EP3693288A1

EP3693288A1 - Zipper closure and package using the same

Info

Publication number: EP3693288A1
Application number: EP20156329.3A
Authority: EP
Inventors: Marcin Pawelak
Original assignee: Elplast Europe Sp Z O O
Current assignee: Elplast Europe Sp Z O O
Priority date: 2019-02-08
Filing date: 2020-02-10
Publication date: 2020-08-12
Anticipated expiration: 2040-02-10
Also published as: EP3693288B1; EP3693288C0

Abstract

A zipper closure (20) for use in a package includes first (28) and second closure strips (30). Each of the first and second closure strips includes at least one closure profile (36, 38, 56, 58) and a flange (30, 50). The flange (30) of the first closure strip includes outer (32) and inner flange portions (34). The outer flange portion (32) of the first closure strip encompasses and is integrally connected to the inner flange portion (34) of the first closure strip at a bending point (40). The inner flange portion of the first closure strip includes the at least one closure profile (36, 38). The inner flange portion of the first closure strip has a length less than the length of the outer flange portion of the first closure strip. The closure profile of the first closure strip is located between an open end of the inner flange portion and the bending point.

Description

CROSS-REFERENCE TO RELATED APPLICATION

FIELD OF THE INVENTION

The present invention relates generally to a zipper closure for opening and closing a bag or package. More specifically, the zipper closure of the present invention protects against unauthorized opening.

BACKGROUND OF THE INVENTION

Recloseable zipper closures or fasteners that are attached to a bag or package have existed for years. Some recloseable zipper closures or fasteners use strips that are opened by pulling the strips apart and closing them by pressing them together. Other recloseable zipper closures or fasteners use slider mechanisms that open and close the bag or package.
The recloseable bags or packages may contain items therein at the point of sale. Some bags or packages contain items that may not be suited for certain individuals, especially children. Some recloseable arrangements are relatively easy to open. Some recloseable arrangements make opening the bag or the package very difficult, but such arrangements can lead to vigorous attempts to open that can potentially rupture the bag or package.
It would be desirable to have recloseable zipper closures that assist in preventing or inhibiting unauthorized opening of the bag or package, while still performing all of the desired properties of a recloseable zipper closure. It would also be desirable to have such recloseable zipper closures that are simple and efficient to manufacture, and can be easily and cost efficiently applied to bags and packages.

SUMMARY OF THE INVENTION

To alleviate the above problems or at least meet the above desires, according to a first aspect, the present invention provides a zipper closure for use in a package includes a first closure strip and a second closure strip. The first closure strip includes at least one closure profile and a flange. The second closure strip includes at least one closure profile and a flange. The flange of the first closure strip includes an outer flange portion and an inner flange portion. The outer flange portion of the first closure strip encompasses and is integrally connected to the inner flange portion of the first closure strip at a bending point. The inner flange portion of the first closure strip includes the at least one closure profile. The at least one closure profile of the first closure strip and the at least one closure profile of the second closure strip are configured to interlock with each other. The at least one closure profile of the first closure strip is located between an open end of the inner flange portion of the first closure portion and the bending point. In a preferred embodiment the inner flange portion of the first closure strip has a length less than the length of the outer flange portion of the first closure strip.
According to a second aspect, the present invention provides a package including first and second opposing body panels, fixedly connected to each other along a pair of sides and a bottom bridging the pair of sides, and a zipper closure, according to the first aspect of the present invention, the zipper closure extending along a mouth formed opposite the bottom.
A zipper closure according to the invention may comprise one or more of the following features that:

each of the at least one closure profile of the first closure strip and the second closure strip comprises a plurality of closure profiles;
the length of the inner flange portion of the first closure strip is about 30 to about 80 percent of the length of the outer flange portion of the first closure strip;
the length of the inner flange portion of the first closure strip is about 40 to about 60 percent of the length of the outer flange portion of the first closure strip;
the inner flange portion of the first closure portion is bent towards the flange of the second closure strip;
the flange of the second closure strip includes an outer flange portion and an inner flange portion, the outer flange portion of the second closure portion encompassing and being integrally connected to the inner flange portion of the second closure portion at a bending point, the inner flange portion of the second closure strip including the at least one closure profile;
the inner flange portion of the second closure strip has a length less than the length of the outer flange portion of the second closure strip;
the length of the inner flange portion of the second closure strip and the length of the outer flange portion of the second closure strip are substantially the same;
the first and second closure strips include reinforcing notches;
the flanges of the first and second closure strips include flange extensions;
the inner flange portion and the outer flange portion are at an angle of from about 15 to about 50 degrees with respect to each other;
one of the at least one closure profiles is a female profile with a cross-section being U-shaped having ends of its arms being bent inward, and the other one of the at least one closure profiles is a male profile with a cross-section being arrowhead-shaped;
one of the first and second closure strips includes a plurality of female closure profiles and the other of the first and second closure strips includes a plurality of male profiles;
each of the first and second closure strips includes a male closure profile and a female closure profile;
the at least one closure profile of the first closure strip is a plurality of closure profiles, the bending point being located between a first one of the plurality of closure profiles of the first closure strip and a second one of the plurality of closure profiles of the first closure strip; and/or
wherein the at least one closure profile of the first closure strip and the at least one closure profile of the second closure strip are configured to be unlocked by grasping and moving the second closure strip and the inner flange portion of the first closure strip from each other;

The above summary is not intended to represent each embodiment or every aspect of the present invention. Additional features and benefits of the present invention are apparent from the detailed description and figures set forth below.

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:

FIG. 1A shows a cross-sectional view (without cross-hatching for better clarity) of a zipper closure according to an embodiment of the present invention.
FIG. 1B shows a cross-sectional view of the zipper closure of FIG. 1A being used in a polymeric bag or package according to an embodiment.
FIG. 1C shows a perspective view of the zipper closure of FIG. 1A and the entire polymeric bag or package of FIG. 1B.
FIG. 2A shows a cross-sectional view of a zipper closure according to another embodiment of the present invention.
FIG. 2B shows a cross-sectional view of the zipper closure of FIG. 2A being used in a polymeric bag or package according to an embodiment.
FIG. 3A shows a cross-sectional view of a zipper closure according to a further embodiment of the present invention.
FIG. 3B shows a cross-sectional view of the zipper closure of FIG. 3A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 3C shows a cross-sectional view of the zipper closure of FIG. 3A being used in a polymeric bag or package according to another embodiment of the present invention.
FIG. 4A shows a cross-sectional view of a zipper closure according to yet another embodiment.
FIG. 4B shows a cross-sectional view of the zipper closure of FIG. 4A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 5A shows a cross-sectional view of a zipper closure according to a further embodiment.
FIG. 5B shows a cross-sectional view of the zipper closure of FIG. 5A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 6A shows a cross-sectional view of a zipper closure according to another embodiment.
FIG. 6B shows a cross-sectional view of the zipper closure of FIG. 6A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 6C shows a cross-sectional view of the zipper closure of FIG. 6A being used in a polymeric bag or package according to another embodiment of the present invention.
FIG. 7A shows a cross-sectional view of a zipper closure according to another embodiment of the present invention.
FIG. 7B shows a cross-sectional view of the zipper closure of FIG. 7A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 7C shows a cross-sectional view of the zipper closure of FIG. 7A being used in a polymeric bag or package according to another embodiment of the present invention.
FIG. 8A shows a cross-sectional view of a zipper closure according to yet another embodiment of the present invention.
FIG. 8B shows a cross-sectional view of the zipper closure of FIG. 8A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 9A shows a cross-sectional view of a zipper closure according to a further embodiment.
FIG. 9B shows a cross-sectional view of the zipper closure of FIG. 9A being used in a polymeric bag or package according to an embodiment of the present invention.
FIG. 10A is the first step of a sequence for opening the zipper closure of FIG. 1A according to a method.
FIG. 10B is the second step of a sequence for opening the zipper closure of FIG. 1A according to a method.
FIG. 10C is the third step of a sequence for opening the zipper closure of FIG. 1A according to a method.
FIG. 10D is the fourth step of a sequence for opening the zipper closure of FIG. 1A according to a method.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. Details shown or described in relation to one embodiment may be implemented in other embodiments that may or may not be disclosed herein. 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 scope of the invention as defined by the appended claims.

DETAILED DESCRIPTION

Referring to FIG. 1A, a zipper closure 20 is shown in a cross-sectional view according to an embodiment of the present invention. For improved clarity, the cross-sectional views have been drawn without cross-hatching. The zipper closures of the present invention are desirably formed to assist in preventing or inhibiting unauthorized opening of the bag or package. The configuration of zipper closure 20 provides a balance between an easily openable package that requires little force to open and a package with closure profiles being tightly clamped in which a vigorous opening may rupture the package.
The zipper closure 20 includes a first closure strip 28 and a second closure strip 48. The first closure strip 28 includes a flange 30, a first closure profile 36 and a second closure profile 38. The flange 30 includes a first flange portion or outer flange portion 32 and a second flange portion or inner flange portion 34. The inner flange portion 34 includes the first closure profile 36 and the second closure profile 38, which are configured to interlock with respective first and second closure profiles 56, 58 of the second closure strip 48. As shown in FIG. 1A, the inner flange portion 34 includes an inner flange section 34a that extends above the first and second closure profiles 36, 38, and an inner flange section 34b that extends between the first and second closure profiles 36, 38.
The first closure profile 36 is a male profile with a cross-section being arrowhead-shaped. The second closure profile 38 is a female profile with a cross-section that is generally U-shaped. The second closure profile 38 also includes ends of its arms 38a, 38b being bent generally inward. It is contemplated that the first and second closure profiles may be other shapes and dimensions than depicted.
By using an increased number of closure profiles in the closure strip (e.g., first and second closure profiles 36, 38 of FIG. 1A), the risk of an uncontrolled opening is diminished and simultaneously the tightness of the zipper closure is improved. Additionally, if a plurality of closure profiles is used, the closing force of the zipper closure can be increased by alternating the different closure profile types on each side of the closure strip. For example, referring still to FIG. 1A, the first closure strip 28 has the first closure profile 36 being a male closure and the second closure profile 38 being a female closure.
It is contemplated that the closure strips of the present invention may include the same type of closure profile that corresponds and interlocks with a different type of closure profile on the opposing closure strip. For example, the first closure strip may include a plurality of male closures, while the second closure strip may include a plurality of female closures.
The outer flange portion 32 encompasses and is integrally connected with the inner flange portion 34 at a bending point 40. In the orientation of FIG. 1A, the bending point 40 is slightly below the first closure profile 36. The first and second closure profiles 36, 38 of FIG. 1A are located between an open end 46 of the inner flange portion 34 and the bending point 40.
In a process, the outer flange portion 32 and the inner flange portion 34 are formed and then bent so as to be located in their respective positions of FIGS. 1A, 1B. As shown in FIG. 1A, the inner flange portion 34 and the outer flange portion 32 are generally at an angle B of from about 5 to about 60 degrees and, more specifically, from about 15 to about 50. The inner flange portion 34 and the outer flange portion 32 are typically at an angle B of from about 25 to about 40 degrees.
The length of the inner flange portion 34 is shorter than the length of the outer flange portion 32 as shown in FIG. 1A. Having the length of the inner flange portion 34 being shorter than the length of the outer flange portion 32 makes opening of the zipper closure 20 more difficult, especially for children. By making the inner flange portion 34 with the first and second profile closures 36, 38 shorter, it also makes it more difficult for a child to locate the correct flange portion to open the bag or package since the shorter inner flange portion is relatively hidden as compared to the longer outer flange portion.
The length of an outer flange portion is generally from about 15 to about 30 mm and, more specifically, from about 18 to about 25 mm. The length of an inner flange portion is generally from about 8 to about 14 mm and, more specifically, from about 10 to about 12 mm. The length of the inner flange portion is generally from about 30 to about 80 percent of the length of the outer flange portion. More specifically, the length of the inner flange portion is generally from about 40 to about 70 percent of the length of the outer flange portion. The length of the inner flange portion is typically from about 40 to about 60 percent of the length of the outer flange portion.
As shown in FIG. 1B, the inner flange portion 34 is even less accessible because it is bent and located in close proximity to a flange 50 of the second closure strip 48. The position of the inner flange portion 34 of the first closure strip 28 in FIG. 1B is a child-resistant position.
Reinforcing notches may be optionally added to the zipper closures of the present invention. The reinforcing notches assist in making the zipper closures more resistant to the forces occurring during repeated opening and closing of the bags or packages. The reinforcing notches also can assist a user in opening the bag or package by providing an improved gripping area.
Referring back to FIG. 1A, reinforcing notches 42a are located on an inner surface 32a of the outer flange portion 32, while reinforcing notches 42b are located on a surface 34c of the inner flange portion 34.
The second closure strip 48 of the zipper closure 20 includes the flange 50, the first closure profile 56 and the second closure profile 58. As shown in FIG. 1A, the flange 50 of the second closure strip 48 includes a flange section 50a that extends above the first and second closure profiles 56, 58, and a flange section 50b that extends between the first and second closure profiles 56, 58. Reinforcing notches 42c are located on an inner surface 50c of the flange 50.
It is contemplated that the closure strips of the present invention may be formed without any reinforcing notches. It is also contemplated that, if used, the reinforcing notches may be formed in a different number and/or location than shown in FIG. 1A.
The outer flange portion 32 of the first closure strip 28 includes an exterior or outer surface 32b that is adapted to be attached (e.g., heat-sealed) with a bag or package. The flange 50 of the second closure strip 48 includes an exterior or outer surface 50d that is adapted to be attached (e.g., heat-sealed) with a bag or package.
In another method, the zipper closure may be attached to an inner surface of a bag or package by using an adhesive. In a non-limiting example, the adhesive may be in the form of an adhesive layer.
In another method, the location where the zipper closure is heat-sealed with the package may also be covered with an adhesive layer (e.g., an adhesive layer with adhesive notches). The use of the adhesive layer may additionally strengthen the attachment or joint between the zipper closure and the package.
A non-limiting example of a zipper closure being attached to a bag or package is shown in FIG. 1B. FIG. 1B depicts the zipper closure 20 being attached to first and second opposing body panels 70, 72 to form a bag or package 10. Specifically, the exterior surface area 32b of the outer flange portion 32 is attached to the first body panel 70, while the exterior surface 50d of the flange section 50a is attached to the second body panel 72 in forming the bag or package 10. As shown in FIG. 1B, the attachments to the first and second body panels 70, 72 are performed at the respective top portions of the first and second closure strips 28, 48 (i.e., at a location away from the profiles). The attachment may be performed using, for example, heat sealing or adhesives.
Referring to FIG. 1C, the entire bag or package 10 is shown with the zipper closure 20. The bag or package 10 includes the first and second opposing body panels 70, 72 (only the first body panel 70 is shown in FIG. 1C) being fixedly connected to each other along a pair of sides 74, 76 and a bottom 78 bridging the pair of sides 74, 76. The bag or package 10 is provided with the zipper closure 20 extending along a mouth portion 80 formed opposite the closed bottom 78 of the polymeric bag or package.
Referring to FIGS. 2A, 2B, a zipper closure 120 includes a first closure strip 128 and the second closure strip 48. The second closure strip 48 is described with respect to FIGS. 1A, 1B. The first closure strip 128 includes a flange 130, the first closure profile 36 and the second closure profile 38. The flange 130 includes a first flange portion or outer flange portion 132 and a second flange portion or inner flange portion 134. The outer flange portion 132 and the inner flange portion 134 are of the same length.
As shown in FIG. 2A, the inner flange portion 134 includes an inner flange section 134a that extends above the first and second closure profiles 36, 38, and an inner flange section 134b that extends between the first and second closure profiles 36, 38. The outer flange portion 132 encompasses and is integrally connected with the inner flange portion 134 at a bending point 140. In the orientation of FIG. 2A, the bending point 140 is slightly below the first closure profile 36. The first and second closure profiles 36, 38 of FIG. 2A are located between an open end 146 of the inner flange portion 134 and the bending point 140.
Reinforcing notches 142a are located on an inner surface 132a of the outer flange portion 132, while reinforcing notches 142b are located on a surface 134a of the inner flange portion 134. The outer flange portion 132 of the first closure strip 128 includes an exterior or outer surface 132b that is adapted to be attached (e.g., heat-sealed) with a bag or package. The flange 50 of the second closure strip 48 includes the exterior or outer surface 50d that is adapted to be attached (e.g., heat-sealed) with a bag or package.
FIG. 2B shows the zipper closure 120 being attached to the first and second opposing body panels 70, 72 to form a bag or package 110. Specifically, the exterior surface 132b of the outer flange portion 132 is attached the first body panel 70, while the exterior surface 50d of the flange 50 is attached to the second body panel 72 in forming the bag or package 110 as shown in FIG. 2B. As discussed above, the attachment of the closures to the opposing body panels may be performed using, for example, heat sealing or adhesives.
Referring to FIGS. 3A-3C, a zipper closure 220 includes a first closure strip 228 and a second closure strip 248. The first closure strip 228 and the second closure strip 248 are similar to the first and second closure strips 28, 48, respectively, described above with respect to the closure 20 of FIGS. 1A, 1B. The first closure strip 228 includes a flange 230, the first closure profile 36 and the second closure profile 38. The flange 230 includes an outer flange portion 232, an inner flange portion 234 and a flange extension 249. The second closure strip 248 includes a flange 250, the first closure profile 56 and the second closure profile 58. The flange 250 includes a flange extension 259. The main differences between the first and second closure strips 228, 248 and the first and second closure strips 28, 48, respectively, are the flange extensions 249, 259.
FIG. 3B shows the zipper closure 220 being attached to the first and second opposing body panels 70, 72 to form a bag or package 210a. Specifically, an exterior surface 232b of the outer flange portion 232 is attached the first body panel 70, while an exterior surface area 250d of the flange 250 is attached to the second body panel 72 in forming the bag or package 210a. The attachment of the flanges 230, 250 to the opposing body panels 70, 72, respectively, extends along the entire length thereof. The flange extensions 249, 259 provide an additional surface area for sealing the zipper closure 220 to the body panels 70, 72. As shown in FIG. 3B, exterior surfaces 249a, 259a of respective flange extensions 249, 259 are attached to respective first and second body panels 70, 72. It is contemplated that the attachment may occur on less than the entire length of the flanges of the first and second closure strips. As discussed above, the attachment of the zipper closures to the opposing body panels may be performed using, for example, heat sealing and adhesives.
FIG. 3C shows an alternative embodiment of forming a package using the zipper closure 220. A package 210b is formed by attaching the zipper closure 220 to body panels 70, 72. The second body panel 72 is attached to the flange 250 at only a location spaced away from the first and second closure profiles 56, 58 (i.e., at an opposite of the flange extension 259). The first body panel 70 is attached to the flange 230 in a similar manner as described above in FIG. 3B.
Referring to FIGS. 4A, 4B, a zipper closure 320 includes a first closure strip 328 and a second closure strip 348. The first closure strip 328 includes a flange 330, a first closure profile 36 and a second closure profile 38. The flange 330 includes a first flange portion or outer flange portion 332 and a second flange portion or inner flange portion 334. The first closure strip 328 is similar to the first closure strip 28 of FIG. 1A except that the inner flange portion 334 of the first closure strip 328 is not bent towards the outer flange portion 332.
The second closure strip 348 includes a flange 350, the first closure profile 56 and the second closure profile 58. The flange 350 includes a first flange portion or outer flange portion 352 and a second flange portion or inner flange portion 354. The outer flange portion 352 encompasses and is integrally connected with the inner flange portion 354 at a bending point 340. In the orientation of FIG. 4A, the bending point 340 is slightly below the first closure profile 56. The first and second closure profiles 56, 58 of FIG. 4A are located between an open end 366 of the inner flange portion 354 and the bending point 340. The lengths of the outer flange portion 352 and the inner flange portion 354 are about the same.
FIG. 4B shows the zipper closure 320 being attached to the first and second opposing body panels 70, 72 to form a bag or package 310. Specifically, the flange 350 is attached to the first body panel 70, while the flange 330 is attached to the second body panel 72 in forming the bag or package 310. The attachment of the flanges 350, 330 to the opposing body panels 70, 72, respectively, extends along a portion of the length of the flanges 350, 330 (i.e., at ends opposite of the profiles).
It is contemplated that the attachment may extend a longer distance or a shorter distance along the length of the respective flanges. The attachment of the zipper closures to the opposing body panels may be performed using, for example, heat sealing and adhesives.
Referring to FIGS. 5A, 5B, a zipper closure 420 includes the first closure strip 328 and a second closure strip 448. The first closure strip 328 is described with respect to FIG. 4A. The second closure strip 448 includes a flange 450, the first closure strip 56 and the second closure strip 58. The flange 450 includes a first flange portion or outer flange portion 452 and a second flange portion or inner flange portion 454. The second closure strip 448 is similar to the second closure strip 348 of FIG. 4A except that the inner flange portion 454 of the second closure strip 448 has a length similar to the length of the inner flange portion 334 of the first closure strip 328.
FIG. 5B shows the zipper closure 420 being attached to the first and second opposing body panels 70, 72 to form a bag or package 410. Specifically, the flange 450 is attached to the first body panel 70, while the flange 330 is attached to the second body panel 72 in forming the bag or package 410. The attachment of the flanges 450, 330 to the opposing body panels 70, 72, respectively, extends along a portion of the length of the flanges 450, 330.
Referring to FIGS. 6A-6C, a zipper closure 520 includes a first closure strip 528 and a second closure strip 548. The first and second closure strips 528, 548 include flanges 530, 550, respectively. The first and second closure strips 528, 548 are similar to the first and second closure strips 328, 448, respectively, of FIG. 5A. The first and second closure strips 528, 548, however, include flange extensions 549, 559, respectively. The flange extensions 549, 559 function in the same manner as described above with flange extensions 249, 259.
FIG. 6B shows the zipper closure 520 being attached to the first and second opposing body panels 70, 72 to form a bag or package 510a. Specifically, the flange 550 is attached to the first body panel 70, while the flange 530 is attached to the second body panel 72 in forming the bag or package 510a. The flange extensions 549, 559 are attached to the first and second body panels 70, 72, respectively. The attachment of the flanges 550, 530 to the opposing body panels 70, 72, respectively, extends along the entire length of the flanges 550, 530.
FIG. 6C shows the zipper closure 520 being attached to the first and second opposing body panels 70, 72 to form a bag or package 510b. Specifically, the flange 550 is attached to the first body panel 70, while the flange 530 is attached to the second body panel 72 in forming the bag or package 510b. The flange extension 549 is attached to the second body panel 72. The attachment of the flange 530 to the second body panel 72 extends along the entire length of the flange 530. The attachment of the flange 550 to the first body panel 70 extends along a portion of the length of the flange 550 (i.e., at an end opposition of the flange extension 559).
Referring to FIGS. 7A-7C, a zipper closure 620 includes the first closure strip 528 and a second closure strip 648. The first closure strip 528 is described with respect to FIG. 6A. The second closure strip 648 includes a flange 650. The flange 650 includes an outer flange portion 652, an inner flange portion 654 and a flange extension 659. The second closure strip 648 is similar to the second closure strip 548 of FIG. 6A. The length of the inner flange portion 654 in FIG. 7A, however, is substantially the same as the length to the outer flange portion 652.
FIG. 7B shows the zipper closure 620 being attached to the first and second opposing body panels 70, 72 to form a bag or package 610a. Specifically, the flange 650 is attached to the first body panel 70, while the flange 530 is attached to the second body panel 72 in forming the bag or package 610a. The flange extensions 659, 649 are attached to the first and second body panels 70, 72, respectively. The attachment of the flanges 650, 530 to the first and second body panels 70, 72, respectively, extends along the entire length of the flanges 650, 530.
FIG. 7C shows the zipper closure 620 being attached to the first and second opposing body panels 70, 72 to form a bag or package 610b. Specifically, the flange 650 is attached to the first body panel 70, while the flange 530 is attached to the second body panel 72 in forming the bag or package 610b. The attachment of the flange 530 to the second body panel 72 extends along the entire length of the flange 530. The attachment of the flange 650 to the first body panel 70 extends along a portion of the length of the flange 650.
Referring to FIGS. 8A and 8B, a zipper closure 720 includes a first closure strip 728 and a second closure strip 748. The first closure strip 728 includes a flange 730, the first closure profile 36 and the second closure profile 38. The first closure strip 728 is similar to the first closure strip 328 described with respect to FIG. 5A, except that the first closure strip 728 includes a small extension 737 extending from a bending point 740.
The second closure strip 748 includes a flange 750, the first closure profile 56 and the second closure profile 58. The flange 750 includes a first flange portion or outer flange portion 752 and a second flange portion or inner flange portion 754. The inner flange portion 754 includes the first closure profile 56 and the second closure profile 58, which are configured to interlock with respective first and second closure profiles 36, 38 of the second closure strip 728. As shown in FIG. 8A, the inner flange portion 754 includes an inner flange section 754a that extends above the first and second closure profiles 56, 58, and an inner flange section 754b that extends between the first and second closure profiles 56, 58.
The outer flange portion 752 encompasses and is integrally connected with the inner flange portion 754 at a bending point 770. In the orientation of FIG. 8A, the bending point 770 is located between the first and second closure profiles 56, 58. The second closure profile 58 of FIG. 8A is located between an open end 766 of the inner flange portion 754 and the bending point 770.
FIG. 8B shows the zipper closure 720 being attached to the first and second opposing body panels 70, 72 to form a bag or package 710. Specifically, the flange 730 is attached to the first body panel 70, while the flange 750 is attached to the second body panel 72 in forming the bag or package 710. The attachments of the flanges 730, 750 to the opposing body panels 70, 72, respectively, extend along a portion of the length of the flanges 750, 730.
It is contemplated that the first and second closure strips may include at least one or exactly one closure profile, respectively, in any of the configurations of the zipper closures described above. It is also contemplated that the first and second closure strips may include more than two closure profiles in any of the configurations described above. For example, the first and second closure strips may each have three or even four closure profiles.
A non-limiting example of a closure strip having exactly one interlocked closure profile is shown in FIGS. 9A, 9B. In FIGS. 9A, 9B, a zipper closure 820 includes a first closure strip 828 and a second closure strip 848.
The first closure strip 828 includes a flange 830 and a closure profile 838. The flange 830 includes a first flange portion or outer flange portion 832 and a second flange portion or inner flange portion 834. The inner flange portion 834 includes the first closure profile 838. As shown in FIG. 9A, the inner flange portion 834 includes an inner flange section 834a that extends above the closure profile 838. The outer flange portion 832 encompasses and is integrally connected with the inner flange portion 834 at a bending point 840. In the orientation of FIG. 9A, the closure profile 838 is located between the bending point 840 and an open end 846 of the inner flange portion 834.
The second closure strip 848 includes a flange 850 and a closure profile 856. The closure profile 838 of the first closure strip 828 is configured to interlock with the closure profile 856 of the second closure strip 848.
FIG. 9B shows the zipper closure 820 being attached to the first and second opposing body panels 70, 72 to form a bag or package 810. Specifically, the flange 830 is attached to the first body panel 70, while the flange 850 is attached to the second body panel 72 in forming the bag or package 810. The attachments of the flanges 830, 850 to the first and second body panels 70, 72, respectively, extend along a portion of the length of the flanges 830, 850.
The process of opening the zipper closures of the present invention is shown in, for example, the sequence depicted in FIGS. 10A-D according to a method. The zipper closure 20 of FIG. 1A of the bag or package 10 is depicted in FIGS. 10A-D. FIG. 10A shows the bag or package 10 and the zipper closure 20 before a user begins opening the bag or package 10. FIG. 10B depicts a user using his or her fingers or thumbs to begin opening the bag or package 10. The user places or positions his or her thumbs on the inside of the shorter inner flange portion 34 and the flange 50 above the interlocked first closure profiles 36, 56 and the interlocked second closure profiles 38, 58.
Referring to FIGS. 10C, 10D, the user while gripping the shorter inner flange portion 34 and the flange 50, pulls and pivots the thumbs outwardly to open the interlocked first closure profiles 36, 56 and the interlocked second closure profiles 38, 58. The user desirably pivots the thumbs outwardly in a simultaneously fashion for an efficient opening. After the first and second profiles have been disengaged from each other (i.e., opened), then the contents of the bag or package 10 can be accessed.
If the user instead grasps the outer flange portion 32 in an attempt to open the bag or package 10, the closure profiles 36, 56 and 38, 58 will not open. Specifically, when the outer flange portion 32 is pulled, it results in the body panels or walls being parted while the zipper closure itself remains interlocked (i.e., in a closed position).
The process for opening the other zipper closures of the present invention are generally similar as described above with respect to the zipper closure 20 of FIGS. 10A-10D. For example, referring to FIGS. 4A, 4B, a user would position his or her thumbs on the insides of inner flange portions 334, 354 and then pull and pivot the thumbs outwardly (along direction of arrows A and B) to open the closure profiles 36, 56 and 38, 58. If a user pulls on outer flange portion 332 and/or outer flange portions 352, the bag or package 310 will not open. After the first and second profiles have been disengaged from each other (i.e., opened), then the contents of the bag or package 310 can be accessed.
The outer and inner flange portions may be formed by extrusion and then cooled in a water bath before being bent according to a process.
To assist in easier locating and identifying the inner flange portion(s) to grasp and pull outwardly to open the bag or package, the inner flange portion(s) of the closure profiles may include some particular markings on their respective ends. For example, the open end 46 of FIG. 1A may be marked by color or other markings to assist in locating or identifying the inner flange portion 34. An open end of the outer flange portion 48 may also be similar marked.
The zipper closures may typically be made of polymeric material. Some non-limiting examples of polymeric material of which a zipper closure may be made include, but are not limited to, polyethylene-based polymers, polystyrene, polypropylene, nylon, polycarbonate, other similar materials and combinations thereof. The polyethylene-based polymers may include, but are not limited to, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), metallocene linear low density polyethylene (mLLDPE), ethyl vinyl acetate (EVA) or combinations thereof.
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 scope of the present invention. Each of these embodiments and obvious variations thereof is contemplated as falling within the scope of the claimed invention, which is set forth in the following claims.

Claims

A zipper closure for use in a package, the zipper closure comprising:
a first closure strip comprising at least one closure profile and a flange; and

a second closure strip comprising at least one closure profile and a flange,

wherein the flange of the first closure strip includes an outer flange portion and an inner flange portion, the outer flange portion of the first closure strip encompassing and being integrally connected to the inner flange portion of the first closure strip at a bending point, the inner flange portion of the first closure strip including the at least one closure profile, the inner flange portion of the first closure strip having a length less than the length of the outer flange portion of the first closure strip,

wherein the at least one closure profile of the first closure strip and the at least one closure profile of the second closure strip are configured to interlock with each other,

wherein the at least one closure profile of the first closure strip is located between an open end of the inner flange portion of the first closure portion and the bending point.
The zipper closure according to claim 1, wherein the inner flange portion of the first closure strip including the at least one closure profile, the inner flange portion of the first closure strip having a length less than the length of the outer flange portion of the first closure strip.
The zipper closure according to claim 1 or 2, wherein each of the at least one closure profile of the first closure strip and the second closure strip comprises a plurality of closure profiles.
The zipper closure according to one or more of the preceding claims, wherein the length of the inner flange portion of the first closure strip is about 30 to about 80 percent of the length of the outer flange portion of the first closure strip, preferably about 40 to about 60 percent of the length of the outer flange portion of the first closure strip.
The zipper closure according to one or more of the preceding claims, wherein the inner flange portion of the first closure portion is bent towards the flange of the second closure strip.
The zipper closure according to one or more of the preceding claims, wherein the flange of the second closure strip includes an outer flange portion and an inner flange portion, the outer flange portion of the second closure portion encompassing and being integrally connected to the inner flange portion of the second closure portion at a bending point, the inner flange portion of the second closure strip including the at least one closure profile.
The zipper closure according to claim 6, wherein the inner flange portion of the second closure strip has a length less than the length of the outer flange portion of the second closure strip, and/or wherein the length of the inner flange portion of the second closure strip and the length of the outer flange portion of the second closure strip are substantially the same.
The zipper closure according to one or more of the preceding claims, wherein the first and second closure strips include reinforcing notches, and/or wherein the flanges of the first and second closure strips include flange extensions.
The zipper closure according to one or more of the preceding claims, wherein the inner flange portion and the outer flange portion are at an angle of from about 15 to about 50 degrees with respect to each other.
The zipper closure according to one or more of the preceding claims, wherein one of the at least one closure profiles is a female profile with a cross-section being U-shaped having ends of its arms being bent inward, and the other one of the at least one closure profiles is a male profile with a cross-section being arrowhead-shaped.
The zipper closure according to one or more of the preceding claims, wherein one of the first and second closure strips includes a plurality of female closure profiles and the other of the first and second closure strips includes a plurality of male profiles.
The zipper closure according to one or more of the preceding claims, wherein each of the first and second closure strips includes a male closure profile and a female closure profile.
The zipper closure according to one or more of the preceding claims, wherein the at least one closure profile of the first closure strip is a plurality of closure profiles, the bending point being located between a first one of the plurality of closure profiles of the first closure strip and a second one of the plurality of closure profiles of the first closure strip.
The zipper closure according to one or more of the preceding claims, wherein the at least one closure profile of the first closure strip and the at least one closure profile of the second closure strip are configured to be unlocked by grasping and moving the second closure strip and the inner flange portion of the first closure strip from each other.
A package 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; and

a zipper closure according to one or more of the preceding claims.