WO2009129135A1 - Sac de stockage flexible avec sorties d'air entre deux fermetures à glissière - Google Patents

Sac de stockage flexible avec sorties d'air entre deux fermetures à glissière Download PDF

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Publication number
WO2009129135A1
WO2009129135A1 PCT/US2009/040176 US2009040176W WO2009129135A1 WO 2009129135 A1 WO2009129135 A1 WO 2009129135A1 US 2009040176 W US2009040176 W US 2009040176W WO 2009129135 A1 WO2009129135 A1 WO 2009129135A1
Authority
WO
WIPO (PCT)
Prior art keywords
reclosable
receptacle
bag
structures
passageway
Prior art date
Application number
PCT/US2009/040176
Other languages
English (en)
Inventor
Victor Matias
Original Assignee
Illinois Tool Works Inc.
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
Application filed by Illinois Tool Works Inc. filed Critical Illinois Tool Works Inc.
Publication of WO2009129135A1 publication Critical patent/WO2009129135A1/fr

Links

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2566—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor using two or more independently operable slide fasteners
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3261—Flexible containers having several compartments
    • B65D81/3266—Flexible containers having several compartments separated by a common rupturable seal, a clip or other removable fastening device
    • 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
    • B65D2205/00—Venting means
    • B65D2205/02—Venting holes

Definitions

  • This invention relates to a flexible bag for use in the microwaving of cookable items, and more specifically pertains to the controlled venting of any pressure or steam generated within the bag during microwaving to assure that such is effectively released to the atmosphere, preferably without substantially opening of the structured bag, for maintaining the freshly cooked and heated texture for the food product, until the bag is physically opened for consumption or use by the consumer.
  • reclosable bags having press-to-close or slide-to- close reclosable feature were designed for food storage applications such as non-refrigerated and refrigerated storage. These bag products were manufactured from a combination of polyethylene resins with a reclosable feature. More recently, such reclosable bag products have been designed for high-temperature applications; for example, they are microwavable.
  • the inner zipper is designed to open when the pressure inside the bag increases a sufficient amount during cooking of the bag contents.
  • steam from inside the bag can then escape through the vent or vents while the outer zipper remains closed.
  • the bag has a bottom gusset so that it can stand upright in a microwave oven.
  • the bag can be removed from the oven and the outer zipper can be opened, allowing the user to access the bag contents.
  • the user can simply close both zippers and then place the resealed bag inside a refrigerator. The remaining contents of the bag are not exposed to ambient air via the vent or vents once the inner zipper has been resealed.
  • the bag can again be placed in a microwave oven for re-use.
  • One aspect of the invention is a bag comprising a receptacle and first and second reclosable structures installed inside the receptacle, the first reclosable structure bounding an interior volume for product inside the receptacle when the first reclosable structure is in a fully closed state, and at least portions of the first and second reclosable structures bounding a passageway inside the receptacle when the first and second reclosable structures are in fully closed states, the receptacle comprising a vent that is in flow communication with the interior volume via the passageway when both the vent and the first reclosable structure are in at least partially open states, wherein if, while the first and second reclosable structures are in fully closed states, the pressure inside the interior volume is increased sufficiently, the first reclosable structure will open at least partly to allow gas from the interior volume to escape into the passageway while the second reclosable structure remains in a fully closed state.
  • a bag comprising a receptacle and first, second and third reclosable structures installed inside the receptacle, the first reclosable structure bounding a first interior volume inside the receptacle when the first reclosable structure is in a fully closed state, the first and second reclosable structure bounding a second interior volume inside the receptacle when the first and second reclosable structures are in fully closed states, and at least portions of the second and third reclosable structures bounding a passageway inside the receptacle when the second and third reclosable structures are in fully closed states, the receptacle comprising a vent that is in flow communication with the second interior volume via the passageway when both the vent and the second reclosable structure are in at least partially open states, wherein if, while the first reclosable structure is in a fully closed state, the pressure inside the first interior volume is increased sufficiently, the first reclosable structure will open at least partly to allow mixing of the contents of the first and second interior volumes, and wherein if, while the first rec
  • a further aspect of the invention is a bag comprising a receptacle and first and second reclosable structures installed inside and across a mouth of the receptacle, the first and second reclosable structures being parallel and spaced apart from each other, and at least portions of the first and second reclosable structures bounding a passageway within the mouth of the receptacle when the first and second reclosable structures are in fully closed states, the receptacle comprising a vent that is in flow communication with an interior volume of the receptacle via the passageway when both the vent and the first reclosable structure are in at least partially open states, wherein if, while the first and second reclosable structures are in fully closed states, the pressure inside the interior volume is increased sufficiently, the first reclosable structure will open at least partly to allow gas from the interior volume to escape into the passageway while the second reclosable structure remains in a fully closed state.
  • FIG. 1 is a drawing showing an isometric view of a vented reclosable storage bag in accordance with one embodiment.
  • FIG. 2 is a drawing showing a plan view of the storage bag depicted in FIG. 1.
  • FIGS. 3-6 are drawings showing sectional view of vented reclosable storage bags in accordance with alternative embodiments.
  • FIG. 7 is a drawing showing a plan view of a vented reclosable storage bag having serpentine passageways between a pair of zippers.
  • FIG. 8 is a drawing showing a plan view of a vented reclosable storage bag having multiple product compartments.
  • Each reclosable bag is made of flexible material, such as polypropylene , plastic lamination films or other high-melting- temperature flexible material.
  • Each reclosable bag has a pair of reclosable structures, e.g., a pair of plastic zippers, each zipper comprising a pair of zipper strips having mutually interlockable closure profiles.
  • the reclosable structures may be arranged in mutually parallel and spaced-apart relationship with at least one passageway therebetween.
  • each reclosable bag has one or more vents for pressure relief. The vents are located between the reclosable structures, preferably at or near the side edges of the storage bag.
  • Each vent may take the form of a slit or a small opening.
  • the vent can also be made to be forced open during initial exposure to pressure.
  • the storage bag may be constructed with a bottom gusset that enables the bag to stand upright inside a microwave oven.
  • the plastic film used to construct the bag may be thin for single-use bags or thick for multiple-use bags.
  • the inner reclosable structure is designed to partially open when the pressure inside the bag increases sufficiently (e.g., to a pressure in the range greater than 1 and less than 4 pounds per square inch) during cooking.
  • the bag and its contents may be placed inside a microwave oven, which oven is then set to cook the bag contents.
  • the pressure buildup inside the bag is relieved by the partial opening of the inner reclosable structure and the release of steam through the one or more vents formed in the reclosable bag.
  • the pressure relief prevents the bag from bursting or otherwise having its integrity compromised.
  • the outer reclosable structure remains closed during cooking. After cooking, the outer reclosable structure can be opened and a desired portion of the cooked contents can be removed by the consumer. After cooling, the inner reclosable structure can be resealed and the cooked contents that remain inside the intact bag can be stored for future use without the need to transfer the remaining bag contents to some other airtight container.
  • FIG. 1 depicts one embodiment of a high-temperature vented reclosable storage bag suitable for use in cooking food.
  • the bag shown in FIG. 1 depicts one embodiment of a high-temperature vented reclosable storage bag suitable for use in cooking food. The bag shown in FIG.
  • a receptacle 2 made of flexible material, such as polypropylene film, plastic lamination film, other higher-melting-temperature material, or a combination of two or more of the foregoing types of flexible material.
  • a web of flexible high-temperature is folded and then heat sealed (or ultrasonically welded) in marginal regions adjacent the side edges to form a front panel 4, a rear panel 6 and a bottom gusset 8,
  • the receptacle 2 has an interior volume
  • each zipper comprises a string (i.e., flangeless) zipper consisting of two zipper strips having mutually interlockable closure profiles, respectively. These zipper strips are joined to the bag walls by heat sealing or ultrasonic welding and extend across the mouth of the receptacle. Preferably they are mutually parallel and spaced apart.
  • the upper portions of the front and rear panels of the receptacle are provided with respective pluralities of mutually parallel gripping ribs 18 (the ribs on the rear panel are not visible in FIG. 1) which facilitate gripping of those upper portions during opening of the outer zipper 10 by the user.
  • the space between the zippers 10 and 12 may include a passageway 11 that allows flow communication between a pair of vents 20 and
  • the vent 20 is formed by confronting marginal portions of the front and rear panels 4 and 6 that are disposed adjacent the left-hand side edge of the receptacle 2; the vent 20' is formed by confronting marginal portions of the front and rear panels 4 and 6 that are disposed adjacent the right-hand side edge of the receptacle 2.
  • the vents 20 and 20' may be closed until such time that the inner zipper 12 partially opens, allowing steam to flow into the passageway 11 and then out through the vents.
  • 20' may already be open prior to the escape of steam into the passageway.
  • FIG. 2 shows a plan view of the storage bag depicted in FIG. 1.
  • the side seals 22 and 24 are indicated by hatching.
  • Above the horizontal dashed line (which indicates the bottom gusset 8), respective confronting marginal portions of the front and rear panels of the receptacle are sealed together except where the ends of the zippers 10 and 12 intervene and where the vents 20 and 20' are located.
  • vents 20 and 20' are formed by confronting marginal portions of the front and rear panels of the receptacle that are not sealed together.
  • the vents can be formed by providing gaps in the heated side sealing bars typically used to form side seals 22 and 24.
  • FIG. 2 shows a vented reclosable storage that is empty and flat.
  • FIG. 3 is a sectional view of a vented reclosable storage bag having a bottom gusset in accordance with an alternative embodiment.
  • the bottom gusset 8 comprises two gusset panels 26 and 28 formed by folding a web. As previously described, in the side seal regions the marginal portions of the gusset panels 26 and 28 and the front and rear panels 4 and 6 of the receptacle are all joined together by heat sealing.
  • the embodiment shown in FIG. 3 includes three zippers.
  • the outer zipper comprises a female element 30 and a double hook element 32 that interlocks with the female element 30 in a conventional manner to form a closure.
  • the intermediate zipper comprises a female element 34 and a monohook element 36 that interlocks with the female element 34 in a conventional manner to form a closure.
  • the inner zipper comprises a female element 38 and a monohook element 40 that interlocks with the female element 38 in a conventional manner to form a closure.
  • the passageway 11 is disposed between the female elements 34 and 38.
  • a vent 42 is formed in the front panel 4 and a vent 42' is formed in the rear panel 6.
  • Each of these vents may be a slit or an opening.
  • the vents 42 and 42' allow the escape of steam from the interior volume of the receptacle when the inner zipper is partially open (not shown), which steam flows through the opening in the inner zipper, into the passageway 11 , and then out the vents 42 and 42'.
  • the vents can be placed at the side edges in the manner previously described with reference to FIG. 1.
  • FIG. 4 is a sectional view of a vented reclosable storage bag in accordance with a further embodiment.
  • the receptacle is shown as not having a bottom gusset, but a person skilled in the art will readily appreciate that a bottom gusset could be provided.
  • the embodiment shown in FIG. 4 includes two zippers.
  • the outer zipper comprises a female element 44 and a double hook element 46 that interlocks with the female element 44 in a conventional manner to form a closure.
  • the inner zipper comprises a female element 48 and a double hook element 50 that interlocks with the female element 48 in a conventional manner to form a closure.
  • the passageway 11 is disposed between the female elements 44 and 48.
  • a vent 42 is formed in the front panel 4 and a vent 42' is formed in the rear panel 6.
  • Each of these vents may be a slit or an opening.
  • the vents 42 and 42' allow the escape of steam from the interior volume of the receptacle when the inner zipper is partially open (not shown), which steam flows through the opening in the inner zipper, into the passageway 11 , and then out the vents 42 and 42'.
  • the vents can be placed at the side edges in the manner previously described with reference to FIG. 1.
  • FIG. 5 is a sectional view of a vented reclosable storage bag in accordance with yet another embodiment. Again the receptacle is shown as not having a bottom gusset, but optionally a bottom gusset could be provided.
  • the embodiment shown in FIG. 4 includes two zippers.
  • the outer zipper comprises a female element 44 and a double hook element 46 that interlocks with the female element 44 in a conventional manner to form a closure.
  • the inner zipper comprises a female element 52 having a detent 78, a double hook element 54 that interlocks with the female element 52, and a backup element 56.
  • the detent 78 bears against the backup element 56 when the female element 52 starts to open, thereby providing a resistance to opening.
  • vent 42 is formed in the front panel 4 and a vent 42' is formed in the rear panel 6.
  • Each of these vents may be a slit or an opening.
  • the vents 42 and 42' allow the escape of steam from the interior volume of the receptacle when the inner zipper is partially open (not shown), which steam flows through the opening in the inner zipper, into the passageway 11 , and then out the vents 42 and 42'.
  • the vents can be placed at the side edges in the manner previously described with reference to FIG. 1.
  • FIG. 6 is a sectional view of a vented reclosable storage bag in accordance with yet another embodiment.
  • This embodiment is similar to the embodiment shown in FIG. 4, with the difference that instead of two string zippers, a double zipper with common base strips 74 and 76 is installed in the mouth of the receptacle.
  • the outer zipper comprises a female element 44 and a double hook element 46 that interlocks with the female element 44 in a conventional manner to form a closure.
  • the inner zipper comprises a female element 48 and a double hook element 50 that interlocks with the female element 48 in a conventional manner to form a closure.
  • the passageway 11 is disposed between the female elements 44 and 48 and between the common base strips 74 and 76.
  • a vent 42 is formed in the joined portions of the front panel 4 and common base strip 74, and a vent 42' is formed in the joined portions of the rear panel 6 and common base strip 76.
  • Each of these vents may be a slit or an opening.
  • the vents can be formed by confronting marginal portions of the common base strips (i.e., marginal portions disposed between the closure profiles) that are not sealed together in the side seal regions.
  • FIG. 7 A vented reclosable storage bag in accordance with a further embodiment is shown in FIG. 7.
  • the zippers 10 and 12 are mutually parallel and spaced apart to form a passageway 11 that communicates with a pair of vents 20 and 20' located between the zippers and at the side edges.
  • the distance between the zippers can be varied to allow precise control of steam vent size and the rate at which steam can escape from the bag.
  • means are provided to direct the flow of steam along serpentine paths 64 and 70 before exiting via the vents 20 and 20', thereby better controlling the pressure inside the receptacle 2.
  • the serpentine path 64 is formed by heat sealing the front and rear panels together in rectangular areas 60 and 62; the serpentine path 70 is formed by heat sealing the front and rear panels together in rectangular areas 66 and 68.
  • a central portion of the inner zipper 12 will open, allowing steam to escape into passageway 11.
  • the pressure differential between the inside and outside of the bag will cause some steam to flow toward vent 20 via serpentine path 64 and other steam to flow toward vent 20' via serpentine path 70.
  • a vented reclosable storage bag may be provided with multiple compartments that open at different times during cooking based on what is in each compartment, the zipper designs, and the compartment sizes. For example, one could have a little water and brown sugar in a top compartment and carrots in a bottom compartment.
  • a reclosable bag having a bottom compartment 80 and a top compartment 82 is shown in FIG. 8. The top and bottom compartments are separated by a seal 72 that opens when a first pressure level in the top or bottom compartment is reached. Seal 72 may be a reclosable structure such as a plastic zipper.
  • the top compartment has a plastic zipper 12 that opens when a second pressure level is reached, the second pressure level being higher than the first pressure level.
  • the seal 72 between the top and bottom compartments would open first, allowing the water and brown sugar in the top compartment 82 to fall into the bottom compartment 80 and be mixed with the carrots during cooking.
  • the internal pressure increases until the second pressure level is reached, at which time the zipper 12 would partially open, allowing steam from the top compartment 82 to escape into the passageway 11 and then out vents 20 and 20 in the manner previously described.

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

Abstract

L'invention porte sur un sac (1) comprenant un réceptacle (2) et des première et seconde structures refermables (10, 12) installées à l'intérieur et à travers une embouchure du réceptacle, les première et seconde structures refermables étant parallèles et espacées l'une de l'autre. Au moins des parties des première et seconde structures refermables relient un passage (11) à l'intérieur de l'embouchure du réceptacle lorsque les première et seconde structures refermables sont dans des états entièrement fermés. Le réceptacle comprend une sortie d'air (20, 20') qui est en communication d'écoulement avec un volume intérieur du réceptacle par l'intermédiaire du passage lorsqu'à la fois la sortie d'air et la première structure refermable sont dans des états au moins partiellement ouverts. Si, tandis que les première et seconde structures refermables sont dans des états entièrement fermés, la pression à l'intérieur du volume intérieur est augmentée de manière suffisante, la première structure refermable s'ouvrira au moins partiellement pour permettre à un gaz provenant du volume intérieur de s'échapper à l'intérieur du passage tandis que la seconde structure refermable reste dans un état entièrement fermé.
PCT/US2009/040176 2008-04-14 2009-04-10 Sac de stockage flexible avec sorties d'air entre deux fermetures à glissière WO2009129135A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US4454108P 2008-04-14 2008-04-14
US61/044,541 2008-04-14
US12/420,195 2009-04-08
US12/420,195 US20090257685A1 (en) 2008-04-14 2009-04-08 Flexible storage bag with vent between two zipper

Publications (1)

Publication Number Publication Date
WO2009129135A1 true WO2009129135A1 (fr) 2009-10-22

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Application Number Title Priority Date Filing Date
PCT/US2009/040176 WO2009129135A1 (fr) 2008-04-14 2009-04-10 Sac de stockage flexible avec sorties d'air entre deux fermetures à glissière

Country Status (2)

Country Link
US (1) US20090257685A1 (fr)
WO (1) WO2009129135A1 (fr)

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