EP0746507B1 - Sealed envelope, particularly tubular bag, method for the manufacture thereof, and method for filling said envelope with a beverage - Google Patents

Sealed envelope, particularly tubular bag, method for the manufacture thereof, and method for filling said envelope with a beverage Download PDF

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Publication number
EP0746507B1
EP0746507B1 EP95909081A EP95909081A EP0746507B1 EP 0746507 B1 EP0746507 B1 EP 0746507B1 EP 95909081 A EP95909081 A EP 95909081A EP 95909081 A EP95909081 A EP 95909081A EP 0746507 B1 EP0746507 B1 EP 0746507B1
Authority
EP
European Patent Office
Prior art keywords
enclosure
sheet
edges
edge
sealed
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 - Lifetime
Application number
EP95909081A
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German (de)
French (fr)
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EP0746507A1 (en
Inventor
Alain Delsahut
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.)
Carapak Braintrust NV
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Carapak Braintrust NV
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 FR9402575A external-priority patent/FR2716865A1/en
Application filed by Carapak Braintrust NV filed Critical Carapak Braintrust NV
Publication of EP0746507A1 publication Critical patent/EP0746507A1/en
Application granted granted Critical
Publication of EP0746507B1 publication Critical patent/EP0746507B1/en
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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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/145—Valve bags, i.e. with valves for filling the filling port being provided in a flat upper sealing-edge
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/24—Inserts or accessories added or incorporated during filling of containers
    • B65D77/28—Cards, coupons, or drinking straws
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/03—Wrappers or envelopes with shock-absorbing properties, e.g. bubble films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles

Definitions

  • the present invention relates to a sealed enclosure fitted with a valve at least part of which extends to inside the enclosure and is formed between two sheets flexible joined in two non-converging lines to form between them a conduit by spacing of said sheets flexible from each other, allowing the passage of a fluid between the inside and the outside of the enclosure, these sheets being intended to be pressed against each other as soon as we stop applying force to them to keep them away, thus preventing said fluid from leaving the enclosure.
  • This invention also relates to a method for manufacturing this enclosure, as well as a method for conditioning a drink.
  • the object of the present invention is to remedy, at least in part, to the disadvantages of the above solutions.
  • the subject of this invention is an enclosure waterproof of the aforementioned type, as defined by the claim 1.
  • the advantage of the proposed solution is to allow the manufacture of the waterproof enclosure with valve integrated into a single wall of the enclosure which allows the use of production lines of existing type starting from film flat plastic.
  • the filling of this enclosure can be do at high flow, through a much larger section orifice larger than that of the valve.
  • the attached drawing illustrates, schematically and by way of example, different forms of execution and variants of the watertight enclosure, as well as their manufacturing methods, according to the present invention.
  • Figures 1 to 4 are perspective views illustrating the different stages in the construction of an enclosure according to a form of execution.
  • Figure 5 is a sectional view along line XV-XV of Figure 4.
  • Figures 6 to 12 are perspective views illustrating the different stages of manufacturing and filling of the first embodiment.
  • Figures 13 to 17 are perspective views illustrating the different stages of manufacturing and filling of the second embodiment.
  • Figures 18 and 19 are perspective views of two variants of figure 12.
  • Figures 20 to 20f are partial views of a alternative embodiment of the embodiments of Figures 1 and 2 or 7 and 9.
  • Figures 21a to 21d are partial views of a another alternative embodiment.
  • Figure 22 is a sectional view of another variant again.
  • Figure 23 is a perspective view of another variant of the embodiment illustrated in FIG. 18.
  • Figure 24 is a plan view of a variant of the valve applicable to any of the forms of execution linked to a liquid packaging enclosure.
  • Figure 25 is a perspective view of a method of manufacture of a variant of the waterproof enclosure object of the invention.
  • Figure 26 is a sectional view along the line XXVI-XXVI of Figure 25 of this variant.
  • Figure 27 is a perspective view of another variant of the manufacturing process a variant of the waterproof enclosure.
  • Figure 28 is a sectional view along the line XXVIII-XXVIII in Figure 27.
  • Figure 29 is a perspective view of a final variant of the manufacturing process of another variant of the waterproof enclosure.
  • Figure 30 is a sectional view along the line XXX-XXX in Figure 29.
  • Figure 31 is a perspective view of a variant of Figures 4 and 5.
  • Figure 32 is a sectional view of a final variant of the waterproof enclosure.
  • we start from a sheet 24 that we fold a first time to form the strip 24a we preferably welds 28 and 29 'simultaneously as well as two parallel oblique welds 30 and 31 extending from one to the other weld 28 and 29 'to form the valve.
  • the sheet 24 is folded again in the vicinity of the weld 28 (in the direction of the arrow F - Figure 1) for form a strip 24b and the weld 29 'is fixed to the sheet 24 by a new weld 29 (Figure 2) thus connecting now between them three thicknesses of the sheet 24.
  • this new weld 29 stops between the oblique welds 30, 31 of the valve.
  • sheet 24 we then place sheet 25 (figure 3) and these sheets are welded together to form a pocket between them, on the one hand, and the welds 33, on the other hand, to receive an object to be wrapped.
  • the sheets 24 and 25 therefore form the internal walls of the waterproof enclosure. We still have two openings 34 including the role will be explained later.
  • the enclosure instead of providing a waterproof pocket between two double walls, could be walled simple, that is to say that it would contain only the leaves 24 and 26 and that the sheet 24 would not be pierced by the openings 34.
  • Such an enclosure could be used for packaging of a liquid, for example a drink.
  • the outer walls 26, 27 can be made made of materials different from those of the sheets 24, 25. This is how these external walls 26, 27 could be, for example, thicker ones. One could also imagine that these external walls are rigid or semi-rigid shells.
  • the walls of the enclosure are weldable, in particular by ultrasound, and are based on polyethylene (PE) or linear low density polyethylene (LLDPE), preferably made of PE / X / PE laminates, X being made up by an airtight barrier such as polyethylene vinyl alcohol (EVOH), polyamide (PA) or bioriented polyamide (OPA).
  • PE polyethylene
  • LLDPE linear low density polyethylene
  • EVOH polyethylene vinyl alcohol
  • PA polyamide
  • OPA bioriented polyamide
  • welding lines 28 and 29 connecting the welding line 29 ′ to the sheet 24 are not not essential. However, it has been found that they are useful, insofar as they ensure good positioning of the valve inside the enclosure during inflation. We have also found that it is preferable to connect the bottom of the pocket at the bottom of the enclosure. However, this measure is not essential either and sheets 24 and 25 could be interrupted at the welding line 33 delimiting the pocket bottom.
  • the rest of the perimeter of the enclosure may have another form than quadrangular. It is enough for that cut the leaves to the desired shape, before or after welding, the welding lines then following this form.
  • packaging according to Figures 1 to 5 could also be provided with a part extending outside of the enclosure beyond at least one of the welds 35 or 36, this part being able to be used to spare a handle by example, or to form a flap to protect access to the valve.
  • FIG. 6 represents a quadrangular sheet 40 in which we drilled an orifice 41 which we covered with a cover 42.
  • This sheet 40 is cut from a roll unrolled at flat on a horizontal or vertical production line in a hydrogen peroxide bath to guarantee aseptic packaging material.
  • the unfolding of the film or sheet runs parallel to the top and bottom welds of the bag.
  • the valve which we will first describe the manufacturing is carried out in stages in the direction of the course of the film reel.
  • Figure 7 shows this same sheet 40 which has been folded a marginal strip 40a on the front face of the sheet 40 at level of the center of orifice 41.
  • the marginal strip is welded 40a by two oblique parallel welds 43,44 delimiting this which will be the valve and by welds 45,46,47 parallel to the fold line of marginal strip 40a connecting each end of the welds 43,44 at the two lateral edges of the sheet 40.
  • Figure 8 shows the fold in the other direction (arrow F) than previously of marginal strip 40a with part 40b sheet 40 to which it was welded.
  • FIG 9 shows the welding 46a of the sheet 40 aux strips 40a and 40b along the same welding line as the welding 46.
  • the purpose of this welding 46a is to allow guiding of a straw between the oblique welding lines 43,44 delimiting the valve.
  • the bag has a quadrangular sheet 48 of the same dimensions that the sheet 40 provided with its valve and a bellows 49 intended to form the bottom of the bag making it possible to hold in vertical position on a horizontal surface.
  • this is made up of a laminate with an inner layer of thermoplastic, for example polyethylene and the outer layer of which is a thermosetting agent, for example OPA.
  • Figure 11 shows the two side welds 50,51 connecting sheets 40 and 48 to each other and the two bottom welds 52.53 connecting the bellows 49 respectively on sheets 48 and 40.
  • the upper edge of sheets 40 and 48 are not welded, leaving an opening 54 for filling the enclosure.
  • Figure 12 illustrates the finished packaging with the upper edges of the sheets 40,48 joined by a weld 55.
  • a straw 56 is engaged in the conduit formed between the welds 43 and 44 forming the valve and is also fixed on the external face of the sheet 40 by an adhesive tape 57.
  • Figures 13 to 17 relate to the manufacture of side bellows bags intended to be carried out on a production line including the machine axis is parallel to the vertical axis of the bag.
  • the position of the valve must be such that the folding operations are carried out continuously in the axis of the machine. This constraint involves positioning the valve on a part side of the bag.
  • Forming (figure 15) welds four in number, two welds 63 to fix the bellows 61,62 to sheet 40 and two solders 64 to stiffen the bag.
  • Figure 16 shows the welding of the bottom 65 while a opening 66 is left at the top of the bag to allow filling.
  • the bag closed by a seal 67 (figure 17) can be placed on the bottom weld 65 which will flatten under the weight of the liquid, while the channel formed between the welds 43 and 44 forming a valve allows access to the drink after perforation of the cover 42.
  • FIG. 18 shows the bag of Figure 12 in which the weld 46a has been removed and the valve channel formed between the welds 44 'and 50 (parallel to the edge of the bag and no longer obliquely) is more elongated so to form between the welds 44 ′, 45 ′ and 51 a pocket intended to receive the straw 56.
  • the packaging constituted by the sealed enclosure is specially designed to allow the drink to be consumed in several installments, it is useful to have a storage space for the straw 56, this being essential for entering the enclosure through the channel formed between the welds 44 'and 50.
  • the pocket containing the straw can be provided with a system of closure of the self-adhesive strip type along its upper edge in place of the weld 46a of FIG. 12 or of a closure known under the brand Mini-grip R.
  • a pocket 68 can be provided in one of the sheets 40 or 48 forming the wall of the enclosure, this pocket 68 serving as housing for the straw.
  • the waterproof enclosure described so far is made at from a sheet forming at least one wall of the enclosure and in a marginal strip from which we obtain by folding and welding, as described above, a valve allowing control the flow of a fluid in or out of the enclosure waterproof and keep this enclosure closed.
  • the weld 73 is cut between the parallel welds 74, 75 to form the channel and we spare two cutouts 74a, 75a in the middle of the width of the welds 74, 75.
  • These cutouts are intended to release part of the length of the valve of the marginal strip 71 in which it is formed, making it possible to increase the effectiveness of the pressure exerted on the external faces of the valve and used to close it as explained above. He is at note that these cutouts can advantageously also be practiced on the valves of the previous embodiments.
  • the marginal strip 71 in which the valve is folded over the rear face of the sheet 70 by compared to figure 20e, as shown in figure 20f after what the enclosure is finished as in the embodiments previous, by welding another sheet identical to the sheet 70, along the free edge of the marginal strip (figure 20f) and along the three sides of the sheet 70 no adjacent to this free edge thus closing the enclosure on four sides.
  • Figures 21a to 21d differs from the by the mere fact that the valve, made in a other material than sheet 70 ', intended to form a wall of the sealed enclosure, is formed as before by folding and welding before being fixed to the sheet 70 '.
  • Figure 18 proposes to achieve a pocket for accommodating a straw 56 therein, intended to consume the liquid contents of the enclosure.
  • Figure 23 illustrates a variant of this embodiment in which the enclosure single wall with valve is of the same type as in shape of execution of FIG. 11. However, this variant in differs from the fact that an external pocket is provided between a outer wall of the enclosure and a third wall 77 welded on three sides 78, 79, 80 at the corresponding edges of the enclosure, but stopping at a certain distance from the fourth side 81, thus allowing access to the interior of the pocket intended to receive a straw 82.
  • the opening of this pocket is closed by an adhesive strip 83 which extends from the edge 81 of the enclosure to below the edge upper non-welded sheet 77.
  • the sheet forming the wall of the enclosure adjacent to the pocket may be the sheet integral with the valve similar to valves of the embodiments described above. Being given that this wall is covered by the sheet 77 forming the pocket and by the self-adhesive strip 83, the sheet forming this wall and the valve can be made of a more material thinner than that of the other wall of the enclosure and the sheet 77.
  • the variant illustrated in Figure 24 shows a enclosure 90 provided with the valve formed between two parallel welds 86, 87 connecting two welds 88, 89 extending between two opposite edges of the enclosure 90.
  • the parallel welds 86, 87 are arranged so as to each form a thickening 86a, 87a in channel 91 of the valve, narrowing the funnel-shaped section of it to a point where the welds 86, 87 suddenly resume their initial thickness.
  • the large section of the funnel thus formed is turned towards the outside of the enclosure 90 and the smallest section is directed inward.
  • the length ratio between the entrance to channel 91 and the section the lower 91a of the funnel, on the one hand and this section the weakest 91a and the end of the channel 91 opening into enclosure 90, on the other hand, is about 2/3, 1/3.
  • the goal of this valve, the channel 91 of which is divided into two parts, the border is located at the level of the weakest section of the funnel 91a is, in the case of an enclosure of conditioning of a liquid, to allow to partially withdraw the straw above the level of section 91a in the leaving in the upper part of channel 91, the part bottom of channel 91 closing, even if the straw is engaged in the upper part of channel 91.
  • this form of valve can be used in the case of all previous embodiments of speakers intended for the packaging of liquids. Straw could moreover be replaced by a spout, especially in the packaging of liquid products other than drinks.
  • valve is made of a material other than the walls of the enclosure
  • a very thin film, uncut or precut in the fold of the film made of a material having elastomeric properties of sufficient elasticity not to deform in a non-elastic manner by the stress resulting from the introduction of the straw into the channel and capable of being perforated by the straw when it reaches the bottom of the undrilled channel.
  • a film can be produced in polyolefins such as terpolymers comprising ethylene, propylene and a long diene chain such as the Suite XTR R , Teclar R , Royalene R or Trefsin R.
  • All the described embodiments can be made from infinite lengths of material in sheet or film until waterproof enclosures are obtained which are then separated from each other.
  • the advantage of this manufacturing process is that both the valve formation than that of the enclosure, in pairs or four walls, are made by folding and / or welding longitudinal, as the material advances leaf. Therefore, the valve once made, if it is obtained in another sheet material than that of the enclosure itself, is integrated into the enclosure without being cut beforehand, avoiding having to position the valve, which is a complex operation, slowing down the pace and expensive in terms of investment.
  • Figure 25 illustrates a method of manufacturing a sealed enclosure that Figure 26 shows in section.
  • This process is therefore produced continuously from two films 92 and 93 that we unroll and on which we fold and welds as they advance.
  • the different process steps are illustrated by different perspective cuts of sheet materials. It is however clarified that these cuts are only there to show the various operations carried out but that the materials in sheets are only cut when the sealed enclosure is finished.
  • This film 92 is first of all folded longitudinally in two parts 92a, 92b of unequal widths. These two parts are welded by two longitudinal welds 94 with interruption between two parallel oblique welds 95 intended to spare the valve channel.
  • a cutout 96 is provided in the fold of the sheet 92 between the two oblique welds 95.
  • the second film 93 intended to form the sealed enclosure is rolled out in the next step, along the edge of part 92a of the valve formed in the film 92.
  • the separator guide 97 is arranged in the path of the film 92 and is intended for fit between the parts 92a, 92b. This separator 97 is intended to allow the welding of the edge of the part 92a with that of the film 93 without the part 92b being welded to them.
  • the film 93 is shaped to make the enclosure 98 illustrated in section in FIG. 26, with two side gussets 99.
  • the second edge longitudinal of the film 93 is welded to the longitudinal edge of the part 92b of film 92, these two longitudinal edges being previously bent at 90 °. So this waterproof enclosure has access to the entrance to the canal formed between the two oblique welds 95 located on a large face of the enclosure and no longer in an edge of it like so far.
  • the variant illustrated in Figures 27 and 28 is relates to a manufacturing process in which a enclosure filling unit with a liquid product intended to be conditioned in this enclosure.
  • a manufacturing process in which a enclosure filling unit with a liquid product intended to be conditioned in this enclosure.
  • the film 101 with the valve 102 is formed tubular around a filling hopper 103 and a longitudinal weld 104 ( Figure 28) is made between the edge of part 100b and the other edge of film 101, closing thus the tubular element formed around the hopper 103.
  • 105 transverse welds are made at intervals regular as the element advances tubular. Between two transverse welds 105, a dose of product to be packaged is poured through the hopper 103 and the pouches thus filled are separated from each other at middle of the width of the transverse welds 105.
  • Figures 29.30 illustrate yet another method of manufacture of waterproof packaging that differs from forms of execution described so far by the fact that we accesses channel 106 of valve 107 through an opening 108 cut from a film 109 intended to form a wall of the sachet waterproof.
  • Figure 29 instead of forming the valve by folding a sheet, we can get the same result by welding the adjacent longitudinal edges of two 110,111 bands of unequal widths. These two modes of valve design are interchangeable and depend on choice of manufacturer.
  • the free edge of the strip 110 is welded to the face internal film 109, with the help of a separator guide 112, then it is the edge of the strip 111 which is welded to the same inner side of film 109 with the help of another guide separator 113.
  • the two respective free edges of the strips 110 and 111 are welded on either side of the opening 108 thus allowing access to the channel 106 of the valve 107.
  • a film 114 is unwound and welded at the two edges film 109.
  • Figure 31 is a variant of the illustrated waterproof bag in FIG. 5.
  • the film 24 forming the valve 24a, 24b is provided with a cut-out opening 115 blocked by a tongue 116 partially welded or glued to the film 24 to close the opening 115 hermetically. By grabbing the non-welded part of the tongue 116, it can be torn off to deflate the bag.
  • This bag also has a flap 117 welded to the edge 36 and formed by a pocket intended to receive a plug mailing. This flap 117 normally covers the tongue 116 sticks to sheet 26 and thus avoids accidental tearing of this tab.
  • Figure 32 shows a final variant of the sealed enclosure in which the enclosure is formed of two films 118, 119, the film 118 being folded back to form one of the parts 118a of the valve, the other part of which is formed by a film 120 welded like all the previous valves to the part 118a. Finally, the free edge of the film 120 is welded to the adjacent edge of film 119.
  • the valve can be integrated into a wall of the sealed enclosure as in the case of FIGS. 1 to 19, that the valve can be produced in a film separate from that of the waterproof enclosure as in the case of figure 20, that the valve can be made with two films (figure 29) and finally that it can be produced by a film welded to a film folded over wall of the bag. In all cases the valve is obtained by continuous with the sealed enclosure and therefore passes through the bag between two opposite edges of this sealed enclosure.

Description

La présente invention se rapporte à une enceinte étanche munie d'une valve dont une partie au moins s'étend à l'intérieur de l'enceinte et est formée entre deux feuilles souples réunies selon deux lignes non convergentes pour former entre elles un conduit par écartement desdites feuilles souples l'une de l'autre, permettant le passage d'un fluide entre l'intérieur et l'extérieur de l'enceinte, ces feuilles étant destinées à être plaquées l'une contre l'autre dès que l'on cesse de leur appliquer une force pour les écarter, empêchant ainsi ledit fluide de sortir de l'enceinte. Cette invention se rapporte aussi à un procédé de fabrication de cette enceinte, ainsi qu'à un procédé pour conditionner une boisson.The present invention relates to a sealed enclosure fitted with a valve at least part of which extends to inside the enclosure and is formed between two sheets flexible joined in two non-converging lines to form between them a conduit by spacing of said sheets flexible from each other, allowing the passage of a fluid between the inside and the outside of the enclosure, these sheets being intended to be pressed against each other as soon as we stop applying force to them to keep them away, thus preventing said fluid from leaving the enclosure. This invention also relates to a method for manufacturing this enclosure, as well as a method for conditioning a drink.

On a déjà proposé de telles enceintes étanches munies d'une valve réalisée dans un prolongement de la paroi de l'enceinte elle-même, évitant ainsi les problèmes liés à la fixation d'une valve rapportée. De telles enceintes sont décrites notamment dans le GB 826,784 ainsi que dans le FR 1 338 549. Le dernier de ces documents propose de réaliser cette enceinte à partir d'un élément tubulaire. L'inconvénient de cette solution est de nécessiter le retournement de l'élément tubulaire afin de placer la valve à l'intérieur de l'enceinte. Une telle solution ne se prête pas à la fabrication sur une chaíne de production automatique comprenant généralement des postes de pliage, soudage et découpage.We have already proposed such sealed enclosures provided a valve made in an extension of the wall of the enclosure itself, thereby avoiding problems related to the attachment of an attached valve. Such enclosures are described in particular in GB 826,784 as well as in FR 1 338 549. The last of these documents proposes to carry out this enclosure from a tubular element. Disadvantage of this solution is to require the flipping of the tubular element in order to place the valve inside the enclosure. Such a solution does not lend itself to manufacturing on an automatic production line including generally bending, welding and cutting stations.

Quant au GB 826,784 son principal inconvénient réside dans le fait qu'il ne permet le remplissage de l'enceinte au cas où celle-ci est appelée à servir au conditionnement d'une boisson, que par l'orifice de la valve dont la section est forcément très petite puisqu'elle est prévue, par définition, pour permettre le passage d'une paille. De ce fait, la vitesse de remplissage de l'enceinte se trouve forcément réduite par la section du passage, limitant la vitesse de la chaíne de production. Une telle solution n'est évidemment économiquement pas rentable. As for GB 826,784 its main drawback is in the fact that it does not allow the filling of the enclosure at when it is used to condition a drink, only through the valve orifice, the cross section of which is necessarily very small since it is provided, by definition, to allow the passage of a straw. Therefore, the speed filling the enclosure is necessarily reduced by the section of the passage, limiting the speed of the chain production. Such a solution is obviously not economically not profitable.

Un autre inconvénient est que cette solution n'est pas adaptée à être produite sur des types de machines connus, disponibles ou adaptables à la fabrication de l'enceinte.Another disadvantage is that this solution is not adapted to be produced on known types of machines, available or adaptable to the manufacture of the enclosure.

Le but de la présente invention est de remédier, au moins en partie, aux inconvénients des solutions susmentionnées.The object of the present invention is to remedy, at least in part, to the disadvantages of the above solutions.

A cet effet, cette invention a pour objet une enceinte étanche du type susmentionné, telle que définie par la revendication 1.To this end, the subject of this invention is an enclosure waterproof of the aforementioned type, as defined by the claim 1.

Elle a encore pour objet un procédé pour conditionner une boisson dans cette enceinte étanche, telle que défini par la revendication 1 (voir revendication 21).It also relates to a process for conditioning a drink in this sealed enclosure, as defined by the claim 1 (see claim 21).

Elle a enfin pour objet un procédé de fabrication de l'enceinte étanche telle que défini par les revendications 1-20 (voir revendication 22).Finally, it relates to a process for manufacturing the sealed enclosure as defined by claims 1-20 (see claim 22).

L'intérêt de la solution proposée est de permettre la fabrication de l'enceinte étanche avec valve intégrée à une seule paroi de l'enceinte ce qui permet l'utilisation des chaínes de production de type existant en partant de film plastique plat. Lorsque l'enceinte est destinée au conditionnement de boissons, le remplissage de cette enceinte peut se faire à grand débit, par un orifice de section beaucoup plus grande que celle de la valve.The advantage of the proposed solution is to allow the manufacture of the waterproof enclosure with valve integrated into a single wall of the enclosure which allows the use of production lines of existing type starting from film flat plastic. When the enclosure is intended for packaging of drinks, the filling of this enclosure can be do at high flow, through a much larger section orifice larger than that of the valve.

Le dessin annexé illustre, schématiquement et à titre d'exemple, différentes formes d'exécution et variantes de l'enceinte étanche, ainsi que leur modes de fabrication, selon la présente invention.The attached drawing illustrates, schematically and by way of example, different forms of execution and variants of the watertight enclosure, as well as their manufacturing methods, according to the present invention.

Les figures 1 à 4 sont des vues en perspective illustrant les différentes étapes de la réalisation d'une enceinte selon une forme d'exécution.Figures 1 to 4 are perspective views illustrating the different stages in the construction of an enclosure according to a form of execution.

La figure 5 est une vue en coupe selon la ligne XV-XV de la figure 4.Figure 5 is a sectional view along line XV-XV of Figure 4.

Les figures 6 à 12 sont des vues en perspective illustrant les différentes étapes de fabrication et de remplissage de la première forme d'exécution.Figures 6 to 12 are perspective views illustrating the different stages of manufacturing and filling of the first embodiment.

Les figures 13 à 17 sont des vues en perspective illustrant les différentes étapes de fabrication et de remplissage de la seconde forme d'exécution.Figures 13 to 17 are perspective views illustrating the different stages of manufacturing and filling of the second embodiment.

Les figures 18 et 19 sont des vues en perspective de deux variantes de la figure 12. Figures 18 and 19 are perspective views of two variants of figure 12.

Les figures 20 à 20f sont des vues partielles d'une variante de réalisation des formes d'exécution des figures 1 et 2 ou 7 et 9.Figures 20 to 20f are partial views of a alternative embodiment of the embodiments of Figures 1 and 2 or 7 and 9.

Les figures 21a à 21d sont des vues partielles d'une autre variante de réalisation.Figures 21a to 21d are partial views of a another alternative embodiment.

La figure 22 est une vue en coupe d'une autre variante encore.Figure 22 is a sectional view of another variant again.

La figure 23 est une vue en perspective d'une autre variante de la forme d'exécution illustrée par la figure 18.Figure 23 is a perspective view of another variant of the embodiment illustrated in FIG. 18.

La figure 24 est une vue en plan d'une variante de la valve applicable à l'une quelconque des formes d'exécutions liées à une enceinte de conditionnement d'un liquide.Figure 24 is a plan view of a variant of the valve applicable to any of the forms of execution linked to a liquid packaging enclosure.

La figure 25 est une vue en perspective d'un procédé de fabrication d'une variante de l'enceinte étanche objet de l'invention.Figure 25 is a perspective view of a method of manufacture of a variant of the waterproof enclosure object of the invention.

La figure 26 est une vue en coupe selon la ligne XXVI-XXVI de la figure 25 de cette variante.Figure 26 is a sectional view along the line XXVI-XXVI of Figure 25 of this variant.

La figure 27 est une vue en perspective d'une autre variante du procédé de fabrication d'une variante de l'enceinte étanche.Figure 27 is a perspective view of another variant of the manufacturing process a variant of the waterproof enclosure.

La figure 28 est une vue en coupe selon la ligne XXVIII-XXVIII de la figure 27.Figure 28 is a sectional view along the line XXVIII-XXVIII in Figure 27.

La figure 29 est une vue en perspective d'une dernière variante du procédé de fabrication d'une autre variante de l'enceinte étanche.Figure 29 is a perspective view of a final variant of the manufacturing process of another variant of the waterproof enclosure.

La figure 30 est une vue en coupe selon la ligne XXX-XXX de la figure 29.Figure 30 is a sectional view along the line XXX-XXX in Figure 29.

La figure 31 est une vue en perspective d'une variante de des figures 4 et 5.Figure 31 is a perspective view of a variant of Figures 4 and 5.

La figure 32 est une vue en coupe d'une dernière variante de l'enceinte étanche.Figure 32 is a sectional view of a final variant of the waterproof enclosure.

Comme le montre la figure 1, on part d'une feuille 24 que l'on plie une première fois pour former la bande 24a, on effectue, de préférence simultanément, des soudures 28 et 29' ainsi que deux soudures obliques parallèles 30 et 31 s'étendant de l'une à l'autre soudure 28 et 29' pour former la valve. A cet effet, les soudures 28 et 29' s'arrêtent entre les soudures 30 et 31 et, ensuite, une découpe 32 est ménagée dans le premier pli entre ces soudures 30 et 31 pour former un passage traversant entre elles. La soudure 28 s'arrête à une certaine distance du bord libre de la bande 24a.As shown in Figure 1, we start from a sheet 24 that we fold a first time to form the strip 24a, we preferably welds 28 and 29 'simultaneously as well as two parallel oblique welds 30 and 31 extending from one to the other weld 28 and 29 'to form the valve. For this purpose, the welds 28 and 29 'stop between the welds 30 and 31 and then a cutout 32 is provided in the first fold between these welds 30 and 31 to form a crossing passage between them. The weld 28 stops at a certain distance from the free edge of the strip 24a.

On replie une nouvelle fois la feuille 24 au voisinage de la soudure 28 (dans le sens de la flèche F - figure 1) pour former une bande 24b et on fixe la soudure 29' à la feuille 24 par une nouvelle soudure 29 (figure 2) reliant donc maintenant entre elles trois épaisseurs de la feuille 24. Comme la soudure initiale 29', cette nouvelle soudure 29 s'arrête entre les soudures obliques 30, 31 de la valve.The sheet 24 is folded again in the vicinity of the weld 28 (in the direction of the arrow F - Figure 1) for form a strip 24b and the weld 29 'is fixed to the sheet 24 by a new weld 29 (Figure 2) thus connecting now between them three thicknesses of the sheet 24. Like the initial weld 29 ′, this new weld 29 stops between the oblique welds 30, 31 of the valve.

Sur la feuille 24, on place ensuite la feuille 25 (figure 3) et on soude ces feuilles ensemble pour former une poche entre elles, d'une part, et les soudures 33, d'autre part, pour recevoir un objet à emballer. De préférence, les bords latéraux de cette poche, fermés par les soudures 33, s'évasent pour faciliter le positionnement de l'objet dans la poche. Les feuilles 24 et 25 forment donc les parois internes de l'enceinte étanche. On ménage encore deux ouvertures 34 dont on expliquera le rôle par la suite.On sheet 24, we then place sheet 25 (figure 3) and these sheets are welded together to form a pocket between them, on the one hand, and the welds 33, on the other hand, to receive an object to be wrapped. Preferably, the edges side of this pocket, closed by the welds 33, flare to facilitate positioning of the object in the pocket. The sheets 24 and 25 therefore form the internal walls of the waterproof enclosure. We still have two openings 34 including the role will be explained later.

On place ensuite les deux feuilles 26, 27 respectivement, sur la feuille 24 et sur la feuille 25 (figure 4). On forme une soudure 35 entre un bord de la feuille 26 et le bord adjacent de la bande 24a. On forme un soudure 36 entre les deux bords adjacents des feuilles 25 et 27 et on forme une autre soudure 37 parallèle aux précédentes entre les bords adjacents des quatre feuilles 24, 25, 26 et 27 (figure 5). On forme enfin deux autres soudures parallèles, dont seule l'une, 38, est visible sur la figure 4, le long des deux autres bords des feuilles 24 à 27, terminant ainsi l'emballage. Etant donné que les quatre feuilles 24 à 27 sont soudées ensemble sur trois côtés et deux à deux sur le quatrième côté et que la valve débouche entre les feuilles 24 et 26, si les feuilles 24 et 25 n'étaient pas percées des ouvertures 34, seul l'espace entre les feuilles 24 et 26 pourrait être gonflé. Ces ouvertures 34 servent donc à mettre l'espace entre les feuilles 25 et 27 en communication avec la valve ménagée entre les bandes 24a, 24b de la feuille 24.Then place the two sheets 26, 27 respectively, on sheet 24 and on sheet 25 (Figure 4). Forming a weld 35 between an edge of the sheet 26 and the edge adjacent to the strip 24a. A weld 36 is formed between the two adjacent edges of sheets 25 and 27 and we form a another weld 37 parallel to the previous ones between the edges adjacent four sheets 24, 25, 26 and 27 (Figure 5). We finally forms two other parallel welds, of which only one, 38, is visible in Figure 4, along the other two edges sheets 24 to 27, thus ending the packaging. Given that the four sheets 24 to 27 are welded together on three sides and two to two on the fourth side and that the valve opens between sheets 24 and 26, if sheets 24 and 25 had no openings 34, only the space between sheets 24 and 26 could be inflated. These openings 34 therefore serve to put the space between the sheets 25 and 27 in communication with the valve formed between the strips 24a, 24b of sheet 24.

Dans une variante, l'enceinte, au lieu de ménager une poche étanche entre deux doubles parois, pourrait être à paroi simple, c'est-à-dire qu'elle ne comporterait que les feuilles 24 et 26 et que la feuille 24 ne serait pas percée par les ouvertures 34. Une telle enceinte pourrait servir à l'emballage d'un liquide, par exemple une boisson.Alternatively, the enclosure, instead of providing a waterproof pocket between two double walls, could be walled simple, that is to say that it would contain only the leaves 24 and 26 and that the sheet 24 would not be pierced by the openings 34. Such an enclosure could be used for packaging of a liquid, for example a drink.

Grâce à la conception de l'emballage illustré par les figures 1 à 4, les parois externes 26, 27 peuvent être réalisées en des matériaux différents de ceux des feuilles 24, 25. C'est ainsi que ces parois externes 26, 27 pourraient être, par exemple, plus épaisses. On pourrait aussi imaginer que ces parois externes soient des coques rigides ou semi-rigides.Thanks to the packaging design illustrated by Figures 1 to 4, the outer walls 26, 27 can be made made of materials different from those of the sheets 24, 25. This is how these external walls 26, 27 could be, for example, thicker ones. One could also imagine that these external walls are rigid or semi-rigid shells.

Dans les exemples cités, les parois de l'enceinte sont soudables, notamment par ultra-sons, et sont à base de polyéthylène (PE) ou de polyéthylène linéaire basse densité (LLDPE), de préférence constituées de stratifiés PE/X/PE, X étant constitué par une barrière étanche à l'air telle que polyéthylène vinyl-alcool (EVOH), polyamide (PA) ou polyamide biorienté (OPA). Bien entendu, on pourrait aussi remplacer le soudage par du collage bien que plus compliqué à mettre en oeuvre. La constitution PE/X/PE permet le soudage sur les deux faces de la feuille.In the examples cited, the walls of the enclosure are weldable, in particular by ultrasound, and are based on polyethylene (PE) or linear low density polyethylene (LLDPE), preferably made of PE / X / PE laminates, X being made up by an airtight barrier such as polyethylene vinyl alcohol (EVOH), polyamide (PA) or bioriented polyamide (OPA). Good of course, we could also replace welding with gluing although more complicated to implement. The Constitution PE / X / PE allows welding on both sides of the sheet.

On peut aussi faire remarquer que les lignes de soudage 28 et 29 reliant la ligne de soudage 29' à la feuille 24 ne sont pas indispensables. On a toutefois constaté qu'elles sont utiles, dans la mesure où elles assurent un bon positionnement de la valve à l'intérieur de l'enceinte au moment du gonflage. On a aussi constaté qu'il est préférable de relier le fond de la poche au fond de l'enceinte. Toutefois, cette mesure n'est pas indispensable non plus et les feuilles 24 et 25 pourraient être interrompues au niveau de la ligne de soudage 33 délimitant le fond de la poche.It can also be noted that the welding lines 28 and 29 connecting the welding line 29 ′ to the sheet 24 are not not essential. However, it has been found that they are useful, insofar as they ensure good positioning of the valve inside the enclosure during inflation. We have also found that it is preferable to connect the bottom of the pocket at the bottom of the enclosure. However, this measure is not essential either and sheets 24 and 25 could be interrupted at the welding line 33 delimiting the pocket bottom.

Bien entendu, hormis les lignes de pliage des feuilles qui sont droites pour ne pas créer de problèmes de fronces dans les bandes repliées, le reste du pourtour de l'enceinte peut avoir une autre forme que quadrangulaire. Il suffit pour cela de découper les feuilles à la forme désirée, avant ou après le soudage, les lignes de soudage suivant alors cette forme.Of course, apart from the fold lines of the sheets which are straight so as not to create puckering problems in the folded bands, the rest of the perimeter of the enclosure may have another form than quadrangular. It is enough for that cut the leaves to the desired shape, before or after welding, the welding lines then following this form.

Précisons également que l'emballage selon les figures 1 à 5 pourrait aussi être pourvu d'une partie s'étendant à l'extérieur de l'enceinte au-delà d'au moins une des soudures 35 ou 36, cette partie pouvant servir à ménager une anse par exemple, ou à former un rabat pour protéger l'accès à la valve.Note also that the packaging according to Figures 1 to 5 could also be provided with a part extending outside of the enclosure beyond at least one of the welds 35 or 36, this part being able to be used to spare a handle by example, or to form a flap to protect access to the valve.

La figure 6 représente une feuille quadrangulaire 40 dans laquelle on a percé un orifice 41 que l'on a recouvert d'un opercule 42.FIG. 6 represents a quadrangular sheet 40 in which we drilled an orifice 41 which we covered with a cover 42.

Cette feuille 40 est découpée dans un rouleau déroulé à plat sur une ligne horizontale ou verticale de production dans un bain de peroxyde d'hydrogène afin de garantir l'aseptie du matériau d'emballage. Le déroulement du film ou de la feuille s'effectue parallèlement aux soudures du haut et du bas du sachet. La valve dont on va décrire tout d'abord la fabrication est réalisée par étapes dans le sens du déroulement de la bobine du film.This sheet 40 is cut from a roll unrolled at flat on a horizontal or vertical production line in a hydrogen peroxide bath to guarantee aseptic packaging material. The unfolding of the film or sheet runs parallel to the top and bottom welds of the bag. The valve which we will first describe the manufacturing is carried out in stages in the direction of the course of the film reel.

La figure 7 montre cette même feuille 40 dont on a replié une bande marginale 40a sur la face avant de la feuille 40 au niveau du centre de l'orifice 41. On soude la bande marginale 40a par deux soudures parallèles obliques 43,44 délimitant ce qui sera la valve et par des soudures 45,46,47 parallèles à la ligne de pliage de la bande marginale 40a reliant chaque extrémité des soudures 43,44 aux deux bords latéraux de la feuille 40.Figure 7 shows this same sheet 40 which has been folded a marginal strip 40a on the front face of the sheet 40 at level of the center of orifice 41. The marginal strip is welded 40a by two oblique parallel welds 43,44 delimiting this which will be the valve and by welds 45,46,47 parallel to the fold line of marginal strip 40a connecting each end of the welds 43,44 at the two lateral edges of the sheet 40.

La figure 8 montre le repli dans l'autre sens (flèche F) que précédemment de la bande marginale 40a avec la partie 40b de la feuille 40 à laquelle elle a été soudée.Figure 8 shows the fold in the other direction (arrow F) than previously of marginal strip 40a with part 40b sheet 40 to which it was welded.

La figure 9 montre le soudage 46a de la feuille 40 aux bandes 40a et 40b le long de la même ligne de soudage que le soudage 46. Ce soudage 46a a pour but de permettre le guidage d'une paille entre les lignes de soudage obliques 43,44 délimitant la valve.Figure 9 shows the welding 46a of the sheet 40 aux strips 40a and 40b along the same welding line as the welding 46. The purpose of this welding 46a is to allow guiding of a straw between the oblique welding lines 43,44 delimiting the valve.

Sur la figure 10, on a montré la formation d'un sachet constituant l'enceinte étanche. En plus de la feuille 40 et de la valve dont on vient de décrire les étapes de formation, le sachet comporte une feuille quadrangulaire 48 de mêmes dimensions que la feuille 40 munie de sa valve et un soufflet 49 destiné à former le fond du sachet permettant de tenir en position verticale sur une surface horizontale. In Figure 10, we showed the formation of a sachet constituting the sealed enclosure. In addition to sheet 40 and the valve whose formation stages have just been described, the bag has a quadrangular sheet 48 of the same dimensions that the sheet 40 provided with its valve and a bellows 49 intended to form the bottom of the bag making it possible to hold in vertical position on a horizontal surface.

Pour permettre le soudage du soufflet 49 au bas des feuilles 40 et 48 sans que les faces externes du soufflet ne se soudent entre elles, celui-ci est constitué par un stratifié dont la couche interne est en un thermoplastique, par exemple du polyéthylène et dont la couche externe est en un thermodurcissable, par exemple de l'OPA.To allow the welding of the bellows 49 at the bottom of the sheets 40 and 48 without the external faces of the bellows weld together, this is made up of a laminate with an inner layer of thermoplastic, for example polyethylene and the outer layer of which is a thermosetting agent, for example OPA.

La figure 11 montre les deux soudures latérales 50,51 reliant les feuilles 40 et 48 l'une à l'autre et les deux soudures du fond 52,53 reliant le soufflet 49 respectivement aux feuilles 48 et 40. Par contre, le bord supérieur des feuilles 40 et 48 n'est pas soudé, ménageant une ouverture 54 pour le remplissage de l'enceinte.Figure 11 shows the two side welds 50,51 connecting sheets 40 and 48 to each other and the two bottom welds 52.53 connecting the bellows 49 respectively on sheets 48 and 40. On the other hand, the upper edge of sheets 40 and 48 are not welded, leaving an opening 54 for filling the enclosure.

Enfin la figure 12 illustre l'emballage terminé avec les bords supérieurs des feuilles 40,48 réunis par une soudure 55. Une paille 56 est engagée dans le conduit ménagé entre les soudures 43 et 44 formant la valve et est fixée par ailleurs sur la face externe de la feuille 40 par un ruban adhésif 57.Finally, Figure 12 illustrates the finished packaging with the upper edges of the sheets 40,48 joined by a weld 55. A straw 56 is engaged in the conduit formed between the welds 43 and 44 forming the valve and is also fixed on the external face of the sheet 40 by an adhesive tape 57.

Pour consommer la boisson, il suffit d'enlever l'adhésif 57 pour dégager la paille 56 et de la pousser vers l'intérieur de l'enceinte en perforant l'opercule qui peut être une fine pastille d'aluminium. Lorsque la paille 56 est enlevée, les deux parois du canal ménagé entre les soudures 43 et 44 se referment et si l'enceinte est retournée, la pression exercée par le liquide ferme ce canal hermétiquement. En variante, à la place de l'ouverture 41 et de l'opercule 42 on peut également remplacer l'ouverture par un pré-découpage du film 40.To consume the drink, just remove the adhesive 57 to clear the straw 56 and push it inward of the enclosure by perforating the cover which can be a fine aluminum pellet. When straw 56 is removed, the two walls of the channel formed between the welds 43 and 44 are close again and if the enclosure is turned over, the pressure exerted by the liquid closes this channel tightly. Alternatively, at instead of the opening 41 and the cover 42 we can also replace the opening with a pre-cut film 40.

Comme on a pu le constater de la description qui précède, le procédé de production permet un conditionnement parfaitement aseptique de la boisson.As we have seen from the above description, the production process allows perfect packaging aseptic drink.

La forme d'exécution des figures 13 à 17 se rapporte à la fabrication de sachets à soufflets latéraux destinés à être réalisés sur une ligne de fabrication dont l'axe de la machine est parallèle à l'axe vertical du sachet. La position de la valve doit être telle que les opérations de pliage soient réalisées en continu dans l'axe de la machine. Cette contrainte implique un positionnement de la valve sur une partie latérale du sachet. The embodiment of Figures 13 to 17 relates to the manufacture of side bellows bags intended to be carried out on a production line including the machine axis is parallel to the vertical axis of the bag. The position of the valve must be such that the folding operations are carried out continuously in the axis of the machine. This constraint involves positioning the valve on a part side of the bag.

Hormis cette différence, la formation de la valve que l'on voit sur la figure 13 correspond en tous points à ce qui est décrit et représenté en relation avec les figures 5 à 9, de sorte que l'on a laissé les mêmes chiffres de références pour cette partie de l'enceinte.Aside from this difference, the valve formation that we see in Figure 13 corresponds in all points to what is described and represented in relation to FIGS. 5 to 9, so we left the same reference numbers for this part of the enclosure.

Pour réaliser cette enceinte on forme une feuille 60 de même dimension que la feuille 40 mais munie d'un soufflet 61,62 formé sur chacun des bords latéraux opposés. On forme (figure 15) des soudures au nombre de quatre, deux soudures 63 pour fixer les soufflets 61,62 à la feuille 40 et deux soudures 64 pour rigidifier le sachet.To make this enclosure, a sheet 60 of same size as sheet 40 but fitted with a bellows 61.62 formed on each of the opposite side edges. Forming (figure 15) welds four in number, two welds 63 to fix the bellows 61,62 to sheet 40 and two solders 64 to stiffen the bag.

La figure 16 montre le soudage du fond 65 alors qu'une ouverture 66 est laissée au haut du sachet pour permettre le remplissage. Le sachet fermé par une soudure 67 (figure 17) peut être posé sur la soudure du fond 65 qui s'aplatira sous le poids du liquide, alors que le canal ménagé entre les soudures 43 et 44 formant valve permet d'accéder à la boisson après perforation de l'opercule 42.Figure 16 shows the welding of the bottom 65 while a opening 66 is left at the top of the bag to allow filling. The bag closed by a seal 67 (figure 17) can be placed on the bottom weld 65 which will flatten under the weight of the liquid, while the channel formed between the welds 43 and 44 forming a valve allows access to the drink after perforation of the cover 42.

La variante de la figure 18 montre le sachet de la figure 12 dans lequel la soudure 46a a été supprimée et le canal de la valve ménagé entre les soudures 44' et 50 (parallèlement au bord du sachet et non plus obliquement) est plus allongé afin de former entre les soudures 44',45' et 51 une poche destinée à recevoir la paille 56. En effet, comme l'emballage constitué par l'enceinte étanche est conçu spécialement pour permettre de consommer la boisson en plusieurs fois, il est utile de disposer d'un espace de rangement pour la paille 56, celle-ci étant indispensable pour pénétrer dans l'enceinte à travers le canal formé entre les soudures 44' et 50. La poche contenant la paille peut être munie d'un système de fermeture du type bande auto-collante le long de son bord supérieur en lieu et place de la soudure 46a de la figure 12 ou d'une fermeture connue sous la marque Mini-gripR.The variant of Figure 18 shows the bag of Figure 12 in which the weld 46a has been removed and the valve channel formed between the welds 44 'and 50 (parallel to the edge of the bag and no longer obliquely) is more elongated so to form between the welds 44 ′, 45 ′ and 51 a pocket intended to receive the straw 56. In fact, since the packaging constituted by the sealed enclosure is specially designed to allow the drink to be consumed in several installments, it is useful to have a storage space for the straw 56, this being essential for entering the enclosure through the channel formed between the welds 44 'and 50. The pocket containing the straw can be provided with a system of closure of the self-adhesive strip type along its upper edge in place of the weld 46a of FIG. 12 or of a closure known under the brand Mini-grip R.

Selon une autre variante, une poche 68 peut être ménagée dans une des feuilles 40 ou 48 formant la paroi de l'enceinte, cette poche 68 servant de logement à la paille.According to another variant, a pocket 68 can be provided in one of the sheets 40 or 48 forming the wall of the enclosure, this pocket 68 serving as housing for the straw.

L'enceinte étanche décrite jusqu'ici est réalisée à partir d'une feuille formant au moins une paroi de l'enceinte et dans une bande marginale de laquelle on obtient par pliage et soudage, comme décrit ci-dessus, une valve permettant de contrôler l'écoulement d'un fluide dans ou hors de l'enceinte étanche et de maintenir cette enceinte fermée.The waterproof enclosure described so far is made at from a sheet forming at least one wall of the enclosure and in a marginal strip from which we obtain by folding and welding, as described above, a valve allowing control the flow of a fluid in or out of the enclosure waterproof and keep this enclosure closed.

Cette forme d'exécution suppose nécessairement que la feuille formant cette paroi de l'enceinte et la valve soient réalisées dans un même matériau de même épaisseur. Or, la valve pour bien se fermer nécessite un matériau très souple et aussi mince que possible. Par contre, on peut souhaiter que la paroi de l'enceinte soit plus épaisse et qu'elle soit de préférence en un matériau stratifié tel que PE/X/PE, X étant une barrière étanche au gaz telle que le polyéthylène vinyl-alcool (EVOH), le polyamide (PA) ou le polyamide biorienté (OPA), alors qu'un tel stratifié ne présente pas d'intérêt particulier pour la valve.This form of execution necessarily assumes that the sheet forming this wall of the enclosure and the valve be made of the same material of the same thickness. Now, the valve to close properly requires a very flexible material and as thin as possible. However, we may wish that the wall of the enclosure is thicker and that it is preferably a laminated material such as PE / X / PE, X being a gas-tight barrier such as polyethylene vinyl alcohol (EVOH), polyamide (PA) or bi-oriented polyamide (OPA), while such a laminate is of no interest especially for the valve.

C'est la raison pour laquelle on a imaginé de réaliser la feuille 70 (figure 20) et la bande marginale 71 en deux épaisseurs différentes d'un même matériau ou de matériaux différents. C'est ainsi que la feuille 70 sera réalisée dans un matériau stratifié susmentionné, alors que la bande marginale 71 sera formée d'une seule couche de PE. Cette feuille 70 et cette bande marginale sont déroulées de deux bobines et disposées bord à bord (figure 20a) puis soudées l'une à l'autre par une soudure 72 (figure 20b). Ensuite, la bande marginale 71 est pliée au milieu de sa largeur (figure 20c). On réalise une soudure 73 le long du pli et deux soudures parallèles 74, 75 entre la soudure 73 et une soudure parallèle 76 comme dans les formes d'exécution précédentes, cette soudure 76 s'interrompant entre les soudures 74 et 75.This is the reason why we imagined to realize the sheet 70 (figure 20) and marginal strip 71 in two different thicknesses of the same material or materials different. This is how sheet 70 will be produced in a laminate material mentioned above, while the marginal strip 71 will be formed from a single layer of PE. This sheet 70 and this marginal strip are unwound from two reels and arranged edge to edge (Figure 20a) then welded one to the other the other by a weld 72 (Figure 20b). Then the tape marginal 71 is folded in the middle of its width (figure 20c). A weld 73 is made along the fold and two welds 74, 75 between the weld 73 and a parallel weld 76 as in the previous embodiments, this weld 76 is interrupted between welds 74 and 75.

Ensuite (figure 20e), on découpe la soudure 73 entre les soudures parallèles 74, 75 pour former le canal et on ménage deux découpes 74a, 75a au milieu de la largeur des soudures 74, 75. Ces découpes sont destinées à libérer une partie de la longueur de la valve de la bande marginale 71 dans laquelle elle est formée, permettant d'augmenter l'efficacité de la pression s'exerçant sur les faces externes de la valve et servant à la fermer comme expliqué précédemment. Il est à noter que ces découpes peuvent avantageusement être également pratiquées sur les valves des formes d'exécution précédentes.Then (FIG. 20e), the weld 73 is cut between the parallel welds 74, 75 to form the channel and we spare two cutouts 74a, 75a in the middle of the width of the welds 74, 75. These cutouts are intended to release part of the length of the valve of the marginal strip 71 in which it is formed, making it possible to increase the effectiveness of the pressure exerted on the external faces of the valve and used to close it as explained above. He is at note that these cutouts can advantageously also be practiced on the valves of the previous embodiments.

Enfin, la bande marginale 71 dans laquelle est formée la valve est repliée sur la face arrière de la feuille 70 par rapport à la figure 20e, comme le montre la figure 20f après quoi l'enceinte est terminée comme dans les formes d'exécution précédentes, en soudant une autre feuille identique à la feuille 70, le long du bord libre de la bande marginale (figure 20f) et le long des trois côtés de la feuille 70 non adjacent à ce bord libre fermant ainsi l'enceinte sur quatre côtés.Finally, the marginal strip 71 in which the valve is folded over the rear face of the sheet 70 by compared to figure 20e, as shown in figure 20f after what the enclosure is finished as in the embodiments previous, by welding another sheet identical to the sheet 70, along the free edge of the marginal strip (figure 20f) and along the three sides of the sheet 70 no adjacent to this free edge thus closing the enclosure on four sides.

La variante des figures 21a à 21d diffère de la précédente par le seul fait que la valve, réalisée dans une autre matériau que la feuille 70', destinée à former une paroi de l'enceinte étanche, est formée comme précédemment par pliage et soudage avant d'être fixée à la feuille 70'. On part d'une bande séparée 71' pliée en deux (figure 21a) et on forme une soudure 73 le long du pli. On ménage les soudures non convergentes 74, 75 ainsi que la soudure 76 reliant une des extrémités des soudures non convergentes 74, 75 aux bords transversaux de la bande 71', on ménage la découpe entre les soudures 74, 75 dans la soudure 73 de la bande (figure 21c), de préférence on effectue les découpes 74a, 75a sur une partie de la longueur des soudures 74, 75. Ensuite (figure 21d), on soude un des bords libres de la bande 71' à un bord de la feuille 70' et on termine l'enceinte en soudant une seconde feuille (non représentée) au moins dans le cas d'une enceinte à simple paroi, comme dans les formes d'exécution précédentes. On peut évidemment aussi fixer un ou des soufflets comme décrit précédemment entre les deux feuilles.The variant of Figures 21a to 21d differs from the by the mere fact that the valve, made in a other material than sheet 70 ', intended to form a wall of the sealed enclosure, is formed as before by folding and welding before being fixed to the sheet 70 '. We leave a separate strip 71 'folded in half (Figure 21a) and we form a weld 73 along the fold. We protect the welds not 74, 75 as well as the weld 76 connecting one of the ends of non-converging welds 74, 75 at the edges transverse of the strip 71 ′, the cutout is spared between the welds 74, 75 in the weld 73 of the strip (FIG. 21c), preferably cuts 74a, 75a are made on a part the length of the welds 74, 75. Then (Figure 21d), we welds one of the free edges of the strip 71 'to one edge of the sheet 70 'and we finish the enclosure by welding a second sheet (not shown) at least in the case of an enclosure single wall, as in the previous embodiments. We can obviously also fix one or more bellows like described above between the two sheets.

Comme autre alternative aux formes d'exécution des figures 20 et 21, on peut obtenir le même résultat en partant, comme précédemment, d'une feuille unique multicouches 84 présentant une partie marginale différente, par exemple monocouche 85 dans laquelle on forme la valve comme expliqué précédemment.As another alternative to the forms of execution of Figures 20 and 21, we can obtain the same result by starting, as before, of a single multilayer sheet 84 with a different marginal part, for example monolayer 85 in which the valve is formed as explained previously.

La forme d'exécution de la figure 18 propose de réaliser une poche pour y loger une paille 56, destinée à consommer le contenu liquide de l'enceinte. La figure 23 illustre une variante de cette forme d'exécution dans laquelle l'enceinte à simple paroi avec la valve est du même type que dans la forme d'exécution de la figure 11. Toutefois, cette variante en diffère du fait qu'une poche externe est ménagée entre une paroi externe de l'enceinte et une troisième paroi 77 soudée sur trois côtés 78, 79, 80 aux bords correspondants de l'enceinte, mais s'arrêtant à une certaine distance du quatrième côté 81, permettant ainsi d'accéder à l'intérieur de la poche destinée à recevoir une paille 82. L'ouverture de cette poche est fermée par une bande autocollante 83 qui s'étend du bord 81 de l'enceinte jusqu'au dessous du bord supérieur non soudé de la feuille 77. Dans cette variante, la feuille formant la paroi de l'enceinte adjacente à la poche peut être la feuille solidaire de la valve semblable aux valves des formes d'exécution décrites précédemment. Etant donné que cette paroi est recouverte par la feuille 77 formant la poche et par la bande autocollante 83, la feuille formant cette paroi et la valve peut être réalisée en un matériau plus mince que celle de l'autre paroi de l'enceinte et de la feuille 77.The embodiment of Figure 18 proposes to achieve a pocket for accommodating a straw 56 therein, intended to consume the liquid contents of the enclosure. Figure 23 illustrates a variant of this embodiment in which the enclosure single wall with valve is of the same type as in shape of execution of FIG. 11. However, this variant in differs from the fact that an external pocket is provided between a outer wall of the enclosure and a third wall 77 welded on three sides 78, 79, 80 at the corresponding edges of the enclosure, but stopping at a certain distance from the fourth side 81, thus allowing access to the interior of the pocket intended to receive a straw 82. The opening of this pocket is closed by an adhesive strip 83 which extends from the edge 81 of the enclosure to below the edge upper non-welded sheet 77. In this variant, the sheet forming the wall of the enclosure adjacent to the pocket may be the sheet integral with the valve similar to valves of the embodiments described above. Being given that this wall is covered by the sheet 77 forming the pocket and by the self-adhesive strip 83, the sheet forming this wall and the valve can be made of a more material thinner than that of the other wall of the enclosure and the sheet 77.

La variante illustrée par la figure 24 montre une enceinte 90 munie de la valve formée entre deux soudures parallèles 86, 87 reliant deux soudures 88, 89 s'étendant entre deux bords opposés de l'enceinte 90. Les soudures parallèles 86, 87 sont ménagées de manière à former chacune un épaississement progressif 86a, 87a dans le canal 91 de la valve, rétrécissant la section de celui-ci en forme d'entonnoir jusqu'à un point où les soudures 86, 87 reprennent brusquement leur épaisseur initiale. La grande section de l'entonnoir ainsi formé est tournée vers l'extérieur de l'enceinte 90 et la plus petite section est dirigée vers l'intérieur. Le rapport des longueurs entre l'entrée du canal 91 et la section la plus faible 91a de l'entonnoir, d'une part et cette section la plus faible 91a et l'extrémité du canal 91 débouchant dans l'enceinte 90, d'autre part, est d'environ 2/3, 1/3. Le but de cette valve dont le canal 91 est divisé en deux parties dont la frontière est située au niveau de la section la plus faible de l'entonnoir 91a est, dans le cas d'une enceinte de conditionnement d'un liquide, de permettre de retirer partiellement la paille au-dessus du niveau de la section 91a en la laissant dans la partie supérieure du canal 91, la partie inférieure du canal 91 se refermant, quand bien même la paille soit engagée dans la partie supérieure du canal 91. Bien entendu, cette forme de valve est utilisable dans le cas de toutes les formes d'exécution précédentes d'enceintes destinées au conditionnement de liquides. La paille pourrait d'ailleurs être remplacée par un bec verseur, notamment dans le cas du conditionnement de produits liquides autres que des boissons.The variant illustrated in Figure 24 shows a enclosure 90 provided with the valve formed between two parallel welds 86, 87 connecting two welds 88, 89 extending between two opposite edges of the enclosure 90. The parallel welds 86, 87 are arranged so as to each form a thickening 86a, 87a in channel 91 of the valve, narrowing the funnel-shaped section of it to a point where the welds 86, 87 suddenly resume their initial thickness. The large section of the funnel thus formed is turned towards the outside of the enclosure 90 and the smallest section is directed inward. The length ratio between the entrance to channel 91 and the section the lower 91a of the funnel, on the one hand and this section the weakest 91a and the end of the channel 91 opening into enclosure 90, on the other hand, is about 2/3, 1/3. The goal of this valve, the channel 91 of which is divided into two parts, the border is located at the level of the weakest section of the funnel 91a is, in the case of an enclosure of conditioning of a liquid, to allow to partially withdraw the straw above the level of section 91a in the leaving in the upper part of channel 91, the part bottom of channel 91 closing, even if the straw is engaged in the upper part of channel 91. Good of course, this form of valve can be used in the case of all previous embodiments of speakers intended for the packaging of liquids. Straw could moreover be replaced by a spout, especially in the packaging of liquid products other than drinks.

Toutes les formes d'exécution précédentes montrent un découpage 32, 41 ménagé dans le pli de la feuille entre les soudures parallèles 30, 31 ou 43, 44 etc. ménageant le canal de la valve. A titre de variante et notamment dans les formes d'exécution des figures 20 et 21 où la valve est réalisée dans un autre matériau que les parois de l'enceinte, on pourrait utiliser pour la valve un film très mince, non découpé ou prédécoupé dans le pli du film, réalisé en un matériau présentant des propriétés élastomériques d'une élasticité suffisante pour ne pas se déformer de manière non élastique par la contrainte résultant de l'introduction de la paille dans le canal et susceptible d'être perforé par la paille lorsqu'elle arrive au fond du canal non percé. Un tel film peut être réalisé en polyoléfines telles que les terpolymères comprenant de l'éthylène, du propylène et une chaíne longue diénique tels que l'Hifax XTRR, le TeclarR, le RoyalèneR ou le TrefsinR.All the previous embodiments show a cutout 32, 41 formed in the fold of the sheet between the parallel welds 30, 31 or 43, 44 etc. sparing the valve channel. Alternatively and in particular in the embodiments of Figures 20 and 21 where the valve is made of a material other than the walls of the enclosure, one could use for the valve a very thin film, uncut or precut in the fold of the film, made of a material having elastomeric properties of sufficient elasticity not to deform in a non-elastic manner by the stress resulting from the introduction of the straw into the channel and capable of being perforated by the straw when it reaches the bottom of the undrilled channel. Such a film can be produced in polyolefins such as terpolymers comprising ethylene, propylene and a long diene chain such as the Halifax XTR R , Teclar R , Royalene R or Trefsin R.

Toutes les formes d'exécution décrites peuvent être réalisées à partir de longueurs infinies de matériau en feuille ou en film jusqu'à l'obtention des enceintes étanches qui sont alors séparées les unes des autres. L'avantage de ce procédé de fabrication réside dans le fait qu'aussi bien la formation de la valve que celle de l'enceinte, à deux ou à quatre parois, sont réalisées par pliage et/ou soudage longitudinal, au fur et à mesure de l'avance du matériau en feuille. De ce fait, la valve une fois réalisée, si elle est obtenue dans un autre matériau en feuille que celui de l'enceinte elle-même, est intégrée à l'enceinte sans être découpée au préalable, évitant de devoir positionner la valve, ce qui constitue une opération complexe, ralentissant la cadence et onéreuse sur le plan de l'investissement.All the described embodiments can be made from infinite lengths of material in sheet or film until waterproof enclosures are obtained which are then separated from each other. The advantage of this manufacturing process is that both the valve formation than that of the enclosure, in pairs or four walls, are made by folding and / or welding longitudinal, as the material advances leaf. Therefore, the valve once made, if it is obtained in another sheet material than that of the enclosure itself, is integrated into the enclosure without being cut beforehand, avoiding having to position the valve, which is a complex operation, slowing down the pace and expensive in terms of investment.

La figure 25 illustre un procédé de fabrication d'une enceinte étanche que la figure 26 montre en coupe. Ce procédé est donc réalisé en continu à partir de deux films 92 et 93 que l'on déroule et sur lesquels on effectue des pliages et des soudages au fur et à mesure de leur avance. Les différentes étapes du procédé sont illustrées par différentes coupes en perspective des matériaux en feuilles. Il est cependant précisé que ces coupes ne sont là que pour montrer les diverses opérations effectuées mais que les matériaux en feuilles ne sont sectionnés que lorsque l'enceinte étanche est terminée. On voit d'abord le film 92 destiné à former la valve. Ce film 92 est tout d'abord pliée longitudinalement en deux parties 92a,92b de largeurs inégales. Ces deux parties sont soudées par deux soudures longitudinales 94 avec interruption entre deux soudures obliques parallèles 95 destinées à ménager le canal de la valve. A l'étape suivante, une découpe 96 est ménagée dans le pli de la feuille 92 entre les deux soudures obliques 95.Figure 25 illustrates a method of manufacturing a sealed enclosure that Figure 26 shows in section. This process is therefore produced continuously from two films 92 and 93 that we unroll and on which we fold and welds as they advance. The different process steps are illustrated by different perspective cuts of sheet materials. It is however clarified that these cuts are only there to show the various operations carried out but that the materials in sheets are only cut when the sealed enclosure is finished. We first see the film 92 intended to form the valve. This film 92 is first of all folded longitudinally in two parts 92a, 92b of unequal widths. These two parts are welded by two longitudinal welds 94 with interruption between two parallel oblique welds 95 intended to spare the valve channel. In the next step, a cutout 96 is provided in the fold of the sheet 92 between the two oblique welds 95.

Le second film 93 destiné à former l'enceinte étanche est déroulé à l'étape suivante, le long du bord de la partie 92a de la valve formée dans le film 92. Le guide séparateur 97 est disposé dans la trajectoire du film 92 et est destiné à s'insérer entre les parties 92a,92b. Ce séparateur 97 est destiné à permettre le soudage du bord de la partie 92a avec celui du film 93 sans que la partie 92b ne se soude à eux.The second film 93 intended to form the sealed enclosure is rolled out in the next step, along the edge of part 92a of the valve formed in the film 92. The separator guide 97 is arranged in the path of the film 92 and is intended for fit between the parts 92a, 92b. This separator 97 is intended to allow the welding of the edge of the part 92a with that of the film 93 without the part 92b being welded to them.

Dans les étapes suivantes, le film 93 est conformé pour réaliser l'enceinte 98 illustrée en coupe par la figure 26, avec deux soufflets latéraux 99. Enfin, le second bord longitudinal du film 93 est soudé au bord longitudinal de la partie 92b du film 92, ces deux bords longitudinaux étant préalablement pliés à 90°. Ainsi, cette enceinte étanche présente un accès à l'entrée du canal formé entre les deux soudures obliques 95 situé sur une grande face de l'enceinte et non plus dans un bord de celui-ci comme jusqu'ici. In the following steps, the film 93 is shaped to make the enclosure 98 illustrated in section in FIG. 26, with two side gussets 99. Finally, the second edge longitudinal of the film 93 is welded to the longitudinal edge of the part 92b of film 92, these two longitudinal edges being previously bent at 90 °. So this waterproof enclosure has access to the entrance to the canal formed between the two oblique welds 95 located on a large face of the enclosure and no longer in an edge of it like so far.

La variante illustrée par les figures 27 et 28 se rapporte à un procédé de fabrication auquel est intégrée une unité de remplissage de l'enceinte par un produit liquide destiné à être conditionné dans cette enceinte. Comme dans l'exemple précédent, on part de deux films 100,101 respectivement pour réaliser la valve 102 de la même manière que précédemment, par pliage de largeurs inégales 100a, 100b, le bord de la partie 100a étant soudé à un bord du film 101.The variant illustrated in Figures 27 and 28 is relates to a manufacturing process in which a enclosure filling unit with a liquid product intended to be conditioned in this enclosure. As in the previous example, we start from two films 100,101 respectively to make the valve 102 in the same way as previously, by folding unequal widths 100a, 100b, the edge of the part 100a being welded to an edge of the film 101.

Ensuite, le film 101 avec la valve 102 est mis sous forme tubulaire autour d'une trémie de remplissage 103 et une soudure longitudinale 104 (figure 28) est réalisée entre le bord de la partie 100b et l'autre bord du film 101, fermant ainsi l'élément tubulaire formé autour de la trémie 103. Des soudures transversales 105 sont pratiquées à intervalles réguliers au fur et à mesure de l'avance de l'élément tubulaire. Entre deux soudures transversales 105, une dose de produit à conditionner est versée par la trémie 103 et les sachets ainsi remplis sont séparés les uns des autres au milieu de la largeur des soudures transversales 105.Then the film 101 with the valve 102 is formed tubular around a filling hopper 103 and a longitudinal weld 104 (Figure 28) is made between the edge of part 100b and the other edge of film 101, closing thus the tubular element formed around the hopper 103. 105 transverse welds are made at intervals regular as the element advances tubular. Between two transverse welds 105, a dose of product to be packaged is poured through the hopper 103 and the pouches thus filled are separated from each other at middle of the width of the transverse welds 105.

Les figures 29,30 illustrent encore un autre procédé de fabrication d'un emballage étanche qui se différencie des formes d'exécutions décrites jusqu'ici par le fait que l'on accède au canal 106 de la valve 107 par une ouverture 108 découpée dans un film 109 destiné à former une paroi du sachet étanche. Comme le montre la figure 29, au lieu de former la valve par pliage d'une feuille, on peut obtenir le même résultat en soudant les bords longitudinaux adjacents de deux bandes 110,111 de largeurs inégales. Ces deux modes de réalisation de la valve sont interchangeables et dépendent du choix du fabricant. Ensuite comme on peut le constater sur la figure 29, le bord libre de la bande 110 est soudé à la face interne du film 109, avec l'aide d'un guide séparateur 112, puis c'est le bord de la bande 111 qui est soudé à la même face interne du film 109 avec l'aide d'un autre guide séparateur 113. Les deux bords libres respectifs des bandes 110 et 111 sont soudés de part et d'autre de l'ouverture 108 permettant ainsi d'accéder au canal 106 de la valve 107. Finalement, un film 114 est déroulé et soudé aux deux bords longitudinaux du film 109. Ensuite, comme dans toutes les formes d'exécution précédentes, l'ensemble des films superposés et, dans cet exemple, seulement soudés longitudidnalement à l'exception du canal 106, sont soudés transversalement et découpés au milieu de la largeur de la soudure transversale pour séparer les sachets.Figures 29.30 illustrate yet another method of manufacture of waterproof packaging that differs from forms of execution described so far by the fact that we accesses channel 106 of valve 107 through an opening 108 cut from a film 109 intended to form a wall of the sachet waterproof. As shown in Figure 29, instead of forming the valve by folding a sheet, we can get the same result by welding the adjacent longitudinal edges of two 110,111 bands of unequal widths. These two modes of valve design are interchangeable and depend on choice of manufacturer. Then as we can see on the Figure 29, the free edge of the strip 110 is welded to the face internal film 109, with the help of a separator guide 112, then it is the edge of the strip 111 which is welded to the same inner side of film 109 with the help of another guide separator 113. The two respective free edges of the strips 110 and 111 are welded on either side of the opening 108 thus allowing access to the channel 106 of the valve 107. Finally, a film 114 is unwound and welded at the two edges film 109. Then, as in all previous embodiments, all of the films superimposed and, in this example, only welded longitudinally with the exception of channel 106, are welded transversely and cut in the middle of the width of the transverse weld to separate the sachets.

Dans les divers modes de réalisation du procédé selon l'invention décrits jusqu'ici, lorsque l'on ne veut pas souder ensemble toutes les épaisseurs de films superposées mais seulement certaines d'entre elles, on insère un séparateur entre les films, réalisé en un matériau non soudable avec celui de ces films. A titre de variante, le séparateur peut être remplacé par un vernis thermo-résistant appliqué au revers du film dont l'avers doit être soudé, ce vernis épousant la forme de la ou des soudures à effectuer sur la face à souder. C'est ainsi que l'on peut réaliser le soudage de la valve en même temps que le soudage de cette valve au film formant les parois du sachet étanche, en revêtant le film de la valve d'un tel vernis à l'endroit des soudures de formation de la valve. A titre d'exemple, le vernis thermo-résistant pourrait être un vernis polyuréthane ou un vernis acrylique.In the various embodiments of the method according to the invention described so far, when one does not want to weld together all the thicknesses of superimposed films but only some of them, we insert a separator between films, made of a non-weldable material with that of these films. Alternatively, the separator can be replaced by a heat-resistant varnish applied to reverse of the film whose obverse must be welded, this varnish conforming to the shape of the weld (s) to be made on the face to solder. This is how welding can be done of the valve at the same time as the welding of this valve to the film forming the walls of the sealed bag, coating the film of the valve of such a varnish at the place of the welds of valve formation. For example, heat-resistant varnish could be a polyurethane varnish or a varnish acrylic.

La figure 31 est une variante du sachet étanche illustré par la figure 5. Dans cette variante, le film 24 formant la valve 24a,24b est muni d'une ouverture découpée 115 bouchée par une languette 116 partiellement soudée ou collée au film 24 pour fermer l'ouverture 115 hermétiquement. En saisissant la partie non soudée de la languette 116, on peut l'arracher afin de dégonfler le sachet.Figure 31 is a variant of the illustrated waterproof bag in FIG. 5. In this variant, the film 24 forming the valve 24a, 24b is provided with a cut-out opening 115 blocked by a tongue 116 partially welded or glued to the film 24 to close the opening 115 hermetically. By grabbing the non-welded part of the tongue 116, it can be torn off to deflate the bag.

Ce sachet comporte encore un rabat 117 soudé au bord 36 et formé par une poche destinée à recevoir une fiche d'expédition postale. Ce rabat 117 recouvre normalement la languette 116 se colle à la feuille 26 et évite ainsi un arrachement accidentel de cette languette.This bag also has a flap 117 welded to the edge 36 and formed by a pocket intended to receive a plug mailing. This flap 117 normally covers the tongue 116 sticks to sheet 26 and thus avoids accidental tearing of this tab.

Enfin, la figure 32 montre une dernière variante de l'enceinte étanche dans laquelle l'enceinte est formée de deux films 118, 119, le film 118 étant replié pour former une des parties 118a de la valve, dont l'autre partie est formée par un film 120 soudé comme toutes les valves précédentes à la partie 118a. Enfin, le bord libre du film 120 est soudé au bord adjacent du film 119. Ainsi, on a montré que la valve peut être intégrée à une paroi de l'enceinte étanche comme dans le cas des figures 1 à 19, que la valve peut être réalisée dans un film séparé de celui de l'enceinte étanche comme dans le cas de la figure 20, que la valve peut être réalisée à l'aide de deux films (figure 29) et enfin qu'elle peut être réalisée par un film soudé à un film replié d'une paroi du sachet. Dans tous les cas la valve est obtenue en continu avec l'enceinte étanche et traverse donc le sachet entre deux bords opposés de cette enceinte étanche.Finally, Figure 32 shows a final variant of the sealed enclosure in which the enclosure is formed of two films 118, 119, the film 118 being folded back to form one of the parts 118a of the valve, the other part of which is formed by a film 120 welded like all the previous valves to the part 118a. Finally, the free edge of the film 120 is welded to the adjacent edge of film 119. Thus, it has been shown that the valve can be integrated into a wall of the sealed enclosure as in the case of FIGS. 1 to 19, that the valve can be produced in a film separate from that of the waterproof enclosure as in the case of figure 20, that the valve can be made with two films (figure 29) and finally that it can be produced by a film welded to a film folded over wall of the bag. In all cases the valve is obtained by continuous with the sealed enclosure and therefore passes through the bag between two opposite edges of this sealed enclosure.

Il est évident pour l'homme de métier que l'enceinte décrite ci-dessus avec sa valve de fermeture étanche peut être réalisée sur d'autres types de machines et que d'autres modes de réalisation sont possibles dans le cadre de l'invention définie par les revendications.It is obvious to those skilled in the art that the enclosure described above with its tight closing valve can be performed on other types of machines and that other modes possible in the context of the invention defined by the claims.

Claims (22)

  1. A sealed enclosure provided with a wall and a valve which extends inside the enclosure and is formed between two flexible sheets (24a, 24b; 40a, 40b; 92a, 92b) extending from one to the other of the two opposed edges (50, 51; 78, 80) of the enclosure and being connected along two non-converging connection lines (30, 31, 43, 44, 95) to define therebetween a duct upon spacing apart said flexible sheets from one another, open at its two ends, one communicating with the inside, the other with the outside of the enclosure, to allow the passage of a fluid between the inside and the outside of the enclosure, said flexible sheets (24a, 24b; 40a, 40b; 92a, 92b) being arranged to be applied against one another upon ceasing of the application thereto of a force tending to hold them apart, thus preventing said fluid from leaving the enclosure, the edges of these flexible sheets (24a, 24b; 40a, 40b; 92a, 92b) adjacent to the opposite edge of said duct, communicating with the outside, being sealingly connected to the wall (26, 48, 93, 109) of this enclosure, characterized in that said opposed edges (50, 51, 78, 80) of the enclosure between which said flexible sheets (24a, 24b; 40a, 40b) extend are assembled to one another such that the corresponding edges of these flexible sheets situated between the said opposite edges (50, 51, 78, 80) of the enclosure are, on the one hand, assembled to one another, and on the other hand, to the opposite edges of the enclosure, and in that said flexible sheets (24a, 24b; 40a, 40b; 92a, 92b) are furthermore connected one to the other by sealed connections (28, 29, 45, 46, 47, 94)from each edge of each of said non-converging connection-lines (30, 31, 43, 44, 95), delimiting said duct up to the said opposite edges (50, 51; 78, 80) of the enclosure, said sealed connection (28, 46, 94) adjacent to the end of said duct communicating with the outside, at least one of said flexible sheets (24a, 24b; 40a, 40b; 92a, 92b) being constituted by an assembly (35, 55, 63) different from that of the adjacent edges of the enclosure.
  2. A sealed enclosure according to claim 1, characterized in that said duct is formed in a marginal strip (71) adjacent an edge of a sheet (70) forming at least one of the walls of said enclosure, said marginal strip being folded about a line (73) parallel to said edge of said sheet (70),
    two non-converging connection lines (74,75) connecting the two parts of said marginal strip (71) folded over on one another, these lines (74,75) extending from the folded edge (73) towards the opposing parallel edge of this marginal strip,
    the two parts thus folded over on one another being applied against one face of said sheet (70) with the free edge of the marginal part (71) situated substantially adjacent to the respective adjacent edges of said sheet (70) and of said marginal strip (71), forming a fold between said sheet (70) and said strip (71),
    the free edge of said strip (71) as well as the free edges of said sheet (70) being sealingly assembled to the adjacent edge of a second wall applied against the face of the first wall (70) adjacent to said marginal strip in such a manner as to form said enclosure containing said folded over marginal strip.
  3. A sealed enclosure according to claim 1, in particular an inflatable enclosure, characterized in that said two connection lines (30,31) stop short of the free edge of said strip (24a) adjacent to the inlet opening of the duct, and said opening is secured to said sheet (24) by a first assemblage line (28) parallel to said free edge and passing through the respective ends of said two connection lines (30, 31) which stop short of this free edge, and by a second assemblage line (29) which substantially follows the edge (29') opposed to said free edge of said strip (24a), said first and second assemblage lines (28,29) that secure said marginal strip (24a) to said sheet (24) stopping in said zone between said two non-converging connection lines (30,31).
  4. A sealed enclosure, in particular an inflatable enclosure, according to claim 3, characterized in that it includes four superimposed walls (24,25,26,27) assembled to one another on at least two opposed sides thereof, the two external walls (26,27) and the two inner walls (24,25) being assembled respectively to one another on a third bottom-forming side (37), whereas each external wall (26,27) is assembled to the adjacent inner wall (24,25) along the fourth side (35,36), thus forming a pocket inside the enclosure.
  5. A sealed enclosure, in particular an inflatable enclosure, according to claim 4, characterized in that the four superimposed sheets (24,25,26,27) have adjacent contours and are assembled along their entire periphery except along the opening of said pocket where the edges of the inner walls (24,25) are separate from one another.
  6. A sealed enclosure, in particular an inflatable enclosure, according to claim 4, characterized in that the two inner walls (24,25) are assembled one to the other (33) to form, inside the periphery of the enclosure, a pocket whose opening is situated facing the enclosure's opening.
  7. A sealed enclosure, in particular an inflatable enclosure, according to claim 6, characterized in that the edges of the pocket defined inside the periphery of the enclosure flare out.
  8. A sealed enclosure according to claim 1, characterized in that a bellows-forming folded part (49;61,62) is inserted between at least two adjacent edges (40,48) of said enclosure and is welded to each of its edges.
  9. A sealed enclosure according to claim 8, characterized in that said bellows-like folded part (49;61,62) is made of a stratified material whose inner layer which comes into contact with the respective adjacent edges of said walls is in heat-weldable thermoplastic material and whose outer layer is in a non-heat-weldable material.
  10. A sealed enclosure according to claim 8, characterized in that said cut-out (41) is made before folding said marginal strip and said cut-out is obturated by means of a perforable patch (42).
  11. A sealed enclosure according to either of claims 2 and 8, characterized in that a pre-cut-out is made in said sheet in the zone situated between the two assembly lines (43,44) which is perforable by introduction of a rod between the assembly lines (43,44).
  12. A sealed enclosure according to claim 2, characterized in that a cut-out or a pre-cut-out (32,41) interrupts the fold (29,45) in the zone extending between the two assembly lines (30,31,43,44) to allow the passage of a fluid in the thus-formed duct.
  13. A sealed enclosure according to claim 2, characterized in that said marginal strip is formed by a strip of the sheet forming at least one of the enclosure's walls.
  14. A sealed enclosure according to claim 2, characterized in that said marginal strip (71,71') is formed by a strip welded to the edge of said sheet, said strip and said sheet being made of two different materials.
  15. A sealed enclosure according to claim 13, characterized in that said marginal strip (85) is formed by one of the constituent layers of a sheet (84) forming at least one of the enclosure's walls.
  16. A sealed enclosure according to claim 2, characterized in that a cut-out (74a, 74b) is made in a portion of the length of each of said assembly lines (74,75) in the median part of their width starting from said folded edge.
  17. A sealed enclosure according to claim 1, characterized in that said non-converging connection lines (86,87) each have a progressive flaring-part (87a,87b) extending in the valve's channel (91) in the direction from the outer end towards the inner end of this channel, this flaring part abruptly terminating, the channel (91) being thus divided longitudinally into two portions, and external portion adapted to serve as receiving means of a liquid distribution duct and an internal valve-forming part whose opening is controlled by longitudinal displacement of the end of said tubular member from the external portion to the internal portion of said channel (91).
  18. A sealed enclosure according to claim 1, characterized in that a third rectangular wall (77) is fixed along a portion of the length of two opposed edges (78, 80) of the enclosure and along the edge (79) connecting these two opposite edges in a manner to form an open pocket along its fourth edge, said pocket being closed by a self-adhesive band (83) covering that part of the enclosure's wall not covered by said third wall (77).
  19. A sealed enclosure in particular a inflatable enclosure according to claim 4, characterized in that one of its walls (24) is perforated (115) and in that a tongue (116) is stuck or welded onto the outer face of the wall (24) to hermetically close the opening, a non-stuck or non-welded part of this tongue (116) serving as gripping means to open the opening (115).
  20. A sealed enclosure according to claim 19, characterized in that a flap is fixed in extension of one of the enclosure's walls, and is removably fixable so as to cover said tongue (116) on said enclosure.
  21. A method of packaging a beverage in the sealed enclosure according to one of claims 1, 2 and 7, characterized in that said valve (30,31,43,44) is firstly formed adjacent one of the edges of one of the walls (26,40) of the enclosure, the second wall (28,48) of the enclosure is welded to the first wall in a manner to close the bottom end of the enclosure as well as its lateral edges, a metered quantity of liquid is introduced between the non-welded edges of the upper edge of the enclosure and the enclosure is closed- by welding together the two upper edges (35,55,67).
  22. A method of manufacturing the sealed enclosure according to one of claims 1-20, characterized in that both the valve and the sealed enclosure are made of endless sheet material that is fed while superpositioning the different sheets as the feeding progresses, by folding and/or by adding another sheet material and welding parallel to the direction of feed, apart from said two non-converging connecting lines and, finally, a weld transverse to the direction of feed is made between the different sheet materials on either side of each valve, and the thus-obtained sealed enclosures are separated from one another, along said transverse weld lines.
EP95909081A 1994-03-03 1995-03-03 Sealed envelope, particularly tubular bag, method for the manufacture thereof, and method for filling said envelope with a beverage Expired - Lifetime EP0746507B1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
FR9402575 1994-03-03
FR9402575A FR2716865A1 (en) 1994-03-03 1994-03-03 Sealed sachet containing a drink
FR9409882 1994-08-05
FR9409882 1994-08-05
FR9413159 1994-10-28
FR9413159 1994-10-28
PCT/IB1995/000138 WO1995023742A1 (en) 1994-03-03 1995-03-03 Sealed envelope, method for the manufacture thereof, and method for filling said envelope with a beverage

Publications (2)

Publication Number Publication Date
EP0746507A1 EP0746507A1 (en) 1996-12-11
EP0746507B1 true EP0746507B1 (en) 1998-09-30

Family

ID=27252879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95909081A Expired - Lifetime EP0746507B1 (en) 1994-03-03 1995-03-03 Sealed envelope, particularly tubular bag, method for the manufacture thereof, and method for filling said envelope with a beverage

Country Status (6)

Country Link
US (1) US6481889B2 (en)
EP (1) EP0746507B1 (en)
AU (1) AU1716795A (en)
DE (1) DE69505106T2 (en)
ES (1) ES2125006T3 (en)
WO (1) WO1995023742A1 (en)

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Publication number Publication date
ES2125006T3 (en) 1999-02-16
AU1716795A (en) 1995-09-18
WO1995023742A1 (en) 1995-09-08
DE69505106D1 (en) 1998-11-05
DE69505106T2 (en) 1999-04-22
EP0746507A1 (en) 1996-12-11
US6481889B2 (en) 2002-11-19
US20020015541A1 (en) 2002-02-07

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