WO1998057863A1 - Bag comprising a closing device with matching sections and closing device therefor - Google Patents

Bag comprising a closing device with matching sections and closing device therefor Download PDF

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Publication number
WO1998057863A1
WO1998057863A1 PCT/FR1998/001248 FR9801248W WO9857863A1 WO 1998057863 A1 WO1998057863 A1 WO 1998057863A1 FR 9801248 W FR9801248 W FR 9801248W WO 9857863 A1 WO9857863 A1 WO 9857863A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
ribs
bag
fixing rib
closure device
Prior art date
Application number
PCT/FR1998/001248
Other languages
French (fr)
Inventor
Henri Georges Bois
Original Assignee
Flexico-France
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 Flexico-France filed Critical Flexico-France
Priority to NZ334178A priority Critical patent/NZ334178A/en
Priority to CA002263371A priority patent/CA2263371A1/en
Priority to AT98932203T priority patent/ATE248756T1/en
Priority to DE69817748T priority patent/DE69817748T2/en
Priority to EP98932203A priority patent/EP0925229B1/en
Priority to AU82187/98A priority patent/AU728260B2/en
Priority to BR9806226A priority patent/BR9806226A/en
Publication of WO1998057863A1 publication Critical patent/WO1998057863A1/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
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • B65D33/255—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape being provided with special visual, audible or tactile indicating means, e.g. indicating proper engagement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape

Definitions

  • Bag comprising a closure device formed of complementary profiles and closure device for this purpose
  • the present invention is in the field of sachets comprising plastic closure devices. More particularly, the invention relates to closure devices fixed by welding to a bag wall.
  • each profile comprises a base intended to be fixed to the wall of the bag and at least one closure element projecting from said base.
  • Each profile is fixed to the wall of the bag, so that each closure element of a profile is opposite a closure element of the other profile which is complementary thereto.
  • Devices which, to facilitate welding of the base to the wall, have a base provided with ribs.
  • patent FR 2 613 326 describes separable closure profiles provided with several fusible ribs, of rectangular cross section, having a mass sufficient to provide a molten bonding layer between the profile and the wall of the bag.
  • welding is sometimes difficult, reducing the effectiveness of the fixing and causing deformations of the profile, hindering the good cooperation of the closure elements.
  • the object of the invention is to provide an improvement to the welding ribs of the closure profiles, on bag walls.
  • the invention is a plastic bag provided with a separable and reclosable closure device consisting of two sections, each section consisting of a base provided, on one side, with a closure element, capable of cooperating with that of the other profile and, on the opposite face, of at least one fixing rib of the base on a wall of a bag, by melting and crushing of the fixing rib on said wall, characterized in that the rib has a cross section whose width increases from the free end towards the base.
  • the width of the contact zone between the rib and the wall of the bag is therefore variable and depends on the quality of the welding.
  • This rib profile has the advantage of being tolerant with respect to variations in the welding pressure of the profile on the film of the bag. Indeed, if the welding pressure is low, the force on the tip is nevertheless sufficient to give an effective weld. On the other hand, the higher the pressure, the larger the welding surface, thus imposing an even higher back pressure. This effect makes it possible to avoid crossing the total thickness of the film constituting the wall of the bag.
  • a pigment is introduced into the mass of the plastic, at least at the ribs.
  • the wall of the bag is translucent or transparent, a more or less colored band appears at the level of the fixing of the profiles.
  • the width and the intensity of the color of this strip are then a function of the importance of the region of the rib having fused with the support.
  • the quality of the fixing can be checked optically after welding.
  • asymmetrical coloring of the ribs on either side of the closure elements allows the manipulator to identify the direction in which the profile must be placed relative to the opening of the bag.
  • the closure element must have a high resistance to the internal pressure of the contents of the sachet.
  • the same element must be able to be opened easily by the user and therefore have less resistance to external pressure.
  • the closure elements have an asymmetry which must be identifiable during the step of welding the profile to the wall of the bag.
  • Figure 1 is a perspective view of a closure device according to the invention, with its separate closure elements, before welding of the ribs on the walls of the bag.
  • Figure 2 is a perspective view of a closure device according to the invention, with its nested closure elements, after welding of the ribs on the walls of the bag.
  • Figure 3 is a series of cross sections of a triangular rib, to illustrate the interest of pigmentation in the mass.
  • FIG 4 is a schematic representation of a bag closure device according to the invention, in a die, between two guides of a certain type.
  • Figure 5 is a schematic representation of a bag closure device according to the invention, between two guides of another type.
  • a closure device 1 e n plastic consisting of two sections 2.
  • Each section 2 consists of a base 3.
  • Each base 3 is a flat strip of rectangular section.
  • the internal face is provided with at least one closing element 4.
  • the external face is provided with at least one fixing rib 5 of the profile 2 on a bag wall 10.
  • Each closing element 4 is parallel to the edge of the '' base 3.
  • the closure elements 4 of each profile 2 are able to cooperate with each other to make the two profiles 2 integral with one another. These closing elements can be fitted into one another and separated reversibly.
  • one of the closing elements 4 is represented by an arrow which symbolizes a male element.
  • the other closing element 4 is represented by an open cylinder, which symbolizes a female element.
  • these elements are of any known form, capable of ensuring the closing function by nesting the male element in the female element.
  • this closure is hermetic.
  • Each fixing rib 5 is parallel to the edge of the base 3.
  • Each fixing rib 5 has a cross section whose width increases from the free end towards the base 3.
  • this section is generally triangular. The triangle thus defined is isosceles or even equilateral. If it is isosceles, neither of the two sides of the same length coincides with the base 3.
  • Each rib 5 can be arranged on the base 3 in several ways. For example and preferably, if there are two ribs 5 per profile 2, they are each located near a longitudinal edge S of the base 3, on the face of the base 3 opposite to that carrying the element 4.
  • this embodiment is not limiting and it is also possible to envisage a single rib 5 per profile 2, just like three or four ribs 5 per profile 2, or even more. In this case, two of them are each located for example, near a longitudinal edge 8 of the base 3.
  • the amount of material of the ribs 5 subjected to crushing during welding can be variable.
  • the triangular shape of the ribs 5 allows direct visual control of the quality of the weld obtained.
  • the plastic, and in particular that of the ribs 5, of the closure device 1 can be dyed in the mass with pigments.
  • This improvement makes it possible to view the width 1 of the weld surface 6 by transparency, through the wall of the bag 10.
  • Pigmentation can be obtained with any type of pigment.
  • the pigment concentration can be less than 1% by weight.
  • the amount of pigment accumulated on the surface of the weld 6 is greater if the tip 7 of the rib 5 is crushed over a greater height h (FIG. 3).
  • the quality of the welding can be controlled optically, not only by virtue of the width 1 of the surface of the weld 6, but also thanks to the intensity of the color of the weld 6.
  • each profile 2 can have the following dimensions:
  • Profile 2 can be made with different types of polymers. These polymers can in particular be a polyolefin or a mixture of polyolefins.
  • the base 3 and the closure elements can be made of any polymer having mechanical characteristics making it possible to ensure good resistance of the closure.
  • This polymer can be, for example, a low, medium or high density polyolefin.
  • the ribs 5 can be made of any polymer having good weldability characteristics and which can be coextruded with the material of the base 2.
  • This polymer can be, for example, a polyolefin such as linear polyolefins, EVA, of metalocene, etc. .
  • the material constituting the ribs 5 may be different from that constituting the closure elements 4 and the base 3.
  • the material constituting the ribs has a melting point lower than that constituting the elements closure 4 and base 3.
  • the ribs 5 have a geometry and a position. on the base 3 which allow all of the two profiles 2 of the closure device 1 to deform in order to have a reduced space requirement between the guides 21 of said dies 20 (FIG. 4). More precisely, the sum of the widths L of the external faces 7 of the ribs 5 is approximately less than or equal to the thickness E of the assembly of the two sections 2 in line with the closing elements 4, when said elements 4 are nested one in the other.
  • the ribs 5 make it possible to precisely wedge the profiles 2, in said dies 30, between guide elements 31 , blades or rollers (Figure 5).
  • the width of the base 3 between the bases of the internal faces 7 ′ of the ribs 5 is approximately complementary to the width of the guide elements 31.

Abstract

The invention concerns a plastic bag provided with a detachable closing device (1) capable of being closed tight, consisting of two sections (2), each section (2) being made up of a seat (3) provided, on one face, with a closing element (4), co-operating with that of the other section (2) and, on the opposite face, with at least a raised band (5) for fixing the seat (3) on one surface of the bag (10), by melting and pressing the fixing band (5) on said surface (10), characterised in that the fixing band (5) has a transverse cross-section the length of which increases from the free end towards the seat (3).

Description

Sachet comprenant un dispositif de fermeture formé de profilés complémentaires et dispositif de fermeture à cet effet Bag comprising a closure device formed of complementary profiles and closure device for this purpose
La présente invention se situe dans le domaine des sachets comprenant des dispositifs de fermeture en matière plastique. Plus particulièrement, l'invention concerne des dispositifs de fermeture fixés par soudage sur une paroi de sachet.The present invention is in the field of sachets comprising plastic closure devices. More particularly, the invention relates to closure devices fixed by welding to a bag wall.
On a déjà proposé de nombreux sachets comprenant un dispositif de fermeture comprenant deux profilés. Dans un tel dispositif, chaque profilé comprend une embase destinée à être fixée sur la paroi du sachet et au moins un élément de fermeture faisant saillie sur ladite embase. Chaque profilé est fixé sur la paroi du sachet, de manière à ce que chaque élément de fermeture d'un profilé soit en face d'un élément de fermeture de l'autre profilé qui lui est complémentaire. On connaît des dispositifs qui, pour faciliter le soudage de l'embase sur la paroi, ont une embase munie de nervures.Many bags have already been proposed comprising a closure device comprising two sections. In such a device, each profile comprises a base intended to be fixed to the wall of the bag and at least one closure element projecting from said base. Each profile is fixed to the wall of the bag, so that each closure element of a profile is opposite a closure element of the other profile which is complementary thereto. Devices are known which, to facilitate welding of the base to the wall, have a base provided with ribs.
Ainsi le brevet FR 2 613 326 décrit des profilés de fermeture séparables munis de plusieurs nervures fusibles, de section transversale rectangulaire, ayant une masse suffisante pour fournir une couche de liaison fondue entre le profilé et la paroi du sachet. Cependant, avec ce type de nervures, le soudage est parfois difficile, réduisant l'efficacité de la fixation et provoquant des déformations du profilé, nuisant à la bonne coopération des éléments de fermeture.Thus, patent FR 2 613 326 describes separable closure profiles provided with several fusible ribs, of rectangular cross section, having a mass sufficient to provide a molten bonding layer between the profile and the wall of the bag. However, with this type of ribs, welding is sometimes difficult, reducing the effectiveness of the fixing and causing deformations of the profile, hindering the good cooperation of the closure elements.
Le but de l'invention est d'apporter un perfectionnement aux nervures de soudage des profilés de fermeture, sur des parois de sachet.The object of the invention is to provide an improvement to the welding ribs of the closure profiles, on bag walls.
L'invention est un sachet en matière plastique muni d'u n dispositif de fermeture séparable et refermable constitué de deux profilés, chaque profilé étant constitué d'une embase pourvue, sur une face, d'un élément de fermeture, apte à coopérer avec celui de l'autre profilé et, sur la face opposée, d'au moins une nervure de fixation de l'embase sur une paroi de sachet, par fusion et écrasement de la nervure de fixation sur ladite paroi, caractérisé en ce que la nervure a une section transverse dont la largeur croît de l'extrémité libre vers l'embase.The invention is a plastic bag provided with a separable and reclosable closure device consisting of two sections, each section consisting of a base provided, on one side, with a closure element, capable of cooperating with that of the other profile and, on the opposite face, of at least one fixing rib of the base on a wall of a bag, by melting and crushing of the fixing rib on said wall, characterized in that the rib has a cross section whose width increases from the free end towards the base.
Après fusion et écrasement, la pointe de la nervure est aplatie. La largeur de la zone de contact entre la nervure et la paroi du sachet est donc variable et fonction de la qualité du soudage.After fusion and crushing, the point of the rib is flattened. The width of the contact zone between the rib and the wall of the bag is therefore variable and depends on the quality of the welding.
Ce profil de nervure présente l'avantage d'être tolérant vis à vis des variations de pression de soudage du profilé sur le film du sachet. En effet, si la pression de soudage est faible, la force sur la pointe est néanmoins suffisante pour donner une soudure efficace. Par contre, plus la pression est forte, plus la surface de soudure est grande, imposant ainsi une contre pression d'autant plus élevée. Cet effet permet d'éviter la traversée de l'épaisseur totale du film constituant la paroi du sachet.This rib profile has the advantage of being tolerant with respect to variations in the welding pressure of the profile on the film of the bag. Indeed, if the welding pressure is low, the force on the tip is nevertheless sufficient to give an effective weld. On the other hand, the higher the pressure, the larger the welding surface, thus imposing an even higher back pressure. This effect makes it possible to avoid crossing the total thickness of the film constituting the wall of the bag.
Dans une réalisation avantageuse de l' invention, un pigment est introduit dans la masse de là matière plastique, au moins au niveau des nervures.In an advantageous embodiment of the invention, a pigment is introduced into the mass of the plastic, at least at the ribs.
Aussi, si la paroi du sachet est translucide ou transparente, il apparaît une bande plus ou moins colorée au niveau de la fixation des profilés. La largeur et l'intensité de la couleur de cette bande sont alors fonction de l'importance de la région de la nervure ayant fusionné avec le support. Ainsi, la qualité de la fixation peut être contrôlée optiquement après soudage.Also, if the wall of the bag is translucent or transparent, a more or less colored band appears at the level of the fixing of the profiles. The width and the intensity of the color of this strip are then a function of the importance of the region of the rib having fused with the support. Thus, the quality of the fixing can be checked optically after welding.
De plus, une coloration dissymétrique des nervures de part et d'autre des éléments de fermeture permet au manipulateur de repérer le sens, dans lequel le profilé doit être placé par rapport à l'ouverture du sachet. En effet, l'élément de fermeture doit avoir une grande résistance à la pression interne du contenu du sachet. Par contre, le même élément doit pouvoir être ouvert facilement par l'utilisateur et donc avoir une moindre résistance à la pression externe. Pour répondre à ces exigences, les éléments de fermeture présentent une dissymétrie qui doit pouvoir être repérée lors de l'étape de soudage du profilé sur la paroi du sachet. Les sachets selon l'invention sont décrits ci-après à l'aide d' u n exemple non limitatif et avec des références aux dessins joints dans lesquels :In addition, asymmetrical coloring of the ribs on either side of the closure elements allows the manipulator to identify the direction in which the profile must be placed relative to the opening of the bag. Indeed, the closure element must have a high resistance to the internal pressure of the contents of the sachet. On the other hand, the same element must be able to be opened easily by the user and therefore have less resistance to external pressure. To meet these requirements, the closure elements have an asymmetry which must be identifiable during the step of welding the profile to the wall of the bag. The bags according to the invention are described below with the aid of a nonlimiting example and with reference to the accompanying drawings in which:
La figure 1 est une vue perspective d' un dispositif de fermeture selon l'invention, avec ses éléments de fermeture séparés, avant soudage des nervures sur les parois du sachet.Figure 1 is a perspective view of a closure device according to the invention, with its separate closure elements, before welding of the ribs on the walls of the bag.
La figure 2 est une vue perspective d'un dispositif de fermeture selon l'invention, avec ses éléments de fermeture imbriqués, après soudage des nervures sur les parois du sachet. La figure 3 est une série de coupes transverses d'une nervure triangulaire, pour illustrer l'intérêt de la pigmentation dans la masse.Figure 2 is a perspective view of a closure device according to the invention, with its nested closure elements, after welding of the ribs on the walls of the bag. Figure 3 is a series of cross sections of a triangular rib, to illustrate the interest of pigmentation in the mass.
La figure 4 est une représentation schématique d'un dispositif de fermeture de sachet selon l'invention, dans une filière, entre deux guides d'un certain type. La figure 5 est une représentation schématique d'un dispositif de fermeture de sachet selon l'invention, entre deux guides d'un autre type. La description détaillée qui suit décrit un mode de réalisation particulier mais non limitatif des sachets et du dispositif de fermeture selon l'invention. Sur la figure 1 est représenté un dispositif de fermeture 1 e n matière plastique, constitué de deux profilés 2. Chaque profilé 2 est constitué d'une embase 3. Chaque embase 3 est une bande aplatie de section rectangulaire.Figure 4 is a schematic representation of a bag closure device according to the invention, in a die, between two guides of a certain type. Figure 5 is a schematic representation of a bag closure device according to the invention, between two guides of another type. The detailed description which follows describes a particular but non-limiting embodiment of the sachets and of the closure device according to the invention. In Figure 1 is shown a closure device 1 e n plastic, consisting of two sections 2. Each section 2 consists of a base 3. Each base 3 is a flat strip of rectangular section.
Elle a une face principale interne et une face principale externe. Les faces internes sont en vis à vis, lorsque le dispositif de fermeture 1 est opérationnellement en place sur une paroi de sachet 10.It has an internal main face and an external main face. The internal faces are opposite, when the closure device 1 is operationally in place on a wall of a bag 10.
La face interne est munie d'au moins un élément de fermeture 4. La face externe est munie d'au moins une nervure de fixation 5 du profilé 2 sur une paroi de sachet 10. Chaque élément de fermeture 4 est parallèle au bord de l'embase 3. Les éléments de fermeture 4 de chaque profilé 2 sont aptes à coopérer entre eux pour rendre les deux profilés 2 solidaires l'un de l'autre. Ces éléments de fermeture peuvent être emboîtés l'un dans l'autre et séparés de manière réversible. Sur les figures 1 et 2, l'un des éléments de fermeture 4 est représenté par une flèche qui symbolise un élément mâle. L'autre élément de fermeture 4 est représenté par un cylindre ouvert, qui symbolise un élément femelle. Ces éléments sont de n'importe quelle forme connue, apte à assurer la fonction de fermeture par imbrication de l'élément mâle dans l'élément femelle. Préférentiellement, cette fermeture est hermétique.The internal face is provided with at least one closing element 4. The external face is provided with at least one fixing rib 5 of the profile 2 on a bag wall 10. Each closing element 4 is parallel to the edge of the '' base 3. The closure elements 4 of each profile 2 are able to cooperate with each other to make the two profiles 2 integral with one another. These closing elements can be fitted into one another and separated reversibly. In FIGS. 1 and 2, one of the closing elements 4 is represented by an arrow which symbolizes a male element. The other closing element 4 is represented by an open cylinder, which symbolizes a female element. These elements are of any known form, capable of ensuring the closing function by nesting the male element in the female element. Preferably, this closure is hermetic.
Chaque nervure de fixation 5 est parallèle au bord de l'embase 3.Each fixing rib 5 is parallel to the edge of the base 3.
Chaque nervure de fixation 5 a une section transversale dont la largeur croît de l'extrémité libre vers l'embase 3. Préférentiellement, cette section est globalement triangulaire. Le triangle ainsi défini est isocèle voire équilatéral. S'il est isocèle, aucun des deux côtés de même longueur ne coïncide avec l'embase 3.Each fixing rib 5 has a cross section whose width increases from the free end towards the base 3. Preferably, this section is generally triangular. The triangle thus defined is isosceles or even equilateral. If it is isosceles, neither of the two sides of the same length coincides with the base 3.
Chaque nervure 5 peut être disposée sur l'embase 3 de plusieurs façons. Par exemple et préférentiellement, s'il y a deux nervures 5 par profilé 2, elles sont chacune située à proximité d'un bord longitudinal S de l'embase 3, sur la face de l'embase 3 opposée à celle portant l'élément 4.Each rib 5 can be arranged on the base 3 in several ways. For example and preferably, if there are two ribs 5 per profile 2, they are each located near a longitudinal edge S of the base 3, on the face of the base 3 opposite to that carrying the element 4.
Mais ce mode de réalisation n'est pas limitatif et on peut aussi envisager une seule nervure 5 par profilé 2, tout comme trois ou quatre nervures 5 par profilé 2, voire plus. Dans ce cas, deux d'entre elles sont chacune située par exemple, à proximité d'un bord longitudinal 8 de l'embase 3.However, this embodiment is not limiting and it is also possible to envisage a single rib 5 per profile 2, just like three or four ribs 5 per profile 2, or even more. In this case, two of them are each located for example, near a longitudinal edge 8 of the base 3.
La quantité de matière des nervures 5 soumise à écrasement au cours du soudage peut être variable. Plus les opérations de fusion et écrasement des nervures 5 sont efficaces, plus large est la surface de la soudure 6 (figure 3). Ainsi, la forme triangulaire des nervures 5 permet un contrôle visuel direct de la qualité de la soudure obtenue.The amount of material of the ribs 5 subjected to crushing during welding can be variable. The more effective the operations of fusion and crushing of the ribs 5, the larger the surface of the solder 6 (Figure 3). Thus, the triangular shape of the ribs 5 allows direct visual control of the quality of the weld obtained.
Selon une variante avantageuse mais non limitative de l'invention, la matière plastique, et en particulier celle des nervures 5, du dispositif de fermeture 1 peut être teintée dans la masse par des pigments. Cette amélioration permet de visualiser la largeur 1 de la surface de soudure 6 par transparence, au travers de la paroi de sachet 10. La pigmentation peut être obtenue avec tout type de pigment. La concentration en pigment peut être inférieure à 1% en poids. De plus, la quantité de pigment accumulée à la surface de la soudure 6, est plus grande si la pointe 7 de la nervure 5 est écrasée sur une plus grande hauteur h (figure 3). Ainsi, on peut contrôler la qualité du soudage optiquement, non seulement grâce à la largeur 1 de la surface de la soudure 6, mais aussi grâce à l'intensité de la couleur de la soudure 6.According to an advantageous but nonlimiting variant of the invention, the plastic, and in particular that of the ribs 5, of the closure device 1 can be dyed in the mass with pigments. This improvement makes it possible to view the width 1 of the weld surface 6 by transparency, through the wall of the bag 10. Pigmentation can be obtained with any type of pigment. The pigment concentration can be less than 1% by weight. In addition, the amount of pigment accumulated on the surface of the weld 6 is greater if the tip 7 of the rib 5 is crushed over a greater height h (FIG. 3). Thus, the quality of the welding can be controlled optically, not only by virtue of the width 1 of the surface of the weld 6, but also thanks to the intensity of the color of the weld 6.
Pour repérer plus facilement la dissymétrie des profilés 2 vis à vis des résistances à la pression interne et à la force d'ouverture des sachets 10, les nervures 5 peuvent être teintées de manière différente de part et d'autre des éléments de fermeture 4. A titre d'exemple illustratif mais non limitatif, chaque profilé 2 peut avoir les dimensions suivantes :To more easily identify the asymmetry of the profiles 2 with respect to the resistance to internal pressure and to the opening force of the bags 10, the ribs 5 can be tinted differently on either side of the closure elements 4. By way of illustrative but nonlimiting example, each profile 2 can have the following dimensions:
- largeur de l'embase 3, entre les deux bords longitudinaux 8, de l'ordre de 8 mm ;- width of the base 3, between the two longitudinal edges 8, of the order of 8 mm;
.- épaisseur E, au droit des éléments de fermeture 4, de l'ensemble des deux profilés 2, lorsque lesdits éléments de fermeture 4 sont en prise l'un avec l'autre, de l'ordre de 2 mm ;.- thickness E, in line with the closure elements 4, of the assembly of the two sections 2, when said closure elements 4 are engaged with one another, of the order of 2 mm;
- largeur de la base des nervures 5, commune avec l'embase 3, de l'ordre de 1 à 2 mm ;- width of the base of the ribs 5, common with the base 3, of the order of 1 to 2 mm;
- distance entre le bord longitudinal 8 de l'embase 3, et le bord de la nervure 5, le plus proche dudit bord longitudinal 8, dé l'ordre de 0 à 1 mm. Le profilé 2 peut être réalisé avec différents types de polymères. Ces polymères peuvent être en particulier une polyoléfine ou un mélange de polyoléfines.- Distance between the longitudinal edge 8 of the base 3, and the edge of the rib 5, closest to said longitudinal edge 8, of the order of 0 to 1 mm. Profile 2 can be made with different types of polymers. These polymers can in particular be a polyolefin or a mixture of polyolefins.
L'embase 3 et les éléments de fermeture peuvent être réalisés dans tout polymère présentant des caractéristiques mécaniques permettant d'assurer une bonne tenue de la fermeture. Ce polymère peut être, par exemple, une polyoléfine à basse, moyenne ou haute densité.The base 3 and the closure elements can be made of any polymer having mechanical characteristics making it possible to ensure good resistance of the closure. This polymer can be, for example, a low, medium or high density polyolefin.
Les nervures 5 peuvent être réalisées dans tout polymère présentant de bonnes caractéristiques de soudabilité et pouvant être coextrudée avec le matériau de l'embase 2. Ce polymère peut être, par exemple, une polyoléfine telle que des polyoléfines linéaires, EVA, de métalocène, etc.The ribs 5 can be made of any polymer having good weldability characteristics and which can be coextruded with the material of the base 2. This polymer can be, for example, a polyolefin such as linear polyolefins, EVA, of metalocene, etc. .
En particulier et de manière préférentielle, le matériau constitutif des nervures 5 peut être différent de celui constitutif des éléments de fermeture 4 et de l'embase 3. Très préférentiellement, le matériau constitutif des nervures a un point de fusion inférieur à celui constitutif des éléments de fermeture 4 et de l'embase 3.In particular and preferably, the material constituting the ribs 5 may be different from that constituting the closure elements 4 and the base 3. Very preferably, the material constituting the ribs has a melting point lower than that constituting the elements closure 4 and base 3.
Afin de faciliter l'introduction et le passage des profilés 2 dans certaines filières 20 d'extrudeuses ou d'autres sous-ensembles de machines de formation ou d'assemblage de sachets, il est préférable que les nervures 5 présentent une géométrie et une position sur l'embase 3 qui permettent à l'ensemble des deux profilés 2 du dispositif de fermeture 1 de se déformer afin d'avoir un encombrement réduit à l'espace entre les guides 21 desdites filières 20 (figure 4). Plus précisément, la somme des largeurs L des faces externes 7 des nervures 5 est approximativement inférieure ou égale à l'épaisseur E de l'ensemble des deux profilés 2 au droit des éléments de fermeture 4, lorsque lesdits éléments 4 sont imbriqués l'un dans l'autre. De cette manière, on peut obtenir un état déformé des profilés 2, pour lequel la surface formée par la face externe 9 de l'embase 3 entre les nervures 5 e les faces internes 7' des nervures 5, est globalement plane. Dans d'autres types de filières 30 ou d'autres sous-ensembles de machines de formation ou d'assemblage de sachets, les nervures 5 permettent de caler avec précision, les profilés 2, dans lesdites filières 30, entre des éléments de guidage 31, lames ou roulettes (figure 5). Pour cela, la largeur de l'embase 3 entre les bases des faces internes 7' des nervures 5 est approximativement complémentaire de la largeur des éléments de guidage 31. In order to facilitate the introduction and the passage of the profiles 2 in certain dies of extruders or other subsets of machines for forming or assembling sachets, it is preferable that the ribs 5 have a geometry and a position. on the base 3 which allow all of the two profiles 2 of the closure device 1 to deform in order to have a reduced space requirement between the guides 21 of said dies 20 (FIG. 4). More precisely, the sum of the widths L of the external faces 7 of the ribs 5 is approximately less than or equal to the thickness E of the assembly of the two sections 2 in line with the closing elements 4, when said elements 4 are nested one in the other. In this way, it is possible to obtain a deformed state of the profiles 2, for which the surface formed by the external face 9 of the base 3 between the ribs 5 e the internal faces 7 ′ of the ribs 5, is generally planar. In other types of dies 30 or other subsets of machines for forming or assembling sachets, the ribs 5 make it possible to precisely wedge the profiles 2, in said dies 30, between guide elements 31 , blades or rollers (Figure 5). For this, the width of the base 3 between the bases of the internal faces 7 ′ of the ribs 5 is approximately complementary to the width of the guide elements 31.

Claims

Revendications claims
1. Sachet en matière plastique muni d'un dispositif de fermeture (1) séparable et refermable, constitué de, deux profilés (2), chaque profilé (2) étant constitué d'une embase (3) pou rvue, sur u ne face, d'un élément de fermeture (4), apte à coopérer avec celui de l'autre profilé (2) et, sur la face opposée, d'au moins une nervure de fixation (5) de l'embase (3) sur u ne paroi de sachet (10), par fusion et écrasement de la nervure de fixation (5) sur ladite paroi (10), caractérisé en ce que la nervure de fixation (5) a une section transverse dont la largeur croît de l'extrémité libre vers l'embase (3).1. Plastic bag provided with a separable and reclosable closure device (1), consisting of two profiles (2), each profile (2) consisting of a base (3) for viewing on one side , a closing element (4), able to cooperate with that of the other profile (2) and, on the opposite face, of at least one fixing rib (5) of the base (3) on u bag wall (10), by melting and crushing the fixing rib (5) on said wall (10), characterized in that the fixing rib (5) has a cross section whose width increases by free end towards the base (3).
2. Sachet selon la revendication 1 caractérisé en ce que la nervure de fixation (5) a une section transverse globalement triangulaire.2. Bag according to claim 1 characterized in that the fixing rib (5) has a generally triangular cross section.
3. Sachet selon la revendication 1 ou 2 caractérisé en ce que le triangle défini par la section transversale de la nervure de fixation (5) est isocèle, et dont aucun des deux côtés de même longueur ne coïncide avec l'embase (3).3. Bag according to claim 1 or 2 characterized in that the triangle defined by the cross section of the fixing rib (5) is isosceles, and in which neither of the two sides of the same length coincides with the base (3).
4. Sachet selon la revendication 1 caractérisé en ce que le triangle défini par la section transversale de la nervure de fixation (5) est équilatéral.4. Bag according to claim 1 characterized in that the triangle defined by the cross section of the fixing rib (5) is equilateral.
5. Sachet selon l'une des revendications précédentes caractérisé en ce que chaque profilé comporte deux nervures (5), chacune située à proximité d'un bord longitudinal (8) de l'embase (3) et sur la face de l'embase (3) opposée à celle portant l'élément de fermeture (4). 5. Bag according to one of the preceding claims, characterized in that each section has two ribs (5), each located near a longitudinal edge (8) of the base (3) and on the face of the base. (3) opposite to that carrying the closure element (4).
6. Sachet selon l'une quelconque des revendications 1 à 4 caractérisé en ce que chaque profilé comporte quatre nervures de fixation (5), situées sur la face de l'embase (3) opposée à celle portant l'élément de fermeture (4) et dont deux sont chacune située à proximité d'un bord longitudinal (8) de l'embase (3), et sur la face de l'embase (3) opposée à celle portant l'élément de fermeture (4). 6. Bag according to any one of claims 1 to 4 characterized in that each profile has four fixing ribs (5), located on the face of the base (3) opposite to that carrying the closure element (4 ) and two of which are each located near a longitudinal edge (8) of the base (3), and on the face of the base (3) opposite to that carrying the closure element (4).
7. Sachet selon l'une quelconque des précédentes revendications caractérisé en ce que chaque nervure de fixation (5) est teintée dans la masse.7. Bag according to any one of the preceding claims, characterized in that each fixing rib (5) is tinted in the mass.
8. Sachet selon l'une quelconque des revendications précédentes caractérisé en ce que les nervures (5) sont teintées d'une manière différente de part et d'autre des éléments de fermeture (4).8. Bag according to any one of the preceding claims, characterized in that the ribs (5) are tinted differently on either side of the closure elements (4).
9. Sachet selon l'une quelconque des revendications précédentes caractérisé en ce que les nervures (5) présentent une géométrie et une position sur l'embase (3) qui permettent à l'ensemble des deux profilés (2) du dispositif de fermeture (1) de se déformer, afin d'avoir u n encombrement réduit pour faciliter l'introduction et lé passage desdits profilés (2) dans des filières (20) d'extrudeuses.9. Bag according to any one of the preceding claims, characterized in that the ribs (5) have a geometry and a position on the base (3) which allow the assembly of the two profiles (2) of the closure device ( 1) to deform, in order to have a reduced bulk to facilitate the introduction and the passage of said sections (2) in extruder dies (20).
10. Sachet selon l'une quelconque des revendications précédentes caractérisé en ce que la somme des largeurs des faces externes (7) des nervures (5) est approximativement inférieure ou égale à l'épaisseur de l'ensemble des deux profilés (2) au droit des éléments de fermeture (4) lorsque lesdits éléments (4) sont imbriqués l'un dans l'autre.10. Bag according to any one of the preceding claims, characterized in that the sum of the widths of the external faces (7) of the ribs (5) is approximately less than or equal to the thickness of the assembly of the two profiles (2) at right of the closing elements (4) when said elements (4) are nested one inside the other.
11. Sachet selon l'une quelconque des revendications précédentes caractérisé en ce que les nervures (5) permettent de caler les profilés entre des éléments de guidage (31).11. Bag according to any one of the preceding claims, characterized in that the ribs (5) make it possible to wedge the profiles between guide elements (31).
12. Dispositif de fermeture (1) pour la réalisation d'un sachet selon l'une quelconque des revendications précédentes, constitué de, deux profilés (2), chaque profilé (2) étant constitué d'une embase (3) pourvue, sur une face, d'un élément de fermeture (4), apte à coopérer avec celui de l'autre profilé (2) et, sur la face opposée, d'au moins une nervure de fixation (5) de l'embase (3) sur u ne paroi de sachet (10), par fusion et écrasement de la nervure de fixation (5) sur ladite paroi (10), caractérisé en ce que la nervure de fixation (5) a une section transverse dont la largeur croît de l'extrémité libre vers l'embase (3). 12. Closure device (1) for producing a bag according to any one of the preceding claims, consisting of, two sections (2), each section (2) consisting of a base (3) provided on one face, of a closure element (4), capable of cooperating with that of the other profile (2) and, on the opposite face, of at least one fixing rib (5) of the base (3 ) on a bag wall (10), by melting and crushing the fixing rib (5) on said wall (10), characterized in that the fixing rib (5) has a cross section whose width increases by the free end towards the base (3).
13. Dispositif de fermeture (1) selon la revendication 12 caractérisé en ce que la nervure de fixation (5) a une section transverse globalement triangulaire.13. Closure device (1) according to claim 12 characterized in that the fixing rib (5) has a generally triangular cross section.
14. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 ou 13 caractérisé en ce que chaque profilé comporte deux nervures (5), chacune située à proximité d'un bord longitudinal (8) de l'embase (3) et sur la face de l'embase (3) opposée à celle portant l'élément de fermeture (4).14. Closure device (1) according to any one of claims 12 or 13 characterized in that each profile has two ribs (5), each located near a longitudinal edge (8) of the base (3) and on the face of the base (3) opposite to that carrying the closure element (4).
15. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 à 14 caractérisé en ce que chaque nervure de fixation15. Closure device (1) according to any one of claims 12 to 14 characterized in that each fixing rib
(5) est teintée dans la masse.(5) is tinted in the mass.
16. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 à 15 caractérisé en ce que les nervures (5) sont teintées d'une manière différente de part et d'autre des éléments de fermeture (4). 16. Closure device (1) according to any one of claims 12 to 15 characterized in that the ribs (5) are tinted in a different manner on either side of the closure elements (4).
17. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 à 16 caractérisé en ce que les nervures (5) présentent une géométrie et une position sur l'embase (3) qui permettent à l'ensemble des deux profilés (2) du dispositif de fermeture (1) de se déformer afin d'avoir un encombrement réduit pour faciliter l'introduction et le passage desdits profilés (2) dans les filières (20) d'extrudeuses.17. Closure device (1) according to any one of claims 12 to 16 characterized in that the ribs (5) have a geometry and a position on the base (3) which allow the assembly of the two profiles ( 2) of the closure device (1) to deform in order to have a reduced bulk to facilitate the introduction and the passage of said profiles (2) in the extruder dies (20).
18. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 à 17 caractérisé en ce que la somme des largeurs des faces externes (7) des nervures (5) est approximativement inférieure ou égale à l'épaisseur de l'ensemble des deux profilés (2) au droit des éléments de fermeture (4) lorsque lesdits éléments (4) sont imbriqués l'un dans l'autre.18. Closure device (1) according to any one of claims 12 to 17 characterized in that the sum of the widths of the external faces (7) of the ribs (5) is approximately less than or equal to the thickness of the assembly of the two profiles (2) in line with the closing elements (4) when said elements (4) are nested one inside the other.
19. Dispositif de fermeture (1) selon l'une quelconque des revendications 12 à 18 caractérisé en ce que les nervures (5) permettent de caler les profilés (2) entre des éléments de guidage {3 )- 19. Closure device (1) according to any one of claims 12 to 18 characterized in that the ribs (5) make it possible to wedge the profiles (2) between guide elements {3) -
PCT/FR1998/001248 1997-06-17 1998-06-15 Bag comprising a closing device with matching sections and closing device therefor WO1998057863A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NZ334178A NZ334178A (en) 1997-06-17 1998-06-15 Plastics bag with interlocking closure strips having bag wall fixing ribs which taper towards their free end
CA002263371A CA2263371A1 (en) 1997-06-17 1998-06-15 Bag comprising a closing device with matching sections and closing device therefor
AT98932203T ATE248756T1 (en) 1997-06-17 1998-06-15 BAG WITH COMPLEMENTARY PROFILE LOCKING STRIPS AND SUCH A LOCKING DEVICE
DE69817748T DE69817748T2 (en) 1997-06-17 1998-06-15 BAG WITH COMPLEMENTARY PROFILE SEALING STRIPS AND SUCH A SEALING DEVICE
EP98932203A EP0925229B1 (en) 1997-06-17 1998-06-15 Bag comprising a closing device with matching sections and closing device therefor
AU82187/98A AU728260B2 (en) 1997-06-17 1998-06-15 A bag including a closure device made of complementary strips and a closure device therefor
BR9806226A BR9806226A (en) 1997-06-17 1998-06-15 Plastic bag and closing device.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/07490 1997-06-17
FR9707490A FR2764582B1 (en) 1997-06-17 1997-06-17 POUCH COMPRISING A CLOSURE DEVICE FORMED BY ADDITIONAL PROFILES AND CLOSURE DEVICE THEREFOR

Publications (1)

Publication Number Publication Date
WO1998057863A1 true WO1998057863A1 (en) 1998-12-23

Family

ID=9508061

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1998/001248 WO1998057863A1 (en) 1997-06-17 1998-06-15 Bag comprising a closing device with matching sections and closing device therefor

Country Status (9)

Country Link
EP (1) EP0925229B1 (en)
AT (1) ATE248756T1 (en)
AU (1) AU728260B2 (en)
BR (1) BR9806226A (en)
CA (1) CA2263371A1 (en)
DE (1) DE69817748T2 (en)
FR (1) FR2764582B1 (en)
NZ (1) NZ334178A (en)
WO (1) WO1998057863A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6438926B1 (en) 1997-11-07 2002-08-27 Pliant Corporation Method and apparatus for placing a product in a flexible recloseable container
US6499272B2 (en) 1997-11-07 2002-12-31 Huntsman Kcl Corporation Method for placing a product in a flexible recloseable container
US6925688B1 (en) * 2000-06-06 2005-08-09 The Glad Products Company Closure device
US7163133B2 (en) 2004-03-05 2007-01-16 S.C. Johnson Home Storage, Inc. Apparatus for and method of moving a slider along mating zipper elements
US7244222B2 (en) 2004-03-05 2007-07-17 S.C. Johnson Home Storage, Inc. Apparatus for and method of positioning a slider on mating zipper elements
US7611284B2 (en) 2004-04-26 2009-11-03 The Glad Products Company Closure device
US10472857B2 (en) 2014-03-26 2019-11-12 Gatekeeper Innovation, Inc. Locking cap with push button reset
US10717571B1 (en) 2018-03-06 2020-07-21 Gatekeeper Innovation, Inc. Clam shell cover cap and method of use
US11273963B2 (en) 2009-09-03 2022-03-15 Gatekeeper Innovation, Inc. Lockable cap for medical prescription bottle
US11279535B1 (en) 2018-03-06 2022-03-22 Gatekeeper Innovation, Inc. Clam shell cover cap and method of use

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Publication number Priority date Publication date Assignee Title
FR2613326A1 (en) * 1987-04-03 1988-10-07 Flexico France Sarl Separable closing strip; method and device for fixing it to a substrate
US5628566A (en) * 1996-01-29 1997-05-13 Reynolds Consumer Products, Inc. Profile sealing flange

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2613326A1 (en) * 1987-04-03 1988-10-07 Flexico France Sarl Separable closing strip; method and device for fixing it to a substrate
US5628566A (en) * 1996-01-29 1997-05-13 Reynolds Consumer Products, Inc. Profile sealing flange

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6438926B1 (en) 1997-11-07 2002-08-27 Pliant Corporation Method and apparatus for placing a product in a flexible recloseable container
US6499272B2 (en) 1997-11-07 2002-12-31 Huntsman Kcl Corporation Method for placing a product in a flexible recloseable container
US6925779B2 (en) 1997-11-07 2005-08-09 Illinois Tool Works Inc. Method and apparatus for placing a product in a flexible recloseable container
US6925688B1 (en) * 2000-06-06 2005-08-09 The Glad Products Company Closure device
US7163133B2 (en) 2004-03-05 2007-01-16 S.C. Johnson Home Storage, Inc. Apparatus for and method of moving a slider along mating zipper elements
US7244222B2 (en) 2004-03-05 2007-07-17 S.C. Johnson Home Storage, Inc. Apparatus for and method of positioning a slider on mating zipper elements
US7611284B2 (en) 2004-04-26 2009-11-03 The Glad Products Company Closure device
US11273963B2 (en) 2009-09-03 2022-03-15 Gatekeeper Innovation, Inc. Lockable cap for medical prescription bottle
US10472857B2 (en) 2014-03-26 2019-11-12 Gatekeeper Innovation, Inc. Locking cap with push button reset
US11008777B2 (en) 2014-03-26 2021-05-18 Gatekeeper Innovation, Inc. Locking cap with push button reset
US10717571B1 (en) 2018-03-06 2020-07-21 Gatekeeper Innovation, Inc. Clam shell cover cap and method of use
US11267625B2 (en) 2018-03-06 2022-03-08 Gatekeeper Innovation, Inc. Clam shell cover cap and method of use
US11279535B1 (en) 2018-03-06 2022-03-22 Gatekeeper Innovation, Inc. Clam shell cover cap and method of use
US11845597B2 (en) 2018-03-06 2023-12-19 Rxguardian Inc. Clam shell cover cap and method of use
US11845596B2 (en) 2018-03-06 2023-12-19 Rxguardian Inc. Clam shell cover cap and method of use

Also Published As

Publication number Publication date
AU728260B2 (en) 2001-01-04
FR2764582B1 (en) 1999-09-03
ATE248756T1 (en) 2003-09-15
AU8218798A (en) 1999-01-04
EP0925229A1 (en) 1999-06-30
NZ334178A (en) 2000-09-29
DE69817748T2 (en) 2004-07-29
BR9806226A (en) 2000-03-21
FR2764582A1 (en) 1998-12-18
DE69817748D1 (en) 2003-10-09
EP0925229B1 (en) 2003-09-03
CA2263371A1 (en) 1998-12-23

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