EP1447339B1 - Sachet avec temoin d'inviolabilité et fermeture à glissière - Google Patents

Sachet avec temoin d'inviolabilité et fermeture à glissière Download PDF

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Publication number
EP1447339B1
EP1447339B1 EP04250716A EP04250716A EP1447339B1 EP 1447339 B1 EP1447339 B1 EP 1447339B1 EP 04250716 A EP04250716 A EP 04250716A EP 04250716 A EP04250716 A EP 04250716A EP 1447339 B1 EP1447339 B1 EP 1447339B1
Authority
EP
European Patent Office
Prior art keywords
zipper
slider
portions
tamper
bag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP04250716A
Other languages
German (de)
English (en)
Other versions
EP1447339A1 (fr
Inventor
Steven Ausnit
Basil C. Linton
Gregory H. Crunkleton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/367,450 external-priority patent/US6951421B2/en
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP1447339A1 publication Critical patent/EP1447339A1/fr
Application granted granted Critical
Publication of EP1447339B1 publication Critical patent/EP1447339B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8132—Applying the closure elements in the machine direction

Definitions

  • reclosable bags comprise a receptacle having a mouth with a slider-actuated zipper installed therein for opening and closing the bag. As the slider is moved in an opening direction, the slider causes the zipper sections it passes over to open. Conversely, as the slider is moved in a closing direction, the slider causes the zipper sections it passes over to close.
  • a zipper for a reclosable bag includes a pair of interlockable profiled closure strips that are joined at opposite ends of the bag mouth.
  • the profiles of interlockable plastic zipper parts can take on various configurations. e.g. interlocking rib and groove elements having so-called male and female profiles, interlocking alternating hook-shaped closure elements, etc. Reclosable bags having slider-operated zippers are generally more desirable to consumers than bags having zippers without sliders because the slider eliminates the need for the consumer to align the interlockable zipper profiles before causing those profiles to engage.
  • FIG. 1-17 do not form part of the present invention.
  • FIG. 13 is a drawing showing an alternative construction of a tamper-evident slider-actuated string zipper package.
  • the receptacle 2 may be made from any suitable film material, including thermoplastic film materials such as low-density polyethylene, substantially linear copolymers of ethylene and a C3-C8 alpha-olefin, polypropylene, polyvinylidene chloride, mixtures of two or more of these polymers, or mixtures of one of these polymers with another thermoplastic polymer.
  • thermoplastic film materials such as low-density polyethylene, substantially linear copolymers of ethylene and a C3-C8 alpha-olefin, polypropylene, polyvinylidene chloride, mixtures of two or more of these polymers, or mixtures of one of these polymers with another thermoplastic polymer.
  • the receptacle 2 comprises opposing walls (only the front panel is visible in FIG. 1 ) that may be secured together at opposite side edges of the bag by seams 60 and 62 (indicated by dashed lines). The opposing bottoms of the walls may be joined, for example, by means of a
  • the receptacle 2 has an openable mouth, on the inside of which is an extruded plastic string zipper 4.
  • the string zipper 4 comprises a pair of interlockable zipper strips 6 and 8 (best seen in FIG. 2 ).
  • FIG. 2 shows a rib and groove arrangement
  • the profiles of the zipper halves may take any form,
  • the string zipper may comprise interlocking rib and groove elements (as shown in FIG. 2 ) or alternating hook-shaped closure elements.
  • the preferred zipper material is polyethylene or polypropylene.
  • the string zipper 4 is operated by sliding the slider 10 along the zipper strips. As the slider moves across the zipper, the zipper is opened or closed. As shown in FIG. 1 , the slider is slidable along the zipper in a closing direction "C", causing the zipper strips to become engaged, or in an opening direction "0" , causing the zipper strips to become disengaged.
  • the string zipper 4 further comprises end stops 66 and 68 for preventing the slider 10 from sliding off the end of the zipper when the slider reaches the zipper closed or fully opened position.
  • the end stops are formed by fusing the ends of the zipper strips together while at the same time shaping the fused material into an end stop structure.
  • Such end stops perform dual functions, serving as stops to prevent the slider from going off the end of the zipper and also holding the two zipper profiles together to prevent the bag from opening in response to stresses applied to the profiles through normal use of the bag.
  • the present invention is not limited to the incorporation of a slider end stop structure of any particular type.
  • a tamper-evident seal (or feature) is formed in the interior of the bag on the product side of the string zipper.
  • the tamper-evident seal takes the form of a U-shaped or V-shaped membrane of bag making film that is suspended from the zipper on the product side thereof.
  • the dashed line 44 demarcates the cusp of such a U- or V-shaped membrane.
  • One side of the membrane is joined to the back of one zipper strip, while the other side of the membrane is joined to the back of the other zipper strip The ends of the membrane 44 are captured in the side seals 60 and 62, thereby hermetically sealing the interior volume of the bag.
  • the membrane 44 comprises a first layer of film material that has been folded into a U- or V-shape and that has respective marginal portions joined (e.g., by conduction heat sealing) to the backs of a pair of interlocked flangeless zipper strips 6 and 8.
  • a third layer of the same film material having a marginal portion merged with the other marginal portion of the first layer, forms a rear wall 2b of the receptacle 2.
  • the string zipper comprises a pair of interlockable zipper parts or strips 6 and 8.
  • FIG 2 shows a rib and groove arrangement
  • the profiles of the zipper strips may take any form.
  • the string zipper may comprise interlocking rib and groove elements (as shown in FIG. 2 ) or alternating hook-shaped closure elements.
  • the preferred zipper material is polyethylene or polypropylene.
  • the merged marginal portions of the membrane 44 and the receptacle walls 2a and 2b may be respectively sealed to the backs of the zipper strips 6 and 8 by a conventional conduction heat sealing technique.
  • FIG. 3 shows a stage in the manufacture of the bag partially depicted in FIG. 2 .
  • one starts with a single web of film material that is folded three times to form an M-shaped gusseted end.
  • the string zipper is inserted into the gusset (at a distance from the cusp of the gusset) and then the film is heat sealed to the string zipper on both sides to form merged double layers 3 and 3'.
  • a pair of hot sealing bars 80 and 82 is generally represented by rectangles spaced on opposing sides of the zipper. The sealing bars reciprocate between-retracted positions (seen in FIG. 3 ) and extended positions (not shown).
  • Heat sealing occurs when the extended sealing bars 80 and 82 press the double layers of film material against the respective backs of flangeless zipper strips 6 and 8.
  • the sealing bars form band-shaped zones of joinder.
  • the folded edges 72 and 74 may extend above the zipper on respective sides thereof, These folded loops will later be trimmed by cutting along cut lines 76 and 78.
  • the upper margins of the double layers of bag film may have short free ends (below the cut lines 76 and 78 depicted in FIG 3 ) that extend above the zones of joinder, provided that these free ends are not so long as to interfere with travel of the slider along the zipper or become entangled with the zipper profiles.
  • the folds 72 and 74 may be sufficiently aligned with the zipper strips 6, 8 that no trimming is necessary.
  • the zipper in this example is an extruded plastic structure comprising mutually interlockable profiled flangeless zipper strips 6 and 8.
  • Zipper strip 8 comprises a base and two generally arrow-shaped rib-like male closure elements or members 20 and 28 projecting from a base 14, while zipper strip 6 comprises two pairs of hook-shaped gripper jaws connected by a sealing bridge 12.
  • the pairs of gripper jaws form respective complementary female profiles for receiving the male profiles of closure elements 20 and 28. More specifically, jaws 16 and 18 receive and interlock with the male element 20, while jaws 22 and 24 receive and interlock with the male element 28.
  • the sealing bridge 12 and the base 14 are resiliently flexible self-supporting structures having a thickness greater than the thickness of the bag film.
  • the male closure elements are integrally formed with the base 14, while the female closure elements are integrally formed with the sealing bridge 12.
  • the end face of upper edge 30 of the base 14 that carries the male closure elements 20 and 28 is inclined at about a 45° angle to facilitate loading of the slider onto the zipper from above without snagging on a corner of the upper edge.
  • the bottom edge of the base 14 cooperates with a retaining ledge on the slider to increase the slider pull-off resistance.
  • a rib 26 is formed on zipper part 6, the rib 26 cooperating with a retaining ledge on the other side of the slider.
  • FIGS. 2 and 3 show a rib-and-groove arrangement
  • the profiles of the zipper strips may take any form.
  • either string zipper may comprise alternating hook-shaped closure elements.
  • the plow 42 depends downward from a central portion of the top wall 32 to an elevation below the lowermost portions of each side wall, and has rounded edges and flattened corners at the tip to facilitate insertion of the plow between the zipper profiles without snagging during automated slider insertion.
  • the plow 42 pries the impinging sections of zipper strips 6 and 8 apart.
  • the narrowing section of the slider tunnel is formed by a pair of substantially planar, inclined interior surfaces (not visible in FIG. 2 ), which converge toward the closing window of the slider. The inclined surfaces funnel or squeeze the zipper strips toward each other, causing the zipper profiles to interlock, as the slider is moved in the closing direction.
  • the slider 10 further comprises a retaining projection or ledge 38 that projects inward from the side wall 34 and a retaining projection or ledge 40 that projects inward from the side wall 36.
  • the ledges 38 and 40 project toward each other, forming respective latches for latching the slider onto the zipper.
  • the ledges 38 and 40 further comprise respective generally planar, inclined bottom surfaces 50 and 52 that serve to guide the respective zipper strips 6 and 8 into the slider tunnel during automated slider insertion.
  • reclosable bags with tamper-evident features and slider-actuated string zippers disclosed herein do not require that the slider have a separating finger. Sliders without separating fingers can also be employed, provided that the zipper strips are suitably designed to be actuated by such sliders.
  • Reclosable packages of the type partially depicted in FIG. 2 can be manufactured on an automatic production line.
  • the steps of the method of manufacture carried out by such equipment comprise the following steps: First, a web of bag making film is folded along three fold lines to form a generally M-shaped gusseted end comprising first through fourth layers of film material. A string zipper is then inserted at an angle into the space between the two central (i.e. second and third) layers of the gusset. At a zipper sealing station, a section of zipper is sealed to both sides of the gusset, i.e..
  • a line of weakened tear resistance e.g., a line of spaced perforations
  • the tear line being located such that it is at or near the cusp of the gusset after folding.
  • FIGS. 4-8 An alternative method for manufacturing a reclosable bag having a slider-actuated string zipper and a tamper-evident seal on the product side of the zipper is depicted in FIGS. 4-8 .
  • a web 90 of bag making film is folded along three fold lines to form a generally M-shaped gusseted end comprising first through fourth layers of film material, as shown in FIG. 4 .
  • the other end of the web is left open.
  • a line of weakened tear resistance may be formed in the web along a centerline before folding. As a result of the folding operation, this line 45 of weakened tear resistance will be located at the cusp of the gusset.
  • the line of weakened tear resistance may take the form of a scoreline. If a hermetic seal is not required, then a line of spaced perforations could be used.
  • a separator plate 84 is inserted into the gusset in the area where the string zipper will be joined, as shown in FIG. 5 .
  • a pair of heated sealing bars 80 and 82 shown in respective retracted positions in FIG. 5 , are then extended until the faces of the sealing bars respectively press the respective layers of folded film against the separator plate 84 from opposite sides thereof.
  • the marginal portions of the first and second film layers of the folded web are heat sealed together on one side of the separator plate 84, while the marginal portions of the third and fourth film layers of the folded web are heat sealed together on the other side of the separator plate 84.
  • the separator plate 84 prevents The sealing together of the second and third film layers that form the gusset,
  • one fold is lifted up, or more exactly, pivoted from a generally horizontal position to a generally vertical position, as shown in FIG 6 , by a deflector 86.
  • the string zipper 4 is introduced, e.g., by laying string zipper on top of the sealed portion of the fold that was not lifted up, the zipper being disposed proximal and parallel to the edge of the fold.
  • the uplifted fold is then returned to its original position (this step is not shown in the drawings), in which case the zipper 4 will now be sandwiched between the respective sealed portions of the respective fold on opposite sides of the gusset.
  • another pair of heated sealing bars 94 and 96 shown in their respective retracted positions in FIG.
  • a slider 10 (see FIG. 8 ) is inserted over the zipper and respective joined film layers. If due to the difficulty of precisely aligning the string zipper with the edges of the merged double layers of film, portions of the merged film extend beyond the zones of joinder of film to zipper, those portions can be trimmed to prevent interference with the operation of the slider-zipper assembly.
  • FIGS. 9 through 11 show successive steps of a method of dual manufacture of tamper-evident slider-actuated string zipper packages loaded with product.
  • the film is folded to form respective M-shaped gusseted ends at diametrically opposite positions, the folding operation at each end being similar to that described previously with reference to FIG. 4 .
  • the marginal portions of the outer folds of each gusseted end are then sealed together using separator plates and heated sealing bars in the manner generally described previously with reference to FIG. 5 .
  • a respective sealed fold at each gusseted end is pivoted to a respective upright position and a respective string zipper is introduced onto the sealed folds that were not uplifted, in the manner previously described with reference to FIG. 6 .
  • the uplifted folds of tubing 91 are then restored to respective horizontal positions overlying the respective string zippers, as shown in FIG. 9 .
  • Each string zipper 4 and 4' is then joined to the merged double layers of film that sandwich the zipper. More precisely, the heated sealing bar 94 joins the sealed fold 98 to the back of one flangeless zipper strip of zipper 4; the heated sealing bar 96 joins the sealed fold 100 to the back of the other flangeless zipper strip of zipper 4; the heated sealing bar 94' joins the sealed fold 102 to the back of one flangeless zipper strip of zipper 4'; and the heated sealing bar 96' joins the sealed fold 104 to the back of the other flangeless zipper strip of zipper 4'.
  • the film tubing 91 is cut along a cutting line 106 that runs generally parallel to and equidistant from the zippers at opposite ends of the tubing. As explained below, this cutting operation allows product to be loaded.
  • FIG 9 depicts concurrent film cutting and zipper sealing operations, a person skilled in the art will recognize that the film could be cut after the zipper have been attached.
  • FIG. 10 depicts concurrent product loading and slider insertion operations, a person skilled in the art will recognize that the sliders could be inserted before or after the product is loaded, The product masses are placed between the zippers and separated from each other by a space where the film will be sealed by a heated sealing bar 116, as shown in FIG.
  • FIG. 12 shows another tamper-evident slider-actuated string zipper package, which does not form part of the present invention.
  • Two webs 125 and 126 of bag making film are folded inward to form two short flaps 122, 124 that are in mutual opposition.
  • the unfolded ends of the webs 125 and 126 are joined by a fin seal 127, which will serve as the bottom of the receptacle.
  • a peel seal 128 is joined to the opposing marginal portions of the flaps 122 and 124, forming a tamper-evident seal.
  • the film layers of the folds 130, 132 are sealed together and these merged double layers of film are in turn joined to the respective backs of the flangeless zipper strips of the string zipper 4.
  • a slider 10 is inserted on the string zipper with the merged layers of the outer folds being respectively disposed between the zipper strips and the side walls of the slider, in the manner depicted in FIG. 2 .
  • FIG. 13 shows an alternative construction of a tamper-evident slider-actuated string zipper package, which does not form part of the present invention.
  • This construction differs from the construction in FIG. 12 in that only web 125 of bag making film is folded inward to form a solitary inward flap 122.
  • the peel seal 128 joins the marginal portion of the flap 122 to a band-shaped zone on the opposing wall of the receptacle, thus forming a tamper-evident seal.
  • this embodiment differs from the embodiment of FIG.
  • one side of the string zipper 4 is joined to a single layer of film, i.e., the marginal portion 134 of the wall that is joined to the peel seal 128, while the other side of the string zipper is joined to a double layer of merged film material, as previously described.
  • the edges of the film that extend beyond the zone of zipper-film joinder can be trimmed as needed (which is true for all embodiments disclosed herein).
  • the marginal portion of the flap 122 can be hard sealed to the opposing receptacle wall with a line of weakened tear resistance being provided in the flap.
  • a single web of film could be folded a first time to form the bottom of the bag and a second time to form the folded double layer that is sealed to one zipper strip.
  • the end result would be a reclosable bag similar in structure to that shown in FIG. 13 , but without the fin seal 127 at the bag bottom.
  • the manufacture of this alternative embodiment would involve treating the back edge of the inward flap (on the other side of the peel seal) in a way that would prevent seal through during activation of the peel seal. In this cases the peel seal could activated after the slider has been loaded.
  • a web of film could be folded once to form a U-shape and then a separate strip of film could be sealed to the inside of one wall of the folded web to form the flap 122 seen in FIG. 13 .
  • the feeding of separate webs or strips of film and then joining them along a margin requires that the respective tensions in the separate webs or strips be separately controlled to be relatively equal.
  • separate webs 136, 138 of film of different width can each be folded into respective U-shapes, as shown in FIG. 14 .
  • the short folded web 136 is inserted between the sides of the long folded web 138 with their edges respectively aligned.
  • a string zipper 4 is inserted between marginal portions of the short folded web 136.
  • the marginal portions of the long and short folded webs are then heat sealed to the backs of the flangeless strips of the string zipper to form merged double layers 140, 142 of film of the type seen in FIG. 3 .
  • the fold 144 in the long folded web forms the bottom of the receptacle, while the fold 146 in the short folded web forms the cusp of a tamper-evident-seal.
  • the web of short width can be perforated or scored along a centerline to form a line of weakened tear resistance at or near the cusp of the tamper-evident seal.
  • the same structure depicted in FIG. 14 can be attained starting with a tube of film that is folded to form an M-shaped gusset. Then the double layers of film on opposing sides of the gusset are sealed to opposite sides of a string zipper in the manner previously described. If the gusset edges need to be trimmed, then the final structure would be identical to that shown in FIG. 14 . If the outer fold lines are sufficiently aligned with the zipper strips, then the folded edges would not need to be trimmed.
  • dual manufacture can be achieved by a method comprising the steps depicted in FIGS. 15 and 16 and other steps not depicted in the drawings.
  • a marginal portion of a second film web 146 is placed in overlying relationship with and then joined to the peel seal material 128 on one side of web 150, and a marginal portion of a second film web 148 is placed in overlying relationship with and then joined to the peel seal material 128 on the other side of web 150.
  • respective string zippers 4 are placed between respective marginal portions of web 150 and opposing respective folded-over portions of webs 146 and 148.
  • the film material on opposing sides of the string zippers 4 is sealed thereto by heated sealing bars (not shown), a respective double layer of film being joined on one side of each string zipper and a respective single layer of film being joined on the other side of each string zipper, as seen in FIG. 16 .
  • the free ends of the folded-over webs 146 and 148 are joined to a central portion of web 150, the resulting seal 152 being disposed along a centerline of web 150 that runs between the respective masses of product 114 and 114'.
  • sliders (not shown) are inserted. When the assembly depicted in FIG. 16 is cross sealed and cut along a transverse line and then cut along the centerline, bisecting the central seal 152, two finished filled packages come off of the production line.
  • FIG. 12 is susceptible to dual manufacture in a similar manner, except the web 150 is folded inward on both sides and then the lengths of peel seal material I 28 are applied to the inwardly folded flaps, as shown in FIG. 17 .
  • respective separating plates I 54 and 154' are inserted between the overlapping portions of web 150 during joinder of the peel seal material to the inwardly folded flaps by application of heat.
  • webs 146 and 148 are loaded with product, folded and sealed, string zippers are sealed in place, and sliders are inserted in the manner previously described with reference to FIGS. 15 and 16 .
  • FIGS. 18-22 A method for manufacturing an embodiment of the invention wherein the tamper-evident feature comprises a header is partially depicted in FIGS. 18-22 .
  • a web 156 of film material is folded along three fold lines to form a serpentine profile comprising a pair of inner legs 157 and 159, and a pair of outer legs 158 and 160.
  • the outer leg 158 is connected to the inner leg 157 at the first fold line; the inner leg 157 is connected to the inner leg 159 at the second fold line; and the inner leg 169 is connected to the outer leg 160 at the third fold line.
  • outer legs 158 and 160 are then folded over the zipper so that the marginal portions of the outer legs are in confronting relationship.
  • the confronting marginal portions of outer legs 158 and 160 are then heat sealed to form a fin seal 162 (see FIG. 22 ).
  • the resulting header can be open at both ends or, if a hermetic seal is desired, sealed shut at both ends. Thereafter, the assembly shown in FIG. 22 can be cross sealed and cut along a transverse line to sever a finished package from the work in progress.
  • Product can be placed on the web of film material 156 before the web is folded, or the space between the inner legs can be filled before the zipper is applied Alternatively, after zipper application and slider insertion, product can be loaded when the zipper is open, or the film can be slit to allow the product to be loaded, after which the slit is resealed.
  • a respective line of weakened tear resistance can be formed in each outer leg 158, 160, the lines being parallel to the zipper and below the slider, to facilitate removal of the header by a consumer.
  • Each line of weakened tear resistance may comprise a series of spaced perforations (for non-hermetic headers) or a scoreline (for hermetic headers).
  • the lines of weakened tear resistance can be formed in the web 156 before or after the header is formed. Additionally, the header could be provided with a hang hole.
  • the invention does not require that the slider have a plow or separating finger.
  • the slider-zipper assembly could be designed so that the side walls of a straddling slider cam or push the zipper open, without the aid of a plow or separating finger, when the slider is moved in an opening direction.
  • the verb "joined” means fused, bonded, sealed, adhered, etch, whether by application of heat and/or pressure, application of ultrasonic energy, application of a layer of adhesive material or bonding agent, interposition of an adhesive or bonding strip, etc.
  • string zipper means a zipper comprising two interlockable closure strips that have substantially no flange portions.

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Claims (9)

  1. Sac refermable comprenant :
    une tirette (4) comprenant un premier et un deuxième ruban de tirette (6, 8) sans bride, ledit premier ruban de tirette (6) comprenant une première base (12) et un premier profil de fermeture (22, 24) qui déborde de ladite première base (12) et ledit deuxième ruban de tirette (8) comprenant une deuxième base (14) et un deuxième profil de fermeture qui déborde (28) de ladite deuxième base (14) et qui engage ledit premier profil de fermeture (22, 24),
    une structure en film (156) comprenant :
    une première partie de fixation (3', 130) reliée à ladite première base (12) dudit premier ruban de tirette (6),
    une deuxième partie de fixation (3, 132) reliée à ladite deuxième base (14) dudit deuxième ruban de tirette (8),
    ladite tirette (4) étant disposée entre ladite et la première partie de fixation (3, 3') de ladite structure en film,
    une partie de réception (2, 2a, 2b) reliée d'un seul tenant à ladite première et à ladite deuxième partie de fixation (3', 130, 3, 132) et présentant un volume intérieur et
    une partie (162) de mise en évidence d'une tentative d'effraction présentant un côté (158) relié d'un seul tenant à ladite première partie de fixation (3', 130), ladite partie (162) de mise en évidence des tentatives d'effraction bloquant l'accès à la totalité ou à une partie dudit volume intérieur et
    une glissière (10) montée sur ladite tirette (4) et comprenant une première et une deuxième paroi latérale (36, 34) dont les surfaces intérieures sont situées face à des parties opposées respective de ladite première et de ladite deuxième partie de fixation (3', 130, 3, 132),
    caractérisé en ce que
    l'autre côté (160) de ladite partie (162) de mise en évidence des tentatives d'effraction est relié d'un seul tenant à ladite deuxième partie de fixation (3, 132) et
    en ce que ladite partie de mise en évidence des tentatives d'effraction forme un recouvrement (162) qui couvre ladite tirette (4).
  2. Sac selon la revendication 1, dans lequel ladite première et ladite deuxième partie de fixation (3', 130, 3, 132) ont toutes deux une épaisseur supérieure à l'épaisseur de ladite partie (162) de mise en évidence des tentatives d'effraction ou de ladite partie de réception (2).
  3. Sac selon la revendication 1 ou la revendication 2, dans lequel ladite partie (162) de mise en évidence des tentatives d'effraction comprend une première et une deuxième partie de recouvrement (158, 160) qui sont scellées thermiquement ensemble le long de parties de bord opposées pour former une étanchéité en ailette.
  4. Sac selon la revendication 3, dans lequel une ligne respective de moindre résistance à la déchirure est formée dans la première et la deuxième paroi de recouvrement (158, 160) dudit recouvrement (162), parallèlement à la tirette (4) et en dessous de la glissière (10).
  5. Sac selon la revendication 4, dans lequel ledit recouvrement (162) est doté d'un trou de suspension.
  6. Procédé de fabrication d'un sac refermable, le procédé comprenant les étapes suivantes :
    (a) agencer et sceller un matériau en film pour former un logement (2) qui présente une embouchure et un volume intérieur, un élément (162) de mise en évidence des tentatives d'effraction bloquant l'accès audit volume intérieur,
    (b) avant que ledit logement (2) soit doté de l'élément (162) de mise en évidence des tentatives d'effraction, rejoindre des parties opposées dudit matériau en film qui formeront ladite embouchure dudit logement sur les dos respectifs d'un premier et d'un deuxième ruban de tirette (6, 8) sans bride,
    (c) aligner l'un sur l'autre ledit premier et ledit deuxième ruban de tirette (6, 8) sans bride et
    (d) après les étapes (b) et (c), monter une glissière (10) sur ledit premier et ledit deuxième ruban de tirette (6, 8) sans bride alignés l'un sur l'autre, des parties respectives desdites parties opposées dudit matériau en film étant disposées entre des parois latérales respectives (36, 34) de ladite glissière (10) et les dos respectifs dudit premier et dudit deuxième ruban de tirette (6, 8) sans bride, caractérisé en ce que
    l'étape (a) comprend les étapes suivantes :
    replier une feuille (156) d'un matériau en film le long d'une première, d'une deuxième et d'une troisième ligne de pliage de manière à former un profil en serpentin qui comprend une première et une deuxième branche intérieure (157, 159) et une première et une deuxième branche extérieure (158, 160), ladite première branche extérieure (158) étant reliée à ladite première branche intérieure (157) sur ladite première ligne de pliage et ladite deuxième branche extérieure (160) étant reliée à ladite deuxième branche intérieure (159) sur ladite troisième ligne de pliage, des parties opposées de ladite première branche intérieure (157) et de ladite première branche extérieure (158) formant ladite partie opposées reliée audit premier ruban de tirette (6) des parties opposées de ladite deuxième branche intérieure (159) et de ladite deuxième branche extérieure (160) formant ladite partie opposée reliée audit deuxième ruban de tirette (8),
    relier les parties respectives de ladite première et de ladite deuxième branche intérieure (157, 159) de ladite feuille pour former ledit logement (2),
    replier ladite première branche extérieure (158) le long d'une quatrième ligne de pliage,
    replier ladite deuxième branche extérieure (160) le long d'une cinquième ligne de pliage et
    relier l'une à l'autre des parties opposées respectives de ladite première et de ladite deuxième branche extérieure repliée (158, 160) pour ainsi former un recouvrement (162) qui recouvre lesdits rubans de tirette (6, 8).
  7. Procédé selon la revendication 6, comprenant en outre l'étape qui consiste à former une ligne de moindre résistance au déchirement dans la première et la deuxième branche extérieure (158, 160) dudit recouvrement (162), parallèlement à la tirette (4) et en dessous de la glissière (10).
  8. Procédé selon la revendication 7, dans lequel l'étape de formation de la ligne de moindre résistance à la déchirure est réalisée après l'étape de jonction des parties opposées de la première et de la deuxième branche extérieure (158, 160) repliée qui forment ledit recouvrement (162).
  9. Procédé selon l'une quelconque des revendications 7 et 8, comprenant en outre l'étape qui consiste à former un trou de suspension dans ledit recouvrement (162).
EP04250716A 2003-02-14 2004-02-10 Sachet avec temoin d'inviolabilité et fermeture à glissière Expired - Fee Related EP1447339B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US617234 1996-03-18
US10/367,450 US6951421B2 (en) 2003-02-14 2003-02-14 Reclosable packaging having slider-operated string zipper
US367450 2003-02-14
US10/617,234 US7107738B2 (en) 2003-02-14 2003-07-10 Tamper-evident reclosable bag having slider-actuated string zipper

Publications (2)

Publication Number Publication Date
EP1447339A1 EP1447339A1 (fr) 2004-08-18
EP1447339B1 true EP1447339B1 (fr) 2011-11-30

Family

ID=32684741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04250716A Expired - Fee Related EP1447339B1 (fr) 2003-02-14 2004-02-10 Sachet avec temoin d'inviolabilité et fermeture à glissière

Country Status (5)

Country Link
EP (1) EP1447339B1 (fr)
JP (1) JP2004244112A (fr)
BR (1) BRPI0400551B1 (fr)
CA (1) CA2457654C (fr)
MX (1) MXPA04001436A (fr)

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WO2015114665A3 (fr) * 2014-01-30 2015-12-30 Ashok Chaturvedi Procédé de fabrication d'emballages possédant une fermeture à glissière refermable sur un premier panneau et emballage associé

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US7114309B2 (en) * 2003-01-10 2006-10-03 Illinois Tool Works Inc. Method and apparatus for making reclosable packages having slider-actuated string zippers
JP4881572B2 (ja) * 2005-04-11 2012-02-22 瀧川化学工業株式会社 スライダタイプのファスナ付き包装袋
GB2432568A (en) * 2005-11-28 2007-05-30 Avinash Alaspure Packet with zip closure
US20160311580A1 (en) * 2014-05-26 2016-10-27 Mupack Ozaki Co., Ltd. Packing bag
JP6124842B2 (ja) * 2014-06-02 2017-05-10 株式会社ミューパック・オザキ 包装袋
JP6333769B2 (ja) * 2015-04-27 2018-05-30 株式会社ミューパック・オザキ 包装袋
JP6447356B2 (ja) * 2015-05-15 2019-01-09 王子ホールディングス株式会社 包装袋および包装体
MA47034B1 (fr) * 2017-03-02 2021-11-30 Scheepers Gideonn Sacs de sécurité

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US6257763B1 (en) * 1997-04-08 2001-07-10 Huntsman Kcl Corporation Tamper evident zipper slider
FR2780037B1 (fr) 1998-06-17 2000-09-08 Flexico France Sarl Sachet comprenant des profiles de fermeture complementaires actionnes par curseur
US6220754B1 (en) 1998-09-09 2001-04-24 The Glad Products Company Closure device and slider
US6290391B1 (en) * 2000-01-18 2001-09-18 Reynolds Consumer Products, Inc. Reclosable package having slider device and tamper-evident structure
FR2820076B1 (fr) * 2001-01-26 2003-07-25 Flexico France Sarl Sachets a soufflets, procede et machine de fabrication a cet effet
US6951421B2 (en) 2003-02-14 2005-10-04 Illinois Tool Works Inc. Reclosable packaging having slider-operated string zipper
US6863645B2 (en) 2003-05-12 2005-03-08 Illinois Tool Works Inc. Method and apparatus for inserting sliders during automated manufacture of reclosable bags

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015114665A3 (fr) * 2014-01-30 2015-12-30 Ashok Chaturvedi Procédé de fabrication d'emballages possédant une fermeture à glissière refermable sur un premier panneau et emballage associé
GB2536842A (en) * 2014-01-30 2016-09-28 Chaturvedi Ashok Method of making packages having re-closable zipper on one panel and package thereof
GB2536842B (en) * 2014-01-30 2017-06-14 Chaturvedi Ashok Method of making packages having re-closable zipper on one panel and package thereof

Also Published As

Publication number Publication date
EP1447339A1 (fr) 2004-08-18
MXPA04001436A (es) 2005-06-17
JP2004244112A (ja) 2004-09-02
CA2457654A1 (fr) 2004-08-14
BRPI0400551B1 (pt) 2016-12-13
BRPI0400551A (pt) 2004-12-28
CA2457654C (fr) 2007-05-29

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