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US20040008908A1 - Roll top bag constructions - Google Patents

Roll top bag constructions Download PDF

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Publication number
US20040008908A1
US20040008908A1 US10413413 US41341303A US2004008908A1 US 20040008908 A1 US20040008908 A1 US 20040008908A1 US 10413413 US10413413 US 10413413 US 41341303 A US41341303 A US 41341303A US 2004008908 A1 US2004008908 A1 US 2004008908A1
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Prior art keywords
bag
fastener
top
face
closure
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Legal status (The legal status 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 status listed.)
Abandoned
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US10413413
Inventor
William Shepard
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Velcro Industries BV
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Velcro Industries BV
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/24End- or aperture-closing arrangements or devices using self-locking integral or attached closure elements, e.g. flaps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2313/00Connecting or fastening means
    • B65D2313/02Connecting or fastening means of hook-and-loop type

Abstract

A gusseted bag of disposable packaging material has a roll-top closure comprising two releasably engageable fastener components. Each fastener component comprises a plastic base layer carrying either hook or loop elements. In some cases, one component is secured to one face of a rollable top of the bag, and the other component is carried on a flexible flap secured to a lower portion of an opposite face of the bag. In another embodiment, one fastener component extends in a strip from an upper edge of the bag down one face of the bag, and the other fastener component extends in a strip from an upper edge of the bag down an opposite face, such that when the top of the bag is folded downward, one fastener component will engage the other fastener component to hold the top closed.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • [0001]
    This application is a continuation of and claims priority, under 35 U.S.C. §120, to PCT/US01/31525, filed Oct. 10, 2001, which claims priority to U.S. Application Serial No. 60/240,496, filed on Oct. 13, 2000.
  • TECHNICAL FIELD
  • [0002]
    This invention relates generally to the field of bags adapted to be closed by folding or rolling down their upper ends, such as for the packaging of granular material and other consumable items. The invention is particularly related to reclosable surface closures for gusseted roll-top bags.
  • BACKGROUND
  • [0003]
    A conventional roll top bag closure employs one surface fastener element (e.g., a section of loop material) at the top edge of the front external face of the bag, and a matable fastener element (e.g., a width of hooking material) spaced approximately two widths of the fastener element down the back face of the bag. To secure the top of the bag in a rolled state, the top is folded down toward the back bag face, the width of the fastener element, and then rolled over again to engage the matable surfaces of the fastener elements. Once so mated, the fastener elements are loaded primarily in peel (i.e., the separation load is generally normal to the plane of the fastener elements), due to the tendency of the rolled top to unroll.
  • [0004]
    It has been realized that hook and loop closures, as well as some adhesive closures, are stronger when loaded in shear (i.e., when resisting loads applied generally parallel to their engagement plane) than in peel. One improvement in roll top bag constriction was introduced by Rinicker in U.S. Pat. No. 3,655,118, in an attempt to place the hook and loop engagement under shear by facing the lower surface fastener element toward the bag face on a flexible flap. To secure the Rinicker bag closure, one would roll the bag top down and, lift the flap, and insert the rolled top between the bag face and the flap to engage the hooks and loops.
  • [0005]
    Improved closure constructions are desired, especially ones that are readily accommodated by modern bag making and filling equipment, are easy to use, and are designed for compatibility with various bag constructions, such as gusseted roll top bags for such commodities as coffee and the like.
  • SUMMARY
  • [0006]
    In one aspect the invention relates to a gusseted bag of disposable packaging material having a roll-top closure defined during use by two releasably engageable fastener components, one component being associated with an upper edge of a rollable top of the bag, and the other component being carried on a flexible flap secured to a lower portion of a face of the bag. Each of the components is in the form of a plastic base layer carrying respective hook or loop elements.
  • [0007]
    In one preferred construction, the flexible flap is secured to the face of the bag along the upper edge of the flap, with its fastener component facing away from the face of the bag and disposed below the attachment of the flap to the bag face. The top of the bag is folded down toward the flap, which is then folded upward to engage the two fastener components and secure the folded top between the bag face and the flap.
  • [0008]
    In another preferred construction in which the flexible flap is secured to the face of the bag along the upper edge of the flap, with its fastener component facing away from the face of the bag and disposed below the attachment of the flap to the bag face, the top of the bag is folded down over the flap to engage the two fastener components. When the folded top is released and tends to unfold, the flap is bent upward to follow the unfolding top and redirect at least a significant portion of the peel load applied to the fastener into a shear load.
  • [0009]
    In certain preferred embodiments the packaging material from which the gusseted bag is formed has an outer layer of thermally weldable plastic, in the form of a film or coating, and the plastic base layers of the plastic components are of a compatible thermally weldable material. In many of the preferred embodiments the plastic of each of the layers is of substantially the same molecular type. In one case each comprises polyethylene, in another case each comprises polypropylene, in another each comprises copolymers of EVA and polyethylene and in another case each comprises polyester.
  • [0010]
    According to another group of preferred embodiments, the outer surface of the gusseted bag is defined by paper, and the fastener components carry upon them an adhesive layer, preferably in many embodiments pressure-sensitive adhesive, or in other cases heat-activatable adhesive, and appropriate pressure and/or heat are applied during manufacture to secure these components to the bag. In a particular example the outer surface of the bag is paper and adhesive (e.g., moisture-sensitive or gum adhesive) is pre-applied to the base layers of the closure components.
  • [0011]
    In preferred embodiments of the invention, the loop material is a non-woven material (e.g., formed of needled fibers), such as is available from Velcro USA of Manchester, N.H. under the trademark ASPEN. Various detailed features of this preferred loop material can be found in co-pending U.S. Ser. No. 09/262,159, the contents of which are incorporated herein by reference as if fully set forth.
  • [0012]
    The male fastener elements (e.g., hooks) are preferably formed integrally (e.g., molded) with the plastic base layer of the fastener component.
  • [0013]
    In certain preferred embodiments packaging material, prior to being formed into gusseted bags, has pre-applied to it one or both of the two fastener components.
  • [0014]
    In some preferred embodiments the two fastener components are introduced to the bag making process as a single unit (e.g., as parallel portions of a wide closure strip), which is then split into the two components and applied to the packaging material.
  • [0015]
    In another preferred embodiment, a closure strip that defines both of the components has a dividing tear strip between them, the components being secured to the bag as a unit, the tear strip adapted to be removed by the purchaser to divide the unit into the two separate components.
  • [0016]
    In some embodiments, the flexible flap is secured to the face of the bag along a lower edge of the flap, with its fastener component facing toward the face of the bag, such that the fastener components are engageable by moving the flap away from the face of the bag, folding the top of the bag down between the flap and the face of the bag, and then moving the flap back toward the face of the bag to engage the fastener components and secure the folded top between the face of the bag and the flap.
  • [0017]
    According to another aspect of the invention, a bag of disposable packaging material has a closure comprising two releasably engageable fastener components, wherein each fastener component comprises a plastic base layer carrying either hook or loop elements. One fastener component extends in a strip from an upper edge of a foldable top of the bag down one face of the bag, and the other fastener component extends in a strip from an upper edge of the foldable top of the bag down an opposite face of the bag, such that when the top of the bag is folded downward, one fastener component will engage the other fastener component to hold the top closed.
  • [0018]
    Preferably, one or both of the fastener components extends from the top of the bag to a gusseted bottom of the bag. One of the fastener components covers a fin seal of the bag in some cases.
  • [0019]
    In some embodiments, the bag has gusseted sides formed between the faces along which the fastener components extend.
  • [0020]
    Various embodiments may also contain features described in U.S. Pat. No. 6,202,260, and PCT Serial Number US99/26261, published May 18, 2000 as WO 00/27721, the entire contents of both of which are hereby incorporated by reference as if fully set forth.
  • [0021]
    According to another aspect of the invention, a method is provided for forming a bag of packaging material having a roll-top closure comprising two releasably engageable fastener components, each fastener component comprising a plastic base layer carrying either hook or loop elements. The method includes forming a roll-top bag of the packaging material, with the first fastener component disposed on one face of a foldable top of the bag, and a flap extending from a lower portion of an opposite face of the bag and carrying the second fastener component positioned to be engageable with the first component when the top of the bag is rolled downward.
  • [0022]
    In some embodiments the method includes, before forming the roll-top bag, pre-applying the first fastener component to the packaging material, and securing the flap to the packaging material, the flap carrying the second fastener component.
  • [0023]
    In some cases, the method includes introducing the two fastener components to a bag making process as parallel portions of a unitary closure strip, splitting the closure strip into the two fastener components, and then applying the fastener components to the packaging material.
  • [0024]
    The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
  • DESCRIPTION OF DRAWINGS
  • [0025]
    [0025]FIG. 1 is a perspective view of a roll top bag.
  • [0026]
    [0026]FIG. 2A is an end view of the roll top bag of FIG. 1, with the top rolled and held down to engage the surface fastener components.
  • [0027]
    [0027]FIG. 2B shows the bag of FIG. 2A after the rolled top has been released.
  • [0028]
    [0028]FIG. 3 is a cross-sectional view, taken along line 3-3 in FIG. 2B.
  • [0029]
    [0029]FIG. 4 is an enlarged side view of the top portion of the bag, showing the placement of the surface fastener components.
  • [0030]
    [0030]FIG. 5 is a perspective view of a second roll top bag.
  • [0031]
    [0031]FIG. 6 is a perspective view of the bag of FIG. 5, in its unfilled state.
  • [0032]
    [0032]FIGS. 7A and 7B are alternate cross-sectional views, taken along line 7-7 in FIG. 6.
  • [0033]
    FIGS. 8A-8C sequentially illustrate the opening and reclosing of a third roll top bag construction.
  • [0034]
    [0034]FIG. 9 is a transverse cross-sectional view of a first, one-piece closure strip, and FIG. 9A shows such a closure strip as installed on a bag.
  • [0035]
    [0035]FIG. 10 is a transverse cross-sectional view of a first, one-piece closure strip, and FIG. 10A shows such a closure strip as installed on a bag.
  • [0036]
    FIGS. 11A-11C show bags with three different top fold multiples.
  • [0037]
    Like reference symbols in the various drawings indicate like elements.
  • DETAILED DESCRIPTION
  • [0038]
    Referring to FIG. 1, gusseted bag 10 is formed to have a generally flat bottom 12 to stand up on a horizontal support surface (not shown), as is common in the packaging of coffees, for example. The body 14 of the bag is formed of plastic film, such as a laminate of polyethylene (on the inner surface of the bag, to promote freshness) and polyester (on the outer surface of the bag for durability). A transverse end seal 16 and a vertical fin seal 18 help to form the film into a pouch as shown, having an inner cavity as shown in cross-section in FIG. 3.
  • [0039]
    Still referring to FIG. 1, bag 10 has two surface fastener components for releasably retaining the top of the bag in a closed, rolled condition for storage. A male surface fastener 20 is attached to the rear face 22 of the bag along the upper edge of fastener 20, with the lower majority of the area of fastener 20 extending freely from the bag. Fastener 20 is preferably in the form of a width of plastic resin molded to have an array of integrally-formed male, loop-engageable fastener elements extending from its broad outer surface. Such fasteners may be formed by the process described in Fisher in U.S. Pat. No. 4,794,028, hereby incorporated by reference. In this embodiment, the faster is applied with its longitudinal forming direction extending across the bag face, with hook-shaped fastener elements that are directed across the width of the bag. However, other shapes of male fastener elements may be employed, or hook shapes that face upward and/or downward as applied to the bag. Preferably, fastener 20 is of a resin compatible with the outer surface of bag 10, such that the upper edge of the fastener may be permanently attached by heat-staking, for example. Other suitable attachment means include pressure-sensitive adhesive (PSA) or moisture-sensitive adhesive (MSA), such as gum coatings.
  • [0040]
    A female surface fastener 24 is applied across the front face 26 of bag 10, toward the top of the bag. Fastener 24 carries a field of engageable loops or fibers for mating with the fastener elements of fastener 20, and is permanently secured to the bag film at least along its two long edges (e.g., by heat-sealing), preferably across its entire back face (e.g., by heat-sealing or adhesives). The field of fibers exposed on the outer surface of fastener 24 may be, for example, the ASPEN material referred to above. As shown, fasteners 20 and 24 extend across substantially the full width of bag 10.
  • [0041]
    To close bag 10, the top of the bag is first folded above the upper edge of loop fastener 24, as indicated by arrow A. The bag top is folded over again, this time below the lower edge of fastener 24, as indicated by arrow B. The bag top is then folded a third time, this time just above the upper, attached edge of hook fastener 20, to engage the exposed, mating surface of fasteners 20 and 24 (as shown in FIG. 2A). Were the lower edge of fastener 20 attached to the bag face, releasing the rolled bag top in this position would place a normal (i.e., peel) separation load upon the surface fasteners due to the resiliency of the rolled bag top and its associated tendency to unroll. However, because the lower portion of fastener 20 is unattached, the resiliency of the rolled bag top pulls fastener 20 upward, bending it about its attached upper edge, until it is directed upward, on the outer surface of the rolled bag top as shown in FIG. 2B. I have round that with thin, flexible hook substrates, fastener 20 can be pulled up to an orientation of 10 to 30 degrees from vertical. Further tendency of the rolled bag top to unwind places a load between the surface fasteners that is predominantly in shear (i.e., parallel to their engagement plane), a loading mode known to be more readily resisted by surface fasteners than peel. As FIGS. 2A and 2B illustrate, the lowest fold of the rolled top almost completely unfolds after the rolled top is released and allowed to deflect the lower fastener 20 up into a shear loading orientation. It should be understood that other folding multiples are envisioned for this general bag closure construction, with the last fold of any such multiple at least partially sacrificed to pull the closure into a shear loading orientation. FIGS. 11A-11C, for example, show various folding multiples. The more folds, the more sealed the closure.
  • [0042]
    [0042]FIG. 4 shows a preferred spacing of fasteners 20 and 24 to enable the folding described above. Loop fastener 24 has a width “w” of about ½ inch (12.5 millimeters), and is spaced down from the upper edge 28 of the bag a distance equal to its width minus a fraction “x” of about ⅛ inch (3.2 millimeters). Hook fastener 20 is attached to the bag face a distance down from loop fastener 24 equal to the width “w” of fastener 24 plus fraction “x”. These fraction adjustments aid in the rolling of the bag top, by accounting for the fold thickness. The array of fastener elements carried upon fastener 20 is also of about width “w”.
  • [0043]
    [0043]FIG. 5 shows a bag 20 with a roll top closure that is functional with the top folded over any one of several numbers of times. Such a bag construction is particularly useful, for example, for applications in which the user desires to incrementally collapse the bag as its contents are depleted. Bags for charcoal briquettes, for example, are one such application. A strip of loop fastener 24 is carried vertically all the way up the front face 32 of the bag, and a matable strip of hook fastener (not shown in this view) extends in parallel fashion up the rear face 34 of the bag. When the bag top is folded over one or more times, its two opposite faces, and the respective fasteners they carry, engage to form a releasable fastening. In this embodiment, the hook and loop strips are both permanently attached to the bag film along their entire length, which also corresponds to the entire length of the bag. It will be understood that this particular construction does not obtain the advantages of predominant shear loading, but does obtain many of the other advantages noted above.
  • [0044]
    [0044]FIG. 6 shows the same bag 30 empty and open, as before filling, for example. The loop component 24 is shown in dashed outline only, to illustrate that the longitudinal fin seal 18 of the bag extends up its front face and is covered by the loop component for an aesthetically pleasing appearance. The loop component 24 may be attached to the bag film on both sides of the longitudinal fin seal with adhesive 36, as shown in FIG. 7A, or may have one edge aligned with the free edge of the fin seal, as shown in FIG. 7B. Both approaches have distinct advantages, as the fasteners as shown in FIG. 7A can be applied to the bag after formation of the fin seal, and even after completion of the form and fill process, if desired. On the other hand, the fasteners as shown in FIG. 7B, which are heat-staked or welded directly to the bag film, may be applied to the sheet-form bag film in advance of forming and filling the bags, with the fastener strips introduced directly to the bag forming equipment as continuous lengths, or applied to a respective edge and middle region of the bag film as it is spooled from a roll, to name two preferred examples.
  • [0045]
    FIGS. 8A-8C illustrate a roll top bag construction that combines the advantages of shear loading and variable adjustability. A strip of loop component 24 is permanently attached to the front face of bag 40, similar to the arrangement of the loop strip on the bag of FIG. 5. On the back face of the bag, however, hook component 20 is attached only at its upper and lower ends to the bag, with its array of hook elements facing toward the bag film along its entire length. As shown in FIG. 5A, the upper edge of filled bag 40 is sealed to form a pouch suitable for perishable goods, with the upper seal of the bag forming a tear strip 42 to be torn from the bag upon its initial opening. Hook component 20 is attached at its upper end only to tear strip 42, and contains an upper frangible joint (e.g., a transverse score line or tear notch, not shown) adjacent the tear strip, such that when the tear strip is torn away, the upper end of hook component 20 is freed from the bag as shown in FIG. 8B. To reclose the bag, the top is rolled up as much as desired, then the extended hook strip 20 is wrapped over the top of the bag (as shown in FIG. 8C), engaging the loop strip 24 over a wide area in predominantly shear loading.
  • [0046]
    The two fasteners may also be provided as part of a unitary strip. For example, FIG. 9 shows a closure strip 50 that has a unitary resin substrate 52 from which both a tear rib 54 and an array of integrally molded fastener elements 56 extend in parallel, longitudinally continuous form. Loop material 58 is also carried on the substrate, with fibers of the loop material embedded in and secured by resin of the substrate. Methods of forming such unitary closure strips are described more fully in U.S. Pat. No. 6,202,260. Parallel, continuous bands of adhesive 60 are provided on the back side of the closure strip for securing the strip to a bag, as shown in FIG. 9A, for example. The narrow band of adhesive 60 on the hook side of rib 54 attaches the closure strip to the face of the bag, and the wider band of adhesive 60 on the loop side of the rib secures the strip to the rolled top of the bag after filling. With the closure strip so applied to the bag, closure strip 50 provides desirable tamper evidence, as the bag cannot be opened without damaging or tearing the closure strip. To open the bag, tear rib 54 is grasped and pulled across the face of the bag and discarded, severing the substrate 52 of the closure into two parallel portions, each carrying an associated one of the matable fasteners. Substrate 52 is provided with molded tear channels (not shown) on either side of rib 54 to assist in controlled opening. The bag can then be reclosed by rolling the top of the bag down to engage the two fasteners, as discussed above. As the lower edge of closure strip 50 remains unattached to the bag, the lower fastener component is free to be hinged about its associated adhesive attachment to the bag face, to orient the fastening plane in a shear loading direction.
  • [0047]
    [0047]FIG. 10 shows another illustrative embodiment of a unitary bag closure strip 70 useful for roll top bags. In this example, the molded male fastener elements 56 are formed on a side opposite the side carrying the tear rib 54 and loop material 58. One wide band of adhesive 60 extends below the loop material, and a narrow band of adhesive 60 is disposed under the longitudinal edge adjacent the hook elements. The narrow band of adhesive secures the lowermost edge of the bag closure 70 to the face of the bag, with hook elements 56 facing the bag film as shown in FIG. 10A. The wide band of adhesive 60 permanently secures the closure strip to the rolled or folded top of the filled bag. Tear rib 54 is grasped and pulled to tear through the substrate of the closure for initial opening of the filled bag, and the bag is thereafter reclosed by tucking the rolled top between the face of the bag and the flap formed by the severed, lower, hook portion of the closure. Although this closure sequence requires both the flap and the rolled top to be simultaneously manipulated, thereby generally requiring a two-handed operation, it does provide the shear loading advantages discussed above. Furthermore, the one-piece nature of the closure strip enhances ease of assembly and provides tamper evidence. Because the closure is attached to the bag top only after filling, the loop component can be positioned according to the actual requirements of each individually filled bag. Thus, the upper portion of the closure can be adhered to the filled bag with its top already rolled down to an advantageously very tight, space-minimizing position, the closure thus put into tension as would a piece of adhesive tape. Such tight packaging is desirable to remove air and promote sealing (e.g., for perishable items) and to reduce shipping and shelf space for retail goods.
  • [0048]
    The lower band of adhesive 60 in each of the closure strips shown on bags in FIGS. 9A and 10A could be replaced, for example, with a thermal weld. In such a case, the closure strip can be applied to the bag before filling. The closure strip can be provided in continuous form, and cut to length as applied, or can be provided as finite lengths upon a release liner and applied with typical labeling equipment.
  • [0049]
    It should be realized that the above-described drawings are not to scale, but do schematically represent the concepts claimed. The closure components discussed above, for example, typically have a substrate thickness of only about 0.003 to 0.007 inch (preferably, between about 0.004 to 0.005 inch), although as illustrated they appear much thicker than the bag film, which is preferably about the same thickness as the closure substrates. The thinness and flexibility of the closure substrate, especially for the bag construction shown in FIG. 1 and compared to the bag film itself, enables the lower closure component to be readily pulled upward into a shear loading orientation. Thicker bag films can tend to be more resilient, providing greater roll top restoring force for re-orienting the closure. The thinness of the closures also enables the use of standard handling and packaging equipment.
  • [0050]
    The contents of the following applications are all incorporated herein by reference as if fully set forth: PCT/US01/31525, filed Oct. 10, 2001 and U.S. Patent Application No. 60/240,496, filed Oct. 13, 2000.
  • [0051]
    A number of embodiments of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. Accordingly, other embodiments are within the scope of my claims.

Claims (26)

    What is claimed is:
  1. 1. A gusseted bag of disposable packaging material having a roll-top closure comprising two releasably engageable fastener components, wherein
    each fastener component comprises a plastic base layer carrying either hook or loop elements,
    one fastener component being secured to one face of a rollable top of the bag, and the other fastener component being carried on a flexible flap secured to a lower portion of an opposite face of the bag.
  2. 2. The bag of claim 1 wherein the flexible flap is secured to the opposite face of the bag along an tipper edge of the flap, with its fastener component facing away from the opposite face of the bag and disposed below the upper edge of the flap, such that the fastener components are engageable by folding the top of the bag down toward the flap, and then folding the flap upward to engage the fastener components and secure the folded top between the opposite face of the bag and the flap.
  3. 3. The bag of claim 1 wherein the flexible flap is secured to the opposite face of the bag along an upper edge of the flap, with its fastener component facing away from the opposite face of the bag and disposed below an attachment of the flap to the opposite face of the bag, and wherein the top of the bag is folded down over the flap to engage the two fastener components.
  4. 4. The bag of claim 3 wherein the fastener components are constructed and arranged to redirect at least a significant portion of a peel load applied to the closure into a shear load as the folded top is released and tends to unfold, bending the flap upward to follow the unfolding top.
  5. 5. The bag of claim 1 wherein the packaging material from which the gusseted bag is formed has an outer layer of thermally weldable plastic in the form of a film or coating, and wherein the plastic base layers of the fastener components are of a compatible thermally weldable material.
  6. 6. The bag of claim 5 wherein the plastic of the outer layer of the packaging material and the base layers is of substantially the same molecular type.
  7. 7. The bag of claim 5 wherein the plastic of the outer layer of the packaging material and the base layers each comprise polyethylene.
  8. 8. The bag of claim 5 wherein the plastic of the outer layer of the packaging material and the base layers each comprise polypropylene.
  9. 9. The bag of claim 5 wherein the plastic of the outer layer of the packaging material and the base layers each comprise copolymers of EVA and polyethylene.
  10. 10. The bag of claim 5 wherein the plastic of the outer layer of the packaging material and the base layers each comprise polyester.
  11. 11. The bag of claim 1 wherein an outer surface of the gusseted bag is defined by paper, and wherein the fastener components carry upon them an adhesive layer securing the fastener components to the paper of the outer bag surface.
  12. 12. The bag of claim 11 wherein the adhesive layer comprises a pressure-sensitive adhesive.
  13. 13. The bag of claim 11 wherein the adhesive layer comprises a heat-activatable adhesive.
  14. 14. The bag of claim 1 wherein the adhesive layer comprises a moisture-sensitive adhesive.
  15. 15. The bag of claim 1 wherein the loop elements are of a non-woven loop material.
  16. 16. The bag of claim 1 wherein the hook elements are integrally molded with resin of the plastic base layer of one of the fastener components.
  17. 17. The bag of claim 1 comprising a closure strip that defines both of the fastener components and a dividing tear strip disposed between the fastener components and adapted to be removed to divide the closure strip into separate fastener components.
  18. 18. The bag of claim 1 wherein the flexible flap is secured to the opposite face of the bag along a lower edge of the flap, with its fastener component facing toward the opposite face of the bag, such that the fastener components are engageable by moving the flap away from the opposite face of the bag, folding the top of the bag down between the flap and the opposite face of the bag, and then moving the flap back toward the opposite face of the bag to engage the fastener components and secure the folded top between the opposite face of the bag and the flap.
  19. 19. A bag of disposable packaging material having a closure comprising two releasably engageable fastener components, wherein
    each fastener component comprises a plastic base layer carrying either hook or loop elements,
    one fastener component extending in a strip from an upper edge of a foldable top of the bag down one face of the bag, and the other fastener component extending in a strip from the upper edge of the foldable top of the bag down an opposite face of the bag, such that when the top of the bag is folded downward, one fastener component will engage the other fastener component to hold the top closed.
  20. 20. The bag of claim 19 wherein at least one of the fastener components extends from the top of the bag to a gusseted bottom of the bag.
  21. 21. The bag of claim 19 wherein both of the fastener components extend from the top of the bag to a gusseted bottom of the bag.
  22. 22. The bag of claim 19 wherein one of the fastener components covers a fin seal of the bag.
  23. 23. The bag of claim 19 having gusseted sides formed between the faces along which the fastener components extend.
  24. 24. A method of forming a bag of packaging material having a roll-top closure comprising two releasably engageable fastener components, each fastener component comprising a plastic base layer carrying either hook or loop elements, the method comprising
    forming a roll-top bag of the packaging material, with the first fastener component disposed on one face of a foldable top of the bag, and a flap extending from a lower portion of an opposite face of the bag and carrying the second fastener component positioned to be engageable with the first component when the top of the bag is rolled downward.
  25. 25. The method of claim 24 comprising, before forming the roll-top bag,
    pre-applying the first fastener component to the packaging material; and
    securing the flap to the packaging material, the flap carrying the second fastener component.
  26. 26. The method of claim 24 comprising
    introducing the two fastener components to a bag making process as parallel portions of a unitary closure strip;
    splitting the closure strip into the two fastener components; and then
    applying the fastener components to the packaging material.
US10413413 2000-10-13 2003-04-14 Roll top bag constructions Abandoned US20040008908A1 (en)

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US24049600 true 2000-10-13 2000-10-13
PCT/US2001/031525 WO2002030771A3 (en) 2000-10-13 2001-10-10 Roll top bag constructions
US10413413 US20040008908A1 (en) 2000-10-13 2003-04-14 Roll top bag constructions

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US10413413 US20040008908A1 (en) 2000-10-13 2003-04-14 Roll top bag constructions

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050089347A1 (en) * 2003-09-18 2005-04-28 Satoshi Muramatsu Developer container, developer supplying unit, and image forming apparatus
US20050117819A1 (en) * 2003-12-02 2005-06-02 Kingsford Howard A. Packaging closures
US20060251341A1 (en) * 2002-10-18 2006-11-09 Sampaio Camacho Jose M Resealable flexible packaging
WO2008022308A2 (en) * 2006-08-18 2008-02-21 Coating Excellence International Llc Resealable package with tamper-evident structure and method for making same
US20080056622A1 (en) * 2006-08-18 2008-03-06 Andrew Austreng Resealable package with tamper-evident structure and method for making same
EP2033904A1 (en) * 2007-09-07 2009-03-11 Construction Research and Technology GmbH Paper sack for powdery bulk material
US20090217492A1 (en) * 2008-02-29 2009-09-03 Velcro Industries B.V. Releasable fastening arrangement
US20110049138A1 (en) * 2009-09-01 2011-03-03 Lisa Korczak Apparatus for Holding, Storing and Protecting Charcoal Briquettes and Methods of Using the Same
US7971720B2 (en) 2009-06-24 2011-07-05 The Clorox Company Vertically stacking litter bag with handle
US20120052161A1 (en) * 2010-09-01 2012-03-01 Graphic Packaging International, Inc. Bag With Refastenable Foldover Closure And Pour Spout
US20120058863A1 (en) * 2009-08-18 2012-03-08 Cyril Brizard Resistance exercise trainer having portable hand-held weights
US20120195530A1 (en) * 2008-04-04 2012-08-02 Linda Kennedy Shieldable bag system and devices
EP2505510A1 (en) * 2011-03-30 2012-10-03 Britton Flexibles France Plastic package bag
US20130026170A1 (en) * 2011-07-28 2013-01-31 Paul Anthony Zerfas Reclosable packaging using a low-tack adhesive fastener
WO2015089041A1 (en) * 2013-12-12 2015-06-18 Printpack Illinois, Inc. Reclose concept of roll & close for pillow & side gusset bags
US20160192749A1 (en) * 2011-08-25 2016-07-07 Db Equipment As Accessory bag having reinforced sidewalls and variable length
US9469440B1 (en) * 2012-10-15 2016-10-18 Roberta D. Flood Protective pouch apparatus
EP2311746B1 (en) * 2005-11-07 2017-07-12 Intercontinental Great Brands LLC Flexible package with internal, resealable closure feature

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Publication number Priority date Publication date Assignee Title
US6834995B1 (en) * 2003-07-14 2004-12-28 Kmcc Western Australia Pty Ltd Bulk bag having a pair of loops to secure the discharge opening in a closed position
FR2863252B1 (en) * 2003-12-04 2007-09-07 S2F Flexico packaging bag, in particular for layers of babies, METHOD AND machine
JP5446512B2 (en) * 2009-06-30 2014-03-19 大日本印刷株式会社 Paper containers and paper containers union body
CN104229280A (en) * 2014-09-05 2014-12-24 成都市金橙包装制造有限公司 Sealing method of handbag and handbag used for sealing method

Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154239A (en) * 1963-02-18 1964-10-27 Du Pont Resealable bag
US3203621A (en) * 1963-04-12 1965-08-31 Tompkins Label Service Inc Resealable bag-top closures
US3203551A (en) * 1962-08-13 1965-08-31 Met Chem Inc Filter bag
US3325084A (en) * 1965-10-18 1967-06-13 Ausnit Steven Pressure closable fastener
US3372438A (en) * 1966-11-23 1968-03-12 American Velcro Inc Peel resistant tape assembly
US3446420A (en) * 1968-02-08 1969-05-27 American Velcro Inc Flexible mouth container
US3557853A (en) * 1969-05-01 1971-01-26 Mary Henning Jones Sanitary napkin holder
US3655118A (en) * 1970-06-15 1972-04-11 American Velcro Inc Flexible mouth container
US3807626A (en) * 1972-03-20 1974-04-30 St Regis Paper Co Gusseted pinch bottom breakaway pouch bag
US4323189A (en) * 1980-05-27 1982-04-06 Arvey Corporation Closable pouch
US4402453A (en) * 1981-06-25 1983-09-06 Arvey Corporation Pouch with closure seal strip and method for making same
US4567987A (en) * 1984-08-27 1986-02-04 Champion International Corporation Easy opening pinch bottom bag
US4580683A (en) * 1985-05-01 1986-04-08 Jiffy Packaging Corp. High security self-sealing mailing receptacle
US4584201A (en) * 1984-02-17 1986-04-22 Borden, Inc. Resealable package, method of making and use
US4638912A (en) * 1984-04-30 1987-01-27 Sig Schweizerische Industrie-Gesellschaft Package with transferable reusable closure element
US4686814A (en) * 1985-06-03 1987-08-18 Yanase Waitch K.K. Bag for containing flowable foodstuff
US4706297A (en) * 1986-04-16 1987-11-10 Minigrip, Inc. Foldable top bag and method
US4794028A (en) * 1984-04-16 1988-12-27 Velcro Industries B.V. Method for continuously producing a multi-hook fastner member and product of the method
US4955981A (en) * 1985-10-24 1990-09-11 Velcro Industries B.V. Reclosable bag having hook and loop sealing strips
US5032122A (en) * 1987-04-24 1991-07-16 The Procter & Gamble Company Loop fastening material for fastening device and method of making same
US5048692A (en) * 1990-04-03 1991-09-17 Colgate-Palmolive Company Bag closure structure in which a single resealable closure acts as both the primary and secondary closures
US5088164A (en) * 1986-09-08 1992-02-18 Minnesota Mining And Manufacturing Company Container with intermeshable closure members
US5172980A (en) * 1992-05-19 1992-12-22 Velcro Industries, B.V. Reclosable bag having hook and loop sealing strips
US5260015A (en) * 1991-08-16 1993-11-09 Velcro Industries, B.V. Method for making a laminated hook fastener
US5286112A (en) * 1992-08-17 1994-02-15 Bible Kenneth G Locking fastener and method
US5413568A (en) * 1992-08-21 1995-05-09 The Procter & Gamble Company Refastenable adhesive fastening systems for individually packaged disposable absorbent articles
US5461845A (en) * 1992-10-26 1995-10-31 Yeager; James W. Zippered film and bag
US5601368A (en) * 1995-05-11 1997-02-11 Lakeland Micro, Inc Tamper-evident container with reclosable fastener and method for making
US5707002A (en) * 1992-11-30 1998-01-13 Canon Kabushiki Kaisha Envelope for use in image forming apparatus
US5816709A (en) * 1997-10-08 1998-10-06 Demus; Andrew Leak-proof personal travel bag
US6202260B1 (en) * 1998-11-06 2001-03-20 Velcro Industries B.V. Touch fasteners their manufacture and products incorporating them
US6205623B1 (en) * 1998-11-06 2001-03-27 Velcro Industries B.V. Composite hook and loop fasteners, and products containing them

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US262159A (en) 1882-08-01 wardwell
CA2216137A1 (en) * 1995-03-21 1996-09-26 G & G Sas Di Loris Genasi A method and associated apparatus for making a re-closable package
DE69931405T2 (en) 1998-11-06 2007-04-19 Velcro Industries B.V. Fasteners and their preparation
US9926261B2 (en) 2015-03-10 2018-03-27 Rutgers, The State University Of New Jersey Bacterial efflux pump inhibitors

Patent Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203551A (en) * 1962-08-13 1965-08-31 Met Chem Inc Filter bag
US3154239A (en) * 1963-02-18 1964-10-27 Du Pont Resealable bag
US3203621A (en) * 1963-04-12 1965-08-31 Tompkins Label Service Inc Resealable bag-top closures
US3325084A (en) * 1965-10-18 1967-06-13 Ausnit Steven Pressure closable fastener
US3372438A (en) * 1966-11-23 1968-03-12 American Velcro Inc Peel resistant tape assembly
US3446420A (en) * 1968-02-08 1969-05-27 American Velcro Inc Flexible mouth container
US3557853A (en) * 1969-05-01 1971-01-26 Mary Henning Jones Sanitary napkin holder
US3655118A (en) * 1970-06-15 1972-04-11 American Velcro Inc Flexible mouth container
US3807626A (en) * 1972-03-20 1974-04-30 St Regis Paper Co Gusseted pinch bottom breakaway pouch bag
US4323189A (en) * 1980-05-27 1982-04-06 Arvey Corporation Closable pouch
US4402453A (en) * 1981-06-25 1983-09-06 Arvey Corporation Pouch with closure seal strip and method for making same
US4584201A (en) * 1984-02-17 1986-04-22 Borden, Inc. Resealable package, method of making and use
US4794028A (en) * 1984-04-16 1988-12-27 Velcro Industries B.V. Method for continuously producing a multi-hook fastner member and product of the method
US4638912A (en) * 1984-04-30 1987-01-27 Sig Schweizerische Industrie-Gesellschaft Package with transferable reusable closure element
US4567987A (en) * 1984-08-27 1986-02-04 Champion International Corporation Easy opening pinch bottom bag
US4580683A (en) * 1985-05-01 1986-04-08 Jiffy Packaging Corp. High security self-sealing mailing receptacle
US4686814A (en) * 1985-06-03 1987-08-18 Yanase Waitch K.K. Bag for containing flowable foodstuff
US4955981A (en) * 1985-10-24 1990-09-11 Velcro Industries B.V. Reclosable bag having hook and loop sealing strips
US4706297A (en) * 1986-04-16 1987-11-10 Minigrip, Inc. Foldable top bag and method
US5088164A (en) * 1986-09-08 1992-02-18 Minnesota Mining And Manufacturing Company Container with intermeshable closure members
US5032122A (en) * 1987-04-24 1991-07-16 The Procter & Gamble Company Loop fastening material for fastening device and method of making same
US5048692A (en) * 1990-04-03 1991-09-17 Colgate-Palmolive Company Bag closure structure in which a single resealable closure acts as both the primary and secondary closures
US5260015A (en) * 1991-08-16 1993-11-09 Velcro Industries, B.V. Method for making a laminated hook fastener
US5172980A (en) * 1992-05-19 1992-12-22 Velcro Industries, B.V. Reclosable bag having hook and loop sealing strips
US5286112A (en) * 1992-08-17 1994-02-15 Bible Kenneth G Locking fastener and method
US5413568A (en) * 1992-08-21 1995-05-09 The Procter & Gamble Company Refastenable adhesive fastening systems for individually packaged disposable absorbent articles
US5461845A (en) * 1992-10-26 1995-10-31 Yeager; James W. Zippered film and bag
US5707002A (en) * 1992-11-30 1998-01-13 Canon Kabushiki Kaisha Envelope for use in image forming apparatus
US5601368A (en) * 1995-05-11 1997-02-11 Lakeland Micro, Inc Tamper-evident container with reclosable fastener and method for making
US5816709A (en) * 1997-10-08 1998-10-06 Demus; Andrew Leak-proof personal travel bag
US6202260B1 (en) * 1998-11-06 2001-03-20 Velcro Industries B.V. Touch fasteners their manufacture and products incorporating them
US6205623B1 (en) * 1998-11-06 2001-03-27 Velcro Industries B.V. Composite hook and loop fasteners, and products containing them

Cited By (29)

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Publication number Priority date Publication date Assignee Title
US7703980B2 (en) * 2002-10-18 2010-04-27 Amcor Flexibles France Resealable flexible packaging
US20060251341A1 (en) * 2002-10-18 2006-11-09 Sampaio Camacho Jose M Resealable flexible packaging
US7245853B2 (en) * 2003-09-18 2007-07-17 Ricoh Company, Limited Developer container, developer supplying unit, and image forming apparatus
US20050089347A1 (en) * 2003-09-18 2005-04-28 Satoshi Muramatsu Developer container, developer supplying unit, and image forming apparatus
US20050117819A1 (en) * 2003-12-02 2005-06-02 Kingsford Howard A. Packaging closures
EP2311746B1 (en) * 2005-11-07 2017-07-12 Intercontinental Great Brands LLC Flexible package with internal, resealable closure feature
US20080056622A1 (en) * 2006-08-18 2008-03-06 Andrew Austreng Resealable package with tamper-evident structure and method for making same
WO2008022308A3 (en) * 2006-08-18 2008-10-30 Coating Excellence Internat Ll Resealable package with tamper-evident structure and method for making same
WO2008022308A2 (en) * 2006-08-18 2008-02-21 Coating Excellence International Llc Resealable package with tamper-evident structure and method for making same
US20080050055A1 (en) * 2006-08-18 2008-02-28 Andrew Austreng Resealable Package with Tamper-Evident Structure and Method for Making Same
EP2033904A1 (en) * 2007-09-07 2009-03-11 Construction Research and Technology GmbH Paper sack for powdery bulk material
US20090217492A1 (en) * 2008-02-29 2009-09-03 Velcro Industries B.V. Releasable fastening arrangement
US8545740B2 (en) 2008-02-29 2013-10-01 Velcro Industries B.V. Releasable fastening arrangement
US8051540B2 (en) 2008-02-29 2011-11-08 Velcro Industries B.V. Releasable fastening arrangement
US20120195530A1 (en) * 2008-04-04 2012-08-02 Linda Kennedy Shieldable bag system and devices
US8479922B2 (en) * 2008-04-04 2013-07-09 Linda Kennedy Shieldable bag system and devices
US7971720B2 (en) 2009-06-24 2011-07-05 The Clorox Company Vertically stacking litter bag with handle
US8387793B2 (en) 2009-06-24 2013-03-05 The Clorox Company Vertically stacking litter bags
US20120058863A1 (en) * 2009-08-18 2012-03-08 Cyril Brizard Resistance exercise trainer having portable hand-held weights
US9498669B2 (en) * 2009-08-18 2016-11-22 Cyril Brizard Resistance exercise trainer having portable hand-held weights
US20110049138A1 (en) * 2009-09-01 2011-03-03 Lisa Korczak Apparatus for Holding, Storing and Protecting Charcoal Briquettes and Methods of Using the Same
US20120052161A1 (en) * 2010-09-01 2012-03-01 Graphic Packaging International, Inc. Bag With Refastenable Foldover Closure And Pour Spout
EP2505510A1 (en) * 2011-03-30 2012-10-03 Britton Flexibles France Plastic package bag
FR2973349A1 (en) * 2011-03-30 2012-10-05 Veriplast Flexible plastic material packaging bag
US9499309B2 (en) * 2011-07-28 2016-11-22 Intercontinental Great Brands Llc Reclosable packaging using a low-tack adhesive fastener
US20130026170A1 (en) * 2011-07-28 2013-01-31 Paul Anthony Zerfas Reclosable packaging using a low-tack adhesive fastener
US20160192749A1 (en) * 2011-08-25 2016-07-07 Db Equipment As Accessory bag having reinforced sidewalls and variable length
US9469440B1 (en) * 2012-10-15 2016-10-18 Roberta D. Flood Protective pouch apparatus
WO2015089041A1 (en) * 2013-12-12 2015-06-18 Printpack Illinois, Inc. Reclose concept of roll & close for pillow & side gusset bags

Also Published As

Publication number Publication date Type
CA2425658A1 (en) 2002-04-18 application
EP1326782A2 (en) 2003-07-16 application
WO2002030771A3 (en) 2003-02-06 application
CN1478036A (en) 2004-02-25 application
JP2004510655A (en) 2004-04-08 application
WO2002030771A2 (en) 2002-04-18 application
CN1226166C (en) 2005-11-09 grant

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Owner name: VELCRO INDUSTRIES B.V., NETHERLANDS ANTILLES

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHEPARD, WILLIAM H.;REEL/FRAME:014498/0542

Effective date: 20030911