EP0102301A2 - Machine and working cycle for making plastic bags with a zip fastener and device for positioning them - Google Patents

Machine and working cycle for making plastic bags with a zip fastener and device for positioning them Download PDF

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Publication number
EP0102301A2
EP0102301A2 EP83401730A EP83401730A EP0102301A2 EP 0102301 A2 EP0102301 A2 EP 0102301A2 EP 83401730 A EP83401730 A EP 83401730A EP 83401730 A EP83401730 A EP 83401730A EP 0102301 A2 EP0102301 A2 EP 0102301A2
Authority
EP
European Patent Office
Prior art keywords
sheets
rollers
cursor
chassis
coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83401730A
Other languages
German (de)
French (fr)
Other versions
EP0102301B1 (en
EP0102301A3 (en
Inventor
Gilbert Paul Jean-Marie Hugues
Norbert Albert Heyka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexico France SARL
Original Assignee
Flexico France SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flexico France SARL filed Critical Flexico France SARL
Publication of EP0102301A2 publication Critical patent/EP0102301A2/en
Publication of EP0102301A3 publication Critical patent/EP0102301A3/en
Application granted granted Critical
Publication of EP0102301B1 publication Critical patent/EP0102301B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/42—Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916—Pliable container
    • Y10S493/927—Reclosable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53291—Slide fastener
    • Y10T29/533—Means to assemble slider onto stringer

Definitions

  • the present invention relates generally to a machine for the manufacture of plastic bags consisting of two superimposed sheets welded along their lateral edges, the bottom remaining open or being closed by a welding or folding line, these bags being equipped with profiled coupling elements extending along the edges of their opening and capable of being coupled by elastic deformation by pressure under the effect of the sliding of a slider, this machine comprising, inter alia, in known manner , downstream of an extruder producing the sheets, on the one hand an apparatus for automatically placing sliders, in operational position, on profiled coupling elements which extend along the longitudinal edges of two sheets superimposed in movement, and on the other hand, a welding and cutting blade suitable for carrying out at the desired rate, and this during periodic stops in the running of the sheets, transverse welding lines constituting the side edges of the bags.
  • Said profiled coupling elements can be extruded at the same time as the sheet and constitute an integral part thereof, or be produced separately and be attached continuously to the respective longitudinal edges of the sheets, by welding or by bonding.
  • a suitable device such as for example that which is the subject of French patent application filed in the name of the Applicant October 14, 1980 under No. 80 21974, automatically performs the laying of said sliders to come, in the operational position , cover said coupling coupling elements on each bag width.
  • This automatic positioning of the sliders is carried out - of course also at the desired rate - upstream of the welding station and cross section of the sheets.
  • One of the aims of the present invention is to avoid the disadvantage of having to move the slider installation device, which is relatively heavy and bulky, more or less frequently, and to ensure that '' it can be fixed, while also automatically and safely avoiding the risk of any operational incident.
  • a machine of the general type indicated at the beginning is, in accordance with the present invention, characterized in that it further comprises, between said apparatus for placing cursors and said welding and cutting blade, a positioning apparatus automatic said sliders on said coupling coupling elements, adapted to bring them at a determined distance from the location provided for said transverse welding lines, regardless of the width provided for said bags.
  • the slider fitting device can be fixed, which can be more particularly advantageous when it is planned that this device works on moving sheets of which at least part of the path is vertical, an arrangement which makes it more simple and more reliable means of supplying the device with sliders, since these then move by simple gravity in a vertical chute.
  • an additional characteristic of a machine according to the invention may consist in that said slider fitting device is fixed and operates on a vertical part of the path of the sheets in movement.
  • the present invention also relates, and more particularly, to the structure and the operating mode of said automatic cursor positioning device.
  • said device will be characterized in that it essentially comprises a chassis, a passage provided for allowing the scrolling of said profiled coupling elements which extend along the edges longitudinal of two superimposed sheets, and, on either side of this passage, two facing rollers, mounted at the free ends of two pivoting arms and capable, among other movements, of moving away from one of the other, to allow free passage to a slider mounted on said profiled elements, or to approach one another, and momentarily prevent this passage, which, the scrolling of the sheets continuing " causes a longitudinal displacement, d 'determined amplitude, of said cursor on said elements.
  • Such a cursor positioning device in accordance with the present invention has other interesting characteristics, which will be more explicitly discussed below, and in particular means allowing the delivery of finished bags, open or closed, as well as carrying out a testing the proper functioning of each cursor.
  • the chassis of the device has been referenced in 1 and the two rollers, forming between them a passage for the coupling profiles, in 2.
  • These rollers which are rotatable around axes 2a, and have a groove 2b, are each mounted at the free end of an arm 3 mounted to pivot about an axis 4.
  • the other end of the arms 3 is connected by a link 5 to a common axis 6 secured to a mobile support 7.
  • the axes articulated connecting the arms 3 to the links 5 have been referenced at 8.
  • the position, in abutment, of the movable support 7 relative to the chassis 1, can be adjusted by the rotation of a knurled button 9 mounted at the end of a screw 10 screwed into the support and whose free end comes abut, at 11, on one end of the chassis 1.
  • a lock nut 12 allows, after adjustment, and by tightening on the wall 13 of the support 7, to fix the position of the screw 10 relative to the support 7.
  • the maximum degree of pinching of the two rollers 2 can be adjusted one on the other.
  • the displacement of the mobile support 7, which will control the pivoting of the links 5 and levers 3, and consequently the opening and closing of the rollers 2, is produced by a pneumatic cylinder 14 fixed relative to the chassis 1 and whose threaded end 15 of the piston rod, on which is also mounted an adjusting lock nut 16, is screwed into said support.
  • Automatic feeding control of the cylinder of the jack 14 is effected by means of a solenoid valve and all appropriate detector means (not shown), this as a function of the progress and periodic stops of the superimposed sheets of plastic material in movement (in the direction arrow F), which have been referenced in 17 and bear on their longitudinal free edges of the coupling profile elements 18 (in FIG. 2, a slider mounted in the operational position on the profiles 18 has been referenced in 19).
  • the hinge pins 4 are integral with a carriage 20 mounted to slide on the chassis 1.
  • the sliding of the carriage 20 relative to the chassis 1 is ensured on each side by lateral slides 21, with retention ensured by the intermediate two lateral grooves 22 of the chassis, on each of which slides the head 23 of a screw 24 fixed in said carriage 20.
  • the carriage 20 can be resiliently locked on the frame 1 by the rounded end 25, urged outward by an internal spring, with an elastic lock screw 26 to nut 27 fixed on the carriage 20, this end being able to occupy one of two notches 28 or 29 of the chassis 1.
  • the operation of the device which has just been described is as follows: a cursor 19 having arrived in the position shown in FIG. 3, the jack 14 was controlled, during the preceding cycle time, so that its rod is retracted as far as possible into its body, which has brought the movable support 7 into the front stop position shown in FIG. 2. The rounded end 25 of the elastic lock 26 then occupies the notch 29.
  • rollers and the various axes of the system are in the position for which the references which designate them, and which are the same as in the other figures, are assigned the index 1 (and so on: 2 , 3 and 4 for the following times of the operating cycle).
  • the stopping of the sheets 17 is produced by an electric brake acting on the rollers, with production of a control signal for the second cycle time: the rod of the jack 14 comes out and moves the movable support 7 from the chassis 1 , which causes the rollers 2 to open (their axes come in 2a 2 in FIG. 3).
  • rollers 2 (axes in position 2a 3 ) are then always in the open position, but behind the cursor 1 ' 9.
  • the jack 14 is then controlled in the opposite direction, which causes the rollers 2 to close behind the slider 19.
  • the rollers are then in position 2a 4 in FIG. 3 (fourth step of the cycle).
  • This arrangement has the advantage of testing the correct operation of the slider 19 which, if it is defective or improperly engaged on the sections 18, is ejected, which allows an easy and rapid observation of the defect. In addition, this leaves enough room at the rear end of the profiles 18 (behind the cursor) to allow the welding point to be made on the profiles, this welding point constituting a stop for the cursor on the future. bag.
  • Open bags can be obtained (with the exception of the short length closed at the rear, which has just been mentioned), if the rollers 2, being in the maximum closed position, do not cause an inter-engagement of the profiles coupling 18 during the first time of the cycle. Indeed, when the cursor is blocked by the rollers 2 in position 2 . and as the sheets advance, this cursor causes disengagement of the profiles 18, which are coupled at the level of the device for installing the cursors.
  • the invention makes it possible to obtain open or closed bags, of variable widths, without it it is necessary to modify the distance which separates the device for placing cursors from the welding and cutting blade, with cursors whose correct functioning has been tested, and which are always located at a determined distance from the rear end of the profiles, on each bag.

Abstract

La présente invention concerne notamment un appareil de positionnement automatique de curseurs sur des profilés d'accouplement bordant deux feuilles superposées, comportant pour l'essentiel un châssis (1), deux galets mobiles (2) se faisant face, montés aux extrémités libres de deux bras pivotants et aptes, entre autres mouvements, soit à s'écarter l'un de l'autre, pour laisser libre le passage à un curseur monté sur lesdits éléments profilés, soit à se rapprocher l'un de l'autre, et empêcher momentanément ce passage, ce qui, le défilement des feuilles se poursuivant, provoque un déplacement longitudinal, d'amplitude déterminée, dudit curseur sur lesdits éléments.The present invention relates in particular to an apparatus for automatically positioning sliders on coupling profiles bordering two superimposed sheets, essentially comprising a frame (1), two movable rollers (2) facing each other, mounted at the free ends of two pivoting arms capable, among other movements, of either moving away from one another, to allow free passage to a slider mounted on said profiled elements, or of moving towards one another, and preventing momentarily this passage, which, the scrolling of the sheets continuing, causes a longitudinal displacement, of determined amplitude, of said cursor on said elements.

Description

La présente invention concerne d'une façon générale une machine pour la fabrication de sacs en matière plastique constitués de deux feuilles superposéés soudées le long de leurs bords latéraux, le fond restant ouvert ou étant fermé par une ligne de soudage ou de pliage, ces sacs étant équipés d'éléments profilés d'accouplement s'étendant le long des bords de leur ouverture et pouvant s'accoupler par déformation élastique par pression sous l'effet du coulissement d'un curseur, cette machine comportant, entre autres, de façon connue, en aval d'une extrudeuse produisant les feuilles, d'une part un appareil de pose automatique de curseurs, en position opérationnelle, sur des éléments profilés d'accouplement qui s'étendent selon les bords longitudinaux de deux feuilles superposées en défilement, et d'autre part une lame de soudage et de coupe propre à effectuer à la cadence voulue, et ceci lors d'arrêts périodiques du défilement des feuilles, des lignes de soudage transversales constituant les bords latéraux des sacs.The present invention relates generally to a machine for the manufacture of plastic bags consisting of two superimposed sheets welded along their lateral edges, the bottom remaining open or being closed by a welding or folding line, these bags being equipped with profiled coupling elements extending along the edges of their opening and capable of being coupled by elastic deformation by pressure under the effect of the sliding of a slider, this machine comprising, inter alia, in known manner , downstream of an extruder producing the sheets, on the one hand an apparatus for automatically placing sliders, in operational position, on profiled coupling elements which extend along the longitudinal edges of two sheets superimposed in movement, and on the other hand, a welding and cutting blade suitable for carrying out at the desired rate, and this during periodic stops in the running of the sheets, transverse welding lines constituting the side edges of the bags.

Actuellement, certains types de sacs de matière plastique sont élaborés à partir de feuilles d'une telle matière et comportent deux parois opposées en principe soudées par leurs bords latéraux, un pli de la feuille ou une autre ligne de soudure constituant le fond, à moins que les sacs ne soient fournis avec un fond ouvert. A l'opposé du fond s'étendent, le long des bords de l'ouverture du sac, deux éléments profilés, à savoir un sur chaque paroi, lesquels éléments ont des formes com- " plémentaires et peuvent ainsi s'accoupler en se déformant élastiquement par pression sous l'effet du coulissement d'un curseur, ce qui permet commodément à l'utilisateur d'ouvrir ou de fermer le sac de façon répétitive, par simple déplacement du curseur le long desdits éléments. Le curseur est arrêté à chaque extrémité par un point de soudure à l'emplacement duquel les deux profilés sont aplatis et solidarisés, à proximité des bords latéraux des sacs.Currently, certain types of plastic bags are made from sheets of such material and have two opposite walls in principle welded by their lateral edges, a fold of the sheet or another weld line constituting the bottom, unless that the bags are supplied with an open bottom. Opposite the bottom extend, along the edges of the opening of the bag, two profiled elements, namely one on each wall, which elements have complementary shapes and can thus be coupled by deforming elastically by pressure under the effect of the sliding of a slider, which conveniently allows the user to open or close the bag repeatedly, by simply moving the slider along said elements. The slider is stopped each time end with a point of welding where the two sections are flattened and secured, near the side edges of the bags.

Ces sacs sont élaborés en continu à grande cadence, par un procédé d'extrusion, le principe généraldefabri- cation consistant pour l'essentiel à faire défiler deux feuilles superposées qui se déplacent dans la direction de leur longueur, feuilles sur lesquelles une lame de soudage et de coupe descend pour effectuer à la cadence voulue (en fonction de la vitesse de défilement des feuilles et de la largeur désirée pour les sacs), et ceci lors d'un arrêt du défilement, des lignes de soudage transversales constituant les bords latéraux des sacs.These bags are produced continuously at a high rate, by an extrusion process, the general manufacturing principle consisting essentially of running two superimposed sheets which move in the direction of their length, sheets on which a welding blade and cutting down to perform at the desired rate (depending on the speed of movement of the sheets and the desired width for the bags), and this when the scrolling stops, transverse welding lines constituting the lateral edges of the bags.

Lesdits éléments profilés d'accouplement peuvent être extrudés en même temps que la feuille et constituer une partie intégrante de celle-ci, ou être élaborés séparément et être rapportés en continu sur les bords longitudinaux respectifs des feuilles, par soudage ou par collage.Said profiled coupling elements can be extruded at the same time as the sheet and constitute an integral part thereof, or be produced separately and be attached continuously to the respective longitudinal edges of the sheets, by welding or by bonding.

Un appareil approprié, tel par exemple celui qui fait l'objet de la demande de brevet français déposée au nom de la demanderesse le 14 octobre 1980 sous le n° 80 21974,'effectue automatiquement la pose desdits curseurs, qui viennent, en position opérationnelle,coiffer lesdits éléments profilés d'accouplement sur chaque largeur de sac. Cette pose automatique des curseurs s'effectue -bien entendu également à la cadence voulue- en amont du poste de soudage et de coupe transversale des feuilles.A suitable device, such as for example that which is the subject of French patent application filed in the name of the Applicant October 14, 1980 under No. 80 21974, automatically performs the laying of said sliders to come, in the operational position , cover said coupling coupling elements on each bag width. This automatic positioning of the sliders is carried out - of course also at the desired rate - upstream of the welding station and cross section of the sheets.

Ceci étant, le problème se pose du positionnement de chaque curseur selon la longueur desdits éléments profilés d'accouplement, compte tenu du fait que la machine doit pouvoir livrer des sacs de largeur variable. Pour éviter que certains curseurs se trouvent positionnés à l'emplacement auquel il est prévu d'effectuer les points de soudure mentionnés plus haut, ce qui serait la cause d'un incident de fonctionnement, il est en général nécessaire, lorsque l'on passe d'une largeur de sac à une largeur différente, de déplacer l'appareil de pose de curseurs, pour modifier la distance qui le sépare de la lame précitée de soudage et de coupe, et faire en sorte que cette distance reste un multiple exact de la largeur des sacs. Autrement, en effet, les curseurs pourraient se trouver positionnés en des emplacements de la largeur des sacs qui se décaleraient progressivement vers l'un des bords latéraux de ceux-ci, ce qui aboutirait inévitablement à l'incident de fonctionnement précité.This being the case, the problem arises of positioning each slider along the length of said profiled coupling elements, taking into account the fact that the machine must be able to deliver bags of variable width. To prevent certain cursors from being positioned at the location where it is planned to carry out the welding points mentioned above, which would be the cause of a malfunction, it is generally necessary, when passing from bag width to a different width, move the slider setting device, to change the distance between it and the aforementioned welding and cutting blade, and ensure that this distance remains an exact multiple of the width of the bags. Otherwise, in fact, the sliders could be positioned at locations the width of the bags which would shift progressively towards one of the lateral edges of the latter, which would inevitably lead to the abovementioned operating incident.

L'un des buts de la présente invention est d'éviter l'inconvénient que représente le fait d'avoir à déplacer plus ou moins fréquemment l'appareil de pose de curseurs, qui est relativement lourd et encombrant, et de faire en sorte qu'il puisse être fixe, tout en évitant aussi, automatiquement et en toute sécurité, le risque de tout incident de fonctionnement.One of the aims of the present invention is to avoid the disadvantage of having to move the slider installation device, which is relatively heavy and bulky, more or less frequently, and to ensure that '' it can be fixed, while also automatically and safely avoiding the risk of any operational incident.

A cet effet, une machine du type général indiqué au début est , conformément à la présente invention, caractérisée en ce qu'elle comporte en outre, entre ledit appareil de pose de curseurs et ladite lame de soudage et de coupe, un appareil de positionnement automatique desdits curseurs sur lesdits éléments profilés d'accouplement, propre à les amener à une distance déterminée de l'emplacement prévu pour lesdites lignes de soudage transversales, quelle que soit la largeur prévue pour lesdits sacs.To this end, a machine of the general type indicated at the beginning is, in accordance with the present invention, characterized in that it further comprises, between said apparatus for placing cursors and said welding and cutting blade, a positioning apparatus automatic said sliders on said coupling coupling elements, adapted to bring them at a determined distance from the location provided for said transverse welding lines, regardless of the width provided for said bags.

On évite ainsi tout risque qu'un curseur distribué par l'appareil de pose "tombe" à l'emplacement prévu pour lesdites lignes de soudage transversales, et donc tout risque de voir se produire le type d'incident de fonctionnement consistant en ce que la lame de soudage et de coupe écrase un curseur.This avoids any risk that a cursor distributed by the setting device "falls" at the location provided for said transverse welding lines, and therefore any risk of occurring the type of operating incident consisting in that the welding and cutting blade crushes a cursor.

De la sorte, l'appareil de pose de curseurs pourra être fixe, ce qui pourra être plus particulièrement avantageux lorsqu'il est prévu que cet appareil travaille sur des feuilles en défilement dont au moins une partie du parcours est verticale, disposition qui rend plus simples et plus fiables les moyens d'alimentation de l'appareil en curseurs, puisque ceux-ci se déplacent alors par simple gravité dans une goulotte verticale.In this way, the slider fitting device can be fixed, which can be more particularly advantageous when it is planned that this device works on moving sheets of which at least part of the path is vertical, an arrangement which makes it more simple and more reliable means of supplying the device with sliders, since these then move by simple gravity in a vertical chute.

Ainsi, une caractéristique complémentaire d'une machine conforme à l'invention pourra consister en ce que ledit appareil de pose de curseurs est fixe et opère sur une partie verticale du parcours des feuilles en défilement.Thus, an additional characteristic of a machine according to the invention may consist in that said slider fitting device is fixed and operates on a vertical part of the path of the sheets in movement.

La présente invention concerne par ailleurs, et plus particulièrement, la structure et le mode de fonctionnement dudit appareil de positionnement automatique des curseurs.The present invention also relates, and more particularly, to the structure and the operating mode of said automatic cursor positioning device.

Selon une caractéristique de l'invention, à cet égard, ledit appareil sera caractérisé en ce qu'il comporte pour l'essentiel un châssis, un passage prévu pour permettre le défilement desdits éléments profilés d'accouplement qui s'étendent le long des bords longitudinaux de deux feuilles superposées, et, de part et d'autre de ce passage, deux galets se faisant face, montés aux extrémités libres de deux bras pivotants et aptes, entre autres mouvements, soit à s'écarter l'un de l'autre, pour laisser libre le passage à un curseur monté sur lesdits éléments profilés, soit à se rapprocher l'un de l'autre, et empêcher momentanément ce passage, ce qui, le défilement des feuilles se poursuivant"provoque un déplacement longitudinal, d'amplitude déterminée, dudit curseur sur lesdits éléments.According to a characteristic of the invention, in this regard, said device will be characterized in that it essentially comprises a chassis, a passage provided for allowing the scrolling of said profiled coupling elements which extend along the edges longitudinal of two superimposed sheets, and, on either side of this passage, two facing rollers, mounted at the free ends of two pivoting arms and capable, among other movements, of moving away from one of the other, to allow free passage to a slider mounted on said profiled elements, or to approach one another, and momentarily prevent this passage, which, the scrolling of the sheets continuing " causes a longitudinal displacement, d 'determined amplitude, of said cursor on said elements.

On peut ainsi amener automatiquement et commodément les curseurs en un emplacement déterminé de l'espace séparant les emplacements de deux lignes de soudage et de coupe transversales successives, ce qui évite de façon absolument fiable les inconvénients décrits plus haut.It is thus possible to automatically and conveniently bring the cursors to a determined location in the space separating the locations of two successive welding and transverse cutting lines, which absolutely avoids the drawbacks described above.

Un tel appareil de positionnement de curseurs conforme à la présente invention comporte d'autres caractéristiques intéressantes, dont il sera plus explicitement question ci-après, et en particulier des moyens permettant la livraison de sacs terminés ouverts ou fermés, ainsi que d'effectuer un essai du bon fonctionnement de chaque curseur.Such a cursor positioning device in accordance with the present invention has other interesting characteristics, which will be more explicitly discussed below, and in particular means allowing the delivery of finished bags, open or closed, as well as carrying out a testing the proper functioning of each cursor.

Un mode d'exécution d'un appareil de positionnement de curseurs conforme à l'invention va maintenant être décrit à titre d'exemple nullement limitatif, avec référence aux figures du dessin annexé dans lequel :

  • - la figure 1 est une vue en plan schématique et partielle de cet appareil ;
  • - la figure 2 est une vue en coupe axiale par la ligne II-II de la figure 1 ; et
  • - la figure 3 montre schématiquement la cinématique des galets de l'appareil.
An embodiment of a cursor positioning device according to the invention will now be described by way of nonlimiting example, with reference to the figures of the appended drawing in which:
  • - Figure 1 is a schematic and partial plan view of this device;
  • - Figure 2 is an axial sectional view through line II-II of Figure 1; and
  • - Figure 3 shows schematically the kinematics of the rollers of the device.

Sur les différentes figures, ce que l'on peut appeler le châssis de l'appareil a été référencé en 1 et les deux galets, formant entre eux un passage pour les profilés d'accouplement, en 2. Ces galets, qui sont rotatifs autour d'axes 2a, et comportent une gorge 2b, sont montés chacun à l'extrémité libre d'un bras 3 monté pivotant autour d'un axe 4. L'autre extrémité des bras 3 est reliée par une biellette 5 à un axe commun 6 solidaire d'un support mobile 7. Les axes reliant de façon articulée les bras 3 aux biellettes 5 ont été reférencés en 8.In the various figures, what can be called the chassis of the device has been referenced in 1 and the two rollers, forming between them a passage for the coupling profiles, in 2. These rollers, which are rotatable around axes 2a, and have a groove 2b, are each mounted at the free end of an arm 3 mounted to pivot about an axis 4. The other end of the arms 3 is connected by a link 5 to a common axis 6 secured to a mobile support 7. The axes articulated connecting the arms 3 to the links 5 have been referenced at 8.

La position, en butée, du support mobile 7 par rapport au châssis 1, peut être réglée grâce à la rotation d'un bouton moleté 9 monté à l'extrémité d'une vis 10 vissée dans le support et dont l'extrémité libre vient buter, en 11, sur une extrémité du châssis 1. Un contre-écrou 12 permet, après réglage, et par serrage sur la paroi 13 du support 7, de fixer la position de la vis 10 par rapport au support 7.The position, in abutment, of the movable support 7 relative to the chassis 1, can be adjusted by the rotation of a knurled button 9 mounted at the end of a screw 10 screwed into the support and whose free end comes abut, at 11, on one end of the chassis 1. A lock nut 12 allows, after adjustment, and by tightening on the wall 13 of the support 7, to fix the position of the screw 10 relative to the support 7.

Grâce à ces moyens, on pourra régler le degré de pincement maximum des deux galets 2 l'un sur l'autre.Thanks to these means, the maximum degree of pinching of the two rollers 2 can be adjusted one on the other.

Le déplacement du support mobile 7, qui commandera le pivotement des biellettes 5 et leviers 3, et par suite l'ouverture et la fermeture des galets 2, est produit par un vérin pneumatique 14 fixe par rapport au châssis 1 et dont l'extrémité filetée 15 de tige de piston, sur laquelle estmonté aussi un contre-écrou de réglage 16, est vissée dans ledit support. La commande automatique de l'alimentation du cylindre du vérin 14 s'effectue au moyen d'une électro-vanne et de tous moyens détecteurs appropriés (non représentés), ceci en fonction de l'avancement et des arrêts périodiques des feuilles superposées de matière plastique en défilement (dans le sens de la flèche F), lesquelles ont été référencées en 17 et portent sur leurs bords libres longitudinaux des éléments profilés d'accouplement 18 (sur la figure 2, un curseur monté en position opérationnelle sur les profilés 18 à été référencé en 19).The displacement of the mobile support 7, which will control the pivoting of the links 5 and levers 3, and consequently the opening and closing of the rollers 2, is produced by a pneumatic cylinder 14 fixed relative to the chassis 1 and whose threaded end 15 of the piston rod, on which is also mounted an adjusting lock nut 16, is screwed into said support. Automatic feeding control of the cylinder of the jack 14 is effected by means of a solenoid valve and all appropriate detector means (not shown), this as a function of the progress and periodic stops of the superimposed sheets of plastic material in movement (in the direction arrow F), which have been referenced in 17 and bear on their longitudinal free edges of the coupling profile elements 18 (in FIG. 2, a slider mounted in the operational position on the profiles 18 has been referenced in 19).

Quant aux axes d'articulation 4, ils sont solidaires d'un chariot 20 monté coulissant sur le châssis 1. Le coulissement du chariot 20 par rapport au châssis 1 est assuré de chaque côté par des coulisses latérales 21, avec retenue assurée par l'intermédiaire de deux gorges latérales 22 du châssis, sur chacune desquelles coulisse la tête 23 d'une vis 24 fixée dans ledit chariot 20.As for the hinge pins 4, they are integral with a carriage 20 mounted to slide on the chassis 1. The sliding of the carriage 20 relative to the chassis 1 is ensured on each side by lateral slides 21, with retention ensured by the intermediate two lateral grooves 22 of the chassis, on each of which slides the head 23 of a screw 24 fixed in said carriage 20.

Enfin, et dans un but qui sera vu par la suite, le chariot 20 peut être verrouillé élastiquement sur le châssis 1 par l'extrémité arrondie 25, sollicitée vers l'extérieur par un ressort interne, d'une vis de verrou élastique 26 à écrou 27 fixée sur le chariot 20, cette extrémité pouvant venir occuper l'une de deux encoches 28 ou 29 du châssis 1.Finally, and for a purpose which will be seen later, the carriage 20 can be resiliently locked on the frame 1 by the rounded end 25, urged outward by an internal spring, with an elastic lock screw 26 to nut 27 fixed on the carriage 20, this end being able to occupy one of two notches 28 or 29 of the chassis 1.

Ceci étant, le fonctionnement de l'appareil qui vient d'être décrit est le suivant : un curseur 19 étant arrivé dans la position représentée à la figure 3, le vérin 14 a été commandé, lors du temps précédent du cycle, de sorte que sa tige est rentrée au maximum dans son corps, ce qui a amené le support mobile 7 dans la position avant de butée représentée à la figure 2. L'extrémité arrondie 25 du verrou élastique 26 occupe alors l'encoche 29.That said, the operation of the device which has just been described is as follows: a cursor 19 having arrived in the position shown in FIG. 3, the jack 14 was controlled, during the preceding cycle time, so that its rod is retracted as far as possible into its body, which has brought the movable support 7 into the front stop position shown in FIG. 2. The rounded end 25 of the elastic lock 26 then occupies the notch 29.

Ce déplacement du support mobile 7 vers l'avant, c'est-à-dire vers le bas, a provoqué le rapprochement maximum des deux galets 2 l'un vers l'autre, par suite du pivotement des biellettes 5 et bras 3 ; ces galets empêchent alors le passage vers l'avant dudit curseur 19, lequel reste bloqué derrière les galets 2, tandis que les feuilles 17 continuent à défiler dans le sens de la flèche F. L'emplacement de la ligne de soudage et de coupe transversale arrière des feuilles avance donc vers le curseur 19, lequel se trouvera ainsi, sur le sac correspondant une fois terminé, à proximité de l'extrémité arrière des profilés d'accouplement 18.This displacement of the movable support 7 forward, that is to say downward, has caused the maximum approximation of the two rollers 2 towards one another, as a result of the pivoting of the links 5 and arms 3; these rollers then prevent the passage forwards of said cursor 19, which remains blocked behind the rollers 2, while the sheets 17 continue to run in the direction of the arrow F. The location of the welding line and rear cross section of the sheets therefore advances towards the cursor 19, which will thus be , on the corresponding bag when finished, near the rear end of the coupling profiles 18.

Sur la figure 3, les galets et les différents axes du système sont dans la position pour laquelle les références qui les désignent, et qui sont les mêmes que sur les autres figures, sont affectées de l'indice 1 (et ainsi de suite : 2, 3 et 4 pour les temps suivants du cycle de fonctionnement).In FIG. 3, the rollers and the various axes of the system are in the position for which the references which designate them, and which are the same as in the other figures, are assigned the index 1 (and so on: 2 , 3 and 4 for the following times of the operating cycle).

A ce moment, l'arrêt des feuilles 17 est produit par un frein électrique agissant sur les rouleaux, avec production d'un signal de commande du second temps du cycle : la tige du vérin 14 sort et écarte le support mobile 7 du châssis 1, ce qui provoque l'ouverture des galets 2 (leurs axes viennent en 2a 2 sur la figure 3).At this time, the stopping of the sheets 17 is produced by an electric brake acting on the rollers, with production of a control signal for the second cycle time: the rod of the jack 14 comes out and moves the movable support 7 from the chassis 1 , which causes the rollers 2 to open (their axes come in 2a 2 in FIG. 3).

Lorsque les galets sont à pleine ouverture et que les bras 3 sont alors bloqués (dans la position de la figure 1), une poursuite de la manoeuvre du vérin 14 provoque un déplacement du chariot 20 vers l'arrière, c'est-à-dire vers le haut, l'extrémité arrondie 25 du verrou élastique 26 quittant l'encoche 29 du châssis pour venir occuper l'encoche 28. Le système est alors arrivé au troisième temps du cycle de son fonctionnement (indices 3 des références sur la figure 3).When the rollers are at full opening and the arms 3 are then locked (in the position of FIG. 1), further operation of the jack 14 causes the carriage 20 to move backwards, that is to say say upwards, the rounded end 25 of the elastic lock 26 leaving the notch 29 of the chassis to occupy the notch 28. The system then arrived at the third stage of the cycle of its operation (indices 3 of the references in the figure 3).

Les galets 2 (axes en position 2a3)sont alors toujours en position ouverte, mais derrière le curseur 1'9.The rollers 2 (axes in position 2a 3 ) are then always in the open position, but behind the cursor 1 ' 9.

Le vérin 14 est alors commandé en sens inverse, ce qui provoque la fermeture des galets 2 derrière le curseur 19. Les galets sont alors dans la position 2a4 de la figure 3 (quatrième temps du cycle).The jack 14 is then controlled in the opposite direction, which causes the rollers 2 to close behind the slider 19. The rollers are then in position 2a 4 in FIG. 3 (fourth step of the cycle).

Les galets 2 étant fermés sur les profilés 18, les bras pivotants 3 se trouvent à nouveau bloqués et une poursuite de la manoeuvre du vérin 14 ne peut plus que ramener le chariot 20 vers l'avant, c'est-à-dire vers la position qu'il occupait lors du premier temps du cycle, l'extrémité arrondie 25 du verrou élastique 26 quittant cette fois l'encoche 28 du châssis pour revenir dans l'encoche 29.The rollers 2 being closed on the profiles 18, the pivoting arms 3 are again blocked and continued operation of the jack 14 can only bring the carriage 20 forward, that is to say towards the position it occupied during the first stage of the cycle, the rounded end 25 of the elastic lock 26 this time leaving the notch 28 of the chassis to return to the notch 29.

Lors de ce déplacement vers l'avant du chariot 20 avec les galets 2 fermés (les feuilles 17 étant toujours à l'arrêt), le curseur 19 est légèrement déplacé vers l'avant sur les profilés 18, en provoquant leur accouplement sur une faible longueur.During this forward movement of the carriage 20 with the rollers 2 closed (the sheets 17 still being stopped), the cursor 19 is slightly moved forward on the profiles 18, causing them to couple on a low length.

Cette disposition présente l'avantage de tester le bon fonctionnement du curseur 19 qui, s'il est défectueux ou mal engagé sur les profilés 18, est éjecté, ce qui permet une constatation facile et rapide du défaut. En outre, cela laisse suffisamment de place à l'extrémité arrière des profilés 18 (derrière le curseur) pour permettre d'effectuer le point de soudure sur les profilés, ce point de soudure constituant une butée d'arrêt pour le curseur sur le futur sac.This arrangement has the advantage of testing the correct operation of the slider 19 which, if it is defective or improperly engaged on the sections 18, is ejected, which allows an easy and rapid observation of the defect. In addition, this leaves enough room at the rear end of the profiles 18 (behind the cursor) to allow the welding point to be made on the profiles, this welding point constituting a stop for the cursor on the future. bag.

Ensuite de quoi, étant revenu au premier temps du cycle, les feuilles sont remises en défilement et le fonctionnement du système recommence de la même manière.After which, having returned to the first stage of the cycle, the sheets are put back into scrolling and the operation of the system starts again in the same way.

On peut obtenir des sacs ouverts (à l'exception de la petite longueur fermée à l'arrière, dont il vient d'être question), si les galets 2, étant en position fermée maximale, ne provoquent pas un inter-engagement des profilés d'accouplement 18 pendant le premier temps du cycle. En effet, lorsque le curseur est bloqué par les galets 2 en position 2. et que les feuilles avancent, ce curseur provoque un désengagement des profilés 18, lesquels sont accouplés au niveau de l'appareil de pose des curseurs.Open bags can be obtained (with the exception of the short length closed at the rear, which has just been mentioned), if the rollers 2, being in the maximum closed position, do not cause an inter-engagement of the profiles coupling 18 during the first time of the cycle. Indeed, when the cursor is blocked by the rollers 2 in position 2 . and as the sheets advance, this cursor causes disengagement of the profiles 18, which are coupled at the level of the device for installing the cursors.

En agissant sur le bouton moleté 9, on peut toutefois faire en sorte qu'en position fermée au maximum les galets 2 pincent suffisamment les profilés 18 pendant le premier temps du cycle pour en provoquer l'accouplement. On obtient alors des sacs entièrement fermés.By acting on the knurled button 9, it is however possible to ensure that in the closed position as much as possible the rollers 2 pinch the sections 18 sufficiently during the first time of the cycle to cause them to couple. We then obtain fully closed bags.

On voit ainsi que l'invention permet d'obtenir des sacs ouverts ou fermés, de largeurs variables, sans qu'il soit nécessaire de modifier la distance qui sépare l'appareil de pose de curseurs de la lame de soudage et de coupe, avec des curseurs dont le bon fonctionnement a été testé, et qui se trouvent toujours à une distance déterminée de l'extrémité arrière des profilés, sur chaque sac.It can thus be seen that the invention makes it possible to obtain open or closed bags, of variable widths, without it it is necessary to modify the distance which separates the device for placing cursors from the welding and cutting blade, with cursors whose correct functioning has been tested, and which are always located at a determined distance from the rear end of the profiles, on each bag.

Comme il va de soi, et comme il résulte d'ailleurs déjà de ce qui précède, l'invention ne se limite nullement à ceux de ses modes d'application et de réalisation qui ont été plus particulièrement envisagés ; elle en embrasse, au contraire, toutes les variantes.As goes without saying, and as it already follows from the above, the invention is in no way limited to those of its modes of application and embodiments which have been more particularly envisaged; on the contrary, it embraces all its variants.

Claims (13)

1. Machine pour la fabrication de sacs en matière plastique constitués de deux feuilles superposées soudées le long de leurs bords latéraux, le fond restant ouvert ou étant fermé par une ligne de soudage ou de pliage, ces sacs étant équipés d'éléments profilés d'accouplement s'étendant le long des bords de leur ouverture et pouvant s'accoupler par déformation élastique par pression sous l'effet du coulissement d'un curseur, cette machine comportant, entre autres, de façon connue, en aval d'une extrudeuse produisant les feuilles, d'une part un appareil de pose automatique de curseurs, en position opérationnelle, sur des éléments profilés d'accouplement qui s'étendent selon les bords longitudinaux de deux feuilles superposées en défilement, et d'autre part une lame de soudage et de coupe propre à effectuer à la cadence voulue,et ceci lors d'arrêts périodiques du défilement des feuilles, des lignes de soudage transversales constituant les bords latéraux des sacs, caractérisée en ce qu'elle comporte en outre, entre ledit appareil de pose de curseurs et ladite lame de soudage et de coupe, un appareil de positionnement automatique desdits curseurs sur lesdits éléments profilés d'accouplement, propre à les amener à une distance déterminée de l'emplacement prévu pour lesdites lignes de soudage transversales, quelle que soit la largeur prévue pour lesdits sacs.1. Machine for the manufacture of plastic bags consisting of two superimposed sheets welded along their lateral edges, the bottom remaining open or being closed by a welding or folding line, these bags being equipped with profiled elements coupling extending along the edges of their opening and capable of coupling by elastic deformation by pressure under the effect of the sliding of a slider, this machine comprising, inter alia, in known manner, downstream of an extruder producing the sheets, on the one hand an automatic positioning device for sliders, in the operational position, on profiled coupling elements which extend along the longitudinal edges of two superimposed sheets in movement, and on the other hand a welding blade and cutting proper to perform at the desired rate, and this during periodic stops in the running of the sheets, transverse welding lines constituting the lateral edges of the bags, characterized in that it e further comprises, between said slider setting device and said welding and cutting blade, an automatic positioning device for said sliders on said coupling coupling elements, capable of bringing them at a determined distance from the location provided for said transverse welding lines, whatever the width provided for said bags. 2. Machine selon la revendication 1, caractérisée en ce que ledit appareil de pose de curseurs est fixe et opère sur une partie verticale du parcours des feuilles en défilement.2. Machine according to claim 1, characterized in that said slider fitting device is fixed and operates on a vertical part of the path of the sheets in movement. 3. Appareil de positionnement automatique de curseurs destiné à équiper une machine conforme à la revendication 1 ou 2, caractérisé en ce qu'il comporte pour l'essentiel un châssis (1), un passage prévu pour permettre le défilement desdits éléments profilés d'accouplement (18) qui s'étendent le long des bords longitudinaux de deux feuilles superposées (17),et, de part et d'autre de ce passage, deux galets se faisant face (2), montés aux extrémités libres de deux bras pivotants (3) et aptes, entre autres mouvements, soit à s'écarter l'un de l'autre, pour laisser libre le passage à un curseur (19) monté sur lesdits éléments profilés, soit à se rapprocher l'un de l'autre, et empêcher momentanément ce passage, ce qui, le défilement des feuilles se poursuivant, provoque un déplacement relatif longitudinal, d'amplitude déterminée, dudit curseur sur lesdits éléments.3. Automatic positioning device for sliders intended to equip a machine according to claim 1 or 2, characterized in that it essentially comprises a frame (1), a passage provided for allowing the scrolling of said profiled elements of coupling (18) which extend along the longitudinal edges of two superimposed sheets (17), and on either side of this pitch wise, two facing rollers (2), mounted at the free ends of two pivoting arms (3) and able, among other movements, to move away from each other, to allow free passage to a slider (19) mounted on said profiled elements, that is to approach each other, and momentarily prevent this passage, which, the scrolling of the sheets continuing, causes a relative longitudinal displacement, of determined amplitude, of said cursor on said items. 4. Appareil selon la revendication 3, caractérisé en ce que les extrémités opposées aux extrémités libres des deux bras (3) sont reliées de façon articulée chacune à une biellette (5), les deux biellettes (5) étant reliées à un axe commun (6) monté sur un support mobile (7), lequel est relié opérativement à un moyen moteur -vérin pneumatique (14) ou analogue- commandé automatiquement en fonction de l'avancement et des arrêts périodiques desdites feuilles (17).4. Apparatus according to claim 3, characterized in that the ends opposite to the free ends of the two arms (3) are connected in an articulated manner each to a link (5), the two links (5) being connected to a common axis ( 6) mounted on a mobile support (7), which is operatively connected to a motor means - pneumatic cylinder (14) or the like - automatically controlled according to the progress and periodic stops of said sheets (17). 5. Appareil selon la revendication 4, caractérisé en ce que la position de rapprochement maximale entre ledit support mobile (7) et le châssis (1) est déterminée par une butée réglable (9,10).5. Apparatus according to claim 4, characterized in that the position of maximum approximation between said movable support (7) and the frame (1) is determined by an adjustable stop (9,10). 6. Appareil selon la revendication 5, caractérisé en ce que la mise en butée est assurée par l'extrémité libre d'une vis (10) vissée dans le support mobile (7), laquelle extrémité peut venir en appui sur une paroi (11) dudit châssis (1), l'autre extrémité de cette vis étant pourvue d'un bouton moleté de réglage (9).6. Apparatus according to claim 5, characterized in that the abutment is ensured by the free end of a screw (10) screwed into the movable support (7), which end can come to bear on a wall (11 ) of said chassis (1), the other end of this screw being provided with a knurled adjustment knob (9). 7. Appareil selon l'une quelconque des revendications 4 à 6, caractérisé en ce que lesdits bras (3) sont montés rotatifs chacun autour d'un axe (4), les deux axes (4) étant solidaires d'un chariot (20) guidé de façon coulissante, en direction longitudinale, sur ledit châssis (1).7. Apparatus according to any one of claims 4 to 6, characterized in that said arms (3) are rotatably mounted each around an axis (4), the two axes (4) being integral with a carriage (20 ) slidingly guided in a longitudinal direction on said chassis (1). 8. Appareil selon la revendication 7, caractérisé en ce que ledit chariot coulissant (20) peut être verrouillé élastiquement en deux positions différentes, espacées longitudinalement, sur ledit châssis (1).8. Apparatus according to claim 7, characterized in that said sliding carriage (20) can be resiliently locked in two different positions, spaced apart longitudinally, on said chassis (1). 9. Appareil selon la revendication 8, caractérisé en ce que le verrouillage élastique est assuré par l'extrémité arrondie (25) d'une vis de verrou élastique (26) solidaire du chariot (20), cette extrémité pouvant s'engager élastiquement et sélectivement dans l'une ou l'autre de deux encoches (28,29) dudit châssis.9. Apparatus according to claim 8, characterized in that the elastic locking is provided by the rounded end (25) of an elastic locking screw (26) secured to the carriage (20), this end being able to engage elastically and selectively in one or the other of two notches (28, 29) of said chassis. 10. Mode de fonctionnement d'un appareil conforme à l'une quelconque des revendications 3 à 9, caractérisé par un premier temps du cycle de fonctionnement, pendant lequel les deux galets (2) sont rapprochés au maximum en pinçant lesdits éléments profilés (18), ce qui bloque l'avance du curseur (19), lequel vient buter derrière les galets.10. Operating mode of an apparatus according to any one of claims 3 to 9, characterized by a first step of the operating cycle, during which the two rollers (2) are brought together as much as possible by pinching said profiled elements (18 ), which blocks the advance of the cursor (19), which abuts behind the rollers. 11. Mode de fonctionnement selon la revendication 10, caractérisé par un second temps du cycle de fonctionnement, pendant lequel, le défilement desdites feuilles superposées (17) étant momentanément stoppé, les deux galets (2) sont ouverts, de sorte à pouvoir passer de part et d'autre du curseur (19), et ceci lorsque l'emplacement prévu sur lesdites feuilles pour la future ligne transversale de soudage et de coupe est arrivé à une distance déterminée -relativement courte- derrière ledit curseur (19).11. Operating mode according to claim 10, characterized by a second time of the operating cycle, during which, the running of said superimposed sheets (17) being momentarily stopped, the two rollers (2) are open, so as to be able to pass from on either side of the cursor (19), and this when the location provided on said sheets for the future transverse welding and cutting line has arrived at a determined distance - relatively short - behind said cursor (19). 12. Mode de fonctionnement selon la revendication 10 ou 11, caractérisé par un troisième temps du cycle de fonctionnement, pour lequel, à partir de la pleine ouverture des galets (2), le chariot coulissant (20) est déverrouillé élastiquement par rapport audit châssis (1), grâce à quoi il peut coulisser vers l'arrière, sous l'action dudit moyen moteur jusqu'en une position relative pour laquelle il se reverrouille élastiquement sur ledit châssis, les galets (2) restant toujours en position de pleine ouverture, mais se situant alors en arrière dudit curseur (19).12. Operating mode according to claim 10 or 11, characterized by a third stage of the operating cycle, for which, from the full opening of the rollers (2), the sliding carriage (20) is unlocked elastically relative to said chassis (1), whereby it can slide backwards, under the action of said drive means to a relative position for which it resiliently locks on said chassis, the rollers (2) always remaining in the fully open position , but then lying behind said cursor (19). 13. Mode de fonctionnement selon l'une quelconque des revendications 10 à 12, caractérisé par un quatrième temps du cycle de fonctionnement, pendant lequel un actionnement en sens inverse dudit moyen moteur provoque tout d'abord une fermeture desdits galets sur les éléments profilés d'accouplement (18), puis, à partir du moment où les galets sont fermés sur lesdits profilés, le déverrouillage élastique du chariot coulissant (20) par rapport au châssis (1) et un avancement dudit chariot, mouvement pendant lequel, jusqu'à ce que le chariot se reverrouille dans la première position de verrouillage élastique précitée, le curseur est coulissé sur une faible longueur sur les profilés d'accouplement, à partir de sa position la plus en arrière, ce qui permet d'en tester le bon fonctionnement.13. Operating mode according to any one of claims 10 to 12, characterized by a fourth time of the operating cycle, during which an actuation in the opposite direction of said motor means causes firstly a closing of said rollers on the coupling profile elements (18), then, from the moment the rollers are closed on said profiles, the elastic unlocking of the sliding carriage (20) relative to the chassis (1) and an advancement of said carriage, movement during which, until the carriage relocks in the aforementioned first elastic locking position, the cursor is slid over a short length on the coupling profiles, from its most back, which allows you to test its proper functioning.
EP83401730A 1982-08-31 1983-08-31 Machine and working cycle for making plastic bags with a zip fastener and device for positioning them Expired EP0102301B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8214887A FR2532162B1 (en) 1982-08-31 1982-08-31 MACHINE FOR MANUFACTURING PLASTIC BAGS WHICH CAN BE OPENED OR CLOSED BY A CURSOR, CURSOR POSITIONING APPARATUS, EQUIPPED WITH SUCH A MACHINE; HOW IT WORKS
FR8214887 1982-08-31

Publications (3)

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EP0102301A2 true EP0102301A2 (en) 1984-03-07
EP0102301A3 EP0102301A3 (en) 1985-05-29
EP0102301B1 EP0102301B1 (en) 1987-11-11

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EP83401730A Expired EP0102301B1 (en) 1982-08-31 1983-08-31 Machine and working cycle for making plastic bags with a zip fastener and device for positioning them

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US (1) US4581006A (en)
EP (1) EP0102301B1 (en)
DE (1) DE3374377D1 (en)
FR (1) FR2532162B1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160917A2 (en) * 1984-05-11 1985-11-13 Yoshida Kogyo K.K. Apparatus for automatically closing a slide fastener
EP0175234A2 (en) * 1984-09-20 1986-03-26 Yoshida Kogyo K.K. Device for pulling up slider of a slide fastener chain
WO1999036325A1 (en) 1998-01-16 1999-07-22 Flexico-France Bag with complementary formed closing sections actuated by a slide and method, apparatus and film for producing same
WO1999056947A1 (en) 1998-05-05 1999-11-11 Flexico-France Method for producing bags comprising closure profiles actuated by a slider
WO1999065353A1 (en) 1998-06-17 1999-12-23 Flexico-France Bag comprising matching closing sections actuated by a slider
FR2780038A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl Bag with interlocking closure sections actuated by slider
FR2780036A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl Bag with interlocking closure sections actuated by slider
FR2785259A1 (en) 1998-11-02 2000-05-05 Flexico France Sarl BAG COMPRISING ADDITIONAL CLOSING CLOSURE PROFILES
WO2000064765A1 (en) 1999-04-27 2000-11-02 Flexico-France Bag comprising slide-actuated closing profiles
US6334709B1 (en) 1998-06-03 2002-01-01 Flexico-France Stack of bags having cursors initialed positioned offset from each other
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EP0175234A2 (en) * 1984-09-20 1986-03-26 Yoshida Kogyo K.K. Device for pulling up slider of a slide fastener chain
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WO1999036325A1 (en) 1998-01-16 1999-07-22 Flexico-France Bag with complementary formed closing sections actuated by a slide and method, apparatus and film for producing same
WO1999056947A1 (en) 1998-05-05 1999-11-11 Flexico-France Method for producing bags comprising closure profiles actuated by a slider
US6666580B2 (en) 1998-05-05 2003-12-23 Flexico-France Method for producing bags comprising closure profiles actuated by a slider
US6477821B1 (en) 1998-05-05 2002-11-12 Flexico-France Method for producing bags comprising closure profiles actuated by a slider
US6334709B1 (en) 1998-06-03 2002-01-01 Flexico-France Stack of bags having cursors initialed positioned offset from each other
US6632021B2 (en) 1998-06-17 2003-10-14 Illinois Tool Works Inc. Bag having slider-actuated complementary closure strips and a leakproofing structure
WO1999065353A1 (en) 1998-06-17 1999-12-23 Flexico-France Bag comprising matching closing sections actuated by a slider
US7517150B2 (en) 1998-06-17 2009-04-14 S2F Flexico Bag having cursor-actuated complementary closure strips
US7140772B2 (en) 1998-06-17 2006-11-28 S2F Flexico Bag having slider-actuated complimentary closure strips and a leakproofing structure
US6902321B2 (en) 1998-06-17 2005-06-07 S2F Flexico Bag having cursor-actuated complementary closure strips with additional leakproofing structure
US6761481B1 (en) 1998-06-17 2004-07-13 Flexico-France Bag comprising matching closing sections actuated by a slider
US6755569B2 (en) 1998-06-17 2004-06-29 Flexico-France Bag having cursor-actuated complementary closure strips with additional leakproofing structure
FR2780037A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl BAG INCLUDING ADDITIONAL CLOSING CLOSURE PROFILES
US6733178B2 (en) 1998-06-17 2004-05-11 Flexico-France Bag having cursor-actuated complementary closure strips
FR2780038A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl Bag with interlocking closure sections actuated by slider
FR2780036A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl Bag with interlocking closure sections actuated by slider
US6609827B2 (en) 1998-06-17 2003-08-26 Illinois Tool Works, Inc. Bag having slider-actuated complementary closure strips and a leakproofing structure
FR2780039A1 (en) 1998-06-17 1999-12-24 Flexico France Sarl BAG INCLUDING ADDITIONAL CLOSING CLOSURE PROFILES
US6305844B1 (en) 1998-11-02 2001-10-23 Flexico-France Bag comprising complementary closure strips actuated by a cursor
EP1000559A2 (en) 1998-11-02 2000-05-17 Flexico-France Bag with zip-lock closure actuated by a slider
FR2785259A1 (en) 1998-11-02 2000-05-05 Flexico France Sarl BAG COMPRISING ADDITIONAL CLOSING CLOSURE PROFILES
US6402376B1 (en) 1999-04-27 2002-06-11 Flexico-France Bag comprising slide-actuated closing profiles
FR2792812A1 (en) 1999-04-27 2000-11-03 Flexico France Sarl BAG COMPRISING CURSOR-OPERATED CLOSING PROFILES
WO2000064765A1 (en) 1999-04-27 2000-11-02 Flexico-France Bag comprising slide-actuated closing profiles
FR2824806A1 (en) 2001-05-15 2002-11-22 Flexico France Sarl Plastic bag making machine and procedure for bags with closing strips operated by sliders has closures inserted into folds made in film layer

Also Published As

Publication number Publication date
US4581006A (en) 1986-04-08
EP0102301B1 (en) 1987-11-11
EP0102301A3 (en) 1985-05-29
FR2532162A1 (en) 1984-03-02
DE3374377D1 (en) 1987-12-17
FR2532162B1 (en) 1986-05-09

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