Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20060133700 A1
Publication typeApplication
Application numberUS 11/316,524
Publication dateJun 22, 2006
Filing dateDec 21, 2005
Priority dateMay 11, 1999
Also published asCA2337127A1, CA2337127C, DE69929205D1, DE69929205T2, DE69942550D1, EP1096868A1, EP1096868B1, EP1514491A2, EP1514491A3, EP1661479A2, EP1661479A3, EP1661479B1, EP2243389A1, EP2243389B1, US6286999, US6419391, US6439770, US6575625, US6663283, US6712509, US7008106, US20010021280, US20010026649, US20010043762, US20020009239, US20020097924, US20030063819, WO2000067605A1
Publication number11316524, 316524, US 2006/0133700 A1, US 2006/133700 A1, US 20060133700 A1, US 20060133700A1, US 2006133700 A1, US 2006133700A1, US-A1-20060133700, US-A1-2006133700, US2006/0133700A1, US2006/133700A1, US20060133700 A1, US20060133700A1, US2006133700 A1, US2006133700A1
InventorsCraig Cappel
Original AssigneeCappel Craig E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tamper-evident reclosable bag
US 20060133700 A1
Abstract
A plastic bag comprises opposing body panels fixedly connected to each other along a pair of sides and a bottom bridging the pair of sides. A reclosable zipper extending along a mouth portion formed opposite the sealed bottom of the plastic bag. The zipper is preferably free of graspable upper pull flanges in order to best accommodate a slider and inhibit operation of the zipper without the slider. The slider is mounted to the zipper for movement between a closed position and an open position. The zipper is closed while the slider is in the closed position. The zipper is opened in response to movement of the slider to the open position. To inhibit tampering with the contents of the bag, the bag includes a tamper-evident feature. In one set of embodiments, the tamper-evident feature initially maintains the slider in the closed position and allows the slider to move away from the closed position toward the open position in response to removing or breaking the tamper-evident feature. In another set of embodiments, the tamper-evident feature initially maintains a mouth portion of the plastic bag in a folded position and allows the mouth portion to be unfolded in response to removing or breaking the tamper-evident feature.
Images(21)
Previous page
Next page
Claims(23)
1-49. (canceled)
50. A reclosable slider bag comprising:
first and second opposing body panels connected to each other along a pair of sides and a bottom bridging the pair of sides;
a reclosable zipper extending along a mouth formed opposite the bottom and including a rib profile and a groove profile, the rib profile and the groove profile adapted to interlock with each other;
a slider slidably mounted to the zipper for movement between a closed position and an open position, the rib profile and the groove profile being interlocked while the slider is in the closed position, the rib profile and the groove profile being progressively disengaged in response to movement of the slider to the open position; and
a removable member detachably connected to at least one of the opposing body panels at a line of weakness located below the rib profile and the groove profile, the member extending over the zipper and protruding above the slider, the member being removable from the at least one of the opposing body panels along the line of weakness to allow access to an interior of the bag.
51. The bag of claim 50 wherein the member is capable of being grasped by fingers to allow the member to be torn from the at least one of the opposing body panels along the line of weakness.
52. The bag of claim 50 wherein the line of weakness includes a perforation.
53. The bag of claim 50 wherein the line of weakness includes a thinned area.
54. The bag of claim 50 wherein the line of weakness includes a score.
55. The bag of claim 50 wherein the member extends over only a portion of a length of the zipper.
56. The bag of claim 50 wherein the member envelops the zipper.
57. The bag of claim 50 wherein the line of weakness is present in both of the first and second opposing body panels.
58. The bag of claim 57 wherein the member is removable along the respective line of weakness in each of the first and second opposing body panels.
59. The bag of claim 50 wherein the line of weakness has a length that is less than a length of the zipper.
60. The bag of claim 50 wherein the line of weakness extends along the member.
61. The bag of claim 50 wherein the member includes first and second member panels connected to each other at uppermost portions.
62. The bag of claim 61 wherein the first and second member panels are connected at a location above the slider.
63. A method of accessing contents within a bag, the bag including first and second opposing body panels and a reclosable zipper extending along a bag mouth formed by the body panels, the zipper having a slider slidably mounted to the zipper for movement between a closed position wherein the zipper is interlocked and an open position wherein the zipper is unlocked, the zipper including a rib profile and a groove profile, the method comprising:
tearing an upwardly extending member from the body panels along a line of weakness in the body panels to permit access to contents with the bag, the line of weakness being below the rib profile and the groove profile; and
moving the slider from the closed position to the open position to gain access to contents with the bag.
64. The method of claim 63 wherein the line of weakness is a perforation.
65. The method of claim 63 wherein the line of weakness is a thinned area.
66. The method of claim 63 wherein the line of weakness is a score.
67. The method of claim 63 wherein the step of tearing the member from the body panels along the line of weakness comprises grasping the member.
68. A method of using a reclosable slider bag, the bag comprising first and second opposing body panels defining an interior, a reclosable zipper extending along a bag mouth formed by the body panels, and a member detachably attached to at least one of the body panels and at least partially enveloping the zipper, the zipper having a slider slidably mounted to the zipper for movement between a closed position wherein the zipper is interlocked and an open position wherein the zipper is unlocked, the zipper providing access to the interior of the bag, the method comprising:
removing the member from the at least one of the body panels along a line of weakness located below the zipper; and
moving the slider in a first direction to disengage the zipper, thereby providing access to the interior of the bag.
69. The method of claim 68 wherein the step of removing the member at the line of weakness comprises removing the member at a perforation, a thinned area, or a score.
70. The method of claim 68 wherein the step of removing the member from the at least one of the body panels comprises grasping the member.
71. The method of claim 69 wherein the step of removing the member from the at least one of the body panels comprises tearing the member from the at least one of the body panels along the line of weakness.
Description
    FIELD OF THE INVENTION
  • [0001]
    The present invention generally relates to reclosable plastic bags and, more particularly, relates to a reclosable plastic bag having a tamper-evident feature. In one set of embodiments, the plastic bag has a zipper opened and closed using a slider mounted to the zipper, and the tamper-evident feature initially maintains the slider at a closed position on the zipper and allows the slider to move away from the closed position to an open position on the zipper in response to removing or breaking the tamper-evident feature. In another set of embodiments, the tamper-evident feature initially maintains a mouth portion of the plastic bag in a folded position and allows the mouth portion to be unfolded in response to removing or breaking the tamper-evident feature.
  • BACKGROUND OF THE INVENTION
  • [0002]
    Reclosable slider bags of the type disclosed in U.S. Pat. No. 5,067,208 include a zipper that is opened and closed by movement of a slider mounted to the zipper. Due to the ease of operating the slider, such slider bags have increased in popularity over the last few years. Heretofore, the primary market for slider bags has been consumers who purchase a package of empty slider bags and then fill the slider bags with products at home. However, with the increasing popularity of the slider bags, product manufacturers have become interested in packaging their food and nonfood products in slider bags for sale to consumers. The slider bags are a great convenience to the consumer who purchases these product-filled bags especially for products of the type where only a portion of the product is used at any given time. The product applications for which slider bags may be useful are virtually unlimited. The consumer may initially open the slider bag, use a portion of the product, and then easily reclose the slider bag. Due to the ease of using the slider bag, the slider bag is typically preferred over one-time openable bags, which are significantly more difficult to open and reclose. To open a one-time openable bag, the consumer may need to tear the bag open and may require a scissors or other tool to facilitate the opening process; to reclose the bag, the consumer typically must roll the top of the bag closed and may require an extra fastening mechanism such as a clip, tie, or tape to maintain the bag in the closed position.
  • [0003]
    A problem with plastic slider bags is that if such bags are to be prepackaged with a food or non-food product and then sold in a store, the contents of the plastic bags can easily be tampered with prior to purchase by the consumer. To inhibit such tampering, slider bags have been provided with tamper-evident features of the type disclosed in U.S. Pat. Nos. 5,669,715; 5,713,669; and 5,775,812. While such tamper-evident features are capable of providing tamper evidence upon opening the bag, bag manufacturers such as the assignee of the foregoing patents are continually striving to develop new bag features for improving the functionality of their bags.
  • SUMMARY OF THE INVENTION
  • [0004]
    To that end, the present invention provides a plastic bag comprising first and second opposing body panels fixedly connected to each other along a pair of sides and a bottom bridging the pair of sides. The bag is provided with a reclosable zipper extending along a mouth portion formed opposite the sealed bottom of the plastic bag. The zipper is preferably free of graspable upper pull flanges in order to best accommodate a slider and inhibit operation of the zipper without the slider. The slider is slidably mounted to the zipper for movement between a closed position and an open position. The zipper is closed while the slider is in the closed position. The zipper is opened in response to movement of the slider to the open position. The bag optionally includes end terminations at opposite ends of the zipper to prevent the slider from going past the ends of the zipper. To provide the plastic bag with tamper evidence, the bag includes a tamper-evident feature.
  • [0005]
    In one set of embodiments, the tamper-evident feature initially maintains the slider in the closed position and allows the slider to move away from the closed position toward the open position in response to removing or breaking the tamper-evident feature. The tamper-evident feature may take a variety of forms including for example: a removable cardboard, paper, or plastic member covering or adjacent to the slider in the closed position and adhered, stapled, triction fit, or connected in some other way to the bag to hold the member in place; a removable flexible member extending through a hole in the slider or through a hole in the zipper adjacent to the slider in the closed position: a removable stepped retaining element removably attached to one of the bag body panels near the closed position of the slider such that a shoulder of the slider is initially engaged to the stepped element and is disengaged therefrom upon removal of the stepped element; a latch connected to the end termination and releasably engaged to the slider in the closed position; a latch connected to the slider and releasably engaged to the end termination when the slider is in the closed position; and a removable U-shaped element extending through slots in the slider in the closed position and dug into the zipper.
  • [0006]
    The tamper-evident features noted above initially maintain the slider in the closed position. Therefore, prior to removing or breaking the tamper-evident feature, it is difficult to gain access to the interior of the bag because, in the absence of graspable upper flanges, the zipper is difficult to grasp and open by hand without the use of the slider. After the tamper-evident feature is removed or broken, the slider may be used to open the zipper and access the contents of the bag.
  • [0007]
    In another set of embodiments, the tamper-evident feature initially maintains the mouth portion of the plastic bag in a folded position and allows the mouth portion to be unfolded in response to removing or breaking the tamper-evident feature. The tamper-evident feature can be employed with both slider and sliderless bags and may take a variety of forms including for example: spot seals detachably sealing the sides of the folded mouth portion to the sides of the bag; spot seals detachably sealing the inner panel of the folded mouth portion to the adjacent bag panel; a removable flexible member passing through both the folded mouth portion and the adjacent unfolded portion of the bag: one or more stickers (adhesive strips) attaching the folded mouth portion to the adjacent unfolded portion of the bag; and combinations of the foregoing. If the flexible member or sticker is employed and the plastic bag includes a slider for operating the zipper, the flexible member or sticker may be strategically positioned to perform the dual function of maintaining the mouth portion in the folded position and preventing the slider from being moved away from the closed position until the flexible member or sticker is removed from the bag.
  • [0008]
    The tamper evident features of the present invention effectively inhibit tampering with contents of the bag to a degree that is especially useful for non-food and some food applications, where tamper-proof packaging is not required but tamper-resistant packaging is nonetheless desirable.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0009]
    Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:
  • [0010]
    FIG. 1 is an isometric view of a reclosable plastic slider bag having a slider mounted to a zipper in a closed position;
  • [0011]
    FIG. 2 is an isometric view of a mouth portion of the slider bag showing the slider moved away from the closed position so that the zipper is partially opened;
  • [0012]
    FIG. 3 is a sectional view taken generally along line 3-3 in FIG. 1;
  • [0013]
    FIG. 4 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a removable adhesive label;
  • [0014]
    FIG. 4 b is an enlarged isometric view of the slider bag showing the adhesive label in the process of being removed from the bag;
  • [0015]
    FIG. 4 c is a sectional view taken generally along line 4 c-4 c in FIG. 4 a;
  • [0016]
    FIG. 4 d is a sectional view taken generally along line 4 d-4 d in FIG. 4 b;
  • [0017]
    FIG. 5 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a flexible member, such as a price tag pin, extending through a 18 hole in the slider;
  • [0018]
    FIG. 5 b is a partial isometric view of the slider bag showing the flexible member in the process of being cut away from the slider;
  • [0019]
    FIG. 5 c is a sectional view taken generally along line 5 c-5 c in FIG. 5 a;
  • [0020]
    FIG. 5 d is a sectional view taken generally along line 5 d-5 d in FIG. 5 b;
  • [0021]
    FIG. 6 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of flexible member, such as a price tag pin, extending through a hole in the zipper adjacent to the slider in the closed position;
  • [0022]
    FIG. 6 b is a partial isometric view of the slider bag showing the flexible member in the process of being cut away from the zipper;
  • [0023]
    FIG. 6 c is a sectional view taken generally along line 6 c-6 c in FIG. 6 a;
  • [0024]
    FIG. 6 d is a sectional view taken generally along line 6 d-6 d in FIG. 6 b;
  • [0025]
    FIG. 7 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a stepped retaining element attached to one of the bag body panels and engaging a shoulder of the slider in the closed position;
  • [0026]
    FIG. 7 b is a partial isometric view of the slider bag showing the stepped retaining element in the process of being detached from the bag body panel and disengaged from the slider;
  • [0027]
    FIG. 7 c is a sectional view taken generally along line 7 c-7 c in FIG. 7 a;
  • [0028]
    FIG. 7 d is a sectional view taken generally along line 7 d-7 d in FIG. 7 b;
  • [0029]
    FIG. 7 e is a partial isometric view of a slider bag having a tamper-evident feature in the form of a stepped retaining element integrally formed with a slider end stop and engaging a shoulder of the slider in the closed position;
  • [0030]
    FIG. 7 f is a partial isometric view of the slider bag showing the stepped retaining element in the process of being detached from the slider end stop and disengaged from the slider;
  • [0031]
    FIG. 7 g is a sectional view taken generally along line 7 g-7 g in FIG. 7 e;
  • [0032]
    FIG. 7 h is a sectional view taken generally along line 7 h-7 h in FIG. 7 f;
  • [0033]
    FIG. 8 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of shrink wrap encapsulating the slider in the closed position;
  • [0034]
    FIG. 8 b is a partial isometric view of the slider bag showing the shrink wrap in the process of being removed from the bag;
  • [0035]
    FIG. 8 c is a sectional view taken generally along line 8 c-8 c in FIG. 8 a;
  • [0036]
    FIG. 8 d is a sectional view taken generally along line 8 d-8 d in FIG. 8 b;
  • [0037]
    FIG. 9 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a plastic sleeve covering at least a portion of the slider in the closed position;
  • [0038]
    FIG. 9 b is a partial isometric view of the slider bag showing the plastic sleeve in the process of being removed from the bag;
  • [0039]
    FIG. 9 c is a sectional view taken generally along line 9 c-9 c in FIG. 9 a;
  • [0040]
    FIG. 9 d is a sectional view taken generally along line 9 d-9 d in FIG. 9 b;
  • [0041]
    FIG. 10 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of an extruded friction fit plastic sleeve located adjacent to the slider in the closed position;
  • [0042]
    FIG. 10 b is a partial isometric view of the slider bag showing the plastic sleeve in the process of being removed from the bag;
  • [0043]
    FIG. 10 c is a sectional view taken generally along line 10 c-10 c in FIG. 10 a;
  • [0044]
    FIG. 10 d is a sectional view taken generally along line 10 d-10 d in FIG. 10 b;
  • [0045]
    FIG. 11 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a cardboard, paper, plastic, or foil strip stapled to the bag adjacent to the slider in the closed position;
  • [0046]
    FIG. 11 b is a partial isometric view of the slider bag showing the stapled strip in the process of being removed from the bag;
  • [0047]
    FIG. 11 c is a sectional view taken generally along line 11 c-11 c in FIG. 11 a;
  • [0048]
    FIG. 11 d is a sectional view taken generally along line 11 d-11 d in FIG. 11 b;
  • [0049]
    FIG. 12 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a plastic tab located adjacent to the slider in the closed position, and including a pair of tab panels detachably connected to and extending upward from respective bag body panels and attached to each other above the zipper;
  • [0050]
    FIG. 12 b is a partial isometric view of the slider bag showing the plastic tab in the process of being removed from the bag;
  • [0051]
    FIG. 12 c is a sectional view taken generally along line 12 c-12 c in FIG. 12 a;
  • [0052]
    FIG. 12 d is a sectional view taken generally along line 12 d-12 d in FIG. 12 b;
  • [0053]
    FIG. 13 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a latch extending from a slider end stop and releasably engaged to the slider in the closed position;
  • [0054]
    FIG. 13 b is a partial isometric view of the slider bag showing the latch in the process of being disengaged from the slider;
  • [0055]
    FIG. 13 c is a sectional view taken generally along line 13 c-13 c in FIG. 13 a;
  • [0056]
    FIG. 13 d is a sectional view taken generally along line 13 d-13 d in FIG. 13 b;
  • [0057]
    FIG. 14 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a latch extending from a slider end stop and engaged to the slider in the closed position;
  • [0058]
    FIG. 14 b is a partial isometric view of the slider bag showing the latch in the process of being broken to release the slider from the end stop;
  • [0059]
    FIG. 14 c is a sectional view taken generally along line 14 c-14 c in FIG. 14 a;
  • [0060]
    FIG. 14 d is a sectional view taken generally along line 14 d-14 d in FIG. 14 b;
  • [0061]
    FIG. 15 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a latch extending from the slider in the closed position and engaged to the slider end stop;
  • [0062]
    FIG. 15 b is a partial isometric view of the slider bag showing the latch in the process of being broken to release the slider from the end stop;
  • [0063]
    FIG. 15 c is a sectional view taken generally along line 15 c-15 c in FIG. 15 a;
  • [0064]
    FIG. 15 d is a sectional view taken generally along line 15 d-15 d in FIG. 15 b;
  • [0065]
    FIG. 16 a is a partial isometric view of a slider bag having a tamper-evident feature in the form of a U-shaped element extending through slots in the slider in the closed position and dug into the zipper;
  • [0066]
    FIG. 16 b is a partial isometric view of the slider bag showing the U-shaped element in the process of being disengaged from the zipper and removed from the slider;
  • [0067]
    FIG. 16 c is a sectional view taken generally along line 16 c-16 c in FIG. 16 a;
  • [0068]
    FIG. 16 d is a sectional view taken generally along line 16 d-16 d in FIG. 16 b;
  • [0069]
    FIG. 17 a is an isometric view of a slider bag having a tamper-evident feature created by folding over the mouth portion of the bag and detachably connecting the folded-over mouth portion to the sides of the bag;
  • [0070]
    FIG. 17 b is a partial isometric view of the slider bag showing one of the side seals attaching the folded-over mouth portion to the sides of the bag;
  • [0071]
    FIG. 17 c is a partial isometric view of the slider bag after the side seals have been broken to allow the mouth portion to be unfolded;
  • [0072]
    FIG. 18 is an isometric view of a slider bag having a tamper-evident feature created by folding over the mouth portion of the bag and securing the folded-over mouth portion with a price tag pin and a side seal;
  • [0073]
    FIG. 19 a is an isometric view of a slider bag having a tamper-evident feature created by folding over the mouth portion of the bag and detachably sealing the inner panel of the folded-over mouth portion to the adjacent bag panel;
  • [0074]
    FIG. 19 b is a section view taken generally along line 19 b-19 b in FIG. 19 a;
  • [0075]
    FIG. 20 a is an isometric view of a slider bag having a tamper-evident feature created by folding over the mouth portion of the bag and securing the folded-over mouth portion with partially removable stickers; and
  • [0076]
    FIG. 20 b is an isometric view of the slider bag in FIG. 20 a after the stickers have been partially removed to allow the mouth portion to be unfolded.
  • [0077]
    While the invention is susceptible to various modifications and alternative forms, a specific embodiment thereof has been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0078]
    Turning now to the drawings, FIG. 1 depicts a reclosable plastic slider bag 10 comprising first and second opposing body panels 12 and 14 fixedly connected to each other along a pair of sides 16 and 18 and a bottom 20 bridging the pair of sides 16 and 18. The bag is provided with a reclosable zipper 22 extending along a mouth portion formed opposite the closed bottom 20 of the plastic bag.
  • [0079]
    Referring to FIG. 3, the zipper 22 includes a male track and a female track. The male track includes a male profile 24 and a first depending fin or flange 26 extending downward from the male profile 24. Likewise, the female track includes a female profile 28 and a second depending fin or flange 30 extending downward from the female profile 28. The first and second fins 26 and 30 are thermally fused to inner surfaces of the respective first and second body panels 12 and 14. Alternatively, the zipper 22 may be extruded with the body panels 12 and 14 such that the first fin 26 is integrally formed with the first body panel 12 and the second fin 30 is integrally formed with the second body panel 14. To provide a hermetic seal for the contents of the bag, the first and second fins 26 and 30 may be joined to each other at their lowermost ends along a line of weakness to effectively create a single tamper-evident continuous fin. If the fins are joined to each other, they must be separated from each other along the line of weakness in order to gain access to the contents of the bag. Further information concerning the joined fins may be obtained from U.S. application Ser. No. 08/950,535 filed Oct. 15, 1997 and entitled “Reclosable Fastener Strip With Tamper Evident Feature.” which is incorporated herein by reference in its entirety.
  • [0080]
    To assist in opening the plastic bag, a slider 32 is slidably mounted to the zipper 22 for movement between a closed position and an open position. In the closed position of the slider 32 shown in FIG. 1, the male and female profiles 24 and 28 are interlocked with each other. Movement of the slider 32 from the closed position in FIG. 1 toward the open position (see FIG. 2) disengages the male and female profiles 24 and 28 from each other and allows a user to gain access to the interior of the plastic bag. The zipper 22 is preferably free of graspable upper pull flanges extending upward from the profiles 24 and 28 in order to facilitate mounting and movement of the slider 32 along the zipper 22. Also, the absence of such upper pull flanges inhibits a user from opening and closing the zipper 22 without the use of the slider 32.
  • [0081]
    Opposite ends of the zipper 22 are provided with end termination clamps 34. Each end clamp 34 includes a strap member that wraps over the top of the zipper 22. To mount the strap to the zipper 22, one end of the strap is provided with a rivet-like member that is adapted to penetrate through the bag material and into a cooperating opening at the other end of the strap. The end clamps 34 perform the dual function of stops for the ends of the zipper 22 to prevent the slider 32 from going past the end of the zipper 22 and, in addition, they hold the male and female profiles 24 and 28 together to resist stresses applied to the profiles during normal use of the plastic bag. Further details concerning the construction and operation of the slider 32 and the end clamps 34 may be obtained from U.S. Pat. No. 5,067,208 to Herrington, Jr. et al., which is incorporated herein by reference in its entirety. The end terminations 34 are merely illustrative and may take other forms known in the art, such as those disclosed in U.S. Pat. Nos. 5,482,375; 5,448,807; 5,442,837; 5,405,478; 5,161,286; 5,131,121; and 5,088,971 and in U.S. application Ser. No. 08/698,923 filed Aug. 16, 1996 and entitled “End Posts for Plastic Zipper.” all of which are incorporated herein by reference in their entireties.
  • [0082]
    To provide the plastic bag with tamper evidence, the bag includes a tamper-evident feature. In one set of embodiments depicted in FIGS. 4 a-d through 16 a-d. the tamper-evident feature initially maintains the slider 32 in the closed position (FIG. 1) and allows the slider 32 to move away from the closed position toward the open position (see FIG. 2) in response to removing or breaking the tamper-evident feature. Prior to removing or breaking the tamper evident feature, it is difficult to gain access to the interior of the bag because, in the absence of graspable upper flanges, the zipper 22 is difficult to grasp and open by hand without the use of the slider 32. The tamper-evident feature may take a variety forms which are discussed below in connection with FIGS. 4 a-d through 16 a-d.
  • [0083]
    Referring to FIGS. 4 a-d, there is shown a tamper-evident feature in the form of a partially removable adhesive label 40 adjacent to the narrow closing end 32 a of the slider 32 when the slider 32 is in the closed position on the zipper 22. Opposing end sections 40 a and 40 b of the label 40 are permanently adhered to outer surfaces of the opposing bag body panels 12 and 14, while a middle portion 40 c of the label 40 is detachably connected to these end sections 40 a and 40 b along respective perforation lines. One or both ends of each perforation line may be provided with a notch to help initiate tearing along the perforation line. The middle portion 40 c is either not adhered to the bag or is peelably adhered to the bag. Prior to removal, the label 40 extends over the zipper 22 as shown in FIGS. 4 a and 4 c so as to obstruct movement of the slider 32 away from the closed position. To allow movement of the slider 32 and thereby gain access to the interior of the bag, a user grasps the portion 40 c of the label 40 extending over the zipper 22 and detaches this portion 40 c from the end sections 40 a and 40 b as shown in FIGS. 4 b and 4 d. The end sections 40 a and 40 b remaining on the bag provide evidence of tampering. In an alternative embodiment, the label 40 does not include the perforation lines, but rather is removed using a cutting tool such as a scissors or knife.
  • [0084]
    Referring to FIGS. 5 a-d, there is shown a tamper-evident feature in the form of a flexible member, such as a conventional plastic price tag pin 50, extending through a hole 52 in the slider 32 and through the zipper 22 when the slider 32 is in the closed position on the zipper 22. The price tag pin 50 includes a pair of stops 54 and 56 at its opposing ends to keep the pin 50 in place. Since the price tag pin 50 is anchored to the zipper 22, the slider 32 cannot be moved away from the closed position until the price tag pin 50 is clipped off the bag as shown in FIGS. 5 b and 5 d. As shown in FIGS. 6 a-d, the price tag pin 50 may alternatively be anchored to the zipper 22 adjacent to the closing end 32 a of the slider 32 when the slider 32 is in the closed position on the zipper 22. The zipper 22 includes the profiles 24 and 28 and the fins 26 and 30 extending downward from the respective profiles 24 and 28. The price tag pin 50 may extend through a hole in either the profiles 24 and 28 (not shown) or the fins 26 and 30 as shown in FIG. 6 c. The pin 50 may extend through both the fins and the opposing body panels (as shown) or just the fins. Prior to removal of the pin 50, the pin 50 blocks movement of the slider 32 away from the closed position.
  • [0085]
    Referring to FIGS. 7 a-d, there is shown a tamper-evident feature in the form of a removable stepped retaining element 70 removably attached to the bag body panel 12 just below the zipper 22 at the closed position of the slider. The stepped element 70 may be attached to the bag body panel 12 by a peel seal or other weak adhesive that allows the stepped element 70 to be peeled or pried away as shown in FIGS. 7 b and 7 d. The stepped element 70 forms one or more steps 72 having respective sloped surfaces. The sloped surfaces of the respective steps 72 may be inclined such that each step 72 gradually increases in thickness in a direction approaching the end stop 34. To engage one of the steps 72, the slider 32 includes at least one inwardly extending shoulder 73 that is contoured to form a protrusion or bump 74. The protrusion 74 may be located anywhere along the shoulder 73. Further details concerning the contoured shoulder 73 may be obtained from U.S. application Ser. No. 08/938,047 filed Apr. 26, 1997, entitled “High-Strength Slider for a Reclosable Bag,” and incorporated herein by reference in its entirety. When the slider 32 is in the closed position, the protrusion 74 on the slider shoulder 73 engages a raised edge 76 (FIG. 7 a) on one of the steps 72.
  • [0086]
    To create the tamper-evident feature in FIGS. 7 a-d, the stepped element 70 is preferably first adhered to the bag body panel 12. Subsequently, the slider 32 may be engaged to the stepped element 70 using a couple techniques. In one technique, if the slider 32 is of the wing-lock type disclosed in U.S. Pat. No. 5,067,208, the slider 32 may be installed on the zipper 22 at a location immediately above the stepped element 70. The wing-lock slider 32 includes a pair of hinged wings 78 and 79 that, prior to installing the slider 32 on the zipper 22, are spread away from each other in an open position (not shown). The wing 78 forms the shoulder 73 having the protrusion 74. The slider 32 is initially mounted to the zipper 22 above the stopped element with the wings 78 and 79 in the open or spread position, and then the wings 78 and 79 are rotated downward and latched in a closed position depicted in FIGS. 7 a-d. As the wings 78 and 79 are latched in the closed position, the protrusion 74 engages the edge 76 of one of the steps 72. In another technique, the slider 32 is installed on the zipper 22 at a location away from the stepped element 70. The slider 32 is then moved along the zipper 22 to the closed position. When approaching the closed position, the slider shoulder 73 is forced over the stepped element 70 until the protrusion 74 engages the edge 76 of one of the steps 72.
  • [0087]
    To remove the stepped element 70 and thereby allow movement of the slider 32 away from the closed position, a user grasps a tab 71 of the stepped element 70 and peels or pries the stepped element 70 away from the bag body panel 12 as shown in FIGS. 7 b and 7 d.
  • [0088]
    Referring to FIGS. 7 e-h, in an alternative embodiment a breakaway stepped element 70′ is integrally formed with the end stop 34 and is detachably connected to the end stop 34 along a weakened area of connection 75 (FIG. 7 e). To remove the stepped element 70′, the slider 32 is forced away from the closed position as shown in FIG. 7 f to break the weakened connection 75. The detached stepped element 70′ is then removed from beneath the slider 32. To facilitate removal of the stepped element 70′, a pull tab akin to the tab 71 in FIGS. 7 a-d may be provided. Instead of detaching the stepped element 70′ from the end stop 34 by forcibly moving the slider 32 away from the end stop 34, the stepped element 70′ may alternatively be provided with a pull tab that is grasped and pulled by a user to first rupture the weakened connection 75 and then remove the detached stepped element 70 from beneath the slider 32.
  • [0089]
    Referring to FIGS. 8 a-d. there is shown a tamper-evident feature in the form of removable plastic shrink wrap 80 encapsulating the slider 32 when the slider 32 is in the closed position. The shrink wrap 80 is adhered or thermally fused to the bag body panels 12 and 14. The shrink wrap 80 may additionally encapsulate the end stop 34, in which case the shrink wrap 80 may only need to be attached to itself and not to the body panels in order to be held in place. Alternatively, the shrink wrap may be shrunk over the zipper 22 in front of the slider 32. To allow the slider 32 to be moved away from the closed position, the shrink wrap 80 is torn or peeled away from the bag as shown in FIGS. 8 b and 8 d. The shrink wrap 80 may be notched or perforated to facilitate its removal. Such perforations could be located along the top or sides of the shrink wrap 80 depending upon the manner in which it is desired that the shrink wrap 80 be torn away. It is contemplated that a portion of the shrink wrap 80 could remain attached to the bag body panels 12 and 14 for tamper evidence after most of the shrink wrap 80 is torn away, so long as the remaining portion does not interfere with the movement of the slider 32.
  • [0090]
    Referring to FIGS. 9 a-d, there is shown a tamper-evident feature in the form of a rigid or flexible plastic sleeve 90 partially covering the slider 32 when the slider 32 is in the closed position. Alternatively, the sleeve 90 may be increased in length to cover the entire slider 32. The sleeve 90 is either adhered or thermally fused to one or both of the bag body panels 12 and 14 as shown in FIGS. 9 a and 9 c or attached to the end stop 34 (not shown). To allow the slider 32 to be moved away from the closed position, the plastic sleeve 90 is torn or peeled away from the bag as shown in FIGS. 9 b and 9 d.
  • [0091]
    Referring to FIGS. 10 a-d, in an alternative embodiment a plastic sleeve 100 is mounted over the zipper 22 adjacent to the closing end 32 a of the slider 32 when the slider is in the closed position. The sleeve 100 may be adhered or thermally fused to the bag body panels 12 and 14 and, additionally or alternatively, may be releasably connected to the zipper 22 by a friction fit. Also, the sleeve 100 may extend along only a short portion of the length of the zipper 22 as shown, or may extend along substantially the entire length of the zipper 22 less the region of the zipper 22 occupied by the slider 32. To achieve a strong friction fit between the sleeve 100 and the zipper 22, the sleeve 100 is preferably extruded to have an inner profile conforming to an outer profile of the zipper 22 as shown in FIG. 10 c. When the sleeve 100 is mounted to the zipper 22, the sleeve 100 obstructs movement of the slider 32 away from the closed position. To allow the slider 32 to be moved away from the closed position, the sleeve 100 is pried off the zipper 22 either by pulling the entire sleeve 100 upward off the zipper 22 (not shown) or, if the sleeve 100 is sufficiently flexible, by releasing and lifting one side of the sleeve 100 as shown in FIGS. 10 b and 10 d.
  • [0092]
    Referring to FIGS. 11 a-d, there is shown a tamper-evident feature in the form of a cardboard, paper, plastic, or foil strip 110 wrapped over the zipper 22 at a location adjacent to the closing end 32 a of the slider 32 when the slider 32 is in the closed position. The strip 110 is stapled to the bag body panels 12 and 14. To allow the slider 32 to be moved away from its closed position, the staple is removed from the strip 110 which is, in turn, removed from the bag.
  • [0093]
    Referring to FIGS. 12 a-d, there is shown a tamper-evident feature in the form of a plastic tab 120 located adjacent to the closing end 32 a of the slider 32 when the slider is in the closed position. The plastic tab 120 includes a pair of tab panels 120 a and 120 b (FIG. 12 c) integrally formed with the respective bag body panels 12 and 14 and detachable therefrom along lines of weakness 122 (FIG. 12 a). The lines of weakness may be perforations, scores, thinned areas, or the like. The tab panels 120 a and 120 b extend upwardly above the zipper 22 and are adhered or thermally fused to each other above the zipper 22. To allow the slider 32 to be moved away from its closed position, the tab panels 120 a and 120 b are grasped and pulled in a generally upward direction until they are broken away from the bag body panels 12 and 14 along the lines of weakness 122 as shown in FIGS. 12 b and 12 d. It is contemplated that a single tab panel maybe used in place of the pair of tab panels 120 a and 120 b.
  • [0094]
    Referring to FIGS. 13 a-d, there is shown a tamper-evident feature in the form of a latch 130 extending from the end stop 34 and releasably engaged to the slider 32 when the slider 32 is in the closed position. The illustrated latch 130 is connected to the end stop 34 along a one-time breakable hinge that biases the latch 130 toward the position depicted in FIG. 13 a. The latch 130 may extend along the side of the slider 32 as shown or, alternatively, may extend along the top wall of the slider 32. As shown in FIG. 13 a, the latch 130 is shaped to extend about the exterior of the slider 32 and forms a distal hook 132 that engages the closing end 32 a of the slider 32. Alternatively, the slider 32 may be modified to include a protruding tab, and the latch 130 may be adapted to engage the protruding tab. To allow the slider 32 to be moved away from its closed position, the latch 130 is pivoted outward away from the slider 32 until the hook 132 disengages from the slider 32 as shown in FIGS. 13 b and 13 d. The latch 130 is then torn away from the end stop 34 and discarded.
  • [0095]
    Referring to FIGS. 14 a-d. there is shown a tamper-evident feature in the form of an arrow-shaped latch 140 extending from the slider end stop 34 and engaged to the slider 32 when the slider 32 is in the closed position. The latch 140 is integrally formed with the end stop 34, and the slider 32 is initially injection molded with an elongated cavity 142 having a shape generally corresponding to the shape of the latch 140. The transverse dimension of the cavity is slightly greater than the transverse dimension of the latch 140. To “activate” the tamper-evident feature, the slider 32 is moved to the closed position such that the latch 140 is inserted into the cavity 142 and the barb-like head 144 of the latch 140 snappingly engages a shoulder 146 deep within the cavity 142. The latch head 144 is sufficiently flexible to allow the latch 140 to be inserted in the cavity 142 and, yet, its barb-like shape prevents the latch 140 from subsequently being extracted from the cavity 142. The installed latch 140 is depicted in FIGS. 14 a and 14 c. To allow the slider 32 to be moved away from its closed position, the slider 32 is simply grasped and moved away from the closed position with sufficient force to break the latch 140 away from the end stop 34 as shown in FIGS. 14 b and 14 d. The latch 140 remains captured within the cavity 142 of the slider 32.
  • [0096]
    As shown in FIGS. 15 a-d, an arrow-shaped latch 150 may alternatively extend from the slider 32 and be engaged to the end stop 34. The latch 150 is inserted into a cavity 152 within the end stop 34 and snappingly engaged to a shoulder 154 within the cavity 152. In response to forcing the slider 32 away from its closed position, the latch 150 is broken away from the slider 32 and remains captured within the cavity 152 as shown in FIGS. 15 b and 15 d.
  • [0097]
    Referring to FIGS. 16 a-d, there is shown a tamper-evident feature in the form of a U-shaped rigid or semi-rigid retaining element 160 extending through slots 162 in the slider 32 and dug into the zipper 22 (see FIG. 16 c) when the slider 32 is in the closed position. The U-shaped element 160 may be composed of metal or plastic. The slider 32 includes a transverse member 163 and a pair of side walls 164 and 165 extending downward from opposing longitudinal sides of the transverse member 163. The transverse member 163 rides along the upper portion of the zipper 22. The side wall 164 includes a leg 166 and a hinged wing 167. After the slider 32 is installed on the zipper 22, the wing 167 encompasses and is latched to the leg 166. The side wall 165 includes a leg and a hinged wing akin to the respective leg 166 and wing 167 of the side wall 164. The slots 162 are formed by a small gap separating the wing 167 20 from the leg 166. Further details concerning the construction of the slider 32 may be obtained from U.S. application Ser. No. 08/938,047 filed Apr. 26, 1997, entitled “High-Strength Slider for a Reclosable Bag,” and already incorporated herein by reference in its entirety.
  • [0098]
    An advantage of the tamper-evident feature in FIGS. 16 a-d is that a slider bag utilizing the slider 32 constructed as described above is already suitable for receiving the U-shaped element 160. No special features need to be added to the slider 32. Therefore, such a slider bag may be retrofitted with the U-shaped element 160 to provide the bag with a degree of tamper evidence. To allow the slider 32 to be moved away from the closed position, the U-shaped element 160 is disengaged from the zipper 22 and removed from the slider 32. To facilitate such removal of the U-shaped element, a prying tool such as a screwdriver may be inserted between the slider leg 166 and the U-shaped element 160. In an alternative embodiment, the U-shaped element 160 is replaced with a rigid element that passes through only a single slot or hole in the slider 32 and digs into the zipper 22. This rigid element is preferably provided with some sort of handle that can be manipulated by hand or with a tool to facilitate removal of the rigid element from the slider 32.
  • [0099]
    In another set of embodiments illustrated in FIGS. 17 a-c through FIGS. 20 a-b, the tamper-evident feature initially maintains a mouth portion of the plastic bag in a folded position and allows the mouth portion to be unfolded in response to removing or breaking the tamper-evident feature. The tamper-evident feature can be employed with both slider and sliderless bags.
  • [0100]
    Referring to FIGS. 17 a-c, there is shown a tamper-evident feature created by folding over the mouth portion 170 of the bag and detachably sealing the folded-over mouth portion 170 to the sides 16 and 18 of the bag along side spot seals 172 and 174. With the bag in the folded position, as shown in FIGS. 17 a and 17 b, access to the interior of the bag is restricted because even if the slider 32 is moved from the closed position to the open position, one would have difficulty getting past the fold 176 after entering the bag. In addition to providing tamper evidence, the folded-over mouth portion 170 provides a convenient handle for carrying the bag especially when the seals for attaching the folded-over mouth portion 170 are located along the sides 16 and 18. To gain access to the contents of the bag, the side seals 172 and 174 are ruptured to allow the mouth portion 170 to be unfolded as shown in FIG. 17 c.
  • [0101]
    As shown in FIGS. 18, 19 a-b, and 20 a-b, the folded-over mouth portion 170 may alternatively be secured in the folded position by other means. For example, in FIG. 18, the folded-over mouth portion 170 is held in the folded position by the combination of a spot seal 174 along the side 18 and a flexible member, such as a price tag pin 180, passing through both the zipper 22 and the adjacent unfolded bag portion near the side 16. The price tag pin 180 performs the dual function of maintaining the mouth portion 170 in the folded position and preventing the slider 32 from being moved away from the closed position until the pin 180 is removed from the bag. The embodiment in FIG. 18 may be modified to eliminate the spot seal 174 and provide either a single price tag pin approximately midway between the sides 16 and 18 or a pair of price tag pins near the respective sides 16 and 18. Any price tag pin near the side 16 is preferably disposed adjacent to or through the slider 32 along the zipper 22 to prevent the slider 32 from being moved away from the closed position until the pin is removed from the bag.
  • [0102]
    In FIGS. 19 a-b, the folded-over mouth portion 170 is secured in the folded position by one or more spot seals 190 and 192 detachably sealing the bag panel 12 to itself. The spot seals may, for example, be peelable seals or “dirty” seals. The portion of the bag panel 12 on the mouth portion 170 is adhered to the adjacent unfolded portion of the bag panel 12. The spot seals 190 and 192 may, if desired, be strategically positioned to create a handle for carrying the bag.
  • [0103]
    In FIGS. 20 a-b, the folded-over mouth portion 170 is secured in the folded position by one or more partially removable stickers (adhesive strip) or pressure-sensitive labels 200 that attach the mouth portion 170 to the adjacent unfolded portion of the bag panel 12. One of the stickers 200 may be positioned adjacent to or over the slider 32 along the zipper 22 to prevent the slider 32 from being moved away from the closed position until the sticker is removed from the bag. A middle portion of each sticker 200 is torn away to allow the mouth portion 170 to be unfolded, while end portions of each sticker 200 remain permanently attached to the bag to provide evidence of tampering.
  • [0104]
    Each tamper-evident feature described above makes it difficult to gain access to the interior of the bag prior to removing or breaking the tamper-evident feature. In the absence of graspable upper flanges, the zipper 22 is difficult to grasp and open by hand without the use of the slider 32. Therefore, with respect to those tamper-evident features that prevent movement of the slider 32 away from the closed position, such tamper-evident features effectively inhibit tampering with the contents of the bag to a degree that is especially useful for non-food and some food applications, where tamper-proof packaging is not required but tamper-resistant packaging is nonetheless desirable. For example, the tamper-evident features in FIGS. 4 a-d, 8 a-d. 9 a-d, 10 a-d, 11 a-d, and 12 a-d are advantageous in that tamper resistance is accomplished by using a removable cardboard, paper, plastic, or foil member covering or adjacent to the slider in the closed position and adhered, stapled, friction fit, or connected in some other way to the bag to hold the member in place. If the member is composed of plastic, the plastic may be a polymer or copolymer comprised of polyethylene-based polymers, polystyrene, polypropylene, nylon, polycarbonate, or other similar materials. The polyethylene-based polymers may include low density polyethylene, linear low density polyethylene, metallocene, ethylene vinyl acetate, or other similar materials. The shrink wrap 80 in FIGS. 8 a-d is preferably composed of conventional low density polyethylene. The plastic tab 120 in FIGS. 12 a-d is formed from the same material as the bag body panels 12 and 14 because the detachable tab panels 120 a and 120 b are integrally formed with the respective bag body panels 12 and 14.
  • [0105]
    Further, the tamper-evident features in FIGS. 5 a-d and 6 a-d are advantageous in that tamper resistance is accomplished by using a conventional price tag pin anchored to at least the zipper 22 (FIGS. 5 a-d and 6 a-d) and optionally anchored to the slider 32 as well (FIGS. 5 a-d) so as to obstruct movement of the slider 32 away from its closed position. The tamper-evident features in FIGS. 13 a-d, 14 a-d, and 15 a-d are advantageous in that tamper resistance is accomplished by using a movable (FIGS. 13 a-d) or breakable (FIGS. 14 a-d and 15 a-d) latch releasably coupling the slider 32 to the end stop 34. The stepped element in FIGS. 7 a-h is likewise effective at providing resistance to tampering with the contents of the slider bag.
  • [0106]
    Unlike the tamper-evident features in FIGS. 4 a-d through 16 a-d, the tamper-evident features in FIGS. 17 a-c, 18, 19 a-b, and 20 a-b do not rely upon preventing movement of the slider 32 away from its closed position. Rather, the tamper-evident features in FIGS. 17 a-c, 18, 19 a-b, and 20 a-b rely upon securing the bag mouth in a folded position and would still be effective in the absence of the slider 32 and the zipper 22. Therefore, unlike the other tamper-evident features, the tamper-evident features in FIGS. 17 a-c, 18, 19 a-b, and 20 a-b may be applied to virtually any type of bag. If, however, a slider bag is employed, it is contemplated that the tamper-evident features of FIGS. 4 a-d through 16 a-d can be combined with the tamper-evident features in FIGS. 17 a-c, 18, 19 a-b, and 20 a-b so as to both secure the bag mouth in a folded position and prevent movement of the slider away from its closed position until the appropriate tamper-evident feature is broken or removed. Examples of bags combining multiple tamper-evident features is illustrated in FIGS. 18 and 20 a-b.
  • [0107]
    While the present invention has been described with reference to one or more particular embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present invention. Each of these embodiments and obvious variations thereof is contemplated as falling within the spirit and scope of the claimed invention, which is set forth in the following claims.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US880909 *Feb 14, 1907Mar 3, 1908William R OnealEnvelop-seal.
US1992152 *Aug 20, 1934Feb 19, 1935Seal O Sac Canada LtdTobacco pouch
US2107216 *Apr 22, 1936Feb 1, 1938Rogers Harry LReceptacle and closure therefor
US2111079 *Jun 3, 1936Mar 15, 1938SkluthPurse or the like
US2394335 *Feb 24, 1944Feb 5, 1946Shapiro Joseph MBag for garbage and the like
US2506311 *Sep 11, 1946May 2, 1950Reynolds Metals CoBag pouch
US2978769 *Jul 7, 1958Apr 11, 1961Talon IncPlastic bag or container
US3078897 *Jun 20, 1961Feb 26, 1963Rifkin Arnold STransit bag
US3122807 *Jul 22, 1960Mar 3, 1964Edgar M AusnitSlider for a pouch and the like
US3172443 *Feb 19, 1962Mar 9, 1965Ausnit StevenPlastic fastener
US3226787 *May 17, 1962Jan 4, 1966Ausnit StevenDouble extruded fastener strips
US3313471 *May 14, 1965Apr 11, 1967Avery Products CorpReclosable or wall hanging container
US3368740 *Jan 17, 1967Feb 13, 1968Tower Packaging CompanySheet material with film tear line
US3371696 *Oct 22, 1965Mar 5, 1968Ausnit StevenReclosable bags with rib and groove elements formed of different materials
US3425469 *Apr 6, 1966Feb 4, 1969Steven AusnitContainer with force differential flexible fastener
US3425618 *Dec 4, 1967Feb 4, 1969Comet Packaging CorpLitter bag
US3565147 *Nov 27, 1968Feb 23, 1971Steven AusnitPlastic bag having reinforced closure
US3633642 *Oct 28, 1969Jan 11, 1972Karlheinz SiegelBag of plastics material sheeting
US3655503 *Jan 13, 1969Apr 11, 1972Crown Zellerbach CorpPackage of composite film with peelable, heatsealable surfaces
US3711011 *May 4, 1970Jan 16, 1973Action Packaging CorpResealable packaging device
US3722672 *May 17, 1972Mar 27, 1973Yoshida Kogyo KkSlide fastener device
US3790992 *Jun 19, 1972Feb 12, 1974Minigrip IncProfiled closing members with slide
US3938658 *Dec 17, 1973Feb 17, 1976Tower Products, Inc.Sterile pouch
US3948705 *Oct 18, 1974Apr 6, 1976Steven AusnitMethod for making multiple plastic bags with reclosable fasteners thereon
US3953661 *Jan 3, 1974Apr 27, 1976Vinylex CorporationExtrusion apparatus, process and article
US4003972 *Jul 30, 1974Jan 18, 1977Minigrip, Inc.Method of extruding tubing for fastener bags
US4189050 *Oct 4, 1976Feb 19, 1980Brdr. Schur International A/SPacking of the folding bag type
US4189809 *Nov 10, 1977Feb 26, 1980Repla International S.A.H.Fastener device and method of manufacturing
US4191230 *Apr 27, 1978Mar 4, 1980Minigrip, Inc.Integral extruded construction for bags
US4196030 *Feb 16, 1978Apr 1, 1980Minigrip, Inc.Method of making extruded construction for bags
US4246288 *Aug 9, 1979Jan 20, 1981W. R. Grace & Co.Reclosable package
US4249982 *Dec 10, 1979Feb 10, 1981Minigrip, Inc.Apparatus for making reclosable bags
US4252238 *Sep 29, 1978Feb 24, 1981Salve S.A.Package for a stack of refreshers
US4309233 *Mar 12, 1981Jan 5, 1982Yoshida Kogyo K.K.Method of manufacturing separable slide fastener
US4379806 *Mar 1, 1982Apr 12, 1983Johnson & JohnsonPressure-sensitive adhesive tape and process
US4428477 *Jan 8, 1982Jan 31, 1984Johnson & Johnson Baby Products CompanyResealable package for premoistened towellettes
US4428788 *May 14, 1982Jan 31, 1984Union Carbide CorporationFilm-tape-closure device slot cast integrated interlocking structure and extrusion method
US4430070 *Aug 11, 1981Feb 7, 1984Minigrip, Inc.Method of and apparatus for uninterruptedly assembling components for making bags
US4437293 *Nov 6, 1980Mar 20, 1984W. R. Grace & Co., Cryovac Div.Method and apparatus for making a reclosable package
US4497678 *Nov 28, 1983Feb 5, 1985The Standard Products CompanyMethod of making a laminate construction
US4498939 *Jan 3, 1983Feb 12, 1985Johnson James RMethod and apparatus for making zipper bags
US4573203 *Jun 14, 1982Feb 25, 1986Paramount Packaging Corp.Reusable plastic bag with loop handle
US4582549 *Mar 15, 1985Apr 15, 1986Minigrip, Inc.Method and apparatus for producing bag making material having reclosable fasteners
US4584201 *Feb 17, 1984Apr 22, 1986Borden, Inc.Resealable package, method of making and use
US4638913 *Aug 21, 1981Jan 27, 1987W. R. Grace & Co., Cryovac Div.Multiply package having delaminating easy open seal
US4656075 *Mar 27, 1984Apr 7, 1987Leucadia, Inc.Plastic net composed of co-extruded composite strands
US4661990 *Jan 29, 1986Apr 28, 1987Rifkin Arnold SHooded type bag seal
US4736450 *Nov 20, 1985Apr 5, 1988Minigrip, Inc.Gusseted bags with reclosure features
US4736451 *Dec 22, 1986Apr 5, 1988Minigrip, Inc.Extruded zipper having combination stabilizing and differential opening means
US4817188 *Mar 7, 1988Mar 28, 1989Minigrip, Inc.Bag with separate attached zipper and method of making
US4890935 *Aug 16, 1988Jan 2, 1990Minigrip, Inc.Leak resistant zipper
US4894975 *Mar 9, 1988Jan 23, 1990Minigrip, Inc.Method and apparatus for making reclosable bags with fastener strips in a form fill and seal machine
US4895198 *Nov 18, 1988Jan 23, 1990Samuelson Sydney WMoney organizer and carrier
US4902140 *Apr 6, 1989Feb 20, 1990Kcl CorporationDetachable handle for shipping sacks
US5005707 *Feb 22, 1989Apr 9, 1991Oscar Mayer Foods CorporationReclosable package
US5007143 *Mar 7, 1990Apr 16, 1991Mobil Oil Corp.Rolling action zipper profile and slipper therefor
US5010627 *Mar 7, 1990Apr 30, 1991Mobil Oil CorporationFoldable plastic slider and method of assembly with a plastic reclosable fastener
US5088971 *Mar 22, 1991Feb 18, 1992Mobil Oil CorporationMethod of making protruding end stops for plastic reclosable fastener
US5092684 *Mar 4, 1991Mar 3, 1992Illinois Tool Works Inc.Post-applied zipper base with grip strip
US5092831 *Oct 16, 1990Mar 3, 1992Hayssen Manufacturing Co.Method of and apparatus for opening a folded web of heat-sealable packaging material prior to formation of the web into sealed reclosable packages
US5094357 *Feb 7, 1990Mar 10, 1992Colgate-Palmolive Co.Tamper evident seal
US5100246 *Oct 9, 1990Mar 31, 1992Illinois Tool Works Inc.Pull bead and guide rails for easy open flexible containers
US5186543 *May 19, 1992Feb 16, 1993Illinois Tool Works Inc.Tear-open bag having guide strips
US5189764 *Apr 22, 1992Mar 2, 1993Mobil Oil CorporationPlastic reclosable fastener with structure for retaining slider in closed position
US5198055 *Nov 8, 1991Mar 30, 1993Reynolds Consumer Products, Inc.Method of forming recloseable packages, profiles used therein, and packages produced thereby
US5283932 *Jun 10, 1993Feb 8, 1994Mobil Oil CorporationFlexible plastic zipper slider with rigidizing structure for assembly with profiled plastic zipper
US5301395 *Jul 29, 1993Apr 12, 1994Mobil Oil CorporationPlastic reclosable fastener with structure for restraining slider in closed position and for facilitating reopening fastener
US5391136 *Dec 8, 1993Feb 21, 1995Makowka; Kenneth R.Tamper-evident sealing system for envelope and method of making same
US5405478 *Nov 22, 1993Apr 11, 1995Mobil Oil CorporationTubular plastic end stops bonded to plastic zipper
US5405629 *Feb 4, 1994Apr 11, 1995Oscar Mayer Foods CorporationMulti-seal reclosable flexible package for displaying thinly sliced food products
US5482375 *Nov 18, 1994Jan 9, 1996Mobil Oil CorporationTubular plastic end stops bonded to plastic zipper
US5486051 *Apr 11, 1994Jan 23, 1996Reynolds Consumer Products Inc.Closure arrangement having a breakaway seal
US5488807 *Jun 10, 1994Feb 6, 1996Certainteed CorporationTwo element shingle
US5492411 *Jan 18, 1995Feb 20, 1996Reynolds Consumer Products Inc.Tamper evident peelable seal
US5509735 *Jul 7, 1995Apr 23, 1996Reynolds Consumer Products Inc.Closure arrangement having a peelable seal
US5606846 *Sep 12, 1994Mar 4, 1997Moore Business Forms, Inc.Bag sealing
US5613934 *Apr 4, 1996Mar 25, 1997Reynolds Consumer Products Inc.Method of forming a tear guide arrangement
US5620256 *Aug 22, 1995Apr 15, 1997Makrauer; George A.Tamper evident security bag
US5709915 *Aug 4, 1995Jan 20, 1998Reynolds Consumer Products, Inc.Adhesive structure for heat sealing
US5711609 *Mar 20, 1997Jan 27, 1998Reynolds Consumer Product, Inc.Child resistant packaage
US5713669 *Dec 5, 1996Feb 3, 1998Tenneco PackagingPlastic bag with zipper slider captured in pocket
US5722128 *Nov 4, 1996Mar 3, 1998Dow Brands Inc.Fastener assembly with slider providing tactile and/or audible feedback
US5725312 *Sep 12, 1996Mar 10, 1998Reynolds Consumer Products, Inc.Closure arrangement having a peelable seal
US5855434 *Jan 6, 1997Jan 5, 1999Menasha Corp.Package reclosure label and package
US5867875 *Apr 16, 1998Feb 9, 1999Tenneco Packaging Inc.Foldable zipper slider with improved compression-type latch
US5875611 *Aug 10, 1998Mar 2, 1999Illinois Tool Works Inc.Offset sealing method for plastic films
US5882116 *Apr 25, 1996Mar 16, 1999Backus; AlanTamper indication device
US5896627 *Sep 26, 1997Apr 27, 1999Tenneco Packaging Inc.High-strength slider for a reclosable bag
US6010244 *Apr 21, 1999Jan 4, 2000Tenneco Packaging Inc.Vented reclosable bag
US6036364 *Jan 16, 1998Mar 14, 2000Reynolds Consumer Products, Inc.Two-piece sliding fastener arrangement for attachment to container
US6212857 *Jul 26, 1999Apr 10, 2001Illinois Tool Works Inc.Slide-zipper assembly, method of attaching slide-zipper assembly to thermoplastic film, and method of making slide-zippered packages
US6347885 *Jul 21, 2000Feb 19, 2002Reynolds Consumer Products, Inc.Reclosable package having a zipper closure, slider device and tamper-evident structure
US6357914 *Sep 22, 2000Mar 19, 2002Kraft Foods Holdings, Inc.Fastener closure arrangement for flexible packages
US6360513 *Nov 1, 1999Mar 26, 2002Sargento Foods Inc.Resealable bag for filling with food product(s) and method
US6364530 *Jun 12, 2000Apr 2, 2002Reynolds Consumer Products, Inc.Resealable package having a slider device and void arrangement
US6712509 *Mar 21, 2002Mar 30, 2004Pactiv CorporationReclosable bag having tamper-evident member attached to body panels along a line of weakness located below the rib and groove profiles of the bag zipper
US7008106 *Nov 7, 2002Mar 7, 2006Pactiv CorporationReclosable bag having tamper-evident member removable from the bag along a line of weakness located below the bag zipper
US20020015537 *Mar 12, 2001Feb 7, 2002Sargento Foods Inc.Resealable bag for filling with food product (s) and method
USRE34554 *Dec 11, 1991Mar 1, 1994Minigrip, Inc.Bags with reclosable plastic fastener having automatic sealing gasket means
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7972064Jul 5, 2011Cti Industries CorporationOne way valve and container
US8100285Jan 24, 2012Danielle AseffFood cooking, serving and storage device
US8266868May 29, 2008Sep 18, 2012Phillip Morris Usa Inc.Opening device for outer wrapping and method for forming
US8561378Aug 15, 2012Oct 22, 2013Philip Morris Usa Inc.Opening device for outer wrapping and method for forming
US9126724Mar 15, 2013Sep 8, 2015Exopack LlcChild-resistant zipper assemblies and packages utilizing the same
US9321560Mar 13, 2014Apr 26, 2016Reynolds Presto Products Inc.Child resistant closure system including hood arrangement for recloseable bag and methods
US20060131339 *Dec 22, 2004Jun 22, 2006Brent AndersonOne way valve for fluid evacuation from a container
US20060277737 *Jun 8, 2005Dec 14, 2006Illinois Tool Works Inc.Method for applying soft cap to slider or zipper with mounted slider
US20080230429 *Apr 1, 2008Sep 25, 2008Brent AndersonOne way valve for fluid evacuation from a container
US20080295455 *May 29, 2008Dec 4, 2008Philip Morris Usa Inc.Opening device for outer wrapping and method for forming
WO2008058418A1 *Nov 14, 2007May 22, 2008Zip Pack Ip AgReclosable bag having a security closing device
WO2014150011A1 *Mar 7, 2014Sep 25, 2014Exopack LlcChild-resistant zipper assemblies and packages utilizing the same
Classifications
U.S. Classification383/5, 383/61.2, 383/203, 383/64
International ClassificationB65D33/34, A44B19/16, B65D33/25, A44B19/26, A44B19/18, B65D33/06, B65D33/16, B65D33/14, B65D33/00
Cooperative ClassificationY10T24/2532, Y10T24/2529, Y10T24/2516, A44B19/267, Y10T24/45183, Y10T24/2534, B65D33/065, Y10T24/2593, B65D33/2591, Y10T24/2586, Y10T24/2511
European ClassificationB65D33/06B, B65D33/25C