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
  • 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
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
  • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
• • 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
  • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
  • B65D75/06—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes
  • B65D75/12—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes with the ends of the tube closed by flattening and heat-sealing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
  • B31B70/60—Uniting opposed surfaces or edges; Taping
  • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
  • B31B70/60—Uniting opposed surfaces or edges; Taping
  • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
  • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies

Definitions

• the present invention relates to pouches. Specifically, the present invention relates to pouches which are easy to tear open.
• Pouches are typically formed of a laminate or a film and may be used for holding many types of items such as food, shampoos, detergents, medicines, etc.
• notches, laser cut score lines, and perforations are standard in the packaging industry.
• an easy opening functionality e.g., tear lines, perforations, score lines, etc.
• Many packages such as, for example, laundry detergents do not have tearing lines because during shipment such pouches are often dropped, compressed, etc. which could cause unacceptable leakage. Instead, merely a notch or other slit is made to start the tearing, but no cost-effective technology has been found which can also control the propagation of the tear. Instead, often the pouches are cut open with scissors.
• pre-formed pouches and pouches formed from two layers are more easily customizable and they often possess notches, or perforated tearing lines.
• pre-formed pouches are useful for smaller volumes, they become more difficult for larger volumes, where the volume : sealing area ratio becomes too large.
• the strength of a seal is directly proportional to the sealing area, and a seal is generally weaker than the film material itself. So, as the volume grows, the sealing area may need to grow proportionally, which leads to a large amount of wasted film material and/or a weak pouch which bursts too easily and/or which may leak during shipping, dropping, etc.
• the present invention relates to a perforated large-size easy opening pouch is formed from a single sheet containing at least one layer of a film material, and the sheet forms a volume.
• the pouch also contains a seal containing a perforation. The perforation is completely surrounded by the seal. When a tear is initiated along the perforation, the tear propagates to a non-sealed portion of the pouch.
• a sealing jaw contains a sealing arm with a profiled sealing area further containing a cut blade. The cut blade is completely surrounded by the profiled sealing area.
• the sealing jaw also contains a receiving jaw containing a profiled sealing area further containing a cut channel to receive the cut blade.
• the pouch sealing method herein includes the steps of providing a sheet, forming a tube having a leading edge, sealing the leading edge to form a first seal, filling the tube with a predetermined amount of a product, and simultaneously sealing the tube to form a second seal and cutting the tube to form a pouch filled with the product.
• At least one of the first seal or the second seal comprises a perforation which is completely surrounded by the respective first or second seal.
• the invention can balance easy opening via a tearing line combined with profiled sealing while also maintaining the robustness and strength of a complete seal. Also described herein is a method of and a sealing jaw for sealing and creating the easy opening portion simultaneously with the bag formation and packing. Since the sealing jaw combines the sealing profile with the perforator, it further reduces misalignment of the perforation, optional notch, sealing portions, etc. which could happen if they were formed on different machines, or in different processes.
• Fig. 1 is a front view of an existing comparative pouch having a tear notch
• Fig. 2 is a front view of an embodiment of the pouch herein;
• Fig. 3 is a cut-away view of the embodiment of Fig. 2, as seen along line 3-3;
• Fig. 4 is a close-up front view of an embodiment herein;
• Fig. 5 is a front view of an embodiment of the sealing arm according to the invention herein;
• Fig. 6 is a front view of an embodiment of the receiving arm according to the invention herein;
• Fig. 7 is a front view of an embodiment showing multiple perforations
• Fig. 8 is a close-up front view of an alternate perforation
• Fig. 9 is a close-up front view of an alternate perforation.
• Fig. 10 is a close-up front view of an alternate perforation.
• This disclosure relates to a perforated large-size easy opening pouch formed of a single sheet of film material.
• the pouch contains a perforation which is completely surrounded by a seal, and when a tear is formed along the perforation, the tear propagates to at least one non- sealed portion of the pouch.
• This disclosure also relates to methods and equipment for making such a pouch.
• Fig. 1 is a front view of an existing comparative pouch, 10, having seals, 12, on four sides.
• the seals form a volume, 14, for containing a product.
• the pouch, 10, is typically a pre-formed pouch which is formed from two sheets of film material.
• Pre-formed pouches are typically made by sealing all except for 1 side of the pouch, and either sequentially or concurrently cutting the shape. The product is then filled into the pouch, and the remaining side sealed.
• Such pre-formed pouches are typically used for small volumes of from ⁇ 1 mL up to about 500 mL, but tend not to be used for larger volumes. Occasionally pre-formed standing pouches may be used for larger volumes, such as liquid detergents.
• the comparative pouch in Fig. 1 contains a tear-notch, 16, which provides a starting point and indicator for the user to tear the pouch, and the tear will propagate to a non-sealed portion, such as the spout, 18, and then to somewhere on the sealed side, 12'.
• a tear is not easy to control, and in fact the tear will often times go to very different places on the sealed side, 12'. In other words, it is difficult to reproducibly tear such a pouch.
• the product can be used and/or taken out.
• Fig. 2 is a front view of an embodiment of the pouch, 20, herein which is formed from a single sheet of film material which contains seals, 12 at the top, 22, and bottom, 24.
• the pouch, 20, also has sides, 26, which do not have any seals.
• the pouch, 20, contains a tear-notch, 16, formed in the seal, 12, at the top, 22 which points towards a perforation, 28.
• the perforation, 28, is completely surrounded by the seal, 12" in the X and Y planes parallel to the pouch surface. It is the fact that the perforation, 28, is completely surrounded by the seal, 12', which allows the pouch to tear easily and controllably and yet still have the structural stability and also high bursting resistance.
• a longitudinal seal, 12'" completes the pouch and forms what is commonly known in the art as a "pillow bag".
• the pouch is formed of sheet which is in turn formed from at least one film material typically selected from the group consisting of polyamide (nylon), polyethylene, polypropylene, ethyl-vinyl-acetate, poly-4-methylpentene-l, a microporous membrane, and a combination thereof; or polyamide (nylon), linear low-density polyethylene, an oriented polypropylene, polyethylene terephthalate, and a combination thereof.
• the film material may also be affixed to and/or contain a metal therein, and/or be a metalized film.
• Film materials are well known in the art and may further contain resins, laminates, printed artwork, additives (i.e., UV blockers, antimicrobials, dyes, pigments, etc.), etc. Suitable film materials are available from various suppliers worldwide such as 3M Company (St. Paul, Minnesota, USA), Du Pont Co. (Wilmington, Delaware, USA), Toppan Insatsu Co. (Tokyo, Japan), and Gelman Sciences Company (Ann Arbor, Michigan, USA).
• the sheet herein may contain either a single layer or contain multiple layers of film material, so long as it remains sealable.
• the sheet is from about 15 ⁇ to about 220 ⁇ , or from about 20 ⁇ to about 200 ⁇ , or from about 25 ⁇ to about 160 ⁇ thick.
• Each individual film material may be oriented, or random.
• Multiple layers of film materials may be joined together to form a sheet with multiple properties and/or benefits.
• it is known in the art to join the multiple layers together by, for example, lamination, heat sealing, ultrasonic sealing, gluing, pressure sealing, etc.
• the sheet may then be formed into a pouch by pulling and/or stretching the sheet around a forming tube and sealing the edges in any direction such as the machine direction at any point or the cross direction at either the top and/or the bottom.
• the pouch is sealed in the machine direction to form a tube.
• leading edge is then sealed by a sealing jaw in the cross direction
• the product to be contained in the tube is then filled into the tube, pulled to advance the sheet, and the sealing jaw simultaneously seals and cuts the trailing portion in the cross direction, thereby releasing the filled bag and forming a new leading edge at the same time.
• Machinery and techniques for forming such filled pouches are often referred to as autopacking machines and are well known in the art and available from multiple suppliers around the world.
• the pouch comprises a volume (when sealed) of at least 500 mL, or from about 500 mL to about 100 L, or from about 800 mL to about 60 L, or from about 1 L to about 30 L, or from about 1.5 L to about 20 L.
• the product (not shown) to be filled into the pouch typically has a bulk density of at least 250 g/L, or from about 300 g/L to about 1.3 kg/L, or from about 450 g/L to about 1.1 kg/L.
• Non-limiting examples of the product include a solid product, a granular product, a liquid product, and/or a gel product.
• the product is a granular detergent, a liquid detergent, a food item, a drink item, a fabric softener, a fabric conditioner, a fertilizer, or a chemical, as such items may be easily packed and stored in such a pouch which may be easily opened by hand tearing.
• the food item is a human food item or an animal food item such as a pet food.
• Fig. 3 shows a cut-way view of the embodiment in Fig. 2, as seen along lines 3-3.
• the pouch, 20, is formed of a single sheet of film material, 30, which is connected to itself at seals 12" and 12'" so as to define an internal volume, 14.
• the volume 14 and the volume 14' are actually connected to each other and the same.
• the seals 12" are actually connected to each other and are the same.
• the perforation, 28, (actually a cut, 34, as per Fig.
• Fig. 4 shows a close-up view of an embodiment herein focusing on the top, 22, where the perforation, 28 is located.
• the perforation, 28, is shown as a line of cuts, 32, and in Fig 4 these cuts, 32, are intended to be microdots leading in a straight line from the corner of the tear- notch, 16, diagonally downwards towards the side, 26.
• it is important that the cut, 32 goes substantially through both layers of the sheet, 30, present at the seal, 12" so as to allow easy hand tearing.
• the perforation, 28, herein typically is composed of a line or other predetermined arrangement of a plurality of cuts, 32, in the sheet, 30 with the shape of each cut, 32, being selected from the group consisting of a line, a dot, a triangle, a diamond, a circle, a rectangular, an oval, and a combination thereof, or a line, a dot and a combination thereof, that can enhance directional propagation of the tear.
• each cut, 32 should generally lead in the same direction, so as to be able to guide the propagation of the tear towards the side, 26, and more specifically towards the target tear destination, 34.
• Such guiding of the propagation of the tear is especially effective if at least one film material is in the sheet at least partially oriented, and/or contains an oriented sheet which encourages the tear to propagate in the desired direction.
• the top, 22 forms a line A-A and the perforation, 28, forms a line B-B.
• A-A and B-B intersect to form an angle, ⁇ , that is typically of from about 90° to about 180°; or from about 110° to about 160°, or from about 120° to about 150°.
• the cuts forming the perforation are arranged in a line, a curve, an angle, and a combination thereof (see, Figs. 8-10).
• Fig. 4 indicates a certain perforation distance, PD, which is measured from the beginning of the first cut, 32, along the pattern, often a line, formed by the other cuts, 32, to the farthest portion of the last cut, 32'.
• PD perforation distance
• the dimensions of each cut, 32 will be difficult to measure by the naked eye; however, regardless of the shape of the cut, each cut typically measures less than about 1 cm, or from about 1 cm to about 0.01 mm, or about 5 mm to about 0.05 mm, or from about 3 mm to about 0.1 mm in their longest direction.
• the torn portion, 36 is the triangular corner which is removed from the pouch, 20, after the tear propagates along line B-B to reach the target tear destination, 34.
• a spout, 18, remains.
• the spout, 18, would have a circumference of two (2) times the spout distance, SD, which is measured from the edge of the seal, 12, to the tear target destination, 34 along the line B-B.
• Fig. 4 also indicates the tear distance, TD, which is the distance as measured from the end of the last cut, to the target tear destination, 34.
• the ratio of the perforation distance, PD, to the tear distance, TD is typically more than 1:10, or from about 1:10 to about 3:1, or from about 1:5 to about 2: 1, or from about 1:3 to about 1:1.
• ratios where the tear distance is too much larger than the perforation distance result in a less controllable tear which may then propagate in too many undesirable directions such as towards the bottom, 24, instead of towards the target tear destination. Conversely, if the tear distance is too much smaller than the perforation distance, then the spout formed may be too small to efficiently dispense the product.
• Fig. 5 is a front view of an embodiment of a sealing arm, 50, of the present invention.
• the sealing arm, 50, and the receiving arm are opposed to each other, and often joined together to form a sealing jaw (not shown).
• the sealing arm, 50 contains a profiled sealing area, 52, for forming the seal (see Fig. 4 at 12").
• the profiled sealing area, 52 further contains a plurality of cut blades, 54, for forming the cuts, 32.
• the profiled sealing area, 52 completely surrounds the cut blades, 54 in the X and Y planes parallel to the sealing arm surface.
• the cut blades, 54 directly correspond to and form the cuts, (see Fig. 4 at 32).
• the shape and number of the cut blades, 54 should correspond to the shape and number of the desired cuts (see Fig. 4 at 32), and thus may also encompass needles, and/or other shapes.
• the cut blades should be of sufficient structural integrity, and durability to both penetrate both layers of the sheet (see Fig. 4, at 30) completely, and also be oriented to easily release the sheet and/or the finished pouch after the seal and perforation is made.
• the cut blade is from about 1 cm to about lO ⁇ , or from about 5 mm to about 20 ⁇ , or from about 2 mm to about 40 ⁇ in height, as measured perpendicularly from the surface of the sealing arm, 50.
• a plurality of sealing jaws may be used such that, for example, sealing jaw may be present to seal the top of the pouch, while a separate sealing jaw may seal the bottom of the pouch.
• the cut blade may be perpendicular to the surface of the sealing arm, or may be angled in the machine direction. Without intending to be limited by theory, it is believed that if the cut blade is perpendicular to the surface of the sealing arm, then at slower autopacking machine speeds the cut blade will more effectively form the cuts.
• a cut blade that is angled in the direction of the package flow may more quickly release the finished pouch, so as to reducing jamming of the autopacking machine caused by a failure of the finished pouch to drop away from the sealing arm.
• the sealing arm, 50 further contains an optional cutting edge, 56, for cutting the pouch, 20, after filling, and also a slit blade, 58, for cutting a slit (see, e.g., Fig. 9 at 38).
• the cutting edge, 56 may be present on either the sealing arm, 50, or the receiving arm (see Fig. 6 at 70), as desired. However placing the cutting edge, 56, and the cut blade, 54, on the same part of the sealing jaw may avoid problems caused by misalignment of the sealing arm, 50, and the receiving arm (see Fig. 6, at 70).
• the cutting edge, 56 may be straight, jagged, curved, etc. as desired.
• the slit blade, 58 is typically located next to the first cut blade, 54, so as to enhance the propagation of the tear in the desired direction.
• the slit blade may be easily replaced by, for example, a notch blade to form a notch, etc.
• the sealing arm or the receiving arm contains a slit blade, a notch blade, or a combination thereof.
• the sealing arm, 50 contains a top seal portion, 60, which forms the seal at the top of the pouch (see 12, at 22 in Fig. 4). On the other side of the cutting edge, 56, from the top seal portion, 60, lies the bottom seal portion, 62, which forms the seal at the bottom (see 12, at 24 in Fig. 2) of the next pouch in the series.
• the sealing arm, 50 also contains optional sealing ridges, 64, which provide textured seals, which may be desirable in some instances to produce, for example, an easier to grip seal, to enhance seal strength, aesthetic reasons, etc.
• the sealing jaw is designed so that it can cut a handle in the seal, 12.
• Fig. 6 is a front view of an embodiment of a receiving arm, 70, of the present invention.
• the receiving arm, 70 complements the sealing arm (Fig. 5 at 50), and is a mirror image thereof, containing a complementary profiled sealing area, 52, which matches with the sealing arm's profiled sealing area, 52 (Fig. 5).
• the receiving arm, 70 contains a cut channel, 74, which is typically a concave indentation or depression in the surface of the receiving arm, 70, that allows the cut blade (Fig. 5 at 54), the slit blade (Fig 5 at 58), the notch blade (not shown), etc. to punch through the sheets and form the respective cuts, slit, notch, etc.
• Fig. 5 is typically a concave indentation or depression in the surface of the receiving arm, 70, that allows the cut blade (Fig. 5 at 54), the slit blade (Fig 5 at 58), the notch blade (not shown), etc. to punch through the sheets and form the respective cuts, slit,
• the cut channel, 74 is surrounded by the profiled sealing area, 52 in the X and Y planes parallel to the receiving arm surface. It is essential that the cut channel be deep enough and aligned correctly so that the closing of the sealing jaw during use does not damage the cut blades.
• the cut blades are releasably attached to the sealing arm, so that when thee cut blades wear out they may be sharpened and/or replaced without having to make an entire new sealing arm.
• the sealing arm, 50, the receiving arm, 70, or both actively interact to form the seal by, for example, heat sealing, ultrasonic sealing, pressure sealing, etc. as desired, and therefore contains the appropriate sealing technology therein or thereupon, such as, for example, a heater, an ultrasonic generator, a pressure clamp, etc.
• the sealing arm and the receiving arm are each independently formed of an appropriate durable material for their uses herein, such as, for example, a metal, a ceramic, a plastic, and a combination thereof.
• a sealing jaw intended for heat sealing should be both strong and conduct heat well, such as copper, brass, steel, or iron, aluminum, etc. since it has a heating element therein, such as a heating coil.
• Impulse and induction sealing methods are useful herein. Based on this disclosure, a sealing arm and a receiving arm according to the present invention may be custom made by various suppliers and/or machine shops around the world.
• the sealing jaw herein may be used to simultaneously seal and form a perforation completely surrounded by the seal on, for example, a pre-formed bag, a pillow bag, and/or a gusset bag.
• the sealing jaw is used on an autopacking machine.
• Fig. 7 shows a front view of an embodiment showing a plurality of perforations, 28, 28', and 28" in parallel lines which help to ensure propagation of the tear towards the target tear destination, 34 approximately located in the top, 22, seal, 12.
• the seal, 12" starts on the side, 26, and completely surrounds the plurality of perforations, 28, 28', and 28".
• the pouch contains at least 1 perforation, or from about 1 to about 10, or form about 1 to about 5, or from about 2 to about 4 perforations.
• the plurality of perforations are aligned to follow each other, such as to be in parallel lines.
• the plurality of perforations may start from different areas, such as from the side, and the top, and be aligned so as to propagate one or more tears that join up in a non-sealed portion of the pouch.
• Fig. 8 shows an alternate embodiment of the pouch, 20, herein having a top, 22, with a larger seal, 12'.
• the top, 22, contains a notch, 16, that leads to a perforation, 28, forming an angle, ⁇ .
• the perforation is completely surrounded by the seal, 12'.
• the perforation propagates a tear through a non-sealed portion such to form a spout, 18, and towards the target tear destination, 34, which in this case is on the side, 26.
• Fig. 9 shows an alternate embodiment of the pouch, 20, herein having a top, 22, with a seal, 12, and a slit, 38, cut into the seal, 12.
• the slit, 38 functions the same as a notch to allow the user to easily initiate propagation of the tear through the perforation, 28, and towards the target tear destination, 34, on the side, 26, to form a spout, 18.
• the perforation, 28, is surrounded by the seal, 12'.
• Fig. 10 shows an alternate embodiment of the pouch, 20, herein having a side, 26, which contains a slit, 38, which allows the user to easily initiate a tear through the perforation, 28. Since the perforation contains an angle, ⁇ , the tear will not continue to the other side (not shown), but will instead angle towards the top, 22, at the target tear destination, 34.
• One skilled in the art may adjust the seal, 12, strength by varying the sealing method, and/or conditions, to allow the tear to completely propagate through the seal, 12, or to allow the seal, 12, to have a higher tearing resistance.
• the invention is combined with additional techniques known in the art, such as a laser-cut, a half-cut, a score line, embossing, etc. and the known methods and machinery therefor.
• a reclosing technology is combined with the invention herein, to allow easy and efficient re-closing of the pouch after opening.
• reclosing technologies are also especially beneficial with larger-sized pouches.
• Typical reclosing technologies are known in the art and include plastic pressure-sensitive zippers, hook and loop fastening systems, zipper systems, adhesive strips and patches, clips and snaps, locking systems, etc.
• EP Patent No. 1 409 366 Bl to Camargo-Parodi, et al. granted on June 21, 2006; and EP Patent Application No. 07119454.2 To Rogers, filed on October 29, 2007.
• Pouches according to Fig. 2, Fig. 4, and Fig. 7, are formed on an autopacking machine from a sheet using the sealing jaw of Figs 5-6.
• the autopacking machine creates all seals by heating to create thermal bonding between the separate sheets.
• the sheet is a three layer laminate of the film materials polyethylene terepthalate, a metallic film (like MYLAR®), and polyethylene.
• the sheet is provided on a roll which feeds into the autopacking machine and is stretched onto an area where the tube is formed by sealing a line in the machine direction.
• the tube has a leading edge which is sealed to form a first seal using the sealing jaws according to Figs. 5-6.
• a predetermined weight (2 kg) of laundry detergent is filled into and flows down the tube and the tube is sealed using the sealing jaws of Figs. 5-6 to form a filled pillow bag containing 2 kg of granular laundry detergent. The process then repeats itself for the next pouch.
• the pouch formed above substantially corresponds to the pouch of Fig. 2, except that the notch is replaced with a slit.
• the seal, 12' is the same width on each side of the perforation, 28, as the seal, 12, on the top of the bag. When tested by a mechanical tester, the seal around the perforation does not decrease the bursting strength of the pouch at all, as compared to an identical bag which lacks the perforation.
• the pouch is easily opened via hand tearing to form a spout from which to easily pour the laundry detergent.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bag Frames (AREA)
• Packages (AREA)
• Containers And Plastic Fillers For Packaging (AREA)

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• 2009
  • 2009-03-06 WO PCT/IB2009/050950 patent/WO2009115939A1/en active Application Filing
  • 2009-03-06 MX MX2010010200A patent/MX2010010200A/es not_active Application Discontinuation
  • 2009-03-06 CA CA2715820A patent/CA2715820A1/en not_active Abandoned
  • 2009-03-06 RU RU2010138664/12A patent/RU2010138664A/ru not_active Application Discontinuation
  • 2009-03-06 CN CN2009801097641A patent/CN101977825A/zh active Pending
  • 2009-03-06 EP EP09721781A patent/EP2259986A1/en not_active Withdrawn
  • 2009-03-06 BR BRPI0908974-8A patent/BRPI0908974A2/pt not_active IP Right Cessation
  • 2009-03-18 AR ARP090100980A patent/AR070989A1/es not_active Application Discontinuation
  • 2009-03-19 US US12/407,370 patent/US20090238502A1/en not_active Abandoned
• 2010
  • 2010-08-23 ZA ZA2010/05990A patent/ZA201005990B/en unknown

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