EP0471211A1 - Easy opening flexible package containing Mozarella and packaging method - Google Patents

Easy opening flexible package containing Mozarella and packaging method Download PDF

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Publication number
EP0471211A1
EP0471211A1 EP91112223A EP91112223A EP0471211A1 EP 0471211 A1 EP0471211 A1 EP 0471211A1 EP 91112223 A EP91112223 A EP 91112223A EP 91112223 A EP91112223 A EP 91112223A EP 0471211 A1 EP0471211 A1 EP 0471211A1
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EP
European Patent Office
Prior art keywords
liquid
sachet
film
bag
packaging
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.)
Granted
Application number
EP91112223A
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German (de)
French (fr)
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EP0471211B1 (en
Inventor
Giancarlo Montesissa
Giovanni Prella
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.)
Societe des Produits Nestle SA
Nestle SA
Original Assignee
Societe des Produits Nestle SA
Nestle SA
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Publication date
Application filed by Societe des Produits Nestle SA, Nestle SA filed Critical Societe des Produits Nestle SA
Publication of EP0471211A1 publication Critical patent/EP0471211A1/en
Application granted granted Critical
Publication of EP0471211B1 publication Critical patent/EP0471211B1/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
    • 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
    • B65D75/66—Inserted or applied tearing-strings or like flexible 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
    • 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
    • B65B61/182—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying tear-strips or tear-tapes

Definitions

  • the invention relates to a packaging of the flexible sachet type with easy opening, in particular for a liquid food product or one containing a liquid.
  • This presentation has the advantage of being economical: it uses little packaging material and allows the continuous filling of the sachets during manufacture. In addition, it protects the environment because the plastic packaging material, for example polyethylene, can be destroyed without emitting pollutants. In addition, these sachets are practical, compact and their outer face can be printed to transmit a message or appear a brand.
  • Such packaging must be airtight, that is to say that it must resist the pressure of the liquid and that any leakage must be excluded, in particular for reasons of preservation of the products. This explains why they usually do not have a facilitated opening device, since current devices include pre-cuts or weakening lines in the wall of the bag, incompatible with the sealing requirement.
  • the tear strip should be wide and precisely adjusted along the longitudinal edges of the film.
  • the longitudinal sealing zones along the strip would necessarily be narrow. Creating an anti-seal area at the side seal would require perfect adjustment and synchronization of the side seal and bag cutout elements and the side seal area would be tight there. All these factors would multiply the risk of leaks in the case of the packaging of a liquid product exerting a load constraint on the sealing zones during filling and handling of the sachets.
  • the invention proposes to solve the problem of continuous packaging in sachets of a liquid product or containing a liquid with easier opening without risk of leaks.
  • the invention therefore relates to a packaging of the flexible bag type formed by tubular wrapping by means of a mono- or bi-stretched film comprising an external tear strip for easier opening, in particular for liquid food product or containing a solid product immersed in liquid.
  • the packaging according to the invention is characterized in that it is liquid-tight and that the tear strip is heat-sealed on a part of the outer wall of the bag parallel to an orientation of the film.
  • the tear strip is pre-incised transversely at one of its ends, for example over 3/4 of its width, so as to create a gripping tab as will be explained later.
  • the tear strip is made of the same material as the film of the bag and of greater thickness. It can consist of a laminated complex, the layer of which in contact with the sachet is made of the same material as the sachet.
  • the film of the sachet is mono-stretched which gives it an orientation in a direction.
  • the tear tape is parallel to the orientation of the film, it can be torn along a straight line formed by the weld line between the film and the tear tape without the need for to create a line of weakness in its thickness.
  • the tear strip is heat sealed at a location near a longitudinal edge of the bag.
  • the film can be made of a flexible plastic waterproof material oriented by stretching usable in the food industry, for example polyolefin such as low or medium density polyethylene.
  • polyolefin films are heat sealed to themselves without using lacquer. These films can be surface treated so that they can be printed.
  • the tear strip can be made, for example, of a polyester / polyethylene complex, the polyethylene layer being in contact with the film of the sachet, which allows the heat sealing of the strip on the sachet.
  • the invention also relates to a method of packaging a liquid food product or containing a solid product immersed in a liquid in which a flexible mono- or bi-stretched film is continuously formed in a tube by longitudinal sealing, the tube is filled. of product, seal it crosswise and cut the sachets.
  • the method is characterized by the fact that an external tear strip by heat sealing is applied to the film before filling or to the tube being filled outside the longitudinal sealing zone parallel to an orientation of the film.
  • the tear-off strip is applied over only part of the length of a sachet, so as to create gripping tabs enabling priming to be started.
  • a tab is created because the part of the strip which is not heat-sealed on the external face of the bag is pre-incised over part of its width, near its end close to the transverse weld line of the bag and can be easily released by traction to initiate the opening of the bag.
  • balls of mozzarella 1 and their preservation liquid 2 are contained in a flexible envelope 3 made of low or medium density polyethylene mono-drawn made from a section of tube 4.
  • the section of tube 4 is closed by a lower transverse weld 5 and an upper transverse weld 6.
  • a longitudinal weld 7 closes the tube 4 in the middle of the rear face 8 of the bag.
  • On the front face 9 of the bag and on the outside is welded a tear strip 10 in the vicinity of the longitudinal edge 11.
  • the strip is made of low or medium density polyethylene with a thickness twice that of the envelope, pre-incised and welded over part 12 of its length and leaves an unwelded part free to facilitate the release of a grip tab 13 intended to initiate the uprooting. As shown, the strip is welded to the weld 5. Of course, the strip weld line could stop in the vicinity of the lower end of the bag provided that a sufficient opening is created to easily extract the mozzarella balls.
  • the bag 14 has two longitudinal clips 15,16 on each side so as to form a bellows.
  • the only difference with the envelope 3 is that the lateral welds take the folds and therefore consist of 4 layers at their ends.
  • the wrapping film 17 unwinding from the roll 18 will deploy on the conveyor line by means of a sailor neck shaper 19.
  • the film 17 follows this neck which surrounds the top of a vertical metal tube 20.
  • the neck causes the film to surround the tube.
  • the film hose 21 thus formed is sealed by a heated flat iron 22 which will press the two selvedges 23 and 24 superimposed longitudinally of the film on the counterpart of the tube.
  • the hose 21, released from the tube is clamped by two transverse irons 25 and 26 which ensure the transverse closure by welding.
  • the metered product is sent by gravity through the hopper 27 inside the tube 20 and falls on the lower transverse weld 5.
  • the hose thus loaded descends, from the width provided for the sachet, by a drive system 28 pulling the bag down and it is welded by the two transverse bars 25 and 26.
  • the width of the weld surface of the transverse bars can be separated by a cutting blade 29 making it possible to ensure both the closing of the 'a sachet, the sealing of the bottom of the next sachet and the release of each individual sachet from the machine.
  • a reel 30 delivers the tear strip which is pre-incised at 31, then sealed by a welding jaw 32 over only part of its length.
  • the end of the non-heat-sealed strip on the outside of the bag is caught in the transverse sealing of the bag beyond the incision, which forms a loop.
  • the gripping tab is easily released by simple traction by breaking the bridge of material remaining in the width of the strip after the incision.
  • the tear strip is unwound from the coil 30, pre-incised at 31 and applied by a soldering iron 33 to the hose 21 already formed.

Abstract

A flexible liquid-tight bag (3) intended for packaging a liquid food product or a food product containing a solid product (1) immersed in a liquid (2) is produced, being equipped with a tear-off strip (10) permitting easy opening of the bag without discharge of liquid. The tear-off strip (10) is heat-welded on the outer face of the bag in the direction of drawing of the film forming the bag. <IMAGE>

Description

L'invention concerne un emballage du type sachet flexible à ouverture facilitée, notamment pour produit alimentaire liquide ou contenant un liquide.The invention relates to a packaging of the flexible sachet type with easy opening, in particular for a liquid food product or one containing a liquid.

Certains produits liquides ou contenant des liquides, par exemple la mozzarella sont commercialisés en sachets souples et étanches appelés "flow-pack".Certain liquid or liquid-containing products, for example mozzarella, are sold in flexible and waterproof bags called "flow-packs".

Cette présentation a l'avantage d'être économique: elle utilise peu de matériau d'emballage et permet le remplissage en continu des sachets en cours de fabrication. Par ailleurs, elle ménage l'environnement car le matériau plastique d'emballage, par exemple le polyéthylène, peut être détruit sans émission de polluant. De plus, ces sachets sont pratiques, de faible encombrement et leur face extérieure peut être imprimée pour transmettre un message ou figurer une marque.This presentation has the advantage of being economical: it uses little packaging material and allows the continuous filling of the sachets during manufacture. In addition, it protects the environment because the plastic packaging material, for example polyethylene, can be destroyed without emitting pollutants. In addition, these sachets are practical, compact and their outer face can be printed to transmit a message or appear a brand.

De tels emballages doivent être étanches, c'est-à-dire qu'ils doivent résister à la pression du liquide et que toute fuite doit être exclue, notamment pour des motifs de conservation des produits. Ceci explique pourquoi ils ne présentent habituellement pas de dispositif d'ouverture facilitée, car les dispositifs courants comprennent des pré-découpes ou des lignes d'affaiblissement dans la paroi même du sachet, incompatibles avec l'exigence d'étanchéité.Such packaging must be airtight, that is to say that it must resist the pressure of the liquid and that any leakage must be excluded, in particular for reasons of preservation of the products. This explains why they usually do not have a facilitated opening device, since current devices include pre-cuts or weakening lines in the wall of the bag, incompatible with the sealing requirement.

Enfin, l'extraction des produits des emballages, en vue de leur consommation, nécessite la découpe ou le percement d'une ouverture suffisamment grande, normalement avec une paire de ciseaux, pour laisser s'écouler le liquide et ensuite sortir le produit. Le liquide contenu dans le sachet se déverse immanquablement lors de cette opération en éclaboussant l'utilisateur.Finally, the extraction of the products from the packaging, with a view to their consumption, requires cutting or drilling a sufficiently large opening, normally with a pair of scissors, to allow the liquid to flow and then take out the product. The liquid contained in the sachet inevitably spills during this operation by splashing the user.

On connaît un emballage et un procédé d'emballage d'un produit en sachet, dans lequel la bande d'arrachage pour l'ouverture facilitée est appliquée par thermoscellage sur les bords longitudinaux d'un film formant tube et sert à sceller le tube longitudinalement, décrit dans le brevet US.A 3.373.926. Ce système nécessite l'application d'un trait de matière antiscellage aux extrémités de la bande d'arrachage pour permettre la création d'amorces de préhension. Un tel emballage est destiné au conditionnement des produits secs du type des snacks, mais n'est pas adapté à l'enveloppement de produits liquides pour lesquels le sachet doit être étanche et les zones de scellage résistantes.There is known a packaging and a method of packaging a product in a sachet, in which the tear strip for easy opening is applied by heat sealing on the longitudinal edges of a film forming a tube and serves to seal the tube longitudinally. , described in US Pat. No. 3,373,926. This system requires the application of a line of anti-sealing material at the ends of the tear strip to allow the creation of grips. Such packaging is intended for packaging dry products such as snacks, but is not suitable for wrapping liquid products for which the sachet must be sealed and the sealing zones resistant.

Pour réaliser un scellage étanche, la bande d'arrachage devrait être large et être ajustée de manière précise le long des bords longitudinaux du film. Les zônes de scellage longitudinal le long de la bande seraient nécessairement étroites. La création d'une zône anti-scellage au niveau du scellage latéral nécessiterait un ajustage et une synchronisation parfaits des éléments de scellage latéral et de découpe des sachets et la zône de scellage latéral serait étroite à cet endroit. Tous ces facteurs multiplieraient les risques de formation de fuites dans le cas de l'emballage d'un produit liquide exerçant une contrainte de charge sur les zônes de scellage lors du remplissage et des manipulations des sachets.To achieve a tight seal, the tear strip should be wide and precisely adjusted along the longitudinal edges of the film. The longitudinal sealing zones along the strip would necessarily be narrow. Creating an anti-seal area at the side seal would require perfect adjustment and synchronization of the side seal and bag cutout elements and the side seal area would be tight there. All these factors would multiply the risk of leaks in the case of the packaging of a liquid product exerting a load constraint on the sealing zones during filling and handling of the sachets.

L'invention se propose de résoudre le problème de l'emballage en continu en sachet d'un produit liquide ou contenant un liquide avec ouverture facilitée sans risque de fuites.The invention proposes to solve the problem of continuous packaging in sachets of a liquid product or containing a liquid with easier opening without risk of leaks.

L'invention concerne donc un emballage du type sachet flexible formé par enveloppement tubulaire au moyen d'un film mono- ou bi-étiré comportant une bande d'arrachage extérieure pour ouverture facilitée, notamment pour produit alimentaire liquide ou contenant un produit solide immergé dans un liquide.The invention therefore relates to a packaging of the flexible bag type formed by tubular wrapping by means of a mono- or bi-stretched film comprising an external tear strip for easier opening, in particular for liquid food product or containing a solid product immersed in liquid.

L'emballage selon l'invention est caractérisé par le fait qu'il est étanche aux liquides et que la bande d'arrachage est thermosoudée sur une partie de la paroi extérieure du sachet parallèlement à une orientation du film.The packaging according to the invention is characterized in that it is liquid-tight and that the tear strip is heat-sealed on a part of the outer wall of the bag parallel to an orientation of the film.

Dans une réalisation préférée de l'emballage selon l'invention, la bande d'arrachage est pré-incisée transversalement à l'une de ses extrémités, par exemple sur les 3/4 de sa largeur, de manière à créer une patte de préhension ainsi qu'il sera expliqué plus loin. De préférence, la bande d'arrachage est en même matériau que le film du sachet et d'épaisseur plus grande. Elle peut être constituée d'un complexe laminé dont la couche au contact du sachet est en même matériau que le sachet.In a preferred embodiment of the packaging according to the invention, the tear strip is pre-incised transversely at one of its ends, for example over 3/4 of its width, so as to create a gripping tab as will be explained later. Preferably, the tear strip is made of the same material as the film of the bag and of greater thickness. It can consist of a laminated complex, the layer of which in contact with the sachet is made of the same material as the sachet.

Avantageusement, le film du sachet est mono-étiré ce qui lui donne une orientation selon une direction. Du fait que la bande d'arrachage est parallèle à l'orientation du film, celui-ci peut être déchiré suivant une droite constituée par la ligne de soudure entre le film et la bande d'arrachage sans qu'il n'y ait besoin de créer de ligne d'affaiblissement dans son épaisseur. De préférence, la bande d'arrachage est thermosoudée en un endroit proche d'un bord longitudinal du sachet.Advantageously, the film of the sachet is mono-stretched which gives it an orientation in a direction. Because the tear tape is parallel to the orientation of the film, it can be torn along a straight line formed by the weld line between the film and the tear tape without the need for to create a line of weakness in its thickness. Preferably, the tear strip is heat sealed at a location near a longitudinal edge of the bag.

Le choix du matériau constitutif du film est dicté par les exigences de l'application.The choice of the material of the film is dictated by the requirements of the application.

Ainsi, le film peut être réalisé en une matière plastique flexible étanche à l'eau orientée par étirement utilisable dans l'industrie alimentaire, par exemple en polyoléfine comme le polyéthylène basse ou moyenne densité. L'intérêt des films de polyoléfines est qu'ils peuvent être thermosoudées à eux-mêmes sans faire intervenir de laque. Ces films peuvent être traités en surface de manière à pouvoir être imprimés.Thus, the film can be made of a flexible plastic waterproof material oriented by stretching usable in the food industry, for example polyolefin such as low or medium density polyethylene. The advantage of polyolefin films is that they can be heat sealed to themselves without using lacquer. These films can be surface treated so that they can be printed.

La bande d'arrachage peut être réalisée par exemple en complexe polyester/polyéthylène, la couche de polyéthylène étant au contact du film du sachet, ce qui permet la thermosoudure de la bande sur le sachet.The tear strip can be made, for example, of a polyester / polyethylene complex, the polyethylene layer being in contact with the film of the sachet, which allows the heat sealing of the strip on the sachet.

L'invention concerne également un procédé d'emballage d'un produit alimentaire liquide ou contenant un produit solide immergé dans un liquide dans lequel on forme en continu un film flexible mono- ou bi-étiré en tube par scellage longitudinal, on remplit le tube de produit, on le scelle transversalement et on découpe les sachets.The invention also relates to a method of packaging a liquid food product or containing a solid product immersed in a liquid in which a flexible mono- or bi-stretched film is continuously formed in a tube by longitudinal sealing, the tube is filled. of product, seal it crosswise and cut the sachets.

Le procédé est caractérisé par le fait que l'on applique sur le film avant remplissage ou sur le tube en cours de remplissage une bande d'arrachage extérieure par thermosoudure en dehors de la zone de scellage longitudinal parallèlement à une orientation du film.The method is characterized by the fact that an external tear strip by heat sealing is applied to the film before filling or to the tube being filled outside the longitudinal sealing zone parallel to an orientation of the film.

De préférence, on applique la bande d'arrachage sur une partie seulement de la longueur d'un sachet, de manière à créer des pattes de préhension permettant d'amorcer l'arrachage. Avantageusement une telle patte est créée du fait que la partie de la bande non thermosoudée sur la face externe du sachet est pré-incisée sur une partie de sa largeur, au voisinage de son extrémité proche de la ligne de soudure transversale du sachet et peut être libérée facilement par traction pour amorcer l'ouverture du sachet.Preferably, the tear-off strip is applied over only part of the length of a sachet, so as to create gripping tabs enabling priming to be started. Advantageously, such a tab is created because the part of the strip which is not heat-sealed on the external face of the bag is pre-incised over part of its width, near its end close to the transverse weld line of the bag and can be easily released by traction to initiate the opening of the bag.

L'invention sera mieux comprise à l'aide de la description de la forme d'exécution ci-après donnée à titre d'exemple par référence aux dessins dans lesquels:

  • - la figure 1 illustre un sachet de mozzarella sous forme d'enveloppe selon l'invention,
  • - la figure 2 illustre une variante de l'emballage selon l'invention relative à un sachet à soufflet,
  • - les figures 3 à 5 illustrent les différentes phases d'ouverture du sachet,
  • - la figure 6 représente schématiquement un mode de réalisation du procédé d'emballage selon l'invention et
  • - la figure 7 représente schématiquement une variante du procédé d'emballage selon l'invention.
The invention will be better understood using the description of the embodiment below given by way of example with reference to the drawings in which:
  • FIG. 1 illustrates a sachet of mozzarella in the form of an envelope according to the invention,
  • FIG. 2 illustrates a variant of the packaging according to the invention relating to a bellows bag,
  • FIGS. 3 to 5 illustrate the different phases of opening the bag,
  • FIG. 6 schematically represents an embodiment of the packaging method according to the invention and
  • - Figure 7 schematically shows a variant of the packaging method according to the invention.

A la figure 1, des boules de mozzarella 1 et leur liquide de conservation 2 sont contenus dans une enveloppe flexible 3 en polyéthylène basse ou moyenne densité mono-étiré constituée à partir d'un tronçon de tube 4. Le tronçon de tube 4 est fermé par une soudure transversale inférieure 5 et une soudure transversale supérieure 6. Une soudure longitudinale 7 ferme le tube 4 au milieu de la face postérieure 8 du sachet. Sur la face antérieure 9 du sachet et à l'extérieur est soudée une bande d'arrachage 10 au voisinage du bord longitudinal 11.In FIG. 1, balls of mozzarella 1 and their preservation liquid 2 are contained in a flexible envelope 3 made of low or medium density polyethylene mono-drawn made from a section of tube 4. The section of tube 4 is closed by a lower transverse weld 5 and an upper transverse weld 6. A longitudinal weld 7 closes the tube 4 in the middle of the rear face 8 of the bag. On the front face 9 of the bag and on the outside is welded a tear strip 10 in the vicinity of the longitudinal edge 11.

La bande est en polyéthylène basse ou moyenne densité d'épaisseur double de celle de l'enveloppe, pré-incisée et soudée sur une partie 12 de sa longueur et laisse libre une partie non soudée pour faciliter la libération d'une patte de préhension 13 destinée à amorcer l'arrachage. Telle que représentée, la bande est soudée jusqu'à la soudure 5. Bien entendu, la ligne de soudure de la bande pourrait s'arrêter au voisinage de l'extrémité inférieure du sachet pourvu qu'une ouverture suffisante soit créée pour extraire aisément les boules de mozzarella.The strip is made of low or medium density polyethylene with a thickness twice that of the envelope, pre-incised and welded over part 12 of its length and leaves an unwelded part free to facilitate the release of a grip tab 13 intended to initiate the uprooting. As shown, the strip is welded to the weld 5. Of course, the strip weld line could stop in the vicinity of the lower end of the bag provided that a sufficient opening is created to easily extract the mozzarella balls.

A la figure 2, le sachet 14 présente deux pinces longitudinales 15,16 de chaque côté de manière à former un soufflet. La seule différence avec l'enveloppe 3 est que les soudures latérales prennent les plis et sont donc constituées de 4 couches à leurs extrémités.In Figure 2, the bag 14 has two longitudinal clips 15,16 on each side so as to form a bellows. The only difference with the envelope 3 is that the lateral welds take the folds and therefore consist of 4 layers at their ends.

Comme montré aux figures 3,4 et 5, pour ouvrir le sachet, on le fait pivoter de 90° puis on libère la patte 13 de préhension en déchirant la pré-incision et saisit la bande d'arrachage 10 par la patte 13 entre le pouce et l'index et on la tire par exemple vers la droite. Le sachet se déchire alors proprement le long de la ligne de soudure parallèle au bord supérieur longitudinal du sachet selon la direction d'étirement du film. On peut alors vider le liquide et extraire le produit, par exemple les boules de mozzarella par la fente ainsi ménagée sans projection de liquide.As shown in Figures 3,4 and 5, to open the bag, it is rotated by 90 ° then we release the gripping tab 13 by tearing the pre-incision and grips the tear strip 10 by the tab 13 between the thumb and index finger and pull it for example to the right. The sachet then tears cleanly along the weld line parallel to the longitudinal upper edge of the sachet in the direction of stretching of the film. We can then empty the liquid and extract the product, for example the mozzarella balls through the slot thus formed without projection of liquid.

A la figure 6, le film d'emballage 17 en déroulement du rouleau 18 va se déployer sur la ligne de convoyage par l'intermédiaire d'un conformateur en col de marin 19. Le film 17 épouse ce col qui entoure le sommet d'un tube métallique vertical 20.In FIG. 6, the wrapping film 17 unwinding from the roll 18 will deploy on the conveyor line by means of a sailor neck shaper 19. The film 17 follows this neck which surrounds the top of a vertical metal tube 20.

Le col provoque l'entourage du tube par le film. Le boyau de film 21 ainsi formé est scellé par un fer plat 22 chauffé qui va presser longitudinalement les deux lisières 23 et 24 superposées du film sur la contrepartie du tube. A la sortie du tube, le boyau 21, libéré du tube est pincé par deux fers transversaux 25 et 26 qui assurent la fermeture transversale par soudure. Simultanément, le produit dosé est envoyé par gravité par la trémie 27 à l'intérieur du tube 20 et tombe sur la soudure transversale inférieure 5. Le boyau ainsi chargé descend, de la largeur prévue pour le sachet, par un système d'entraînement 28 tirant vers le bas le sachet et celui-ci est soudé par les deux fers transversaux 25 et 26. La largeur de la surface de soudure des fers transversaux peut être séparée par une lame de coupe 29 permettant d'assurer à la fois la fermeture d'un sachet, la soudure du fond du sachet suivant et la libération de chaque sachet individuel de la machine.The neck causes the film to surround the tube. The film hose 21 thus formed is sealed by a heated flat iron 22 which will press the two selvedges 23 and 24 superimposed longitudinally of the film on the counterpart of the tube. At the outlet of the tube, the hose 21, released from the tube is clamped by two transverse irons 25 and 26 which ensure the transverse closure by welding. Simultaneously, the metered product is sent by gravity through the hopper 27 inside the tube 20 and falls on the lower transverse weld 5. The hose thus loaded descends, from the width provided for the sachet, by a drive system 28 pulling the bag down and it is welded by the two transverse bars 25 and 26. The width of the weld surface of the transverse bars can be separated by a cutting blade 29 making it possible to ensure both the closing of the 'a sachet, the sealing of the bottom of the next sachet and the release of each individual sachet from the machine.

Avant la conformation du film en boyau, une bobine 30 délivre la bande d'arrachage qui est pré-incisée en 31, puis scellée par une mâchoire de soudure 32 sur une partie seulement de sa longueur. L'extrémité de la bande non-thermosoudée à la face extérieure du sachet est prise dans la soudure transversale du sachet au-delà de l'incision, ce qui forme une boucle. Lors de l'ouverture, la patte de préhension est facilement libérée par simple traction par rupture du pont de matière subsistant dans la largeur de la bande après l'incision.Before the film is formed into a hose, a reel 30 delivers the tear strip which is pre-incised at 31, then sealed by a welding jaw 32 over only part of its length. The end of the non-heat-sealed strip on the outside of the bag is caught in the transverse sealing of the bag beyond the incision, which forms a loop. When opening, the gripping tab is easily released by simple traction by breaking the bridge of material remaining in the width of the strip after the incision.

A la figure 7, la bande d'arrachage est déroulée de la bobine 30, pré-incisée en 31 et appliquée par un fer de soudure 33 sur le boyau 21 déjà formé.In FIG. 7, the tear strip is unwound from the coil 30, pre-incised at 31 and applied by a soldering iron 33 to the hose 21 already formed.

Le procédé d'emballage a été décrit pour la forme en enveloppe de la figure 1. Bien entendu, la réalisation de sachets à soufflets conformément à la figure 2 est semblable sauf qu'elle nécessite des organes réalisant le pincement du boyau après sa formation.The packaging process has been described for the envelope form of FIG. 1. Of course, the production of bellows sachets in accordance with FIG. 2 is similar except that it requires members carrying out the clamping of the hose after its formation.

Claims (10)

1. Emballage du type sachet flexible formé par enveloppement tubulaire au moyen d'un film mono- ou bi-étiré comportant une bande d'arrachage extérieure pour ouverture facilitée, notamment pour produit alimentaire liquide ou contenant un produit solide immergé dans un liquide, caractérisé par le fait que l'emballage est étanche aux liquides et que la bande d'arrachage est thermosoudée sur une partie de la paroi extérieure du sachet parallèlement à une orientation du film.1. Packaging of the flexible bag type formed by tubular wrapping by means of a mono- or bi-stretched film comprising an external tear strip for easier opening, in particular for liquid food product or containing a solid product immersed in a liquid, characterized by the fact that the packaging is liquid-tight and that the tear strip is heat-sealed on a part of the outer wall of the bag parallel to an orientation of the film. 2. Emballage selon la revendication 1, caractérisé par le fait que la bande d'arrachage est en même matériau que le film du sachet et d'épaisseur plus grande.2. Packaging according to claim 1, characterized in that the tear strip is made of the same material as the film of the bag and of greater thickness. 3. Emballage selon la revendication 1, caractérisé par le fait que le film du sachet est mono-étiré.3. Packaging according to claim 1, characterized in that the film of the sachet is mono-stretched. 4. Emballage selon la revendication 1, caractérisé par le fait que la bande d'arrachage est thermosoudée en un endroit proche d'un bord longitudinal du sachet.4. Packaging according to claim 1, characterized in that the tear strip is heat sealed at a location near a longitudinal edge of the bag. 5. Emballage selon la revendication 1, caractérisé par le fait que le sachet comporte des pinces dans sa longueur et se présente sous forme de soufflet.5. Packaging according to claim 1, characterized in that the bag has clips in its length and is in the form of a bellows. 6. Emballage selon la revendication 1, caractérisé par le fait que le sachet se présente sous forme d'enveloppe.6. Packaging according to claim 1, characterized in that the sachet is in the form of an envelope. 7. Produit alimentaire liquide ou contenant un produit solide immergé dans un liquide, notamment mozzarella et son liquide de conservation, emballé dans un emballage selon l'une des revendications 1 à 6.7. Liquid food product or containing a solid product immersed in a liquid, in particular mozzarella and its preservation liquid, packaged in a packaging according to one of claims 1 to 6. 8. Procédé d'emballage d'un produit alimentaire liquide ou contenant un produit solide immergé dans un liquide, dans lequel on forme en continu un film flexible mono- ou bi-étiré en tube par scellage longitudinal, on remplit le tube de produit, on le scelle transversalement et on découpe les sachets, caractérisé par le fait que l'on applique sur le film avant le remplissage ou sur le tube en cours de remplissage une bande d'arrachage par thermosoudure en dehors de la zone de scellage longitudinal parallèlement à une orientation du film.8. Method for packaging a liquid food product or containing a solid product immersed in a liquid, in which a flexible mono- or bi-stretched film is continuously formed in a tube by longitudinal sealing, the tube is filled with product, it is sealed transversely and the sachets are cut, characterized in that a tear strip by heat sealing is applied to the film before filling or to the tube being filled outside the longitudinal sealing zone parallel to an orientation of the film. 9. Procédé selon la revendication 8, caractérisé par le fait que l'on applique la bande d'arrachage sur une partie seulement de la longueur d'un sachet, que l'extrémité de la bande non-thermosoudée à la face extérieure du sachet est prise dans la soudure transversale du sachet, ce qui forme une boucle et que la bande est pré-incisée sur une partie de sa largeur au voisinage de son extrémité proche de la ligne de soudure transversale du sachet.9. Method according to claim 8, characterized in that one applies the tear strip on only part of the length of a sachet, that the end of the non-heat sealed strip to the outer face of the sachet is caught in the transverse weld of the sachet, which forms a loop and that the strip is pre-incised over part of its width in the vicinity of its end close to the transverse weld line of the sachet. 10. Procédé selon la revendication 9, caractérisé par le fait qu'une patte permettant l'arrachage est libérée par simple traction de la boucle.10. Method according to claim 9, characterized in that a tab allowing the tearing is released by simple pulling of the loop.
EP91112223A 1990-08-13 1991-07-22 Easy opening flexible package containing Mozarella and packaging method Expired - Lifetime EP0471211B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP90115485 1990-08-13
EP90115485 1990-08-13

Publications (2)

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EP0471211A1 true EP0471211A1 (en) 1992-02-19
EP0471211B1 EP0471211B1 (en) 1995-01-25

Family

ID=8204323

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Application Number Title Priority Date Filing Date
EP91112223A Expired - Lifetime EP0471211B1 (en) 1990-08-13 1991-07-22 Easy opening flexible package containing Mozarella and packaging method

Country Status (10)

Country Link
EP (1) EP0471211B1 (en)
JP (1) JPH04327121A (en)
AR (1) AR248253A1 (en)
BR (1) BR9103448A (en)
DE (1) DE69106979T2 (en)
DK (1) DK0471211T3 (en)
ES (1) ES2068438T3 (en)
GR (1) GR3015804T3 (en)
MX (1) MX174640B (en)
PT (1) PT98642B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2290518A (en) * 1994-06-09 1996-01-03 Nestle Italiana Spa Packaging of mozzarella cheese
DE10101661A1 (en) * 2001-01-16 2002-07-18 Rovema Gmbh Plastic free-standing bag has stabilizing seams, side folds, peel-off seam, tear-off aid.
US10407229B2 (en) 2014-10-09 2019-09-10 Intercontinental Great Brands Llc Packages containing a food product and methods of opening
US10589904B2 (en) 2015-12-21 2020-03-17 Dow Global Technologies Llc Flexible packaging with a straining feature
US10829288B2 (en) 2015-12-21 2020-11-10 Dow Global Technologies Llc Rigid packaging with a straining feature

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3179326A (en) * 1960-07-21 1965-04-20 Union Carbide Corp Method for forming uniaxially oriented films and the product formed thereby
FR1545964A (en) * 1966-11-11 1968-11-15 Method for manufacturing tubular packages of food products, device for implementing said method and packages obtained by said method
DE2152910A1 (en) * 1970-10-26 1972-05-04 Agfa-Gevaert Ag, 5090 Leverkusen Method of packaging sheet material

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
US3098601A (en) * 1958-12-31 1963-07-23 Procter & Gamble Tear tape for thermoplastic packaging materials
US3311032A (en) * 1964-12-24 1967-03-28 Procter & Gamble Tear tape for plastic packaging materials
US3711011A (en) * 1970-05-04 1973-01-16 Action Packaging Corp Resealable packaging device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179326A (en) * 1960-07-21 1965-04-20 Union Carbide Corp Method for forming uniaxially oriented films and the product formed thereby
FR1545964A (en) * 1966-11-11 1968-11-15 Method for manufacturing tubular packages of food products, device for implementing said method and packages obtained by said method
DE2152910A1 (en) * 1970-10-26 1972-05-04 Agfa-Gevaert Ag, 5090 Leverkusen Method of packaging sheet material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2290518A (en) * 1994-06-09 1996-01-03 Nestle Italiana Spa Packaging of mozzarella cheese
DE10101661A1 (en) * 2001-01-16 2002-07-18 Rovema Gmbh Plastic free-standing bag has stabilizing seams, side folds, peel-off seam, tear-off aid.
US10407229B2 (en) 2014-10-09 2019-09-10 Intercontinental Great Brands Llc Packages containing a food product and methods of opening
US10865027B2 (en) 2014-10-09 2020-12-15 Intercontinental Great Brands Llc Packages containing a food product and methods of opening
US10589904B2 (en) 2015-12-21 2020-03-17 Dow Global Technologies Llc Flexible packaging with a straining feature
US10829288B2 (en) 2015-12-21 2020-11-10 Dow Global Technologies Llc Rigid packaging with a straining feature

Also Published As

Publication number Publication date
PT98642A (en) 1993-09-30
DE69106979T2 (en) 1995-05-24
EP0471211B1 (en) 1995-01-25
DK0471211T3 (en) 1995-05-29
BR9103448A (en) 1992-05-12
DE69106979D1 (en) 1995-03-09
ES2068438T3 (en) 1995-04-16
JPH04327121A (en) 1992-11-16
MX174640B (en) 1994-05-30
PT98642B (en) 1999-01-29
GR3015804T3 (en) 1995-07-31
AR248253A1 (en) 1995-07-12

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