WO2005102679A1 - Machine for fixing an opening/closing system to a film used to produce packaging bags - Google Patents

Machine for fixing an opening/closing system to a film used to produce packaging bags Download PDF

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Publication number
WO2005102679A1
WO2005102679A1 PCT/FR2005/000633 FR2005000633W WO2005102679A1 WO 2005102679 A1 WO2005102679 A1 WO 2005102679A1 FR 2005000633 W FR2005000633 W FR 2005000633W WO 2005102679 A1 WO2005102679 A1 WO 2005102679A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
closing
machine according
film
closing system
Prior art date
Application number
PCT/FR2005/000633
Other languages
French (fr)
Inventor
Jean-Pierre Barbier
Eric Barbier
Original Assignee
Morance Soudure
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 Morance Soudure filed Critical Morance Soudure
Priority to EP05739458A priority Critical patent/EP1727668A1/en
Publication of WO2005102679A1 publication Critical patent/WO2005102679A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • 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
    • 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

Definitions

  • the present invention relates to a machine for fixing opening / closing systems on a film intended in particular for the manufacture of packaging bags as well as a film obtained by the use of this machine. It is known from document FR 2 833 576 to use opening / closing systems for packaging bags comprising a flat base part at least partially delimiting an opening therethrough, this base part comprising guide means capable of receiving a slide making it possible to close the opening or to leave it free, the flat base part being intended to be fixed to the wall of the bag so that the opening which it delimits coincides with a fitted opening in the wall of the bag.
  • the fixing of such systems on bags can be carried out in various ways by gluing or heat welding.
  • the object of the present invention is to allow fixing of the opening / closing systems of the type mentioned above, by guaranteeing this closing on a unwinding film, in particular of the reel-to-reel type, thus guaranteeing an improved fixing rate and precise positioning. opening / closing systems.
  • the subject of the present invention is a machine for fixing opening / closing systems, in particular for packaging bags, of the type comprising a flat base part at least partially delimiting an opening through it, this part of base comprising guide means parallel to the opening which can receive a slide allowing to close it or leave the opening free, machine characterized in that it comprises: - means making it possible to scroll a film in a running direction, - at least one loading station for opening / closing systems , a station for fixing the opening / closing systems to the film, and means for conveying the opening / closing systems between the stations, comprising means making it possible to control the position of the opening / closing systems, the film running being carried out step by step, the fixing station fixing an opening / closing system when the film running is interrupted.
  • the fixing station comprises means for depositing an opening / closing system on the film from conveying means, as well as means for fixing the opening / closing system.
  • the removal means consist of a member rotating in rotation about an axis parallel to the plane of the film and comprising at least two radial locations making it possible to maintain an opening / closing system by a contact force in position.
  • the locations include an opening making it possible to apply a suction force constituting a contact force making it possible to hold an opening / closing system in position.
  • the fixing means comprise a welding tool located on the side of the film opposite to the removal means, the welding tool being movable in translation along an axis perpendicular to the plane of the film to weld the film with a system. opening / closing, by pressing against a radial location of the depositing member.
  • the depositing member comprises four radial locations for holding the opening / closing systems in position.
  • the conveyor means comprise a first belt conveyor comprising two bands of conveying allowing the opening / closing systems located between the strips to be moved, the two transverse edges of the base part of an opening / closing system cooperating respectively with the two strips.
  • At least one strip comprises at least two ribs making it possible to accommodate between them the transverse edge of an opening / closing system.
  • the machine comprises a push cylinder situated opposite the depositing member and on the other side of the first belt conveyor, making it possible to push an opening / closing system located between the conveyor belts on a radial location for holding the removal member in position, the part of the actuator forming a pusher being able to pass between the two belts of the first belt conveyor.
  • the means making it possible to control the position of the opening / closing systems include blocking means arranged on the conveying means, in order to stop or allow the opening / closing systems to pass.
  • the blocking means consist of at least one jack arranged perpendicular to the direction of conveying of the opening / closing systems, at the level of the first belt conveyor.
  • the conveyor belts are arranged one above the other, the lowest band being longer upstream of the conveying direction by at least one length of an opening / closing system. .
  • the loading station for opening / closing systems comprises a magazine comprising at least one compartment in which opening / closing systems are intended to be positioned in a row, the width of which is substantially corresponding to the width of an opening / closing system, delimited laterally by substantially vertical walls, and arranged above a support and drive belt in the direction of the length of the compartment, each compartment having means at its end vertical displacement drive for an opening / closing system located at the end of the compartment.
  • a movable and removable wedge is arranged in at least one compartment, subjected to a restoring force making it possible to press the row of opening / closing system against the end comprising the means for driving in vertical displacement.
  • the restoring force is exerted by a roller in sliding support against the wedge and in support on two ramps formed on the walls of the compartment, ramps oriented towards the end of the compartment comprising the moving drive means vertical.
  • the means for driving in vertical displacement consist of a jack provided with a thrust portion which makes it possible to drive the opening / closing system located at the end of the compartment towards flat conveying means .
  • the means for driving in vertical displacement comprise at least one jack provided with a movable portion comprising suction means making it possible to hold in position at least one opening / closing system.
  • the means for driving in vertical displacement comprise a gripping device comprising at least two tabs cooperating with the edges of an opening / closing device, as well as means for driving in a substantially parallel direction to the axis of the row of opening / closing systems and means for driving in vertical displacement, in particular of the jack type.
  • the flat conveying means comprise at least one roller and / or conveyor belts making it possible to drive opening / closing systems in parallel, the base part being disposed flat against these means of conveying, to a substantially horizontal drive portion and limited by a stop wall.
  • the conveyor means further comprise at least one endless chain provided with catches making it possible to drive the opening / closing systems parallel to the direction of the abutment wall, in order to bring them successively to the end of the chain travel on the portion of the lower conveyor belt not facing the upper conveyor belt, this portion being surrounded by two vertical positioning guides for an opening / closing system.
  • a station for pre-cutting an external bag opening is disposed upstream from the station for fixing the opening / closing systems, in the direction of travel of the film.
  • the film is initially stored in the form of a reel.
  • the film after fixing an opening / closing system, is wound in the form of a reel.
  • the present invention also relates to a film for a packaging bag, characterized in that it is equipped with at least one opening / closing system of the type comprising a flat base part at least partially delimiting an opening through it , this basic part comprising guide means parallel to the opening that can receive a slide making it possible to close or leave free the opening, this system being disposed opposite a pre-cut forming a detachable strip and that it is packaged in the form of a reel.
  • Figure 1 shows an opening / closing system attached to a bag in perspective and in partial section.
  • Figure 2 is a sectional view along ll-ll of Figure 1.
  • Figure 3 is a perspective view of a film showing schematically a pre-cut and the fixing of an opening / closing system on a pre cutting.
  • Figure 4 is a top view of an embodiment of the machine according to the invention.
  • Figure 5 is a detail view on an enlarged scale in section along IV-IV of Figure 4.
  • Figure 6 is a front view of the machine of Figure 4.
  • Figure 7 is a side view of the machine of Figure 4 8 is a detailed view from the rear of the end of the magazine and of the means for driving in vertical displacement, according to an alternative embodiment.
  • Figure 9 is a top view of the detail of Figure 8.
  • Figures 1 and 2 show a bag 2 has two walls 3 fixed to one another, one of these walls 3 having a precut 4 defining a strip 5, and comprises an opening / closing system 6 fixed on its internal face below this strip 5, as shown in FIG. 2.
  • the strip 5 has rounded ends, which are cut and which can thus be raised and seized to allow the removal of this strip 5 by manual traction.
  • the opening / closing system 6 comprises a flat base part 7 at least partially delimiting an opening 8 through it, this base part 7 comprising guide means, not shown, in parallel at the opening which can receive a slide 9 making it possible to close or leave free the opening 8.
  • the base part is fixed to the wall 3 outside the area delimited by the precut 4, in order to remain united of the bag after removal of the strip 5.
  • a user can therefore, during the first use, remove the strip 5 by manual traction, then open and close the bag by moving the slider 9 transversely to the base part 7.
  • the machine for fixing opening systems 6 makes it possible to fix these systems 6 to a film 9 intended to form the wall 3 of packaging bags 2, according to the principle illustrated in f igure 3.
  • the film advances in a direction of travel D, firstly a precut 4 is made on the film 10, then an opening / closing system 6 is fixed at this precut 4, the slider 9 being located between the film 10 and the base part 7 fixed to the film 10.
  • the machine for fixing the opening / closing systems 6, represented in FIGS.
  • 4 to 7 comprises: - means not shown making it possible to scroll a film 10 according to a direction of travel D, from a reel 12, - a station 13 for loading opening / closing systems 6, - a station 14 for fixing the opening / closing systems 6 on the film, and - means for conveying the opening / closing systems between stations.
  • the film 10 is scrolled step by step, the fixing station 14 securing an opening / closing system 6 when the film 10 is interrupted.
  • the loading station 13 for the opening / closing systems 6 visible in FIGS.
  • each compartment 16 having at one end drive means 19 in vertical displacement for an opening / closing system 6 located at this end.
  • the opening / closing systems 6 are intended to be positioned parallel, in row R, vertically in the direction of their greatest length, the face of the flat base of an opening / closing system not comprising a directed slide. towards the end of the compartment comprising the drive means 19 in vertical displacement.
  • a mobile and removable wedge 20 is disposed in each compartment 16, at the end of the row, making it possible to press the row against the end comprising the drive means 19 in vertical displacement.
  • This wedge 20 is subjected to a stress by a sliding support against a roller 22 which is supported on two ramps formed on the walls 17 of the compartment 16, these ramps being inclined towards the end of the compartment 16 comprising the drive means 19 in vertical displacement.
  • the drive means 19 are constituted by a jack 23 provided with a thrust portion 24 which makes it possible to drive the opening / closing system 6 situated at the end of the compartment towards flat conveying means 25 of the systems opening / closing 6. It should be noted that in the embodiment shown, a single jack 23 is used to drive the opening / closing systems located at the end of each compartment 16.
  • the drive means 19 for vertical displacement are constituted by a jack provided with a movable portion comprising suction means of the suction cup type which make it possible to maintain an opening / closing system 6 in contact by suction, and to drive this until contact with the flat conveying means 25.
  • an additional non-return roller movable in rotation only in the driving direction of the flat conveying means 25, is arranged opposite the strip 27, making it possible to press the opening / closing system 6 against the strip 27 when that is positioned by the vertical displacement drive means 19 between this additional roller and the strip 27, so as not to damage the suction cups by driving the opening / closing system 6, allowing the suction and flat conveying means 25 to operate alternately, the opening / closing system 6 being held in position by the additional roller between these two operating phases.
  • the means for driving in vertical displacement 19 comprise: - a first jack, not shown, making it possible to lift the system up to the flat conveying means 25, associated with - a second jack making it possible to move in the direction of the row R of the opening / closing system 6, and - a gripping device 50 comprising at least one first tab 52 cooperating with a first lateral edge of an opening / closing system 6 and a second tab 53 cooperating with the second lateral edge of an opening / closing system 6, the two legs 52, 53 being able to come together in order to grip an opening / closing system 6 at the end of the row R
  • the two legs 52, 53 form between them a concave surface 54 allowing the support of the base part 7 and the legs 52, 53 have an orientation towards this concave surface 54, so that when the s legs 52, 53, the opening / closing system 6 is slightly curved transversely and held in position between the legs 52, 53 and the concave surface 54.
  • the wall 17 of the compartments 16 has a cutout 55 at its end, allowing the passage of the gripping device 50.
  • the gripping device 50 is unique for all of the compartments 16, all of the tabs 52 intended to cooperate with a first lateral edge of an opening / closing system 6 being integral, and respectively the assembly of the legs 53 intended for cooperate with a second lateral edge of an opening / closing system 6 being integral, in particular in the form of two superimposed plates 56, 57.
  • the flat conveying means 25 comprise a first roller 26 and a band 27 located on either side of the path of the opening / closing systems 6 and making it possible to drive these from the end of each of the compartments 16 , in parallel, to a substantially horizontal drive portion 28 comprising rollers 29 driving the opening / closing systems 6 to a stop wall 30.
  • the conveying means further comprise two endless chains 32 parallel provided with lugs 33 making it possible to drive the opening / closing systems parallel to the direction of the abutment wall 30 in a driving direction F.
  • the lugs 33 on the two chains 32 are located opposite and in such a way that the systems coming from the end of each compartment 16 are housed in parallel respectively in successive intervals between two pairs of cleats 33 located on the two chains 30.
  • each opening / closing system 6 is successively deposited by its transverse edge on the low conveyor belt 34, which is oriented and driven perpendicular to the drive direction F of the chain, in a conveyor direction G.
  • Each opening / closing system 6 is therefore driven between the vertical positioning guides 35, 36 by the low conveyor belt 34.
  • a second high conveyor belt 38 is d is placed above the lower conveyor belt 34, at the end of the positioning guides located downstream in the conveying direction G.
  • the upper 38 and lower 34 conveyor belts thus form a belt conveyor 39 making it possible to move the opening systems 6 located between the belts, the two transverse edges of the part base 7 of an opening / closing system 6 cooperating respectively with the two strips 34 and 38.
  • Each strip 34, 38 has two ribs 40 making it possible to accommodate between them the transverse edge of an opening / closing system 6
  • each opening / closing system 6 is driven in the conveying direction G, the belts advancing continuously.
  • blocking means are arranged on the belt conveyor 39, in order to be able to stop or let pass the opening systems /closing.
  • These locking means are constituted by jacks 42 arranged perpendicular to the direction of conveying of the opening / closing systems.
  • the fixing station 14 is located near the end of the belt conveyor 39, in the conveying direction G, and laterally with respect thereto.
  • a push cylinder 43 is disposed opposite the fixing station 14 and on the other side of the belt conveyor 39 relative to the fixing station 14, making it possible to push an opening / closing system 6 located between the conveyor belts 34 , 38 in a position where the fixing station 14 is kept in position, the part of the actuator forming a pusher being able to pass between the two bands 34, 38 of the conveyor 39, as illustrated in FIG. 5
  • the fixing station 14 comprises: means for depositing an opening / closing system on the film from conveying means, and means for fixing the opening / closing system 6.
  • the depositing means are constituted by a member 44 rotating in rotation around an axis A parallel to the plane of the film 10 and comprising radial locations 45 each making it possible to maintain, by a contact force, an opening / closing system 6 in position.
  • each location 45 has an opening 46 connected to suction means (not shown) making it possible to apply a suction force constituting the contact force making it possible to hold an opening / closing system 6 in contact with the 'location 45.
  • the fixing means comprise a welding tool 47 located on the side of the film opposite to the removal means, the welding tool 47 being movable in translation along an axis B perpendicular to the plane of the film 10 to weld the film 10 and an opening / closing system 6, bearing against a location 45 of the depositing member 44.
  • the depositing member has four locations 45 for holding the opening systems in position / closure 6.
  • the machine further comprises a pre-cutting station 48, making it possible to make the pre-cutting 4 described above, arranged upstream of the fixing station 14 of opening / closing systems 6, in the direction of travel D of the film 10.
  • this pre-cutting station 48 is located at a distance from the fixing station 14 corresponding substantially to the multiple of the length of a bag.
  • the film after fixing an opening / closing system by the fixing station 14, is again wound up in the form of a reel 49.
  • the supply of the fixing station 14 with opening / closing systems 6 by the machine described above proceeds as follows.
  • An operator or appropriate mechanical means load the opening / closing systems 6 in the form of rows R in the compartments of the magazine, by moving the movable wedge 20 apart.
  • the compartments 16 of the magazine 15 make it possible to form thus, in this embodiment , six rows of opening / closing systems.
  • the drive means 19 in vertical displacement are movable between a low position and a high position. They allow, at each of their mounted phases, to supply the flat conveying means 25 with six opening / closing systems in parallel, which were arranged at the end of each of the rows R housed in the compartments 16.
  • the opening / closing systems 6 are arranged flat on the drive portion 28 and abut against the abutment wall 30, each system housed between two pairs of lugs 33 belonging to the chains 30, the opening / closing systems 6 being always parallel and flat on the support constituted by the rollers 29.
  • the chains 32 are stationary during this operation, and the lugs 33 are positioned so that it is not located on the path of the opening / closing systems 6, they are for example in the extension of the walls 17 of the compartments 16 of the magazine 15.
  • the chains are then driven, to deposit successively the systems, by their transverse edge, on the conveyor 39.
  • the opening / closing systems 6 are then driven towards the fixing station 14.
  • the locking means 42 make it possible to precisely control the position of the opening / closing systems 6 and to place these opposite the push cylinder 43 to push them towards the depositing member 44.
  • This arrangement of the magazine and of the conveying means allows on the one hand a mo fixing step by step and on the other hand to obtain a high rate of supply of the fixing station because: the magazine 15 can be reloaded in parallel in each compartment 16, the opening / closing systems 6 then being grouped together towards a conveyor 39 driving them sequentially.
  • the positioning of the opening / closing systems 6 on the conveyor 39 is controlled, which allows a high speed of the conveyor 39 while maintaining sufficient precision.
  • the film D is scrolled in step-by-step mode.
  • the film advances by a distance substantially corresponding to the length of a bag.
  • the fixing station 14 then allows the fixing of a closing opening system on the film.
  • the precut station 48 performs a precut 4.
  • the arrangement of the precut station at a distance multiple of the length of a bag allows this simple operation, in parallel, of the precut stations 48 and fixing 14.
  • the fixing thus produced has the following advantages.
  • the fixing of opening / closing systems 6 on the film 10 prior to the manufacture of the bags 3 makes it possible to simplify the latter.
  • This arrangement is advantageous in that it makes it possible to provide a film already comprising fixed aperture systems, this film being able to be used on a machine of known type enabling the packaging bag to be formed from a film.
  • each bag 3 can be formed simply by unwinding the reel 49, by first folding the film 10 parallel to its direction of travel to form the walls of the bag 2, then by making connections and cuts perpendicular to this direction of travel.
  • the invention is not limited to the preferred embodiments described above, by way of nonlimiting examples; on the contrary, it embraces all of the variant embodiments thereof within the scope of the claims below.

Abstract

A machine for fixing opening/closing systems (6), particularly for packaging bags (2), comprising a planar base part defining at least partially an opening (8) therethrough, said base part comprising means for guidance parallel to the opening (8) and which can receive a slide (9) making it possible to close or leave the opening (8) open. The machine is characterized in that it comprises means for reeling off a film (10) in a reeling direction (D); at least one charging station (13) for the opening/closing systems (6); a station (14) for fixing the opening/closing systems (6) to the film (10); means for conveying (25, 28, 32, 38) the opening/closing systems (6) between said stations (13, 14), comprising means (42) which make it possible to control the position of the opening/closing systems (6), wherein the film is reeled off (D) gradually and the fixing station (14) ensures fixing of an opening/closing system (6) when the reeling off of the film (D) is interrupted.

Description

MACHINE DE FIXATION DE SYSTEME D'OUVERTURE/FERMETURE SUR UN FILM DESTINE A LA FABRICATION DE SACS D'EMBALLAGE MACHINE FOR FIXING OPENING / CLOSING SYSTEM ON A FILM FOR THE MANUFACTURE OF PACKAGING BAGS
La présente invention concerne une machine de fixation de systèmes d 'ouverture/fermeture sur un film destiné notamment à la fabrication de sacs d'emballage ainsi qu'un film obtenu par l'utilisation de cette machine. Il est connu par le document FR 2 833 576 d'utiliser des systèmes d'ouverture/fermeture de sacs d'emballage comprenant une pièce de base plane délimitant au moins partiellement une ouverture à travers elle, cette pièce de base comportant des moyens de guidage pouvant recevoir un coulisseau permettant d'obturer l'ouverture ou de laisser libre celle-ci, la pièce de base plane étant destinée à être fixée à la paroi du sac de telle sorte que l'ouverture qu'elle délimite coïncide avec une ouverture aménagée dans la paroi du sac. La fixation de tels systèmes sur des sacs peut être réalisée de diverses façons par collage ou thermo soudage. Il apparaît toutefois que la fixation de tels systèmes ne peut être réalisée en ligne sur un film ininterrompu avec les machines utilisées actuellement pour la fixation de fermeture utilisant des bandes profilées inter bloquantes, notamment du type décrit dans le document EP 0 843 636. En effet, ce type de machine est adapté pour la fixation de systèmes d'ouverture/fermeture qui sont découpés dans des bandes continues puis fixés sur un film. Ce type de disposition ne permet pas de réaliser la fixation de systèmes d'ouverture/fermeture du type décrit ci-dessus, chaque systèmes d'ouverture/fermeture constituant une pièce séparée devant être positionnée de façon précise à un emplacement du film correspondant à une ouverture de sac. La présente invention a pour but de permettre une fixation des systèmes d'ouverture/fermeture du type cité dessus, en garantissant cette fermeture sur un film se déroulant, notamment de type bobine à bobine, garantissant ainsi une cadence de fixation améliorée et un positionnement précis des systèmes d'ouverture/fermeture. A cet effet, la présente invention a pour objet une machine de fixation de systèmes d'ouverture/fermeture, notamment pour sacs d'emballage, du type comportant une pièce de base plane délimitant au moins partiellement une ouverture à travers elle, cette pièce de base comportant des moyens de guidage parallèlement à l'ouverture pouvant recevoir un coulisseau permettant de l'obturer ou de laisser libre l'ouverture, machine caractérisée en ce qu'elle comporte : - des moyens permettant de faire défiler un film selon une direction de défilement, - au moins un poste de chargement de systèmes d'ouverture/fermeture, - un poste de fixation des systèmes d'ouverture/fermeture sur le film, et - des moyens de convoyage des systèmes d'ouverture/fermeture entre les postes, comprenant de moyens permettant de contrôler la position des systèmes d'ouverture/fermeture, le défilement du film étant réalisé pas à pas, le poste de fixation réalisant la fixation d'un système d'ouverture/fermeture lorsque le défilement du film est interrompu. Avantageusement, le poste de fixation comporte des moyens de dépose d'un système d'ouverture/fermeture sur le film à partir de moyens de convoyage, ainsi que des moyens de fixation du système d'ouverture/fermeture. Selon un mode de réalisation, les moyens de dépose sont constitués par un organe tournant en rotation autour d'un axe parallèle au plan du film et comportant au moins deux emplacements radiaux permettant de maintenir par une force de contact un système d'ouverture/fermeture en position. Avantageusement, les emplacements comportent une ouverture permettant d'appliquer une force d'aspiration constituant une force de contact permettant de maintenir en position un système d'ouverture/fermeture. Selon un mode de réalisation, les moyens de fixation comportent un outil de soudure situé du coté du film opposé aux moyens de dépose, l'outil de soudure étant mobile en translation selon un axe perpendiculaire au plan du film pour souder le film avec un système d'ouverture/fermeture, en prenant appui contre un emplacement radial de l'organe de dépose. Avantageusement, l'organe de dépose comporte quatre emplacements radiaux de maintien en position de systèmes d'ouverture/fermeture. Selon un mode de réalisation, les moyens de convoyage comportent un premier convoyeur à bande comprenant deux bandes de convoyage permettant de déplacer les systèmes d'ouverture/fermeture situés entre les bandes, les deux bords transversaux de la pièce de base d'un système d'ouverture/fermeture coopérant respectivement avec les deux bandes. Avantageusement, au moins une bande comporte au moins deux nervures permettant de loger entre elles le bord transversal d'un système d'ouverture/fermeture. Selon un mode de réalisation, la machine comporte un vérin poussoir situé en regard de l'organe de dépose et de l'autre coté du premier convoyeur à bande, permettant de pousser un système d'ouverture/fermeture situé entre les bandes de convoyage sur un emplacement radial de maintien en position de l'organe de dépose, la partie du vérin formant poussoir pouvant passer entre les deux bandes du premier convoyeur à bande. Avantageusement, les moyens permettant de contrôler la position des systèmes d'ouverture/fermeture comportent des moyens de blocage disposés sur les moyens de convoyage, afin de stopper ou de laisser passer les systèmes d'ouverture/fermeture. Selon un mode de réalisation, les moyens de blocage sont constitués par au moins un vérin disposé perpendiculairement au sens de convoyage des systèmes d'ouverture/fermeture, au niveau du premier convoyeur à bande. Avantageusement, les bandes de convoyages sont disposées l'une au dessus de l'autre, la bande la plus basse étant plus longue vers l'amont de la direction de convoyage d'au moins une longueur d'un système d'ouverture/fermeture. Selon un mode de réalisation, le poste de chargement des systèmes d'ouverture/fermeture comporte un magasin comprenant au moins un compartiment dans lequel des systèmes d'ouverture/fermeture sont destinés à être positionnés en rangée, dont la largeur est sensiblement correspondante à la largeur d'un système d'ouverture/fermeture, délimité latéralement par des parois sensiblement verticales, et disposé au dessus d'un tapis de support et d'entraînement selon la direction de la longueur du compartiment, chaque compartiment présentant à son extrémité des moyens d'entraînement en déplacement vertical pour un système d'ouverture/fermeture situé à l'extrémité du compartiment. Avantageusement, une cale mobile et amovible est disposée dans au moins un compartiment, soumise à une force de rappel permettant de presser la rangée de système d'ouverture/fermeture contre l'extrémité comportant les moyens d'entraînement en déplacement vertical. Selon un mode de réalisation, la force de rappel est exercée par un rouleau en appui glissant contre la cale et en appui sur deux rampes ménagées sur les parois du compartiment, rampes orientées vers l'extrémité du compartiment comportant les moyens d'entraînement en déplacement vertical. Selon une possibilité, les moyens d'entraînement en déplacement vertical sont constitués par un vérin muni d'une portion de poussée qui permet d'entraîner le système d'ouverture/fermeture situé à l'extrémité du compartiment vers des moyens de convoyage à plat. Selon une autre possibilité, les moyens d'entraînement en déplacement vertical comportent au moins un vérin muni d'une portion mobile comprenant des moyens d'aspiration permettant de maintenir en position au moins un système d'ouverture/fermeture. Selon encore une autre possibilité, les moyens d'entraînement en déplacement vertical comprennent un dispositif de préhension comportant au moins deux pattes coopérant avec les bords d'un dispositif d'ouverture/fermeture, ainsi que des moyens d'entraînement dans une direction sensiblement parallèle à l'axe de la rangée de systèmes d'ouverture/fermeture et des moyens d'entraînement en déplacement vertical, notamment du type vérin. Selon un mode de réalisation, les moyens de convoyage à plat comprennent au moins un rouleau et/ou des bandes de convoyage permettant d'entraîner des systèmes d'ouverture/fermeture en parallèle, la pièce de base étant disposée à plat contre ces moyens de convoyage, jusqu'à une portion d'entraînement sensiblement horizontale et limitée par une paroi de butée. Avantageusement, les moyens de convoyage comportent de plus, au moins une chaîne sans fin munie de taquets permettant d'entraîner les- systèmes d'ouverture/fermeture parallèlement à la direction de la paroi de butée, afin de les amener successivement, à l'extrémité de la course de la chaîne sur la portion de la bande de convoyage basse n'étant pas en regard de la bande de convoyage haute, cette portion étant entourée de deux guides de positionnement vertical pour un système d'ouverture/fermeture. Selon un mode de réalisation, un poste de pré découpage d'une ouverture extérieure de sac est disposé en amont du poste de fixation de systèmes d'ouvertures/fermeture, dans le sens de défilement du film. Avantageusement, le film est initialement stocké sous forme d'une bobine. Selon un mode de réalisation, le film, après fixation d'un système d'ouverture/fermeture, est enroulé sous forme de bobine. La présente invention porte également sur un film pour sac d'emballage, caractérisée en ce qu'il est équipé d'au moins un système d'ouverture/fermeture du type comportant une pièce de base plane délimitant au moins partiellement une ouverture à travers elle, cette pièce de base comportant des moyens de guidage parallèlement à l'ouverture pouvant recevoir un coulisseau permettant de d'obturer ou de laisser libre l'ouverture, ce système étant disposé en regard d'une pré découpe formant une bande détachable et qu'il est conditionné sous forme d'une bobine. La présente invention sera mieux comprise à la lecture de la description suivante, en référence aux dessins annexés représentant un mode de réalisation d'un dispositif de fixation selon l'invention. La figure 1 représente un système d'ouverture/fermeture fixé sur un sac en perspective et en coupe partielle. La figure 2 est une vue en coupe selon ll-ll de figure 1. La figure 3 est une vue en perspective d'un film présentant de façon schématique une pré découpe et la fixation d'un système d'ouverture/fermeture sur une pré découpe. La figure 4 est une vue de dessus d'un mode de réalisation de la machine selon l'invention. La figure 5 est une vue de détail à échelle agrandie en coupe selon IV-IV de figure 4. La figure 6 est une vue de face de la machine de figure 4. La figure 7 est une vue de coté de la machine de figure 4. La figure 8 est une vue de détail par l'arrière de l'extrémité du magasin et des moyens d'entraînement en déplacement vertical, selon une variante de réalisation. La figure 9 est une vue de dessus du détail de figure 8. Les figures 1 et 2 montrent un sac 2 comporte deux parois 3 fixées l'une à l'autre, l'une de ces parois 3 présentant une prédécoupe 4 délimitant une bande 5, et comporte un système d'ouverture/fermeture 6 fixé sur sa face interne en dessous de cette bande 5, ainsi que le montre la figure 2. La bande 5 a des extrémités arrondies, qui sont découpées et qui peuvent ainsi être soulevées et saisies pour permettre le retrait de cette bande 5 par traction manuelle. Comme le montre plus particulièrement la figure 2, le système d'ouverture/fermeture 6 comprend une pièce de base 7 plane délimitant au moins partiellement une ouverture 8 à travers elle, cette pièce de base 7 comportant des moyens de guidage, non représentés, parallèlement à l'ouverture pouvant recevoir un coulisseau 9 permettant de d'obturer ou de laisser libre l'ouverture 8. La pièce de base est fixée sur la paroi 3 à l'extérieur de la zone délimitée par la prédécoupe 4, afin de rester solidaire du sac après enlèvement de la bande 5. Un utilisateur peut donc, lors de la première utilisation, enlever la bande 5 par traction manuelle, puis ouvrir et refermer le sac en déplaçant le coulisseau 9 transversalement par rapport à la pièce de base 7. La machine de fixation de systèmes d'ouverture 6 selon l'invention permet de réaliser la fixation de ces systèmes 6 sur un film 9 destiné à former la paroi 3 de sacs d'emballage 2, selon le principe illustré à la figure 3. Le film avance selon une direction de défilement D, dans un premier temps une prédécoupe 4 est réalisée sur le film 10, puis un système d'ouverture/fermeture 6 est fixé au niveau de cette prédécoupe 4, le coulisseau 9 étant situé entre le film 10 et la pièce de base 7 fixée au film 10. La machine de fixation de systèmes d'ouverture/fermeture 6, représentée sur les figures 4 à 7 comporte : - des moyens non représentés permettant de faire défiler un film 10 selon une direction de défilement D, à partir d'une bobine 12, - un poste 13 de chargement de systèmes d'ouverture/fermeture 6, - un poste 14 de fixation des systèmes d'ouverture/fermeture 6 sur le film, et - des moyens de convoyage des systèmes d'ouverture/fermeture entre les postes. Le défilement du film 10 est réalisé pas à pas, le poste de fixation 14 réalisant la fixation d'un système d'ouverture/fermeture 6 lorsque le défilement du film 10 est interrompu. Le poste de chargement 13 des systèmes d'ouverture/fermeture 6 visible sur les figures 4 et 7 comporte un magasin 15 comportant une pluralité de compartiments 16, dont la largeur sensiblement correspond à la largeur d'un système d'ouverture/fermeture 6, délimité latéralement par des parois 17 sensiblement verticales, et disposé au dessus d'un tapis de support et d'entraînement 18 selon la direction E de la longueur du compartiment, chaque compartiment 16 présentant à une extrémité des moyens d'entraînement 19 en déplacement vertical pour un système d'ouverture/fermeture 6 situé à cette extrémité. Les systèmes d'ouverture/fermeture 6 sont destinés à être positionnés parallèlement, en rangée R, verticalement dans le sens de leur plus grande longueur, la face de la base plane d'un système d'ouverture/fermeture ne comportant pas de coulisseau dirigée vers l'extrémité du compartiment comportant les moyens d'entraînement 19 en déplacement vertical. Une cale 20 mobile et amovible est disposée dans chaque compartiment 16, à l'extrémité de la rangée, permettant de presser la rangée contre l'extrémité comportant les moyens d'entraînement 19 en déplacement vertical. Cette cale 20 est soumise à une contrainte par un appui glissant contre un rouleau 22 qui est en appui sur deux rampes ménagées sur les parois 17 du compartiment 16, ces rampes étant inclinées vers l'extrémité du compartiment 16 comportant les moyens d'entraînement 19 en déplacement vertical. Les moyens d'entraînement 19 sont constitués par un vérin 23 muni d'une portion de poussée 24 qui permet d'entraîner le système d'ouverture/fermeture 6 situé à l'extrémité du compartiment vers des moyens de convoyage à plat 25 des systèmes d'ouverture/fermeture 6. Il est à noter que dans le mode de réalisation représenté, un vérin 23 unique est utilisé pour entraîner les systèmes d'ouverture/fermeture se trouvant à l'extrémité de chaque compartiment 16. Selon une première variante, les moyens d'entraînement 19 en déplacement vertical sont constitués par un vérin muni d'une portion mobile comprenant des moyens d'aspiration du type ventouse qui permettent de maintenir un système d'ouverture/fermeture 6 au contact par aspiration, et d'entraîner celui-ci jusqu'au contact des moyens de convoyage à plat 25. Avantageusement, selon cette variante, un rouleau supplémentaire anti-retour, mobile en rotation uniquement dans le sens d'entraînement des moyens de convoyage à plat 25, est disposé en regard de la bande 27, permettant de plaquer le système d'ouverture/fermeture 6 contre la bande 27 lorsque celui est positionné par les moyens d'entraînement en déplacement vertical 19 entre ce rouleau supplémentaire et la bande 27, afin de ne pas endommager les ventouses par un entraînement du système d'ouverture/fermeture 6, en permettant aux moyens d'aspiration et de convoyage à plat 25 de fonctionner alternativement, le système d'ouverture/fermeture 6 étant maintenu en position par le rouleau supplémentaire entre ces deux phases de fonctionnement. Selon une seconde variante, représentée sur les figures 8 et 9, les moyens d'entraînement en déplacement vertical 19 comportent : - un premier vérin non représenté permettant de lever le système jusqu'aux moyens de convoyage à plat 25, associé à - un second vérin permettant de déplacer dans la direction de la rangée R de système d'ouverture/fermeture 6, et - un dispositif de préhension 50 comprenant au moins une première patte 52 coopérant avec un premier bord latéral d'un système d'ouverture/fermeture 6 et une seconde patte 53 coopérant avec le second bord latéral d'un système d'ouverture/fermeture 6, les deux pattes 52, 53 pouvant se rapprocher afin de saisir un système d'ouverture/fermeture 6 à l'extrémité de la rangée R. Avantageusement, les deux pattes 52, 53 forment entre elle une surface concave 54 permettant l'appui de la pièce de base 7 et les pattes 52, 53 présentent une orientation vers cette surface concave 54, afin que lors du rapprochement des pattes 52, 53, le système d'ouverture/fermeture 6 soit légèrement courbé transversalement et maintenu en position entre les pattes 52, 53 et la surface concave 54. D'autre part, dans cette deuxième variante, la paroi 17 des compartiments 16 présente une découpe 55 à son extrémité, permettant le passage du dispositif de préhension 50. Avantageusement, le dispositif de préhension 50 est unique pour l'ensemble des compartiments 16, l'ensemble des pattes 52 destinées à coopérer avec un premier bord latéral d'un système d'ouverture/fermeture 6 étant solidaire, et respectivement S'ensemble des pattes 53 destinées à coopérer avec un second bord latéral d'un système d'ouverture/fermeture 6 étant solidaire, notamment sous forme de deux plaques 56, 57 superposées. Les moyens de convoyage à plat 25 comprennent un premier rouleau 26 et une bande 27 situés de part et d'autre du trajet des systèmes d'ouverture/fermeture 6 et permettant d'entraîner ceux-ci de l'extrémité de chacun des compartiment 16, en parallèle, jusqu'à une portion d'entraînement 28 sensiblement horizontale comprenant des rouleaux 29 entraînant les systèmes d'ouverture/fermeture 6 jusqu'à une paroi de butée 30. Les moyens de convoyage comportent de plus deux chaînes sans fin 32 parallèles munies de taquets 33 permettant d'entraîner les systèmes d'ouverture/fermeture parallèlement à la direction de la paroi de butée 30 dans une direction d'entraînement F. Les taquets 33 sur les deux chaînes 32 sont situés en regard et de façon telle que les systèmes provenant de l'extrémité de chaque compartiment 16 viennent se loger en parallèle respectivement dans des intervalles successifs entre deux couples de taquets 33 situés sur les deux chaînes 30. A cette fin, les entraînements des moyens de convoyage à plat 25 et des chaînes 30 fonctionnent de façon alternative. Les chaînes 30 entraînent les systèmes d'ouverture/fermeture 6 sur un coté de la portion d'entraînement 28, ou les chaînes sont entraînées verticalement vers le bas, à la verticale d'une bande de convoyage 34 basse entourée de deux guides de positionnement vertical 35, 36. Les guides de positionnement vertical 35, 36 comportent des fentes 37 qui permettent le passage, puis l'escamotage des taquets 33, chaque chaîne étant entraînée par la suite dans une direction opposée à la direction d'entraînement F. En conséquence, chaque système d'ouverture/fermeture 6 est déposé successivement par son bord transversal sur la bande de convoyage basse 34, qui est orientée et entraînée perpendiculairement à la direction d'entraînement F de la chaîne, selon une direction de convoyage G. Chaque système d'ouverture/fermeture 6 est donc entraîné entre les guides de positionnement vertical 35,36 par la bande de convoyage basse 34. Une seconde bande de convoyage 38 haute est disposée au dessus de la bande de convoyage basse 34, au niveau de l'extrémité des guides de positionnement située en aval selon la direction de convoyage G. Les bande de convoyage haute 38 et basse 34 forment ainsi un convoyeur à bande 39 permettant de déplacer les systèmes d'ouverture 6 situés entre les bandes, les deux bords transversaux de la pièce de base 7 d'un système d'ouverture/fermeture 6 coopérant respectivement avec les deux bandes 34 et 38. Chaque bande 34, 38 comporte deux nervures 40 permettant de loger entre elles le bord transversal d'un système d'ouverture/fermeture 6. Ainsi, chaque système d'ouverture/fermeture 6 est entraîné selon la direction de convoyage G, les bandes avançant de façon continue. Afin de contrôler la position des systèmes d'ouverture/fermeture 6 sur les bandes tout en permettant une grande rapidité de convoyage, des moyens de blocage sont disposés sur le convoyeur à bande 39, afin de pouvoir stopper ou laisser passer les systèmes d'ouverture/fermeture. Ces moyens de blocage sont constitués par des vérins 42 disposés perpendiculairement au sens de convoyage des systèmes d'ouverture/fermeture. Le poste de fixation 14 est situé à proximité de l'extrémité du convoyeur à bande 39, dans le sens de convoyage G, et latéralement par rapport à celui-ci. Un vérin poussoir 43 est disposé en regard du poste de fixation 14 et de l'autre coté du convoyeur à bande 39 par rapport au poste de fixation 14, permettant de pousser un système d'ouverture/fermeture 6 situé entre les bandes de convoyage 34, 38 sur un emplacement de maintien en position du poste de fixation 14, la partie du vérin formant poussoir pouvant passer entre les deux bandes 34, 38 du convoyeur 39, comme illustré sur la figure 5 Le poste de fixation 14 comporte : des moyens de dépose d'un système d'ouverture/fermeture sur le film à partir de moyens de convoyage, et des moyens de fixation du système d'ouverture/fermeture 6. Les moyens de dépose sont constitués par un organe 44 tournant en rotation autour d'un axe A parallèle au plan du film 10 et comportant des emplacements radiaux 45 permettant chacun de maintenir par une force de contact un système d'ouverture/fermeture 6 en position. En particulier, chaque emplacement 45 comporte une ouverture 46 reliée à des moyens d'aspiration non représentés permettant d'appliquer une force d'aspiration constituant la force de contact permettant de maintenir en position un système d'ouverture/fermeture 6 au contact de l'emplacement 45. Les moyens de fixation comportent un outil de soudure 47 situé du coté du film opposé aux moyens de dépose, l'outil de soudure 47 étant mobile en translation selon un axe B perpendiculaire au plan du film 10 pour venir souder le film 10 et un système d'ouverture/fermeture 6, en prenant appui contre un emplacement 45 de l'organe de dépose 44. Dans ce mode de réalisation, l'organe de dépose comporte quatre emplacements 45 de maintien en position de systèmes d'ouverture/fermeture 6. La machine comporte de plus un poste de pré découpage 48, permettant de réaliser des pré-découpe 4 décrites ci-dessus, disposé en amont du poste de fixation 14 de systèmes d'ouvertures/fermeture 6, dans le sens de défilement D du film 10. Avantageusement, ce poste de pré découpage 48 est situé à une distance du poste de fixation 14 correspondant sensiblement au multiple de la longueur d'un sac. Le film, après fixation d'un système d'ouverture/fermeture par le poste de fixation 14, est à nouveau enroulé sous forme de bobine 49. L'alimentation du poste de fixation 14 en systèmes d'ouverture/fermeture 6 par la machine décrite ci-dessus se déroule de la façon suivante. Un opérateur ou des moyens mécaniques appropriés chargent les systèmes d'ouverture/fermeture 6 sous forme de rangées R dans les compartiments du magasin, en écartant la cale mobile 20. Les compartiments 16 du magasin 15 permettent de former ainsi, dans ce mode de réalisation, six rangées de systèmes d'ouverture/fermeture. Les moyens d'entraînement 19 en déplacement vertical sont mobiles entre une position basse et une position haute. Ils permettent, à chacune de leur phase montée, d'alimenter les moyens de convoyage à plat 25 avec six systèmes d'ouverture/fermeture en parallèle, qui étaient disposés à l'extrémité de chacune des rangées R logées dans les compartiments 16. Les systèmes d'ouverture/fermeture 6 sont disposés à plat sur la portion d'entraînement 28 et viennent buter contre la paroi de butée 30, chaque système se logeant entre deux couples de taquets 33 appartenant aux chaînes 30, les systèmes d'ouverture/fermeture 6 étant toujours parallèles et à plat sur le support constitué par les rouleaux 29. Les chaînes 32 sont immobiles pendant cette opération, et les taquets 33 sont positionnés de façon à ce qu'il ne soit situés sur la trajectoire des systèmes d'ouverture/fermeture 6, ils sont par exemple dans le prolongement des parois 17 des compartiments 16 du magasin 15. Les chaînes sont ensuite entraînées, pour déposer successivement les systèmes, par leur bord transversal, sur le convoyeur 39. Les systèmes d'ouverture/fermeture 6 sont alors entraînés vers le poste de fixation 14. Les moyens de blocage 42 permettent de contrôler précisément la position des systèmes d'ouverture/fermeture 6 et de placer ceux-ci en face du vérin poussoir 43 pour les pousser vers l'organe de dépose 44. Cette disposition du magasin et des moyens de convoyage permet d'une part un mode de fixation pas à pas et d'autre part d'obtenir une cadence d'alimentation du poste de fixation importante car : le magasin 15 peut être rechargé en parallèle dans chaque compartiment 16, les systèmes d'ouverture/fermeture 6 étant ensuite regroupés vers un convoyeur 39 les entraînant séquentiellement. Le positionnement des systèmes d'ouverture/fermeture 6 sur le convoyeur 39 est contrôlé, ce qui permet une vitesse importante du convoyeur 39 en conservant une précision suffisante. Comme décrit ci-dessus, le défilement du film D est réalisé en mode pas à pas. Dans une première étape, le film avance d'une distance sensiblement correspondante à la longueur d'un sac. Puis le défilement est arrêté, le poste de fixation 14 permet alors la fixation d'un système d'ouverture fermeture sur le film. En parallèle, en amont, le poste de prédécoupage 48 réalise une prédécoupe 4. La disposition du poste de pré découpage à une distance multiple de la longueur d'un sac permet ce fonctionnement simple, en parallèle, des postes de pré découpage 48 et de fixation 14. La fixation ainsi réalisée présente les avantages suivants. La fixation de systèmes d'ouverture/fermeture 6 sur le film 10 préalablement à la fabrication des sacs 3 permet de simplifier celle-ci. Cette disposition est avantageuse en ce qu'elle permet de fournir un film comprenant déjà des systèmes d'ouverture fixés, ce film pouvant être utilisé sur une machine de type connu permettant de réaliser la conformation de sac d'emballages à partir d'un film, et notamment d'un film 10 conditionné sous forme d'une bobine. En effet, en utilisant de telles bobines, chaque sac 3 peut être constitué simplement en dévidant la bobine 49, en repliant dans un premier temps le film 10 parallèlement à son sens de défilement pour former les parois du sac 2, puis en réalisant des liaisons et des découpes perpendiculairement à ce sens de défilement. Comme il va se soi, l'invention ne se limite pas aux formes de réalisation préférentielles décrites ci-dessus, à titre d'exemples non limitatifs ; elle en embrasse au contraire toutes les variantes de réalisation dans le cadre des revendications ci-après. The present invention relates to a machine for fixing opening / closing systems on a film intended in particular for the manufacture of packaging bags as well as a film obtained by the use of this machine. It is known from document FR 2 833 576 to use opening / closing systems for packaging bags comprising a flat base part at least partially delimiting an opening therethrough, this base part comprising guide means capable of receiving a slide making it possible to close the opening or to leave it free, the flat base part being intended to be fixed to the wall of the bag so that the opening which it delimits coincides with a fitted opening in the wall of the bag. The fixing of such systems on bags can be carried out in various ways by gluing or heat welding. However, it appears that the attachment of such systems cannot be carried out online on an uninterrupted film with the machines currently used for fastening the closure using interlocking profiled strips, in particular of the type described in document EP 0 843 636. Indeed , this type of machine is suitable for fixing opening / closing systems which are cut from continuous strips and then fixed on a film. This type of arrangement does not allow the fixing of opening / closing systems of the type described above, each opening / closing systems constituting a separate part having to be precisely positioned at a location of the film corresponding to a bag opening. The object of the present invention is to allow fixing of the opening / closing systems of the type mentioned above, by guaranteeing this closing on a unwinding film, in particular of the reel-to-reel type, thus guaranteeing an improved fixing rate and precise positioning. opening / closing systems. To this end, the subject of the present invention is a machine for fixing opening / closing systems, in particular for packaging bags, of the type comprising a flat base part at least partially delimiting an opening through it, this part of base comprising guide means parallel to the opening which can receive a slide allowing to close it or leave the opening free, machine characterized in that it comprises: - means making it possible to scroll a film in a running direction, - at least one loading station for opening / closing systems , a station for fixing the opening / closing systems to the film, and means for conveying the opening / closing systems between the stations, comprising means making it possible to control the position of the opening / closing systems, the film running being carried out step by step, the fixing station fixing an opening / closing system when the film running is interrupted. Advantageously, the fixing station comprises means for depositing an opening / closing system on the film from conveying means, as well as means for fixing the opening / closing system. According to one embodiment, the removal means consist of a member rotating in rotation about an axis parallel to the plane of the film and comprising at least two radial locations making it possible to maintain an opening / closing system by a contact force in position. Advantageously, the locations include an opening making it possible to apply a suction force constituting a contact force making it possible to hold an opening / closing system in position. According to one embodiment, the fixing means comprise a welding tool located on the side of the film opposite to the removal means, the welding tool being movable in translation along an axis perpendicular to the plane of the film to weld the film with a system. opening / closing, by pressing against a radial location of the depositing member. Advantageously, the depositing member comprises four radial locations for holding the opening / closing systems in position. According to one embodiment, the conveyor means comprise a first belt conveyor comprising two bands of conveying allowing the opening / closing systems located between the strips to be moved, the two transverse edges of the base part of an opening / closing system cooperating respectively with the two strips. Advantageously, at least one strip comprises at least two ribs making it possible to accommodate between them the transverse edge of an opening / closing system. According to one embodiment, the machine comprises a push cylinder situated opposite the depositing member and on the other side of the first belt conveyor, making it possible to push an opening / closing system located between the conveyor belts on a radial location for holding the removal member in position, the part of the actuator forming a pusher being able to pass between the two belts of the first belt conveyor. Advantageously, the means making it possible to control the position of the opening / closing systems include blocking means arranged on the conveying means, in order to stop or allow the opening / closing systems to pass. According to one embodiment, the blocking means consist of at least one jack arranged perpendicular to the direction of conveying of the opening / closing systems, at the level of the first belt conveyor. Advantageously, the conveyor belts are arranged one above the other, the lowest band being longer upstream of the conveying direction by at least one length of an opening / closing system. . According to one embodiment, the loading station for opening / closing systems comprises a magazine comprising at least one compartment in which opening / closing systems are intended to be positioned in a row, the width of which is substantially corresponding to the width of an opening / closing system, delimited laterally by substantially vertical walls, and arranged above a support and drive belt in the direction of the length of the compartment, each compartment having means at its end vertical displacement drive for an opening / closing system located at the end of the compartment. Advantageously, a movable and removable wedge is arranged in at least one compartment, subjected to a restoring force making it possible to press the row of opening / closing system against the end comprising the means for driving in vertical displacement. According to one embodiment, the restoring force is exerted by a roller in sliding support against the wedge and in support on two ramps formed on the walls of the compartment, ramps oriented towards the end of the compartment comprising the moving drive means vertical. According to one possibility, the means for driving in vertical displacement consist of a jack provided with a thrust portion which makes it possible to drive the opening / closing system located at the end of the compartment towards flat conveying means . According to another possibility, the means for driving in vertical displacement comprise at least one jack provided with a movable portion comprising suction means making it possible to hold in position at least one opening / closing system. According to yet another possibility, the means for driving in vertical displacement comprise a gripping device comprising at least two tabs cooperating with the edges of an opening / closing device, as well as means for driving in a substantially parallel direction to the axis of the row of opening / closing systems and means for driving in vertical displacement, in particular of the jack type. According to one embodiment, the flat conveying means comprise at least one roller and / or conveyor belts making it possible to drive opening / closing systems in parallel, the base part being disposed flat against these means of conveying, to a substantially horizontal drive portion and limited by a stop wall. Advantageously, the conveyor means further comprise at least one endless chain provided with catches making it possible to drive the opening / closing systems parallel to the direction of the abutment wall, in order to bring them successively to the end of the chain travel on the portion of the lower conveyor belt not facing the upper conveyor belt, this portion being surrounded by two vertical positioning guides for an opening / closing system. According to one embodiment, a station for pre-cutting an external bag opening is disposed upstream from the station for fixing the opening / closing systems, in the direction of travel of the film. Advantageously, the film is initially stored in the form of a reel. According to one embodiment, the film, after fixing an opening / closing system, is wound in the form of a reel. The present invention also relates to a film for a packaging bag, characterized in that it is equipped with at least one opening / closing system of the type comprising a flat base part at least partially delimiting an opening through it , this basic part comprising guide means parallel to the opening that can receive a slide making it possible to close or leave free the opening, this system being disposed opposite a pre-cut forming a detachable strip and that it is packaged in the form of a reel. The present invention will be better understood on reading the following description, with reference to the accompanying drawings showing an embodiment of a fixing device according to the invention. Figure 1 shows an opening / closing system attached to a bag in perspective and in partial section. Figure 2 is a sectional view along ll-ll of Figure 1. Figure 3 is a perspective view of a film showing schematically a pre-cut and the fixing of an opening / closing system on a pre cutting. Figure 4 is a top view of an embodiment of the machine according to the invention. Figure 5 is a detail view on an enlarged scale in section along IV-IV of Figure 4. Figure 6 is a front view of the machine of Figure 4. Figure 7 is a side view of the machine of Figure 4 8 is a detailed view from the rear of the end of the magazine and of the means for driving in vertical displacement, according to an alternative embodiment. Figure 9 is a top view of the detail of Figure 8. Figures 1 and 2 show a bag 2 has two walls 3 fixed to one another, one of these walls 3 having a precut 4 defining a strip 5, and comprises an opening / closing system 6 fixed on its internal face below this strip 5, as shown in FIG. 2. The strip 5 has rounded ends, which are cut and which can thus be raised and seized to allow the removal of this strip 5 by manual traction. As shown more particularly in FIG. 2, the opening / closing system 6 comprises a flat base part 7 at least partially delimiting an opening 8 through it, this base part 7 comprising guide means, not shown, in parallel at the opening which can receive a slide 9 making it possible to close or leave free the opening 8. The base part is fixed to the wall 3 outside the area delimited by the precut 4, in order to remain united of the bag after removal of the strip 5. A user can therefore, during the first use, remove the strip 5 by manual traction, then open and close the bag by moving the slider 9 transversely to the base part 7. The machine for fixing opening systems 6 according to the invention makes it possible to fix these systems 6 to a film 9 intended to form the wall 3 of packaging bags 2, according to the principle illustrated in f igure 3. The film advances in a direction of travel D, firstly a precut 4 is made on the film 10, then an opening / closing system 6 is fixed at this precut 4, the slider 9 being located between the film 10 and the base part 7 fixed to the film 10. The machine for fixing the opening / closing systems 6, represented in FIGS. 4 to 7 comprises: - means not shown making it possible to scroll a film 10 according to a direction of travel D, from a reel 12, - a station 13 for loading opening / closing systems 6, - a station 14 for fixing the opening / closing systems 6 on the film, and - means for conveying the opening / closing systems between stations. The film 10 is scrolled step by step, the fixing station 14 securing an opening / closing system 6 when the film 10 is interrupted. The loading station 13 for the opening / closing systems 6 visible in FIGS. 4 and 7 comprises a magazine 15 comprising a plurality of compartments 16, the width of which corresponds substantially to the width of an opening / closing system 6, laterally delimited by substantially vertical walls 17, and disposed above a support and drive belt 18 in the direction E of the length of the compartment, each compartment 16 having at one end drive means 19 in vertical displacement for an opening / closing system 6 located at this end. The opening / closing systems 6 are intended to be positioned parallel, in row R, vertically in the direction of their greatest length, the face of the flat base of an opening / closing system not comprising a directed slide. towards the end of the compartment comprising the drive means 19 in vertical displacement. A mobile and removable wedge 20 is disposed in each compartment 16, at the end of the row, making it possible to press the row against the end comprising the drive means 19 in vertical displacement. This wedge 20 is subjected to a stress by a sliding support against a roller 22 which is supported on two ramps formed on the walls 17 of the compartment 16, these ramps being inclined towards the end of the compartment 16 comprising the drive means 19 in vertical displacement. The drive means 19 are constituted by a jack 23 provided with a thrust portion 24 which makes it possible to drive the opening / closing system 6 situated at the end of the compartment towards flat conveying means 25 of the systems opening / closing 6. It should be noted that in the embodiment shown, a single jack 23 is used to drive the opening / closing systems located at the end of each compartment 16. According to a first variant, the drive means 19 for vertical displacement are constituted by a jack provided with a movable portion comprising suction means of the suction cup type which make it possible to maintain an opening / closing system 6 in contact by suction, and to drive this until contact with the flat conveying means 25. Advantageously, according to this variant, an additional non-return roller, movable in rotation only in the driving direction of the flat conveying means 25, is arranged opposite the strip 27, making it possible to press the opening / closing system 6 against the strip 27 when that is positioned by the vertical displacement drive means 19 between this additional roller and the strip 27, so as not to damage the suction cups by driving the opening / closing system 6, allowing the suction and flat conveying means 25 to operate alternately, the opening / closing system 6 being held in position by the additional roller between these two operating phases. According to a second variant, shown in FIGS. 8 and 9, the means for driving in vertical displacement 19 comprise: - a first jack, not shown, making it possible to lift the system up to the flat conveying means 25, associated with - a second jack making it possible to move in the direction of the row R of the opening / closing system 6, and - a gripping device 50 comprising at least one first tab 52 cooperating with a first lateral edge of an opening / closing system 6 and a second tab 53 cooperating with the second lateral edge of an opening / closing system 6, the two legs 52, 53 being able to come together in order to grip an opening / closing system 6 at the end of the row R Advantageously, the two legs 52, 53 form between them a concave surface 54 allowing the support of the base part 7 and the legs 52, 53 have an orientation towards this concave surface 54, so that when the s legs 52, 53, the opening / closing system 6 is slightly curved transversely and held in position between the legs 52, 53 and the concave surface 54. On the other hand, in this second variant, the wall 17 of the compartments 16 has a cutout 55 at its end, allowing the passage of the gripping device 50. Advantageously, the gripping device 50 is unique for all of the compartments 16, all of the tabs 52 intended to cooperate with a first lateral edge of an opening / closing system 6 being integral, and respectively the assembly of the legs 53 intended for cooperate with a second lateral edge of an opening / closing system 6 being integral, in particular in the form of two superimposed plates 56, 57. The flat conveying means 25 comprise a first roller 26 and a band 27 located on either side of the path of the opening / closing systems 6 and making it possible to drive these from the end of each of the compartments 16 , in parallel, to a substantially horizontal drive portion 28 comprising rollers 29 driving the opening / closing systems 6 to a stop wall 30. The conveying means further comprise two endless chains 32 parallel provided with lugs 33 making it possible to drive the opening / closing systems parallel to the direction of the abutment wall 30 in a driving direction F. The lugs 33 on the two chains 32 are located opposite and in such a way that the systems coming from the end of each compartment 16 are housed in parallel respectively in successive intervals between two pairs of cleats 33 located on the two chains 30. To this end, the drives of the flat conveying means 25 and the chains 30 operate alternately. The chains 30 drive the opening / closing systems 6 on one side of the drive portion 28, or the chains are driven vertically downwards, vertically with a low conveyor belt 34 surrounded by two positioning guides vertical 35, 36. The vertical positioning guides 35, 36 have slots 37 which allow the passage and then the retraction of the lugs 33, each chain being subsequently driven in a direction opposite to the drive direction F. Consequently, each opening / closing system 6 is successively deposited by its transverse edge on the low conveyor belt 34, which is oriented and driven perpendicular to the drive direction F of the chain, in a conveyor direction G. Each opening / closing system 6 is therefore driven between the vertical positioning guides 35, 36 by the low conveyor belt 34. A second high conveyor belt 38 is d is placed above the lower conveyor belt 34, at the end of the positioning guides located downstream in the conveying direction G. The upper 38 and lower 34 conveyor belts thus form a belt conveyor 39 making it possible to move the opening systems 6 located between the belts, the two transverse edges of the part base 7 of an opening / closing system 6 cooperating respectively with the two strips 34 and 38. Each strip 34, 38 has two ribs 40 making it possible to accommodate between them the transverse edge of an opening / closing system 6 Thus, each opening / closing system 6 is driven in the conveying direction G, the belts advancing continuously. In order to control the position of the opening / closing systems 6 on the belts while allowing a great speed of conveying, blocking means are arranged on the belt conveyor 39, in order to be able to stop or let pass the opening systems /closing. These locking means are constituted by jacks 42 arranged perpendicular to the direction of conveying of the opening / closing systems. The fixing station 14 is located near the end of the belt conveyor 39, in the conveying direction G, and laterally with respect thereto. A push cylinder 43 is disposed opposite the fixing station 14 and on the other side of the belt conveyor 39 relative to the fixing station 14, making it possible to push an opening / closing system 6 located between the conveyor belts 34 , 38 in a position where the fixing station 14 is kept in position, the part of the actuator forming a pusher being able to pass between the two bands 34, 38 of the conveyor 39, as illustrated in FIG. 5 The fixing station 14 comprises: means for depositing an opening / closing system on the film from conveying means, and means for fixing the opening / closing system 6. The depositing means are constituted by a member 44 rotating in rotation around an axis A parallel to the plane of the film 10 and comprising radial locations 45 each making it possible to maintain, by a contact force, an opening / closing system 6 in position. In particular, each location 45 has an opening 46 connected to suction means (not shown) making it possible to apply a suction force constituting the contact force making it possible to hold an opening / closing system 6 in contact with the 'location 45. The fixing means comprise a welding tool 47 located on the side of the film opposite to the removal means, the welding tool 47 being movable in translation along an axis B perpendicular to the plane of the film 10 to weld the film 10 and an opening / closing system 6, bearing against a location 45 of the depositing member 44. In this embodiment, the depositing member has four locations 45 for holding the opening systems in position / closure 6. The machine further comprises a pre-cutting station 48, making it possible to make the pre-cutting 4 described above, arranged upstream of the fixing station 14 of opening / closing systems 6, in the direction of travel D of the film 10. Advantageously, this pre-cutting station 48 is located at a distance from the fixing station 14 corresponding substantially to the multiple of the length of a bag. The film, after fixing an opening / closing system by the fixing station 14, is again wound up in the form of a reel 49. The supply of the fixing station 14 with opening / closing systems 6 by the machine described above proceeds as follows. An operator or appropriate mechanical means load the opening / closing systems 6 in the form of rows R in the compartments of the magazine, by moving the movable wedge 20 apart. The compartments 16 of the magazine 15 make it possible to form thus, in this embodiment , six rows of opening / closing systems. The drive means 19 in vertical displacement are movable between a low position and a high position. They allow, at each of their mounted phases, to supply the flat conveying means 25 with six opening / closing systems in parallel, which were arranged at the end of each of the rows R housed in the compartments 16. The opening / closing systems 6 are arranged flat on the drive portion 28 and abut against the abutment wall 30, each system housed between two pairs of lugs 33 belonging to the chains 30, the opening / closing systems 6 being always parallel and flat on the support constituted by the rollers 29. The chains 32 are stationary during this operation, and the lugs 33 are positioned so that it is not located on the path of the opening / closing systems 6, they are for example in the extension of the walls 17 of the compartments 16 of the magazine 15. The chains are then driven, to deposit successively the systems, by their transverse edge, on the conveyor 39. The opening / closing systems 6 are then driven towards the fixing station 14. The locking means 42 make it possible to precisely control the position of the opening / closing systems 6 and to place these opposite the push cylinder 43 to push them towards the depositing member 44. This arrangement of the magazine and of the conveying means allows on the one hand a mo fixing step by step and on the other hand to obtain a high rate of supply of the fixing station because: the magazine 15 can be reloaded in parallel in each compartment 16, the opening / closing systems 6 then being grouped together towards a conveyor 39 driving them sequentially. The positioning of the opening / closing systems 6 on the conveyor 39 is controlled, which allows a high speed of the conveyor 39 while maintaining sufficient precision. As described above, the film D is scrolled in step-by-step mode. In a first step, the film advances by a distance substantially corresponding to the length of a bag. Then the scrolling is stopped, the fixing station 14 then allows the fixing of a closing opening system on the film. In parallel, upstream, the precut station 48 performs a precut 4. The arrangement of the precut station at a distance multiple of the length of a bag allows this simple operation, in parallel, of the precut stations 48 and fixing 14. The fixing thus produced has the following advantages. The fixing of opening / closing systems 6 on the film 10 prior to the manufacture of the bags 3 makes it possible to simplify the latter. This arrangement is advantageous in that it makes it possible to provide a film already comprising fixed aperture systems, this film being able to be used on a machine of known type enabling the packaging bag to be formed from a film. , and in particular a film 10 packaged in the form of a reel. Indeed, by using such reels, each bag 3 can be formed simply by unwinding the reel 49, by first folding the film 10 parallel to its direction of travel to form the walls of the bag 2, then by making connections and cuts perpendicular to this direction of travel. As is obvious, the invention is not limited to the preferred embodiments described above, by way of nonlimiting examples; on the contrary, it embraces all of the variant embodiments thereof within the scope of the claims below.

Claims

REVENDICATIONS 1. Machine de fixation de systèmes d'ouverture/fermeture (6), notamment pour sacs (2) d'emballage, du type comportant une pièce de base (7) plane délimitant au moins partiellement une ouverture (8) à travers elle, cette pièce de base (7) comportant des moyens de guidage parallèlement à l'ouverture (8) pouvant recevoir un coulisseau (9) permettant de d'obturer ou de laisser libre l'ouverture (8), machine caractérisée en ce qu'elle comporte : - des moyens permettant de faire défiler un film (10) selon une direction de défilement (D), - au moins un poste de chargement (13) de systèmes d'ouverture/fermeture (6), - un poste de fixation (14) des systèmes d'ouverture/fermeture (6) sur le film (10), et - des moyens de convoyage (25, 28, 32, 38) des systèmes d'ouverture/fermeture (6) entre les postes (13, 14), comprenant de moyens (42) permettant de contrôler la position des systèmes d'ouverture/fermeture (6), le défilement (D) du film étant réalisé pas à pas, le poste de fixation (14) réalisant la fixation d'un système d'ouverture/fermeture (6) lorsque le défilement du film (D) est interrompu. 2. Machine selon la revendication 1 , caractérisée en ce que le poste de fixation (14) comporte des moyens de dépose (44) d'un système d'ouverture/fermeture (6) sur le film (10) à partir de moyens de convoyage, ainsi que des moyens de fixation (47) du système d'ouverture/fermeture (6). 3. Machine selon la revendication 2, caractérisée en ce que les moyens de dépose sont constitués par un organe (44) tournant en rotation autour d'un axe (A) parallèle au plan du film (10) et comportant au moins deux emplacements radiaux (45) permettant de maintenir par une force de contact un système d'ouverture/fermeture (6) en position. 4. Machine selon la revendication 3, caractérisée en ce que les emplacements (45) comportent une ouverture (46) permettant d'appliquer une force d'aspiration constituant une force de contact permettant de maintenir en position un système d'ouverture/fermeture (6). 5. Machine selon l'une des revendications 2 à 4 caractérisée en ce que les moyens de fixation comportent un outil de soudure (47) situé du coté du film (10) opposé aux moyens de dépose (44), ]'outil de soudure (47) étant mobile en translation selon un axe (B) perpendiculaire au plan du film (10) pour souder le film (10) avec un système d'ouverture/fermeture (6), en prenant appui contre un emplacement radial (45) de l'organe de dépose (44). 6. Machine selon l'une des revendications 3 à 5, caractérisée en ce que l'organe de dépose (44) comporte quatre emplacements radiaux (45) de maintien en position de systèmes d'ouverture/fermeture (6). 7. Machine selon l'une des revendications 1 à 6, caractérisée en ce que les moyens de convoyage comportent un premier convoyeur à bande (38) comprenant deux bandes de convoyage (34, 38) permettant de déplacer les systèmes d'ouverture/fermeture (6) situés entre les bandes (34, 38), les deux bords transversaux de la pièce de base (7) d'un système d'ouverture/fermeture (6) coopérant respectivement avec les des deux bandes (34, 38). 8. Machine selon la revendication 7, caractérisée en ce qu'au moins une bande (34, 38) comporte au moins deux nervures (40) permettant de loger entre elles le bord transversal d'un système d'ouverture/fermeture (6). 9. Machine selon l'une des revendications 2 à 8, caractérisée en ce qu'elle comporte un vérin poussoir (43) situé en regard de l'organe de dépose (44) et de l'autre coté du premier convoyeur à bande (38), permettant de pousser un système d'ouverture/fermeture (6) situé entre les bandes de convoyage (34, 38) sur un emplacement radial (45) de maintien en position de l'organe de dépose (44), la partie du vérin (43) formant poussoir pouvant passer entre les deux bandes (34, 38) du premier convoyeur à bande (39). 10. Machine selon l'une des revendications 7 à 9, caractérisée en ce que les moyens permettant de contrôler la position des systèmes d'ouverture/fermeture (6) comportent des moyens de blocage (42) disposés sur les moyens de convoyage (39), afin de stopper ou de laisser passer les systèmes d'ouverture/fermeture (6). 11. Machine selon la des revendications 10, caractérisée en ce que les moyens de blocage sont constitués par au moins un vérin (42) disposé perpendiculairement au sens de convoyage des systèmes d'ouverture/fermeture (6), au niveau du premier convoyeur à bande (38). 12. Machine selon l'une des revendications 1 à 11 , caractérisée en ce que les bandes de convoyages (34, 38) sont disposées l'une au dessus de l'autre, la bande la plus basse (34) étant plus longue vers l'amont de la direction de convoyage (G) d'au moins une longueur d'un système d'ouverture/fermeture (6). 13. Machine selon l'une des revendications 1 à 12, caractérisée en ce que poste de chargement (13) des systèmes d'ouverture/fermeture (6) comporte un magasin (15) comprenant au moins un compartiment (16) dans lequel des systèmes d'ouverture/fermeture (6) sont destinés à être positionnés en rangée (R), dont la largeur est sensiblement correspondante à la largeur d'un système d'ouverture/fermeture (6), délimité latéralement par des parois (17) sensiblement verticales, et disposé au dessus d'un tapis (18) de support et d'entraînement selon la direction de la longueur du compartiment, chaque compartiment présentant à son extrémité des moyens d'entraînement (19) en déplacement vertical pour un système d'ouverture/fermeture (6) situé à l'extrémité du compartiment (16). 14. Machine selon la revendication 13, caractérisée en ce qu'une cale (20) mobile et amovible est disposée dans au moins un compartiment 16, soumise à une force de rappel permettant de presser la rangée (R) de système d'ouverture/fermeture (6) contre l'extrémité comportant les moyens d'entraînement (19) en déplacement vertical.. 15. Machine selon la revendication 14, caractérisée en ce la force de rappel est exercée par un rouleau en appui glissant contre la cale et en appui sur deux rampes ménagées sur les parois du compartiment, rampes orientées vers l'extrémité du compartiment comportant les moyens d'entraînement (19) en déplacement vertical. 16. Machine selon l'une des revendications 13 à 15, caractérisée en ce que les moyens d'entraînement (19) en déplacement vertical sont constitués par un vérin (23) muni d'une portion de poussée (24) qui permet d'entraîner le système d'ouverture/fermeture (6) situé à l'extrémité du compartiment (16) vers des moyens de convoyage (25) à plat. 17. Machine selon l'une des revendications 13 à 15, caractérisée en ce que les moyens d'entraînement (19) en déplacement vertical comportent au moins un vérin muni d'une portion mobile comprenant des moyens d'aspiration permettant de maintenir en position au moins un système d'ouverture/fermeture (6). 18. Machine selon l'une des revendications 13 à 15, caractérisée en ce que les moyens d'entraînement (19) en déplacement vertical comprennent un dispositif de préhension (50) comportant au moins deux pattes (52, 53) coopérant avec les bords d'un dispositif d'ouverture/fermeture (6), ainsi que des moyens d'entraînement dans une direction sensiblement parallèle à l'axe de la rangée de systèmes d'ouverture/fermeture (6) et des moyens d'entraînement en déplacement vertical, notamment du type vérin. 19. Machine selon l'une des revendications 1 à 18, caractérisée en ce que les moyens de convoyage (25) à plat, comprennent au moins un rouleau et/ou des bandes de convoyage permettant d'entraîner des systèmes d'ouverture/fermeture (6) en parallèle, la pièce de base étant disposée à plat contre ces moyens de convoyage (25), jusqu'à une portion d'entraînement (28) sensiblement horizontale et limitée par une paroi de butée (30). 20. Machine selon la revendication 19, caractérisée en ce que les moyens de convoyage comportent de plus au moins une chaîne sans fin (32) munie de taquets (33) permettant d'entraîner les systèmes d'ouverture/fermeture (6) parallèlement à la direction de la paroi de butée (30), afin de les amener successivement, à l'extrémité de la course de la chaîne (32) sur la portion de la bande de convoyage basse (34) n'étant pas en regard de la bande de convoyage haute (38), cette portion étant entourée de deux guides (35, 36) de positionnement vertical pour un système d'ouverture/fermeture (6). 21. Machine selon l'une des revendications 1 à 20, caractérisée en ce qu'un poste (48) de pré découpage d'une ouverture extérieure de sac (2) est disposé en amont du poste de fixation (14) de systèmes d'ouvertures/fermeture (6), dans le sens de défilement (D) du film (10). 22. Machine selon l'une des revendications 1 à 21 , caractérisée en ce que le film (10) est initialement stocké sous forme d'une bobine (12). 23. Machine selon l'une des revendications 1 à 22, caractérisée en ce que le film, après fixation d'un système d'ouverture/fermeture est enroulé sous forme de bobine (49). 24. Film (10) pour sac d'emballage (3), caractérisée en ce qu'il est équipé d'au moins un système d'ouverture/fermeture (10) du type comportant une pièce de base (7) plane délimitant au moins partiellement une ouverture (8) à travers elle, cette pièce de base (7) comportant des moyens de guidage parallèlement à l'ouverture (8) pouvant recevoir un coulisseau (9) permettant de d'obturer ou de laisser libre l'ouverture (8), ce système étant disposé en regard d'une pré découpe (4) formant une bande détachable et qu'il est conditionné sous forme d'une bobine (49). CLAIMS 1. Machine for fixing opening / closing systems (6), in particular for packaging bags (2), of the type comprising a flat base part (7) at least partially delimiting an opening (8) through it , this basic part (7) comprising guide means parallel to the opening (8) able to receive a slide (9) making it possible to close or leave free the opening (8), machine characterized in that it comprises: - means making it possible to scroll a film (10) in a running direction (D), - at least one loading station (13) of opening / closing systems (6), - a fixing station (14) opening / closing systems (6) on the film (10), and - conveying means (25, 28, 32, 38) of opening / closing systems (6) between the stations (13 , 14), comprising means (42) making it possible to control the position of the opening / closing systems (6), the film (D) running step by step , the fixing station (14) carrying out the fixing of an opening / closing system (6) when the running of the film (D) is interrupted. 2. Machine according to claim 1, characterized in that the fixing station (14) comprises means for depositing (44) an opening / closing system (6) on the film (10) from means of conveying, as well as fixing means (47) of the opening / closing system (6). 3. Machine according to claim 2, characterized in that the removal means are constituted by a member (44) rotating in rotation about an axis (A) parallel to the plane of the film (10) and comprising at least two radial locations (45) allowing to maintain by a contact force an opening / closing system (6) in position. 4. Machine according to claim 3, characterized in that the locations (45) have an opening (46) for applying a suction force constituting a contact force for maintaining in position an opening / closing system ( 6). 5. Machine according to one of claims 2 to 4 characterized in that the fixing means comprise a welding tool (47) located on the side of the film (10) opposite the removal means (44),] 'welding tool (47) being movable in translation along an axis (B) perpendicular to the plane of the film (10) for welding the film (10) with an opening / closing system (6), bearing against a radial location (45) of the member removal (44). 6. Machine according to one of claims 3 to 5, characterized in that the depositing member (44) has four radial locations (45) for maintaining the position of opening / closing systems (6). 7. Machine according to one of claims 1 to 6, characterized in that the conveying means comprise a first conveyor belt (38) comprising two conveyor belts (34, 38) for moving the opening / closing systems (6) located between the bands (34, 38), the two transverse edges of the base part (7) of an opening / closing system (6) cooperating respectively with the two bands (34, 38). 8. Machine according to claim 7, characterized in that at least one strip (34, 38) comprises at least two ribs (40) making it possible to accommodate between them the transverse edge of an opening / closing system (6) . 9. Machine according to one of claims 2 to 8, characterized in that it comprises a push cylinder (43) located opposite the depositing member (44) and on the other side of the first conveyor belt ( 38), making it possible to push an opening / closing system (6) located between the conveyor belts (34, 38) on a radial location (45) for holding the depositing member (44) in position, the part of the jack (43) forming a pusher which can pass between the two belts (34, 38) of the first belt conveyor (39). 10. Machine according to one of claims 7 to 9, characterized in that the means making it possible to control the position of the opening / closing systems (6) comprise blocking means (42) arranged on the conveying means (39 ), in order to stop or allow the opening / closing systems (6) to pass. 11. Machine according to claim 10, characterized in that the locking means consist of at least one jack (42) arranged perpendicular to the direction of conveying of the opening / closing systems (6), at the level of the first conveyor to band (38). 12. Machine according to one of claims 1 to 11, characterized in that the conveyor belts (34, 38) are arranged one above the other, the lowest band (34) being longer towards upstream of the conveying direction (G) of at least one length of an opening / closing system (6). 13. Machine according to one of claims 1 to 12, characterized in that the loading station (13) of the opening / closing systems (6) comprises a magazine (15) comprising at least one compartment (16) in which opening / closing systems (6) are intended to be positioned in a row (R), the width of which is substantially corresponding to the width of an opening / closing system (6), delimited laterally by walls (17) substantially vertical, and arranged above a support and drive belt (18) in the direction of the length of the compartment, each compartment having at its end drive means (19) in vertical displacement for a system of opening / closing (6) located at the end of the compartment (16). 14. Machine according to claim 13, characterized in that a mobile and removable block (20) is arranged in at least one compartment 16, subjected to a restoring force making it possible to press the row (R) of the opening system / closure (6) against the end comprising the drive means (19) for vertical movement. 15. Machine according to claim 14, characterized in that the restoring force is exerted by a roller in sliding contact against the wedge and in support on two ramps formed on the walls of the compartment, ramps oriented towards the end of the compartment comprising the drive means (19) in vertical movement. 16. Machine according to one of claims 13 to 15, characterized in that the drive means (19) in vertical displacement consist of a cylinder (23) provided with a thrust portion (24) which allows drive the opening / closing system (6) located at the end of the compartment (16) to conveying means (25) flat. 17. Machine according to one of claims 13 to 15, characterized in that the drive means (19) in vertical displacement comprise at least one jack provided with a movable portion comprising suction means making it possible to maintain in position at least one opening / closing system (6). 18. Machine according to one of claims 13 to 15, characterized in that the drive means (19) in vertical displacement comprise a gripping device (50) comprising at least two tabs (52, 53) cooperating with the edges of an opening / closing device (6), as well as drive means in a direction substantially parallel to the axis of the row of opening / closing systems ( 6) and means for driving in vertical displacement, in particular of the jack type. 19. Machine according to one of claims 1 to 18, characterized in that the conveying means (25) flat, comprise at least one roller and / or conveyor belts for driving opening / closing systems (6) in parallel, the base part being arranged flat against these conveying means (25), up to a substantially horizontal drive portion (28) and limited by a stop wall (30). 20. Machine according to claim 19, characterized in that the conveying means further comprise at least one endless chain (32) provided with catches (33) making it possible to drive the opening / closing systems (6) parallel to the direction of the abutment wall (30), in order to bring them successively, at the end of the travel of the chain (32) on the portion of the low conveyor belt (34) not facing the high conveyor belt (38), this portion being surrounded by two guides (35, 36) for vertical positioning for an opening / closing system (6). 21. Machine according to one of claims 1 to 20, characterized in that a station (48) for pre-cutting an outer bag opening (2) is disposed upstream of the fixing station (14) of openings / closings (6), in the direction of travel (D) of the film (10). 22. Machine according to one of claims 1 to 21, characterized in that the film (10) is initially stored in the form of a reel (12). 23. Machine according to one of claims 1 to 22, characterized in that the film, after fixing an opening / closing system is wound in the form of a reel (49). 24. Film (10) for packaging bag (3), characterized in that it is equipped with at least one opening / closing system (10) of the type comprising a flat base part (7) delimiting the at least partially an opening (8) through it, this base part (7) comprising guide means parallel to the opening (8) able to receive a slide (9) making it possible to close or leave the opening free (8), this system being arranged opposite a pre-cut (4) forming a detachable strip and that it is packaged in the form of a coil (49).
PCT/FR2005/000633 2004-03-22 2005-03-16 Machine for fixing an opening/closing system to a film used to produce packaging bags WO2005102679A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05739458A EP1727668A1 (en) 2004-03-22 2005-03-16 Machine for fixing an opening/closing system to a film used to produce packaging bags

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402919 2004-03-22
FR0402919A FR2867750B1 (en) 2004-03-22 2004-03-22 MACHINE AND COIL FOR TEAR AND TIP

Publications (1)

Publication Number Publication Date
WO2005102679A1 true WO2005102679A1 (en) 2005-11-03

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PCT/FR2005/000633 WO2005102679A1 (en) 2004-03-22 2005-03-16 Machine for fixing an opening/closing system to a film used to produce packaging bags

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EP (1) EP1727668A1 (en)
FR (1) FR2867750B1 (en)
WO (1) WO2005102679A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2147809B1 (en) 2008-07-24 2014-05-21 Iveco France S.A. Road vehicle suspension and corresponding road vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5024537A (en) * 1990-01-08 1991-06-18 Zip-Pak Incorporated Tape carried pre-cut zipper
WO1997006062A1 (en) * 1995-08-09 1997-02-20 James Worth Yeager Zippered film and bag
US5951453A (en) * 1996-11-15 1999-09-14 Innoflex Incorporated Recloseable bag assembly and method of making same
US6003582A (en) * 1997-07-17 1999-12-21 Hudson-Sharp Machine Co. Apparatus for applying reclosable fasteners to a web of film
US6117060A (en) * 1998-07-17 2000-09-12 Lakeland Micro, Inc. Continuous supply of preformed reclosable fasteners
FR2833576A1 (en) * 2001-12-19 2003-06-20 Morance Soudure Opening and closing system for plastic bag containing bulk product has slider with end lugs and lengthwise projections running in guides

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5024537A (en) * 1990-01-08 1991-06-18 Zip-Pak Incorporated Tape carried pre-cut zipper
WO1997006062A1 (en) * 1995-08-09 1997-02-20 James Worth Yeager Zippered film and bag
US5951453A (en) * 1996-11-15 1999-09-14 Innoflex Incorporated Recloseable bag assembly and method of making same
US6003582A (en) * 1997-07-17 1999-12-21 Hudson-Sharp Machine Co. Apparatus for applying reclosable fasteners to a web of film
US6117060A (en) * 1998-07-17 2000-09-12 Lakeland Micro, Inc. Continuous supply of preformed reclosable fasteners
FR2833576A1 (en) * 2001-12-19 2003-06-20 Morance Soudure Opening and closing system for plastic bag containing bulk product has slider with end lugs and lengthwise projections running in guides

Also Published As

Publication number Publication date
FR2867750B1 (en) 2006-06-02
EP1727668A1 (en) 2006-12-06
FR2867750A1 (en) 2005-09-23

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