Abstract: A reclosable zipper fastener has a slider 40 and first and second profiles 24, 26. Each profile has a body 32, 34 and a flange 28, 30 which has three zones which are, successively and in the direction away from the body, an anti-seal zone 42, 43, a line-of-weakness formation zone 44, 45 and a sealing zone 46, 47. The zipper can be used in a bag in which it is secured internally of a top seal 20, the line-of-weakness zones 44, 45 forming lines along which a top portion of the bag can be removed to open the bag. The bag can then be sealed using the zipper. A tamper-evident feature is thus provided.

Abstract: The self-standing bag comprises a package for accommodating a content, a port provided in the center of the top portion of the package, and reinforcing members formed of a thermoplastic resin which cover the outer faces of both side edges of the package. The lower end portion of the reinforcing member is located above the bottom edge of the package. The lower end portion of the reinforcing member is projected inward of a lower cutout.

Abstract: To provide a check valve and a sealing bag that are high in certainty of the checking effect and prevented as much as possible from increasing in the production cost.

Abstract: A form, fill and seal system having a product fill assembly, a tube forming assembly and a fitment securing assembly. The system allows for the relative positioning of the fitment that is to be applied to the film that forms the bags, at various points along the film by having the fitment securing assembly relatively positionable with respect to the tube forming assembly. In turn, with adjustments, a fitment can be located at a number of locations on a finished bag.

Abstract: The present invention relates to a device for applying runners (32) on closure profiles (22), comprising various actuator means (110, 120, 130, 140) driven by a common driving means (150), including a wheel (110) for driving a chain of runners (32) temporarily linked together by breakable bridges (34) in order to transfer successively each runner (32) towards an application station on the closure profiles (22); characterized in that the device includes means (170) for manually disengaging the driving wheel (110) relative to the other actuator members (120, 130, 140). The invention also relates to a method and a machine implementing the above-mentioned runner application device, and to the closure profiles and bags thus obtained.

Abstract: A zipper member type of closure mechanism is mounted to a bag by adhesive materials having contrasting characteristics selected for providing advantages. The closure mechanism is mounted proximate an opening of the bag, so that the closure mechanism is positioned for use in opening and closing the bag.

Abstract: A package having a recloseable pour spout is disclosed, with the package including front and rear package panels which may be joined at respective side edges thereof by inwardly extending side gussets. An upper edge portion of the package is removable, including one of the side gussets, to form a pour spout for dispensing the contents of the package. A fastener strip, which can be detachably connected to itself, extends between confronting inside surfaces of the front and rear package panels, adjacent to the pour spout, whereby the pour spout can be conveniently closed after the package is initially opened. The package can include a longitudinal seal which extends from adjacent the pour spout to overlap the fastener strip.

Abstract: A machine is disclosed for securing a closure system onto a discrete pouch. The machine includes first, second and third stations. The first station is capable of advancing discrete pouches and lifting and folding a portion of a first major surface of each pouch upon itself to form a lip, and exposing an inner surface of a second major surface. The second station is capable of positioning and attaching a closure system transversely across the exposed inner surface. The closure system includes a track having first and second legs each having an outer surface. The first and second legs are joined together by an opening/closing mechanism which includes a movable member capable of being moved back and forth. The third station is located downstream from the second station and is capable of unfolding the lip and securing opposite ends of the lip to the outer surface of the second leg.

Abstract: A valve (20) is provided for sealing an evacuation port (16) in a port area (18) of a wall structure (12) of a container. The valve (20) comprises a casing (22) having a shell portion (30) which is deformable from an open condition, whereat the shell portion (30) forms a chamber (32) over the port area (18), and a closed condition, whereat the shell portion (30) contacts the port area (18). When the shell portion (30) is in its open condition, gas exits from the chamber (32) through gas-releasing holes (24) in the casing (22). When the shell portion (30) is deformed to its closed condition, a port-sealing adhesive (26) adheres to the port area (18) to thereby seal the evacuation port (16).

Abstract: A flexible film pouch includes an aperture to access its contents, and a closure means such as a re-sealable spout is applied over the aperture to permit sealed storage of the contents after opening. The closure means is attached to the flexible film pouch by means of a patch that is bonded to the inside of the pouch adjacent to the aperture. The patch is selected to have a mating surface that bonds with the inner surface of the pouch, where such bonding is preferably conducted by ultrasonic welding or adhesive bonding. The patch itself may have a hole that permits access to the contents of the pouch, or the closure means may include a cutting surface that tears a portion of the patch to permit access.

Abstract: A machine is disclosed for securing a closure system onto a discrete pouch. The machine includes first, second and third stations. The first station is capable of advancing discrete pouches and lifting and folding a portion of a first major surface of each pouch upon itself to form a lip, and exposing an inner surface of a second major surface. The second station is capable of positioning and attaching a closure system transversely across the exposed inner surface. The closure system includes a track having first and second legs each having an outer surface. The first and second legs are joined together by an opening/closing mechanism which includes a movable member capable of being moved back and forth. The third station is located downstream from the second station and is capable of unfolding the lip and securing opposite ends of the lip to the outer surface of the second leg.

Abstract: Horizontal form fill seal apparatus for making flexible packages with slider fastener closures is provided. Various types of fastener tracks are applied in-line with a plastic web and are bonded thereto. All package components are brought together at the point of fill. Flexible packages are provided with shrouded and unshrouded slide fastener closures.

Abstract: A spout mounting method and a spout that enable smooth and high-speed mounting of the spout onto a pouch. The method includes an insertion step of inserting the spout (S) into the pouch (P) so that a mounting portion (IP) of the spout (S) is held between not-yet-sealed opening edges, a temporary fixation step of temporarily fixing the spout (S), inserted in the pouch (P), to the pouch (P), and a sealing step of fixing the mounting portion (IP) of the spout (S), temporarily fixed to the pouch (P), to the opening edges of the pouch (P) by heat-sealing. In the temporary fixation step, the opening edges of the pouch (P) are fixed together by spot-sealing near edges on both sides of the mounting portion (IP) of the spout (S) so that the spout (S) is held by the opening edges of the pouch (P).

Abstract: A process for manufacturing reclosable bags (30) by forming a film (50) includes moving the film (50) and attaching to the film (50) sequentially and crosswise with reference to the direction of movement of the film (50), a fastener (1) including a first strip (2) supporting at least one reclosable profile (10) engaged with another reclosable profile (12) that is complementary thereto and supported by a second strip (4) or a part of the first strip (2), which will subsequently be attached to the film (50). Each strip (2, 4) includes at least one web (6, 8) extending substantially mostly sideways on one side of the profiles (12). The above arrangements make possible special fasteners (1) that include sliders (9), gasket membranes (26), fasteners inverted within the bag (30), peel seals (18, 20, 21) and hinged fasteners (1).

Abstract: The invention provides for a re-closable flexible package with gussets (2, 3, 4) on the sides and bottom for increasing its volume and providing ease of storage comprising: —a slider zipper assembly (5, 6) to open and close said package; —a diaphragm (7) of at least one metalized film placed below the slider zipper assembly to seal the package and act as barrier making it tamper proof; —a scoring line (45) on said diaphragm (7) for making it easier and more convenient for the user to tear open and access the contents of the package; —a handle (8) made of a laminate for ease in lifting or carrying the flexible package.

Abstract: A pouch including opposing sidewalls sealed together in a closed distal portion to form an interior that is accessible by a proximal opening. A closure profile extends along an interior surface of the opposing sidewalls for selectively sealing the proximal opening, wherein the closure profile substantially extends a length of the proximal opening. A plurality of tactile strips are disposed on an interior surface of at least one of the opposing sidewalls between the closure profile and the proximal opening, the tactile strips being variably spaced. Preferably, each tactile strip has a well-formed triangular cross-sectional shape with a height from the respective sidewall approximately double a thickness of the respective sidewall.

Abstract: The invention relates to a packaging with a packaging closure and a method for producing such a packaging. To provide a particularly easy to-use packaging, the packaging according to the invention comprises: a first side panel and a second side panel, said first and second side panel forming an opening of an interior of the packaging for receiving a product, and wherein the first side panel comprises a flap, and a coupling element, wherein the flap comprises a pulling area and a separation area, wherein said separation area is configured to be located in the opening, wherein the pulling area is configured to pull the separation area from the opening, and wherein the coupling element is configured to couple the separation area to the first and/or second side panel and to close the opening.

Abstract: A polymer bag including a layer of a woven polymer and a method of sealing the gusseted bag by utilizing plasma treatment for sealing at least a pinch bottom of the bag, and additionally, profile strips for reclosably opening and closing the top of the bag.

Abstract: A package having a recloseable pour spout is disclosed, with the package including front and rear package panels which may be joined at respective side edges thereof by inwardly extending side gussets. An upper edge portion of the package is removable, including one of the side gussets, to form a pour spout for dispensing the contents of the package. A fastener strip, which can be detachably connected to itself, extends between confronting inside surfaces of the front and rear package panels, adjacent to the pour spout, whereby the pour spout can be conveniently closed after the package is initially opened. A method of forming the present package is also disclosed.

Abstract: A stand-up pour bag has front and back panels made of a thermoplastic film and having joined longitudinal edges and upper and lower transverse edges bridging the transverse edges. An inwardly folded lower end panel made of thermoplastic film extends between and is joined to the lower edges of the front and back panels, and an inwardly folded upper end panel made of thermoplastic film extends between and is secured at joints to the upper edges of the front and back panels. A closable pourer is bonded to the upper end panel and the upper edge of the front panel at the joint between the upper end panel and the upper edge of the front panel. A carry handle made of a thermoplastic film is bonded to the back panel generally centrally and inward of the edges thereof.

Abstract: An air packaging device includes two layers of thermoplastic films, which form a sealable space where air is filled after first and second steps of heat-sealing process. The sealable space includes a number of independent sealed air chambers and a main air passage channel. The main channel has an air inlet. Each sealed air chamber is connected with the main channel by at least one one-way valve each including at least two layers of plastic films. At least two one-way valves are installed inside of the air chambers. This air packaging device increases the cushioning protection where the protection is most needed, but can reduce air chamber dimension at less important locations in order to reduce the volumetric size and, hence, reduce the shipping cost.

Abstract: An air packaging device includes two layers of thermoplastic films, which form a sealable space where air is filled after first and second steps of heat-sealing process. The sealable space includes a number of independent sealed air chambers and a main air passage channel. The main channel has an air inlet. Each sealed air chamber is connected with the main channel by at least one one-way valve each including at least two layers of plastic films. At least two one-way valves are installed inside of the air chambers. This air packaging device increases the cushioning protection where the protection is most needed, but can reduce air chamber dimension at less important locations in order to reduce the volumetric size and, hence, reduce the shipping cost.

Abstract: A tamper evident package has a first wall and a second wall facing the first wall. A zipper is provided at a top of the package. The first and second walls include portions that extend over the zipper and the first wall extension portion has a line of weakness that extends parallel to the zipper. A peel seal joins the first wall and the second wall above the interlocking members of the profiles and sections of the first and second walls extend beyond the peel seal. If the zipper has a slider, a pocket is formed in one of the walls to accommodate the slider. The slider pocket extends parallel to the zipper. Methods of forming the package on various types of form, fill and seal equipment as well as the equipment are also disclosed.

Abstract: A UV-curable pressure sensitive adhesive, a package having an adhesive-based reclosable fastener including the pressure sensitive adhesive, and a method of forming the package is described herein. The package includes a cavity and opposing panels configured to cover an opening to the cavity. The reclosable fastener is a UV-cured pressure sensitive adhesive comprised of one or more UV-curable acrylic oligomers, one or more tack control components, and, optionally, an elastomeric material. An adhesive component ratio defines an effective ratio made up of the weight percent of the UV-curable acrylic oligomer relative to the sum of the weight percents of the tack control component and elastomeric component, where the ratio provides a fastener with a first peel adhesion and subsequent peel adhesions effective to form the adhesive-based fastener into a reclosable fastener.

Abstract: A machine for forming a flexible pouch having a spout fitment includes a frame, a transport device adjacent the frame for transporting a flexible material therealong, and a feeder device for supplying a roll of tape material having a plurality of fitments secured thereto. A fitment insertion station receives the roll of tape material with pre-applied fitments, and removes the fitment, and seals the fitment to a fitment receiving portion of the flexible material. A pouch body forming station operatively forms a body of the pouch from the flexible material, and an upper edge, a lower edge and a side edge extending therebetween.

Abstract: The present disclosure relates to the use of first and second adhesives for the attachment of zipper flanges to reclosable packages. A first adhesive is typically a reactive, cross-linkable hot melt adhesive while the second adhesive is typically non-cross-linkable hot melt adhesive, typically, but not limited to, either EVA-based or polyamide-based. Alternatively, the second adhesive can be a coextrusion layer including a resin that is typically used as a sealant layer in zipper extrusion, such as metallocene type linear low density polyethylene.

Abstract: A device is provided for feeding horizontally oriented packages or bags at a regular interval to a zipper profile attaching device. The loose packages or bags are placed onto a servo-driven lugged chain conveyor wherein the lugs are evenly spaced at the nominal desired center-to-center spacing of the packages or bags. The servo-driven lugged chain conveyor feeds the packages or bags to be captured between upper and lower secondary constant velocity conveyors. The lower secondary constant velocity conveyor includes an encoder which is used to slave the servo of the servo-driven lugged chain conveyor, with an adjustable programmable ratio. This achieves a consistent center-to-center distance of the horizontally oriented packages or bags which are then fed to a zipper profile attaching device.

Abstract: An apparatus for positioning and attaching a plurality of fitments to a film includes a guiding device for guiding a plurality of fitments; an attaching device for attaching the fitments to the film; a means for advancing the attached fitments and film; and an indexing device for indexing the fitments, the indexing device including a spring housing, a spring, and a fastener, the indexing device being configured such that when a first fitment has been attached to the film and then advances past the indexing device, the spring controllably releases the first fitment, and a second fitment is advanced into attaching position. A process and vertical form/fill/seal apparatus are also disclosed.

Abstract: A container (10) having a valve flap (20) which is movable between a closed position, whereat it is seated on the seating area (18) to close an evacuation port (16), and an opened position, whereat it is unseated from the seating area (18) to open the evacuation port (16). A label structure (26) includes a film layer (28) forming a seat platform on which a seating area (18) is located and/or a film layer (30) forming a flap platform on which the valve flap (20) is located. A plurality of label structures (26) can be efficiently and economically mass-produced by a label-manufacturer and then supplied to the container-manufacturer for incorporation into the containers (10).

Abstract: Bag-on-container assemblies and bag-in-container assemblies are disclosed. The container may include a paperboard box having a front wall, a rear wall, a pair of opposed side walls, a plurality of flaps capable of forming a bottom wall and a plurality of flaps capable of forming a top wall. The inside surfaces of the box walls, including the outwardly facing strips, may have a thermal plastic coating thereon. The bag component of each type of assembly may include a closure member for to enable resealing of the bag component.

Abstract: A method and machine for applying a closure to a series of pouches includes a conveyor extending at least partially through the machine, first and second (optional) infeed modules, a culling module (optional), a replacement infeed module (optional) and a closure module (optional). The infeed modules feed pouches to the conveyor. The culling module includes a sensor that senses an undesired pouch in the series of pouches, and a rejection module that culls the undesired pouch in response thereto. The replacement infeed module feeds a replacement pouch into the gap left by the undesired pouch. The conveyor may be at least partially an intermittent conveyor. The infeed modules may be in a plane with the conveyor. The closure module may be a recloseable closure module, a zipper closure module or a slider closure module. The culling module may be part of each infeed module, and/or distributed over several locations.

Abstract: A machine is disclosed for securing a closure system onto a discrete pouch. The machine includes first, second and third stations. The first station is capable of advancing discrete pouches and lifting and folding a portion of a first major surface of each pouch upon itself to form a lip, and exposing an inner surface of a second major surface. The second station is capable of positioning and attaching a closure system transversely across the exposed inner surface. The closure system includes a track having first and second legs each having an outer surface. The first and second legs are joined together by an opening/closing mechanism which includes a movable member capable of being moved back and forth. The third station is located downstream from the second station and is capable of unfolding the lip and securing opposite ends of the lip to the outer surface of the second leg.

Abstract: The present invention relates to a process used for packaging a product in a web of material that has a zipper attached thereto. The process includes providing a web of material having first and second edges and a zipper including first and second interlocking members. The first and second interlocking members of the zipper are interlocked together. The first interlocking member of the zipper is attached to the web at an intermediate portion of the web between the first and second edges of the web. The second interlocking member has an attachment region that is facing away from the web. One edge of the web is folded away from the zipper and toward the other edge of the web. Unit operations are performed on the zipper to create zipper segments from the zipper while the zipper is exposed. Each of the zipper segments is associated with an individual food package made from the web.

Abstract: A bag and zipper assembly includes, side gussets of the bag are at inwardly folded positions between first and second panels. Each side gusset of the bag has a set of one or more gusset openings adjacent an open end of the bag. The first panel has a corresponding set of one or more panel openings, and adhesive extends in each of the openings for the adhesive to adhere the side gussets to the first panel and restrain each side gusset from movement outwardly from between the first and second panels.

Abstract: A series of pre-opened resealable bags formed as a continuous web and received on a roll suitable for implementation in an automatic bagging machine are presented. The web of bags consist of top and bottom films thermally bonded together along the edges thereof. Transverse resealable zipper strips are interposed between the top and bottom films, with mating portions thereof respectively bonded to an associated films. A top film is provided with a filling slit, adapted for receiving product or materials therethrough. Appropriate seals and perforations are provided transverse to the web to allow the bags to be separated from each other and to allow for operator access to the resealable zipper strip. In another embodiment, the zipper strips are substituted or supplemented with plastic reinforcing strips to accommodate a punched hold for hanging display of the bag. A process for manufacturing such bags from a pair of webs received inserted zipper strips is also presented.

Abstract: A belt-shaped base of a male member of a zipper tape attached on an inner surface of a bag body includes a main body provided with an engagement portion, a thin portion connected to an opening-side of the main body, a thick portion connected to an opening-side of the thin portion and a projecting portion provided on the thick portion. A female member is also provided with the same arrangement. When the zipper tape is fused with the bag body, a gap is provided between the thin portion and a film of the bag body and between the thin portion and a film of the bag body, so that the thin portions are easily bent.

Abstract: A flexible container and a method of manufacturing the same where a spout or fitment is attached to the outside of the flexible container. The flexible container includes a patch having at least a portion of the patch overlapping an opening of the flexible container. The fitment is attached to the outside of the sidewall of the container and the portion of the patch which overlaps the opening of the flexible container. The fitment includes a flange with a bottom surface having sealing beads. The sealing beads can be bonded to the outside of the sidewall of the container and/or the portion of the patch which overlaps the opening of the flexible container.

Abstract: A tamper indicating, resealable closure for a package includes first and second film layers releasably adhesively joined together such that the first and second film layers are at least partially separable when the second film layer is pulled away from the first film layer. The first film layer includes first and second tear lines formed thereon to define first and second panel sections respectively. The first panel section defines an access opening through the first film layer when it is separated along the first tear line during an initial separation of the first and second film layers. The second panel section also becomes separated from the first film layer when the second film layer is separated from the first film layer to provide an indication of an initial opening of the closure. Subsequently, the second film layer may be re-adhered to the first film layer to reseal the access opening, while the second panel section remains separated from the first film layer.

Abstract: Reclosable bags, plastic film for making the bags, and a method and apparatus for making the bags are disclosed. The bag has a reclosable fastener (26) connected to a single wall of the bag, and the film (55) has a reclosable fastener (26) connected to one side thereof which does not require attachment to any other portion of the film (55) when making a bag. The fastener (26) has a tamper-proof member attached thereto to indicate if the bag has been previously opened. The film (55) can be wound into a roll (54) suitable for use on conventional bag making machines including form, fill, and seal machines or a chain of coilable reclosable bags can be produced therefrom since the fasteners (26) are connected to the web preferably transversely to the bags longitudinal formation axis.

Abstract: A method is provided for producing a bag with a mouth member by liquidtightly melt-bonding a mouth member comprising a thermoplastic resin and a bag unit comprising a relatively soft flexible film, in which uniform surface temperature of the mouth member is realized, generation of an A-shaped gap is prevented, and a bag with a mouth member excellent in the liquidtightness of the melt-bonded part between the mouth member and the bag unit is produced; and also a production apparatus therefor is provided. The method comprises a preheating step of heating a tubular mouth member while rotating it around the cylinder axis thereof, and a melt-bonding step of inserting the heated mouth member into the opening part of a bag unit and pressing, and thereby melt-bonding the mouth member to the opening part of the bag unit.

Abstract: A reclosable fastener (10) comprising a two-part body and a single flange (16) is located between two webs (34) of material from which a bag is to be made on a form-fill-seal machine. The fastener is attached initially to the inside of one web (34) by the flange (16). The combination passes between sealing jaws (44) to seal the webs to the fastener at thickened zones (30) at the margins of the body By making the body compact, and by using sealing jaws (44) which are longer than the body, the webs (34) form around the ends of the fastener body.

Abstract: The invention concerns a method to manufacture fastening assemblies (1) for bags, characterized in that, for each assembly (1), it comprises the steps of supplying interlocking profiles (11) provided with flanges (12) for attachment to a bag; mounting an actuating slider (13) on the profiles (11); forming two end stops (2) for the slider (13) in the profiles (11); forming two lumens (3) in the attachment flanges (12); each lumen (3) having a longitudinal extension (E/2); forming two lines of weakness (4) between each lumen (3) and an upper part (111) of the profiles (11). The invention also concerns a corresponding bag-forming method, a corresponding strip of assemblies, and corresponding bag.

Abstract: A method of forming a flexible packaging laminate (30) that has a reclosable opening (20). The method includes forming a two-part laminate that has an outer structure (40) joined in face-to-face relation with an inner structure (60). Score lines (122,142) are formed in both structures (40,60) to enable an opening to be formed through the laminate by lifting an opening portion (e.g., a flap or the.like) of the two structures out of the plane of the laminate. The score line (122) through the outer structure defines a larger opening than the score line (142) through the inner structure, such that a marginal region of the outer structure extends beyond the edge of the opening portion of the inner structure. A pressure-sensitive adhesive (92) is used to re-adhere the marginal region to an underlying surface of the inner structure adjacent the opening through the laminate.

Abstract: A flexible packaging laminate is formed to have a built-in opening and reclose feature by forming the laminate as a two-part structure having an outer structure joined in face-to-face relation with an inner structure. Score lines are formed in both structures to enable an opening to be formed through the laminate by lifting an opening portion (e.g., a flap or the like) of the two structures out of the plane of the laminate. The score line through the outer structure defines a larger opening than the score line through the inner structure, such that a marginal region of the outer structure extends beyond the edge of the opening portion of the inner structure. A pressure-sensitive adhesive is used to re-adhere the marginal region to an underlying surface of the inner structure adjacent the opening through the laminate.

Abstract: The present invention relates to a device for applying runners (32) on closure profiles (22), comprising various actuator means (110, 120, 130, 140) driven by a common driving means (150), including a wheel (110) for driving a chain of runners (32) temporarily linked together by breakable bridges (34) in order to transfer successively each runner (32) towards an application station on the closure profiles (22); characterised in that the device includes means (170) for manually disengaging the driving wheel (110) relative to the other actuator members (120, 130, 140). The invention also relates to a method and a machine implementing the above-mentioned runner application device, and to the closure profiles and bags thus obtained.

Abstract: The present disclosure relates to a method for producing a high burst slider zipper which allows for bottom filling of reclosable packages, such as large bags, and further provides increased resistance to damage from the dropping or shock loading of the filled package. This is achieved by providing a peel seal or other frangible or separable connection between the zipper profiles, and by sealing a portion of one of the flanges to itself by a hard seal above the peel seal. This causes the external forces on a bag from bottom filling or shock loading to be directed toward the hard seal and further directed so as to cause a shear force against the peel seal, thereby increasing the resistance of the package to external forces.

Abstract: A vertical form, fill and seal machine in conjunction with a product supply apparatus provides a continuous, heat sealable plastic film and zipper tape and provides separate, product filled, reclosable, top opening sealed bags. The apparatus includes a means for supplying the continuous plastic film, a means for supplying zipper tape, a means for sealing the zipper tape sections to the film, a vertical fill tube assembly, a feeding means including a film drive roll upstream, film pull belts adjacent the vertical fill tube, a vertical sealing means for sealing the edges of the continuous film to the edges of the continuous zippered cap strip, a horizontal sealing, perforating, and severing means for severing the plastic tube between the first and second horizontal seals, and a tensioning means for horizontally elongating the flexible plastic tube transverse to its length prior to formation of the horizontal seals.

Abstract: The disclosure relates to a method and apparatus for the attachment of a zipper to a reclosable package or bag, particular packages or bags of relatively larger sizes. Pinch rollers separate the flanges of the zipper so that the interior walls of the flanges are pointing upward, then hot-melt adhesive is sprayed downwardly onto the flanges. The zipper is then guided over the edge of the horizontally-oriented package or bag by a tube with a longitudinal slot. The package or bag, with the zipper attached, is engaged between a driven-belt apparatus with a nip formed between opposed belts, thereby applying consistent and even pressure to the zipper flanges and assuring that the hot-melt adhesive forms a bond which is consistent, reliable and strong.

Abstract: Methods of manufacturing reclosable packages having a slider-operated string zipper covered by a tamper-evident shroud that is provided with at least one opening that at least partially exposes the slider. In accordance with one method, openings are formed in a web of packaging material that is folded, placed over the slider-operated string zipper, and attached to the receptacle walls to form a shroud. Preferably, the openings are sized, shaped and situated so that they frame the slider on both sides of the shroud. In accordance with another method, a reclosable package having a slider-operated string zipper and a shroud with openings that at least partially expose the slider can be formed using a single web of packaging material that is folded and sealed to form a shroud that covers the string zipper.

Abstract: The present disclosure relates to a method for producing a high burst slider zipper which allows for bottom filling of reclosable packages, such as large bags, and further provides increased resistance to damage from the dropping or shock loading of the filled package. This is achieved by providing a peel seal or other frangible or separable connection between the zipper profiles, and by sealing a portion of one of the flanges to itself by a hard seal above the peel seal. This causes the external forces on a bag from bottom filling or shock loading to be directed toward the hard seal and further directed so as to cause a shear force against the peel seal, thereby increasing the resistance of the package to external forces.