  • FIG. 14A shows an outline of a portion of one end of a bag with a step cut end, corresponding to a mirror image of the region marked as "A" in FIG. 11, detailing an alternate embodiment with a combination of radial (circular) and angled portions between the back panel of the bag and the side wall, between the 2 sections of the side wall, and between the side wall and the front panel of the bag, and a tab feature at one end of the bag that extends into the seam.
  • FIG. 14B shows an image of the top end of the bag depicted in FIG. 14A upon sealing the seam.
  • FIG. 14C shows an image of the bottom end of the bag depicted in FIG. 14A upon sealing the seam.
  • FIG. 15A is a depiction of a bag with a sealing tape covering an easy open feature.
  • FIG. 15B is a depiction of the bag of claim 15A with the sealing tape over the easy open feature partially opened along the lines of the two strings.
  • FIG. 15C is a depiction of the bag of claim 15B with the easy open feature almost completely uncovered.
  • FIG. 16A-C are depictions of a bag with a sealing tape and a narrower strip of tape adhered to the top of the sealing tape in a closed (A) state, with the tab piece raised (B) and further opened (C).
  • FIG. 17A is a depiction of a bag of the disclosure with an easy open feature.
  • FIG. 17B is a depiction of a bag of the disclosure with an easy open feature includes a thumb tab.
  • FIG. 18 shows a flush cut bag with an easy open feature comprising a square cut through the bag located near the top end of the bag according to one embodiment of the present disclosure.
  • FIG. 19 shows a flush cut bag with an easy open feature comprising a carat cut through the bag located near the top end of the bag according to one embodiment of the present disclosure.
  • FIG. 20 shows a flush cut bag with an easy open feature comprising a semi-circular cut through the bag located near the top end of the bag according to one embodiment of the present disclosure.
  • FIG. 21 shows a pull tab comprising a promotional coupon according to one embodiment of the present disclosure.
  • FIG. 22 shows a flush cut bag with an easy open feature comprising a square cut through the bag located near the bottom end of the bag according to one embodiment of the present disclosure.
  • FIG. 23 shows a pinch cut bag with an easy open feature comprising a square cut through the bag located near the bottom end of the bag according to one embodiment of the present disclosure.
  • FIG. 24 shows a pinch cut bag with an easy open feature comprising a square cut through the bag located near the top end of the bag according to one embodiment of the present disclosure.
  • FIG. 25 shows an outline of a pinch cut bag with an easy open feature comprising a square cut through the bag located near the bottom end of the front panel of the bag according to one embodiment of the present disclosure.
  • FIG. 26 shows an outline of a pinch cut bag with an easy open feature comprising a square cut through the bag located near the top end of the front panel of the bag according to one embodiment of the present disclosure.
  • FIG. 27 shows an outline of a pinch cut bag with an easy open feature comprising a carat cut through the bag located near the top end of a side panel of the bag and extending through the side panel according to one embodiment of the present disclosure.
  • FIG. 28 shows an outline of a pinch cut bag with an easy open feature comprising a carat cut through the bag located near the top end of a side panel of the bag and extending across the entire length of the bag according to one embodiment of the present disclosure.
  • FIG. 29 shows an outline of a pinch cut bag with an easy open feature comprising a carat cut through the bag located near the top end of a side panel of the bag and extending across the side panel and the front panel of the bag according to one embodiment of the present disclosure.
  • FIG. 30 shows an outline of a pinch cut bag with an easy open feature comprising a bidirectional square cut through the bag located near the top end of the front panel of the bag and extending into both side panels according to one embodiment of the present disclosure.
  • FIG. 31 shows a back side view of a pinch cut bag according to one embodiment of the present disclosure.
  • FIG. 32 shows a front side view of a printed pinch cut bag with an easy open feature comprising a square cut through the bag located near the top end of the bag according to one embodiment of the present disclosure.
  • FIG. 33 shows a cross-sectional view of a top end or bottom end portion of a pinch cut bag according to one embodiment of the present disclosure.
  • FIG. 34 shows an isometric view of a pinch cut bag according to one embodiment of the present disclosure.
  • FIG. 1 a planar view of an embodiment of a substantially flat sheet of material from which a "step cut" bag 1 is to be formed is shown. Shown on the sheet are front wall 2, rear wall 3, seam 4, first side wall 5 having gusset portion 6, and second side wall 7 having gusset portion 8. As shown in FIG. 1, the bag 1 has a first or top end 9 and a second or bottom end 10, and thus each of the front wall 2, rear wall 3, first side wall 5 and second side wall 7 has a first or top end and a second or bottom end.
  • Bag 1 is considered a "step cut” bag because the front wall 2, the first side wall 5 and the second side wall 7, and the rear wall 3 are cut so that the front wall 2, the first side wall 5 and the second side wall 7, and the rear wall 3 have different lengths on one end (or both ends) of the bag. As shown in FIG. 1, the first side wall 5 and the second side wall 7 are cut to different lengths on either side of the gusset portion 6 and 8, respectively. As shown in FIG.
  • the first end 9 of bag 1 has portions 3 a and 3 b of the rear wall 3 of the bag that extend further from the body of the bag 1 than do portions 5a and 7a of the first side wall 5 and second side wall 7, respectively, which in turn extend further from the body of the bag 1 than do portions 5b and 7b of the first side wall 5 and second side wall 7, respectively, which in turn extend further from the body of the bag 1 than does the top end of the front wall 2 of the bag 1.
  • the bottom end of the front wall 2 at the second end 10 of bag 1 extends further from the body of the bag 1 than do portions 5c and 7c of the first side wall 5 and second side wall 7, respectively, which in turn extend further from the body of the bag 1 than do portions 5d and 7d of the first side wall 5 and second side wall 7, respectively, which in turn extend further from the body of the bag 1 than do portions 3c and 3d the bottom end of the rear wall 3 of the bag 1. Therefore, in the embodiment shown in FIG.
  • weakened portion 20 which in this embodiment is near the first end 9 of the bag 1 and comprises a plurality of perforations 21 extending from a first end 21a on the front wall 2 of the bag 1 across the first side wall 5 of the bag 1 to a second end 21b on the rear wall 3 of the bag 1.
  • the weakened area may be on or near the fold line (not shown) for closing or sealing the first end 9 of the bag 1. This weakened portion can be opened with less force than required to open or tear other portions of the bag 1.
  • FIG. 2 the upper portion of the bag 1 from FIG. 1 is shown after forming a tube from the bag sheet and then separating a portion of the tube to form a bag and sealing the first end 9 of the bag 1. Visible in FIG. 2 is front wall 2, back wall 3 having portions 3a and 3b, seam 4, first side wall 5 having gusset portion 6, and weakened portion 20 comprising a plurality of perforations 21 terminating at second end 21b.
  • Bag 1 can be opened as shown in FIG. 3 through FIG. 6.
  • FIG. 3 once again shows the upper portion of the bag 1 from FIG. 2, and visible is front wall 2, back wall 3 having portions 3a and 3b, seam 4, first side wall 5 having gusset portion 6, and weakened portion 20 comprising a plurality of perforations 21 terminating at second end 21b.
  • Bag 1 may be opened by initially pulling on the portions 3' and 3" of the rear wall 3 on both sides of the plurality of perforations 21, which creates a tear in the weakened portion 20 of the bag 1 and begins separating the portions of the first side wall 5 that are separated by the gusset portion 6.
  • FIG. 3 once again shows the upper portion of the bag 1 from FIG. 2, and visible is front wall 2, back wall 3 having portions 3a and 3b, seam 4, first side wall 5 having gusset portion 6, and weakened portion 20 comprising a plurality of perforations 21 terminating at second end 21b.
  • Bag 1 may be opened by initially pulling on the portions 3' and 3" of
  • FIG. 4 the portions 3' and 3" of the rear wall 3 on both sides of the plurality of perforations 21 are further pulled apart, resulting in the expansion of the tear in the weakened portion 20 toward the second end 21b of the plurality of perforations 21.
  • FIG. 5 the portions 3' and 3" of the rear wall 3 on both sides of the plurality of perforations 21 are pulled completely apart, resulting in the expansion of the tear in the weakened portion 20 further toward the second end 21b of the plurality of perforations 21 and to the first end 21a of the plurality of perforations (not visible in FIG. 5).
  • FIG. 5 Additionally visible in FIG. 5 are front wall 2, back wall 3 having portions 3a and 3b, and seam 4.
  • the plurality of perforations 21 are pulled completely apart, resulting in the expansion of the tear in the weakened portion 20 to the second end 21b of the plurality of perforations 21.
  • FIG. 7 the upper portion of the bag 1 from FIG. 1 is shown after sealing the first end 9 of the bag 1, with optional adhesive 30 located near the top end of the first side wall 5, which serves to keep the top end of the first side wall 5 closed (see arrows).
  • the optional adhesive can also be applied near the top end of the second side wall.
  • the adhesive can be applied in any manner that results in the closure of the top end of the first side wall 5, for example as a strip that runs from the edge of the intersection of the first side wall 5 and the back wall 3 to the edge of the intersection of the first side wall 5 and the front wall 2.
  • front wall 2 back wall 3 having portions 3 a and 3b, seam 4, first side wall 5 having gusset portion 6, and weakened portion 20 comprising a plurality of perforations 21 terminating at second end 21b.
  • the bag 1 can be filled with the desired contents or filling materials.
  • a bag 1 with dimensions of 16.5 inches by 6.5 inches by 39.5 inches can durably hold up to about fifty five (55) pounds of material without showing undue stress, undue tearing, undue breakage, undue deformation, or leakage or the like. It is believed that any bulk material can be contained by bag 1 , and in certain embodiments the contents can weigh up to 100 pounds or so without undue risk of tearing or damage to bag 1.
  • the second end typically needs to be sealed. The second end of the bag 1 can be sealed in a similar manner as that described above.
  • the bag 1 can have its second end sealed by conventional means such as sewing. Still another approach is to stitch the second end, and then seal the second end in a manner like that described above (not shown). Although not shown, those skilled in the art will understand and appreciate that a second end of bag 1 can be sealed using any conventional technique once bag 1 has been filled with the selected amount of the desired material.
  • FIG. 8 a planar view of an embodiment of a substantially flat sheet of material from which a "step cut" bag 101 is to be formed is shown. Shown on the sheet are front wall 102, rear wall 103, seam 104, first side wall 105 having gusset portion 106, and second side wall 107 having gusset portion 108. As shown in FIG. 8, the bag 101 has a first or top end 109 and a second or bottom end 110, and thus each of the front wall 102, rear wall 103, first side wall 105 and second side wall 107 has a first or top end and a second or bottom end.
  • Bag 101 is considered a "step cut” bag because the front wall 102, the first side wall 105 and the second side wall 107, and the rear wall 103 are cut so that the front wall 102, the first side wall 105 and the second side wall 107, and the rear wall 103 have different lengths on one end (or both ends) of the bag. As shown in FIG. 8, the first side wall 105 and the second side wall 107, and the rear wall 103 have different lengths on one end (or both ends) of the bag. As shown in FIG. 8, the first side wall
  • the first end 109 of bag 101 has portions 103a and 103b of the rear wall 103 of the bag that extend further from the body of the bag 101 than do portions 105a and 107a of the first side wall 105 and second side wall 107, respectively, which in turn extend further from the body of the bag 101 than do portions 105b and 107b of the first side wall 105 and second side wall 107, respectively, which in turn extend further from the body of the bag 101 than does the top end of the front wall 102 of the bag 101.
  • the bottom end of the front wall 102 at the second end 110 of bag 101 extends further from the body of the bag 101 than do portions 105c and 107c of the first side wall 105 and second side wall 107, respectively, which in turn extend further from the body of the bag 101 than do portions 105d and 107d of the first side wall 105 and second side wall 107, respectively, which in turn extend further from the body of the bag 101 than do portions 103 c and 103 d the bottom end of the rear wall 103 of the bag 101. Therefore, in the embodiment shown in FIG.
  • both of the ends of the bag 101 have a "step cut.”
  • the portions 105a and 105b, 107a and 107b, 105c and 105d, and 107c and 107d are not separated by a straight line, but rather by an angled cut (see circles). Although in FIG. 8 this cut is shown as about 45°, the angle can vary in different embodiments (not shown), such as from 15° to 75° with respect to the top end of the bag wall. This angled cut serves to further prevent leakage of contents out of the bag, or infestation of organisms into the contents of the bag.
  • weakened portion 120 which in this embodiment is near the first end 109 of the bag 101 and comprises a plurality of perforations 121 extending from a first end 121a on the front wall 102 of the bag 101 across the first side wall 105 of the bag 101 to a second end 121b on the rear wall 103 of the bag 101.
  • the weakened area is generally on or near the fold line (not shown) for closing or sealing the first end 109 of the bag 101. This weakened portion can be opened with less force than required to open or tear other portions of the bag 101.
  • FIG. 9 a planar view of an embodiment of a substantially flat sheet of material from which a bag 201 is to be formed is shown. Shown on the sheet are front wall 202, rear wall 203, seam 204, first side wall 205 having gusset portion 206, and second side wall 207 having gusset portion 208.
  • the bag 201 has a first or top end 209 and a second or bottom end 210, and thus each of the front wall 202, rear wall 203, first side wall 205 and second side wall 207 has a first or top end and a second or bottom end.
  • the top end 209 of bag 201 is has a "step cut” because the front wall 202, the first side wall 205 and the second side wall 207, and the rear wall 203 are cut so that the front wall 202, the first side wall 205 and the second side wall 207, and the rear wall 203 have different lengths.
  • the first side wall 205 and the second side wall 207 are cut to different lengths on either side of the gusset portion 206 and 208, respectively.
  • the first end 209 of bag 201 has portions 203a and 203b of the rear wall 203 of the bag 201 that extend further from the body of the bag 201 than do portions 205a and 207a of the first side wall 205 and second side wall 207, respectively, which in turn extend further from the body of the bag 201 than do portions 205b and 207b of the first side wall 205 and second side wall 207, respectively, which in turn extend further from the body of the bag 201 than does the top end of the front wall 202 of the bag 201.
  • the bottom end of the front wall 202, the first side wall 205, the second side wall 207, and the rear wall 203 at the second end 210 of bag 201 each extend the same distance from the body of the bag 201. Therefore, in the embodiment shown in FIG. 9 the bottom end 210 of the bag 201 has what is sometimes referred to as a "flush cut.” Although not shown, in certain embodiments the top end of the bag can be flush cut, and the bottom end of the bag can be step cut.
  • weakened portion 220 which in this embodiment is near the first end 209 of the bag 201 and comprises a plurality of perforations 221 extending from a first end 221a on the front wall 202 of the bag 201 across the first side wall 205 of the bag 201 to a second end 221b on the rear wall 203 of the bag 201.
  • the weakened area is generally on or near the fold line (not shown) for closing or sealing the first end 209 of the bag 201.
  • This weakened portion can be opened with less force than required to open or tear other portions of the bag 201.
  • FIG. 10 a planar view of an embodiment of a substantially flat sheet of material from which a flush cut bag 301 is to be formed is shown. Shown on the sheet are front wall 302, rear wall 303, seam 304, first side wall 305 having gusset portion 306, and second side wall 307 having gusset portion 308. As shown in FIG. 10, the bag 301 has a first or top end 309 and a second or bottom end 310, and thus each of the front wall 302, rear wall 303, first side wall 305 and second side wall 307 has a first or top end and a second or bottom end.
  • the top end 309 of bag 301 has a "flush cut” because the front wall 302, the first side wall 305 and the second side wall 307, and the rear wall 303 are cut to the same length.
  • the bottom end of the front wall 302, the first side wall 305, the second side wall 307, and the rear wall 303 at the second end 310 of bag 301 each extend the same distance from the body of the bag 301. Therefore, in the embodiment shown in FIG.
  • the bottom end 310 of the bag 301 also has a "flush cut.” Also shown is weakened portion 320, which in this embodiment is near the first end 309 of the bag 301 and comprises a plurality of perforations 321 extending from a first end 321a on the front wall 302 of the bag 301 across the first side wall 305 of the bag 301 to a second end 321b on the rear wall 303 of the bag 301.
  • the weakened area is generally on or near the fold line (not shown) for closing or sealing the first end 309 of the bag 301. This weakened portion can be opened with less force than required to open or tear other portions of the bag 301.
  • FIG. 11 a planar view of an embodiment of a substantially flat sheet of material from which a "step cut" bag 401 is to be formed is shown. Shown on the sheet are front wall 402, rear wall 403, seam 404, first side wall 405 having first gusset portion 406, and second side wall 407 having second gusset portion 408. As shown in FIG. 11, the bag 401 has a first or top end 409 and a second or bottom end 410, and thus each of the front wall 402, rear wall 403, first side wall 405 and second side wall 407 has a first or top end arid a second or bottom end.
  • Bag 401 is considered a "step cut” bag because the front wall 402, the first side wall 405 and the second side wall 407, and the rear wall 403 are cut so that the front wall 402, the first side wall 405 and the second side wall 407, and the rear wall 403 have different lengths on both ends of the bag. As shown in FIG. 11, the first side wall 405 and the second side wall 407 are cut to different lengths on either side of the gusset portion 406 and 408, respectively. As shown in FIG.
  • the first end 409 of bag 401 has portions 403a and 403b of the rear wall 403 of the bag that extend further from the body of the bag 401 than do portions 405a and 407a of the first side wall 405 and second side wall 407, respectively, which in turn extend further from the body of the bag 401 than do portions 405b and 407b of the first side wall 405 and second side wall 407, respectively, which in turn extend further from the body of the bag 401 than does the top end of the front wall 402 of the bag 401.
  • the bottom end of the front wall 402 at the second end 410 of bag 401 extends further from the body of the bag 401 than do portions 405c and 407c of the first side wall 405 and second side wall 407, respectively, which in turn extend further from the body of the bag 401 than do portions 405d and 407d of the first side wall 405 and second side wall 407, respectively, which in turn extend further from the body of the bag 401 than do portions 403 c and 403d the bottom end of the rear wall 403 of the bag 401. Therefore, in the embodiment shown in FIG.
  • both of the ends of the bag 401 have a "step cut.”
  • one or both ends of the bag can be a different type of step cut, or another type of cut altogether, for example a flush cut end as described herein.
  • the portions 403a and 405a, 405b and 402a, 402a and 407b, 407a and 403b, 403c and 405d, 405c and 402c, 402c and 407c, and 407d and 403d, respectively, are separated from one another not by straight lines and right angles but by curved portions or edges, which in FIG. 11 are shown as radial (circular) elements.
  • radial portion is shown in FIG. 11, for the features between the foregoing portions, those skilled in the art will appreciate that in other embodiments (not shown), these radial portions can be as small or as large as desired.
  • the portions 405a and 405b, 407a and 407b, 405c and 405d, and 407c and 407d, respectively, are not defined or separated by a radial portion or edge, but rather an angled portion or edge (see circles). Although in FIG. 11 this angled portion is shown as about 45° with respect to the top end of the front wall, the angle can vary in different embodiments (not shown).
  • These radial and angled portions serve to further prevent breakage, leakage of contents out of the bag, or infestation of organisms into the contents of the bag, by providing extra material at one end of the bag that improves sealing.
  • FIG. 11 Further shown in FIG. 11 is cut-out 41 1 and corresponding tab 412 at opposing ends of the seam 404. Since the bag 401 is formed from a continuous sheet of material, the formation of the cut-out 411 (removal of material) at one end of the bag 401 results in a tab 412 (extra material) at the other end of the bag 401. The cut out 411 and tab 412 extend into the seam 404, and also serve to further prevent breakage, leakage of contents out of the bag, or infestation of organisms into the contents of the bag.
  • the cut-out 411 and tab 412 are shown as extending from within the seam 404 to the edge of the rear panel 403b of the bag, in other embodiments (not shown) the cut-out and tab can extend from within the seam 404 only a portion of the distance to the edge of the rear panel 403b of the bag 401.
  • the tab and cut-out are illustrated as primarily rectangular in shape. It is understood that the shape is not limited to rectangles but can also be configured as an angular or rounded cut-out and matching tab as long as the configuration fits together to form a seal effective to prevent leakage or infestation.
  • the bag can comprise an easy open or easy access feature, such as the weakened portion near the top of the bag as shown herein above (for example in FIG. 8), or one or more of the easy open features detailed in United States Patent Application Publication Number US 2013/0206631 and/or United States Patent Application Publication Number US 2013/0209002, each of which is incorporated by reference herein in its entirety.
  • an easy open or easy access feature such as the weakened portion near the top of the bag as shown herein above (for example in FIG. 8), or one or more of the easy open features detailed in United States Patent Application Publication Number US 2013/0206631 and/or United States Patent Application Publication Number US 2013/0209002, each of which is incorporated by reference herein in its entirety.
  • FIG. 12 a planar view of the top portion of an embodiment of a substantially flat sheet of material from which a bag 501 is to be formed is shown. Shown on the sheet are front wall 502, rear wall 503, seam 504, first side wall 505 having first gusset portion 506, and second side wall 507 having second gusset portion 508. As shown in FIG. 12, the bag 501 has a first or top end 509 and a second or bottom end 510 (not visible in FIG. 12), and thus each of the front wall 502, rear wall 503, first side wall 505 and second side wall 507 has a first or top end and a second or bottom end.
  • the top end 509 of bag 501 has a "step cut” because the front wall 502, the first side wall 505 and the second side wall 507, and the rear wall 503 are cut so that the front wall 502, the first side wall 505 and the second side wall 507, and the rear wall 503 have different lengths. As shown in FIG. 12, the first side wall 505 and the second side wall 507 are cut to different lengths on either side of the gusset portion 506 and 508, respectively. As shown in FIG.
  • the first end 509 of bag 501 has portions 503a and 503b of the rear wall 503 of the bag 501 that extend further from the body of the bag 501 than do portions 505a and 507a of the first side wall 505 and second side wall 507, respectively, which in turn extend further from the body of the bag 501 than do portions 505b and 507b of the first side wall 505 and second side wall 507, respectively, which in turn extend further from the body of the bag 501 than does the top end of the front wall 502 of the bag 501.
  • the portions 503a and 505a, 505a and 505b, 505b and 502a, 502a and 507b, 507b and 507a, and 507a and 503b, respectively, are separated not by straight lines and right angles but by curved portions or edges, such as radial (circular) portions as shown.
  • curved portions or edges such as radial (circular) portions as shown.
  • radial (circular) portions as shown.
  • these curved edges can be of different shapes (e.g., elliptical, or different segments of a curve, etc.), and can be as small or as large as desired.
  • These curved portions serve to further prevent breakage or leakage of contents out of the bag, or infestation of organisms into the contents of the bag.
  • FIG. 12 Further shown in FIG. 12 is cut-out 511 at one end of the seam 504 (corresponding tab 512 at the other end of the seam 504 is not shown in FIG. 12). Since the bag 501 is formed from a continuous sheet of material, formation of the cut-out 511 (removal of material) at one end of the bag 501 results in a tab (extra material; not shown in FIG. 12) at the other end of the bag 501.
  • the cut out 511 and tab extend into the seam 504, and also serve to further prevent breakage, leakage of contents out of the bag, or infestation of organisms into the contents of the bag.
  • the cut-out 511 and tab can be any depth/height desired, and can extend further into the seam as desired (not shown).
  • the cut-out 511 (and corresponding tab, not shown) is shown as extending from within the seam 504 to the edge of the rear panel 503b of the bag, in other embodiments (not shown) the cut-out (and tab) can extend from within the seam 504 only a portion of the distance to the edge of the rear panel 503b of the bag.
  • the bag can comprise an easy open or easy access feature, such as the weakened portion near the top of the bag as shown herein above (for example in FIG. 8), or one or more of the easy open features detailed in United States Patent Application Publication Number US 2013/0206631 and/or United States Patent Application Publication Number US 2013/0209002, each of which is incorporated by reference herein in its entirety.
  • FIG. 13 A shown is an outline of a portion of one end of a bag 600 with a step cut end, generally corresponding to a mirror image of the region marked as "A" in FIG. 11, detailing an alternate embodiment with angled portions between the front panel 602 of the bag and the first section of the side wall 607', between the first section of the side wall 607' and the second section of the side wall 607", and between the second section of the side wall 607" and the back panel 603 of the bag, respectively, and a feature 613 at one end of the bag that extends into the seam. Since the bag 600 is formed from a continuous sheet of material, the feature 613 forms a cut-out 611 (removal of material; see FIG.
  • FIG. 13B shows an image of one end of the bag depicted in FIG. 13A upon sealing the seam 604, showing cut-out 611.
  • FIG. 13C shows an image of the other end of the bag depicted in FIG. 13A upon sealing the seam 604, showing the tab 612.
  • FIG. 14A shown is an outline of a portion of one end of a bag 700 with a step cut end, generally corresponding to a mirror image of the region marked as "A" in FIG. 11, detailing an alternate embodiment with a combination of radial and angled cuts between the front panel 702 of the bag and the first section of the side wall 707', between the first section of the side wall 707' and the second section of the side wall 707", and between the second section of the side wall 707” and the back panel 703 of the bag, respectively, and a feature 713 at one end of the bag 700 that extends into the seam.
  • the feature 713 forms a cut-out 711 (removal of material; see FIG. 14B) at one end of the bag 700 and a tab 712 (extra material; see FIG. 14C) at the other end of the bag 700.
  • FIG. 14B shows an image of one end of the bag depicted in FIG. 14A upon sealing the seam 704, showing cut-out 711.
  • FIG. 14C shows an image of the other end of the bag depicted in FIG. 14A upon sealing the seam 704, showing the tab 712.
  • FIG. 15A-C A partial view of a bag with an easy open feature is shown in FIG. 15A-C.
  • bag 800 is an example of a bag with the disclosed sealing tape covered weakened area.
  • the top or bottom end 802 is sealed in FIG 15A by folding the top over to a seal line 804 and bonding to seal the opening.
  • a cut out in the surface of the bag is shown to reveal the inner, woven polymer layer of a multi-layered bag as described herein, in which laminated bags can be composed of two or more layers including a woven polymer layer.
  • the woven polymer layer includes woven strips of polypropylene, high density polyethylene, low density polyethylene, polyester, or combinations of any thereof.
  • a second layer can include polypropylene, polyethylene, polyethylene terephthalate, polyamide, or any combination thereof, or it can include 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 can include a printed area thereon.
  • An easy open feature includes a sealing tape 806 covering a weakened area (visible in FIGs. 15B and 15C).
  • the sealing tape includes two strings 808 affixed to the bottom or embedded in the sealing tape and running the length of the sealing tape and a tab 812 at one end.
  • the tab area is not affixed to the surface of the bag, and in certain embodiments is free of adhesive and in certain embodiments is free of adhesive at least on the bottom surface.
  • the unsealed end 814 of the bag is step cut as described herein wherein the junctions 818 between the back wall 816, the back 820 and front side walls 824 at the gusset fold lines 822, and the junction 826 of the front side wall with the front wall 830 are curves, non-right angles or combinations of curves and non-right angles.
  • FIG. 15B is a view of the bag of Fig. 15 A in which the sealing tape has been partially raised in preparation for opening the bag by pulling up on the tab 812 separating the center section of the tape 834 along the line of the strings 808 and exposing the weakened area 836 in the front wall 830 of the bag.
  • FIG. 15C shows a bag in which the center section of the sealing tape is further removed, exposing more of the weakened area.
  • the weakened area is a line of perforations.
  • FIG. 16A-C A partial view of a bag with an easy open feature is shown in FIG. 16A-C.
  • bag 900 is an example of a bag with a sealing tape covered weakened area.
  • the top or bottom end, 906 which is nearer to the easy open feature, is sealed in FIG. 16A by folding the top over to a seal line 904 and bonding to seal the opening.
  • An easy open feature includes a sealing tape 902 covering a weakened area.
  • the sealing tape includes a narrower strip of tape 910 affixed to the surface of the bag or to the bottom or top surface of the sealing tape and running the length of the sealing tape.
  • the sealing tape includes a tab 912 at one end.
  • FIG. 16B is a view of the bag of Fig. 16A in which the narrower strip of tape 910 down the center of the sealing tape 902 has been lifted by the tab end in which the tab 912 is shown not to be adhered to the surface of the bag.
  • Fig. 16C is a view of the bag in which the tape has been lifted by the tab end to partially reveal the weakened area 914 in the surface of the bag below the tape.
  • Figs. 17A and 17B are partial views of a bag with an easy open feature as described for the bags shown in Fig. 15A-C and/or 16A-C in which the sealing tape has not been applied.
  • the weakened area shown in Fig. 17A is a line of perforations 1036 extending across the face of the front or rear wall of the bag in a line substantially parallel to the sealed top or bottom edge 1002 of the front or back wall of the bag.
  • the bag is sealed by folding over the edge to a seal line 1004 and bonding the folded portion to the face of the front or back wall to seal the bag.
  • the bag shown in Fig. 17B is similar, including a top edge 1002 and seal line 1004. In the embodiment shown in Fig.
  • the weakened area 1036 includes a curve near the center of the weakened area that serves as a thumb tab 1038. It is understood that a weakened area can include alternate configurations of perforations or cuts, including but not limited to 2 rows of cuts or perforations, either in parallel or crossing to form an "X", or cuts or perforations that extend from the center of the weakened area in a downward or upward direction relative to the closest end of the bag.
  • the disclosed bags can be laminated woven sacks or bags.
  • the bags are composed of two or more laminated layers including an inner layer comprised of woven polymer strips.
  • Polymer strips can be extruded polyethylene or polypropylene cut into flat strips of about 1/8 to 1/4 inch in width and woven to produce a continuous woven sheet that is then cut into individual bag blanks.
  • the woven layer can be laminated to a polymer film such as a polyester or polypropylene film, and the two layers can be laminated by a third polyethylene or polypropylene film that laminates the first two layers.
  • the second layer of polymer film can also include graphics printed thereon including reverse printed graphics in order to provide an attractive display for commercial purposes.
  • a bag having its walls comprise a laminate which has two or three (or more) layers, wherein each of the bag wall layers comprises or consists essentially of the same polymer (such as polypropylene or polyethylene), need not use an adhesive material and thus is a non-adhesive laminate, is easy to recycle. Moreover, any scrap or unusable bags resulting from manufacturing can be recycled as well.
  • the woven strips create a bag with the requisite strength to hold large amounts of material under stress and are typically not used in smaller bags, holding ten pounds or less because of the increased cost and complexity of producing heavy duty bags.
  • An inner layer of woven flat polymer strips is shown in Fig. 15A as inset 832.
  • the perforations may include or may be replaced with cuts which are longer, and may include cuts in various shapes in addition to the thumb tab, and the bags of the present disclosure may have both cuts and perforations.
  • the cuts and/or perforations may extend entirely through all layers of the bag wall, or may extend through one or more of the bag wall and not through one or more other layers.
  • the perforations may extend through one or more outer film layers and partially but not entirely through the woven layer.
  • the cuts andVor perforations may include one or more cuts and/or perforations which extend through all three bag layers and others which do not, and may include cuts and/or perforations which extend deeper through one or more layers than other cuts and/or perforations.
  • the cuts and/or perforations may vary in size and/or in shape, such that, for example, one or more cuts or perforations are greater in length and/or width (and/or depth) than one or more other cuts and/or perforations.
  • the sealing tape and/or fibers may comprise polymers, such as polypropylene, polyethylene, or combinations thereof, and can include woven polymers or woven polymer strips. It will be appreciated it may be possible to provide a bag in which the two, three, or possibly more layers, as well as the tape and fibers, all comprise a single material or a combination of materials, thus making it much easier to recycle a bag or scrap for manufacturing purposes and also minimized the costs of the bag.
  • the bag wall layers may comprise a non-adhesive laminate which is made of a single polymer (such as polyethylene or polypropylene), with the strings and tape also made of the same material or combination thereof as the bag wall layers.
  • the strings may themselves comprise a braided or woven string with one or more separate fibers or strings braided together (or woven together) to provide greater strength.
  • a sealing tape and substantially parallel strings may be added to the interior surface of the bag wall.
  • a pull tab is provided which extends from the tape and from the exterior surface of the bag wall, or a pull tab can be added to the tape.
  • a customer can pull the pull tab and the tape will pull the bag wall defined by the cuts and/or perforations (i.e., the weakened area of the bag wall) with the tape, thus providing an opening for access to the bag contents.
  • Bag 2001a has a front wall 2010, a back wall 2011, a first side wall 2012, a second side wall 2013, a top end 2014, and a bottom end 2015. It will be apparent, however, that the orientation of the bag ends 2014 and 2015 is unimportant and the "top” and “bottom” references are useful but may change depending on the orientation one views the bag. Bag 2001a is considered a "flush cut” bag because the front wall 2010 and the back wall 2011 are cut so that the ends of the front wall 2010 and the back wall 2011 are essentially "flush” with one another; they have substantially the same length.
  • Bag 2001a also comprises an easy open feature 2020 near the top end 2014 of the bag 2001a, which in this embodiment comprises a full cut 2021 in a rectangular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001a, a first row of perforations 2022 extending from the first end 2021a of the cut 2021, a second row of perforations 2023 extending from the second end 2021b of the cut 2021, an optional third row of perforations 2024 connecting the end of the first row of perforations 2022 and the second row of perforations 2023, tape 2025 covering the cut and the rows of perforations, and a pull tab 2026 attached to the tape 2025.
  • an easy open feature 2020 near the top end 2014 of the bag 2001a, which in this embodiment comprises a full cut 2021 in a rectangular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001a, a first row of perforations 2022 extending from the first end 2021a
  • the easy open feature 2020 is located near the top end 2014 of the bag 2001a and the pull tab is located close to the second side wall 2013, the skilled artisan will realize that the easy open feature 2020 could also be in the opposite orientation, with the pull tab located closer to the first side wall 2012, reside in either orientation near the bottom end 2015 of the front wall 2010 of bag 2001a, or reside in either orientation near the top end 2014 or bottom end 2015 on the back wall 2011 of the bag 2001a.
  • the full cut 2021 can be formed by punching, cutting, or through the use of a laser, or by any other technique known to those skilled in the art.
  • the easy open feature 2020 (in this embodiment the cut 2021 and/or first 2022 or second 2023 row of perforations) provides a portion of bag 2001a that is weakened. This weakened portion can be opened with less force than required to open or tear other portions of the bag 2001a.
  • Bag 2001a can be opened by pulling the pull tab 2026, which removes the tape 2025 and the portion of bag 2001a defined by the cut 2021 and the first, second, and third row of perforations 2022, 2023, and 2024, respectively.
  • the full cut 2021 can be larger or smaller, and can extend to a greater or lesser extent
  • the first and second rows of perforations 2022 and 2023 respectfully, can extend any distance from the first end and second end, respectively, of the cut toward the opposite side wall of the bag, for example 50%, 75%, 90% or about 100% of the distance from the ends of the cut to the opposite side of the bag.
  • the tape 2025 can cover less than the full extent of the first and second rows of perforations, whatever distance the rows of perforations extend across the front wall of the bag, and in certain embodiments covers only the full cut portion of the easy open feature 2020.
  • the pull tab 2026 can comprise black and white and/or color printing (not shown), for example a coupon (not shown), and can also be used to reclose the bag.
  • Bag 2001b also has a front wall 2010, a back wall 2011, a first side wall 2012, a second side wall 2013, a top end 2014, and a bottom end 2015.
  • Bag 2001b also comprises an easy open feature 2020, which in this embodiment is near the bottom end 2015 of the bag 2001b and comprises a full cut 2021 in a triangular or carat shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001b, a first row of perforations 2022 extending from the first end 2021a of the cut 2021, a second row of perforations 2023 extending from the second end 2021b of the cut 2021, an optional third row of perforations 2024 connecting the end of the first row of perforations 2022 and the second row of perforations 2023, tape 2025 covering the cut and the rows of perforations, and a pull tab 2026 attached to the tape 2025.
  • an easy open feature 2020 which in this embodiment is near the bottom end 2015 of the bag 2001b and comprises a full cut 2021 in a triangular or carat shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001b, a first row of per
  • Bag 2001c also has a front wall 2010, a back wall 2011, a first side wall 2012, a second side wall 2013, a top end 2014, and a bottom end 2015.
  • Bag 2001c also comprises an easy open feature 2020, which in this embodiment is near the top end 2014 of the bag 2001c and comprises a full cut 2021 in a semi-circular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001c, a first row of perforations 2022 extending from the first end 2021a of the cut 2021, a second row of perforations 2023 extending from the second end 2021b of the cut 2021, an optional third row of perforations 2024 connecting the end of the first row of perforations 2022 and the second row of perforations 2023, tape 2025 covering the cut and the rows of perforations, and a pull tab 2026 attached to the tape 2025.
  • an easy open feature 2020 which in this embodiment is near the top end 2014 of the bag 2001c and comprises a full cut 2021 in a semi-circular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001c, a first row of perforations 2022
  • tape 2025 and pull tab 2026 are shown, where tape 2025 covers the full cut 2021 in a semi-circular shape having a first end 2021a and a second end 2021b, but does not cover the full extent of the first row of perforations 2022 and the second row of perforations 2023, and does not cover the third row of perforations 2024.
  • the pull tab 2026 includes instructions to open the bag, but can also comprise black and white and/or color printing (not shown), for example a promotional coupon (not shown).
  • Bag 2001d also has a front wall 2010, a back wall 2011, a first side wall 2012, a second side wall 2013, a top end 2014, and a bottom end 2015.
  • Bag 2001d also comprises an easy open feature 2020, which in this embodiment is near the bottom end 2015 of the bag 200 Id and comprises a full cut 2021 in a rectangular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001d, a first row of perforations 2022 extending from the first end 2021a of the cut 2021, a second row of perforations 2023 extending from the second end 2021b of the cut 2021, an optional third row of perforations 2024 connecting the end of the first row of perforations 2022 and the second row of perforations 2023, tape 2025 covering the cut and the rows of perforations, and a pull tab 2026 attached to the tape 2025.
  • an easy open feature 2020 which in this embodiment is near the bottom end 2015 of the bag 200 Id and comprises a full cut 2021 in a rectangular shape having a first end 2021a and a second end 2021b through the front wall 2010 of bag 2001d, a first row of perforations 2022 extending from the
  • FIG. 23 the front side view of one embodiment of a "pinch cut” bag 2100a is shown.
  • the bag 2100a has a first or top end 2105 and a second or bottom end 2110.
  • Bag 2100a is considered a "pinch cut” bag because one of the front wall 2108 or the back wall 2106 are cut so that one of the ends of the front wall 2108 or the back wall 2106 is longer than the other; they have different lengths.
  • both of the ends of the bag 2100a have a "pinch cut.”
  • the bag 2100a has a front wall or surface 2108 with top end 2116, a rear wall or surface 2106, and two side walls 2102 and 2103.
  • the first end 2105 of bag 2100a has portions 2112a and 2112b of the rear wall or surface 2108 of the bag that extend further from the body of the bag 2100a than do portions 2114a and 2114b of the material of bag 2100a forming the side gussets for sides 2102 and 2103.
  • the portions 2114a and 2114b of the side gussets extend further from the body of the bag 2100a than the top end 2116 of the front wall 2108 of the bag 2100a.
  • the front wall 2108 of the bag 2100a has an end portion 2116 at the first end 2105 of the bag that does not extend as far from the body of the bag 2100a as the end portions 2114a and 2114b of the side gussets or the end portions 2112a and 2112b of the rear wall of the first end 2105 of the bag 2100a.
  • Bag 2100a also comprises an easy open feature 2120 near the top end 2105 of the bag 2100a, which in this embodiment comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100a, a first row of perforations 2122 extending from the first end 2121a of the cut 2121, a second row of perforations 2123 extending from the second end 2121b of the cut 2121, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, tape 2125 covering the cut and the rows of perforations, and a pull tab 2126 attached to the tape 2125.
  • an easy open feature 2120 near the top end 2105 of the bag 2100a, which in this embodiment comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100a, a first row of perforations
  • FIG. 24 the front side view of another embodiment of a pinch cut bag 2100b is shown.
  • the bag 2100b has a first or top end 2105 and a second or bottom end 2110.
  • the bag 2100b has a front wall or surface 2108 with top end 2116, a rear wall or surface 2106, and two side walls 2102 and 2103.
  • the first end 2105 of bag 2100b has portions 2112a and 2112b of the rear wall or surface 2108 of the bag that extend further from the body of the bag 2100b than do portions 2114a and 2114b of the material of bag 2100 forming the side gussets for sides 2102 and 2103.
  • the portions 2114a and 2114b of the side gussets extend further from the body of the bag 2100b than the top end 2116 of the front wall 2108 of the bag 2100b.
  • the front wall 2108 of the bag 2100b has an end portion 2116 at the first end 2105 of the bag that does not extend as far from the body of the bag 2100b as the end portions 2114a and 2114b of the side gussets or the end portions 2112a and 2112b of the rear wall of the first end 2105 of the bag 2100b.
  • Bag 2100b also comprises an easy open feature 2120, which in this embodiment is near the bottom end 2110 of the bag 2100b and comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100b, a first row of perforations 2122 extending from the first end 2121a of the cut 2121, a second row of perforations 2123 extending from the second end 2121b of the cut 2121, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, tape 2125 covering the cut and the rows of perforations, and a pull tab 2126 attached to the tape 2125.
  • an easy open feature 2120 which in this embodiment is near the bottom end 2110 of the bag 2100b and comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100b, a first row of
  • FIG. 25 a planar view of an embodiment of a substantially flat sheet of material from which a bag 2100c is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the bottom end 2110 of the front wall 2108 of the bag 2100c and comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100c, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the front wall 2108 of bag 2100a, a second row of perforations 2123 extending from the second end 2121b of the cut 2121 across the front wall 2108 of bag 2100c, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, tape 2125 covering the cut 2121 and the rows of perforations, and a pull tab 2126 attached to the tape 2125.
  • FIG. 26 a planar view of another embodiment of a substantially flat sheet of material from which a bag 2100d is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the top end 2105 of the front wall 2108 of the bag 2100d and comprises a full cut 2121 in a rectangular shape having a first end 2121a and a second end 2121b through the front wall 2108 of bag 2100d, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the front wall 2108 of bag 2100d, a second row of perforations 2123 extending from the second end 2121b of the cut across the front wall 2108 of bag 2100d, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, tape 2125 covering the cut 2121 and the rows of perforations, and a pull tab 2126 attached to the tape 2125.
  • FIG. 27 a planar view of another embodiment of a substantially flat sheet of material from which a bag 2100e is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the top end 2105 of the second side 2103 of the bag 2100e and comprises a full cut 2121 in a carat shape having a first end 2121a and a second end 2121b through the second side 2103 of bag 2100e, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the second side 2103 of bag 2100e, a second row of perforations 2123 extending from the second end 2121b of the cut 2121 across the second side 2103 of bag 2100e, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, and a pull tape 2127 covering the cut 2121 and a small portion of the first row of perforations 2122 and second row of perforations 2123.
  • FIG. 28 a planar view of another embodiment of a substantially flat sheet of material from which a bag 2100f is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the top end 2105 of the second side 2103 of the bag 2100f and comprises a full cut 2121 in a carat shape having a first end 2121a and a second end 2121b through the second side 2103 of bag 2100f, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the second side 2103, front wall 2108, first side 2102 and rear wall 2104 of bag 2100f, a second row of perforations 2123 extending from the second end 2121b of the cut 2121 across the second side 2103, front wall 2108, first side 2102 and rear wall 2104 of bag 2100f, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, and a pull tape 2127 covering the cut 2121 and a small portion of the first row of perforations 2122 and second row of perforations 2123.
  • FIG. 29 a planar view of another embodiment of a substantially flat sheet of material from which a bag 2100g is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the top end 2105 of the second side 2103 of the bag 2100g and comprises a full cut 2121 in a carat shape having a first end 2121a and a second end 2121b through the second side 2103 of bag 2100g, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the second side 2103, front wall 2108 and into the first side 2102 of bag 2100g, a second row of perforations 2123 extending from the second end 2121b of the cut 2121 across the second side 2103, front wall 2108 and into the first side 2102 of bag 2100g, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, and a pull tape 2127 covering the cut 2121 and a small portion of the first row of perforations 2122 and second row of perforations 2123.
  • FIG. 30 a planar view of another embodiment of a substantially flat sheet of material from which a bag 2100h is to be formed is shown. Shown on the sheet are front wall 2108, rear wall 2106, first side 2102 having gusset portion 2114a, second side 2103 having gusset portion 2114b, seam 2104, top end 2105 and bottom end 2110.
  • easy open feature 2120 which in this embodiment is near the top end 2105 of the front wall 2108 of the bag 2100h and comprises a bidirectional full cut 2121 in a square shape having a first end 2121a, a second end 2121b, a third end 2121c and a fourth end 2121d through the front wall 2108 of bag 2100h, a first row of perforations 2122 extending from the first end 2121a of the cut 2121 across the front wall 2108 and into the first side 2102 of bag 2100h, a second row of perforations 2123 extending from the second end 2121b of the cut 2121 across the front wall 2108 and into the first side 2102 of bag 2100h, an optional third row of perforations 2124 connecting the end of the first row of perforations 2122 and the second row of perforations 2123, a fourth row of perforations 2122a extending from the third end 2121c of the cut 2121 across the front wall 2108 and into the second side 2103 of bag 2100h,
  • FIG. 31 the back side view of yet another embodiment of a pinch cut bag 2100j is shown.
  • the bag 2100j has a first end 2105 and a second end 2110. It is useful to think of first and second ends 2105 and 2110 as the top and bottom ends of the bag 2100j, respectively.
  • the bag 2100j has a front wall or surface 1208, a rear wall or surface 2106, and two side walls 2102 and 2103.
  • the bag 2100j also has a seam 2104 on the back side, or rear wall or surface. The seam 2104 is made when the bag 2100 is formed using conventional methods known to those skilled in the art.
  • a material from which a bag 2100j is to be formed (such materials are discussed in detail below) is provided in a substantially flat sheet (see FIG. 25 through FIG. 30).
  • the sheet is then directed and formed so that a portion of one side of the sheet is disposed on top of the other side of the sheet, such as in forming a tube.
  • the overlapping portion is then secured and sealed together, forming the seam 2104.
  • conventional techniques can be used to provide side gussets in the bag 2100j for each of sides 2102 and 2103 during this forming process.
  • the bottom (as shown in FIG. 31) of the first end 2105 of bag 2100j has portions 2112a and 2112b of the front wall 2108 or surface of the bag that extend further from the body of the bag 2100j than do portions 2114a and 2114b of the material of bag 2100j forming the side gussets for sides 2102 and 2103.
  • the portions 2114a and 2114b of the side gussets extend further from the body of the bag 2100j than the top end 2117 of the rear wall 2106 of the bag 2100j.
  • the rear wall of the bag 2100j has a top end 2117 that does not extend as far from the body of the bag 2100j as the end portions 2114a and 2114b of the side gussets or the end portions 2112a and 2112b of the front wall 2108 of the bag 2100j.
  • the bag 2100k comprises multiple layers of materials 2220, 2222 and 2224.
  • the first layer 2220 is preferably a woven polymeric material, such as polypropylene, polyester, high-density polyethylene, or polyethylene.
  • the woven plastic layer 2220 can be made of woven strips of plastic made of film to provide great strength from relatively lightweight materials, and can also be stretched to provide greater strength. For example, cross-laminated, woven plastic film strips, like XF films, are useful and are commercially available from Valeron.
  • a biaxially oriented polypropylene plastic material is commercially available from the AmTopp Division of Inteplast Group, Ltd. Those skilled in the art will appreciate that other materials, including various blends of polypropylene and polyethylene can be used without departing from the scope of the invention.
  • the layer 2222 is a coating or a lamination, preferably a polypropylene film.
  • Layer 2224 is preferably an oriented polypropylene film with reverse printing.
  • the layer 2224 can comprise reverse printing of various labels, advertising, warnings, and other information as may be desired, such as the cover 2130 shown in FIG. 32.
  • the top side, back side, and sides 2102 and 2103 of the bag 2100 may all contain such pictures, patterns, or information as may be desired.
  • the reverse printing of layer 2224 can be achieved with conventional techniques, and with various conventional plastic films.
  • An advantage of printing the bottom portion of the front and/or back panels is the provision of information that remains visible when the bag is on a display shelf in a store.
  • the bottom side (as shown in FIG. 32) of the bag 2100k extends outward from the body of the bag 2100k at the second end 2110 of the bag 2100k.
  • the top side of the bag 2100k has an end portion 2140 extending along the width of the bag 2100k.
  • the side gussets of the sides 2102 and 2103 of the bag 2100k each have portions 2142a and 2142b which extend further towards the second end 2110 of the bag 2100k than the end portion 2140 of the top side of bag 2100k.
  • the bottom side of the bag 2100k has an end portion 2110 that extends further from the end portions 2142a and 2142b of the side gussets.
  • the end portion 2110 of the bag 2100k includes portions 2144a and 2144b.
  • the second end portion of the bottom side of the bag 2100k extends along the entire width of the bag 2100k. Also shown is seam 2104.
  • the exposed end portions 2144a and 2144b of the bottom side of the bag 2100k can be coated with a durable adhesive.
  • the adhesive can be applied to selective surface areas, such as portions 2144a and 2144b, or can be applied in a line extending across the bottom side of the bag 2100k along the second end portion 2110, including portions 2144a and 2144b.
  • the sides 2102 and 2103 of the bag 2100, together with the bottom side of the bag 2100k are folded so that at least a portion of the interior surface of the bottom side of the bag 2100k extends over the top surface of the top side of the bag 2100k.
  • the portions 2142a and 2142b of the side gussets will be folded over and attached to the top surface of the top side of the bag 2100k, as well as portions 2144a and 2144b of the second end 2110 of the bottom side of the bag 2100k.
  • the coating then seals the second end 2110 of the bag 2100k together.
  • the first end 2105 of the bag 2100k can be sealed in a similar fashion if desired.
  • the first end 2105 or second end 2110 of the bag 2100k can be sealed using a hot melt technique or any other technique well-known to those skilled in the art.
  • FIG. 33 a detailed cross-sectional view of an end portion of the bag 2100 is provided. As shown in FIG. 33, at least a portion of the front side 2130 of bag 2100 is now covered by the lowest edge portion 2110 of the back side of bag 2100, the extending portions 2142a, 2142b of side 2102 of the bag 2100, as well as a portion of the front side 2130 of bag 2100 including end portion 2140. Once these portions are folded over, heat and pressure can be applied as appropriate to obtain and ensure that the bottom end 2110 of bag 2100 is durably sealed, such as with a conventional heat sealable adhesive.
  • the bag 2100 can be filled with the desired materials. It has been found that a bag 2100 with a height of 41 inches and a width of 28 inches can durably hold at least about fifty (50) pounds of material without showing undue stress, tearing, breakage or the like. It is believed that any bulk material can be contained by bag 2100, and the contents can weigh up to 100 pounds or so without undue risk of tearing or damage to bag 2100.
  • the second end typically needs to be sealed.
  • the second end of the bag 2100 can be sealed in a similar manner as that described above for the bottom end 2110.
  • the bag 2100 can have its second end sealed by conventional means such as sewing.
  • Still another approach is to seal the second end in a manner like that described for the bottom end 2110 of the bag 2100, and then stitching one of the two ends (not shown).
  • a second end of bag 2100 can be sealed with conventional techniques once bag 2100 has been filled with the selected amount of the desired material.
  • the bag 3700 includes a front panel 3701, a first side panel with gussets 3709, a second side panel with gussets (not visible in FIG. 34), a top end 3703, and a bottom end 3705.
  • the bag 3700 is a pinch cut bag like those described previously, with both a pinch cut top end 3703 and a pinch cut bottom end 3705.
  • the bag 3700 preferably has a weakened area (not shown in FIG. 34) or other easy open feature on at least one surface (not shown in FIG. 34).
  • the bag 3700 has been filled and sealed and contains one or more materials.
  • the contents of the bag 3700 may be food, animal food, other bulk items, the contents may also contain liquids or mixtures.
  • the bag 3700 once formed in accordance with the present disclosure, may be filled and then either the top end 3703 or the bottom end 3705 or both may be sealed as described previously.
  • the bag 3700 once filled, presents a bottom panel 3707 on the bottom end 3705 thereof and a top panel on the top end thereof (not visible in FIG. 34).
  • the bag 3700 may be stacked on top of similar or different bags, such as at a grocery store, pet store, or other display location, such that panel 3707 is easily visible to a consumer. As shown in FIG.
  • the front panel 3701, the first side panel 3709 and the bottom panel 3707 includes printing (and can also include graphics), and it will be appreciated by the skilled artisan that the top panel, the rear panel, and the second side panel of bag 3700, which are not visible in FIG. 34, can also include graphics and/or printing.
  • bag 3700 has six discrete areas for printing and/or graphics, each formed by a discrete surface area of the bag 3700. Additionally, the printing and/or graphics can extend across more than one panel, or any combination of the six panels (not shown).
  • the panel 3707 may include graphics and/or printing so that a consumer is able to quickly, readily and easily identify the brand of the contents in the bag, such as the brand name for the pet food therein if the bag 3700 contains pet food.
  • the printing or graphics on the panel 3707 may contain information such as price, composition, expiration date, and the like.
  • the panel 3707 may contain printing or graphics that provide a coupon or other price discount or other offer, either on the contents of the bag 3700 or some other product.
  • bag according to the invention may vary in size, dimensions, and shape without departing from the scope of the invention, and that the foregoing description of the preferred embodiments is not intended to limit the scope of the invention as defined by the claims.
  • the disclosed bags can have sealed and sewn ends in a tubular bag with side gussets as shown, or a block bottom and top, or a combination thereof, although not shown.
  • a weakened portion or area can be provided in a number of ways that may vary from those expressly described and shown, such as by stressing portions of the bag wall with or without deforming, perforating, or cutting same, as well as varying the size, number, depth, and/or pattern of perforations, cuts, and/or deformations in a bag wall.
  • the bags may be provided with a re-usable opening (not shown) or a corner portion adapted to allow a person to easily pour out the contents of the bag (not shown), or a combination of those features. Such features are known in certain types of prior art bags.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Abstract

L'invention concerne un sac plastique stratifié tissé pourvu de caractéristiques qui empêchent la fuite de contenus hors du sac, ou l'infestation d'organismes dans les contenus du sac. Selon divers aspects, le sac peut être fabriqué à partir d'une couche de polypropylène et/ou polyéthylène tissée sur laquelle peut être stratifiée une couche formant film ; il peut former un sac à fond pincé et l'une ou les deux faces peuvent présenter des graphiques et/ou des impressions. Le sac peut également présenter une extrémité supérieure et/ou une extrémité inférieure, l'une et/ou les deux extrémités constituant une zone distincte pouvant contenir des graphiques et/ou des impressions distincts. Le sac peut également comprendre un élément à ouverture facile recouvert d'une bande qui facilite le retrait de la bande d'étanchéité étroitement collée.
PCT/US2017/037306 2016-06-14 2017-06-13 Sacs plastiques tissés pourvus de caractéristiques réduisant la fuite, la rupture et l'infestation WO2017218571A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17813957.2A EP3472066B1 (fr) 2016-06-14 2017-06-13 Sac en plastique tissé à ouverture facile et procédé de fabrication d'un tel sac
EP24179235.7A EP4410703A2 (fr) 2016-06-14 2017-06-13 Sacs en plastique tissé ayant des caractéristiques qui réduisent les fuites, la rupture et l'infestation
MX2018015633A MX2018015633A (es) 2016-06-14 2017-06-13 Bolsas de plastico tejidas con caracteristicas que reducen las fugas, la ruptura y la infestacion.
CA3025176A CA3025176A1 (fr) 2016-06-14 2017-06-13 Sacs plastiques tisses pourvus de caracteristiques reduisant la fuite, la rupture et l'infestation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662350127P 2016-06-14 2016-06-14
US62/350,127 2016-06-14
US15/440,970 2017-02-23
US15/440,970 US10759585B2 (en) 2014-04-04 2017-02-23 Woven plastic bags with features that reduce leakage, breakage and infestations

Publications (1)

Publication Number Publication Date
WO2017218571A1 true WO2017218571A1 (fr) 2017-12-21

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PCT/US2017/037306 WO2017218571A1 (fr) 2016-06-14 2017-06-13 Sacs plastiques tissés pourvus de caractéristiques réduisant la fuite, la rupture et l'infestation

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EP (2) EP3472066B1 (fr)
CA (1) CA3025176A1 (fr)
MX (2) MX2018015633A (fr)
WO (1) WO2017218571A1 (fr)

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US20060072856A1 (en) 2004-09-24 2006-04-06 Frank Su Side tear tabless T-shirt style bag pack
US20070021285A1 (en) * 2005-07-25 2007-01-25 Hinesley Steven E Method for installing closure in mouth of pre-made bag
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US20130224346A1 (en) * 2010-03-30 2013-08-29 Cadbury Holdings Limited Packaging
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See also references of EP3472066A4

Also Published As

Publication number Publication date
EP3472066A4 (fr) 2019-12-25
MX2023007539A (es) 2023-07-10
CA3025176A1 (fr) 2017-12-21
EP4410703A2 (fr) 2024-08-07
MX2018015633A (es) 2019-04-11
EP3472066A1 (fr) 2019-04-24
EP3472066B1 (fr) 2024-06-19

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