EP0906866A1 - Method and machine for the automatic manufacture of bags, as well as the bags thus obtained - Google Patents

Method and machine for the automatic manufacture of bags, as well as the bags thus obtained Download PDF

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Publication number
EP0906866A1
EP0906866A1 EP98402426A EP98402426A EP0906866A1 EP 0906866 A1 EP0906866 A1 EP 0906866A1 EP 98402426 A EP98402426 A EP 98402426A EP 98402426 A EP98402426 A EP 98402426A EP 0906866 A1 EP0906866 A1 EP 0906866A1
Authority
EP
European Patent Office
Prior art keywords
film
closure means
web
closure
welded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98402426A
Other languages
German (de)
French (fr)
Inventor
Henri Georges Bois
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.)
Flexico France SARL
Original Assignee
Flexico France SARL
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 SARL filed Critical Flexico France SARL
Publication of EP0906866A1 publication Critical patent/EP0906866A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8133—Applying the closure elements in the cross direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916—Pliable container
    • Y10S493/927—Reclosable

Definitions

  • the present invention relates to the field of manufacturing automatic bags or sachets comprising closing profiles complementary adapted to allow openings and closings successive, at the user's discretion.
  • the present invention now aims to provide new ways of making such sachets or bags comprising complementary closure profiles.
  • the present invention also relates to a machine for implementation of this process, as well as sachets and products intermediates obtained by this process.
  • the forming neck 20 receives the film F at the input state in the planar state (and provided closure means 100 as will be explained later). He gives at the output, the film F shaped into a tube.
  • the expression "tube” or “tubular” should not be considered as limiting to a tubular section of revolution. It also includes especially any polygonal tubular section.
  • the filling chute 30 opens into the forming neck 20 and in the tube formed by the film F at the outlet from this forming neck 20.
  • the longitudinal welding means 40 are adapted to close the tube thus formed by joining the two longitudinal edges of the film F
  • the transverse welding means 50 are preferably adapted to sequentially generate a first transverse weld 52 before a product is introduced into the tube through the chute filling 30, then a second transverse weld 54 when the product has been introduced into the tube, to close a bag around the latter.
  • these two welds 52 and 54 can be generated simultaneously, by both and other cutting means 56 ensuring the separation of the bags, thanks to 50 double welding jaws.
  • the welding means 40 and 50 are preferably formed of heated jaws moving cyclically in approximation and separation of the film in a direction orthogonal to the axis of movement thereof.
  • the aforementioned welding means adapted to ensure welding of the second web 124 can be integrated into the welding means 50 transverse.
  • weld lines of the first web 114 on film F are referenced 115, while the weld line of the second veil 124 on film F is referenced 125.
  • sections T of closure means 100 are sectioned using a cutting tool 80 from a coil reserve 82 as shown schematically in Figure 1 attached.
  • the means 60 adapted to convey sections of means of closure 100 transversely on the film F and weld said means of closure 100 on it, can be the subject of many variants of production. They can generally be in accordance with the means described in documents US-A-4,909,017, US-A-4,617,683, US-A-4,665,862, US-A-4,666,536, US-A-4,878,987 and US-A-4,844,759.
  • these means are essentially in accordance with the provisions described in patent application FR 96 02390 filed on February 27 1996 in the name of the Applicant, according to which the means routing 60 include a straight guide 62, for the means of closure 100, superimposed on film F, transverse thereto, designed to precisely position the closure means 100 on the film F and means 64 for gripping or gripping (pliers, needle or suction head) which proceed by traction on the front end of the closure means 100 and not by pushing on the rear end thereof, to convey the means closure 100 in the above-mentioned rectilinear guide 62.
  • gripping or gripping pliers, needle or suction head
  • sections T of closure means 100 routed and welded to film F preferably have a length equal to maximum at half the width of the film F.
  • sections T of closure means 100 are of preferably deposited and welded on the film F in a centered position according to the width of it.
  • the closure means 100 may include two complementary profiles 112, 122 arranged on respective separate webs 114, 124, as seen in Figures 2 and 4 to 6.
  • the sails 114, 124 carrying the profiles complementary 112, 122 can be connected in the form of a canvas common 130 of U-shaped geometry as seen in Figure 3.
  • the U-shaped fabric 130 may have its convexity directed towards the front or towards the rear in the direction of movement L of the film F.
  • this convexity is preferably turned towards the back.
  • the first web 114 of the closure means is welded on film F at its two longitudinal edges, at 115.
  • the first veil 114 of the closure means 100 may only be welded to the film F on one only from its longitudinal edges. In this case it is preferably from the longitudinal edge of the web 114, located in front with reference to the direction of displacement L of the film F, as illustrated in FIG. 4.
  • the weld 115 formed between the web 114 and the film F prevents detachment of the means of closure 100 when moving the film F.
  • the weld 125 produced on only one longitudinal edge of the second sail 124 is operated on the rear longitudinal edge in reference to the direction of movement L of the film F, as seen on the Figure 5.
  • This weld 125 is thus placed on the mouth of the bag and not on the internal volume side of it. Therefore internal pressure of the bag requests closing profiles 112, 122 in approach and not away.
  • the webs 114 and 124 of the closure means 100 may be provided with longitudinal beads 116, 126 at the level of the edges of the webs 114, 124 to be welded to the film F (these are preferably beads 116, 126 tapered away from the web 114, 124, for example beads of generally triangular cross section such that defined in the French patent application filed in the name of Applicant on June 17, 1997 under N ° 97 07490 and as shown schematically in Figure 6), or even localized layers of material facilitating the welding of the sails 114, 124 at this level.
  • the present invention is particularly applicable to the production of bags based on plastic film F.
  • the present invention can apply to the production of bags based on film F formed from any material equivalent, in particular based on complex film comprising a sheet of paper or metal coated with a layer of plastic material.
  • the support sails 114, 124 profiles 112, 122 of the closure means 100 may have come from molding with their respective profile 112, 122 or be attached to it.
  • the geometry of the complementary sections 112, 122 can be the subject of numerous variant embodiments.
  • the sections 112 and 122 are respectively formed of an element single female and a single male element adapted to enter said female element.
  • a means of closure 100 in which the sections 112 and 122 each comprise several male and female elements respectively juxtaposed such as described for example in document FR-A-2 613 326.
  • profiles 112 and 122 can also include, in a manner known per se, support ribs or buttresses, preferably arranged laterally on the outside of the male elements and female, to guarantee a reliable engagement of these.
  • closure means 100 comprising two support sails 114, 124 of width substantially identical.
  • sails supports 114, 124 of markedly different width.
  • present invention is not limited to the modes of particular achievements which have just been described, but extends to all variants according to his spirit.
  • the step of welding the first web 114 of the means of closure 100, on film F can be operated on the forming machine, filling and closing of bags, immediately upstream of the means 20, during a continuous process, or on the contrary, the first web 114 of the closure means 100 can be welded to the film F during a stage prior to the implementation on the machine of formation, filling and automatic closing illustrated in figure 1, the film F thus equipped with the closure means 100 being conditioned before to be routed to the forming means 20 of said machine for the implementation of the above method.
  • the sachets obtained can have many characteristics complementary to those previously described, such as lines of precut, opening or decoration borders etc ...

Abstract

A closure (100) comprises complementary engaging sections. Each section is located on a support strip. The film (F) supplied, will form the sachet wall. A strip of the closure is welded transversely across the film which is then shaped into a tube. Finally, the second strip is welded to the opposite face of the film. Independent claims are included for a machine carrying out the process which has a closure feeder (60) supplying transversely towards film off the roll (10). Closure welding equipment (70) attaches the closure strips to the film. A shaping section (20) forms the film onto the filling tube. A further welder (50) completes attachment of the second closure strip to the opposite face of the film. The film equipped with closure is also claimed, as is the sachet made as described. Preferred features: The complementary profiles are inter-engaged during welding of the first strip. The closure comprises two complementary profiles, located one on each separate strip. The profiles may be attached to a single U-shaped strip of material, its convex section facing the rear, in the direction of motion (L) of the film. The welding method and machine are further detailed.

Description

La présente invention concerne le domaine de la fabrication automatique de sacs ou sachets comprenant des profilés de fermeture complémentaires adaptés pour permettre des ouvertures et fermetures successives, à volonté de l'utilisateur.The present invention relates to the field of manufacturing automatic bags or sachets comprising closing profiles complementary adapted to allow openings and closings successive, at the user's discretion.

De nombreux moyens ont déjà été proposés à cet effet, tant au niveau des profilés, que des machines et des procédés pour la fabrication de tels sacs ou sachets.Many means have already been proposed for this purpose, both in level of profiles, only machines and processes for manufacturing such bags or sachets.

Des exemples de tels moyens pourront être trouvés dans les documents US-A-5 242 516, US-A-5 216 787, FR-A-2 613 326, US-A-4 909 017, US-A-4 617 683, US-A-4 709 533, EP-A-0 398 732, EP-A-0 635 433, US-A-4 817 188 et US-A-5 412 924.Examples of such means can be found in the documents US-A-5 242 516, US-A-5 216 787, FR-A-2 613 326, US-A-4 909 017, US-A-4 617 683, US-A-4 709 533, EP-A-0 398 732, EP-A-0 635 433, US-A-4,817,188 and US-A-5,412,924.

La présente invention a maintenant pour but de proposer de nouveaux moyens permettant de réaliser de tels sachets ou sacs comprenant des profilés de fermeture complémentaires.The present invention now aims to provide new ways of making such sachets or bags comprising complementary closure profiles.

Ce but est atteint dans le cadre de la présente invention grâce à un procédé de formation et fermeture de sachets, comprenant les étapes consistant à :

  • fournir un moyen de fermeture comprenant au moins deux profilés complémentaires disposés sur deux voiles supports respectifs,
  • fournir un film support destiné à composer les parois du sachet,
  • souder un voile du moyen de fermeture sur le film au niveau de l'un au moins des bords longitudinaux dudit voile, le moyen de fermeture étant orienté transversalement à la direction longitudinale du film,
  • conformer le film ainsi muni du moyen de fermeture, sous forme d'un tube, puis
  • souder le second voile du moyen de fermeture sur une face opposée du film, au niveau d'un bord seulement dudit second voile.
This object is achieved in the context of the present invention by a process for forming and closing sachets, comprising the steps consisting in:
  • providing a closure means comprising at least two complementary profiles arranged on two respective support webs,
  • provide a support film intended to compose the walls of the sachet,
  • welding a veil of the closure means to the film at at least one of the longitudinal edges of said veil, the closure means being oriented transversely to the longitudinal direction of the film,
  • conform the film thus provided with the closure means, in the form of a tube, then
  • welding the second web of the closure means on an opposite face of the film, at one edge only of said second web.

La présente invention concerne également une machine pour la mise en oeuvre de ce procédé, ainsi que les sachets et produits intermédiaires obtenus grâce à ce procédé.The present invention also relates to a machine for implementation of this process, as well as sachets and products intermediates obtained by this process.

D'autres caractéristiques, buts et avantages de la présente invention apparaitront à la lecture de la description détaillée qui va suivre et en regard des dessins annexés, donnés à titre d'exemples non limitatifs et sur lesquels :

  • la figure 1 représente une vue schématique en perspective d'une machine de formation, remplissage et fermeture automatique de sacs, conforme à la présente invention,
  • les figures 2 à 4 représentent des vues latérales du film équipé du moyen de fermeture, en amont d'un col de formage, selon trois variantes de réalisation conformes à la présente invention,
  • la figure 5 représente une vue en coupe transversale du sommet d'un sac obtenu à l'aide d'une telle machine, et
  • la figure 6 représente une variante de réalisation d'un moyen de fermeture susceptible d'être mis en oeuvre dans le cadre de la présente invention.
Other characteristics, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings, given by way of nonlimiting examples and in which:
  • FIG. 1 represents a schematic perspective view of a machine for forming, filling and automatically closing bags, in accordance with the present invention,
  • FIGS. 2 to 4 show side views of the film fitted with the closure means, upstream of a forming neck, according to three alternative embodiments in accordance with the present invention,
  • FIG. 5 represents a cross-sectional view of the top of a bag obtained using such a machine, and
  • FIG. 6 represents an alternative embodiment of a closure means capable of being implemented in the context of the present invention.

On aperçoit sur la figure 1 annexée une machine de formation, remplissage et fermeture automatique de sacs comportant des profilés de fermeture complémentaires 100, laquelle machine comprend :

  • des moyens 10 d'acheminement d'un film F dans une direction longitudinale L
  • un col de formage 20,
  • une goulotte de remplissage 30,
  • des moyens 40 de soudure longitudinale et
  • des moyens 50 de soudure transversale et de séparation de sacs.
We can see in FIG. 1 attached a machine for automatically forming, filling and closing bags comprising complementary closure profiles 100, which machine comprises:
  • means 10 for conveying a film F in a longitudinal direction L
  • a forming neck 20,
  • a filling chute 30,
  • means 40 for longitudinal welding and
  • means 50 for transverse welding and separation of bags.

Le col de formage 20 reçoit en entrée le film F à l'état plan (et muni du moyen de fermeture 100 comme cela sera précisé par la suite). Il fournit en sortie le film F conformé en tube. Dans le cadre de la présente invention l'expression "tube" ou "tubulaire" ne doit pas être considérée comme limitative à une section tubulaire de révolution. Elle englobe également notamment toute section tubulaire polygonale.The forming neck 20 receives the film F at the input state in the planar state (and provided closure means 100 as will be explained later). He gives at the output, the film F shaped into a tube. In the context of the present invention the expression "tube" or "tubular" should not be considered as limiting to a tubular section of revolution. It also includes especially any polygonal tubular section.

La goulotte de remplissage 30 débouche dans le col de formage 20 et dans le tube formé par le film F en sortie de ce col de formage 20.The filling chute 30 opens into the forming neck 20 and in the tube formed by the film F at the outlet from this forming neck 20.

Les moyens 40 de soudure longitudinale sont adaptés pour fermer le tube ainsi formé en réunissant les deux bords longitudinaux du film FThe longitudinal welding means 40 are adapted to close the tube thus formed by joining the two longitudinal edges of the film F

Les moyens 50 de soudure transversale sont de préférence adaptés pour générer séquentiellement une première soudure transversale 52 avant qu'un produit ne soit introduit dans le tube par la goulotte de remplissage 30, puis une seconde soudure transversale 54 quand le produit a été introduit dans le tube, pour fermer un sachet autour de ce dernier. En pratique, comme on le devine à l'examen de la figure 1, ces deux soudures transversales 52 et 54 peuvent être générées simultanément, de part et d'autre de moyens de coupe 56 assurant la séparation des sachets, grâce à des mâchoires de soudure 50 doubles.The transverse welding means 50 are preferably adapted to sequentially generate a first transverse weld 52 before a product is introduced into the tube through the chute filling 30, then a second transverse weld 54 when the product has been introduced into the tube, to close a bag around the latter. In practical, as we guess on examining Figure 1, these two welds 52 and 54 can be generated simultaneously, by both and other cutting means 56 ensuring the separation of the bags, thanks to 50 double welding jaws.

Les moyens de soudure 40 et 50 sont de préférence formés de mâchoires chauffantes animées d'un déplacement cyclique en rapprochement et en éloignement du film selon une direction orthogonale à l'axe de déplacement de celui-ci.The welding means 40 and 50 are preferably formed of heated jaws moving cyclically in approximation and separation of the film in a direction orthogonal to the axis of movement thereof.

Cette structure générale de machine étant connue, elle ne sera pas décrite plus en détail par la suite.This general machine structure being known, it will not be described in more detail later.

Dans le cadre de la présente invention, la machine comporte en outre

  • des moyens 60 adaptés pour fournir des tronçons T d'un moyen de fermeture 100 comprenant deux éléments 110, 120 constituant deux profilés complémentaires 112, 122 disposés sur deux voiles supports respectifs 114, 124,
  • des moyens 70 adaptés pour souder un voile 114 du moyen de fermeture 100 sur le film F au niveau de l'un au moins des bords longitudinaux dudit voile 114, en amont du col de formage 20, le moyen de fermeture F étant orienté transversalement à la direction longitudinale L du film F (au cours de cette étape, de préférence les deux profilés complémentaires 112, 122 sont en prise), et
  • des moyens adaptés pour souder le second voile 124 du moyen de fermeture 100 sur une face opposée du film F, au niveau d'un bord seulement dudit second voile 124, en aval du col de formage 20.
In the context of the present invention, the machine further comprises
  • means 60 adapted to supply sections T of a closure means 100 comprising two elements 110, 120 constituting two complementary sections 112, 122 arranged on two respective support webs 114, 124,
  • means 70 adapted to weld a web 114 of the closure means 100 on the film F at at least one of the longitudinal edges of said web 114, upstream of the forming neck 20, the closure means F being oriented transversely to the longitudinal direction L of the film F (during this step, preferably the two complementary sections 112, 122 are engaged), and
  • means adapted to weld the second web 124 of the closure means 100 on an opposite face of the film F, at only one edge of said second web 124, downstream of the forming neck 20.

Les moyens de soudure précités adaptés pour assurer la soudure du second voile 124 peuvent être intégrés aux moyens 50 de soudure transversale. The aforementioned welding means adapted to ensure welding of the second web 124 can be integrated into the welding means 50 transverse.

Sur les figures annexées les lignes de soudure du premier voile 114 sur le film F sont référencées 115, tandis que la ligne de soudure du second voile 124 sur le film F est référencée 125.In the appended figures the weld lines of the first web 114 on film F are referenced 115, while the weld line of the second veil 124 on film F is referenced 125.

De préférence les tronçons T de moyen de fermeture 100 sont sectionnés à l'aide d'un outil de coupe 80 à partir d'une réserve en bobine 82 comme cela est schématisé sur la figure 1 annexée.Preferably the sections T of closure means 100 are sectioned using a cutting tool 80 from a coil reserve 82 as shown schematically in Figure 1 attached.

Les moyens 60 adaptés pour acheminer des tronçons de moyen de fermeture 100 transversalement sur le film F et souder ledit moyen de fermeture 100 sur celui-ci, peuvent faire l'objet de nombreuses variantes de réalisation. Ils peuvent être globalement conformes aux moyens décrits dans les documents US-A-4 909 017, US-A-4 617 683, US-A-4 665 862, US-A-4 666 536, US-A-4 878 987 et US-A-4 844 759. Cependant de préférence ces moyens sont essentiellement conformes aux dispositions décrites dans la demande de brevet FR 96 02390 déposée le 27 février 1996 au nom de la Demanderesse, selon lesquelles les moyens d'acheminement 60 comprennent un guide rectiligne 62, pour le moyen de fermeture 100, superposé au film F, transversalement à celui-ci, conçu pour positionner avec précision le moyen de fermeture 100 sur le film F et des moyens 64 de saisie ou de préhension (pince, aiguille ou tête aspirante) qui procèdent par traction sur l'extrémité avant du moyen de fermeture 100 et non par poussée sur l'extrémité arrière de celui-ci, pour acheminer le moyen de fermeture 100 dans le guide rectiligne précité 62. Ces dispositions permettent de garantir une dépose à l'état bien rectiligne du moyen de fermeture 100 sur le film F.The means 60 adapted to convey sections of means of closure 100 transversely on the film F and weld said means of closure 100 on it, can be the subject of many variants of production. They can generally be in accordance with the means described in documents US-A-4,909,017, US-A-4,617,683, US-A-4,665,862, US-A-4,666,536, US-A-4,878,987 and US-A-4,844,759. preferably these means are essentially in accordance with the provisions described in patent application FR 96 02390 filed on February 27 1996 in the name of the Applicant, according to which the means routing 60 include a straight guide 62, for the means of closure 100, superimposed on film F, transverse thereto, designed to precisely position the closure means 100 on the film F and means 64 for gripping or gripping (pliers, needle or suction head) which proceed by traction on the front end of the closure means 100 and not by pushing on the rear end thereof, to convey the means closure 100 in the above-mentioned rectilinear guide 62. These provisions make it possible to guarantee removal in a very rectilinear state of the means of closure 100 on film F.

Ainsi les tronçons T de moyen de fermeture 100 acheminés et soudés sur le film F possèdent de préférence une longueur égale au maximum à la moitié de la largeur du film F.Thus the sections T of closure means 100 routed and welded to film F preferably have a length equal to maximum at half the width of the film F.

Par ailleurs les tronçons T de moyen de fermeture 100 sont de préférence déposés et soudés sur le film F en position centrée selon la largeur de celui-ci.Furthermore, the sections T of closure means 100 are of preferably deposited and welded on the film F in a centered position according to the width of it.

Dans le cadre de la présente invention, le moyen de fermeture 100 peut comprendre deux profilés complémentaires 112, 122 disposés sur des voiles respectifs séparés 114, 124, comme on le voit sur les figures 2 et 4 à 6. Cependant en variante les voiles 114, 124 portant les profilés complémentaires 112, 122 peuvent être reliés sous forme d'une toile commune 130 de géométrie en U comme on le voit sur la figure 3. Dans ce cas, la toile en U 130 peut avoir sa convexité dirigée vers l'avant ou vers l'arrière dans le sens du déplacement L du film F. Cependant dans le cadre de la présente invention, cette convexité est de préférence tournée vers l'arrière.In the context of the present invention, the closure means 100 may include two complementary profiles 112, 122 arranged on respective separate webs 114, 124, as seen in Figures 2 and 4 to 6. However as a variant the sails 114, 124 carrying the profiles complementary 112, 122 can be connected in the form of a canvas common 130 of U-shaped geometry as seen in Figure 3. In this case, the U-shaped fabric 130 may have its convexity directed towards the front or towards the rear in the direction of movement L of the film F. However in the frame of the present invention, this convexity is preferably turned towards the back.

Selon le mode de réalisation schématisé sur la figure 2 et considéré comme préférentiel, le premier voile 114 du moyen de fermeture est soudé sur le film F au niveau de ses deux bords longitudinaux, en 115. On obtient ainsi une soudure dissymétrique du moyen de fermeture 100 sur le film F, comme illustré sur la figure 5, l'un des voiles 114 étant soudé par ses deux bords longitudinaux, tandis que le second voile 124 est soudé uniquement par un seul bord longitudinal. Cependant en variante, le premier voile 114 du moyen de fermeture 100 peut n'être soudé sur le film F que sur l'un seulement de ses bords longitudinaux. Dans ce cas il s'agit de préférence du bord longitudinal du voile 114, situé en avant en référence au sens de déplacement L du film F, comme illustré sur la figure 4. Ainsi la soudure 115 formée entre le voile 114 et le film F empêche un décolement du moyen de fermeture 100 lors du déplacement du film F.According to the embodiment shown diagrammatically in FIG. 2 and considered as a preference, the first web 114 of the closure means is welded on film F at its two longitudinal edges, at 115. We obtain thus an asymmetrical weld of the closure means 100 on the film F, as illustrated in FIG. 5, one of the sails 114 being welded by its two longitudinal edges, while the second web 124 is welded only by a single longitudinal edge. However as a variant, the first veil 114 of the closure means 100 may only be welded to the film F on one only from its longitudinal edges. In this case it is preferably from the longitudinal edge of the web 114, located in front with reference to the direction of displacement L of the film F, as illustrated in FIG. 4. Thus the weld 115 formed between the web 114 and the film F prevents detachment of the means of closure 100 when moving the film F.

La soudure 125 réalisée sur un bord longitudinal seulement du second voile 124 est quant à elle opérée sur le bord longitudinal arrière en référence au sens de déplacement L du film F, comme on le voit sur la figure 5. Cette soudure 125 est ainsi placée côté embouchure du sachet et non pas du côté du volume interne de celui-ci. De ce fait la pression interne du sachet sollicite les profilés de fermeture 112, 122 en rapprochement et non pas en éloignement.The weld 125 produced on only one longitudinal edge of the second sail 124 is operated on the rear longitudinal edge in reference to the direction of movement L of the film F, as seen on the Figure 5. This weld 125 is thus placed on the mouth of the bag and not on the internal volume side of it. Therefore internal pressure of the bag requests closing profiles 112, 122 in approach and not away.

Le cas échéant, les voiles 114 et 124 du moyen de fermeture 100 peuvent être pourvus de bourrelets longitudinaux 116, 126 au niveau des bords des voiles 114, 124 devant être soudés sur le film F (il s'agit de préférence de bourrelets 116, 126 effilés en éloignement du voile 114, 124, par exemple de bourrelets de section droite globalement triangulaire tel que défini dans la demande de brevet français déposée au nom de le Demanderesse le 17 Juin 1997 sous le N° 97 07490 et comme schématisé sur la figure 6), ou encore de couches localisées de matériau facilitant la soudure des voiles 114, 124 à ce niveau.Where appropriate, the webs 114 and 124 of the closure means 100 may be provided with longitudinal beads 116, 126 at the level of the edges of the webs 114, 124 to be welded to the film F (these are preferably beads 116, 126 tapered away from the web 114, 124, for example beads of generally triangular cross section such that defined in the French patent application filed in the name of Applicant on June 17, 1997 under N ° 97 07490 and as shown schematically in Figure 6), or even localized layers of material facilitating the welding of the sails 114, 124 at this level.

La présence de tels bourrelets 116, 126 permet notamment de garantir une bonne liaison entre les voiles 114, 124 et le film F, y compris en cas de défaut de parallélisme entre lesdits voiles 114, 124 et le film F.The presence of such beads 116, 126 makes it possible in particular to guarantee a good connection between the sails 114, 124 and the film F, including case of lack of parallelism between said webs 114, 124 and the film F.

La présente invention offre notamment les avantages suivants:

  • elle permet de bénéficier d'une certaine tolérance sur la position de la soudure 115, 125 entre les voiles 114, 124 du moyen de fermeture 100 et le film F, et
  • elle permet, grâce à la présence d'une seule soudure 125 localisée sur le second voile 124, de générer un effet de levier sur le moyen de fermeture 100 sous l'effet de la pression interne au sachet, ce qui permet d'améliorer la fermeture du sachet final, la pression interne du sachet sollicitant les deux profilés 112, 122 en engagement mutuel.
The present invention notably offers the following advantages:
  • it makes it possible to benefit from a certain tolerance on the position of the weld 115, 125 between the webs 114, 124 of the closure means 100 and the film F, and
  • it allows, thanks to the presence of a single weld 125 located on the second web 124, to generate a leverage on the closure means 100 under the effect of the pressure internal to the bag, which improves the closing of the final bag, the internal pressure of the bag biasing the two sections 112, 122 in mutual engagement.

La présente invention s'applique notamment à la réalisation de sacs à base de film F en matière plastique. Cependant la présente invention peut s'appliquer à la réalisation de sacs à base de film F formé de tout matériau équivalent, en particulier à base de film complexe comprenant une feuille de papier ou de métal revêtu d'une couche de matériau plastique.The present invention is particularly applicable to the production of bags based on plastic film F. However, the present invention can apply to the production of bags based on film F formed from any material equivalent, in particular based on complex film comprising a sheet of paper or metal coated with a layer of plastic material.

Dans le cadre de la présente invention, les voiles supports 114, 124 des profilés 112, 122 du moyen de fermeture 100 peuvent être venus de moulage avec leur profilé respectif 112, 122 ou être rapportés sur celui-ci.In the context of the present invention, the support sails 114, 124 profiles 112, 122 of the closure means 100 may have come from molding with their respective profile 112, 122 or be attached to it.

Par ailleurs la géométrie des profilés complémentaires 112, 122 peut faire l'objet de nombreuses variantes de réalisation.Furthermore, the geometry of the complementary sections 112, 122 can be the subject of numerous variant embodiments.

Ainsi selon le mode de réalisation représenté sur les figures annexées, les profilés 112 et 122 sont formés respectivement d'un élément femelle unique et d'un élément mâle unique adapté pour pénétrer dans ledit élément femelle. Cependant en variante on peut utiliser un moyen de fermeture 100 dans lequel les profilés 112 et 122 comprennent chacun plusieurs éléments respectivement mâle et femelle juxtaposés, tel que décrit par exemple dans le document FR-A-2 613 326. Thus according to the embodiment shown in the figures attached, the sections 112 and 122 are respectively formed of an element single female and a single male element adapted to enter said female element. However, as a variant, a means of closure 100 in which the sections 112 and 122 each comprise several male and female elements respectively juxtaposed, such as described for example in document FR-A-2 613 326.

Le cas échéant les profilés 112 et 122 peuvent également comprendre, de façon connue en soi, des nervures d'appui ou contreforts, disposés de préférence latéralement sur l'extérieur des éléments mâle et femelle, pour garantir un engagement fiable de ceux-ci.If necessary, profiles 112 and 122 can also include, in a manner known per se, support ribs or buttresses, preferably arranged laterally on the outside of the male elements and female, to guarantee a reliable engagement of these.

Sur les figures annexées on a représenté un moyen de fermeture 100 comprenant deux voiles supports 114, 124 de largeur sensiblement identique. En variante cependant on peut prévoir d'utiliser des voiles supports 114, 124 de largeur notablement différente. Bien entendu la présente invention n'est pas limitée aux modes de réalisation particuliers qui viennent d'être décrits, mais s'étend à toutes variantes conformes à son esprit.In the appended figures there is shown a closure means 100 comprising two support sails 114, 124 of width substantially identical. Alternatively, however, provision may be made to use sails supports 114, 124 of markedly different width. Of course, the present invention is not limited to the modes of particular achievements which have just been described, but extends to all variants according to his spirit.

En particulier, bien que l'on ait illustré sur les figures annexées une machine de formation, remplissage et fermeture de type vertical, c'est à dire une machine dans laquelle le col de formage 20 est disposé verticalement, la présente invention s'applique également à une machine de type horizontal, ou encore inclinée sur la verticale et l'horizontale.In particular, although one has illustrated in the appended figures a vertical type forming, filling and closing machine, i.e. a machine in which the forming neck 20 is arranged vertically, the present invention also applies to a machine of the type horizontal, or tilted vertically and horizontally.

Une telle machine de type horizontal comprend essentiellement :

  • des moyens d'acheminement d'un film F dans une direction longitudinale,
  • des moyens de dépôt du produit à conditionner, sur le film F,
  • des moyens de formage du film F autour du produit,
  • des moyens 40 de soudure longitudinale et
  • des moyens 50 de soudure transversale et de séparation de sacs.
Such a horizontal type machine essentially comprises:
  • means for conveying a film F in a longitudinal direction,
  • means for depositing the product to be packaged on film F,
  • means for forming the film F around the product,
  • means 40 for longitudinal welding and
  • means 50 for transverse welding and separation of bags.

Par ailleurs l'étape de soudure du premier voile 114 du moyen de fermeture 100, sur le film F, peut être opérée sur la machine de formation, remplissage et fermeture de sacs, immédiatement en amont des moyens de formage 20, au cours d'un procédé en continu, ou au contraire, le premier voile 114 du moyen de fermeture 100 peut être soudé sur le film F au cours d'une étape antérieure à la mise en oeuvre sur la machine de formation, remplissage et fermeture automatique illustrée sur la figure 1, le film F ainsi équipé du moyen de fermeture 100 étant conditionné avant d'être acheminé vers les moyens de formage 20 de la dite machine pour la mise en oeuvre du procédé précité. Furthermore, the step of welding the first web 114 of the means of closure 100, on film F, can be operated on the forming machine, filling and closing of bags, immediately upstream of the means 20, during a continuous process, or on the contrary, the first web 114 of the closure means 100 can be welded to the film F during a stage prior to the implementation on the machine of formation, filling and automatic closing illustrated in figure 1, the film F thus equipped with the closure means 100 being conditioned before to be routed to the forming means 20 of said machine for the implementation of the above method.

En outre, dans le cadre de la présente invention les sachets obtenus peuvent présenter de nombreuses caractéristiques complémentaires de celles précédemment décrites, telles que des lignes de prédécoupe, des liserés d'ouverture ou de décoration etc...In addition, in the context of the present invention the sachets obtained can have many characteristics complementary to those previously described, such as lines of precut, opening or decoration borders etc ...

Claims (33)

Procédé de formation et fermeture de sachets, caractérisé par le fait qu'il comprend les étapes consistant à : fournir un moyen de fermeture (100) comprenant au moins deux profilés complémentaires (112, 122) disposés sur deux voiles supports respectifs (114, 124), fournir un film support (F) destiné à composer les parois du sachet, souder (115) un voile (114) du moyen de fermeture (100) sur le film (F) au niveau de l'un au moins des bords longitudinaux dudit voile (114), le moyen de fermeture (100) étant orienté transversalement à la direction longitudinale (L) du film (F), conformer le film (F) ainsi muni du moyen de fermeture (100), sous forme d'un tube, puis souder (125) le second voile (124) du moyen de fermeture (100) sur une face opposée du film (F), au niveau d'un bord seulement dudit second voile (124). Method for forming and closing sachets, characterized in that it comprises the steps consisting in: providing a closure means (100) comprising at least two complementary profiles (112, 122) arranged on two respective support webs (114, 124), provide a support film (F) intended to compose the walls of the sachet, welding (115) a web (114) of the closure means (100) on the film (F) at at least one of the longitudinal edges of said web (114), the closure means (100) being oriented transversely to the longitudinal direction (L) of the film (F), conform the film (F) thus provided with the closure means (100), in the form of a tube, then welding (125) the second web (124) of the closure means (100) on an opposite face of the film (F), at one edge only of said second web (124). Procédé selon la revendication 1, caractérisé par le fait que les deux profilés complémentaires (112, 122) sont en prise lors de l'étape de soudure du premier voile (114) sur le film (F).Method according to claim 1, characterized in that the two complementary profiles (112, 122) are engaged during the step of welding of the first web (114) on the film (F). Procédé selon l'une des revendications 1 ou 2, caractérisé par le fait que les tronçons (T) de moyen de fermeture (100) acheminés et soudés sur le film (F) possèdent une longueur égale au maximum à la moitié de la largeur du film (F).Method according to one of claims 1 or 2, characterized by causes the sections (T) of closure means (100) routed and welded on the film (F) have a length equal to a maximum of half the film width (F). Procédé selon l'une des revendications 1 à 3, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles respectifs séparés (114, 124).Method according to one of claims 1 to 3, characterized by the that the closure means (100) comprises two sections complementary (112, 122) arranged on respective separate sails (114, 124). Procédé selon l'une des revendications 1 à 3, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles (114, 124) reliés sous forme d'une toile commune (130) de géométrie en U. Method according to one of claims 1 to 3, characterized by the that the closure means (100) comprises two sections complementary (112, 122) arranged on sails (114, 124) connected under form of a common canvas (130) of U-shaped geometry. Procédé selon la revendication 5, caractérisé par le fait que la toile en U (130) a sa convexité dirigée vers l'arrière dans le sens du déplacement (L) du film (F).Method according to claim 5, characterized in that the U-shaped fabric (130) has its convexity directed towards the rear in the direction of the displacement (L) of the film (F). Procédé selon l'une des revendications 1 à 6, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) est soudé sur le film (F) au niveau de ses deux bords longitudinaux.Method according to one of Claims 1 to 6, characterized by the fact that the first web (114) of the closure means (100) is welded to the film (F) at its two longitudinal edges. Procédé selon l'une des revendications 1 à 6, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) n'est soudé sur le film (F) que sur l'un seulement de ses bords longitudinaux.Method according to one of Claims 1 to 6, characterized by the fact that the first web (114) of the closure means (100) is not welded to the film (F) only on one of its longitudinal edges. Procédé selon la revendication 8, caractérisé par le fait que le voile (114) est soudé sur le film (F) au niveau de son bord longitudinal situé en avant en référence au sens de déplacement (L) du film (F).Method according to claim 8, characterized in that the veil (114) is welded to the film (F) at its longitudinal edge located forward with reference to the direction of movement (L) of the film (F). Procédé selon l'une des revendications 1 à 9, caractérisé par le fait que la soudure (125) réalisée sur un bord longitudinal seulement du second voile (124) est opérée sur le bord longitudinal arrière en référence au sens de déplacement (L) du film (F).Method according to one of claims 1 to 9, characterized by the causes the weld (125) made on only one longitudinal edge of the second sail (124) is operated on the rear longitudinal edge with reference in the direction of movement (L) of the film (F). Procédé selon l'une des revendications 1 à 10, caractérisé par le fait qu'il est mis en oeuvre sur une machine automatique de formation, remplissage et fermeture de type vertical.Method according to one of claims 1 to 10, characterized by the fact that it is implemented on an automatic training machine, vertical filling and closing. Procédé selon l'une des revendications 1 à 10, caractérisé par le fait qu'il est mis en oeuvre sur une machine automatique de formation, remplissage et fermeture de type horizontal.Method according to one of claims 1 to 10, characterized by the fact that it is implemented on an automatic training machine, horizontal filling and closing. Procédé selon l'une des revendications 1 à 12, caractérisé par le fait que l'étape de soudure du premier voile (114) du moyen de fermeture (100), sur le film (F), est opérée sur une machine de formation et fermeture de sacs, immédiatement en amont des moyens de formage (20), au cours d'un procédé en continu.Method according to one of claims 1 to 12, characterized by the fact that the step of welding the first web (114) of the closure means (100), on the film (F), is operated on a forming and closing machine bags, immediately upstream of the forming means (20), during a continuous process. Procédé selon l'une des revendications 1 à 12, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) est soudé sur le film (F) au cours d'une étape antérieure à la mise en oeuvre sur une machine de formation et fermeture automatique, le film (F) ainsi équipé du moyen de fermeture (100) étant conditionné avant d'être acheminé vers des moyens de formage (20) de la dite machine. Method according to one of claims 1 to 12, characterized by the fact that the first web (114) of the closure means (100) is welded to the film (F) during a stage prior to implementation on a automatic closing and forming machine, the film (F) thus equipped with the closure means (100) being conditioned before being conveyed to forming means (20) of said machine. Machine de formation et fermeture de sachets, pour la mise en oeuvre du procédé conforme à l'une des revendications 1 à 14, caractérisée par le fait qu'elle comprend : des moyens (60) adaptés pour fournir un moyen de fermeture (100) comprenant au moins deux profilés complémentaires (112, 122) disposés sur deux voiles supports respectifs (114, 124), des moyens (10) adaptés pour fournir un film support (F) destiné à composer les parois du sachet, des moyens (70) adaptés pour souder (115) un voile (114) du moyen de fermeture (100) sur le film (F) au niveau de l'un au moins des bords longitudinaux dudit voile (114), le moyen de fermeture (100) étant orienté transversalement à la direction longitudinale (L) du film (F), des moyens (20) pour conformer le film (F) ainsi muni du moyen de fermeture (100), sous forme d'un tube, puis des moyens (50) pour souder (125) le second voile (124) du moyen de fermeture (100) sur une face opposée du film (F), au niveau d'un bord seulement dudit second voile (124). Machine for forming and closing sachets, for implementing the method according to one of claims 1 to 14, characterized in that it comprises: means (60) adapted to provide a closing means (100) comprising at least two complementary profiles (112, 122) arranged on two respective support webs (114, 124), means (10) adapted to supply a support film (F) intended to compose the walls of the bag, means (70) adapted to weld (115) a web (114) of the closing means (100) on the film (F) at at least one of the longitudinal edges of said web (114), the closing means (100) being oriented transversely to the longitudinal direction (L) of the film (F), means (20) for shaping the film (F) thus provided with the closure means (100), in the form of a tube, then means (50) for welding (125) the second web (124) of the closure means (100) on an opposite face of the film (F), at an edge only of said second web (124). Machine selon la revendication 15, caractérisée par le fait qu'elle comprend : des moyens (10) d'acheminement d'un film (F) dans une direction longitudinale (L), un col de formage (20), une goulotte de remplissage (30), des moyens (40) de soudure longitudinale et des moyens (50) de soudure transversale et de séparation de sacs. Machine according to claim 15, characterized in that it comprises: means (10) for conveying a film (F) in a longitudinal direction (L), a forming neck (20), a filling chute (30), means (40) for longitudinal welding and means (50) for transverse welding and separation of bags. Machine selon la revendication 15, caractérisée par le fait qu'elle comprend : des moyens (10) d'acheminement d'un film (F) dans une direction longitudinale (L), des moyens de dépôt du produit à conditionner, sur le film (F), des moyens de formage (20) du film (F) autour du produit, des moyens (40) de soudure longitudinale et des moyens (50) de soudure transversale et de séparation de sacs. Machine according to claim 15, characterized in that it comprises: means (10) for conveying a film (F) in a longitudinal direction (L), means for depositing the product to be packaged on the film (F), means for forming (20) the film (F) around the product, means (40) for longitudinal welding and means (50) for transverse welding and separation of bags. Machine selon l'une des revendications 16 ou 17, caractérisée par le fait que les moyens de soudure adaptés pour assurer la soudure du second voile (124) sont intégrés aux moyens (50) de soudure transversale.Machine according to one of claims 16 or 17, characterized by the fact that the welding means adapted to ensure the welding of the second web (124) are integrated into the transverse welding means (50). Machine selon l'une des revendications 15 à 18, caractérisée par le fait que les moyens (60) adaptés pour acheminer des tronçons de moyen de fermeture (100) transversalement sur le film (F) et souder ledit moyen de fermeture (100) sur celui-ci comprennent un guide rectiligne (62), superposé au film (F), transversalement à celui-ci, et des moyens (64) de saisie ou de préhension qui procèdent par traction sur l'extrémité avant du moyen de fermeture (100).Machine according to one of claims 15 to 18, characterized by the fact that the means (60) adapted to convey sections of closing means (100) transversely on the film (F) and welding said closure means (100) thereon comprise a straight guide (62), superimposed on the film (F), transversely to the latter, and means (64) for gripping or gripping which proceed by pulling on the front end of the closing means (100). Film muni d'un moyen de fermeture (100) comprenant au moins deux profilés complémentaires (112, 122) disposés sur deux voiles supports respectifs (114, 124), l'un (114) des voiles du moyen de fermeture (100) étant soudé sur le film (F) au niveau de l'un au moins de ses bords longitudinaux et le moyen de fermeture (100) étant orienté transversalement à la direction longitudinale (L) du film (F), pour la mise en oeuvre du procédé conforme à l'une des revendications 1 à 14.Film provided with a closure means (100) comprising at least two complementary profiles (112, 122) arranged on two support webs respective (114, 124), one (114) of the webs of the closure means (100) being welded to the film (F) at at least one of its edges longitudinal and the closure means (100) being oriented transversely to the longitudinal direction (L) of the film (F), for the implementation of the process according to one of claims 1 to 14. Film selon la revendication 20, caractérisé par le fait que les tronçons (T) de moyen de fermeture (100) soudés sur le film (F) possèdent une longueur égale au maximum à la moitié de la largeur du film (F).Film according to claim 20, characterized in that the sections (T) of closure means (100) welded to the film (F) have a length equal to a maximum of half the width of the film (F). Film selon l'une des revendications 20 ou 21, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles respectifs séparés (114, 124).Film according to one of claims 20 or 21, characterized by that the closure means (100) comprises two sections complementary (112, 122) arranged on respective separate sails (114, 124). Film selon l'une des revendications 20 ou 21, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles (114, 124) reliés sous forme d'une toile commune (130) de géométrie en U.Film according to one of claims 20 or 21, characterized by that the closure means (100) comprises two sections complementary (112, 122) arranged on sails (114, 124) connected under form of a common canvas (130) of U-shaped geometry. Film selon l'une des revendications 20 à 23, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) est soudé sur le film (F) au niveau de ses deux bords longitudinaux. Film according to one of Claims 20 to 23, characterized by the fact that the first web (114) of the closure means (100) is welded to the film (F) at its two longitudinal edges. Film selon l'une des revendications 20 à 23, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) n'est soudé sur le film (F) que sur l'un seulement de ses bords longitudinaux.Film according to one of Claims 20 to 23, characterized by the fact that the first web (114) of the closure means (100) is not welded to the film (F) only on one of its longitudinal edges. Film selon l'une des revendications 20 à 25, caractérisé par le fait que les voiles (114, 124) du moyen de fermeture (100) sont pourvus de bourrelets longitudinaux (116, 126) au niveau des bords des voiles (114, 124) soudés sur le film (F), de préférence de bourrelets (116, 126) effilés en éloignement du voile (114, 124), par exemple de bourrelets de section droite globalement triangulaire, ou encore de couches localisées de matériau facilitant la soudure des voiles (114, 124) à ce niveau.Film according to one of Claims 20 to 25, characterized by the fact that the webs (114, 124) of the closure means (100) are provided with longitudinal beads (116, 126) at the edges of the webs (114, 124) welded to the film (F), preferably beads (116, 126) tapered in distance from the web (114, 124), for example from section beads globally triangular line, or localized layers of material facilitating the welding of the sails (114, 124) at this level. Sachet obtenu par la mise en oeuvre du procédé conforme à l'une des revendications 1 à 14, caractérisé par le fait qu'il est formé d'un film (F) muni d'un moyen de fermeture (100) comprenant au moins deux profilés complémentaires (112, 122) disposés sur deux voiles supports respectifs (114, 124), un voile (114) du moyen de fermeture (100) étant soudé sur le film (F) au niveau de l'un au moins de ses bords longitudinaux, le moyen de fermeture (100) étant orienté transversalement à la direction longitudinale (L) du film (F), et le second voile (124) du moyen de fermeture (100) étant soudé sur une face opposée du film (F), au niveau d'un bord seulement dudit second voile (124).Bag obtained by implementing the process in accordance with one of claims 1 to 14, characterized in that it is formed of a film (F) provided with a closure means (100) comprising at least two complementary profiles (112, 122) arranged on two support webs respective (114, 124), a web (114) of the closure means (100) being welded to the film (F) at at least one of its longitudinal edges, the closure means (100) being oriented transversely to the direction longitudinal (L) of the film (F), and the second web (124) of the closure means (100) being welded on an opposite face of the film (F), at an edge only said second veil (124). Sachet selon la revendication 27, caractérisé par le fait que les tronçons (T) de moyen de fermeture (100) soudés sur le film (F) possèdent une longueur égale au maximum à la moitié de la largeur du film (F).Bag according to claim 27, characterized in that the sections (T) of closure means (100) welded to the film (F) have a length equal to a maximum of half the width of the film (F). Sachet selon l'une des revendications 27 ou 28, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles respectifs séparés (114, 124).Bag according to one of claims 27 or 28, characterized by the fact that the closure means (100) comprises two sections complementary (112, 122) arranged on respective separate sails (114, 124). Sachet selon l'une des revendications 27 ou 28, caractérisé par le fait que le moyen de fermeture (100) comprend deux profilés complémentaires (112, 122) disposés sur des voiles (114, 124) reliés sous forme d'une toile commune (130) de géométrie en U. Bag according to one of claims 27 or 28, characterized by the fact that the closure means (100) comprises two sections complementary (112, 122) arranged on sails (114, 124) connected under form of a common canvas (130) of U-shaped geometry. Sachet selon l'une des revendications 27 à 30, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) est soudé sur le film (F) au niveau de ses deux bords longitudinaux.Bag according to one of claims 27 to 30, characterized by the fact that the first web (114) of the closure means (100) is welded to the film (F) at its two longitudinal edges. Sachet selon l'une des revendications 27 à 31, caractérisé par le fait que le premier voile (114) du moyen de fermeture (100) n'est soudé sur le film (F) que sur l'un seulement de ses bords longitudinaux.Bag according to one of claims 27 to 31, characterized by the fact that the first web (114) of the closure means (100) is not welded on the film (F) only on one of its longitudinal edges. Sachet selon l'une des revendications 27 à 32, caractérisé par le fait que les voiles (114, 124) du moyen de fermeture (100) sont pourvus de bourrelets longitudinaux (116, 126) au niveau des bords des voiles (114, 124) soudés sur le film (F), de préférence de bourrelets (116, 126) effilés en éloignement du voile (114, 124), par exemple de bourrelets de section droite globalement triangulaire, ou encore de couches localisées de matériau facilitant la soudure des voiles (114, 124) à ce niveau.Bag according to one of claims 27 to 32, characterized by the fact that the webs (114, 124) of the closure means (100) are provided longitudinal beads (116, 126) at the edges of the webs (114, 124) welded to the film (F), preferably beads (116, 126) tapered in distance from the web (114, 124), for example from section beads globally triangular line, or localized layers of material facilitating the welding of the sails (114, 124) at this level.
EP98402426A 1997-10-03 1998-10-02 Method and machine for the automatic manufacture of bags, as well as the bags thus obtained Withdrawn EP0906866A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712330A FR2769288B1 (en) 1997-10-03 1997-10-03 AUTOMATIC BAGS MANUFACTURING PROCESS, MACHINE FOR THIS PURPOSE AND BAGS OBTAINED
FR9712330 1997-10-03

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EP0906866A1 true EP0906866A1 (en) 1999-04-07

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US (1) US6131374A (en)
EP (1) EP0906866A1 (en)
AU (1) AU750102B2 (en)
CA (1) CA2249848C (en)
FR (1) FR2769288B1 (en)
NZ (1) NZ332139A (en)

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Also Published As

Publication number Publication date
FR2769288A1 (en) 1999-04-09
NZ332139A (en) 1999-07-29
US6131374A (en) 2000-10-17
AU750102B2 (en) 2002-07-11
CA2249848C (en) 2004-06-15
FR2769288B1 (en) 1999-12-24
AU8790098A (en) 1999-04-22
CA2249848A1 (en) 1999-04-03

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