EP1808380A1 - Flexible pouch for a liquid and method of manufacturing thereof - Google Patents

Flexible pouch for a liquid and method of manufacturing thereof Download PDF

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Publication number
EP1808380A1
EP1808380A1 EP06405012A EP06405012A EP1808380A1 EP 1808380 A1 EP1808380 A1 EP 1808380A1 EP 06405012 A EP06405012 A EP 06405012A EP 06405012 A EP06405012 A EP 06405012A EP 1808380 A1 EP1808380 A1 EP 1808380A1
Authority
EP
European Patent Office
Prior art keywords
container
flexible
walls
liquid
welding
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.)
Withdrawn
Application number
EP06405012A
Other languages
German (de)
French (fr)
Inventor
Eric Risgalla
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.)
Pepup SA
Original Assignee
Pepup SA
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
Application filed by Pepup SA filed Critical Pepup SA
Priority to EP06405012A priority Critical patent/EP1808380A1/en
Priority to CN200680050885XA priority patent/CN101356099B/en
Priority to EP06842357A priority patent/EP1981779B1/en
Priority to AP2008004536A priority patent/AP2306A/en
Priority to US12/087,621 priority patent/US20090003737A1/en
Priority to BRPI0620964-5A priority patent/BRPI0620964A2/en
Priority to AT06842357T priority patent/ATE503700T1/en
Priority to EA200801532A priority patent/EA013390B1/en
Priority to PCT/IB2006/003924 priority patent/WO2007080450A2/en
Priority to DE602006021070T priority patent/DE602006021070D1/en
Publication of EP1808380A1 publication Critical patent/EP1808380A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • B65D75/5822—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion and defining, after tearing, a small dispensing spout, a small orifice or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
    • B65D75/44—Individual packages cut from webs or tubes
    • B65D75/48—Individual packages cut from webs or tubes containing liquids, semiliquids, or pastes, e.g. cushion-shaped packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/855—Forming valves integral with the containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]

Definitions

  • the present invention relates to a flexible container for liquid provided with a self-sealing pouring nozzle, and a method for the manufacture thereof.
  • Flexible containers for holding a beverage or other liquid have several advantages over rigid containers, including: lower manufacturing cost, minimal material usage and low volume after use.
  • the containers once opened, and in the absence of a separate rigid spout, welded or glued to the flexible sheets of the container can not be easily closed and tend to let out liquid. The user is therefore forced to hold the container once opened, since it can not be placed on a table or other surface before having emptied it completely to avoid unintentional leaks.
  • the document US 5,411,178 proposes a container in which a self-sealing effect is created by a narrowing or other obstacle close to the mouthpiece, thus developing a strong resistance to the passage of the liquid.
  • the self-sealing effect strongly depends on the dimensions of the passage as well as the characteristics of the liquid, and in particular its surface tension.
  • a self-sealing solution is proposed by WO 2004/087526 .
  • This patent describes a flexible container comprising two sheets of a flexible material, superimposed and assembled by a weld seam or bonding to define a sealed interior volume.
  • the mouthpiece of the container is outwardly projecting on an edge portion of the container and is connected to the interior volume of the container through an outlet channel.
  • the container contains one or more obstacles, formed by welding or bonding of the two walls, arranged in the interior volume near the channel leading to the mouthpiece, so as to limit the section of passage of the liquid between the interior volume and the channel of exit.
  • a surface portion comprising the tip and delimited by the obstacle and by folds oriented substantially transversely obstacles, arches and creates a valve that blocks the flow of liquid through the tip.
  • the user exerts pressure on the container in a direction substantially perpendicular to the plane of the obstruction weld, which has the effect of reducing the bending and bending and increasing the pressure of the liquid in the container, allowing the flow of liquid.
  • WO 2004/087526 is included for reference.
  • An object of the invention is therefore to provide a flexible container for self-sealing liquid that is economical and simple to manufacture.
  • a flexible container for liquid comprises two walls made of a flexible material bonded by a weld or gluing seam in order to define a sealed interior volume of said container, a pouring spout defined by said two walls having a nozzle arranged towards outside said container and an outlet channel connecting the nozzle to the interior volume of said container.
  • the flexible container of the present invention has a general diamond shape, and the spout is formed by welding or gluing in a corner with an acute angle.
  • the container comprises one or more obstacles formed by welding or gluing of the two walls and arranged in said interior volume essentially facing and close to the channel leading to the mouthpiece so as to limit the passage section of the liquid between the interior volume. and the output channel, leaving at least one narrowed passage free.
  • the inside angle of the corner with an acute angle can be between 60 ° and 85 °, preferably between 70 ° and 80 °.
  • the general shape of the diamond of the container according to the invention allows a corner of said container to act as a spout, while ensuring the function of self-sealing performance and reliable manner, without requiring cutting the walls for the formation of the spout.
  • the container according to the invention can thus be manufactured from very flexible polymer sheets commonly used for the manufacture of flexible containers, of rectangular shape and economic, without falling materials, using known methods of welding and separation of the containers. successive from sheets of continuous flexible material, in the production line.
  • the problem of cutting very flexible materials which, in view of their large plastic deformation, required precise mechanical cutting tools, or other cutting means incorporated in the non-standard production line, is especially avoided. manufacturing cost.
  • the container according to the invention can therefore be made from extruded polymer, commonly used, among others, in the food industry to contain liquid foods, for example polyethylene or polyvinyl chloride.
  • Objects of the invention are also achieved by a method of manufacturing self-sealing flexible containers according to claim 8.
  • the described method allows the simultaneous or continuous manufacture of several flexible containers for liquid.
  • These flexible containers can be made from a long sheet of flexible material.
  • the container according to the present invention has a very simple construction and manufacture, without requiring a cutting of the flexible walls around the spout to form the spout. It is therefore possible to use very flexible and economical materials for the manufacture of the container. On the other hand, it reduces the amount of material used to a minimum, which has a positive impact on the ecological balance.
  • a container 1 according to one embodiment of the invention comprises two walls of flexible material 15,16, interconnected by a weld or a bonding assembly 2 defining the periphery of the container 1.
  • the two walls of the container are advantageously formed from a sheet of flexible material folded on itself to compose the two walls. Otherwise, the two walls may be formed by two sheets of flexible material.
  • the weld bead 2 also limits a spout 3 disposed in a corner of the container with an acute angle.
  • the pouring spout is made of the same sheet of flexible material as the sheet constituting the container 1.
  • the spout comprises a nozzle 4 disposed towards the outside of the container and an outlet channel 5 opening into the flexible container 1
  • the pouring spout 3 may further comprise a rupture primer 20, making it possible to detach a portion thereof, thus opening the mouthpiece 4, respectively the channel 5.
  • the flexible material may be, for example, a polymer material, for example a plastic, such as a thermally deformable plastic, including for example polyethylene, polypropylene, polyvinyl chloride and polyester polymers or a mixture of polymers.
  • a low cost material for example a coextruded material, can be used.
  • the inside angle ⁇ of the corner of the container with an acute angle shown in Figure 2 can be between 30 ° and 98 °, preferably between 60 ° and 85 °, for example between 70 ° and 80 °, preferably about 75 °.
  • the acute angle of the container provides a pouring spout with an effective self-sealing function of a very simple construction and manufacture, without the need for cutting the flexible walls for the formation of the spout.
  • the container comprises a self-sealing tip as shown in Figures 1 to 4.
  • the two walls 15, 16, are welded or glued together inside the flexible container 1, close to the place where the channel 5 opens into the flexible container, so as to form an obstacle 6 arranged opposite the output channel.
  • the welded obstacle 6 is of elongated shape and extends between two ends which overlap the contour weld 2 on either side of the outlet channel 5, leaving two passages 8,8 'free in the direction of the channel 5. length of the overlap is relatively small compared to the total length of the contour weld 2, preferably less than 10%.
  • the elongated obstacle extends substantially parallel to the portions of the contour weld 2 on either side of the outlet channel, and approximately perpendicular to the general direction of the channel.
  • the large central part of the two walls 15 and 16 forming the container 1 differs and inflates by a not shown filling nozzle and closed permanently after filling, as seen in Figure 3 .
  • the folds 7 and 7 ', as well as the generally elongate obstacle 6, approximately along the dashed line of the nip 10 shown in FIG. 1, with the bead section 2 extending between the fold lines 7, 7' form a portion of surface that tends to curl (arch), as shown in Figure 3.
  • the bending of the area between the folds 7,7 'including the spout, has the effect of pressing the two flexible sheets in this against each other and thus to form a valve which blocks the flow of liquid through the passages 8, 8 'and through the orifice of the nozzle 4.
  • the crushing of the container in the direction F H substantially perpendicular to the weld plane of the obstacle has the effect of reducing the bending and the folds 7.7 ', while increasing the pressure of the liquid in the container which half-opens the lips flexible sheets at the entrance of passages 8,8 'to allow the flow of liquid.
  • a crushing force F H is applied approximately to side sections of the welding bead, accompanied by the increase of the pressure inside the container, a tensile force F T and a rotation torque F R act on the cord portion near the tip which tends to flatten, that is to say, to reduce the bending of the spout area, between the folds 7,7 '.
  • the general shape of the diamond of the container with the aforementioned internal angle ⁇ of the corner with acute angle makes it possible to optimize the tensile force and the torque created by crushing the container in the direction F h substantially perpendicular to the plane of the weld the obstacle 6, thus facilitating the flow of liquid through the tip 4.
  • the position of the tip in a corner with an acute angle of a rhombus shape allows the crash by the user of a part central longitudinally opposed welds of the container and to create an effective opening of the channel, allowing the easy flow of the liquid contained in the container.
  • a particular flexible package may also contain any kind of liquid, without considering here the chemical compatibility of the liquid with the material constituting the container.
  • the embodiment of the flexible container shown and described comprises an obstacle 6 defining two narrowed passages 8 and 8 '.
  • the welded obstacle 6 ' is arranged facing the endpiece as in the preceding embodiments, except that this obstacle is in two parts and is provided with of a central passage 12.
  • the central passage 12 arranged in the welded obstacle makes it possible to increase the flow of the liquid in the passage of the mouthpiece, when the user exerts pressure on the container in a direction substantially perpendicular to the plane of the obstacle weld.
  • the figures show a container 1 consisting of a single sheet of flexible material folded on itself on a straight edge.
  • the container 1 shown is provided with a weld seam along its four edges to form the interior volume of the container; it is understood that the weld along the straight edge can be omitted.
  • the container may consist of two sheets of flexible material interconnected by an assembly line in the form of gluing or welding.
  • a plurality of containers 1 can be manufactured simultaneously or continuously from a long sheet of flexible material.
  • Figure 5 shows a series of containers 1 made from a sheet of flexible material.
  • the containers are formed by folding on itself a sheet of flexible material to form the two walls 15, 16 of the containers.
  • the sheet of folded flexible material is then welded, for example by thermal welding, in order to define the border of the container around the interior volume, the pouring container with a mouthpiece and an outlet channel connecting the mouthpiece to the interior volume of the container and the obstacle.
  • the containers can be separated from each other by a simple cut, for example by thermal cutting. The welding and cutting steps can also be performed simultaneously.
  • the method described allows the simultaneous or continuous manufacture of a plurality of flexible containers for liquid, from a sheet of flexible material without creating falls of material, which facilitates the manufacture and reduces the amount of material used .
  • the manufacturing process is simple, not requiring relatively complicated or expensive cutting processes around the spout. Cutting along two straight sections of the weld seam of the outer edge of the container is very simple and can therefore be quickly performed, economically, by existing industrial packaging machines.
  • this process makes it possible, by simple manipulations of the material, to use very flexible and low-cost materials.

Abstract

The container (1) has two flexible walls connected by an assembling seal (2) that limits a spout (3) disposed in a corner with an acute angle such that the spout is constituted of same flexible material sheet that constitutes the container. The spout has a nozzle (4) disposed towards exterior of the container and an outlet channel (5) emerging from the interior of the container. The walls are welded or adhered together within the container at proximity of location where the channel emerges from the container. An independent claim is also included for a method for fabricating a flexible container for liquid.

Description

La présente invention concerne un récipient souple pour liquide muni d'un embout verseur auto-obturable, et un procédé pour la fabrication de celui-ci.The present invention relates to a flexible container for liquid provided with a self-sealing pouring nozzle, and a method for the manufacture thereof.

Les récipients souples pour contenir une boisson ou autre liquide présentent plusieurs avantages par rapport aux récipients rigides, notamment : un plus faible coût de fabrication, une utilisation minimale de matière et un faible volume après usage. Toutefois, les récipients une fois ouverts, et en l'absence d'un bec verseur rigide séparé, soudé ou collé aux feuilles souples du récipient, ne peuvent pas être facilement refermés et tendent à laisser s'échapper du liquide. L'utilisateur est donc contraint à tenir le récipient une fois ouvert, puisqu'on ne peut pas le poser sur une table ou autre surface avant de l'avoir entièrement vidé pour éviter des fuites involontaires.Flexible containers for holding a beverage or other liquid have several advantages over rigid containers, including: lower manufacturing cost, minimal material usage and low volume after use. However, the containers once opened, and in the absence of a separate rigid spout, welded or glued to the flexible sheets of the container, can not be easily closed and tend to let out liquid. The user is therefore forced to hold the container once opened, since it can not be placed on a table or other surface before having emptied it completely to avoid unintentional leaks.

Divers récipients souples à embout auto-obturable ont été proposés afin de répondre à ce problème. Par exemple, les brevets GB 769810 et US 4,988,016 , proposent un embout auto-obturable dans lequel une résistance au passage du liquide est créée, en munissant les récipients de longs canaux minces communiquant avec l'embout, développant ainsi une forte résistance à l'écoulement. Dans ces systèmes, l'effet d'auto-obturation dépend essentiellement des caractéristiques d'élasticité du matériau constituant le récipient, des dimensions de l'embout ainsi que des caractéristiques du liquide.Various flexible containers with self-sealing tips have been proposed to address this problem. For example, patents GB 769810 and US 4,988,016 , propose a self-sealing tip in which resistance to the passage of the liquid is created, providing the containers with long thin channels communicating with the tip, thereby developing a high resistance to flow. In these systems, the self-sealing effect essentially depends on the elasticity characteristics of the material constituting the container, the dimensions of the nozzle as well as the characteristics of the liquid.

Autrement, le document US 5,411,178 , propose un récipient dans lequel un effet auto-obturation est créé par un rétrécissement ou autre obstacle proche de l'embout, ainsi développant une forte résistance au passage du liquide. Dans les systèmes dépendant d'une forte résistance locale, tels que décrits dans le brevet US 5,411,178 , l'effet d'auto-obturation dépend fortement des dimensions du passage ainsi que des caractéristiques du liquide, et notamment de sa tension de surface.Otherwise, the document US 5,411,178 , proposes a container in which a self-sealing effect is created by a narrowing or other obstacle close to the mouthpiece, thus developing a strong resistance to the passage of the liquid. In systems depending on a strong local resistance, as described in the patent US 5,411,178 , the self-sealing effect strongly depends on the dimensions of the passage as well as the characteristics of the liquid, and in particular its surface tension.

Dans toutes ces solutions antérieures, afin d'obtenir un effet d'auto-obturation fiable, il est nécessaire d'avoir une grande résistance dans le canal de sortie qui limite fortement le débit d'écoulement et demande à l'utilisateur d'exercer une forte pression d'écrasement afin que le récipient se vide. De surcroît, après une première utilisation d'un récipient, l'effet d'auto-obturation a tendance à se relâcher, entraînant des fuites involontaires. Un autre désavantage est que dans ces systèmes, une géométrie d'embout donnée n'est souvent utilisable que pour un liquide spécifique, puisque l'effet d'auto-obturation est sensible aux variations des dimensions du canal ou du rétrécissement.In all these previous solutions, in order to obtain a reliable self-sealing effect, it is necessary to have a high resistance in the output channel which strongly limits the flow rate and requires the user to exercise a strong crushing pressure so that the container empties. In addition, after a first use of a container, the self-sealing effect tends to loosen, causing involuntary leaks. Another disadvantage is that in these systems, a given tip geometry is often only usable for a specific liquid, since the self-sealing effect is sensitive to changes in channel size or shrinkage.

D'autres solutions d'obturation connues reposent sur la création de plis après utilisation du récipient, telles que décrites dans les brevets américains US 3,278,085 , US 5,228,782 et US 6,244,468 . Ces solutions ont le désavantage de ne pas être auto-obturables et nécessitent des opérations par l'utilisateur.Other known sealing solutions rely on the creation of folds after use of the container, as described in US patents. US 3,278,085 , US5,228,782 and US 6,244,468 . These solutions have the disadvantage of not being self-sealing and require operations by the user.

Une solution d'auto-obturation est proposée par WO 2004/087526 . Ce brevet décrit un récipient souple comprenant deux feuilles en un matériau souple, superposées et assemblées par un cordon de soudure ou de collage afin de définir un volume intérieur étanche. L'embout du récipient est disposé en saillie vers l'extérieur sur une portion de bordure du récipient et est relié au volume intérieur du récipient par un canal de sortie. Le récipient contient un ou plusieurs obstacles, formés par soudure ou collage des deux parois, aménagés dans le volume intérieur à proximité du canal conduisant à l'embout, de manière à limiter la section de passage du liquide entre le volume intérieur et le canal de sortie. Quand le récipient est rempli avec un liquide, une portion de surface comprenant l'embout et délimitée par l'obstacle et par des plis orientés essentiellement transversalement des obstacles, se cambre et crée une valve qui bloque l'écoulement du liquide à travers l'embout. Afin de permettre l'écoulement de liquide, l'utilisateur exerce de la pression sur le récipient dans une direction essentiellement perpendiculaire au plan de la soudure d'obstacle, ce qui a comme effet de réduire le cambrage et les plis et d'augmenter la pression du liquide dans le récipient, permettant l'écoulement du liquide. WO 2004/087526 est inclus pour référence.A self-sealing solution is proposed by WO 2004/087526 . This patent describes a flexible container comprising two sheets of a flexible material, superimposed and assembled by a weld seam or bonding to define a sealed interior volume. The mouthpiece of the container is outwardly projecting on an edge portion of the container and is connected to the interior volume of the container through an outlet channel. The container contains one or more obstacles, formed by welding or bonding of the two walls, arranged in the interior volume near the channel leading to the mouthpiece, so as to limit the section of passage of the liquid between the interior volume and the channel of exit. When the container is filled with a liquid, a surface portion comprising the tip and delimited by the obstacle and by folds oriented substantially transversely obstacles, arches and creates a valve that blocks the flow of liquid through the tip. In order to allow the flow of liquid, the user exerts pressure on the container in a direction substantially perpendicular to the plane of the obstruction weld, which has the effect of reducing the bending and bending and increasing the pressure of the liquid in the container, allowing the flow of liquid. WO 2004/087526 is included for reference.

Afin de répondre au besoin des marchés émergents, il existe une demande pour des récipients souples auto-obturables pratique et économe, fabriqués à partir d'un matériau peu coûteux et couramment disponible.In order to meet the needs of emerging markets, there is a demand for practical and economical self-sealing flexible containers made from inexpensive and commonly available material.

Un but de l'invention est donc de réaliser un récipient souple pour liquide auto-obturable économe et simple à fabriquer.An object of the invention is therefore to provide a flexible container for self-sealing liquid that is economical and simple to manufacture.

Il est avantageux de réaliser un récipient auto-obturable qui peut être fabriqué à partir d'un matériau très souple, et de faible coût.It is advantageous to make a self-sealing container that can be made from a very flexible material, and low cost.

Il est avantageux de réaliser un récipient auto-obturable selon un procédé respectueux de l'environnement.It is advantageous to make a self-sealing container according to an environmentally friendly process.

Des buts de l'invention sont atteints par un récipient souple selon la revendication 1.Objects of the invention are achieved by a flexible container according to claim 1.

Dans la présente invention, un récipient souple pour liquide comprend deux parois en un matériau souple liées par un cordon de soudure ou de collage afin de définir un volume intérieur étanche dudit récipient, un bec verseur défini par les deux dites parois ayant un embout disposé vers l'extérieur dudit récipient et un canal de sortie reliant l'embout au volume intérieur dudit récipient. Le récipient souple de la présente invention a une forme générale de losange, et le bec verseur est formé par soudage ou collage dans un coin avec un angle aigu.In the present invention, a flexible container for liquid comprises two walls made of a flexible material bonded by a weld or gluing seam in order to define a sealed interior volume of said container, a pouring spout defined by said two walls having a nozzle arranged towards outside said container and an outlet channel connecting the nozzle to the interior volume of said container. The flexible container of the present invention has a general diamond shape, and the spout is formed by welding or gluing in a corner with an acute angle.

Avantageusement, le récipient comprend un ou plusieurs obstacles formés par soudure ou collage des deux parois et aménagés dans ledit volume intérieur essentiellement en regard et à proximité du canal conduisant à l'embout de manière à limiter la section de passage du liquide entre le volume intérieur et le canal de sortie, en laissant libre au moins un passage rétréci.Advantageously, the container comprises one or more obstacles formed by welding or gluing of the two walls and arranged in said interior volume essentially facing and close to the channel leading to the mouthpiece so as to limit the passage section of the liquid between the interior volume. and the output channel, leaving at least one narrowed passage free.

L'angle intérieur du coin avec un angle aigu peut être entre 60° et 85°, de préférence entre 70° et 80°.The inside angle of the corner with an acute angle can be between 60 ° and 85 °, preferably between 70 ° and 80 °.

Avantageusement, la forme générale de losange du récipient selon l'invention permet à un coin dudit récipient de faire office du bec verseur, tout en assurant la fonction d'auto-obturation de manière performante et fiable, ceci sans nécessiter de découpe des parois pour la formation du bec verseur. Le récipient selon l'invention peut ainsi être fabriqué à partir de feuilles de polymère très souples couramment utilisées pour la fabrication de récipients souples, de forme rectangulaire et économiques, sans chute de matériaux, en utilisant des procédés connus de soudage et de séparation des récipients successives à partir de feuilles de matériau souple continu, dans la chaîne de production. On évite surtout les problèmes liés à la découpe de matériaux très souples qui, au vu de leur importante déformation plastique, nécessitaient des outils de découpe mécaniques précis, ou d'autres moyens de découpe incorporés dans la ligne de production non standard, augmentant ainsi le coût de fabrication.Advantageously, the general shape of the diamond of the container according to the invention allows a corner of said container to act as a spout, while ensuring the function of self-sealing performance and reliable manner, without requiring cutting the walls for the formation of the spout. The container according to the invention can thus be manufactured from very flexible polymer sheets commonly used for the manufacture of flexible containers, of rectangular shape and economic, without falling materials, using known methods of welding and separation of the containers. successive from sheets of continuous flexible material, in the production line. In particular, the problem of cutting very flexible materials which, in view of their large plastic deformation, required precise mechanical cutting tools, or other cutting means incorporated in the non-standard production line, is especially avoided. manufacturing cost.

Le récipient selon l'invention peut donc être fabriqué à partir de polymère extrudé, couramment utilisé, entre autres, dans le domaine alimentaire pour contenir des aliments liquides, par exemple en polyéthylène ou polychlorure de vinyle.The container according to the invention can therefore be made from extruded polymer, commonly used, among others, in the food industry to contain liquid foods, for example polyethylene or polyvinyl chloride.

Des buts de l'invention sont également atteints par un procédé de fabrication de récipients souples auto-obturables selon la revendication 8.Objects of the invention are also achieved by a method of manufacturing self-sealing flexible containers according to claim 8.

Dans la présente invention, un procédé pour la fabrication d'un récipient souple auto-obturable pour liquides comprend les caractéristiques suivantes:

  1. (i) superposition de deux feuilles de matériau souple ou pliage sur elle-même d'une feuille de matériau souple afin de former deux parois dudit récipient,
  2. (ii) soudage des deux parois afin de former un cordon de soudure définissant une bordure extérieure du récipient dans une forme générale de losange,
  3. (iii) soudage du contour d'un bec verseur disposé dans un coin du récipient avec un angle aigu, le bec verseur ayant un embout disposé vers l'extérieur dudit récipient, et un canal de sortie reliant l'embout au volume intérieur dudit récipient, et
  4. (iv) soudage d'un ou plusieurs obstacles positionnés dans ledit volume intérieur essentiellement en regard et à proximité du canal conduisant à l'embout, de manière à limiter la section de passage du liquide entre le volume intérieur et le canal de sortie en laissant libre au moins un passage rétréci.
In the present invention, a method for manufacturing a self-sealing flexible container for liquids includes the following features:
  1. (i) superimposing two sheets of flexible material or folding on itself a sheet of flexible material to form two walls of said container,
  2. (ii) welding the two walls to form a weld bead defining an outer edge of the container in a general diamond shape,
  3. (iii) welding the outline of a spout disposed in a corner of the container with an acute angle, the spout having a tip disposed outwardly of said container, and an outlet channel connecting the nozzle to the interior volume of said container , and
  4. (iv) welding one or more obstacles positioned in said interior volume substantially facing and near the channel leading to the mouthpiece, so as to limit the passage section of the liquid between the interior volume and the outlet channel leaving free at least one narrowed passage.

Avantageusement, le procédé décrit permet la fabrication simultanée ou continue de plusieurs récipients souples pour liquide. Ces récipients souples peuvent être fabriqués à partir d'une longue feuille de matériau souple. 'Advantageously, the described method allows the simultaneous or continuous manufacture of several flexible containers for liquid. These flexible containers can be made from a long sheet of flexible material. '

Le récipient selon la présente invention a une construction et une fabrication très simples, sans nécessiter une découpe des parois souples autour du bec verseur pour former le bec verseur. On peut donc utiliser des matériaux très souples et économes pour la fabrication du récipient. D'autre part, on réduit la quantité de matériau utilisé à un minimum, ce qui a un impact positif sur le bilan écologique.The container according to the present invention has a very simple construction and manufacture, without requiring a cutting of the flexible walls around the spout to form the spout. It is therefore possible to use very flexible and economical materials for the manufacture of the container. On the other hand, it reduces the amount of material used to a minimum, which has a positive impact on the ecological balance.

D'autres buts et aspects avantageux de l'invention ressortiront des revendications et de la description, ainsi que des dessins annexés, dans lesquels :

  • la figure 1 est une vue plane d'un récipient selon l'invention;
  • la figure 2 est une vue plane d'une partie d'un récipient de la figure précédente;
  • la figure 3 est une vue en perspective du récipient de la figure précédente ;
  • la figure 4 est une vue plane d'un récipient selon une deuxième forme d'exécution de l'invention; et
  • la figure 5 est une vue plane d'une série de récipients fabriqués d'une feuille de matériau souple, selon l'invention.
Other objects and advantageous aspects of the invention will emerge from the claims and the description, as well as the appended drawings, in which:
  • Figure 1 is a plan view of a container according to the invention;
  • Figure 2 is a plan view of a portion of a container of the preceding figure;
  • Figure 3 is a perspective view of the container of the previous figure;
  • Figure 4 is a plan view of a container according to a second embodiment of the invention; and
  • Figure 5 is a plan view of a series of containers made of a sheet of flexible material, according to the invention.

Faisant référence à la figure 1, un récipient 1 selon une forme d'exécution de l'invention comprend deux parois en matériau souple 15,16, reliées entre elles par une soudure ou un assemblage par collage 2 définissant le pourtour du récipient 1. Les deux parois du récipient sont avantageusement formées à partir d'une feuille de matériau souple repliée sur elle-même afin de composer les deux parois. Autrement, les deux parois peuvent être formées par deux feuilles de matériau souple.Referring to Figure 1, a container 1 according to one embodiment of the invention comprises two walls of flexible material 15,16, interconnected by a weld or a bonding assembly 2 defining the periphery of the container 1. The two walls of the container are advantageously formed from a sheet of flexible material folded on itself to compose the two walls. Otherwise, the two walls may be formed by two sheets of flexible material.

Le cordon d'assemblage 2 sous forme de soudure limite aussi un bec verseur 3 disposé dans un coin du récipient avec un angle aigu. Ainsi le bec verseur est constitué de la même feuille en matériau souple que la feuille constituant le récipient 1. Le bec verseur comprend un embout 4 disposé vers l'extérieur du récipient et un canal de sortie 5 débouchant à l'intérieur du récipient souple 1. Le bec verseur 3 peut en outre comprendre une amorce de rupture 20, permettant d'en détacher une portion, ouvrant ainsi l'embout 4, respectivement le canal 5.The weld bead 2 also limits a spout 3 disposed in a corner of the container with an acute angle. Thus the pouring spout is made of the same sheet of flexible material as the sheet constituting the container 1. The spout comprises a nozzle 4 disposed towards the outside of the container and an outlet channel 5 opening into the flexible container 1 The pouring spout 3 may further comprise a rupture primer 20, making it possible to detach a portion thereof, thus opening the mouthpiece 4, respectively the channel 5.

Le matériau souple peut être, par exemple, un matériau en polymère, par exemple un plastique, tel qu'un plastique thermodéformable, incluant par exemple polyéthylène, polypropylène, polychlorure de vinyle et des polymères polyester ou un mélange de polymères. Avantageusement, un matériau à faible coût, par exemple un matériau co-extrudé, peut être utilisé.The flexible material may be, for example, a polymer material, for example a plastic, such as a thermally deformable plastic, including for example polyethylene, polypropylene, polyvinyl chloride and polyester polymers or a mixture of polymers. Advantageously, a low cost material, for example a coextruded material, can be used.

L'angle intérieur α du coin du récipient avec un angle aigu montré dans la figure 2, peut être entre 30° et 98°, avantageusement entre 60° et 85°, par exemple entre 70° et 80°, avantageusement environ 75°. L'angle aigu du récipient permet d'obtenir un bec verseur avec une fonction auto-obturable efficace d'une construction et d'une fabrication très simples, sans nécessiter une découpe des parois souples pour la formation du bec verseur.The inside angle α of the corner of the container with an acute angle shown in Figure 2, can be between 30 ° and 98 °, preferably between 60 ° and 85 °, for example between 70 ° and 80 °, preferably about 75 °. The acute angle of the container provides a pouring spout with an effective self-sealing function of a very simple construction and manufacture, without the need for cutting the flexible walls for the formation of the spout.

Dans une forme d'exécution préférée de l'invention, le récipient comprend un embout auto-obturable tel que représenté dans les figures 1 à 4.In a preferred embodiment of the invention, the container comprises a self-sealing tip as shown in Figures 1 to 4.

Avantageusement, les deux parois 15,16, sont soudées ou collées ensemble à l'intérieur du récipient souple 1, à proximité de l'endroit où le canal 5 débouche dans le récipient souple, de manière à former un obstacle 6 disposé en regard du canal de sortie. L'obstacle soudé 6 est de forme longiligne et s'étend entre deux extrémités qui chevauchent la soudure de contour 2 de part et d'autre du canal de sortie 5, laissant libres deux passages 8,8' en direction du canal 5. La longueur du chevauchement est relativement petite par rapport à la longueur totale de la soudure de contour 2, de préférence inférieure à 10%. De préférence, l'obstacle longiligne s'étend essentiellement parallèlement aux parties de la soudure de contour 2 de part et d'autre du canal de sortie, et approximativement perpendiculairement à la direction générale du canal.Advantageously, the two walls 15, 16, are welded or glued together inside the flexible container 1, close to the place where the channel 5 opens into the flexible container, so as to form an obstacle 6 arranged opposite the output channel. The welded obstacle 6 is of elongated shape and extends between two ends which overlap the contour weld 2 on either side of the outlet channel 5, leaving two passages 8,8 'free in the direction of the channel 5. length of the overlap is relatively small compared to the total length of the contour weld 2, preferably less than 10%. Preferably, the elongated obstacle extends substantially parallel to the portions of the contour weld 2 on either side of the outlet channel, and approximately perpendicular to the general direction of the channel.

Lors du remplissage du récipient 1, la grande partie centrale des deux parois 15 et 16 formant le récipient 1 s'écarte et se gonfle par un embout de remplissage non représenté et obturé de manière permanente après remplissage, comme on le voit dans la figure 3.When filling the container 1, the large central part of the two walls 15 and 16 forming the container 1 differs and inflates by a not shown filling nozzle and closed permanently after filling, as seen in Figure 3 .

Lors du remplissage du récipient 1, respectivement lors du gonflage des parois 15 et 16, il se crée sur chacune des parois deux plis en travers des passages rétrécis 8 et 8', approximativement selon les axes 8' représentés sur la figure 1. La déformation des parois 15 et 16 à proximité des extrémités de l'obstacle 6, respectivement des deux portions proches de chaque paroi 15 et 16, de part et d'autre des passages rétrécis 8 et 8', crée un pli, approximativement selon les axes 7 et 7'.When filling the container 1, respectively during the inflation of the walls 15 and 16, two folds are created on each of the walls across the narrowed passages 8 and 8 ', approximately along the axes 8' shown in FIG. walls 15 and 16 near the ends of the obstacle 6, respectively of the two portions near each wall 15 and 16, on both sides of the narrowed passages 8 and 8 ', creates a fold, approximately along the axes 7 and 7'.

Les plis 7 et 7', ainsi que l'obstacle généralement longiligne 6, suivant approximativement la ligne pointillée du pincement 10 montrée dans la figure 1, avec la section de cordon 2 s'étendant entre les lignes de pli 7,7' forment une portion de surface qui a tendance à s'incurver (cambrer), tel que montré dans la figure 3. Le cambrage de la zone entre les plis 7,7' comprenant le bec verseur, a comme effet de plaquer les deux feuilles souples dans cette zone l'une contre l'autre et ainsi de former une valve qui bloque l'écoulement du liquide à travers les passages 8, 8' et à travers l'orifice de l'embout 4.The folds 7 and 7 ', as well as the generally elongate obstacle 6, approximately along the dashed line of the nip 10 shown in FIG. 1, with the bead section 2 extending between the fold lines 7, 7' form a portion of surface that tends to curl (arch), as shown in Figure 3. The bending of the area between the folds 7,7 'including the spout, has the effect of pressing the two flexible sheets in this against each other and thus to form a valve which blocks the flow of liquid through the passages 8, 8 'and through the orifice of the nozzle 4.

Quand le récipient souple est posé sur une surface plane, tel que montré dans la figure 3, et qu'une force verticale Fv est appliquée approximativement sur la grande partie centrale de la paroi supérieure 15, les plis 7,7' et l'effet de cambrage de la zone entre les plis 7,7' comprenant le bec verseur ont tendance à devenir plus prononcés, augmentant ainsi l'efficacité de l'action de la valve.When the flexible container is placed on a flat surface, as shown in FIG. 3, and a vertical force F v is applied approximately to the large central part of the upper wall 15, the folds 7, 7 'and the bending effect of the area between the folds 7,7 'including the spout tend to become more pronounced, thus increasing the effectiveness of the action of the valve.

L'accentuation des plis 7,7' à proximité des passages 8,8' ainsi que l'augmentation du cambrage de la zone entre les plis 7,7' avec l'application d'une force Fv essentiellement perpendiculaire au plan des parois souples, empêchent efficacement des fuites du liquide lorsque le récipient souple est posé dans sa position naturelle sur une surface essentiellement plane, et même lorsqu'un autre objet augmentant la pression dans les récipients est posé sur le dessus du récipient.The accentuation of the folds 7, 7 'near the passages 8, 8' as well as the increase of the bending of the zone between the folds 7, 7 'with the application of a force F v essentially perpendicular to the plane of the walls flexible, effectively prevent leakage of the liquid when the flexible container is placed in its natural position on a substantially flat surface, and even when another object increasing the pressure in the containers is placed on the top of the container.

Afin de permettre l'écoulement de liquide par l'embout 4, il suffit que l'utilisateur exerce une certaine pression sur le récipient, notamment en écrasant le récipient au moins en partie dans une direction Fh essentiellement perpendiculaire au plan de la soudure d'obstacle 6, entrouvrant ainsi les lèvres obturant le ou les passages rétrécis 8,8'. Le relâchement de cette action de pression referme les passages rétrécis et referme le récipient.In order to allow the flow of liquid through the nozzle 4, it suffices that the user exerts a certain pressure on the container, in particular by crushing the container at least partly in a direction F h substantially perpendicular to the plane of the weld. obstacle 6, thus opening the lips closing the shroud or passages 8,8 '. The release of this pressure action closes the narrowed passages and closes the container.

L'écrasement du récipient dans la direction FH essentiellement perpendiculaire au plan de soudure de l'obstacle a comme effet de réduire le cambrage et les plis 7,7', en même temps augmentant la pression du liquide dans le récipient qui entrouvre les lèvres des feuilles souples à l'entrée des passages 8,8' pour permettre l'écoulement du liquide. En effet, quand une force d'écrasement FH est appliquée approximativement sur des sections latérales du cordon de soudage, accompagnée de l'augmentation de la pression à l'intérieur du récipient, une force de traction FT et un couple de rotation FR agissent sur la partie de cordon à proximité de l'embout qui tend à s'aplatir, c'est-à-dire à réduire le cambrage de la zone du bec verseur, entre les plis 7,7'.The crushing of the container in the direction F H substantially perpendicular to the weld plane of the obstacle has the effect of reducing the bending and the folds 7.7 ', while increasing the pressure of the liquid in the container which half-opens the lips flexible sheets at the entrance of passages 8,8 'to allow the flow of liquid. Indeed, when a crushing force F H is applied approximately to side sections of the welding bead, accompanied by the increase of the pressure inside the container, a tensile force F T and a rotation torque F R act on the cord portion near the tip which tends to flatten, that is to say, to reduce the bending of the spout area, between the folds 7,7 '.

La forme générale de losange du récipient avec l'angle interne α susmentionné du coin avec angle aigu permet d'optimiser la force de traction et le couple de rotation créée par un écrasement du récipient dans la direction Fh essentiellement perpendiculaire au plan de la soudure de l'obstacle 6, ainsi facilitant l'écoulement du liquide par l'embout 4. La position de l'embout dans un coin avec un angle aigu d'une forme losange permet donc l'écrasement par l'utilisateur d'une partie centrale des soudures longitudinalement opposées du récipient et de créer une ouverture efficace du canal, permettant l'écoulement facile du liquide contenu dans le récipient.The general shape of the diamond of the container with the aforementioned internal angle α of the corner with acute angle makes it possible to optimize the tensile force and the torque created by crushing the container in the direction F h substantially perpendicular to the plane of the weld the obstacle 6, thus facilitating the flow of liquid through the tip 4. The position of the tip in a corner with an acute angle of a rhombus shape allows the crash by the user of a part central longitudinally opposed welds of the container and to create an effective opening of the channel, allowing the easy flow of the liquid contained in the container.

Du fait que les passages rétrécis 7,7' ont une longueur très faible et une géométrie très simple, le fonctionnement de l'obturation dépend moins des propriétés du liquide et de l'élasticité du matériau constituant l'emballage que dans d'autres types de récipients souples. Un emballage souple déterminé peut aussi contenir n'importe quelle sorte de liquide, sans considérer ici la compatibilité chimique du liquide avec le matériau constituant le récipient.Because the narrowed passages 7, 7 'have a very small length and a very simple geometry, the operation of the closure depends less on the properties of the liquid and the elasticity of the material constituting the package than in other types. flexible containers. A particular flexible package may also contain any kind of liquid, without considering here the chemical compatibility of the liquid with the material constituting the container.

La forme d'exécution du récipient souple représentée et décrite comprend un obstacle 6 définissant deux passages rétrécis 8 et 8'. On pourrait tout aussi bien prévoir un contact entre une extrémité de l'obstacle et la portion la plus proche de la soudure 2, ne laissant donc qu'un seul passage rétréci, un seul pli étant donc formé sur les parois 15 et 16 lors du remplissage du récipient.The embodiment of the flexible container shown and described comprises an obstacle 6 defining two narrowed passages 8 and 8 '. One could just as easily provide a contact between one end of the obstacle and the nearest portion of the weld 2, thus leaving only one narrowed passage, one only fold being formed on the walls 15 and 16 when filling the container.

Dans une autre forme d'exécution, telle que montrée dans la figure 4, l'obstacle soudé 6' est disposé en regard de l'embout comme dans les formes d'exécution précédentes, sauf que cet obstacle est en deux parties et est muni d'un passage central 12. Dans cette forme de exécution, le passage central 12 aménagé dans l'obstacle soudé permet d'augmenter l'écoulement du liquide dans le passage de l'embout, lorsque l'utilisateur exerce de la pression sur le récipient dans une direction essentiellement perpendiculaire au plan de la soudure d'obstacle.In another embodiment, as shown in FIG. 4, the welded obstacle 6 'is arranged facing the endpiece as in the preceding embodiments, except that this obstacle is in two parts and is provided with of a central passage 12. In this embodiment, the central passage 12 arranged in the welded obstacle makes it possible to increase the flow of the liquid in the passage of the mouthpiece, when the user exerts pressure on the container in a direction substantially perpendicular to the plane of the obstacle weld.

Les figures montrent un récipient 1 constitué d'une seule feuille en matériau souple replié sur elle-même sur une arête rectiligne. Le récipient 1 représenté est muni d'un cordon de soudure le long de ses quatre bords pour former le volume intérieur du récipient ; il est bien entendu que la soudure le long de l'arrête rectiligne peut être omise. Autrement, le récipient peut être constitué de deux feuilles en matériau souple reliées entre elles par un cordon d'assemblage sous forme de collage ou soudage.The figures show a container 1 consisting of a single sheet of flexible material folded on itself on a straight edge. The container 1 shown is provided with a weld seam along its four edges to form the interior volume of the container; it is understood that the weld along the straight edge can be omitted. Otherwise, the container may consist of two sheets of flexible material interconnected by an assembly line in the form of gluing or welding.

Avantageusement, une pluralité de récipients 1 peuvent être fabriqués de façon simultanée ou continue à partir d'une longue feuille en matériau souple. La figure 5 montre une série de récipients 1 fabriqués à partir d'une feuille de matériau souple. Selon la forme de l'invention représentée dans la figure 1, les récipients sont formés par pliage sur elle-même d'une feuille de matériau souple afin de former les deux parois 15, 16 des récipients. La feuille de matériau souple pliée est ensuite soudée, par exemple par un soudage thermique, afin de définir la bordure du récipient autour du volume intérieur, le bac verseur avec un embout et un canal de sortie reliant l'embout au volume intérieur du récipient et l'obstacle. Les récipients peuvent être séparés les uns des autres par une simple découpe, par exemple par découpe thermique. Les étapes de soudage et découpe peuvent également être effectuées simultanément.Advantageously, a plurality of containers 1 can be manufactured simultaneously or continuously from a long sheet of flexible material. Figure 5 shows a series of containers 1 made from a sheet of flexible material. According to the form of the invention shown in Figure 1, the containers are formed by folding on itself a sheet of flexible material to form the two walls 15, 16 of the containers. The sheet of folded flexible material is then welded, for example by thermal welding, in order to define the border of the container around the interior volume, the pouring container with a mouthpiece and an outlet channel connecting the mouthpiece to the interior volume of the container and the obstacle. The containers can be separated from each other by a simple cut, for example by thermal cutting. The welding and cutting steps can also be performed simultaneously.

Avantageusement, le procédé décrit permet la fabrication simultanée ou continue d'une pluralité de récipients souples pour liquide, à partir d'une feuille de matériau souple sans créer de chutes de matériau, ce qui en facilite la fabrication et réduit la quantité de matériau utilisé.Advantageously, the method described allows the simultaneous or continuous manufacture of a plurality of flexible containers for liquid, from a sheet of flexible material without creating falls of material, which facilitates the manufacture and reduces the amount of material used .

Le procédé de fabrication est simple, ne nécessitant pas de procédés relativement compliqués ou chers de découpe autour du bec verseur. La découpe le long de deux sections rectilignes du cordon de soudure de la bordure extérieure du récipient est très simple et peut donc être rapidement exécutée, de manière économique, par des machines de conditionnement industrielles existantes. Avantageusement, ce procédé permet, par des manipulations simples du matériau, l'utilisation de matériaux très souples et à faible coût.The manufacturing process is simple, not requiring relatively complicated or expensive cutting processes around the spout. Cutting along two straight sections of the weld seam of the outer edge of the container is very simple and can therefore be quickly performed, economically, by existing industrial packaging machines. Advantageously, this process makes it possible, by simple manipulations of the material, to use very flexible and low-cost materials.

Claims (10)

Récipient souple pour liquide, comprenant deux parois en un matériau souple, les bordures libres superposées desdites parois étant liées par un cordon de soudure ou de collage afin de définir un volume intérieur étanche dudit récipient, un bec verseur défini par lesdites parois ayant un embout disposé vers l'extérieur dudit récipient et un canal de sortie reliant l'embout au volume intérieur dudit récipient, et un ou plusieurs obstacles formés par soudure ou collage des deux parois et aménagés dans ledit volume intérieur essentiellement en regard et à proximité du canal conduisant à l'embout de manière à limiter la section de passage du liquide entre le volume intérieur et le canal de sortie en laissant libre au moins un passage rétréci, caractérisé en ce que ledit récipient souple a une forme générale de losange, et le bec verseur est formé par soudage ou collage dans un coin dudit récipient avec un angle aigu.Flexible container for liquid, comprising two walls of a flexible material, the free edges superimposed of said walls being connected by a weld or gluing bead to define a sealed interior volume of said container, a pouring spout defined by said walls having a nozzle arranged outwardly of said container and an outlet channel connecting the nozzle to the interior volume of said container, and one or more obstacles formed by welding or bonding of the two walls and arranged in said interior volume substantially facing and near the channel leading to the nozzle so as to limit the passage section of the liquid between the inner volume and the outlet channel leaving at least one narrowed passage free, characterized in that said flexible container has a general diamond shape, and the spout is formed by welding or gluing in a corner of said container with an acute angle. Récipient souple selon la revendication 1, caractérisé en ce qu'il est constitué à partir d'une feuille de matériau souple repliée sur elle-même afin de composer les dites parois.Flexible container according to claim 1, characterized in that it consists of a sheet of flexible material folded on itself in order to compose said walls. Récipient souple selon la revendication 1 ou 2, caractérisé en ce que le matériau souple est un matériau polymérique.Flexible container according to claim 1 or 2, characterized in that the flexible material is a polymeric material. Récipient souple selon la revendication 3, caractérisé en ce que le matériau polymérique est un plastique formé par extrusion.Flexible container according to claim 3, characterized in that the polymeric material is a plastic formed by extrusion. Récipient souple selon l'une des revendications 2 à 4, caractérisé en ce qu'il est formé dans une série juxtaposée de plusieurs récipients par soudage et découpe thermique d'une feuille de matériau souple.Flexible container according to one of claims 2 to 4, characterized in that it is formed in a juxtaposed series of several containers by welding and thermal cutting of a sheet of flexible material. Récipient souple selon l'une des revendications précédentes, caractérisé en ce que l'angle intérieur du coin avec un angle aigu est entre 60° et 85°.Flexible container according to one of the preceding claims, characterized in that the inner angle of the corner with an acute angle is between 60 ° and 85 °. Récipient souple selon la revendication 6, caractérisé en ce que l'angle intérieur du coin avec un angle aigu est entre 70° et 80°.Flexible container according to claim 6, characterized in that the inner angle of the corner with an acute angle is between 70 ° and 80 °. Procédé pour la fabrication d'un récipient souple pour liquide, comprenant: (i) Superposition de deux feuilles de matériau souple ou pliage sur elle-même d'une feuille de matériau souple afin de former deux parois dudit récipient, (ii) soudage des deux parois pour former un cordon de soudure définissant une bordure extérieure du récipient dans une forme générale de losange, (iii) soudage d'un bec verseur disposé dans un coin du récipient avec un angle aigu ayant un embout disposé vers l'extérieur dudit récipient, et un canal de sortie reliant l'embout au volume intérieur dudit récipient, et (iv) soudage d'un ou plusieurs obstacles positionnés dans ledit volume intérieur essentiellement en regard et à proximité du canal conduisant à l'embout, de manière à limiter la section de passage du liquide entre le volume intérieur et le canal de sortie en laissant libre au moins un passage rétréci. A process for the manufacture of a flexible container for liquid, comprising: (i) superimposing two sheets of flexible material or folding on itself a sheet of flexible material to form two walls of said container, (ii) welding the two walls to form a weld bead defining an outer edge of the container in a general diamond shape, (iii) welding a spout disposed in a corner of the container with an acute angle having a tip disposed outwardly of said container, and an outlet channel connecting the tip to the interior volume of said container, and (iv) welding one or more obstacles positioned in said interior volume substantially facing and near the channel leading to the mouthpiece, so as to limit the passage section of the liquid between the interior volume and the outlet channel leaving free at least one narrowed passage. Procédé selon la revendication 8, dans lequel plusieurs récipients sont fabriqués d'une seule feuille de manière juxtaposée, tous les récipients étant séparés les uns des autres par découpe thermique.A method according to claim 8, wherein a plurality of containers are made from a single sheet in a juxtaposed manner, all the containers being separated from one another by thermal cutting. Procédé selon la revendication 9, dans lequel les étapes de soudage et de découpe sont effectuées simultanément.The method of claim 9, wherein the welding and cutting steps are performed simultaneously.
EP06405012A 2006-01-13 2006-01-13 Flexible pouch for a liquid and method of manufacturing thereof Withdrawn EP1808380A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP06405012A EP1808380A1 (en) 2006-01-13 2006-01-13 Flexible pouch for a liquid and method of manufacturing thereof
CN200680050885XA CN101356099B (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof
EP06842357A EP1981779B1 (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof
AP2008004536A AP2306A (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof.
US12/087,621 US20090003737A1 (en) 2006-01-13 2006-12-15 Flexible Receptacle for Liquids and Method of Manufacturing Thereof
BRPI0620964-5A BRPI0620964A2 (en) 2006-01-13 2006-12-15 flexible receptacle for liquids, and, process for the manufacture of same
AT06842357T ATE503700T1 (en) 2006-01-13 2006-12-15 FLEXIBLE CONTAINER FOR LIQUIDS AND PRODUCTION PROCESS THEREOF
EA200801532A EA013390B1 (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof
PCT/IB2006/003924 WO2007080450A2 (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof
DE602006021070T DE602006021070D1 (en) 2006-01-13 2006-12-15 FLEXIBLE CONTAINER FOR LIQUIDS AND MANUFACTURING METHOD THEREFOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06405012A EP1808380A1 (en) 2006-01-13 2006-01-13 Flexible pouch for a liquid and method of manufacturing thereof

Publications (1)

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EP1808380A1 true EP1808380A1 (en) 2007-07-18

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EP06405012A Withdrawn EP1808380A1 (en) 2006-01-13 2006-01-13 Flexible pouch for a liquid and method of manufacturing thereof
EP06842357A Not-in-force EP1981779B1 (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof

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EP06842357A Not-in-force EP1981779B1 (en) 2006-01-13 2006-12-15 Flexible receptacle for liquids and method of manufacturing thereof

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US (1) US20090003737A1 (en)
EP (2) EP1808380A1 (en)
CN (1) CN101356099B (en)
AP (1) AP2306A (en)
AT (1) ATE503700T1 (en)
BR (1) BRPI0620964A2 (en)
DE (1) DE602006021070D1 (en)
EA (1) EA013390B1 (en)
WO (1) WO2007080450A2 (en)

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Also Published As

Publication number Publication date
WO2007080450A2 (en) 2007-07-19
EA200801532A1 (en) 2008-12-30
AP2008004536A0 (en) 2008-08-31
BRPI0620964A2 (en) 2011-11-29
EP1981779B1 (en) 2011-03-30
EP1981779A2 (en) 2008-10-22
ATE503700T1 (en) 2011-04-15
WO2007080450A3 (en) 2007-11-29
CN101356099B (en) 2010-08-11
AP2306A (en) 2011-10-31
DE602006021070D1 (en) 2011-05-12
US20090003737A1 (en) 2009-01-01
EA013390B1 (en) 2010-04-30
CN101356099A (en) 2009-01-28

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