ZA200608440B - Fastenings strips with barbed closure elements - Google Patents

Description

FASTENING STRIPS WITH BARBED CLOSURE ELEMENTS

FIELD OF THE INVENTION

[0001] The present invention relates to interBocking closure strips, and. more particularly, an Anterlocking fastening strip that incluades at least one barbed cle=osure element particularly adapted for use with reclosable plastic storage bags.

BACKGROIND OF THE I'NVENTION

[0002] BK nown closure fastening devices use=d in conjunction with thermoplastic reclosable containers provide an effective seal of thes contents in the container when the fastening devic eis placed in a closed position. Such fastening devices typica_lly comprise a pair- of complementary closure strip elerments that extend longitudinally along the uppem portions of opposed sidewalls of thx e containers. The closure elements are constructed such that they interlockingly engage with each other in a clos ed or occluded positmon, while at the same time permittirmg relatively easy disengag=ement of the closure elerments when the container is opened from the outside.

[0003] _One desirable feature of many such fastening devices is that they enable the user to determine the state of closure of the fastening device. For example, one " known arrange=ment provides a visual indication of" the closure state of the fastening device with the ase of various colorations of the opposed closure elements. ®One such _ arrangement is- disclosed in U.S. Patent 4,829,641. When the opposed closures elements are interlocked, the user perceives a third distinct coloration of overlapping lement portions indicative of proper closure of the container.

[0004] Other conventional techniques utilizze a particular tactile "feel " provided to the user of t-he container to indicate closure of the container. For example=, U.S.

Patent 5,070,584 discloses a zipper arrangement that provides the perceptior of a "bumpy" feel. The zipper arrangement includes a pair of opposing interlocka ble rib and groove profile:s where one of the profiles has a phu_rality of indentations spac-ed longituclinally therealong. These indentati ons purportedly provide an. audible clicking sound ost bumpy feel that is perceptible to “the user as the cutout or we=akened portions flex during closure.

SUMMARY OF THE INVENTION

[0005] The present invention prov-ides a fastening closure strap for use with a reclosable storage container that comprise sa pair of interlocking closwure elements. The fastenimg closure strip has a multiple posi tion feature. "In accordancee with this inventi on, the user can move the closure strip from one position to amnother position.

The engagement surfaces of the closures amare referred to herein as bartoed surfaces owing to the multiplicity of their engagement surfaces. One form of such en gagement surfaces are often referred to as hooks. According=ly, references herein to "howoks" are intended to refer to one type of a barb for use in ths invention. At least one of the closure elemerats has a barbed surface to provide the user of the storage container a distinctive tactile "feel" when the container is closed.

[0006] Structurally, a closure fastening device according to the present invention comprises a pair of opposed, losngitudinally extending closure strip elements adapted to interlockingly engage with each other a fully occluded m=ode. One of the closure element strips includes a plurality~ of barbs extending from arm upright peripheral segment of the closure strip. The second. closure element includes aa complemental segment that intermittently engages the bearbs as the closure elements are moved to the fully occluded mode upon the applicatior of compression forces. This manner of engagement provides a ratcheting sensation to the user of the interlocking closure device. [0007} In one embodiment, the first closure element strip commprises a base portion having a pair of spaced-apart, elongate first webs extending therefrom. The webs each include a male hook member extending outwardly from esach of the respective webs. The second closure ele-ment similarly comprises a. pair of webs extending from a second base portion. The second webs include a p Turality of spaced-apart female barbs that exteend inwardly to permit intermitterat ratcheting engagement with the corresponding hook members when the fastenirg device is moved from a deoccluded mode to the oc cluded mode.

[0008] The invention may also be embodied in a closure fastening device comprising a first male closure elesment that includes a base portion having a pair of spaced-apart, elongate first webs extending therefrom. In this embodiment, the first webs each include a plurality of spaced-apart male barbs extending outwardly from each of the webs. The fastening device includes a female closure element having a pair of second webs extending from a second base portion. At least one of the second webs include a female hook member that extends inwardly to permit inteTmittent ratcheting " engagement with the corresponding male barbs when the fastening device is moved from a deoccluded mode to the oaccluded mode.

[0009] ~ In yet another embodiment, a closure fastening device comprises a male closure element with a pair of we=bs in the form of a serpentine profile configuration to provide a substantial wave like swrface. This profile configuration forms a plurality of interleaved protrusions and corre- sponding depressions. The device further comprises a complementary female closure element including a pair of second webs, each of which has a female hook member adapted to intermittently engage the protrusions of the serpentine profile configurati on. :

[0010] Other advantages and embodiments of the inventior: will be apparentto those skilled in the art upon conssideration of the following detailed description and appended claims, and upon refer ence to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWIN(SS

[0011] Fig. 1 is a perspective view of a thermoplastic reclosable container that is suitable for incorporating the goresent invention.

[0012] Fig. 22 is a cross sectional view of a fastening device with at least o=ne barbed closure element, taken along the lines 2-2 of Fig. 1, shown in a non-occlucied position according to the present invention.

[0013] Fig. 3A isa cross-sectional view of ome embodiment of the male closure element according ®o the invention showing the relative dimensions of the various elements of the male closure element.

[0014] Fig. 3B is a cross-sectional view of ome embodiment of the female closure element according to the invention suitable for use with the male closure element of Fig. 3A and showing the relative dimensions of the various elements «of the female closure elerment.

[0015] Fig. 4A and Fig. 4B are cross section al views of the fastening dev—ice of

Fig. 2 shown in vamrious positions.

[0016] Fig. SA is a cross sectional view of tine fastening device of Fig. 2 ina fully occluded posmtion.

[0017] Fig— 5B is a cross sectional view of araother embodiment of the fasstening device shown in Fag. 5A. : ; :

[0018] “Fig 6 is a cross sectional view of a fastening device shown in a ‘non-occluded position according to a second embodiment of the present invention.

[0019] Fig_ 7 and Fig. 8 are cross sectional v-iews of the fastening device -of Fig. 6 in various positions. :

[0020] Fig_. 9A is across sectional view of thhe fastening device of Fig. 6 ina fully occluded pos-ition.

[0021] Fig . 9B is a cross sectional view of arother embodiment of the fastening device of Fig. 9A.

[0022] Fig. 10 is a cross sectional view of a fastening device shown in a non-occluded posi_ tion according to a third embodimnent of the present invention .

[0023] Fig. 11 and Fag, 12 are cross sectional views «of the fastening device shown in Fig. 10 shown in various positions.

[0024] Fig. 13 is a cross sectional view of the fastening device of Fig. 101n =a fully occluded position.

[0025] Fig. 14 is a cross sectional view of a fastenimg device according to 2 fourth embodiment of the present invention shown in a partially occluded position.

[0026] * Fig. 15 is a cmross sectional view of the fasterming device depicted in Fig. 14 shown in a fully occluded position.

[0027] Fig. 16 is a cmross sectional view of another embodiment of the fasterming device of Fig. 14. . oo

[0028] Fig. 17 is ac Toss sectional view of another embodiment of the present invention.

[0029] Fig. 18 is a c-10ss sectional view of another embodiment of the prese=nt invention.

[0030] Fig. 19 is a cross sectional view of another embodiment of the prese=nt invention. . [0031] "Fig. 20A is aa cross-sectional view of anothe x embodiment shown in a non-occluded position. :

[0032] Fig. 20B is a cross-sectional view of the fastening device in Fig. 20-4 in the occluded position.

[0033] Fig. 21 isa cross-sectional view of another embodiment.

[0034] Fig. 22 is a cross-sectional view of another «<mbodiment.

[0035] Fig. 23 is a cross-sectional view of another embodiment.

[0036] Fig. 24 is a Cross-sectional view of another embodiment.

[6037] Fig. 25 is a cross-sectional view of another embodiment.

DETAYXLED DESCRIPTION OF THE EMBODIMENTS

[0038] Generally, the present invention relates to closure fastening strips that include complemen tal closure elements arranged to bez interlocked over a preselected length of the strip. “The fastening closure strip has a multiple position feature. In accordance with thi = invention, the user can move the «closure strip from one positio=n to another position. T he engagement surfaces of the clo=sures are referred to herein ass barbed surfaces ow-ing to the multiplicity of their eng=agement surfaces. One form of such engagement surfaces are often referred to as hoo=ks. Accordingly, references herein to "hooks" are intended to refer to one type of =a barb for use in this inventio-n.

At least one of the «closure elements has a barbed surf ace used to interconnect a complementary clo-sure element surface when the closure elements are placed in am occluded position. The barbed surface provides a feel of ratcheting engagement, as well as an audible sound, to a user of the plastic container upon the application of compressive forces to the closure bases to actively ermgage the barbs, effectively occluding the fastening strip. .

[0039] Fig. 1 illustrates a thermoplastic contaminer in the form of a plastic

Teclosable storage Thag 4, that incorporates the teachirgs of the present invention. “The storage bag 4 is fowmed of a relatively thin plastic filrm folded along the bottom to provide a pair of oypposed sidewalls 6, 8 joined togetlner along their side edges, ancl providing an openi ng or mouth 9 at the edge opposite the folded edge. Fig. 1 also skhows a closure fasteningg, device 10 including a pair of opposed closure elements 12 and 14 connected to the sidewalls. The closure elements 12, 14 preferably each comprise= an elongate extruded -plastic strip that together form a re=closable fastening device extending longitudinally between the side edges of tine opposed sidewalls 6, 8, ‘ proximate to the opening of the storage bag 4.

[0040] Figo. 2 is a cross sectional view of the closure fastening device 10 illustrating one profile configuration according to the present invention. The deviece 10 includes a first clo sure element 12 and a second compplementary closure element 1-4. In the embodiment shown, the closure elements are each plastic strips that include respective base portions which, in turn, are connected to “the container sidewalls. The respective base portions are denoted in Fig. 1 by numerals 16, 18. Although the cl osure elements 12, 14 are illustrated as separately formed and thereafter connected to 2 pelastic film which forms the sidewalls of the container, they may~ also be integrally forme with the container sidewalls in a conventional manner.

[0041] The structural details of the closure elements 12 and 14 are best s<en in

Fig. 2, as well as Figs. 3A-4B. The first closure elemen® 12 is a male element comprising a pair of spaced-apart webs 20, 22 disposed -in parallel relation and extending generally orthogonally to the base portion 16. As used herein, the term "male" will refer to a closure element or portion that inteerfits into the mating closure element and has generally outwardly extending hooks omr other interlocking porti-ons.

The outer element which generally has inwardly extendi ng hooks or other portioms will be referred to as a "female" closure element or portion. A pair of male hook memmbers © 24, 26 are attached to the respective legs such that they Face outwardly from eachm other.

In particular, the first male hook member 24 is disposed at the distal end of the first web and protrudes outwardly therefrom. In this embodinent, one of the hook memmbers 24 includes an inwardly extending guide surface 28 that extends at least partiallsy inwardly from the fixst web 20. In operation, the guide surface 28 serves to guile the hook members for occlusion with the female barbs of a mating closure element, as described below. As noted above, the second web 22 h_as the male hook member 26 protruding outwardly from its distal end. This hook member includes a crownecior guide surface 30 that likewise facilitates engagement with the female barbs of the mating closure element. If desired, the guide surface 30 may extend inwardly from the web 22 similar to guide surface 28 and operate in a sim_ilar manner. In addition, the webs 20, 22 may each include two, three, four or more externally disposed barb s, as may be desired, such as the barbs 26a-26c¢, 24a-24c shaewn in Fig. 5B or the barbs 142a-c, 146a-c shown in Fig. 6.

[0042] The first closure element 12 also includes a pair of opposed winged guide m_embers 32, 34 spaced laterally from the webs 20, 22 respectively. Preferably, the guide members 32, 34 are each cons-tructed with end segments 32e, 34e that flare outwardly in order to funnel or guide thee complementary webs of t-he second closure element 14 into alignment with the males hook members 24 and 26 as the closure elements are occluded, as described in greater detail below. :

[0043] Fig. 2 illustrates the struectural details of the second female closure elemenst 14. This closure element simil arly comprises first and seccond spaced-apart webs 365, 38 disposed in parallel relatior and extending generally o=rthogonally from the base pomrtion 18. The first web 36 incluades a plurality of spaced-apmart integrally formed female barbs 40a, 40b, 40c, each of whixch extends inwardly from tine first web 36. Each of the Darbs 40 have generally contoured surfaces 42a-c which guide the barbs 40 into mated e=ngagement with the corresponding male hook member 24 of a mating closure element. The barbs further define a plurality of notches 44a-c in thme interstices between adjacerntbarbs. Likewise, the second w eb 38 includes a plurality o—f spaced-apart female - barbs 46a, 46b, 46¢, which extend inwardly from the second web 38. These barbs 46 similarly have generally contoured surfaces 48a-c which guide the barbs 46 into mated engage=ment with the corresponding male hook member 26 of a maating closure element.

Likew~ise, the barbs 46 define a plurality of interdigital notches S#0a-c in the spaces : between adjacent barbs. While this paxticular embodiment showss three barbs per web, each w=eb may have two, three, four, or more barbs as may be desaared.

[0044] In this embodiment, the= closure element 14 includes a fin 52 extending from tke base 18 between the webs 36, 38. The fin 52 may be included to maintain the structuaral integrity and facilitate the extrusion of the closure elem _ent 18. Similarly, closure element 12 may also include a fin extending from base 16. Furthermore, the closurez elements 12, 14 may include ome, two, three or more fins as may be desired.

The fir may be used with any of the embodiments in this applicatmon as appropriate. In addition, the fin may also be designed to also function as a color enhancement member as described in U.S. Patent 4,829,641, the subject matter of whickh is incorporated herein by reference.

[0045] = The= representative dimensions of a representative male closure element is shown in Fig. 3% where the dimensional values corresponding to the letters showma in the drawing are as follows: :

Parameter ~~ Range Preferred

A 0275-0355 0.315

B 0.099-0.169 0.134

Cc 0.026-0.066 0.046.

D 0.135-0.215 0.175

F 0099-0169 0.134 oo

G 0.013-0.023 0.018

[0046] Thae female closure element used in conjunction with the male closure element of Fig. 3A is shown in Fig. 3B wherein the dimensional parameters are thes following for a re=presentative embodiment: : I

Parammeter Range Preferred :

H 0.235-0.315 0.275 oo

I 0.108-0.178 0.143

J 0.013-0.033 0.023

K 0.012-0.022 0.017 oo

L 0.037-0.067 0.052

MC 0.023-0.053 0.038 :

N 0.013-0.023 0.018 0 © 0.013-0.023 0.018

P 0.013-0.023 0.018

Q 0.024-0.044 0.034 :

[0047] Inm operation, compression forces are applied to the opposed closure= elements 12 and 14 in the directions denoted by the arrows 66, 68 shown in Fig. 4A. and - o

Fig. 4B, substantially normal to the plane of the respective container sidewalls and base portions 16, 18. Such forces are typically apsplied as the user engages tche surfaces of the * container and depresses or pinches his or her fingers along a desired Rength of the closure elements 12, 14. This action movess the opposed male hook rnembers 24, 26 : into coratacting relation with the respective barb elements 40, 46 which flexes both pairs of webs to permit clearance of the hook me=mbers and barbs, as show=nin Figs. 4A and 4B. Thus, the respective female webs 36,3 8are flexed outwardly. Amt the same time, the respective webs 20, 22 of the male closure clement 12 are flexed inwardly.

[0048] As the closure members are urged together, the male lhook members 24, 26 intexmittently engage corresponding oness of the barbs 40, 46 as tine hook members are located within the notches disposed inte=rmediate to the barbs. Th_e closure elements thus termporarily achieve the orientation sh_own in Fig. 4B. In this w ay, the closure element ts interlock in an interdigitating stegp-wise fashion until they are fully occluded, as showwn in Fig. 5A. Accordingly, a ratchesting engagement of the mmale hook members with th e barbs that is perceptible to the user occurs as the closure elements are urged together in an interdigitating fashion. In ad dition, this manner of ratcheting engagement generates an audible sound at each instances in which the hook member disengages from one of the barbs and is located within the otches formed therebetweeen due to the interdi gitating nature of the opposed webs . The sound is caused by the ratcheting or snapping of the hook into the notch which _ results from the release o-f the flexure force of the Took. This sound is likewise readily perceptible by the user uring a closure operation. :

[0049] Preferably, each such intermittent engagement of the male hook elements with respective ones of the barbs= provides sufficient interlocking engagement of the closure elements to maintain closures of the container. In most instances, however, the user will fully occlude the opposed closure members, in part due to the audible sound generated by the fastening device. [0050} In order to deocclude the fzastening device 10, the closure elements 12, 14 are urged apart from each other by pulling on the mouth portion of the plastic :

contaziner (see Fig. 1). Such pulling action tends to urge the male webs 20, 22 inwardly and tlhe female webs 36, 38 outwardly to permit passage of corresponding male hook members 24, 26 and barbs 40, 46. The saxme intermittent engagement is perceived by the usser as a ratcheting of the closure elements 12, 14. [005A] In Figs. 1-5A, the webs 36, 38 have a barbed surface and tine other webs 20, 2-2 have a complementary surface with a single barb. The ratcheting e=ngagement is achieved when a single barb engages the barbed surface. However, as notzed above, the webss 20, 22 could include multiple barbs as opposed to a single barb. Thmus, a barbed surfamce would engage another barbed surface as shown in Fig. SB. Fig. 5 Bis another embeodiment of Figs. 1-5A. The webs 20, 22 each include three externall y disposed hools 24a-24c, 26a-26¢c. Each of these hooks may be of the same size or— some of the hooks may be of a different size, such as the smaller hooks 24c, 26¢c. Thee number and size of the hooks will depend upon the particular use for the fastening strip. . . [00582] Fig. 6 shows the profile configuration of a fastening device 110 according to a second embodiment of the present invention. In this embodiment, a femazale closure element 112 includes inwardly oriented hook members w Thich interlock witha mating barbs of a male closure elemuent 114. In particular, the femazle closure element 112 includes a pair of spaced-apart webs 120, 122 disposed in paarallel relation and extending generally outwardly from a base portion 116. In this embeodiment, the fem. ale webs 120, 122 each include a corresponding hook member 124, 1 26 disposed at their respective ends such that they protrude inwardly from each other. Each of the hook members 124, 126 are formed with a contoured surface 128, 130 to muide the hook mermbers for occlusion with corresponding male barbs of a mating closure element. If desired each female web 120, 122 may include two, three or more hook members as sho=wn by hook members 124a-124c, 126a-126¢, in Fig. 9B.

[00253] The male closure element 114 comprises a base section 1 18 that sim_ilarly has a pair of spaced-apart webs 136, 138 extending outwardly —from the base portion 118. A first one of the webs 136 includes a plurality of spaced-apart barbs 140wa-c, each of which extends outwardly from the first web 136. As winth the female closure element desacribed above, the barbs 140 are formed integrally vith the first web 136 and have generally contoured surfaces 142a-c¢ “which guide the bamrbs into mated engagement with tine corresponding female hook member 124. The bamrbs 140 similarly define a plurality o finterdigital notches 144a-c in she spaces between the barbs. :

Likewise, the secomnd web 138 includes a plurality of spaced-apart barbs 146a-c which extend outwardly From the second web 138. The barb 146a disposed at the distal end of the second web preferably includes an inwardly~ extending guide suarface 148a that extends at least pamrtially inwardly from the second web 138. This guide surface 148a assists in guiding the barb 1462 for occlusion witlm the mating female hook member.

The remaining sur faces corresponding with the barbs 146b and 146¢ each include contoured surfacess 148b-c to similarly facilitate emngagement of the barbs 148b-c with the mating female hook member. The barbs 146 additionally form a plurality of interdigital notche=s 150a-c in the spaces between adjacent barbs. As with the ~ embodiment desci=ibed above, each web may simi larly have two, three, four, or more barbs as may be d=esired. oo oo

[0054] | Th e male closure element 114 also includes a pair of mopposed winged guide members 1332, 134 spaced laterally from thes webs 136, 138. Ams with the guide members describe=d above in connection with Figss. 2-5, the guide mermbers 132, 134 are - each constructed with end segments 132¢, 134e that flare outwardly away from respective webs 1 36, 136 in order to guide the webs 120, 122 of the female closure element into aligrmment with the male barbs wher the closure elemerts are occluded.

[0055] In the illustrated embodiment, the female closure eler ment 112 includes a fin 152 extendirg from the base 116 and the ma_le closure element 114 includes a pair of spaced-apart fins 160, 162 extending from the base 118 intermedmate the webs 136, 138. The fins 1522, 160, 162 may be included to maintain the structumral integrity and facilitate the extriasion of the closure elements 11@6, 118. The closure ¢lements 112, 114 may include one, two, three or more fins as may “be desired. :

[0056] | The operation of the closure fasteming device shown in Figs. 6-9B is similar to that described above. Compression fomces similarly are applied to the opposed closure eleements 112 and 114 in the direction denoted by thee arrows 166, 168 in Figs. 7 and 8, sumbstantially normal to the plane of the respective baase portions 116, 118. This action roves the opposed female hook members 124, 126= into contacting relation with the respective barbs'140, 146 which flexes both pairs o—f webs to permit clearance of the hook members and barbs. This p-ermits intermittent ratcheting engagement of the: hook members 124, 126 with corresponding ones. of the barbs 140, 146 as the hook m_embers are located within the imnterdigital notches 144, 150 formed between the barbs Accordingly, a ratcheting eng=agement of the femaale hook members with the barbs that is perceptible to the user occumrs as the closure elements are urged together. This ratecheting engagement likewise generates an audible sound at each instance in which the hook member disengages ome of the barbs and. is located within the notches. As neoted above, the same ratcheting feel is perceived b=y the user when the closure elements “112, 114 are deoccluding,.

[0057] " Ammother embodiment of Figs. 6-9-A is shown in Fig. ©B. The webs 120, © 122 each include three internally disposed hooks 124a-124c, 126a-1 26c. Each of these hooks may be of the same size or some of the ho=oks may be of a different size, such as the smaller hooks 124c, 126c. The number and ssize of the hooks will depend upon the particular use for the fastening strip.

[0058] Fi = 10, as well as Fi gs. 1 1-13, illmustrate cross sectiomnal profile views of a third embodime=nt of the present invention. In t his embodiment, a first female Aosars element 212 comprises a pair of spaced-apart we bs 220, 222 extending outwardly from a base portion 2165. The webs 220, 222 each incltade a hook elementss 224, 226 disposed at the distal ends ofthe respective webs that are =adapted to interlock<ingly engage segments of a second male closure element 214. Each web 220, 22.2 may include one, two, three or mor-e hook members as may be desired. The second closure element 214 includes a pair of spaced-apart serpentine webs 236, 238 that extenad generally outwardly from a_ base portion 218. In this embosdiment, the first wesb 236 of the pair is of a wave like or serpentine configuration, and imncludes a plurality eof spaced protrusions 240a—c, each of which projects outw=ardly from the first web 236. The serpentine profile configuration also defines a plurality of spaced depressions 253H4a-C in the spaces between. the protrusions. Likewise, the se=cond web 238 includes spaced protrusions 246a-c. which extend outwardly from the second web 238. The profile configuration of thee second web 238 similarly defines a plurality of spaced depressions 250a-c¢ intermediat e to the protrusions. While the webs are shown with three : protrusions and comresponding depressions, other numbers of protrusions and depressions may allternatively be utilized, such as, tv=o protrusions and depress-ions, or four protrusions arad depressions, or five or more protrusions and depressions. The protrusions are sinrilar to barbs.

[0059] The male closure element 214 also inecludes a pair of guide mem_bers 232, 234. As noted abOwe, the guide members 232, 234 zare spaced laterally from tthe webs 236, 238, respectiwely. The first closure element 212 includes a fin 252 extend _ing from the base 216 and tthe second closure element 214 includes two fins 260, 262 exxtending from the base 218 . The fins 252, 260, 262 may be included to maintain the staructural integrity and facili tate the extrusion of the closure eRements. The closure elements 212, 214 may include Ore, two, three or more fins as ma_y be desired.

[0060] In order to effectuate closure of the Fastening device 210 showm in Figs. 10-13, the oppose d closure elements 212 and 214 acre compressed in a direction NB substantially nornnal to the plane of the respective tease portions 216, 218. Th_eclosure elements are thereby urged into contacting relation as the opposed female hoowk members 224, 22¢5 abut against the ends of the resp ective serpentine webs 236, 238.

This flexes both ofthe serpentine webs 236, 238 inwardly to permit clearance= of the hook members an d protrusions of the serpentine we bs. At the same time, the r-espective fernale webs 220, 222 are urged outwardly to permit intermittent engagement of the hook members 224, 226 within corresponding depressions 244, 250 formed im the serpentine webs. This arrangement likewise provicies an intermittent, ratcheting engagement of thee female hook members 224, 226 as they traverse the serpen—tine webs that is readily perceptible to the user. The user likeswise perceives such interrmittent engagement wher the closure elements are deocchumding. The webs may also "have

V0 2005/108226 PCT/US2005/0125()1 different configurations. For example, both webs could be serpentine and engage iTnan interdigitating fashion as in Figs. 20A and 20B. Similarly, the webs could have a SSaw tooth configuration as in Fig. 21,0ra series of rounded protrusions configuration as in

Fig. 22. The webs could then provide multiple engagements after the first engagenment.

Several configurations can be utilized as long as the mating and contact points promvide a leak resistant closure.

[0061] Figs. 14 and 1 5 illustrate another embodiment of the present invention.

In this embodiment, a fastening device 310 includes a plurality of spaced protrusions Or - bumped surfaces which are formed in the base portion of one of a pair of complementary closure elem ents. As shown, a first closure element 312 comprises a base portion 316 having a pa ir of inner male webs 320, 322 extending therefrom with ~male hook portions 324, 326 connected to the distal ends Of the inner webs. The first hook portion 324 includes a crowned surface 330, while the second hook portion 326 = includes an inwardly facing surface 328. A pair of outer webs 332, 334, spaced latesrally from the inner webs 320, 3222, extend from the base portion 316 a distance greater than the inner webs 320, 322. Th e outer webs 332, 334 can be oriented relative to saidll base in the range of 45-90 degreess with the range of 75-90 degr ees preferred. In Fig. 1-4, the outer webs 332, 334 are oriented relative to the base 316 aut an angle of approximately 82 degrees. The webs 332, 334 may have any configuration which will facilitate the movement of the webs 332, 334, such as curved ends 332a, 334a. [0062) A second clo sure element 314 similarly comprises a base portion 318 with a pair of inner female vwebs 336, 338 with female hook portions 340, 342 located at the ends of the inner webss. Each of the female hook portions include an inwar-dly facing surface shown in Figs. 14-15 as numerals 344, 346, respectively. As with the embodiments described above, these surfaces facilitate interlocking engagement eof the male and female hook portions. The base portion 318 of the female closure element has a substantially greater width than that of the male closure element in order to pro-videa plurality of protrusions or bumped surfaces 340a-c, 346a-< extending beyond the outer ends of the male closure element base portion 316. A plurality of depressions 34—8a-c, : :

350a-c are thus for-med intermediate the protrusions. While the illustrated embodiment employs three pro®&rusions and corresponding depresssions disposed at the outer ends of ‘the base portion 3 16, one, two, three or more protrusions and depressions may also be used as desired.

[0063] In eorder to interlock the fastening device, a compression force ms applied to the opposed closure elements 312, 314 such thamt the outer webs 332, 334 abut corresponding inmermost protrusions 340a, 346, amsis shown in Fig. 14. As se=eninFig. 14, the male and Female hook members are not yet in interlocking engagemenwt. Further compression forces flex the outer webs 332, 334 suach that the ends 332a, 334a_ are urged past the protrusions 340a, 346a, respectively, and are next located in the depressions 348b, 350b forme=d between the protrusions 340a-"b, 346a-b. The outer webs are moved in step-wise fashion until they abut stop surfaces formed on the protrusions 3=40c, 346c, ‘as shown in Fig. 15. In this position, the male aned female closure elements amre fully occluded. When the closure device is occluded ass illustrated in Fig. 15, the Outer webs 332, 334 are oriented relative to the base 316at a_nangle of approximately 5 degrees.

This arrangemerat likewise provides a ratcheting engagement of the outer webs with the depressions formmed between laterally extending bumped surfaces that is perceptible to the user as the cl-osure elements are urged together. In addition, an audible s-ound is generated. a

[0064] Another embodiment of the spaceed protrusions or bumps is sh_own in Fig. 16. In this embowdiment the spaced protrusions h ave a saw tooth configuraticon.

Specifically, the closure elements 412, 414 are si=milar to the closure elements 312,314 noted above. However, the base portion 418 has a plurality saw tooth protnasions 440a-440c, 446am-446¢. A plurality of depressiorns 448a-448d, 4502-4504 ar « thus formed adjacent the protrusions. The outer webss 432, 434 are moved in a st-ep-wise fashion until the webs abut stop surfaces 440d, 4-46d.

[0065] | T he closure device may include osther types of closure elememnts.

Referring to Fig_. 17, the closure device includes amale closure element S512 and a female closure element 514. The male closure element includes a web 520 —which extends from a base 516. The web 520 includes a head portion 524 a-nd protrusions 527, 529. The fermale closure element 514 inclucies a channel 539 and twvo webs 541, 543 which exten from a base 518. The webs 54-1, 543 include barbs 54 =5a-545c, 547a-547c and notches ~549a-549c, 551a-551c adjacent the barbs. The barbs h_ave generally contoured surfaces which guide the protrusiions 527, 529 into matead engagement with the notches S549a-549c, 551a-551c. While &his particular embodiment shows three barbs per wanll, each wall may have one, tweo, four or more barbs as- may be desired.

[0066] As the closure elements are urged together, the males protrusions 527, 529 intermittently engage corresponding ommes of the barbs 545a-54 5c, 547a-547c as the protrusions 527, 529 are located within the otches 549a-549¢, 551:a-551c. The closure elements interlock in an interdigitating step-wise fashion until they are fully occluded.

Accordingly, a ratcheting engagement of time protrusions with the toarbs that is perceptible to the user occurs as the closure elements are urged tog=ether in an interdigitatimng fashion. In addition, this maanner of ratcheting engagement generates an audible sound at each instance in which the protrusion disengages f=rom one of the barbs and is located within the notches formed thu erebetween due to the irnterdigitating nature.

The sound dis caused by the ratcheting or sanapping of the protrusion into the notch which results from the release of the flexuare force of the barb. This sound is likewise readily perc eptible by the user during a closure operation. Co

[0067] Another embodiment of the= closure element with rrultiple barbs 1s shown in Fi g. 18. The closure device inclu_des a male closure elem ent 612 and a female closure elerment 614. The male closure ‘element 612 includes a we=b 620 which extends from a base 616. The web 620 includes a “head portion 624, protriasions 627a-627c, 629a-629¢ znd notches 649a-649c, 651a-6 Slc. The female closumre element 614 includes a channel 639 and two webs 641, 643 which extend fromm a base 618. The webs 641, 643 include barbs 645, 647. While this particular embodiment shows three protrusions on each side of the web, each side of the web may hav~e one, two, four or more protruasions as may be desired.

(0068) As the closure elements are urged together, the male protrusions 627, 629 intermittentlsy engage corresponding ones of fhe barbs 645, 647 as the bearbs are located within thes notches 649a-649c¢, 651 a-55 1c_. The closure elements interlock in an interdigitating step-wise fashion until they are fully occluded. Accordingly, =a ratcheting engagement of tae protrusions with the barbs that is perceptible to the user o ccurs as the closure elements are urged together in an interdig=itating fashion. In additio=n, this manner of ratche-ting engagement generates an aumdible sound at each instan_ce in which the protrusion di sengages from one of the barbs and is located within the neotches formed therebetwveen due to the interdigitating nature. The sound is caused by the ratcheting or snapping of the barb into the notch which results from the rele=ase of the flexure force of ®he barb. This sound is likewise readily perceptible by the user during a closure operation.

[0069] T he embodiment shown in Fig. 1S combines the female closure element of Fig. 17 with tJhe male closure element in Fig.1 8. The female closure element 7 14 is similar to female closure element 514 in Fig. 17_ The male closure elemernt 712 is similar to male closure element 612 in Fig. 18.

[0070] T he female closure element 714 i_ncludes a channel 739 andl two webs 741, 743 which extend from a base 718. The wells 741, 743 include barbs 745, 747 and notches 749, 75 1 adjacent the barbs. The barbs Thave generally contoured surfaces which guide the protrusions 727, 729 into mated engagement with the notches 749, 751.

While this parti cular embodiment shows three b=arbs per wall, each wall m ay have one, two, four or mowre barbs as may be desired. oo

[0071] Lhe male closure element 712 includes a web 720 which extends from abase 716. The web 720 includes a head portiorm 724, protrusions 727, 729 and notches 749, 751. While this particular embodiment shows three protrusions on each side of the web, each side Of the web may have one, two, four or more protrusions as may be desired.

[0072] In order to effectuate closure of the fastening device 710 shmown in Fig. 19, the opposed. closure elements 712 and 714 are compressed in a direction substantially normal to the plane of" the respective base portions 7" 16, 718. The closure el ements are thereby urged into cortacting relation as the web 7260 engages the respective webs 741, 743. The webs 741, 743 are urged outwardly to permit intermittent engagement of the barks with the protrusions and int-ermittent engagement of the barbs and protrusions with tine respective notches. This armrangement likewise ~ provides an intermittent, ratcheting engagement that is readily pe=tceptible to the user.

T he user likewise perceives such iratermittent engagement when ®he closure elements axe deoccluding. [©073] Referring to Figs. 2 0A and 20B, both webs could be serpentine and engage in an interdigitating fashiom. The closure device 810 incRudes a first closure element 812 and a second closure «element 814. 10074] The first closure element 812 is similar to closure= element 214 in Figs. 1 0-13. The first closure element & 12 includes a pair of spaced-apart serpentine webs 820, 822 that extend generally outwvardly from a base portion 816. In this embodiment, the first web 820 of the pair is of am wave like or serpentine configuration, and includes a plurality of spaced protrusions 824a-c, each of which projects o—utwardly from the first web 820. The serpentine profile c onfiguration also defines a plumrality of spaced ~ depressions 825a-c in the spaces beetween the protrusions. Likevvise, the second web 822 includes spaced protrusions 8 26a-c, which extend outwardly from the second web ~~ 822. The profile configuration of the second web 822 similarly =defines-a plurality of spaced depressions 827a-c interme=diate to the protrusions. While the webs are shown with three protrusions and corresponding depressions, other numbers of protrusions and depressions may alternatively be wmtilized, such as, two protrusiomns and depressions, or four protrusions and depressions, «or five or more protrusions anc depressions. The protrusions are similar to barbs.

[0075] The second closures element 814 is similar to the first closure element 812. The second closure element 814 includes a pair of spaced-. apart serpentine webs 836, 838 that extend generally outwardly from a base portion 8 1 |. In this embodiment, the first web 836 of the pair is of za wave like or serpentine confi guration, and includes

VO 2005/108226 P*CT/US2005/012501 a plurality of spaced protrusions 840a-c, each of which projects outwardly from the first web 836. The serpentine profi le configuration also defines a plurality of spaced depressions 844a-c in the spac es between the protrusions. Likewi se, the second web 838 includes spaced protrusioras 846a-c, which extend outwardly from the second web 838. The profile configuratior: of the second web 838 similarly defines a plurality of spaced depressions 850a-c intesrmediate to the protrusions. While the webs are shown with three protrusions and corresponding depressions, other numbers of protrusions and depressions may alternatively be utilized, such as, two protrusions and depressions, or four protrusions and depressions, or five or more protrusions and depressions. The protrusions are similar to barbs.

[0076] The male closure element 814 also iricludes a pair of guide members 832, 834. As noted above, the guide members 832, 834 are spaced laterally from the webs 836, 838, respectively. The fi rst closure element 812 includes a fin 852 extending from the base 816 and the second closure element 814 includes two firas 860, 862 extending from the base 818. The fins 852, 860, 862 may be included to maintain the structural integrity and facilitate the extmrusion of the closure elements. The closure elements 812, 814 may include one, two, tharee or more fins as may be desired. ~ B N

[0077] In order to effectuate closure of the fastening devi ce 810 shown in Fi g. 20A, the opposed closure elements 812 and 814 are compressed in a direction oo substantially normal to the pl ane of the respective base portions 816, 818. The closure elements are thereby urged into contacting relation as the opposed serpentine webs 820, 822 abut against the respective serpentine webs 836, 838. The serpentine webs 836, 838 flex inwardly to permit intermittent engagement of the protrusions with the other protrusions and intermittent esngagement of the protrusions with the depressions. At the same time, the respective webs 820, 822 are urged outwardly to permit intermittent engagement of the protrusioras with the other protrusions and intermittent engagement of the protrusions with the depressions. This arrangement likewise provides an intermittent, ratcheting engagement that is readily perceptible to the user. The user

Likewise perceives such intezrmittent engagement when thse closure elements are eoccluding. 0078] Referring to Fig. 21, both webs could have= a saw tooth configuration and engage in an interdigitatingz fashion. The closure device 910 includes a first closure «clement 912 and a second closure element 914. 10079] The first clossure element 912 includes a air of spaced-apart webs 920, 922 that extend generally osutwardly from a base portion 916. In this embodiment, the first web 920 of the pair in«cludes a plurality of spaced triangular protrusions 924, ach of which projects outwardly from the first web 920. The profile configuration alsO defines a plurality of space=d depressions 925 in the spac-es between the protrusions.

Likewise, the second web 922 includes spaced triangular protrusions 926, which ex_tend outwardly from the second web 922. The profile configuration of the second web 922 similarly defines a plurality of spaced depressions 927 imntermediate to the protrusi ons.

While the webs are shown with four protrusions and cosmesponding depressions, Other "numbers of protrusions and depressions may alternative=ly be utilized, such as, two protrusions and depressions, or three protrusions and de=pressions, or five or more protrusions and depressions. The protrusions are similamr to barbs.

[0080] The second closure element 914 is similar to the first closure eleme=nt 912. The second closure element 914 includes a pair of spaced-apart webs 936, 938 that .extend generally outwardly from a base portion 918. Inu this embodiment, the firsk web 936 of the pair includes a plurality of spaced triangular protrusions 940, each of which projects outwardly from tine first web 936. The profile configuration also defines a plurality of spaced depressions 944 in the spaces betwe en the protrusions. Likewise, the second web 938 includes spaced triangular protrusieons 946, which extend outwardly from the second web 938. The profile configuration of the second wet 938 similarly defines a plurality of spaced depressions 950 mntermediate to the protrusions.

While the webs are shown with four protrusions and ceorresponding depressions, other numbers of protrusions arad depressions may alternatively be utilized, such as, tweo protrusieons and depressions, or three protmrusions and depressions, or fives or more protrusi=ons and depressions. The protrusions are similar to barbs. :

[0081] The male closure element O14 also includes a pair of guides members 932, 934. Ass noted.above, the guide members. 932, 934 are spaced laterally farom the webs 936, 938, respectively. The first closure e=lement 912 includes a fin 952 extending from the base 916 and the second closure elem_ent 914 includes two fins 960, 962 extending from th_e base 918. The fins 952, 960, 96-2 may be included to maintain the structural integrit-y and facilitate the extrusion of the closure elements. The closure elements 912, 914 mamy include one, two, three or more fins as may be desired.

[0082] In order to effectuate closwre of the fastening device 910 shown in Fig. 21, the opposed closure elements 912, 91_4 are compressed in a directiora substantially normal to the plane of the respective bases portions 916, 918. The closuxe elements are thereby urged into contacting relation as the opposed webs 920, 922 abuat against the respective webs 936, 938. The webs 936, 938 flex inwardly to permit iratermittent engage=ment of the protrusions with the owther protrusions and intermittent engagement of the protrusions with the depressions. At the same time, the respective: webs 920, 922 are urged outwardly to permit intermittermt engagement of the protrusions with the other protrussions and intermittent engagement of the protrusions with the deperessions. This arrangement likewise provides an intermittent, ratcheting engagement that is readily perceptible to the user. The user likewise perceives such intermittent en agement when the clo sure elements are deoccluding.

[0083] The triangular protrusions 924, 926, 940, 946 are designed so that the force reequired to occlude the closure dev-ice is less than the force required to deocclude the closure device. Specifically, the faces of the triangular protrusions which contact during occlusion are at an angle which will facilitate occlusion. The faces of the triangualar protrusions which contact duri ng deocclusion are horizontal which will make deoccl-usion more difficult than occlusion. The angles of the faces can Te changed to achiev e the desired results.

[008%] Referring to Fig. 222, both webs could have a rovanded protrusions confi guration and engage in an inteerdigitating fashion. The closure device 1010 inclumdes a first closure element 10 12 and a second closure elenment 1014. [008-5] The first closure element 1012 includes a pair o=f spaced-apart webs 1020), 1022 that extend generally outwardly from a base portion 1016. In this embeodiment, the first web 1020 of the pair includes a plurality= of spaced rounded protecusions 1024, each of which p rojects outwardly from the frst web 1020. The . profile configuration also defines a plurality of spaced depress-ions 1025 in the spaces between the protrusions. Likewise, the second web 1022 includes spaced rounded prot=xusions 1026, which extend omutwardly from the second web 1022. The profile configuration of the second web L 022 similarly defines a plurality of spaced depressions 1027 intermediate to &he protrusions. While the webs are shown with three protrusions and corresponding degpressions, other numbers of gprotrusions and depressions may alternatively be mitilized, such as, two protrussions and depressions, or four protrusions and depressions, or five or more protrusions zand depressions. The : prot_rusions are similar to barbs. 5

[00836] The second closuree element 1014 is similar to —the first closure element 1012. The second closure elemerat 1014 includes a pair of spaced-apart webs 1036, 103 8 that extend generally outwaxdly from a base portion 101 8. In this embodiment, the - first web 1036 of the pair incl udes a plurality of spaced rounded protrusions 1040, eackn of which projects outwardly from the first web 1036. Tine profile configuration alsom defines a plurality of spaced depressions 1044 in the spaces between the protrusions. Likewise, the secondl web 1038 includes spaced reounded protrusions 1046, whi_ch extend outwardly from the second web 1038. The profSile configuration of the second web 1038 similarly defines a plurality of spaced depre=ssions 1050 intermediate to thhe protrusions. While the webms are shown with three protrmusions and corresponding dep ressions, other numbers of protrusions and depressions ma_y alternatively be utilized, suchh as, two protrusions and depreessions, or four protrusions aand depressions, or five or mone protrusions and depressionss. The protrusions are similaar to barbs. :

[0087] ~The second closure element 1014 =also includes a pair of guide rmembers 1032, 1034. As noted above, the guide members 1032, 1034 are spaced laterally from the webs 1036, 1038, respectively. The first closure element 1012 includes a fin 1052 extending from the base 1016 and the second clo=sure element 1014 includes two fins 1060, 1062 extending from the base 1018. The Fins 1052, 1060, 1062 may be included to maintain the structural integrity and facilitate the extrusion of the closure el ements.

The closure elerments 1012, 1014 may include ore, two, three or more fins as amay be desired. :

[0088] In order to effectuate closure of the fastening device 1010 shown in Fig. 22, the opposed closure elements 1012 and 10148 are compressed in a directiom substantially normal to the plane of the respectiwe base portions 1016, 1018. “The closure elements are thereby urged into contactimng relation as the opposed webs 1020, © 1022 abut against the respective webs 1036, 103 8. The webs 1036, 1038 flex inwardly to permit intermittent engagement of the protrusions with the other protrusioras and intermittent engagement of the protrusions with the depressions. At the same time, the respective webs 1020, 1022 are urged outwardly to permit intermittent engagement of the protrusions with the other protrusions and irmtermittent engagement of the protrusions withthe depressions. This arrangenment likewise provides an intermuttent, ratcheting engagement that is readily perceptibles to the user. The user likewise perceives such intermittent engagement when tie closure elements are deoccXuding.

[0089] Fig. 23 illustrates another embodiment of the present inventiom. In this embodiment, a fastening device 1110 includes Outer webs with a barbed surface which are disposed at an angle to the base portion. Th_e fastening device 1110 inclu des a first closure element | 112 and a second closure element 1114. The first closure element © 1112 includes inner webs 1120, 1122 and a basee 1116 which are similar to webs 120, 122 and base 1 16 in Fig. 6. The first closure eleement 1112 also includes outer webs 1132, 1134 which are disposed at an angle to th.e base portion 1116. The out er webs 1132, 1134 can be oriented relative to said base= in the range of 30-60 degrees with the angle of 45 degrees preferred. In Fig. 23, the outer webs 1132, 1134 are oriemted relative to the base at an angle of apperoximately 45 degrees. The outer webs 1132,1134 include barbed surfaces 1 140, 1146 While this embodiment enmnploys surfaces 1140, 11-46, other embodiments may use Other surfaces, such as surfaces 340, 346 in Figs. 14 -15 or surfaces 440, 446 in Fig. 1 6. [0®090] The second closure element 1114 includes inner webs 1121, 1123 and a ba_se 1117 which are similar to web s 20, 22 and base 16 in Fig. 2. The second closure element 1114 also includes outer wesbs 1133, 1135 which are dissposed at an angle to the baase portion 1117. The outer webs 1133, 1135 can be oriented relative to said base in thee range of 30-60 degrees with the angle of 45 degrees preferred. In Fig. 23, the outer weebs 1133, 1135 are oriented relati_ve to the base at an angle of ~ approximately 45 de=grees. The outer webs 1133, 11385 include barbed surfaces 1 141, 1145. The barbed surface may have any configuratiorn which will appropriately eragage the corresponding web.

[0091] . In this embodiment, the barbed surface includes- triangular protrusions.

Thhe triangular protrusions are desigzned to control the magnitudee of the tactile sensation booth during opening and closing of the closure device. Specifically, the faces of the traangular protrusions which contact during occlusion are at an angle which will create a strong tactile sensation during oc clusion. The faces of the tri angular protrusions which contact during deocclusion are substantially vertical whilich will create a reduced om mild tactile sensation during occlusion. The angle of the faces can be changed to achieve the desired results.

[0092] The fastening devic e 1110 is shown in the occluaded position in Fig. 23.

Compression forces are applied to the closure elements 1112, 1114 and the webs are umrged into contact with each other. The inner webs engage as raoted above with respect to Figs. 14-16. The outer webs flex: as the barbed surface of one= web 1134, 1135 engage the barbed surface of the other web 1132, 1133. This action permits intermittent ratcheting engagement in an interd_igitating fashion. Accordingly, a ratcheting emngagement is perceptible to the usser as the closure elements a_re urged together in an irsterdigitating fashion. In addition , this manner of ratcheting ergagement may generate an audible sound perceptible to the user during the closure operatison. The ratcheting feel may be perceived by the user when the closure elements are Meoccluding. :

[0093] Fig. 24 illustrates another embodiment of the prese=nt invention. In this embodiment, the fastening device includes inner webs with barbe=d surfaces and outer webs with barbed surfaces. The fastening device 1210 includes aa. first-closure element 1212 and a second closure element 1214. The first closure elemert 1212 includes inner webs 1220, 1222 and a base 1216 which are similar to webs 120, 122 and base 116 in “Fig. 9B. While this embodiment employs webs 1220, 1222, othe=r embodiments may use other webs, such as, the webs in Figs. 2-9A, 10-13, and 17-222. The first closure element 1212 also includes outer webs 1232, 1234 which are sinmilar to webs 1132, 1134 in Fig. 23. | oo

[0094] The second closure element 1214 includes inner vevebs 1236, 1238 and a base 1218 which are similar to webs 136, 138 and base 118 in Fig. 9B. While this ‘embodiment employs webs 1220, 1222, other embodiments may use other webs, such as, the webs in Figs. 2-9A, 10-13, and 17-22. The second closur—e element 1214 also includes outer webs 1233, 1235 which are similar to webs 1133, 1135 in Fig. 23.

[0095] "The fastening device 1210 is shown in the occluded position in Fig. 24.

Compression forces are applied to the closure elements 1212, 12214 and the webs are urged into contact with each other. The inner webs engage as no=ted above with respect to Figs. 6-9A and especially Fig. 9B. The outer webs engage as noted above foi Fig. 23.

The ratcheting engagement of the inner webs and outer webs is perceptible to the user as the closure elements are urged together in an interdigitating fashion. In addition, this manner of ratcheting engagement may generate an audible sound. perceptible to the user : during a closure operation. The ratcheting feel may be perceivead by the user when the "closure elements are deoccluding.

[0096] Fig. 25 illustrates another embodiment of the inv ention. In this embodiment, the fastening device includes inner webs with bartoed surfaces and a barbed surface on the base portion of one of the closure elementss. The fastening device 1310 includes a first closure element 1312 and a second closure e=lement 1314. The first closure element 1312 includes inner webs 1320, W322 and abase 1316 wwhich are similar to webs 1220, 12222 and base 1216 in Fig. 24. While this embodiment employs webs 1320, 1322, other embodiments may use other we=bs, such as, the webs in Figs. 2-13 and 17-22. The first ¢ Josure element 1212 includes a barbed surface 1340, 1346 on the base which are similar to surfaces 440, 446 in Fig. 16. While this embodirment employs barbed surfaces 1 340, 1346, other embodiments may use other surfac=es, such as, surfaces 340, 346» in Figs. 14 and 15. }

[0097] The second closure element 13143 includes inner webs 1336, 1338 anda base 1318 which are similar to webs 1236, 1233 and base 1218 in Fig. 24. While this embodiment empwloys webs 1336, 1338, other emmbodiments may use other webs, such as, the webs in Fags. 2-13 and 17-22. The secord closure element 13 14 also includes outer webs 1332,. 1334 which are similar to welos 432, 434 in Fig. 16 .

[0098] Thhe fastening device 1010 is shown in the occluded position in Fig. 25.

Compression fomrces are applied to the closure elements 1312, 1314 zand the webs are urged into contac=t with each other. The inner we=bs engaged as noted &bove with respect to Fig. 24. The Outer webs engage as noted above for Fig. 16. The r=atcheting engagement of thae inner webs and the outer webms is perceptible to the user as the closure elements are urg=ed together in an interdigitating fashion. In addition, this manner of ratcheting engag ement may generate an audible sound perceptible to the user during a closure operatior. The ratcheting feel may be perceived by the user —when the closure elements are deowccluding.

[0099] The closure fastening devices off this invention are preeferably formed from thermoplas:tic materials such as high, medium or low density po-lyethylene or from other resins. Suech fastening devices can readily be manufactured by— known methods such as by extrussion, by the use of molds or other known methods o—f producing such devices. They c.an be manufactured as a strip £or later attachment to a plastic film or they can be formed integral with the film. In thie instance where formed by extrusion, the closure faste=ning devices may be extruded —with or without flangee portions on one or both of the closure elem ents depending on the particular mmanufacturing operations utilized.

[00100] There are various advantages to the fastening - device according to the present invention. For example, the barbed arrangement provides an enhanced feel to the user. Furthermore, the present invention provides an enhmanced feel with an ~ arrangement that provides various points of occlusion. In adcition, the invention, when utilized in an arrangement comprising multiple barbs, may provide step-wise color enhancement to provide various degrees of visual indication. In particular, the usermay perceive different shades of color change depending on the 1-evel of occlusion of the barbs with corresponding hooks when looking at the fastenirag device from the side.

[00101] Accordingly, a closure fastening device that 1_ncludes a first closure element with at least one barbed surface and a second closure element with a complementary mating surface that provides intermittent rat-cheting engagement with the barbed surface that meets the aforestated objectives has been described. In this way, the user perceives a tactile feel as the closure elements are emngaged. It will be apparent to those skilled in the art that a number of modifications car be made to the invention disclosed, particularly by those having the benefit of the foreegoing teachings, without departing from the spirit of these principles. Accordingly, itis intended that the invention be limited only by the scope of the appended clams.

Claims (1)

1. What is claamed is:

   1. An interlocking closure fastening device compris=ing a pair of opposed, longitudinaally extending closure elements @dapted to interlockinmgly engage with each other, the fArst closure element having a firsst barbed surface exte=nding along a segment thereof, and a second closure element inclumding a first complemesntary surface disposed along a segement thereof, said first compler mentary surface being= in engagement with said first barbed surface in an occluded pos=sition, the surfaces providing ratcheting engagemert upon the application of compmession forces to the first and second closure clements.

   2. The invention as in claim 1 wherein said first closure element includes abase and said first barbed surface is oriermted at an angle in the Tange of 0°-90° relative= to said basse. | oo

   3. The invention as in claim 2 wherein said first barbed surface is oriented at an angles of substantially 90° to said basse. :

   4. The invention as in claim = wherein said first cleosure element includes a web and_ said first barbed surface is loca_ted on said web.

   5. The invention as in claim <4 wherein said first baarbed surface includes an plurality oof hooks. :

   6. The invention as in claim <4 wherein said first barbed surface includes aa plurality of saw teeth. :

   7. The invention as in claim «4 wherein said first baarbed surface includes &a + plurality of protrusions. Co

   8. The invention as in claim «4 wherein said first baarbed surface has a serpentine configuration.

   9. The invention as in claim -4 wherein said first ceomplementary surface has a barto.

   10. The invention as in claim 4 wherein said first complermentary surface has a barbeed surface. : © 11. The invention as in claim 10 wherein said barbed surfaces include a plurality of hooks.

   12. The invention as in claim 10 wherein said barbed surf aces include a plurality eof saw teeth. oo

   13. The invention as in claim 14 wherein said barbed surfaces include a plurality of protrusions. "1-4. The invention as in claim 1 0 wherein said barbed surfaces have a serpentirne configuration. oo

   1 5. Theinvention as in claim 3 wherein said first closure element includes two web s and said first barbed surface is 1 ocated on one of said web=s and a second barbed s—urface is located on said other web.

   ~L6. The invention as in claim 1 5 wherein said barbed surfaces include a plurality= of hooks. } WA The invention as in claim 15 wherein said barbed sur—faces includea plurality of saw teeth. : :

   8. The invention as in claim 15 wherein said barbed sumrfaces include a plurality, of protrusions. : “19. The invention as in claim 15 wherein said barbed suzxrfaces havea - serpentine configuration. oo

   20. The invention as in claim 15 wherein said first complementary surface has a barb.

   21. The invention as in claim 15 wherein said first complementary surface has a barbed surface and said second clos ure element includes a seceond complementary surface. said second complementary surfZace has a barbed surface. -

   22. The invention as in claim 21 wherein said barbe=d surfaces include & plusrality of hooks. : :

   23. The invention as in ckaim 21 wherein said barbe=d surfaces include aa plurality of saw teeth.

   24. The invention as in claim 21 wherein said barbe=d surfaces include a pluarality of protrusions. :

   25. The invention as in ¢ laim 21 wherein said barbeed surfaces have a semrpentine configuration.

   26. The invention as in claim 15 wherein said barb - ed surfaces face invwvard.

   27. The invention as in claim 15 wherein said barbe=d surfaces face out—ward. oo 28. The invention as in claim 15 wherein said first barbed surface has a different configuration than said second barbed surface.

   29. The invention as in claim 3 wherein said first Closure element incl udes a first web, a second web, a third web and a fourth web, said fimrst barbed surface located om said first web, said second web ircludes a second barbed sumrface, said second bearbed starface oriented at an angle of substantially 90° to said base, ssaid third web inclu des a thaird barbed surface, and said fourth web includes a fourth ba_rbed surface.

   30. The invention as in claim 29 wherein said third weeb is parallel to saidl base.

   31. The invention as in claim 29 wherein said third w=eb is oriented at an angle gmreater than 0° relative to said base .

   32. The invention as in «claim 2 wherein said first closure element incJudes a base and said first barbed surface is substantially parallel to said base.

   33. The invention as in claim 32 wherein said first bamrbed surface is inte_gral with said base.

   34. The invention as in claim 32 wherein said first barbed surface inc-ludes a_ plurality of saw teeth.

   35. The invention as in claim 32 wherein said first barbwed surface includes a pRurality of protrusions.

   36. "The invention as in claim 32 wherein said second c-losure element inc ludes a web and said first complementary surface is disposed along said web. 37 The invention as in cLaim 32 wherein said first clos-ure element includes a seecond barbed surface. :

   38. The invention as in claim 37 wherein said second barbed surface is substantially parallel to said base.

   39. The invention as in claim 37 wherein said second closure element _ includes a web and a second complementary surface along said web. oo

   40. The invention as in c laim 37 wherein said second Barbed surface is ormented at an angle of substantially 90° to said base.

   41. Theinvention as in claim 36 wherein said first complementary surface inccludes a barb. a

   42. A container comprising two opposed sidewalls ancl an interlocking : fasstening device, the fastening device including a first closure element secured to one = of the sidewalls, the first closure element having a first barbed susrface along a segment theereof, and a second closure element secured to the second sidewall, the second . cleosure element including a first cormplementary surface along a segment thereof, said first complementary surface being im mated interlocking engagement with said first bamrbed surface in an occluded position, the surfaces providing rat cheting engagement whhen urged from an deoccluded position to the occluded positiorm.

   43. Theinvention as in claim 42 wherein said first clo=sure element includes a Wbase and said first barbed surface i s oriented at an angle in the range of 0°-90° relative to. said base. :

   44. The invention as in «claim 43 wherein said firsst barbed surface is orientec8 at z2an angle of substantially 90° to said base.

   45. The invention asin claim 44 wherein said first closure element includess a web and said first barbed surfaces is located on said web.

   46. The invention as in_ claim 45 wherein said fimrst barbed surface includes a plurality of hooks.

   47. The invention as irm claim 45 wherein said first barbed surface includes a plurality of saw teeth.

   48. The invention as ir claim 45 wherein said fi_rst barbed surface includes a plurality of protrusions.

   49. The invention as ir claim 45 wherein said fmrst barbed surface has a se-xpentine confi guration. a

   50. The invention as ira claim 45 wherein said fmrst complementary surfaces hams a barb. : : oo

   51. The invention as im claim 45 wherein said fSrst complementary surface has a barbed surface. a

   52. The invention as im claim 51 wherein said bearbed surfaces include a pliurality of hooks. - :

   53. The invention as imn claim 51 wherein said toarbed surfaces include a pliurality of saw teeth. : -

   54. The invention as im claim 51 wherein said barbed surfaces include a pMurality of protrusions. :

   Ss. The invention as im claim 51 wherein said toarbed surfaces have a se=mentine configuration.

   56. _ The invention as in clairm 44 wherein said first closuree element includes two webs and said first barbed surface is located on one of said webss and a second barbed surface is located on said other “web.

   57. The invention as in claimm 56 wherein said barbed surfaces include a pluraliity of hooks. :

   58. The invention as in claim 56 wherein said barbed surfaces include a plurality of saw teeth.

   59. The invention as in clai m 56 wherein said barbed sumfacesincludea - plural-ity of protrusions.

   60. The invention as in claim 56 wherein said barbed sumrfaces have a serperntine configuration.

   61. The invention as in claiim 56 wherein said first complementary surface has a “barb.

   62. The invention as in clamm 56 wherein said first complementary surface has a “barbed surface and said second closure element includes a seceond complementary surface, said second complementary swurface has a barbed surface.

   63. - The invention as in cla-im 62 wherein said barbed su rfaces include a plurality of hooks. -

   64. The invention as in cla-im 62 wherein said barbed surfaces include a plurality of saw teeth.

   65. The invention as in cla_im 62 wherein said barbed sumrfaces include a plurality of protrusions. : : 66. The invention as in cla_im 62 wherein said barbed sumrfaces have a serpentine configuration.

   67. The invention as in cla_im 56 wherein said barbed svarfaces face inward. : 68. The invention as in cladm 56 wherein said barbed surfaces face outward. 34 oo

   6% The invention as in clam 56 wherein said first bzarbed surface has a different configuration than said secord barbed surface.

   7+0. The invention as in claim 44 wherein said first closure element includes a first wesb, a second web, a third web zand a fourth web, said firs& barbed surface located on said first web, said second web includes a second barbed surf=Zace, said second barbed surface oriented at an angle of substantially 90° to said base, said third web includes a third bar~bed surface, and said fourth vaveb includes a fourth barbeed surface.

   2%1. The invention as in claim 70 wherein said third webs is parallel to said base.

   2. The invention as in claim 70 wherein said third wel is oriented at an angle greater t_han 0° relative to said base.

   ~73. The invention as in claim 43 wherein said first c-losure element includes a base amnd said first barbed surface is substantially parallel] to s=aid base.

   —74. The invention as in claim. 73 wherein said first bart>ed surface is integral with saied base. 5 ’ 775. The invention as in claim 73 wherein said first barbed surface includes a plural®mty of saw teeth.

   “76. The invention as in clzaim 73 wherein said first barbed surface includes a pluralmty of protrusions.

   “71. The invention as in claim 73 wherein said secord closure element includess a web and said first complermentary surface is dispose=d along said web. :

   ~78. The invention as in cl=im 73 wherein said first closure element includes a seconcd barbed surface.

   ~79. The invention as in cl.aim 78 wherein said secornd barbed surface is substanTtially parallel to said base. . :80. The invention as in cl aim 78 wherein said secornd closure element includess a web and a second complemmentary surface along sai] web.

   81. The invention as in claim 78 wherein said second barbeed surface is oriented at an angle of substantially 90° to sad base. :

   82. The invention as in claim 77 vavherein said first complementary surface includes a Barb.