This disclosure relates to reclosable zipper pouch. More particularly, this disclosure relates to a reclosable zipper pouch that is child resistant.
A reclosable pouch having a press to close zipper closure is easy to open for children and adults. If the pouch is intended to have contents that are potentially harmful, there is a need to provide a closure and method to increase the difficulty for children to open the pouch and yet still be easy to open for adults and senior citizens.
To improve the prior art, a reclosable package having a hidden flange is provided.
In one aspect, a reclosable package includes a first and second sidewall joined along respective side wall edges and a bottom to form a package with an open mouth. A reclosable zipper is positioned adjacent the mouth. The reclosable zipper includes a first track comprising an interlocking profile and a second track comprising a complementary interlocking profile. The first track includes a grasping flange with a free end positionable both above and below the interlocking profile and an attachment flange below the interlocking profile. The first track is attached to the first sidewall at an anchored portion on the attachment flange. The grasping flange is unattached to the first side wall between the sidewall edges. The second track is attached to the second sidewall.
In many arrangements, the grasping flange is part of a same, extruded member as the attachment flange.
In some embodiments, the grasping flange is part of a same, co-extruded member as the attachment flange.
In one or more embodiments, the grasping flange is a separate member secured to the attachment flange.
In one or more embodiments, the grasping flange is secured to the attachment flange below the interlocking profile.
In one or more embodiments, the grasping flange is secured to the attachment flange behind the interlocking profile.
In some examples, the first track includes a pair of interlocking profiles, and the second track includes a pair of complementary interlocking profiles. The grasping flange is secured to the attachment flange between each of the interlocking profiles of the first track.
In some embodiments, the second track further includes a second grasping flange with a free end positionable both above and below the complementary interlocking profile and a second attachment flange below the complementary interlocking profile. The second track is attached to the second side wall at an anchored portion on the second attachment flange. The second grasping flange is unattached to the second side wall between the side wall edges.
In another aspect, a reclosable zipper pouch is provided. The pouch includes a surrounding wall having a closed bottom, first and second opposite sides, and first and second opposing wall panels between the first and second opposite sides. An open mouth is defined by terminal ends of the first and second opposing wall panels. The surrounding wall defines an interior volume therein. A reclosable zipper closure is between the terminal ends and the closed bottom. The zipper closure provides selective access to the interior volume through the mouth. The zipper closure includes: an attachment flange having an inner surface and an outer surface; a first zipper profile member secured to the outer surface of the attachment flange and extending toward the second wall panel; the attachment flange being secured to the first wall panel along only an anchored position of the inner surface and being free of attachment to the first wall panel at a region behind the first zipper profile member; a second zipper profile member secured to the second wall panel and extending toward the first wall panel and in a location to engage the first profile member; and the first and second profile members being constructed and arranged to selectively interlock when pressed together and unlocked when forced apart. An adjustable grasping flange is integral with the attachment flange and positionable between the attachment flange and the first wall. The grasping flange has a free end, a first surface, and an opposite second surface. The grasping flange is adjustable between a hidden position and a closure-opening position. The hidden position includes the free end being located between the attachment flange anchored portion and the first zipper profile member, and the first surface being adjacent the inner surface of the attachment flange; and the closure-opening position includes the first surface of the grasping flange pulled away from the inner surface of the attachment flange.
In many example embodiments, the closure-opening position includes the free end of the grasping flange extending toward the terminal ends of the mouth.
In some embodiments, the closure-opening position includes the free end of the grasping flange extending below the terminal ends of the mouth.
In some embodiments, the fixed portion of the grasping flange is part of a same extruded member as the attachment flange.
In some embodiments, the fixed portion of the grasping flange is part of a same co-extruded member as the attachment flange.
In some example embodiments, the grasping flange includes a fixed portion secured to the inner surface of the attachment flange, and the fixed portion of the grasping flange is not axially aligned with the first zipper profile member.
In one or more embodiments, the fixed portion of the grasping flange is located between the anchored portion and the first zipper profile member.
In one or more example embodiments, the attachment flange has a profile member and an opposite wall panel end. The zipper profile member is secured to the attachment flange adjacent the profile member end, and the attachment flange is secured to the first wall at the wall panel end at the anchored portion. The anchored portion extends along a length of less than half of the attachment flange from the wall panel end toward the profile member end.
In some implementations, the zipper closure further includes a third zipper profile member extending from the outer surface of the attachment flange and extending toward the second wall panel. The third zipper profile member is spaced from the first zipper profile member. A fourth zipper profile member extends from the second wall panel and extends toward the first wall panel and in a location to engage the third profile member. The fourth zipper profile member is spaced from the second zipper profile member.
In some examples, the fixed portion of the grasping flange is located between the first zipper profile member and the third zipper profile member.
In one or more example embodiments, the zipper closure further includes a second attachment flange having an inner surface and an outer surface. The second zipper profile member extends from the outer surface of the second attachment flange. The second attachment flange is secured to the second wall panel along only an anchored portion of the inner surface of the second attachment flange and is free of attachment to the second wall panel at a region behind the second zipper profile member. A second adjustable grasping flange is integral with the second attachment flange and is positionable between the second attachment flange and the second wall. The second grasping flange has a free end, a first surface, and an opposite second surface. The second grasping flange is adjustable between a hidden position and a closure-opening position. The hidden position of the second grasping flange includes the free end of the second grasping flange being located between the second zipper profile member and the second attachment flange anchored portion; and the first surface of the second grasping flange being adjacent the inner surface of the second attachment flange. The closure-opening position of the second grasping flange includes the first surface of the second grasping flange pulled away from the inner surface of the second attachment flange.
In some examples, the closure-opening position of the second grasping flange includes the free end of the second grasping flange extending toward the terminal ends of the open mouth.
In one or more embodiments, the closure-opening position of the second grasping flange includes the free end of the second grasping flange extending below the terminal ends of the open mouth.
In one or more examples, the second grasping flange is part of a same, extruded member as the second attachment flange.
In one or more examples, the second grasping flange is part of a same, co-extruded member as the second attachment flange.
In one or more examples embodiments, the second grasping flange includes a fixed portion secured to the inner surface of the second attachment flange, and the second grasping flange is located between the anchored portion of the second attachment flange and the second zipper profile member.
In some examples, the fixed portion of the second grasping flange is not axially aligned with the second zipper profile member.
In another aspect, a method of opening a zipper closure of a reclosable zipper pouch is provided. The zipper closure has mating zipper profile members. The method includes a step of reaching into an interior of the pouch to grasp a first flange and then moving the first flange toward a mouth of the pouch. The method includes pulling the first flange in a direction away from an opposing second flange. The first flange and the opposing second flange are each secured to a mated zipper profile member. The method also includes the step of opening the zipper closure by pulling the first flange and the opposing second flange until the mating zipper profile members are disengaged.
In example methods, the step of moving the first flange includes unfolding the first flange to move a free end of the first flange toward a position adjacent a terminal end of the mouth of the pouch.
In one example embodiment, the method includes a step of reaching into the interior of the pouch to grasp the second flange and then move the second flange toward the mouth.
In some example methods, the step of moving the second flange includes unfolding the second flange to move a free end of the second flange toward a position adjacent a terminal end of the mouth of the pouch.
A variety of examples of desirable product features or methods are set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practicing various aspects of this disclosure. The aspects of the disclosure may relate to individual features as well as combinations of features. It is to be understood that both the foregoing general description and the following detailed description are explanatory only, and are not restrictive of the claimed invention.
A. Package Overview
The surrounding wall 22 includes first and second sidewalls or wall panels 26, 28 in opposition to each other. First and second sidewall edges (sides) 30, 32 join the first and second sidewalls 26, 28. In some embodiments, the first and second sidewall edges 30, 32 can be seals connecting together the first and second sidewalls 26, 28, while in other embodiments, the first and second sides 30, 32 are not seals, but merely form the sides 30, 32.
The pouch 20 includes a closed bottom 34. The closed bottom 34, in this embodiment, is between the first sidewall edge 30 and second sidewall edge 32 and at an opposite end of the pouch as the reclosable zipper closure 24. The closed bottom 34 can be part of the same single piece of material that forms the first wall 26 and second wall 28; alternatively, the closed bottom 34 can be a seal connecting together the first wall 26 and second wall 28.
The pouch 20 has an open mouth 36 at the end of the pouch 20 that is opposite from the closed bottom 34. The mouth 36 is defined by terminal ends 38, 40 of the first and second walls 26, 28. The mouth 36 provides access to the interior volume 23, when the reclosable zipper closure 24 is in an unlocked/disengaged (open) position (
The pouch 20 can be made from many different materials, and is preferably made from a polymeric material, such as a clear (transparent) polymer to form a flexible plastic bag.
B. Example Zipper Closures
The reclosable zipper closure 24 in the pouch 20 is constructed to increase the difficulty for children to open the pouch 20 and gain access to contents of the interior volume 23, while still allowing easy opening for adults or senior citizens. Example embodiments are shown in
The reclosable zipper closure 24 is typically positioned adjacent the mouth 36. The zipper closure 24 includes a first track 42 having an interlocking profile in the form of a first zipper profile member 44.
The reclosable zipper closure 24 further includes a second track 46. The second track 46 has a complementary interlocking profile in the form of a second zipper profile member 48. The first profile member 44 and the second profile member 48 are constructed and arranged to selectively interlock when pressed together and unlock (see
The first zipper profile member 44 and the second zipper profile member 48 have complementary shapes such that they will interlock or engage with each other in the form of a “press to fit” closure. While many different embodiments for such interlocking profiles are possible, in the example embodiment shown herein, the first zipper profile member 44 is in the form of a stem 52 having a head 54. The second zipper profile member 48 is in the form of a pair of legs 56, 57 with an opening therebetween. To engage the first zipper profile member 44 with the second zipper profile member 48, the head 54 is pushed between the legs 56, 57, which then hold the head 54 in place as the legs 56, 57 tuck under the head 54 and at the stem 52. Many different embodiments are possible.
The first track 42 further includes a first flange 60. As will be apparent from the description that follows, the first flange 60 operates as a grasping flange 61 because, in use to open the zipper closure 24, it is grasped. The first flange 60 has a free end 74 that is positionable both above the first profile member 44 and below the first profile member 44. By the term “above”, it is meant that the free end 74 of the first flange 60 is positioned between the terminal ends 38, 40 defining the mouth 36 and the first zipper profile member 44.
The first track 42 further includes an attachment flange 64. The attachment flange 64 has an outer surface 68 facing the interior volume 23 of the pouch 20 and an opposite inner surface 66 facing the first side wall 26.
The first zipper profile member 46 projects from the outer surface 68 of the attachment flange 64. In many embodiments, the first zipper profile member 46 is a same extruded piece of material as the attachment flange 64.
The attachment flange 64 is secured to the first sidewall 26 only along an anchor portion 70. The anchor portion 70 will typically be located on the inner surface 66 of the attachment flange 64. The attachment flange 64 is free of attachment to the first wall panel 26 at a region behind the first zipper profile member 44. By the term “behind,” it is meant the region of the attachment flange 64 that is in axial alignment with a longitudinal axis 75 (
The attachment flange 64 includes a profile member end 102 and an opposite wall panel end 104. The first zipper profile member 44 extends from the attachment flange 64 adjacent the profile member end 102. The attachment flange 64 is secured to the first wall panel 26 at the wall panel end 104 at the anchored portion 70. The anchored portion 70 extends along a length of less than half of the attachment flange 64 from the wall panel end 104 toward the profile member end 102. Many other variations are possible.
The second zipper profile member 48 is secured to the second wall panel 28 and extends toward the first wall panel 26 in a location to engage the first profile member 44. The second zipper profile member 48 can be part of a second flange 62, which is secured to the second wall panel 28 with a heat seal or adhesive.
The grasping flange 61 is integral with the attachment flange 64. By “integral with”, it is meant that the grasping flange 61 is either the same, extruded or co-extruded piece of material as the attachment flange 64, or it is a separate piece of material that is permanently secured, attached, or fixed to the attachment flange 64. Various techniques for making the grasping flange 61 and attachment flange 64 are described in Section C, below.
As mentioned above, the grasping flange 61 has free end 74, which is unattached or free of any connection with the first side wall 26 between the sidewall edges 30, 32. In embodiments in which the grasping flange 61 is a separate piece of material that is secured to the attachment flange 64, the grasping flange 61 is completely unattached and free of connection with the first side wall 26, between the sidewall edges 30, 32. In preferred embodiments, the grasping flange 61 is secured at the sidewall edges 30, 32, and at those locations, the grasping flange 61 is attached to both the first side wall 26 and second side wall 28.
The grasping flange 61 has a first surface 50 and an opposite second surface 51. The free end 74 is at a terminal end of the grasping flange 61 between the first surface 50 and second surface 51.
In embodiments (i.e.,
The grasping flange 61 is “adjustable.” By the term “adjustable,” it is meant that the grasping flange 61 is movable between a hidden position (
In the closure-opening position, the first surface 50 of the grasping flange 61 is pulled away from the inner surface 66 of the attachment flange 64. In some embodiments (
In
When the materials of the first track 42 and second track 46 are made from a plastic polymer material, typically the anchored portion 70 between the attachment flange 64 and the bag side wall 26 is provided by either a heat seal, or an adhesive bond. Similarly, in embodiments (i.e.,
In embodiments (i.e.,
In the embodiment shown in
In the configuration of
Still in reference to
In the embodiment of
In reference now to the embodiment of
In particular, and still in reference to
The second grasping flange 87 is integral with the second attachment flange 90 and is positionable between the second attachment flange 90 and the second wall panel 28. In this embodiment, the second grasping flange 87 is shown a part of a same extruded member as the attachment flange 90. The second grasping flange 87 has a free end 100, a first surface 97, and an opposite second surface 98. The second grasping flange 87 is free of attachment to the second side wall 28 between the sidewall edges 30, 32. In preferred embodiments, the second grasping flange 87 is secured at the sidewall edges 30, 32, and at those locations, the second grasping flange 87 is attached to both the first side wall 26 and second side wall 28.
The second grasping flange 87 is adjustable between a hidden position and a closure-opening position. The hidden position is shown in
In the closure-opening position, the first surface 97 of the second grasping flange 87 is pulled away from the inner surface 92 of the second attachment flange 90. In the embodiment shown in
In other embodiments, the second grasping flange 87 can be a separate piece of material that is secured, attached, or fixed to the attachment flange 90 at a fixed portion secured to the inner surface 92 of the second attachment flange 90, such as shown in
It should also be appreciated that the inclusion of second attachment flange 90 and second grasping flange 87 can be incorporated into the embodiment of
The above arrangements can be used in a method of opening a zipper closure of a reclosable zipper pouch, such as the zipper closure 24 of reclosable zipper pouch 20. The method includes, first, reaching into the interior 23 of the pouch 20 to grasp first flange 60. The first flange 60 can be in the form of grasping flange 61. The step can include moving the first flange 60 toward the mouth 36 of the pouch 20.
The method can further include pulling the first flange 60 in a direction away from an opposing second flange 62. The first flange 60 and the opposing second flange 62 are each secured to a mated zipper profile member 44, 48, respectively.
The method can also include opening the zipper closure 24 by pulling the first flange 60 and the second flange 62 until the mating zipper profile members 44, 48 are disengaged.
The step of moving the first flange 60 includes unfolding the first flange 60 to move a free end 74 of the first flange 60 toward a position adjacent terminal ends 38, 40 defining the mouth 36 of the pouch 20.
The method may further include a step of reaching into the interior 23 of the pouch 20 to grasp a second grasping flange 87 and then moving the second grasping flange 87 toward the mouth 36.
The step of moving the second grasping flange 87 can include unfolding the grasping flange 87 to move a free end 100 of the second grasping flange 87 toward a position adjacent the terminal ends 38, 40 of the mouth 36 of the pouch 20.
C. Example Methods for Making the Grasping Flange and Attachment Flange
For any of the above embodiments, there are a variety of ways of attaching the grasping flange 61 to the remaining portion of the zipper profile, such as the attachment flange 64. These methods also apply to the grasping flange 87 and the attachment flange 90.
One method includes extruding the grasping flange as part of the zipper track 42, so that the extruded web includes: the attachment flange 64, the profile member 44, and the grasping flange 87. After extrusion, the grasping flange 87 is folded over.
Another method includes extruding the grasping flange as part of the zipper track 42, so that the extruded web includes: the attachment flange 64, the profile member 44, and the grasping flange 87, but in this case, the grasping flange 87 is extruded at an angle toward the attachment flange anchor portion 70. Because the grasping flange 87 is extruded at the angle, there is no need to fold the grasping flange.
Another method includes co-extruding the grasping flange with the rest of the zipper track 42. The extruded web includes: the attachment flange 64 and the profile member 44, while the grasping flange 87 is co-extruded at an angle toward the attachment flange anchor portion 70.
Another method includes making the grasping flange 87 as a separate piece from the rest of the zipper track 42 (attachment flange 64 and profile member 44) and then heat sealing the grasping flange 87 to the attachment flange 64 at an angle toward the attachment flange anchor portion 70.
Another method includes making the grasping flange 87 as a separate piece from the rest of the zipper track 42 (attachment flange 64 and profile member 44) and then adhesively bonding the grasping flange 87 to the attachment flange 64 at an angle toward the attachment flange anchor portion 70.
The above description represents example principles of this disclosure. Many embodiments can be made applying these principles.
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