Abstract: In order to allow a bag to be easily unsealed by sliding both sides of the bag in a longitudinal direction of a zipper tape irrespective of the rigidity of the zipper tape, a zipper-tape bag according to an aspect of the invention includes: a bag body including at least a pair of facing surfaces; and an elongated zipper tape whose cross sectional profile includes first and second bases each bonded to corresponding one of facing surfaces, and mutually engageable first and second engagement portion respectively protruded from the first and second bases, the zipper tape including an intermediate hinge at at least one point in the longitudinal direction.

Abstract: A magnetic buckle device has a buckle main body and an inserting head. When the inserting head is close to an insertion hole of the buckle main body, the magnetic attraction force between a first component on the inserting head and a second component on the buckle main body can assist with inserting the inserting head into the insertion hole. After the inserting head is inserted to a predetermined position, the magnetic attraction force will keep the buckle main body in an engaged state even without any additional fixing means. When the buckle main body is switched to a disengaged state and the inserting head is moved out of the buckle main body, the magnetic attraction force attracts the inserting head to attach to the buckle main body, and thereby, after moved out, the inserting head cannot move arbitrarily.

Abstract: A reclosable child-resistant plastic zipper assembly of manufacturer definable length is disclosed. The assembly has a first zipper strip and a second zipper strip, the zipper strips having complementary reclosure profiles. The zipper assembly lacks upper flanges, but instead terminates at a pair of closure tabs that meet at an opening point when the strips have been mated to provide the closure. The zipper strips each further include a texturized gripping region on the exterior surfaces to enable a user to open the zipper assembly. The assembly may be affixed to the upper end of a bag or other flexible container to provide child-resistant access to the contents therein.

Abstract: A line guide device for lines like for example cables, hoses or the like, in particular for a clean room application, which has a flexible sheath. The sheath is designed in the manner of a corrugated tube and has a corrugated profile for the purposes of flexibility. The sheath has an asymmetric bending characteristic in relation to curvature about the direction-changing axis and to opposite curvature such that the permitted bending sag is considerably less than the desired curvature. There is proposed a particular configuration of shell portions for constructing the sheath, in particular in respect of the corrugated profiles and the fixing of the shell portions. A further aspect concerns a supporting skeleton for a corrugated tube.

Abstract: A recloseable zipper closure arrangement useable in a recloseable plastic bag includes a first elongate base strip having a front side and an opposite back side; and a first continuous profile member on the front side of the first elongate base strip; the first continuous profile member having a clicking sensory indicator having a central rib with a continuous peak; and a second continuous profile member on the front side of the first elongate base strip and spaced from the first profile member; the second continuous profile member may have optionally a clicking sensory indicator having a central rib with a continuous peak.

Abstract: A zipper tape includes a pair of belt-shaped bases bondable to a film of a bag body, and mutually engageable engagement portion each integrally provided to corresponding one of the belt-shaped bases. One of the belt-shaped bases includes at least two portions having different bonding strengths to the film on a side opposite a side provided with the engagement portion and between an edge of the one of the belt-shaped bases in a width direction orthogonal to a longitudinal direction to a point at which the engagement portions are provided. A bonding strength of a first portion of the at least two portions to the film may be larger than a bonding strength of a second portion to the film.

Abstract: A storage bag includes first and second zipper profiles provided adjacent to an opening to the interior of the bag. The first and second zipper profiles are provided with opposing closure elements that respectively interlock with each other. The storage bag further includes first and second isolation sections between the first and second zipper profiles and a slider to occlude and to de-occlude the closure elements of the first and second zipper profiles. The slider includes a first zipper profile opening member and a support member with a second zipper profile opening member that is (i) disposed between the first and second isolation sections, and (ii) separate and distinct from the first zipper profile opening member.

Abstract: A garment extender including: a body provided with an attachment at each side thereof, each of the attachments defining a channel and a slit leading laterally into the channel. When the attachment is operatively secured to a garment slide fastener of a garment, a gripped portion of one of the stringer tapes of the garment slide fastener is inserted in the slit and the channel receives thereinto teeth that are supported by the stringer tape adjacent the gripped portion.

Abstract: A child resistant slider includes a top member and a pair of spaced legs depending from the top member. At least a first leg of the spaced legs has a first tang projecting laterally away from a remaining portion of the first leg and a remaining portion of the slider. The first tang has a separator plow. The tang can be movable to move the first plow into a position to separate interlocked male and female tracks of a zipper closure. In other examples, both legs include a projecting tang having a separator plow.

Abstract: The present disclosure relates to a closure for a reclosable package wherein the product side flanges include opposing air pockets thereby allowing a user to more easily grab the product side flanges or the package walls. In a second embodiment of the disclosure, the opposing air pockets are adjacent to the interlocking elements of the closure. In a further aspect of the disclosure, a closure includes a small sack or air or other fluid adjacent to the closure profiles. When closed, the closure creates a leak resistant configuration. By pressing the air sack, the user separates the closure profiles.

Abstract: A hook and loop fastener includes a first strip having one of loops or hooks and a second strip having another of the loops or the hooks. The first strip has a first longitudinal track orthogonal to the first strip. The second strip has a second longitudinal track, orthogonal to the first longitudinal track. A slider is provided that has an interface disrupting member extends outwardly. A gripping element is provided for manually moving the slider along the first longitudinal track and the second longitudinal track in a first direction and a second direction. Movement of the slider in the first direction brings the first strip into engagement with the second strip. Movement of the slider in the second direction draws the interface disrupting member through the interface between the first strip and the second strip, thereby separating the first strip and the second strip.

Abstract: The present disclosure relates to a leak-resistant slider zipper. The zipper typically includes end seals at the opening and closing ends of the zipper, an upper and a lower set of interlocking elements, first and second upper flanges above the upper interlocking elements having no gaps or cut-outs therein, and first and second lower flanges below the lower interlocking elements, one of the lower flanges being folded back on itself, and a slider.

Abstract: A waterproof, open-end zipper includes a first zipper tape with a first engagement rail unit, a second zipper tape with a second engagement rail unit, a zipper slider slidable to force the first engagement rail unit and the second engagement rail unit into engagement with each other or separate them from each other, a box located at one end of the first engagement rail unit for receiving one end of the second engagement rail unit, a locating rod fixedly located at the first engagement rail unit, and a locating hole located at the second engagement rail unit for receiving the locating rod after insertion of the second engagement rail unit into the box to prohibit relative displacement between the first and second zipper tapes.

Abstract: A container sealing system and a container feature are disclosed. The container sealing system includes one or more seals encompassing a container opening, wherein the one or more seals are interlockable or otherwise engageable to seal the container when activated; a first slider head including a male fitting coupled to the one or more seals; and a second slider head coupled to the one or more seals and opposing the first slider head, and including a female fitting for receiving and coupling the male fitting. Actuation of at least one of the slider heads such that the male fitting contacts the female fitting couples the one or more seals encompassing the container opening, sealing the container. The container sealing system may be child-resistant, may be resealable, and/or may include a tamper-indicating feature. The container including the container sealing system may be used for containing, storing, or transporting materials that are not suitable for handling or consumption by a child.

Abstract: A fresh-keeping bag is provided with a zipper assembly including a slider and a zipper. The slider comprises two limiting pieces arranged in parallel and each provided with two limiting blocks, one connecting block, and an opening tongue located between the two limiting pieces and connected with the connecting block. The zipper comprises two single-chains, each provided with two toothless hooks arranged in parallel and respectively arranged on the two single-chains to cooperate with each other one to one; one of the two toothless hooks on each single-chain is provided with an auxiliary track on one side thereof; and the auxiliary tracks respectively arranged on the two single-chains are disposed oppositely The opening tongue props open the toothless hooks indirectly, eliminating the possibility of moisture flowing out between the opening tongue and the toothless hooks. Fresh-keeping bags applied with such zipper assembly prevent moisture from flowing out from the opening.

Abstract: A hinged slider for a closure assembly of a bag. The hinged slider includes a top wall, a pair of legs that extends vertically from the top wall, and a pair of wings hingedly attached to the pair of legs. In one embodiment, the pair of wings hinges upwardly in order to install the slider onto the closure assembly. In another embodiment, the pair of wings hinges downwardly in order to install the slider onto the closure assembly. A storage bag is also provided, in which the storage bag includes at least one zipper profile and a hinged slider in a straddling relation with the zipper profile.

Abstract: A closure mechanism includes a slider that slides along first and second elongate closure members to engage or to separate the members. The slider interacts with (i) a first series of regularly spaced features on the first elongate closure member to produce a first feedback at a first frequency, (ii) a second series of regularly spaced features on the first elongate closure member to produce a second feedback at a second frequency, and (iii) a series of regularly spaced features on the second elongate closure member to produce a third feedback at a third frequency, the first, second, and third feedbacks being produced when the slider is slid along the first and second elongate closure members. The spacing of the regularly spaced features on the closure members are different from each other such that the first, second, and third frequencies are different from each other.

Abstract: The present disclosure relates to a one piece multi-rib fastener including at least two groups of ribs, each rib with one or more hooks, wherein the groups are separated by a space less than the width of the maximum number of ribs within one of the groups.

Abstract: A closure mechanism includes a slider that slides along first and second elongate closure members to engage or to separate the members. The slider interacts with (i) a first series of regularly spaced features on the first elongate closure member to produce a first feedback at a first frequency, (ii) a second series of regularly spaced features on the first elongate closure member to produce a second feedback at a second frequency, and (iii) a series of regularly spaced features on the second elongate closure member to produce a third feedback at a third frequency, the first, second, and third feedbacks being produced when the slider is slid along the first and second elongate closure members. The spacing of the regularly spaced features on the closure members are different from each other such that the first, second, and third frequencies are different from each other.

Abstract: A zipper for use in a reclosable bag including an elongated groove profile having two arms which form a general U-shape to define an opening to a channel, and an elongated rib profile opposing the groove profile. A plurality of first segments of the rib profile alternate with a plurality of second segments of the rib profile to create a structural discontinuity along a length thereof. The first segments have larger cross-sections and shorter lengths than the second segments such that interlocking the groove and rib profiles creates the audible clicking sound when the groove and rib profiles are engaged.

Abstract: A double-layer open-end zipper and double-layer 3-in-one open-end zipper and the related fabrication method is disclosed. The double-layer open-end zipper are made by performing a coil spiral and broad-width fabric tape stitching step, a dyeing and drying set, a gapping size setting step, a splitting, folding and calibration step and a glue heating and bonding or stitching step to form a single-sided double-layer zipper chain tape, and then performing a zipper slide coupling step, a ultrasonic patch sealing and T cut hole punching step, a box with small guider and pins with groove fixation step, a zipper slide functioning checking step and a top stop fixation step to obtain the desired finished double-layer open-end zipper.

Abstract: A closure mechanism includes a first elongate closure member that sealing engages with a second elongate closure member. A slider slides along the first and second elongate closure members to engage or to separate the first and second elongate closure members. The first elongate closure member includes a first series of regularly spaced features that interacts with the slider to produce a first feedback at a first frequency and the second elongate closure member includes a second series of regularly spaced features that interacts with the slider to produce a second feedback at a second frequency. The first feedback and the second feedback are produced simultaneously when the slider is slid along the first and second elongate closure members.

Abstract: The present disclosure relates to zipper assemblies and, in particular, child-resistant zipper assemblies. The zipper assemblies may be used with packaging material to make child-resistant packages.

Abstract: A reclosable zipper is disclosed which includes a first profile containing a first interlocking element and a first product side flange. A second profile is provided which contains a second product side flange and a second interlocking element for reclosably interlocking with the first interlocking element. A sachet is provided on a flange either on the product or consumer side or extending between the first and second flanges.

Abstract: A zipper in which a male member having a male interlocking section and a female member having a female interlocking section that fits with the male interlocking section are peelable and re-fittable is provided. The male member and the female member are formed by different resins, and at least the male interlocking section and the female interlocking section are peelably adhered or contacted with each other with substantially no gap.

Abstract: A fastener including a pair of base members formed in the shape of a band and a claw unit formed between the pair of the base members, and the claw unit engages the base members with each other and seals a gap between the base members. The claw unit includes a sealing unit and an engaging unit. The sealing unit includes a male claw and a female claw that receives the male claw so as to make an area between the claws liquid-tight or air-tight. The engaging unit includes a pair of hooks. A side wall of the female claw of the sealing unit is formed as a restricting part that prevents a displacement of one hook of the engaging unit in a separation direction.

Abstract: A storage bag has first and second closure profiles adjacent to an opening to the interior of the bag. The first and second closure profiles are provided with dimples that are aligned opposite to each other. The dimples of the first closure profile are formed as a concave surface on the side of the first closure profile facing the interior of the bag and a convex surface on the side of the first closure profile facing the outside of the bag. The dimples of the second closure profile are formed as a convex surface on the side of the second closure profile facing the interior of the bag and a concave surface on the side of the second closure profile facing the outside of the bag. The dimples of the first closure profile are at least partially within the dimples of the second closure profile when the bag is being sealed.

Abstract: The present disclosure relates to a leak-resistant slider zipper. The zipper typically includes end seals at the opening and closing ends of the zipper, an upper and a lower set of interlocking elements, first and second upper flanges above the upper interlocking elements having no gaps or cut-outs therein, and first and second lower flanges below the lower interlocking elements, one of the lower flanges being folded back on itself, and a slider.

Abstract: A storage bag has a first fastener strip positioned adjacent to an opening of the bag that includes at least one interlocking profile. A second fastener strip positioned adjacent to the opening of the bag also includes at least one interlocking profile. A slider includes a first sidewall, a second sidewall, and a top wall connecting the first sidewall and the second sidewall. The slider includes (a) a plurality of ridges extending from a first sidewall, the plurality of ridges extending farther from the first sidewall at the ends of the slider than at a position at the center of the length of the slider, and (b) a plurality of ridges extending from a second sidewall, the plurality of ridges extending further from the second sidewall at the ends of the slider than at a position at the center of the length of the slider.

Abstract: There is provided a slide fastener. A pair of fastener tapes is formed with a pattern on a front surface thereof. A pair of fastener element rows is respectively provided along opposing side edge portions of the pair of fastener tapes. A slider is configured to engage and disengage the pair of fastener element rows. A film member is fixed to the front surface of the pair of fastener tapes such that the pattern is visible. The film member is provided with a concave-convex shape on a surface thereof. The pattern of the fastener tapes and the concave-convex shape of the film member are respectively related to a pattern and a concave-convex shape of one of (a) animal skin, (b) a woven or knitting which is formed by performing weaving or knitting of fibers or bamboo strips, (c) woodgrain, and (d) stone pitching.

Abstract: A vacuum press fit zipper assembly designed for watersports apparel and gear and other water related applications. Overmolding construction forms an effective seal around the entire perimeter of the fastener assembly, and a vacuum fit is created between the two mating portions of the zipper assembly.

Abstract: A slider is provided which can be mounted on a zipper without any pre-activation, particularly zippers which are opened by squeezing together a portion of the profiles wherein a fulcrum effect is achieved to separate the profiles. The slider omits at least part of the zipper opening elements so that the user must squeeze the slider together in order to urge the zipper profiles apart thereby opening the zipper.

Abstract: A reclosable bag includes first and second side edges and a double zipper, which includes first zipper with first side seal adjacent the first side edge and second side seal adjacent the second side edge. The double zipper includes second zipper having third side seal adjacent the first side edge, and fourth side seal adjacent to the second side edge. One of the first side seal and third side seal has an end that is spaced closer to the second side edge than the other. A method for providing a sensory indication of double sealing in a reclosable bag includes closing a mouth by pressing opposing fingers against first and second zipper closures and moving opposing fingers linearly across the closures until there is a sensory indication of an end seal for each of the first and second zipper closures at different linear locations.

Abstract: A security zipper is provided, which includes a consumer side zipper pair and a product side zipper pair, where each zipper pair is capable of secure mating. Between the zipper pairs is an intermediate flange pair which is layered with an adhesive as well as an adhesive enhancer to securely connect the intermediate flange pair. A slider is provided over the consumer side zipper pair, the product side zipper pair and the intermediate flange pair which mates the zipper pairs and connects the intermediate flanges so that the zipper is securely closed. A bag is also disclosed, which includes the security zipper and a connected product side pouch. In addition, a method for manufacturing the bag is disclosed.

Abstract: A reclosable zipper is illustrated, which includes a first profile having a first interlocking element, a first consumer side flange with a first consumer side intermeshing contour and a first product side flange with a first product side intermeshing contour. The zipper includes a second profile which includes a second interlocking element, a second consumer side flange with a second consumer side intermeshing contour, and a second product side flange with a second product side intermeshing contour. The first and second consumer side intermeshing contours are complementary intermeshing contours and the first and second product side intermeshing contours are complementary intermeshing contours. As a result, when the interlocking elements are engaged, the first and second consumer side intermeshing contours are capable of intermeshing and the first and second product side intermeshing contours are capable of intermeshing.

Abstract: This present invention concerns a closure assembly that has two complementary elements which are capable of being successively joined and separated, and a slider that includes a base, two lateral walls, a low central ridge and a soleplate connected to the low central ridge, characterized by the fact that at least one of the two elements has, on its inside surface, a structure that is capable of being pressed against the soleplate under the effect of a pulling force so that, under the effect of this force, the said element tends to be flattened against the associated lateral wall of the sider.

Abstract: This engaging member includes a male part and a female part each of which is capable of engaging with each other, in which each of the male part and the female part has a welded part to a main body of a bag and a part other than the welded part, at least the welded part is formed by a resin composition including (A) a polypropylene type resin having a maximum melting peak temperature measured by a differential calorimeter of not more than 145° C., and a melt flow rate ranging from 0.5 g/10 min. to 20 g/10 min., and (B) a polybutene type resin having a maximum melting peak temperature measured by a differential calorimeter of not more than 130° C., and a melt flow rate ranging from 0.1 g/10 min. to 20 g/10 min.

Abstract: A recloseable pouch defining an interior including a first wall, a second wall opposing and partially sealed to the first wall to form an opening, and a closure mechanism for selectively sealing the opening. The closure mechanism includes a female closure element having first and second spaced legs extending from the first wall that are substantially symmetric about a longitudinal centerline and defining female sealing surfaces. The closure mechanism also includes a male closure element including a proximal base portion extending from the second wall, a neck portion forming male sealing surfaces to engage the female sealing surfaces, and a distal head portion. The male closure element has a plurality of intermittent deformed portions so that upon inserting the proximal base portion into the female closure element, the female closure element deflects and, in turn, fluid is allowed to flow past the closure mechanism via the adjacent intermittent portions.

Abstract: A closure strip for a bag. Two supporting webs are provided, on their internal surfaces facing each other and at a distance from their longitudinal edges, with at least one longitudinal closure assembly. Each web has an upper portion, extending longitudinally in an upper portion thereof, and a lower portion, extending longitudinally in a lower portion of these. At least one of the webs includes internal faces which correspond to the faces of the upper and lower portions made in materials having different melting temperatures. The melting temperature of the material of the upper portion is less than the melting temperature of the material of the lower portion. The closure strip also includes a line of weakening which extends longitudinally in an intermediate area of each web. The intermediate areas are made of a third material having a lower tensile strength than the upper and lower portions.

Abstract: A vacuum press fit zipper assembly designed for watersports apparel and gear and other water related applications. Overmolding construction forms an effective seal around the entire perimeter of the fastener assembly, and a vacuum fit is created between the two mating portions of the zipper assembly.

Abstract: A sachet has a body, the inner space of which is notably delimited by two sheets forming its main walls, and which includes complementary closing profiles respectively attached on these sheets as well as a cursor for actuating the profiles upon closing and opening, which comprises two longitudinal flanks connected by a base, as well as a longitudinal sole which extends from the base between the flanks, in order to delimit two opening/closing channels of the profiles. The cursor includes, longitudinally, in the extension of the base, a jutting-out element which extends beyond the flanks. The jutting-out element is positioned on the side of the cursor which corresponds to a closing direction of the profiles.

Abstract: The slide fastener includes elements and a slider, wherein each of the elements includes a horizontal functional section an upper vertical functional section and a lower vertical functional section the slide fastener includes a plurality of fastener units in each of which the elements are arranged to oppositely face each other and the meshing portions are meshed with each other by sliding the slider between the oppositely-positioned elements, whereby the engagement pieces of the oppositely-positioned elements form an engagement portion and the engagement holding pieces of the oppositely-positioned elements in pair form an engagement holding portion, and the plurality of fastener units are constituted in a multilayered structure by engaging the engagement holding portions of a second fastener with the engagement portions of a first fastener such that the engagement holding portions of a new fastener unit are engaged with the engagement portions of a preceding fastener unit.

Abstract: Method of making an end termination on a reclosable fastener includes providing a reclosable fastener including a first track with a first profile and a second track with a second profile. The first track has an end portion and the second track has an end portion. The first and second profiles are releasably engageable to each other. A plastic slider is slidably mounted to the fastener for movement between an open position and a closed position, and the slider has a separating finger. An end termination is formed at the end portions of the first and second tracks, and the end termination has a shape corresponding to the separating finger.

Abstract: A tamper evident structure (10) for flexible packages is disclosed to include a slider-zipper assembly (100) and a tamper evident diaphragm (200). The slider-zipper assembly includes a slider (102) engaged with a zipper (104). The zipper includes a longitudinal male element (106) engageable to a longitudinal female element (108), a first flap (114) and a second flap (116) extending downwardly along the respective length from the longitudinal male and the longitudinal female element. Further, the tamper evident diaphragm includes a plurality of temperature sensitive ribs (202) configured along the length on an outer surface thereof, and a pressure sensitive weak line (204) configured centrally along the length of the tamper evident diaphragm.

Abstract: A slider actuated closure mechanism includes internal projections that extend from interior sides of the closure elements and retention members that extend from exterior sides of the closure elements. A slider is disposed over the first and second closure elements and includes first and second sidewalls each including a shoulder inwardly extending from a distal end thereof. When the slider is disposed over the first and second closure elements, the first sidewall and the first closure element are minimally horizontally separated by a distance d1, the second sidewall and the second closure element are minimally horizontally separated by a distance d2, and the internal projections are horizontally separated by a distance d3. The sum of the distances d1, d2, and d3 equals a total non-zero distance, dt, that is less than a length that each of the shoulders inwardly extends from the respective first and second sidewalls.

Abstract: After engagement of a male belt-like member and a female belt-like member are disengaged, a void portion is formed by punching the female belt-like member with a die. The female belt-like member having the void portion and the male belt-like member are re-engaged with each other and fed between a folded base material film that is continuously fed. A male belt-like base and a female belt-like base are heat-sealed. A seal bar heat-seals the base material film to form a bottom seal portion. A side seal bar heat-seals the base material film to form side seal portions. The cutter cuts the base material film in the middle of the side seal portions to produce the packaging bag in which three sides of the bottom seal portion and the side seal portions are heat-sealed.

Abstract: A closure mechanism for a reclosable pouch includes a female profile having first, second, and third legs extending from a base of a first closure element. A first sealing flange is attached to each of the first and second legs, with a slit disposed through the first sealing flange to define a first sealing flap that depends from the first leg and a second sealing flap that depends from the second leg. A second sealing flange is attached to each of the second and third legs, with a slit disposed through the second sealing flange to define a third sealing flap that depends from the second leg and a fourth sealing flap that depends from the third leg. A first male profile extends from a base of a second closure element. The first male profile engages a portion of the first and second sealing flaps to form a seal therebetween when the respective male and female profiles are occluded. A second male profile extends from the base of the second closure element.

Abstract: A reclosable fastener having a one-way valve interposed between first and second sets of interlocking members permits fluid flow in one direction through the fastener and blocks fluid flow in an opposite direction through the fastener.

Abstract: A reclosable locking tape for releasably attaching a fabric add-on to a foundation includes: (a) a substantially planar tape base to which is affixed at least one male locking portion that is generally mushroom-shaped and includes a stem affixed to a cap; and (b) at least one female locking portion affixed to the tape base, the female locking portion including two same-sized hook members on opposite sides of a male portion-sized space in the female portion. Also included are a reclosable rib and groove tape assembly that includes: (a) a fabric add-on including at least one longitudinally extending rib or groove on a substantially planar and flexible portion backing; and (b) a separate foundation attachment portion including at least one rib or groove on a substantially planar portion backing, the rib or groove of the foundation attachment portion corresponding to the rib or groove of the add-on attachment portion, and a related method.

Abstract: In a metal zipper, each metal tooth has a mounting hole located on one end of the base thereof, two first engagement portions and two second engagement portions formed integral with the base at two opposite sides of the mounting hole for engaging into the top and bottom sides of the inner edge of the respective zipper tape to deform the respective inner edge during installation so that engagement between the zipper tape and the metal tooth is enhanced, avoiding vibration of the metal tooth relative to the zipper tape during operation of the metal zipper and prolonging the lifespan of the metal zipper. Further, each metal tooth has a concave surface portion formed in the protruding tooth head thereof so that less friction is produced when the metal zipper is closed or opened.