JP2007534445A - Tightening strip with overhanging closure element - Google Patents

Abstract

The interlocking closure device includes a pair of elongated closure elements. One of the closure elements has a first surface with a protrusion along a portion of the closure element. The other of the closure elements has a complementary surface that is recognizable by tactile sense in combination with the first surface.

Description

  The present invention relates to the connection of fastening strips, and more particularly to a connecting fastening strip having a closure element with at least one protrusion that can be used in a retractable storage bag.

  Known closure clamping devices used in thermoplastic openable containers effectively seal against the contents in the container when the clamping device is in the closed position. Such clamping devices typically have a pair of complementary closure (strip) elements extending longitudinally along the top of the opposing sides of the container. The closure elements are configured to interlock with each other when they are closed and the closure elements are easily separated when the container is opened from the outside.

One desirable feature of such a clamping device is that the user can determine the sealing state of the clamping device. For example, there is a visual indication of the tightness of the clamping device in various colors for the open closure element. Such a thing is shown by patent document 1. FIG. When the open closure elements are connected, the user can recognize the proper sealing of the container from the third limited color scheme of the overlapping element parts.
U.S. Pat. No. 4,826,441

  Other conventional techniques provide a unique tactile sensation to the container user to indicate the sealed state of the container. For example, Patent Document 2 discloses a zipper that gives an uneven feeling. The zipper has a pair of oppositely connectable ribs and a groove shape (one of the groove shapes has a plurality of spaced dents along the length). When the notched portion or the weakened portion is bent at the time of sealing due to the unevenness, the user hears an audible click sound or feels the unevenness.

  The present invention provides a clamping closure element trip for use with an openable storage container having a pair of interlocking closure elements. The fastening closure element strip takes various positions. In accordance with the present invention, the user can move the closure element strip from one position to another. The engagement surface of the closure element will be referred to as a protruding surface because of the various engagement surfaces. One aspect of the engagement surface is referred to as a hook portion. Therefore, when referring to “hook part”, it indicates one type of protrusion used in the present invention. At least one of the closure elements allows the user of the storage container to hear a click when the container is closed.

  Structurally, a closure clamping device according to the present invention is a pair of opposing, longitudinally extending strips that are in interlocking engagement with each other when fully closed. One of the closure element strips has a plurality of protrusions extending from an upper peripheral piece of the closure element strip element. The strip of the other closure element has a complementary portion that intermittently engages the protrusion when the closing pressure is applied and the closure element is fully closed. This engagement allows the user of the closure clamping device to recognize the ratchet engagement.

  In one embodiment, the strip of the first closure element has a base portion that has a pair of long first webs spaced apart extending therefrom. Each of the webs has a male hook that extends outwardly from each of the webs. The second closure element also has a pair of webs extending from the second base. The second web has a plurality of spaced apart projections that extend inwardly to allow intermittent ratchet engagement with the hook portion as the clamping device moves from an open state to a closed state.

  A closure clamping device embodying the present invention has a first male closure element having a base portion and a pair of elongated spaced apart first webs extending from the base portion. In this embodiment, each first web has a plurality of male protrusions spaced outwardly from each of the webs. The clamping device has a female closure element having a pair of second webs extending from the second base. At least one of the second webs is a female mold that extends inwardly so that it can intermittently ratchet engagement with the male projection when the clamping device moves from an open state to a closed state. It has a hook part.

  In another embodiment, the closure clamping device includes a male closure element having a single web with a serpentine shape that forms a substantially wavy surface. This configuration forms a plurality of alternating convex portions and concave portions. The device further includes complementary female closure elements having a pair of second webs, each having a female hook portion that intermittently engages a serpentine shaped protrusion.

  Other advantages and embodiments of the present invention will become apparent to those skilled in the art upon review of the following description and claims with reference to the accompanying drawings.

  In general, the present invention relates to a closure fastening strip having complementary closure elements that are coupled over a closure fastening strip having a predetermined length. The closure fastening strip takes various positions. In accordance with the present invention, the user can move the closure fastening strip from one position to another. The engagement surface of the closure element is called a surface with protrusions due to multiple engagement surfaces. Thus, the term “hook portion” refers to one type of protrusion used in the present invention. At least one of the closure elements has a protruding surface that is used to interconnect with a complementary surface of the closure element when the closure element is in the closed position. The surface with protrusions provides a ratchet engagement feel and audible sound to the user of the plastic container when a pressing force is applied to engage the protrusions that effectively close the fastening strip.

  FIG. 1 shows a thermoplastic container as a plastic openable storage bag 4 according to the present invention. The storage bag 4 is formed by folding a relatively thin plastic film at the bottom, and has a pair of opposite side surfaces 6 and 8 connected along both sides, and an opening or a mouth 9 is formed at both ends of the folded side. It is what is done. FIG. 1 shows a closure clamping device 10 having a pair of opposed closure elements 12, 14 connected to the sides 6, 8. The closure elements 12, 14 are each preferably a plastic that, together with the opening of the storage bag 4, forms together an openable and closable fastening device extending longitudinally between the ends of the facing sides 6, 8. Having an extruded strip.

  FIG. 2 is a cross-sectional view of one form of closure clamping device 10 according to the present invention. Device 10 has a first closure element 12 and a second complementary closure element 14. In the illustrated embodiment, the closure element is a plastic strip having a base connected to the side of the bag. The babe portion is indicated by reference numerals 16 and 18 in FIG. Although the closure elements 12, 14 are drawn separately and connected to a plastic film that forms the side of the bag, they may be integrally formed with the side of the bag in a conventional manner.

  The structural details of the closure elements 12 and 14 are shown in FIG. 2 and FIGS. 3A-4B. The first closure element 12 is a male element consisting of a pair of parallel and spaced webs 20, 22 that extend substantially perpendicular to the base 16. As used herein, “male” refers to a closure element or portion having a hook portion or other coupling portion that closely engages and extends generally outward. An outer closure element having an inwardly extending hook or other portion is referred to as a “female” closure element or portion. The pair of female hook portions 24 and 26 are attached to the legs facing outward. In particular, the first male hook portion 24 is at the end of the first web 20 and projects outward therefrom. In this embodiment, one of the hook portions 24 has an inwardly extending guide surface 28 that extends at least partially inward from the first web 20. In operation, the guide surface 28 serves to guide the engagement of the mating closure element female protrusion and the book member as described below. As described above, the second web 22 has a male hook portion 26 that is distal and projects outwardly therefrom. The book member includes a guide surface 39 at the tip that facilitates engagement of the mating closure element with the female projection. If necessary, the guide surface 30 may extend inwardly from the web 22 to act similarly to the guide surface 28. Further, the webs 20, 22 may each have two, three, four or more protrusions, such as protrusions 26a-26c, 24a-24c as shown in FIG. 5B. Further, as shown in FIG. 6, the projections 142a-c and 146a-c may be provided.

  The first closure element 12 also has a pair of winged guide members 32, 34 that are laterally spaced from the webs 20, 22, respectively. Preferably, the guide members 32, 34 have ends 32e, 34e, which are described in more detail below, but are aligned with the male hook portions 24, 26 when the closure element is closed. Widened outward to guide the complementary webs of the two closure elements 14.

  FIG. 2 shows details of the construction of the second female closure element 14. The closure element also has first and second webs 36, 38 that extend substantially perpendicular from the base 18 and are spaced in parallel. The first web 36 has a plurality of protrusions 40 a, 40 b, 40 c that are spaced apart and integrally formed, and each protrusion extends inward from the first web 36. Each of the protrusions 40 has a contoured surface 42a-c, each guiding the protrusion 40 to engage a corresponding male hook portion 24 of the mating closure. Similarly, the second web 38 has a plurality of female protrusions 46 a, 46 b, 46 c that are spaced inwardly extending from the second web 38. These protrusions 46 also have contoured surfaces 48a-c that guide the protrusions 46 to engage the corresponding male hook portions 26 of the mating closure element. Similarly, the protrusions 46 define a plurality of interdigital notches 50a-c in the space between adjacent protrusions. Although this particular embodiment shows three protrusions per web, each web may have two, three, four or more points as desired.

In this embodiment, closure element 14 includes fins 52 that extend from base portion 18 between webs 36 and 38. Fins 52 are provided to maintain the structure firmly and facilitate the extrusion of the closure element 18. Similarly, closure element 12 has fins extending from base 16. Furthermore, the closure elements 12, 14 may have one, two, three or more, as desired. The fins may be used in any suitable application. Furthermore, the fins may be designed to function as a color enhancement member, as described in US Pat.
U.S. Pat. No. 4,826,441

A typical size of a typical male closure element is shown in FIG. 3A (the symbols shown in the figure have the following values).

Symbol range preferred value A 0.275-0.355 0.315
B 0.099-0.169 0.134
C 0.026-0.066 0.046
D 0.135-0.215 0.175
F 0.099-0.169 0.134
G 0.013-0.023 0.018

The female closure element used with the male closure element of FIG. 3A is shown in FIG. 3B (takes the following values for a representative embodiment).

Symbol range preferred value H 0.235-0.315 0.275
I 0.108-0.178 0.143
J 0.013-0.033 0.023
K 0.012-0.022 0.017
L 0.037-0.067 0,052
M 0.023-0.053 0.038
N 0.013-0.023 0.018
O 0.013-0.023 0.018
P 0.013-0.023 0.018
Q 0,024-0.044 0.034

  In operation, the opposing closure elements 12 and 14 have substantially the sides of the container and the respective faces of the base portions 16, 18 in the direction indicated by the arrows 66, 68 shown in FIGS. 4A and 4B. A force is applied in a direction perpendicular to. Such a force is applied when the user touches the surface of the container and further compresses with his / her finger along the predetermined length of the closure elements 12,14. By this action, as shown in FIGS. 4A and 4B, the opposing male hook portions 24, 26 bend both pairs of webs so that a clearance between the hook portion and the protrusion portion can be formed. It moves while contacting the protrusions 40 and 46. Thus, the female webs 36, 38 bend outward. At the same time, each web 20, 22 of the male closure element 12 bends inward.

  When the closure element is interlocked, the male hook parts 24, 26 are successively engaged with those corresponding to the protrusions 40, 46 so that the hook parts are located in the notches in the middle of the protrusions. Thus, the closure element proceeds in the direction shown in FIG. 4B. In this way, the closure elements are sequentially joined until they are fully closed, as shown in FIG. 5A. Accordingly, ratchet engagement between the male hook and the protrusion that can be recognized by the user occurs when the closure elements become engaged with each other. Further, such ratchet engagement sounds an audible sound each time the hook part is separated from the protruding part and located in the notch between them due to the meshing of the facing webs. This sound is generated when the bending force on the hook part is released and the hook part snaps into the notch. This sound can also be easily recognized by the user during the operation of the closure element.

  Preferably, the intermittent engagement of each of the male hook portions and the ratchet engagement of the protrusions allows the closure elements to engage in combination and sufficiently seal the container. In many cases, however, the user completely closes the opposing closure elements with an audible sound, in part, from the clamping device.

  In order to open the clamping device 10, the closure elements 12, 14 are separated from each other by pulling the mouth part of a plastic container (FIG. 1). By this left pull, the male webs 20, 22 are directed inward and the female webs 36, 38 are directed outward, allowing the corresponding hook portions 24, 26 and protrusions 40, 46 to pass through. The same intermittent engagement as the ratchet engagement of the closure elements 12, 14 is also recognized by the user.

  As shown in FIGS. 1 to 5A, the webs 36 and 38 have a surface with protrusions, and the other webs 20 and 22 have a surface complementary to one protrusion. Ratchet engagement is performed when one projection engages a surface with a projection. However, as described above, the webs 20 and 22 may have a number of protrusions facing one protrusion. Thus, the surface with the protrusions engages the surface with the other protrusions as shown in FIG. 5B. FIG. 5B is another embodiment of FIGS. 1 to 5A. Each of the webs 20 and 22 has outward hook portions 24a to 24c and 26a to 26c. Each of these hook portions may be the same size, and some of the hook portions may be different sizes, such as smaller hook portions 24c, 26c. The number and size of the hooks depends on the use of the fastening strip.

  FIG. 6 shows the shape of the clamping member 110 according to the second embodiment of the present invention. In this embodiment, the female closure element 112 has an inwardly facing hook that engages the protrusion of the male closure element 114. In particular, the female closure element 112 has webs 120, 122 projecting generally outward from the base portion 116 and spaced in parallel. In this embodiment, each of the male webs 120, 122 has hook portions 124, 126 facing inward from each other at the ends. Each of the hooks 124, 126 has contoured surfaces 128, 130 to guide the hooks and close together with the corresponding male projections of the mating closure element. When required, each of the female webs 120, 122 includes two, three or more hooks as shown by hooks 124a-124c, 126a-126c shown in FIG. .

  Male closure element 114 has a base portion 118 with webs 136 and 138 extending therefrom and spaced apart. The first of the webs 136 has a plurality of spaced apart protrusions 140a-c, each extending outwardly from the first web 136. As in the case of the female closure element described above, the projections 140 are formed integrally with the first web 136 and are contoured surfaces 142a-c that guide the projections and engage with the corresponding female hooks 124. Have Similarly, the protrusions 140 define a plurality of interlocking notches 144a-c in the space between the protrusions. The second web 138 also has a plurality of protrusions 146a-c that are spaced apart from the second web 138 and extend outward. The protrusion 146a at the tip of the second web preferably has an inner elongate guide surface 148a that extends at least partially inward from the second web 138. The guide surface 148a assists in closing the protruding portion 146a together with the female hook portion to be assembled. The remaining surfaces corresponding to the protrusions 146b and 146c each have a contoured surface 148b-c to facilitate engagement with the female hook portion that mates with the protrusion 148b-c. The protrusions 146 further form a plurality of notches 150a-c that mesh with each other in the space between adjacent protrusions. In the above embodiment, each web may have two, three, four or more if desired.

  The male closure element 114 also has a single winged guide member 132, 134 that is oppositely spaced laterally from the webs 136, 138. Webs 136, 138, such as the guide members described above in connection with FIGS. 2-5, guide the female closure element webs 120, 122 to align with the male protrusions when the closure element is closed. Ends 132e and 134e that spread outward are provided.

  In the illustrated embodiment, the female closure element 112 includes fins 152 extending from the base portion 116, and the male closure elements 114 are spaced fins extending from the base portion 118 between the webs 136, 138. 160, 162 are included. Fins 152, 160, 162 are included to maintain a unitary structure and facilitate extrusion of closure elements 116, 118. The closure elements 112, 114 may have one, two, three or more fins if desired.

  The operation of the closure clamping device shown in FIGS. 6-9B is similar to that described above. Opposing closure elements 112 and 114 are substantially perpendicular to the sides of the container and the respective surfaces of the bases 116 and 118 in the direction indicated by the arrows 166 and 168 shown in FIGS. A pressing force is applied in the direction. By this action, the opposing female hooks 124 and 126 move while contacting each of the protrusions 140 and 146 that bend the two pairs of webs so that a clearance between the hook and the protrusion can be formed. This allows intermittent ratchet engagement between the hook portions 124, 126 and the corresponding portions of the protrusions 140, 146 when the hook portions are located within the notches 144, 150 formed between the protrusions. Is made. Thus, the ratchet engagement between the female hook and the protrusion, which can be recognized by the user, occurs when the closure elements are brought together. This ratchet engagement generates an audible sound each time the hook portion is separated from one of the protrusions and is positioned within the notch. As described above, the sensation of the same ratchet is perceived by the user as the closure elements 112, 114 leave.

  Another embodiment of FIGS. 6-9A is shown in FIG. 9b. Each of the webs 120, 122 includes hook portions 124a-124c, 126a-126c that face inward. Each of these hook portions may have the same size, or may have different sizes such as smaller hook portions 124c, 126c. The number and size of the hook portions depends on the manner of use of the fastening strip.

  10 and 11 to 13 show cross-sectional views of a third embodiment of the present invention. In this embodiment, the first female closure element 212 has a single web 220, 222 that is spaced outwardly extending from the base 216. Each of the webs 220, 222 has hook portions 224, 226 at the ends for mating engagement with the second male closure element 214. Each web 220, 222 may have one, two or more as desired. The second closure element 214 has a single tortuous web 236, 238 spaced apart extending out from the base 218. In this embodiment, one of the pair of first webs 236 is a wave-like winding and has a plurality of spaced apart protrusions 240a-c, each out of the first web 236. Sticking out. This serpentine shape also defines a plurality of recesses 244a-c spaced in the space between the protrusions. Similarly, the second web 238 includes protrusions 246a-c spaced apart extending outwardly from the second web 238. The shape of the second web 238 defines a plurality of recesses 250a-c spaced in the middle of the protrusions. Although the web is shown to have three ridges and corresponding depressions, other numbers of ridges and depressions can be used, for example, two ridges and depressions, four ridges and depressions, five or more. The thing of a convex part and a recessed part may be used. The convex portion is similar to the protruding portion.

  The male closure element 214 also includes a single guide member 232, 234. As described above, the guide members 232, 234 are spaced laterally from the webs 236, 238, respectively. The first closure element 212 has fins 252 extending from the base portion 216, and the second closure element 214 includes two fins 260, 262 extending from the base portion 218. Fins 252, 260, 262 can be included to maintain a unitary structure and facilitate closure element closure. The closure elements 212, 214 may include one, two, three or more fins as desired.

  As shown in FIGS. 10-13, the opposing closure elements 212 and 214 are pressed in a direction perpendicular to the respective surfaces of the base portions 216, 218 to effectively close the clamping device 210. The closure element remains in contact when the opposing female hooks 224, 226 border the ends of the tortuous webs 236, 238. This bends both tortuous 236, 238 inward to allow clearance between the hook and the tortuous web convexity. At the same time, the female webs 220, 222 bend outward and the hooks 224, 226 are intermittently engaged within the recesses 244, 250 formed in the tortuous web. With such a shape, intermittent ratchet engagement of the female hooks 224, 226 occurs when traversing the tortuous web and is easily recognized by the user. The user recognizes such intermittent engagement even when the closure element leaves. The web may also have other shapes. For example, the two webs may be twisted and mesh with each other as shown in FIGS. 20A and 20B. Similarly, the web may have a sawtooth shape as in FIG. 21 or a series of rounded convex shapes as in FIG. The web engages several times after the initial engagement. Other shapes can be used as long as the meshing points provide a leak-free closure.

  14 and 15 show another embodiment of the present invention. In this embodiment, the clamping device 310 has spaced projections or irregularities formed in one base portion of a complementary pair of closure elements. As shown, the first closure element 312 has a base portion 316 from which a pair of inner male webs 320, 326 extend, with a male hook portion 324 at the end of the inner web. 326 is bonded. The first hook portion 324 has a crown-like surface 330, while the second hook portion 326 has an inwardly facing surface 328. A pair of outer webs 332, 334 spaced laterally from the inner webs 320, 322 are longer than the inner webs 320, 322 and extend from the base portion 316. The outer webs 332, 334 may have an inclination relative to the base portion in the range of 45-90 degrees, preferably in the range of 75-90 degrees. As shown in FIG. 14, the outer webs 332, 334 are inclined relative to the base portion 316 by an angle of about 82 degrees. The webs 332, 334 desirably have a shape that facilitates movement of the webs 332, 334, such as curved ends 332a, 334a.

  The second closure element 314 also has a base portion 318 that has a pair of female inner webs 336 and 338 that have hook portions 340 and 342 at the ends of the inner web. . Each of the female hook portions has an inwardly facing surface indicated by reference numerals 344 and 346 in FIGS. 14 and 15. The base 318 of the female closure element has a male closure so as to form a plurality of convex or concave surfaces 340a-c, 346a-c that extend beyond the outer end of the base 316 of the male closure element. Longer than that of the element. The plurality of concave portions 348a-c and 350a-c are located in the middle of the convex portions. The illustrated embodiment employs three convex portions and corresponding concave portions located at both outer ends of the base portion 316, but one, two, three or more convex portions and concave portions are required if necessary. Can be used.

  To interlock the clamping devices to each other, as shown in FIG. 14, press against the opposing closure elements 314, 316 so that the outer webs 332, 334 border the corresponding innermost protrusions 332, 334 Power is applied. As shown in FIG. 14, the male and female hook portions are not yet engaged so as to engage each other. When further pressed, the outer webs 332 and 334 are bent, and the end portions 332a and 334a pass through the convex portions 340a and 346a and are located in the concave portions 348b and 350b formed between the convex portions 340a-b and 346a-b. . As shown in FIG. 15, the outer web moves stepwise until it contacts the stop surface formed on the convex portions 340c and 346c. In this position, the male and female closure elements are completely closed. When the closure element is closed as illustrated in FIG. 15, the outer webs 332, 334 are at an angle of about 50 degrees with respect to the base 316 portion. With such a shape, the user can recognize the ratchet engagement that is made by the closure elements closing each other and the outer web and the recesses formed in the recesses extending laterally. In addition, an audible sound is generated.

  Another embodiment with spaced projections or irregularities is shown in FIG. In this embodiment, the spaced projections have a sawtooth shape. In particular, closure elements 412, 414 are similar to closure elements 312, 314 described above. However, the base portion 418 has a plurality of sawtooth-shaped convex portions 440a-440c, 446a-446c. Accordingly, a plurality of concave portions 448a-448c, 450a-450c are formed adjacent to the convex portions. The outer webs 432, 434 move in stages until the web borders the top surfaces 440d, 446d.

  The closure clamping device can include other types of closure elements. As shown in FIG. 17, the closure clamping device includes a male closure element 512 and a female closure element. The male closure element has a web 520 extending from the base portion 516. The web 520 has a head portion 524 and convex portions 527 and 529. The female closure element 514 has a channel 539 and two webs 541, 543 (extending from the base portion 518). Webs 541 and 543 include protrusions 545a-545c, 547a-547c and notches 549a-549c, 551a-551c adjacent to the protrusions. The protrusion generally has a surface contoured to guide the protrusions 527, 529 to engage the notches 549a-549c, 551a-551c. This particular embodiment has three protrusions on each wall, but if desired, each wall may have one, two, four or more protrusions.

  When the closure elements are brought together, the male projections 527, 529 are intermittent with the corresponding ones of the projections 545a-545c when the projections 527, 529 are located within the notches 549a-549c, 551a-551c. Engaging. The closure elements are connected in stages until they are completely closed. Therefore, the ratchet engagement between the protrusion and the protrusion that can be recognized by the user occurs when the closure elements engage with each other. Further, when the ratchet is engaged, an audible sound is generated each time the convex portion is separated from one of the projecting portions and is positioned so as to be camped on the notch formed therebetween. The audible sound is generated when the force that bends the protrusion is released and the protrusion fits into the notch. This sound is easily recognized by a closed user.

  Another embodiment of a closure element with a plurality of protrusions is shown in FIG. The closure clamping device includes a male closure element 612 and a female closure element 614. Male closure element 612 has a web 620 extending from base portion 616. The web 620 includes a head portion 624, convex portions 627a-627c, 629a-629c, and notches 649a-649c, 651a-651c. Female closure element 614 has two webs 641, 643 extending from channel 639 and base 618. The webs 641 and 643 have protrusions 645 and 647. This particular embodiment shows three protrusions on the web, but one, two, four or more protrusions may be provided on each web if desired.

  When the closure elements close together, the male protrusions 627, 629 intermittently dissociate from the corresponding ones of the protrusions 645, 647 when the protrusions 645, 647 are located within the notches 649a-649c, 651a-651c. Engage. The closure elements are connected in stages until they are completely closed. Accordingly, the ratchet engagement of the protrusions that can be recognized by the user occurs when the closure elements engage with each other. Further, when the ratchet is engaged, an audible sound is generated each time the convex portion is separated from one of the projecting portions and is positioned so as to engage with a notch formed therebetween. The audible sound is generated when the force that bends the protrusion is released and the protrusion fits into the notch. This sound is easily recognized by the user when closing.

  The embodiment illustrated in FIG. 19 is a combination of the female closure element of FIG. 17 and the male closure element of FIG. The female closure element 714 is similar to the female closure element 514 of FIG. The male closure element 712 is similar to the male closure element 612 of FIG.

  Female closure element 714 includes two webs 741 and 743 extending from channel 739 and base 718. The webs 741 and 743 have protrusions 745 and 747 and notches 749 and 751 adjacent to the protrusions. The protrusion generally has a surface that is contoured to guide the protrusions 727, 729 to engage the notches 749, 751. This particular embodiment has three protrusions on each wall, but if desired, each wall may have one, two, four or more protrusions.

  Male closure element 712 has a web 720 extending from base portion 716. The web 720 has a head portion 724, convex portions 727 and 729, and notches 749 and 751. This particular embodiment shows three protrusions on the web, but one, two, four or more protrusions may be provided on each web if desired.

  In order to effectively close the clamping device 710 of FIG. 19, the opposing closure elements 712 and 714 are pressed in a direction perpendicular to the respective surfaces of the base portions 716, 718. The closure element comes into contact when the web 720 engages each web 741,743. The webs 741 and 743 extend outward so that intermittent engagement between the protrusion and the protrusion and intermittent engagement between the protrusion and each notch are possible. This configuration also provides intermittent ratchet engagement that can be easily recognized by the user. The user recognizes such intermittent engagement even when the closure element leaves.

  As shown in FIGS. 20A and 20B, the webs are serpentine and engage and engage each other. The closure element 810 has a first closure element 812 and a second closure element 814.

  The first closure element 812 is similar to the closure element 214 of FIGS. The first closure element 812 has a pair of serpentine webs 820, 822 spaced apart extending generally outward from the base portion 816. In this embodiment, the paired first webs 820 are serpentine, wavy, and have a plurality of spaced apart protrusions 824a-c, each protrusion being the first Projecting outward from the web 820. The serpentine shape also defines a plurality of recesses 825a-c spaced in the space between the protrusions. Also, the second web 822 has convex portions 826a-c spaced from the second web 822 to extend outward. The shape of the second web 822 also defines a plurality of recesses 827a-c spaced in the vicinity of the protrusions. The web shows three protrusions and corresponding depressions, but other numbers of protrusions and depressions, such as two protrusions and depressions, four protrusions and depressions, or five or more protrusions and depressions. May be used. The convex portion is the same as the protruding portion.

  The second closure element 814 is similar to the first closure element 812. The second closure element 814 has a pair of tortuous webs 836, 838 that are spaced apart extending generally outward from the base portion 818. In this embodiment, the pair of first webs 836 are serpentine and have a plurality of protrusions 840a-c spaced outwardly from the first web 836. The tortuous shape also defines a plurality of recesses 844a-c spaced in the space between the protrusions. The second web 838 also has convex portions 846a-c spaced from the second web 838 to extend outward. The shape of the second web 838 also defines a plurality of recesses 850a-c spaced in the vicinity of the protrusions. The web shows three protrusions and corresponding depressions, but other numbers of protrusions and depressions, such as two protrusions and depressions, four protrusions and depressions, or five or more protrusions and depressions. May be used. The convex portion is the same as the protruding portion.

  The male closure element 814 also has a pair of guide members 832, 834. As described above, guide members 832 and 834 are spaced laterally from webs 836 and 838, respectively. The first closure element 812 has fins 852 extending from the base portion 816, and the second closure element 814 has two fins 860, 862 extending from the base portion 818. Fins 852, 860, 862 are included to maintain a unitary structure and facilitate extrusion of the closure element. The closure elements 812, 814 may have one, two, three or more fins if desired.

  As shown in FIG. 20A, in order to effectively close the clamping device 810, the opposing closure elements 812 and 814 are pressed in a direction perpendicular to the respective faces of the base portions 816,818. The closure element remains in contact when the opposing female hooks 824, 826 border the ends of the tortuous webs 836, 838. The tortuous webs 836, 838 bend inward to allow intermittent engagement of the protrusions with other protrusions and intermittent engagement of the protrusions with the recesses. At the same time, each of the webs 820, 822 bends outward to allow intermittent engagement of the convex portion with other convex portions and intermittent engagement of the convex portion with the concave portion. With this configuration, the user can easily recognize intermittent ratchet engagement. The user recognizes such intermittent engagement even when the closure element leaves.

  As shown in FIG. 21, both webs have a saw-tooth shape and engage to engage each other. The closure element 910 has a first closure element 912 and a second closure element 914.

  The first closure element 912 has a pair of webs 920, 922 that are spaced apart to extend generally outward from the base portion 916. In this embodiment, the pair of first webs 920 has a plurality of spaced apart triangular protrusions 924 protruding outwardly from the first web 920. This configuration also defines a plurality of spaced apart recesses 925 in the space between the protrusions. Similarly, the second web 922 has a triangular convex portion 926 that is spaced outwardly from the second web 922. The shape of the second web 922 has a plurality of recesses 927 spaced apart adjacent to the protrusions. The web shows four protrusions and corresponding recesses, but other numbers of protrusions and recesses, such as two protrusions and recesses, three protrusions and recesses, or five or more protrusions and recesses. May be used. The convex portion is the same as the protruding portion.

  The second closure element 914 is similar to the first closure element 912. The second closure element 914 has a pair of webs 936, 938 that are spaced apart from the base portion 918 and extend generally outward. In this embodiment, the pair of first webs 936 has a plurality of triangular protrusions 940 spaced outwardly from the first web 936. This configuration also defines a plurality of recesses 944 spaced in the space between the protrusions. Similarly, the second web 938 has a triangular projection 946 spaced outward from the second web 938. The shape of the second web 938 has a plurality of spaced apart recesses 950 adjacent to the protrusions. The web shows four protrusions and corresponding recesses, but other numbers of protrusions and recesses, such as two protrusions and recesses, three protrusions and recesses, or five or more protrusions and recesses. May be used. The convex portion is the same as the protruding portion.

  The male closure element 914 also has a single guide member 932,934. As described above, the guide members 932, 934 are spaced laterally from the webs 936, 938, respectively. The first closure element 912 includes fins 952 extending from the base portion 916, and the second closure element 914 includes two fins 960, 962 extending from the base portion 918. Fins 952, 960, 962 may be included to maintain a unitary structure and facilitate extrusion of the closure element. The closure elements 912, 914 may have one, two, three or more fins if desired.

  As shown in FIG. 21, in order to effectively close the clamping device 910, the opposing closure elements 912 and 914 are pressed in a direction perpendicular to the respective faces of the base portions 916,918. The closure element remains in contact when the opposing female hooks 924, 926 border the webs 936, 938. The webs 936 and 938 bend inward to allow intermittent engagement between the convex portion and the other convex portion, and intermittent engagement between the convex portion and the concave portion. At the same time, each of the webs 920, 922 bends outward to allow intermittent engagement of the protrusions with other protrusions and intermittent engagement of the protrusions with the recesses. With this configuration, the user can easily recognize intermittent ratchet engagement. The user recognizes such intermittent engagement even when the closure element leaves.

  Triangular protrusions 924, 926, 940, 946 are designed so that the force required to close the closure clamping device is less than the force required to release the closure clamping device. In particular, during closing, the abutting triangular surface is angled by an angle that facilitates closing. Unlike the case of closing, the space between the faces of the triangular convex portions that are in contact with each other during the separation is horizontal to make it more difficult to open. The angle of the surface can be varied as required.

  As shown in FIG. 22, both webs have rounded convex portions and engage with each other so as to mesh with each other. The closure element 1010 has a first closure element 1012 and a second closure element 1014.

  The first closure element 1012 has a pair of webs 1020, 1022 that are spaced apart from the base portion 1016 and extend generally outward. In this embodiment, the pair of first webs 920 has a plurality of spaced apart triangular protrusions 924 protruding outwardly from the first web 920. This configuration also defines a plurality of spaced apart recesses 1025 in the space between the protrusions. Similarly, the second web 1022 has triangular protrusions 1026 that are spaced outwardly from the second web 1022. The shape of the second web 1022 has a plurality of recesses 1027 spaced apart adjacent to the protrusions. The web shows three protrusions and corresponding recesses, but other numbers of protrusions and recesses, such as two protrusions and recesses, four protrusions and recesses, or five or more protrusions and recesses. May be used. The convex portion is the same as the protruding portion.

  The second closure element 1014 is similar to the first closure element 1012. The second closure element 1014 has a pair of webs 1036, 1038 that are spaced apart to extend generally outward from the base portion 1018. In this embodiment, the pair of first webs 1036 has a plurality of triangular projections 1040 spaced outwardly projecting from the first web 1036. This configuration also defines a plurality of recesses 1044 spaced in the space between the protrusions. Similarly, the second web 1038 has a triangular convex portion 1046 spaced from the second web 1038 and projecting outward. The shape of the second web 1038 has a plurality of spaced apart recesses 1050 adjacent to the protrusions. The web shows three protrusions and corresponding depressions, but other numbers of protrusions and depressions, such as two protrusions and depressions, four protrusions and depressions, or five or more protrusions and depressions. May be used. The convex portion is the same as the protruding portion.

  The second closure element 1014 also has one guide member 932,934. As described above, the guide members 932, 934 are spaced laterally from the webs 936, 938, respectively. The first closure element 912 has fins 952 extending from the base portion 916, and the second closure element 914 includes two fins 960, 962 extending from the base 918. Fins 952, 960, 962 may be included to maintain a unitary structure and facilitate extrusion of the closure element. The closure elements 912, 914 may have one, two, three or more fins if desired.

  As shown in FIG. 22, the opposing closure elements 1012 and 1014 are pressed in a direction perpendicular to the respective faces of the base portions 1016 and 1018 to effectively close the clamping device 1010. The closure element remains in contact when the opposing female hooks 1024, 1026 abut the webs 1036, 1038. The webs 1036 and 1038 bend inward to allow intermittent engagement between the convex portion and the other convex portion, and intermittent engagement between the convex portion and the concave portion. At the same time, each of the webs 1020 and 1022 bends outward to allow intermittent engagement of the protrusions with other protrusions and intermittent engagement of the protrusions and recesses. With this configuration, the user can easily recognize intermittent ratchet engagement. The user recognizes such intermittent engagement even when the closure element leaves.

  FIG. 23 shows another embodiment of the present invention. In this embodiment, the clamping device 1110 has an outer web with a protruding surface that is angled relative to the base. The clamping device 1110 has a first closure element 1112 and a second closure element 1114. The first closure element 1112 has an inner web 1120, 1122 and a base portion 1116 similar to the webs 120, 122 and base portion 116 of FIG. The first closure element 1112 also has an outer web 1132, 1134 that is angled with respect to the base 1116. The outer webs 1132, 1134 are inclined with respect to the base portion in the range of 30-60 degrees, preferably 45 degrees. In FIG. 23, the outer webs 1132 and 1134 are inclined with respect to the base portion at an angle of about 45 degrees. The outer web 1132, 1134 has protruding surfaces 1140, 1146. Although this embodiment utilizes surfaces 1140 and 1146, embodiments having other surfaces such as surfaces 340 and 346 in FIGS. 14 and 15 and surfaces 440 and 446 in FIG. 16 may be used.

  Second closure element 1114 has inner webs 1121, 1123 and base portion 1117 similar to webs 20, 22 and base portion 16 of FIG. Second closure element 1114 also has outer webs 1133, 1135 that are angled relative to base portion 1117. The outer webs 1133, 1135 are inclined with respect to the base portion in the range of 30-60 degrees, preferably 45 degrees. At 23, the outer webs 1133, 1135 are inclined with respect to the base at an angle of approximately 45 degrees. The outer webs 1133 and 1135 have surfaces 1141 and 1145 with protrusions. The surface with the protrusions is configured to engage with the corresponding web.

  In this embodiment, the surface with the protrusion has a triangular protrusion. The triangular ridge is designed to adjust the degree of tactile sensation during opening and closing of the closure clamping device. In particular, the surface of the triangular convex portion that contacts during closing is inclined at an angle that provides a strong tactile sensation during closing. The face of the triangular convex portion that contacts during opening is substantially vertical to provide a moderately reduced tactile sensation during closing. You may change the angle of a surface as needed.

  The clamping device 1110 in the closed position is shown in FIG. When a pressing force is applied to the closure elements 1112, 1114, the webs come into contact with each other. The inner webs engage as described above with respect to FIGS. The outer web bends and the one projecting surface of the webs 1134, 1135 engages the other projecting surface of the webs 1134, 1135. This action enables intermittent ratchet engagement that engages each other. Thus, as the closure elements engage with each other, the user can recognize the ratchet engagement. Furthermore, such ratchet engagement generates an audible sound that can be recognized by the user while closing. Ratchet engagement can also be recognized by the user when the closure element is opened.

  FIG. 24 shows another embodiment of the present invention. In this example, the clamping device 1110 has an inner web with a protruding surface and an outer web with a protruding surface. The clamping device 1210 has a first closure element 1212 and a second closure element 1214. The first closure element 1212 has inner webs 1220, 1222 and a base portion 1216 similar to the webs 120, 122 and base portion 116 of FIG. 9B. In this embodiment, webs 1220 and 1222 are used, but other webs such as those shown in FIGS. 2 to 9A, 10 to 13, and 17 to 22 are also possible. . The first closure element 1212 may also have outer webs 1232, 1234 similar to the webs 1132, 1134 of FIG.

  Second closure element 1214 has inner webs 1236, 1238 and base 1218 similar to webs 136, 138 and base 118 of FIG. 9B. In this embodiment, webs 1220 and 1222 are used, but other webs such as those shown in FIGS. 2 to 9A, 10 to 13, and 17 to 22 are also possible. . The second closure element 1214 may also have outer webs 1233, 1235 that are similar to the webs 1133, 1135 of FIG.

  The clamping device 1110 in the closed position is shown in FIG. When a pressing force is applied to the closure elements 1212, 1214, the webs come into contact with each other. The inner webs engage as described above with respect to FIGS. 6-9A, particularly FIG. 9B. The outer web engages as described above with respect to FIG. The ratchet engagement between the inner web and the outer web can be recognized by the user as the closure elements engage with each other. Furthermore, such ratchet engagement generates an audible sound that can be recognized by the user while closing. Ratchet engagement can also be recognized by the user when the closure element is opened.

  FIG. 25 shows another embodiment of the present invention. In this embodiment, the clamping device has a protruding surface in one base of the inner web and closure element with the protruding surface. The clamping device 1310 has a first closure element 1312 and a second closure element 1314. The first closure element 1312 has inner webs 1320, 1322 and a base portion 1316 similar to the webs 1220, 1222 and base portion 1216 of FIG. In this embodiment, the webs 1320 and 1322 are employed, but embodiments employing other webs as shown in FIGS. 2 to 13 and FIGS. 17 to 22 are also possible. The first closure element 1212 also has protrusions 1340, 1346 on the base similar to the faces 440, 446 of FIG. In this embodiment, the surfaces 1340 and 1346 having protrusions are employed, but embodiments employing other surfaces as shown in FIGS. 14 and 15 are also possible.

  Second closure element 1314 has inner webs 1336, 1338 and base portion 1318 similar to webs 1236, 1238 and base portion 1218 of FIG. In this embodiment, webs 1336 and 1338 are employed, but other webs such as those shown in FIGS. 2 to 13 and 17 to 22 may be employed. The second closure element 1314 may also have outer webs 1333, 1335 similar to the webs 432, 434 of FIG.

  The clamping device 1010 in the closed position is shown in FIG. When a pressing force is applied to the closure elements 1312, 1314, the webs come into contact with each other. The inner webs engage as described above with respect to FIG. The outer web engages as described above with respect to FIG. The ratchet engagement between the inner web and the outer web can be recognized by the user as the closure elements engage with each other. Furthermore, such ratchet engagement generates an audible sound that can be recognized by the user while closing. Ratchet engagement can also be recognized by the user when the closure element is opened.

  The closure clamping device of the present invention is preferably made from a thermoplastic material such as high density polyethylene, medium pressure polyethylene or low density polyethylene, or other resin. Such a clamping device can be easily manufactured by known manufacturing methods such as extrusion using other methods and molds for manufacturing such devices. The device is manufactured as a strip for later attachment to a plastic film, or manufactured integrally with a plastic film. In the case of extrusion, the closure clamping device can be extruded with or without a flange on one or both of the closure elements, depending on the particular manufacturing method.

  The clamping device according to the present invention has various advantages. For example, a configuration having a protrusion strongly gives the user a tactile sensation. Furthermore, the present invention gives a strong tactile sensation to the user from a configuration that is closed at various points. In the invention having a large number of protrusions, it can be visually displayed with stepwise coloring. In particular, the user can recognize the degree of closing of the protruding portion and the hook portion from the color change by looking at the fastening device from the side.

  Accordingly, the first closure element having at least one projecting surface and the second closure element having a complementary mating surface for intermittent ratchet engagement with the projection surface, Closure elements that achieve the objectives are described herein. Those skilled in the art will appreciate that various modifications of the present invention can be made without departing from the spirit and scope of the present invention. Accordingly, the invention is limited only by the following claims.

FIG. 1 is a perspective view of an openable and closable container made of a thermoplastic material suitable for incorporating the present invention. FIG. 2 is a cross-sectional view of a clamping device having a closure element with at least one protrusion along line 2-2 of FIG. 1 in an open position in accordance with the present invention. FIG. 3A is a cross-sectional view of one embodiment of a male closure according to the present invention showing the dimensions of the various components of the male closure element. 3B is an exemplary female closure element according to the present invention for use with the male closure element of FIG. 3A, showing the dimensions of the various components of the female closure element. It is sectional drawing. 4A is a cross-sectional view of the clamping device of FIG. 2 in various positions. 4B is a cross-sectional view of the clamping device of FIG. 2 in various positions. 5A is a cross-sectional view of the clamping device of FIG. 2 in a fully closed position. FIG. 5B is a cross-sectional view of another embodiment of the clamping device shown in FIG. 5A. FIG. 6 is a cross-sectional view of a clamping device in an unclosed position according to a second embodiment of the present invention. 7 is a cross-sectional view of the clamping device of FIG. 6 in various positions. 8 is a cross-sectional view of the clamping device of FIG. 6 in various positions. 9A is a cross-sectional view of the clamping device of FIG. 6 in a fully closed position. FIG. 9B is a cross-sectional view of another embodiment of the clamping device of FIG. 9A. FIG. 10 is a cross-sectional view of a clamping device in an unclosed position according to a third embodiment of the present invention. 11 is a cross-sectional view of the clamping device of FIG. 10 in various positions. 12 is a cross-sectional view of the clamping device of FIG. 10 in various positions. 13 is a cross-sectional view of the clamping device of FIG. 10 in a fully closed position. FIG. 14 is a cross-sectional view of a clamping device according to a fourth embodiment of the invention in a partially closed position. 15 is a cross-sectional view of the clamping device of FIG. 14 in a fully closed position. 16 is a cross-sectional view of another embodiment of the clamping device of FIG. FIG. 17 is a cross-sectional view of another embodiment of the present invention. FIG. 18 is a cross-sectional view of another embodiment of the present invention. FIG. 19 is a cross-sectional view of another embodiment of the present invention. FIG. 20A is a cross-sectional view of another embodiment in an unclosed position. 20B is a cross-sectional view of the clamping device of FIG. 20A in a closed position. FIG. 21 is a cross-sectional view of another embodiment. FIG. 22 is a cross-sectional view of another embodiment. FIG. 23 is a cross-sectional view of another embodiment. FIG. 24 is a cross-sectional view of another embodiment. FIG. 25 is a cross-sectional view of another embodiment.

Claims (82)

  An interconnecting closure clamping device comprising a pair of opposingly extending longitudinally extending closure elements for interlocking engagement, the first closure element extending along a portion thereof with a first projecting surface And a second closure element has a complementary first surface located along a portion thereof, the first complementary surface being in a closed position and having a surface with the first protrusion. A clamping device, characterized in that the respective surfaces cause ratchet engagement when applying a pressing force to the first and second closure elements.   The clamping device according to claim 1, wherein the first closure element has a base and the surface with the first protrusion is at an angle in the range of 0-90 degrees with respect to the base. .   The clamping device according to claim 2, wherein the surface with the first protrusion forms an angle of 90 degrees with respect to the base portion.   The clamping device according to claim 3, wherein the surface with the first protrusion has a web and the surface with the protrusion is on the web.   The clamping device according to claim 4, wherein the surface with the first protrusion has a plurality of hook portions.   The clamping device according to claim 4, wherein the surface with the first protrusion has a plurality of serrated teeth.   The fastening device according to claim 4, wherein the surface having the first protrusion has a plurality of protrusions.   The fastening device according to claim 4, wherein the surface with the first protrusion has a winding shape.   The clamping device according to claim 4, wherein the first complementary surface has a protrusion.   The clamping device according to claim 4, wherein the first complementary surface has a surface with protrusions.   The fastening device according to claim 10, wherein the surface with the protruding portion has a plurality of hook portions.   The clamping device according to claim 10, wherein the surface with the protrusion has a plurality of serrated teeth.   The fastening device according to claim 10, wherein the surface with the protrusion has a plurality of protrusions.   The fastening device according to claim 10, wherein the surface with the protrusion has a winding shape.   The first closure element has two webs, the surface with the first protrusion is on one side of the web and the surface with the second protrusion is on the other side of the web The clamping device according to claim 3.   The fastening device according to claim 15, wherein the surface with the protruding portion has a plurality of hook portions.   The clamping device according to claim 15, wherein the surface with the protrusion has a plurality of serrated teeth.   The fastening device according to claim 15, wherein the surface with the protrusion has a plurality of protrusions.   The fastening device according to claim 15, wherein the surface with the protrusion has a meandering shape.   The clamping device of claim 15, wherein the first complementary surface has a protrusion.   The first complementary surface has a surface with a protrusion, the second closure element has a second complementary surface, and the second complementary surface is a surface with a protrusion. The fastening device according to claim 15, comprising:   The clamping device according to claim 21, wherein the surface with the protrusion has a plurality of hook portions.   The clamping device according to claim 21, wherein the surface with the protrusion has a plurality of serrated teeth.   The clamping device according to claim 21, wherein the surface with the protrusion has a plurality of protrusions.   The clamping device according to claim 21, wherein the surface with the protrusion has a meandering shape.   The clamping device according to claim 15, wherein the surface with the protrusion faces inward.   The clamping device according to claim 15, wherein the surface with the protrusion faces outward.   The clamping device according to claim 15, wherein the surface with the first protrusion has a different shape from the surface with the second protrusion.   The first closure element comprises a first web, a second web, a third web and a fourth web, and the surface with the first protrusion is on the first web; The second web has a surface with a second protrusion, the surface with the second protrusion forms an angle of 90 degrees with respect to the base, and the third web has a third protrusion. 4. A clamping device according to claim 3, wherein the clamping device has a surface with a portion, and the fourth web has a surface with a fourth protrusion.   30. A clamping device according to claim 29, wherein the third web is parallel to the base.   30. The clamping device of claim 29, wherein the third web is angled with respect to the base.   The clamping device according to claim 2, wherein the first closure element has a base portion, and the surface with the first protrusion is parallel to the base portion.   The clamping device according to claim 32, wherein the surface with the first protrusion is integral with the base portion.   The clamping device of claim 32, wherein the surface with the first protrusion has a plurality of serrated teeth.   The clamping device according to claim 32, wherein the surface with the first protrusion has a plurality of protrusions.   The clamping device according to claim 32, wherein the second closure element comprises a web and the first complementary surface is located along the web.   The clamping device of claim 32, wherein the first closure element includes a surface with a second protrusion.   38. The clamping device according to claim 37, wherein the surface with the second protrusion is parallel to the base.   38. The clamping device of claim 37, wherein the second closure element has a web and a second complementary surface along the web.   38. The clamping device of claim 37, wherein the surface with the second protrusion is at an angle of 90 degrees with respect to the base.   37. The clamping device of claim 36, wherein the first complementary surface has a protrusion.   A container having two opposing sides and an interconnecting clamping device, wherein the clamping device is fastened to a first side that is one of the sides, and a second side that is the other of the sides A second closure element to be fastened, the first closure element having a first projecting surface along the first closure element, and the second closure element being one of the closure elements; Having a first complementary surface along the portion, and the first complementary surface is connected in a closed position so as to mesh with the surface having the first protrusion, and the surfaces are separated from each other. A container which is engaged with a ratchet when reaching a closed position from a closed position.   43. A container according to claim 42, wherein the first closure element has a base portion and the surface with the first protrusion is at an angle in the range of 0 to 90 degrees with respect to the base portion.   44. A container according to claim 43, wherein the surface with the first protrusion forms an angle of 90 degrees with the base portion.   45. A container according to claim 44, wherein the first closure element comprises a web and the surface with the first protrusion is on the web.   46. A container according to claim 45, wherein the surface with the first protrusion has a plurality of hooks.   46. The container of claim 45, wherein the surface with the first protrusion has a plurality of serrated teeth.   The container according to claim 45, wherein the surface having the first protrusion has a plurality of protrusions.   46. The container of claim 45, wherein the surface with the first protrusion has a serpentine shape.   46. The container of claim 45, wherein the first complementary surface has a protrusion.   46. The container of claim 45, wherein the first complementary surface has a protruding surface.   52. A container according to claim 51, wherein the surface with the protrusions has a plurality of hooks.   52. The container of claim 51, wherein the surface with the first protrusion has a plurality of serrated teeth.   52. The container according to claim 51, wherein the surface with the first protrusion has a plurality of protrusions.   52. The container of claim 51, wherein the surface with the first protrusion has a serpentine shape.   45. The first closure element has two webs, the surface with the first protrusion is on one side of the web, and the surface with a second protrusion is on the other side of the web. Container as described in.   57. A container according to claim 56, wherein the surface with the protrusions has a plurality of hooks.   57. A container according to claim 56, wherein the surface with the first protrusion has a plurality of serrated teeth.   The container according to claim 56, wherein the surface with the first protrusion has a plurality of protrusions.   57. A container according to claim 56, wherein the surface with the first protrusion has a serpentine shape.   57. The container of claim 56, wherein the first complementary surface has a protrusion.   The first complementary surface has a surface with a protrusion, the second closure element has a second complementary surface, and the second complementary surface has a surface with a protrusion. 57. The container of claim 56, comprising:   64. A container according to claim 62, wherein the surface with the protrusions has a plurality of hooks.   64. The container of claim 62, wherein the surface with the first protrusion has a plurality of serrated teeth.   64. A container according to claim 63, wherein the surface with the first protrusion has a plurality of protrusions.   64. The container of claim 63, wherein the surface with the first protrusion has a serpentine shape.   57. A container according to claim 56, wherein the surface with the first protrusions faces inward.   57. A container according to claim 56, wherein the surface with the first protrusions faces outward.   57. A container according to claim 56, wherein the surface with the first protrusion has a different shape than the surface with the second protrusion.   The first closure element includes a first web, a second web, a third web, and a fourth web, and the surface with the first protrusion is on the first web; The second web has a surface with a second protrusion, the surface with the second protrusion has an angle of 90 degrees with respect to the base, and the third web has a third protrusion. 45. The container of claim 44, wherein the container has a surface with a fourth surface and the fourth web has a surface with a fourth protrusion.   71. A container according to claim 70, wherein the third web is parallel to the base.   71. A container according to claim 70, wherein the third web is angled relative to the web.   44. A container according to claim 43, wherein the first closure element has a base and the surface with the first protrusion is parallel to the base.   44. A container according to claim 43, wherein the surface with the protrusion is integral with the base.   74. The container of claim 73, wherein the surface with the first protrusion has a plurality of serrated teeth.   The container according to claim 73, wherein the surface with the first protrusion has a plurality of protrusions.   74. A container according to claim 73, wherein the second closure element comprises a web and the complementary surface is located along the web.   74. The container of claim 73, wherein the first closure element includes a second protrusion.   79. A container according to claim 78, wherein the surface with the second protrusion is parallel to the base.   79. A container according to claim 78, wherein the second closure element comprises a web and has a second complementary surface along the web.   79. The container of claim 78, wherein the surface with the second protrusion is angled 90 degrees with respect to the base portion. 78. The container of claim 77, wherein the first complementary surface has a protrusion.

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