EP0451069A1 - Bag made of heat sealable material and means for insuring its repeated closure - Google Patents

Bag made of heat sealable material and means for insuring its repeated closure Download PDF

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Publication number
EP0451069A1
EP0451069A1 EP91420115A EP91420115A EP0451069A1 EP 0451069 A1 EP0451069 A1 EP 0451069A1 EP 91420115 A EP91420115 A EP 91420115A EP 91420115 A EP91420115 A EP 91420115A EP 0451069 A1 EP0451069 A1 EP 0451069A1
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EP
European Patent Office
Prior art keywords
bag
welded
length
bag according
strip
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
EP91420115A
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German (de)
French (fr)
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EP0451069B1 (en
Inventor
Claude Richard
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.)
Ets C Richard - Pates Alpina SA
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Ets C Richard - Pates Alpina SA
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Priority to AT91420115T priority Critical patent/ATE91992T1/en
Publication of EP0451069A1 publication Critical patent/EP0451069A1/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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks

Definitions

  • the invention relates to a bag of heat-sealable material for dry bulk products. It also relates to a device capable of ensuring the repeated closing of such sachets.
  • the invention aims to overcome these various drawbacks. It is aimed at a bag for dry bulk products which is simple and easy to open, without causing damage to the bag itself, and the contents of which are also poured in a simple and directed manner.
  • the invention consists in no longer traditionally welding the entire length of the upper end, but only weld the latter in part only, in order to define at the level of the non-welded part a zone which can be folded towards the inside of the bag and defining the pouring spout, making it possible to pour the contents of the bag in a directed and not anarchic manner this has so far been the case.
  • the invention also relates to a device able to allow the closure of the upper end of such a bag.
  • This device basically comprises a pair of heating jaws, having an active toothed part, the length of which corresponds to the length of the upper end to be welded, associated with an inactive part devoid of any toothed element, corresponding at least to the length of the 'upper end not welded.
  • the inactive part receives a polytetrafluoroethylene (PTFE) insert, the thickness of which corresponds to that of the active part, and this for the purpose of pinching and gripping the upper end of the bag during the step of welding.
  • PTFE polytetrafluoroethylene
  • Figure 1 is a schematic perspective view of a closed bag according to the invention.
  • Figure 2 is a schematic perspective view of the same bag in which the upper end is partially open.
  • Figure 3 is a schematic perspective view of the bag according to the invention in which the folds corresponding to the area of the upper end not welded are deployed outward to form the spout.
  • Figure 4 is a schematic perspective view of the closed bag according to the invention according to an improved embodiment.
  • Figure 5 is a plan view of a set of heated jaws of the device according to the invention in the operational position.
  • FIG. 6 is a view similar to that of FIG. 5, in which the inactive part of the jaws receives an insert made of PTFE.
  • the bags of heat-sealable material for dry and bulk products are produced from a film of heat-sealable material which is positioned on a shaping device of appropriate shape, suitable for giving it the definitive parallelepiped shape of the bag.
  • a longitudinal edge-to-edge weld 4 is made of the two ends of the film.
  • the bottom of the bag is produced by closing the lower end 3 of said parallelepiped, and this, in a known manner by pinching between two heating jaws, at a temperature at least equal to the melting point of the plastic material. , simultaneously with the production of diametrically opposite folds, directed towards the inside of the bag, in order to obtain a relatively flat bottom.
  • the next step concerns the filling of the sachet, for example by means of metering devices which, in known manner, pour into the sachet a predetermined and calibrated quantity of bulk products.
  • the next phase concerns the closure of the upper end 2 of the bag, once it has been filled, carried out in a similar manner to the production of the bottom 3.
  • the station for carrying out this operation is in fact a double station, on which the upper bag is closed at its lower end 3 and receives the dry and bulk product from a metering device, and the full lower bag is closed at its upper end 2, the additional operation of separating the two sachets made from the same film of heat-sealable material being carried out between the two sets of two welding jaws by means of a knife, guillotine type.
  • the lower sachet is therefore filled when it is closed and then passes to the next so-called "tamping" step, which consists in vibrating said sachet in order to slightly compact the bulk product in the package. In this way, given these vibrations, an empty space is generated at the upper part of the bag, capable of allowing a less loose closure of the bag.
  • a pair of cold jaws intended to produce the folds 7 at the level of the upper end of the bag 1 at this empty space, come to grip the bag at the level of it, and simultaneously, a knife performs a vertical incision to allow the air in this space to be released.
  • the following phase corresponds to the completion of the final weld of the upper end 2 by means of hot jaws, the weld being effected over at least half of the length 5 of the said upper end, but nevertheless less than the withdrawal zone. of the folded part 7 situated on the side of the non-welded part, in order to overcome any risk of welding of this said folded part 7. In fact, this folded part 7 subsequently plays the role of pouring spout by deploying it- this outward.
  • the next step then relates to the closing of the non-welded part 6 of the upper end 2 by means of an adhesive strip 8, glued for example by means of feelers on said part 6 to the upper part of the bag 1.
  • this adhesive strip is provided on its sticky part with transfer glue capable of allowing the bag to be closed after each use.
  • transfer glue capable of allowing the bag to be closed after each use.
  • an area devoid of glue is provided at one of its ends, over a few millimeters.
  • the adhesive strip 8 is permanently glued, the opening of the bag being effected by rupture of this strip. Once the strip removed, or torn, we take out the part folded 7 outwards, so as to form a spout as can be seen in FIG. 3. In this way, the pouring of the contents of the sachet 1 is carried out in a simple and easy manner in the desired direction and in quantity wanted. There is no longer any risk of damage or uncontrolled rupture of the sachet.
  • FIG. 4 represents an improved embodiment of the invention, in which the adhesive strip consists of a label 80 which covers most of the top of the bag 1 and which comprises a precut longitudinal strip 81 arranged astride the end upper 2 of bag 1.
  • the label 80 improves the finished appearance of the sachet, can carry various information relating to the product (and in particular a bar code) and prevents any risk of untimely tearing of the sachet at the level of the end 2.
  • the strip 81 facilitates the opening of the bag 1. It advantageously comprises a means making it possible to facilitate its lifting and tearing, such as a tab 81a projecting from one of the edges of the label 80.
  • Each of these two jaws is provided with a first zone 12 known as toothed active zone capable of allowing the partial welding of the upper end 5 of the bag 1, and a second zone 13 known as inactive, devoid of any active zone so not to weld the corresponding part 6 of the upper end 2 of the bag.
  • this area 13 is filled with two pieces 14, attached by any appropriate means to the two jaws 10 and 11, and made of polytetrafluoroethylene, better known under the registered trademark "TEFLON", and the total thickness of these two parts corresponds to the thickness of the active part 12 of the jaws 10 and 11.
  • TEFLON polytetrafluoroethylene
  • the choice of material used for this part is also dictated by the temperature conditions applied to said jaws 10, 11.
  • the sachets according to the invention prove to be quite easy to use and also simple to open, allowing a rational payment of the contents. It is therefore entirely suitable for all bulk products, such as in particular food products, provided that a food-grade plastic material is used, such as for example polypropylene or polyethylene. This type of bag is therefore suitable for bulk products, for which vacuum storage is not necessary. These products can be in pulverulent form such as in particular flour, or even granular or others, for example pasta, rice, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Bag (1) for loose dry products, constituted by a parallelepipedal envelope made from heat-sealable material welded at its two ends (2) and (3), respectively the upper (2) and lower (3) ends, characterised: - in that the upper end (2) is welded along only a part (5) of its length; - and in that the non-welded part (6) of this end is closed by an adhesive strip (8). Application to the packaging of loose dry products, especially foodstuffs. <IMAGE>

Description

L'invention concerne un sachet en matière thermoscellable pour produits secs en vrac. Elle concerne également un dispositif apte à assurer la fermeture répétée de tels sachets.The invention relates to a bag of heat-sealable material for dry bulk products. It also relates to a device capable of ensuring the repeated closing of such sachets.

De nombreux produits, et notamment des produits alimentaires secs vendus en vrac, le sont soit dans des sachets réalisés en matière thermoscellable transparente, telle que notamment en matière plastique, soit dans des emballages en carton. Les sachets en plastique, réalisés tout d'abord en viscose, puis en polypropylène, voire en polyéthylène, offrent l'avantage d'être transparents, et donc de permettre à l'acheteur de visualiser le produit contenu. Toutefois, ce type de sachet s'avère difficile à ouvrir, la ligne de rupture de la matière plastique étant souvent aléatoire, conduisant quelquefois à l'ouverture du paquet dans sa longueur et conduisant ainsi le contenu de ce dernier à se répandre de façon anarchique. En outre, ces sachets sont quelquefois peu solides, présentant ainsi l'inconvénient mentionné précédemment.Many products, and in particular dry food products sold in bulk, are either in sachets made of transparent heat-sealable material, such as in particular plastic, or in cardboard packaging. Plastic bags, first made of viscose, then polypropylene, or even polyethylene, offer the advantage of being transparent, and therefore allow the buyer to view the product contained. However, this type of bag turns out to be difficult to open, the rupture line of the plastic being often random, sometimes leading to the opening of the packet in its length and thus leading the contents of the latter to spread out of control . In addition, these sachets are sometimes not very solid, thus presenting the drawback mentioned above.

Concernant les emballages en carton, si certes on n'observe plus ces inconvénients, à savoir le manque de robustesse et la difficulté d'ouverture, en revanche, ils s'avèrent généralement moins attrayants pour l'acheteur, compte tenu qu'il ne peut pas en visualiser leur contenu. En outre, ils sont généralement d'un prix de revient plus élevé.Regarding cardboard packaging, although we no longer observe these drawbacks, namely the lack of robustness and the difficulty of opening, on the other hand, they generally prove to be less attractive to the buyer, given that it does not cannot view their content. In addition, they are generally of a higher cost price.

L'invention vise à pallier ces différents inconvénients. Elle vise un sachet pour produits secs en vrac d'ouverture simple et facile à réaliser, sans entraîner des dégradations du sachet proprement dit, et dont le versement du contenu s'effectue également de manière simple et dirigée.The invention aims to overcome these various drawbacks. It is aimed at a bag for dry bulk products which is simple and easy to open, without causing damage to the bag itself, and the contents of which are also poured in a simple and directed manner.

Ce sachet constitué par une enveloppe parallélépipédique en matière thermoscellable soudée à ses deux extrémités, respectivement supérieure et inférieure, est caractérisé :

  • en ce que l'extrémité supérieure est soudée sur une partie seulement de sa longueur ;
  • et en ce que la partie non soudée de cette extrémité est fermée au moyen d'une bande adhésive.
This bag constituted by a parallelepipedic envelope of heat-sealable material welded at its two ends, respectively upper and lower, is characterized:
  • in that the upper end is welded over only part of its length;
  • and in that the non-welded part of this end is closed by means of an adhesive strip.

En d'autres termes, l'invention consiste à ne plus souder de manière traditionnelle la totalité de la longueur de l'extrémité supérieure, mais ne souder celle-ci qu'en partie seulement, afin de définir au niveau de la partie non soudée une zone repliable vers l'intérieur du sachet et définissant bec verseur, permettant de verser le contenu du sachet de manière dirigée et non anarchique comme c'était jusqu'à présent le cas.In other words, the invention consists in no longer traditionally welding the entire length of the upper end, but only weld the latter in part only, in order to define at the level of the non-welded part a zone which can be folded towards the inside of the bag and defining the pouring spout, making it possible to pour the contents of the bag in a directed and not anarchic manner this has so far been the case.

Avantageusement, en pratique:

  • l'extrémité supérieure est soudée sur la moitié au moins de sa longueur ;
  • l'extrémité supérieure de l'enveloppe est repliée de chaque côté vers l'intérieur du sachet définissant ainsi deux plis symétriques, et la longueur de la partie non soudée de l'extrémité supérieure est légèrement supérieure à la longueur du pli correspondant replié vers l'intérieur, de sorte que le déploiement vers l'extérieur de ce pli, formant bec verseur, est toujours possible sans risque de souder ce pli avec l'extrémité supérieure lors de l'étape de soudure ;
  • l'extrémité supérieure du sachet est repliée sur celui-ci, et la bande adhésive relie la portion non soudée de l'extrémité supérieure et le dessus du sachet ;
  • le sachet est réalisé en polypropylène alimentaire transparent, mais on peut toutefois envisager l'utilisation d'une autre matière, telle que notamment le polyéthylène ou tout autre film d'emballage thermoscellable ;
  • le sachet est destiné à renfermer des produits alimentaires secs et en vrac.
Advantageously, in practice:
  • the upper end is welded over at least half of its length;
  • the upper end of the envelope is folded on each side towards the inside of the bag thus defining two symmetrical folds, and the length of the non-welded part of the upper end is slightly greater than the length of the corresponding fold folded towards the inside, so that the outward deployment of this fold, forming a pouring spout, is always possible without risk of welding this fold with the upper end during the welding step;
  • the upper end of the bag is folded over it, and the adhesive strip connects the unwelded portion of the upper end and the top of the bag;
  • the bag is made of transparent food-grade polypropylene, but one can however envisage the use of another material, such as in particular polyethylene or any other heat-sealable packaging film;
  • the sachet is intended to contain dry and bulk food products.

L'invention concerne également un dispositif apte à permettre la fermeture de l'extrémité supérieure d'un tel sachet. Ce dispositif comprend fondamentalement une paire de mâchoires chauffantes, présentant une partie active dentée, dont la longueur correspond à la longueur de l'extrémité supérieure à souder, associée à une partie inactive dépourvue de tout élément denté, correspondant au moins à la longueur de l'extrémité supérieure non soudée.The invention also relates to a device able to allow the closure of the upper end of such a bag. This device basically comprises a pair of heating jaws, having an active toothed part, the length of which corresponds to the length of the upper end to be welded, associated with an inactive part devoid of any toothed element, corresponding at least to the length of the 'upper end not welded.

Avantageusement, la partie inactive reçoît une pièce rapportée en polytétrafluoroéthylène (PTFE), dont l'épaisseur correspond à celle de la partie active, et ce dans un but de pincement et de saisie de l'extrémité supérieure du sac lors de l'étape de soudure.Advantageously, the inactive part receives a polytetrafluoroethylene (PTFE) insert, the thickness of which corresponds to that of the active part, and this for the purpose of pinching and gripping the upper end of the bag during the step of welding.

La manière dont l'invention peut être réalisée et les avantages qui en découlent ressortiront mieux de l'exemple de réalisation qui suit, donné à titre indicatif mais non limitatif à l'appui des figures annexées.The manner in which the invention can be implemented and the advantages which result therefrom will emerge more clearly from the example of embodiment which follows, given as an indication but not limiting in support of the appended figures.

La figure 1 est une vue en perspective schématique d'un sachet fermé conforme à l'invention.Figure 1 is a schematic perspective view of a closed bag according to the invention.

La figure 2 est une vue schématique en perspective du même sachet dans lequel l'extrémité supérieure est partiellement ouverte.Figure 2 is a schematic perspective view of the same bag in which the upper end is partially open.

La figure 3 est une vue schématique en perspective du sachet conforme à l'invention dans lequel les plis correspondant à la zone de l'extrémité supérieure non soudée sont déployés vers l'extérieur afin de former bec verseur.Figure 3 is a schematic perspective view of the bag according to the invention in which the folds corresponding to the area of the upper end not welded are deployed outward to form the spout.

La figure 4 est une vue schématique en perspective du sachet fermé conforme à l'invention selon une forme perfectionnée de réalisation.Figure 4 is a schematic perspective view of the closed bag according to the invention according to an improved embodiment.

La figure 5 est une vue en plan d'un jeu de mâchoires chauffantes du dispositif conforme à l'invention en position opérationnelle.Figure 5 is a plan view of a set of heated jaws of the device according to the invention in the operational position.

La figure 6 est une vue similaire à celle de la figure 5, dans laquelle la partie inactive des mâchoires reçoît une pièce rapportée en PTFE.FIG. 6 is a view similar to that of FIG. 5, in which the inactive part of the jaws receives an insert made of PTFE.

De manière connue, les sachets en matière thermoscellable pour produits secs et en vrac sont réalisés à partir d'un film en matière thermoscellable que l'on positionne sur un conformateur de forme appropriée, propre à lui donner la forme parallélépipédique définitive du sachet. On procède tout d'abord à une soudure longitudinale bord à bord 4 des deux extrémités du film. Puis, on procède à la réalisation du fond du sachet par fermeture de l'extrémité inférieure 3 dudit parallélépipède, et ce, de manière connue par pincement entre deux mâchoires chauffantes, à une température au moins égale à la température de fusion de la matière plastique, avec simultanément la réalisation de plis diamétralement opposés, dirigés vers l'intérieur du sachet, en vue d'obtenir un fond relativement plat.In known manner, the bags of heat-sealable material for dry and bulk products are produced from a film of heat-sealable material which is positioned on a shaping device of appropriate shape, suitable for giving it the definitive parallelepiped shape of the bag. First, a longitudinal edge-to-edge weld 4 is made of the two ends of the film. Then, the bottom of the bag is produced by closing the lower end 3 of said parallelepiped, and this, in a known manner by pinching between two heating jaws, at a temperature at least equal to the melting point of the plastic material. , simultaneously with the production of diametrically opposite folds, directed towards the inside of the bag, in order to obtain a relatively flat bottom.

L'étape suivante concerne le remplissage du sachet, par exemple par le biais de doseuses qui, de manière connue, déversent dans le sachet une quantité prédéterminée et calibrée de produits en vrac.The next step concerns the filling of the sachet, for example by means of metering devices which, in known manner, pour into the sachet a predetermined and calibrated quantity of bulk products.

La phase suivante concerne la fermeture de l'extrémité supérieure 2 du sachet, une fois ce dernier rempli, réalisée de manière analogue à la réalisation du fond 3.The next phase concerns the closure of the upper end 2 of the bag, once it has been filled, carried out in a similar manner to the production of the bottom 3.

De manière avantageuse, et à l'exception du premier sachet d'une série, on réalise simultanément la fermeture de l'extrémité supérieure 2 d'un sachet 1 et la fermeture de l'extrémité inférieure 3 du sachet suivant. Pour ce faire, le poste de réalisation de cette opération est en fait un double poste, sur lequel le sachet supérieur est fermé à son extrémité inférieure 3 et reçoît le produit sec et en vrac d'une doseuse, et le sachet inférieur plein est fermé à son extrémité supérieure 2, l'opération supplémentaire de désolidarisation des deux sachets réalisés à partir du même film de matière thermoscellable étant effectuée entre les deux jeux de deux mâchoires de soudure au moyen d'un couteau, type guillotine. De fait, le sachet inférieur est donc rempli lorsqu'il est fermé et passe alors à l'étape suivante dite "de tassage", consistant à faire vibrer ledit sachet afin de tasser légèrement le produit en vrac dans le paquet. De la sorte, compte tenu de ces vibrations, un espace vide est généré à la partie supérieure du sachet, susceptible de permettre la réalisation d'une fermeture moins lâche du sachet.Advantageously, and with the exception of the first bag in a series, the upper end 2 of a bag 1 is closed simultaneously and the lower end 3 of the bag is closed. next bag. To do this, the station for carrying out this operation is in fact a double station, on which the upper bag is closed at its lower end 3 and receives the dry and bulk product from a metering device, and the full lower bag is closed at its upper end 2, the additional operation of separating the two sachets made from the same film of heat-sealable material being carried out between the two sets of two welding jaws by means of a knife, guillotine type. In fact, the lower sachet is therefore filled when it is closed and then passes to the next so-called "tamping" step, which consists in vibrating said sachet in order to slightly compact the bulk product in the package. In this way, given these vibrations, an empty space is generated at the upper part of the bag, capable of allowing a less loose closure of the bag.

Pour ce faire, une paire de mâchoires froides, destinées à réaliser les plis 7 au niveau de l'extrémité supérieure du sachet 1 au niveau de cet espace vide, viennent saisir le sachet au niveau de celui-ci, et simultanément, un couteau effectue une incision verticale afin de permettre à l'air contenu dans cet espace d'être libéré.To do this, a pair of cold jaws, intended to produce the folds 7 at the level of the upper end of the bag 1 at this empty space, come to grip the bag at the level of it, and simultaneously, a knife performs a vertical incision to allow the air in this space to be released.

La phase suivante correspond à la réalisation de la soudure définitive de l'extrémité supérieure 2 au moyen de mâchoires chaudes, la soudure s'effectuant sur au moins la moitié de la longueur 5 de ladite extrémité supérieure, mais toutefois inférieure à la zone de retrait de la partie pliée 7 située du côté de la partie non soudée, afin de s'affranchir de tout risque de soudure de cette dite partie pliée 7. En effet, cette partie pliée 7 joue ultérieurement le rôle de bec verseur par déploiement de celle-ci vers l'extérieur.The following phase corresponds to the completion of the final weld of the upper end 2 by means of hot jaws, the weld being effected over at least half of the length 5 of the said upper end, but nevertheless less than the withdrawal zone. of the folded part 7 situated on the side of the non-welded part, in order to overcome any risk of welding of this said folded part 7. In fact, this folded part 7 subsequently plays the role of pouring spout by deploying it- this outward.

L'étape suivante concerne alors la fermeture de la partie non soudée 6 de l'extrémité supérieure 2 au moyen d'une bande adhésive 8, collée par exemple au moyen de palpeurs sur ladite partie 6 jusqu'à la partie supérieure du sachet 1. De manière avantageuse, cette bande adhésive est munie sur sa partie collante de colle-transfert apte à permettre la refermeture du sachet après chaque utilisation. De plus, et afin de faciliter la préhension de cette bande, on ménage à l'une de ses extrémités une zone dépourvue de colle, et ce sur quelques millimètres.The next step then relates to the closing of the non-welded part 6 of the upper end 2 by means of an adhesive strip 8, glued for example by means of feelers on said part 6 to the upper part of the bag 1. Advantageously, this adhesive strip is provided on its sticky part with transfer glue capable of allowing the bag to be closed after each use. In addition, and in order to facilitate gripping of this strip, an area devoid of glue is provided at one of its ends, over a few millimeters.

Dans une autre forme de réalisation, la bande adhésive 8 est collée à titre définitif, l'ouverture du sachet s'effectuant par rupture de cette bande. Une fois la bande enlevée, ou déchirée, on sort la partie pliée 7 vers l'extérieur, de telle sorte à former bec verseur comme on peut le voir sur la figure 3. De la sorte, le versement du contenu du sachet 1 s'effectue de manière simple et aisée dans la direction voulue et en quantité voulue. Il n'y a plus de risque de dégradation ou de rupture anarchique du sachet.In another embodiment, the adhesive strip 8 is permanently glued, the opening of the bag being effected by rupture of this strip. Once the strip removed, or torn, we take out the part folded 7 outwards, so as to form a spout as can be seen in FIG. 3. In this way, the pouring of the contents of the sachet 1 is carried out in a simple and easy manner in the desired direction and in quantity wanted. There is no longer any risk of damage or uncontrolled rupture of the sachet.

La figure 4 représente une forme perfectionnée de réalisation de l'invention, dans laquelle la bande adhésive est constituée par une étiquette 80 qui recouvre la majeure partie du sommet du sachet 1 et qui comprend une bande longitudinale prédécoupée 81 disposée à cheval sur l'extrémité supérieure 2 du sachet 1.FIG. 4 represents an improved embodiment of the invention, in which the adhesive strip consists of a label 80 which covers most of the top of the bag 1 and which comprises a precut longitudinal strip 81 arranged astride the end upper 2 of bag 1.

L'étiquette 80 améliore l'aspect fini du sachet, peut porter diverses informations relatives au produit (et notamment un code à barres) et prévient tout risque de déchirement intempestif du sachet au niveau de l'extrémité 2.The label 80 improves the finished appearance of the sachet, can carry various information relating to the product (and in particular a bar code) and prevents any risk of untimely tearing of the sachet at the level of the end 2.

La bande 81 facilite l'ouverture du sachet 1. Elle comprend avantageusement un moyen permettant de faciliter son soulèvement et son déchirement, tel qu'une patte 81a faisant saillie de l'un des bords de l'étiquette 80.The strip 81 facilitates the opening of the bag 1. It advantageously comprises a means making it possible to facilitate its lifting and tearing, such as a tab 81a projecting from one of the edges of the label 80.

Le dispositif apte à permettre la réalisation de la fermeture selon l'invention est constitué, comme on peut mieux le voir sur la figure 5, de deux mâchoires 10 et 11 complémentaires, destinées à coopérer l'une avec l'autre. Chacune de ces deux mâchoires est munie d'une première zone 12 dite zone active dentée apte à permettre la réalisation de la soudure partielle de l'extrémité supérieure 5 du sachet 1, et une seconde zone 13 dite inactive, dépourvue de toute zone active afin de ne pas souder la partie correspondante 6 de l'extrémité supérieure 2 du sachet.The device capable of enabling the closure according to the invention to consist of, as can best be seen in FIG. 5, two complementary jaws 10 and 11, intended to cooperate with each other. Each of these two jaws is provided with a first zone 12 known as toothed active zone capable of allowing the partial welding of the upper end 5 of the bag 1, and a second zone 13 known as inactive, devoid of any active zone so not to weld the corresponding part 6 of the upper end 2 of the bag.

Dans une forme de réalisation avantageuse représentée à la figure 6, cette zone 13 est comblée par deux pièces 14, rapportées par tout moyen approprié sur les deux mâchoires 10 et 11, et réalisées en polytétrafluoroéthylène, mieux connue sous la marque déposée "TEFLON", et dont l'épaisseur totale de ces deux parties correspond à l'épaisseur de la partie active 12 des mâchoires 10 et 11. De la sorte, la totalité de l'extrémité supérieure 2 du sachet 1 est pincée pondant la phase de soudure, sans risque d'adhérer à cette partie 13. En outre, le choix du matériau utilisé pour cette partie est également dicté par les conditions de température appliquées auxdites mâchoires 10, 11.In an advantageous embodiment shown in FIG. 6, this area 13 is filled with two pieces 14, attached by any appropriate means to the two jaws 10 and 11, and made of polytetrafluoroethylene, better known under the registered trademark "TEFLON", and the total thickness of these two parts corresponds to the thickness of the active part 12 of the jaws 10 and 11. In this way, the entire upper end 2 of the bag 1 is pinched laying the welding phase, without risk of adhering to this part 13. In addition, the choice of material used for this part is also dictated by the temperature conditions applied to said jaws 10, 11.

De la sorte, les sachets conformes à l'invention s'avèrent d'un usage tout-à-fait aisé et d'ouverture également simple, permettant un versement rationnel du contenu. Il est donc tout-à-fait adapté pour tous les produits en vrac, tels que notamment les produits alimentaires, à condition d'utiliser une matière plastique à qualité alimentaire, telle que par exemple du polypropylène ou polyéthylène. Ce type de sachet est donc adapté pour des produits en vrac, pour lesquels la conservation sous vide n'est pas nécessaire. Ces produits peuvent être sous forme pulvérulente telle que notamment la farine, voire granuleuse ou autres, par exemple les pâtes, le riz, etc.In this way, the sachets according to the invention prove to be quite easy to use and also simple to open, allowing a rational payment of the contents. It is therefore entirely suitable for all bulk products, such as in particular food products, provided that a food-grade plastic material is used, such as for example polypropylene or polyethylene. This type of bag is therefore suitable for bulk products, for which vacuum storage is not necessary. These products can be in pulverulent form such as in particular flour, or even granular or others, for example pasta, rice, etc.

Claims (10)

1 - Sachet (1) pour produits secs en vrac constitué par une enveloppe parallélépipédique en matière thermoscellable soudée à ses deux extrémités, respectivement supérieure (2) et inférieure (3), caractérisé : - en ce que l'extrémité supérieure (2) est soudée sur une partie (5) seulement de sa longueur ; - et en ce que la partie non soudée (6) de cette extrémité est fermée par une bande adhésive (8). 1 - Bag (1) for dry bulk products consisting of a parallelepipedic envelope of heat-sealable material welded at its two ends, respectively upper (2) and lower (3), characterized: - in that the upper end (2) is welded over only part (5) of its length; - And in that the non-welded part (6) of this end is closed by an adhesive strip (8). 2 - Sachet selon la revendication 1, caractérisé en ce que la partie soudée (5) s'étend sur la moitié au moins de la longueur de l'extrémité supérieure (2). 2 - Bag according to claim 1, characterized in that the welded part (5) extends over at least half the length of the upper end (2). 3 - Sachet selon l'une des revendications 1 et 2, caractérisé en ce que l'extrémité supérieure (2) de l'enveloppe est repliée de chaque côté vers l'intérieur du sachet (1), afin de former deux plis symétriques (7) et en ce que la portion non soudée (6) est légèrement supérieure à la longueur du pli correspondant dirigé vers l'intérieur du sachet (1), destiné lorsqu'il est déployé vers l'extérieur, à former bec verseur. 3 - Bag according to one of claims 1 and 2, characterized in that the upper end (2) of the envelope is folded on each side towards the inside of the bag (1), in order to form two symmetrical folds ( 7) and in that the non-welded portion (6) is slightly greater than the length of the corresponding fold directed towards the inside of the bag (1), intended when it is deployed towards the outside, to form a spout. 4 - Sachet selon l'une des revendications 1 à 3, caractérisé en ce que la partie supérieure (2) est repliée sur le sachet (1), la bande adhésive (8) reliant la portion non soudée (5) et le dessus du sachet (1). 4 - Bag according to one of claims 1 to 3, characterized in that the upper part (2) is folded over the bag (1), the adhesive strip (8) connecting the non-welded portion (5) and the top of the bag (1). 5 - Sachet selon l'une des revendications 1 à 3, caractérisé en ce que la bande adhésive (8) est constituée par une étiquette (80) qui recouvre la majeure partie du sommet du sachet (1) et qui comprend une bande longitudinale prédécoupée (81) disposée à cheval sur l'extrémité supérieure (2) du sachet (1). 5 - Bag according to one of claims 1 to 3, characterized in that the adhesive strip (8) is constituted by a label (80) which covers most of the top of the bag (1) and which comprises a precut longitudinal strip (81) arranged astride the upper end (2) of the bag (1). 6 - Sachet selon la revendication 5, caractérisé en ce que la bande (81) comprend un moyen (81a) permettant de faciliter son soulèvement et son déchirement. 6 - Bag according to claim 5, characterized in that the strip (81) comprises means (81a) to facilitate its lifting and tearing. 7 - Sachet selon l'une des revendications 1 à 6, caractérisé en ce qu'il est réalisé en polypropylène transparent à qualité alimentaire. 7 - Bag according to one of claims 1 to 6, characterized in that it is made of transparent polypropylene food grade. 8 - Sachet selon la revendication 7, caractérisé en ce qu'il contient des produits alimentaires secs en vrac. 8 - Bag according to claim 7, characterized in that it contains dry bulk food products. 9 - Dispositif pour assurer la fermeture de l'extrémité supérieure (2) du sachet (1) conforme à l'une des revendications 1 à 8, caractérisé en ce qu'il comprend des mâchoires chauffantes (10) et (11) présentant une partie active dentée (12), associée à une partie inactive (13) dépourvue de dents, dont la longueur correspond à celle de la partie non soudée (6). 9 - Device for closing the upper end (2) of the bag (1) according to one of claims 1 to 8, characterized in that it comprises heating jaws (10) and (11) having a toothed active part (12), associated with an inactive part (13) devoid of teeth, the length of which corresponds to that of the non-welded part (6). 10 - Dispositif selon la revendication 9, caractérisé en ce que la partie inactive (13) reçoît une pièce rapportée réalisée en polytétrafluoroéthylène (PTFE) d'épaisseur égale à celle de la partie active dentée (12). 10 - Device according to claim 9, characterized in that the inactive part (13) receives an insert made of polytetrafluoroethylene (PTFE) of thickness equal to that of the toothed active part (12).
EP91420115A 1990-04-05 1991-04-04 Bag made of heat sealable material and means for insuring its repeated closure Expired - Lifetime EP0451069B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91420115T ATE91992T1 (en) 1990-04-05 1991-04-04 BAG MADE OF HEAT-SEALABLE MATERIAL AND DEVICE FOR REPEATABLE SEALING OF THE BAG.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004628 1990-04-05
FR9004628A FR2660629B1 (en) 1990-04-05 1990-04-05 BAG IN THERMOSCELLABLE MATERIAL FOR BULK PRODUCTS AND DEVICE FOR ENSURING ITS REPEATED CLOSURE.

Publications (2)

Publication Number Publication Date
EP0451069A1 true EP0451069A1 (en) 1991-10-09
EP0451069B1 EP0451069B1 (en) 1993-07-28

Family

ID=9395648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420115A Expired - Lifetime EP0451069B1 (en) 1990-04-05 1991-04-04 Bag made of heat sealable material and means for insuring its repeated closure

Country Status (6)

Country Link
EP (1) EP0451069B1 (en)
AT (1) ATE91992T1 (en)
CA (1) CA2039286A1 (en)
DE (1) DE69100194T2 (en)
ES (1) ES2043455T3 (en)
FR (1) FR2660629B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517566A1 (en) * 1991-06-03 1992-12-09 Compagnie Gervais-Danone Opening and closing device for thin film flexible package
FR2692393A1 (en) * 1992-06-12 1993-12-17 Omapi Composite adhesive label with integral lifting strip - comprises front sheet with adhesive layer on one surface, removably attached to cover sheet with intermediate plastics strip for detachment
EP0608451A1 (en) * 1993-01-27 1994-08-03 Rovema Verpackungsmaschinen Gmbh Folding bag
EP0629990A1 (en) * 1993-06-17 1994-12-21 Société Anonyme: OMAPI Adhesive label and method of manufacture thereof
FR2847234A1 (en) * 2002-11-18 2004-05-21 Cetec Ind Conditionnement Bag with quick opening and repositionable closure has folded over top with perforated line to form pouring spout reclosable by adhesive label

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212698A (en) * 1964-05-08 1965-10-19 Cello Foil Products Inc Easy opening resealable bag
US4066167A (en) * 1976-07-08 1978-01-03 Keebler Company Recloseable package
US4332344A (en) * 1980-02-08 1982-06-01 Strodthoff Glenn G Resealable package

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867226A (en) * 1971-11-24 1975-02-18 Joseph J Guido Method for sealing plastic bags

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212698A (en) * 1964-05-08 1965-10-19 Cello Foil Products Inc Easy opening resealable bag
US4066167A (en) * 1976-07-08 1978-01-03 Keebler Company Recloseable package
US4332344A (en) * 1980-02-08 1982-06-01 Strodthoff Glenn G Resealable package

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517566A1 (en) * 1991-06-03 1992-12-09 Compagnie Gervais-Danone Opening and closing device for thin film flexible package
FR2692393A1 (en) * 1992-06-12 1993-12-17 Omapi Composite adhesive label with integral lifting strip - comprises front sheet with adhesive layer on one surface, removably attached to cover sheet with intermediate plastics strip for detachment
EP0608451A1 (en) * 1993-01-27 1994-08-03 Rovema Verpackungsmaschinen Gmbh Folding bag
EP0629990A1 (en) * 1993-06-17 1994-12-21 Société Anonyme: OMAPI Adhesive label and method of manufacture thereof
FR2847234A1 (en) * 2002-11-18 2004-05-21 Cetec Ind Conditionnement Bag with quick opening and repositionable closure has folded over top with perforated line to form pouring spout reclosable by adhesive label

Also Published As

Publication number Publication date
ES2043455T3 (en) 1993-12-16
DE69100194T2 (en) 1994-01-27
ATE91992T1 (en) 1993-08-15
DE69100194D1 (en) 1993-09-02
FR2660629B1 (en) 1992-08-14
CA2039286A1 (en) 1991-10-06
FR2660629A1 (en) 1991-10-11
EP0451069B1 (en) 1993-07-28

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