EP1107863A1 - Device and method for making packaging bags - Google Patents

Device and method for making packaging bags

Info

Publication number
EP1107863A1
EP1107863A1 EP00949619A EP00949619A EP1107863A1 EP 1107863 A1 EP1107863 A1 EP 1107863A1 EP 00949619 A EP00949619 A EP 00949619A EP 00949619 A EP00949619 A EP 00949619A EP 1107863 A1 EP1107863 A1 EP 1107863A1
Authority
EP
European Patent Office
Prior art keywords
film
strip
sensor
opening
movement
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
EP00949619A
Other languages
German (de)
French (fr)
Other versions
EP1107863B1 (en
Inventor
Henri Georges Bois
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexico France SARL
Original Assignee
Flexico France SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flexico France SARL filed Critical Flexico France SARL
Publication of EP1107863A1 publication Critical patent/EP1107863A1/en
Application granted granted Critical
Publication of EP1107863B1 publication Critical patent/EP1107863B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • 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

Definitions

  • the present invention relates to the field of the manufacture of packaging bags. More specifically, the present invention relates to devices for manufacturing packaging bags by continuous movement of a film fitted with at least one strip with an opening / closing function. Even more precisely, the present invention preferably applies to devices for manufacturing bags in which the strip with opening / closing function is arranged transversely to the direction of travel of the film.
  • the present invention is not limited to this specific application.
  • the invention can also be applied to devices in which said strips with an opening / closing function are arranged parallel to the direction of travel of the film or at an angle to this direction.
  • the opening / closing strip can take many forms.
  • the strip with an opening / closing function can be formed of complementary closing profiles, for example male / female profiles, or with complementary hooks, arranged on opposite faces of the film.
  • the strip with an opening / closing function can also be formed from a profile or a tear-out / cutting strip, from an adhesive strip, peelable or not, or also from a metal strip for closing by folding, etc ...
  • Such devices for manufacturing packaging bags with horizontal or vertical scrolling are known.
  • machines known as FFS are known for the English expression “Form, Fill and Seal”, that is to say a machine designed for forming bags, filling and then closing them automatically.
  • FFS machines are known in particular comprising: means of conveying a film in the planar state,
  • these latter means are generally designed to ensure almost simultaneously a weld constituting for example the bottom of an upstream bag in the direction of travel, a second weld at the mouth of a downstream bag, and a sectioning of tubular film to isolate the finished downstream bag from the upstream bag during preparation.
  • machines are known today comprising a station designed for fixing the strip with an opening / closing function, on the film, upstream of the forming neck, transversely with respect to the direction of movement of the film.
  • the closure strip can be deposited longitudinally, that is to say parallel to the direction of movement of the film, or obliquely with respect to this direction.
  • the present invention now aims to improve the known packaging bag manufacturing devices by allowing reliable detection of the positioning of the strip with opening / closing function.
  • This object is achieved in the context of the present invention, thanks to a bag-forming device comprising at least one sensor capable of detecting the presence of a strip with an open / close function, in a predetermined relative position relative to the cyclic film processing means for the formation of the sachet, in particular with respect to the transverse fixing means of the film making up the sachet, provided on the device.
  • the senor consists of a mechanical probe.
  • the present invention also relates to a method for forming sachets.
  • FIG. 1 represents a schematic view of a device for forming packaging bags in accordance with the present invention
  • FIGS. 2 and 3 show views on an enlarged scale of a sensor according to the present invention, respectively in the case of a detection of correct positioning of a strip and in the case of an incorrect position detection of that -this,
  • FIG. 4 represents a partial side view of the device illustrating the location of the sensor
  • Figures 5, 6, 7 and 8 show two views similar to Figures 2 and 3, in the case of a double sensor and respectively on the assumption of correct positioning detection for Figure 5 and incorrect positioning for Figures 6, 7 and 8 of the strip in question.
  • the description which follows will relate essentially to a device in which the closure / opening strip is arranged transversely to the direction of movement of the film.
  • the invention is not limited to this provision.
  • the invention also applies to devices in which the strip of closing / opening is placed parallel or oblique to the direction of movement of the film.
  • FIG 1 a device for forming packaging bags to which particularly applies, but is not limited to, the invention.
  • This is a FFS type machine with vertical scrolling.
  • the film 12 is guided using different rollers or equivalent means which will not be described in detail below, insofar as they can be the subject of numerous variant embodiments.
  • the device comprises downstream of the roller 10 a station 14 at which a strip with an opening / closing function is deposited on the film 12 transversely to the direction of movement of this film.
  • the film 12 then reaches a forming neck 16.
  • the latter is shaped so that at the exit from the forming neck 16, the film 12 is in the tubular state.
  • a filling chute 18 superimposed on the forming neck 16 opens into the tube thus formed.
  • the filling chute 18 is used to introduce the product to be packaged into the blanks of sachets formed by the above-mentioned tubular film.
  • Means shown diagrammatically in FIG. 1 under the reference 20 are designed to ensure the longitudinal closing of the tubular film, for example by thermal welding. Downstream of this station 20, there is an assembly 30 designed to ensure:
  • sectioning means 36 inserted between the aforementioned means 32 and 34, a sectioning of the film to separate the finished downstream bag from the upstream bag blank, and - Optionally using means 38, the finishing of the fixing of the strip with opening / closing function on the wall of the film.
  • the strip with opening / closing function can be fixed, at the level of the station 14, only over half the width of the film, the fixing on the other half of the width of the film being carried out. downstream of the forming neck 16, using the aforementioned means 38.
  • the machine illustrated in FIG. 1 is a vertical scrolling machine.
  • the present invention also applies to machines with horizontal scrolling.
  • the present invention can also find application in bag-forming devices using a film 12 pre-provided with strips with a transverse opening / closing function at the level of the reel 10.
  • the invention applies to pouch forming devices in which the strip with closing opening function is attached to the film 12 at a location different from that illustrated in FIG. 1, for example at the level of the forming neck 16 or downstream thereof.
  • the present invention applies to any type of band with the function of opening / closing of sachets, in particular the bands comprising complementary closure profiles, such as male / female or with complementary hooks, tear / cut tapes, adhesive tapes, peelable or not, metal strips for closing by folding, etc.
  • the strip with opening / closing function has the general reference 60.
  • the present invention applies to any type of film 12, such as for example plastic films, simple or composite, metallized films, etc.
  • the sensor 100 consists of a mechanical feeler comprising a pusher 102 biased towards the film 12, which is sandwiched between the feeler or pusher 102 and a stop 110 forming an anvil.
  • the pusher 102 is associated with an electrical contactor 104 sensitive to the position of the pusher 102, that is to say closed or open, depending on whether the closing / opening strip 60 is present or not and whether or not forms an additional thickness between the stop 110 and pusher 102.
  • the senor 100 is placed downstream of the jaws 100 ensuring the transverse welding of the film.
  • the sensor 100 and the anvil 110 are carried by the jaw support unit 30 so that the anvil 110 and the sensor 100 are cyclically distant and brought closer to the film 12 in synchronism with the jaws of welding 30 so as not to disturb the movement of the film 12.
  • the sensor 100 is located at the longitudinal edge of the sachet opposite to that by which the strip with opening / closing function 60 is conveyed.
  • FIG. 4 shows diagrammatically under the arrow referenced A the routing of this strip 60.
  • the sensor 100 makes it possible to detect both: - the presence of the strip 60 with an open / close function, - the correct routing in the transverse direction, of the strip 60, that is to say the verification of the coverage of the film by the strip 60 (in the event of a defect, the strip 60 does not cover the entire mouth of the sachet, we can expect a failure to subsequently close, or even a leak), and - the correct positioning of the strip 60 in the longitudinal direction relative to the direction of travel of the film (a positioning fault in this direction would lead to a positioning fault of the strip with opening / closing function relative to the mouth of the bag).
  • FIG. 2 thus illustrates the case of correct positioning of the strip 60 relative to the welding jaws 30.
  • FIG. 3 illustrates the case of detection of incorrect position of the strip. 60 (in this case, the strip 60 is situated too far in front of the running of the film).
  • the present invention thus makes it possible to eliminate drifts due in particular to the intrinsic elasticity of the film 12, to see deformations of the latter due to its quality, or even, depending on the type of products packaged or the way in which the product is poured into the sachets through the chute 18.
  • the present invention also applies to devices in which the opening / closing strip is arranged not transversely, but longitudinally, that is to say parallel to the direction of displacement of the film or even obliquely with respect to this direction (it suffices to adapt the position of the sensors).
  • at least two sensors can be provided respectively near each edge of the bag, according to an oblique generatrix with respect to the direction of movement of the film, corresponding to the expected oblique position of the strip.
  • the present invention is not limited to the particular embodiments which have just been described, but extends to all variants in accordance with its spirit.

Abstract

An apparatus for forming reclosable bags, wherein said bags are formed from a continuously film ( 12 ) fitted with at least one closure tape ( 60 ), wherein the apparatus comprises a set of heat-sealed jaws ( 30 ) provided transversely relative to the travel direction of the film ( 12 ), at least one sensor ( 100 ) that if the tape ( 60 ) is present or not on the film in a predetermined position relative to the heat-sealed jaws, and means suitable to reposition correctly the film in regard of the heat-sealed jaws when the sensor detects a default in the position of the tape, so as to eliminate drift due to the elasticity of the film.

Description

DISPOSITIF ET PROCEDE POUR LA FABRICATION DE SACHETS D'EMBALLAGE DEVICE AND METHOD FOR MANUFACTURING PACKAGING BAGS
La présente invention concerne le domaine de la fabrication de sachets d'emballage. Plus précisément, la présente invention concerne les dispositifs de fabrication de sachets d'emballage par défilement continu d'un film équipé d'au moins une bande à fonction d'ouverture/fermeture. Plus précisément encore, la présente invention s'applique de préférence aux dispositifs de fabrication de sachets dans lesquels la bande à fonction d'ouverture/fermeture est disposée transversalement à la direction de défilement du film.The present invention relates to the field of the manufacture of packaging bags. More specifically, the present invention relates to devices for manufacturing packaging bags by continuous movement of a film fitted with at least one strip with an opening / closing function. Even more precisely, the present invention preferably applies to devices for manufacturing bags in which the strip with opening / closing function is arranged transversely to the direction of travel of the film.
Cependant, comme on le précisera par la suite, la présente invention n'est pas limitée à cette application précise. L'invention peut également s'appliquer à des dispositifs dans lesquels lesdites bandes à fonction d'ouverture/fermeture sont disposées parallèlement à la direction de défilement du film ou en oblique par rapport à cette direction.However, as will be explained below, the present invention is not limited to this specific application. The invention can also be applied to devices in which said strips with an opening / closing function are arranged parallel to the direction of travel of the film or at an angle to this direction.
On connaît de nombreux dispositifs de ce genre.Many devices of this kind are known.
La bande à fonction d'ouverture/fermeture peut prendre de nombreuses formes. A titre d'exemple, la bande à fonction d'ouverture/fermeture peut être formée de profilés de fermeture complémentaires, par exemple des profilés mâle/femelle, ou à crochets complémentaires, disposés sur des faces opposées du film.The opening / closing strip can take many forms. By way of example, the strip with an opening / closing function can be formed of complementary closing profiles, for example male / female profiles, or with complementary hooks, arranged on opposite faces of the film.
La bande à fonction d'ouverture/fermeture peut également être formée d'un profilé ou d'une bande d'arrachage/découpe, d'une bande adhésive, pelable ou non, ou encore d'une bande métallique de fermeture par pliage, etc ...The strip with an opening / closing function can also be formed from a profile or a tear-out / cutting strip, from an adhesive strip, peelable or not, or also from a metal strip for closing by folding, etc ...
On connaît de tels dispositifs de fabrication de sachets d'emballage à défilement horizontal ou vertical. En particulier, on connaît des machines dites FFS pour l'expression anglaise "Form, Fill and Seal", c'est-à-dire une machine conçue pour la formation de sachets, le remplissage puis leur fermeture en automatique.Such devices for manufacturing packaging bags with horizontal or vertical scrolling are known. In particular, machines known as FFS are known for the English expression "Form, Fill and Seal", that is to say a machine designed for forming bags, filling and then closing them automatically.
On connaît notamment des machines FFS comprenant : - des moyens d'acheminement d'un film à l'état plan,FFS machines are known in particular comprising: means of conveying a film in the planar state,
- des moyens de conformation du film à l'état tubulaire, sur un col de formage,means for shaping the film in a tubular state, on a forming neck,
- des moyens de fermeture longitudinale du tube ainsi formé, généralement par soudure thermique,means for longitudinally closing the tube thus formed, generally by thermal welding,
- une goulotte qui débouche dans le tube ainsi formé pour l'acheminement du produit à emballer, et- a chute which opens into the tube thus formed for conveying the product to be packaged, and
- des moyens de fixation transversale du film tubulaire, généralement là encore par soudure thermique. Plus précisément encore, ces derniers moyens sont généralement conçus pour assurer quasi-simultanément une soudure constituant par exemple le fond d'un sachet amont dans le sens du défilement, une seconde soudure au niveau de l'embouchure d'un sachet aval, et un sectionnement de film tubulaire pour isoler le sachet aval terminé du sachet amont en cours de préparation.- Means for transverse fixing of the tubular film, again generally by thermal welding. More precisely still, these latter means are generally designed to ensure almost simultaneously a weld constituting for example the bottom of an upstream bag in the direction of travel, a second weld at the mouth of a downstream bag, and a sectioning of tubular film to isolate the finished downstream bag from the upstream bag during preparation.
On connaît notamment de nos jours des machines comprenant un poste conçu pour la fixation de la bande à fonction d'ouverture/fermeture, sur le film, en amont du col de formage, transversalement par rapport à la direction de déplacement du film. En variante cependant, la bande de fermeture peut être déposée longitudinalement, c'est-à-dire parallèlement à la direction de déplacement du film, ou en oblique par rapport à cette direction.In particular, machines are known today comprising a station designed for fixing the strip with an opening / closing function, on the film, upstream of the forming neck, transversely with respect to the direction of movement of the film. As a variant, however, the closure strip can be deposited longitudinally, that is to say parallel to the direction of movement of the film, or obliquely with respect to this direction.
Les machines ainsi connues ont déjà rendu de grands services. Cependant, elles ne donnent pas toujours totalement satisfaction en ce sens qu'il est parfois difficile de contrôler avec précision le positionnement correct de la bande à fonction d'ouverture/fermeture.The machines thus known have already rendered great services. However, they are not always entirely satisfactory in the sense that it is sometimes difficult to precisely control the correct positioning of the strip with an open / close function.
Ce problème est particulièrement accru sur les machines à fonctionnement continu avec vitesse de défilement très élevée du film.This problem is particularly increased on machines operating continuously with very high film speed.
La présente invention a maintenant pour but de perfectionner les dispositifs de fabrication de sachets d'emballage connus en permettant une détection fiable du positionnement de la bande à fonction d'ouverture/fermeture. Ce but est atteint dans le cadre de la présente invention, grâce à un dispositif de formation de sachets comprenant au moins un capteur apte à détecter la présence d'une bande à fonction d'ouverture/fermeture, dans une position relative prédéterminée par rapport aux moyens de traitement cyclique du film pour la formation du sachet, notamment par rapport aux moyens de fixation transversale du film composant le sachet, prévues sur le dispositif.The present invention now aims to improve the known packaging bag manufacturing devices by allowing reliable detection of the positioning of the strip with opening / closing function. This object is achieved in the context of the present invention, thanks to a bag-forming device comprising at least one sensor capable of detecting the presence of a strip with an open / close function, in a predetermined relative position relative to the cyclic film processing means for the formation of the sachet, in particular with respect to the transverse fixing means of the film making up the sachet, provided on the device.
Selon une autre caractéristique avantageuse de la présente invention, le capteur est constitué d'un palpeur mécanique. La présente invention concerne également un procédé de formation de sachets.According to another advantageous characteristic of the present invention, the sensor consists of a mechanical probe. The present invention also relates to a method for forming sachets.
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et en regard des dessins annexés, donnés à titre d'exemples non limitatifs et sur lesquels :Other characteristics, aims and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings, given by way of nonlimiting examples and in which:
- la figure 1 représente une vue schématique d'un dispositif de formation de sachets d'emballage conforme à la présente invention,FIG. 1 represents a schematic view of a device for forming packaging bags in accordance with the present invention,
- les figures 2 et 3 représentent des vues à échelle agrandie d'un capteur conforme à la présente invention, respectivement dans le cas d'une détection de positionnement correcte d'une bande et dans le cas d'une détection de position incorrecte de celle-ci,- Figures 2 and 3 show views on an enlarged scale of a sensor according to the present invention, respectively in the case of a detection of correct positioning of a strip and in the case of an incorrect position detection of that -this,
- la figure 4 représente une vue latérale partielle du dispositif illustrant la localisation du capteur, etFIG. 4 represents a partial side view of the device illustrating the location of the sensor, and
- les figures 5, 6, 7 et 8 représentent deux vues similaires aux figures 2 et 3, dans le cas d'un capteur double et respectivement dans l'hypothèse d'une détection de positionnement correcte pour la figure 5 et de positionnement incorrecte pour les figures 6, 7 et 8 de la bande en question.- Figures 5, 6, 7 and 8 show two views similar to Figures 2 and 3, in the case of a double sensor and respectively on the assumption of correct positioning detection for Figure 5 and incorrect positioning for Figures 6, 7 and 8 of the strip in question.
La description qui va suivre va porter essentiellement sur un dispositif dans lequel la bande de fermeture/ouverture est disposée transversalement à la direction de déplacement du film. Cependant, l'invention n'est pas limitée à cette disposition. En effet, l'invention s'applique également à des dispositifs dans lesquels la bande de fermeture/ouverture est placée parallèlement ou en oblique par rapport à la direction de déplacement du film.The description which follows will relate essentially to a device in which the closure / opening strip is arranged transversely to the direction of movement of the film. However, the invention is not limited to this provision. The invention also applies to devices in which the strip of closing / opening is placed parallel or oblique to the direction of movement of the film.
On a illustré sur la figure 1 , un dispositif de formation de sachets d'emballage auquel s'applique particulièrement, mais non limitativement, l'invention. Il s'agit en l'espèce d'une machine de type FFS à défilement vertical.Is illustrated in Figure 1, a device for forming packaging bags to which particularly applies, but is not limited to, the invention. This is a FFS type machine with vertical scrolling.
On aperçoit sur cette figure 1 , un rouleau 10 à partir duquel est dévidé un film plan 12.We see in this figure 1, a roller 10 from which is unwound a flat film 12.
Le film 12 est guidé à l'aide de différents galets ou moyens équivalents qui ne seront pas décrits dans le détail par la suite, dans la mesure où ils peuvent faire l'objet de nombreuses variantes de réalisation.The film 12 is guided using different rollers or equivalent means which will not be described in detail below, insofar as they can be the subject of numerous variant embodiments.
De préférence dans le cadre de l'invention, le dispositif comprend en aval du rouleau 10 un poste 14 au niveau duquel une bande à fonction d'ouverture/fermeture est déposée sur le film 12 transversalement à la direction de déplacement de ce film.Preferably in the context of the invention, the device comprises downstream of the roller 10 a station 14 at which a strip with an opening / closing function is deposited on the film 12 transversely to the direction of movement of this film.
Le film 12 atteint ensuite un col de formage 16. Celui-ci est conformé de sorte qu'à la sortie du col de formage 16, le film 12 se présente à l'état tubulaire. Une goulotte de remplissage 18 superposée au col de formage 16 débouche dans le tube ainsi formé. De façon classique en soi, la goulotte de remplissage 18 est utilisée pour introduire le produit à emballer dans les ébauches de sachets formées par le film tubulaire précité.The film 12 then reaches a forming neck 16. The latter is shaped so that at the exit from the forming neck 16, the film 12 is in the tubular state. A filling chute 18 superimposed on the forming neck 16 opens into the tube thus formed. Conventionally in itself, the filling chute 18 is used to introduce the product to be packaged into the blanks of sachets formed by the above-mentioned tubular film.
Des moyens schématisés sur la figure 1 sous la référence 20, sont conçus pour assurer la fermeture longitudinale du film tubulaire, par exemple par soudure thermique. En aval de ce poste 20, on trouve un ensemble 30 conçu pour assurer :Means shown diagrammatically in FIG. 1 under the reference 20, are designed to ensure the longitudinal closing of the tubular film, for example by thermal welding. Downstream of this station 20, there is an assembly 30 designed to ensure:
- à l'aide de moyens 32, une soudure transversale sur une ébauche de sachet amont, correspondant au fond de ce dernier,- using means 32, a transverse weld on an upstream bag blank, corresponding to the bottom of the latter,
- à l'aide de moyens 34, une soudure transversale de finition d'un sachet aval, au niveau de l'embouchure de celui-ci,using means 34, a transverse weld finishing of a downstream bag, at the mouth of the latter,
- à l'aide de moyens de sectionnement 36, intercalés entre les moyens 32 et 34 précités, un sectionnement du film pour séparer le sachet aval terminé de l'ébauche de sachet amont, et - éventuellement à l'aide de moyens 38, la finition de la fixation de la bande à fonction d'ouverture/fermeture sur la paroi du film.with the aid of sectioning means 36, inserted between the aforementioned means 32 and 34, a sectioning of the film to separate the finished downstream bag from the upstream bag blank, and - Optionally using means 38, the finishing of the fixing of the strip with opening / closing function on the wall of the film.
Le cas échéant, en effet, la bande à fonction d'ouverture/fermeture peut être fixée, au niveau du poste 14, seulement sur la moitié de la largeur du film, la fixation sur l'autre moitié de la largeur du film étant réalisée en aval du col de formage 16, à l'aide des moyens 38 précités.If necessary, in fact, the strip with opening / closing function can be fixed, at the level of the station 14, only over half the width of the film, the fixing on the other half of the width of the film being carried out. downstream of the forming neck 16, using the aforementioned means 38.
La machine illustrée sur la figure 1 est une machine à défilement vertical.The machine illustrated in FIG. 1 is a vertical scrolling machine.
La présente invention s'applique également aux machines à défilement horizontal.The present invention also applies to machines with horizontal scrolling.
Par ailleurs, la présente invention peut également trouver application dans les dispositifs de formation de sachets utilisant un film 12 prémuni des bandes à fonction d'ouverture/fermeture transversale au niveau de la bobine 10. De même, l'invention s'applique à des dispositifs de formation de sachets dans lesquels la bande à fonction d'ouverture fermeture est rapportée sur le film 12 en un lieu différent de celui illustré sur la figure 1 , par exemple au niveau du col de formage 16 ou en aval de celui-ci.Furthermore, the present invention can also find application in bag-forming devices using a film 12 pre-provided with strips with a transverse opening / closing function at the level of the reel 10. Likewise, the invention applies to pouch forming devices in which the strip with closing opening function is attached to the film 12 at a location different from that illustrated in FIG. 1, for example at the level of the forming neck 16 or downstream thereof.
Comme on l'a indiqué précédemment, la présente invention s'applique à tout type de bande à fonction d'ouverture/fermeture de sachets, notamment les bandes comprenant des profilés de fermeture complémentaires, tels que mâle/femelle ou à crochets complémentaires, les bandes d'arrachage/découpe, les bandes adhésives, pelables ou non, les bandes métalliques de fermeture par pliage, etc.. La bande à fonction d'ouverture/fermeture porte la référence générale 60.As indicated above, the present invention applies to any type of band with the function of opening / closing of sachets, in particular the bands comprising complementary closure profiles, such as male / female or with complementary hooks, tear / cut tapes, adhesive tapes, peelable or not, metal strips for closing by folding, etc. The strip with opening / closing function has the general reference 60.
De même, la présente invention s'applique à tout type de film 12, tel que par exemple les films plastiques, simples ou composites, les films métallisés, etc ... Comme on l'a indiqué précédemment, dans le cadre de la présente invention, il est prévu au moins un capteur adapté pour détecter la présence de la bande dans une position relative prédéterminée attendue, par rapport à des moyens de traitement cyclique du film. De préférence, le capteur 100 est constitué d'un palpeur mécanique comprenant un poussoir 102 sollicité vers le film 12, lequel est pris en sandwich entre le palpeur ou poussoir 102 et une butée 110 formant enclume. Le poussoir 102 est associé à un contacteur électrique 104 sensible à la position du poussoir 102, c'est-à-dire fermé ou ouvert, selon que la bande de fermeture/ouverture 60 est présente ou non et forme ou non une surépaisseur entre la butée 110 et le poussoir 102.Similarly, the present invention applies to any type of film 12, such as for example plastic films, simple or composite, metallized films, etc. As indicated above, in the context of the present invention, there is provided at least one sensor adapted to detect the presence of the strip in an expected predetermined relative position, relative to cyclic film processing means. Preferably, the sensor 100 consists of a mechanical feeler comprising a pusher 102 biased towards the film 12, which is sandwiched between the feeler or pusher 102 and a stop 110 forming an anvil. The pusher 102 is associated with an electrical contactor 104 sensitive to the position of the pusher 102, that is to say closed or open, depending on whether the closing / opening strip 60 is present or not and whether or not forms an additional thickness between the stop 110 and pusher 102.
De préférence, dans le cadre de la présente invention, le capteur 100 est placé en aval des mâchoires 100 assurant la soudure transversale du film.Preferably, in the context of the present invention, the sensor 100 is placed downstream of the jaws 100 ensuring the transverse welding of the film.
Plus précisément encore, de préférence, le capteur 100 et l'enclume 110 sont portés par l'équipage support des mâchoires 30 de sorte que l'enclume 110 et le capteur 100 soient cycliquement éloignés et rapprochés du film 12 en synchronisme avec les mâchoires de soudure 30 pour ne pas perturber le défilement du film 12.More precisely still, preferably, the sensor 100 and the anvil 110 are carried by the jaw support unit 30 so that the anvil 110 and the sensor 100 are cyclically distant and brought closer to the film 12 in synchronism with the jaws of welding 30 so as not to disturb the movement of the film 12.
Plus précisément encore, comme on l'a schématisé sur la figure 4, de préférence, le capteur 100 est localisé au niveau du bord longitudinal du sachet opposé à celui par lequel est acheminé la bande à fonction d'ouverture/fermeture 60. Sur la figure 4, on a schématisé sous la flèche référencée A l'acheminement de cette bande 60.More precisely still, as shown diagrammatically in FIG. 4, preferably, the sensor 100 is located at the longitudinal edge of the sachet opposite to that by which the strip with opening / closing function 60 is conveyed. FIG. 4 shows diagrammatically under the arrow referenced A the routing of this strip 60.
L'homme de l'art comprendra que le capteur 100 conforme à la présente invention permet de détecter à la fois : - la présence de la bande 60 à fonction d'ouverture/fermeture, - l'acheminement correct dans le sens transversal, de la bande 60, c'est-à- dire la vérification de la couverture du film par la bande 60 (en cas de défaut, la bande 60 ne couvrant pas la totalité de l'embouchure du sachet, on peut s'attendre à un défaut de fermeture ultérieur, voire même un défaut d'étanchéité), et - le positionnement correct de la bande 60 dans le sens longitudinal par rapport à la direction de défilement du film (un défaut de positionnement dans ce sens conduirait à un défaut de positionnement de la bande à fonction d'ouverture/fermeture par rapport à l'embouchure du sachet). On a ainsi illustré sur la figure 2, le cas d'un positionnement correct de la bande 60 par rapport aux mâchoires de soudure 30. On a par contre illustré sur la figure 3, le cas d'une détection de position incorrecte de la bande 60 (dans ce cas, la bande 60 est située trop en avant par rapport au défilement du film).Those skilled in the art will understand that the sensor 100 according to the present invention makes it possible to detect both: - the presence of the strip 60 with an open / close function, - the correct routing in the transverse direction, of the strip 60, that is to say the verification of the coverage of the film by the strip 60 (in the event of a defect, the strip 60 does not cover the entire mouth of the sachet, we can expect a failure to subsequently close, or even a leak), and - the correct positioning of the strip 60 in the longitudinal direction relative to the direction of travel of the film (a positioning fault in this direction would lead to a positioning fault of the strip with opening / closing function relative to the mouth of the bag). FIG. 2 thus illustrates the case of correct positioning of the strip 60 relative to the welding jaws 30. On the other hand, FIG. 3 illustrates the case of detection of incorrect position of the strip. 60 (in this case, the strip 60 is situated too far in front of the running of the film).
Lorsqu'un problème est ainsi détecté et signalé par le capteur 100, il est possible d'intervenir pour repositionner correctement le film. La présente invention permet ainsi de supprimer des dérives dues notamment à l'élasticité intrinsèque du film 12, voir à des déformations de celui-ci en raison de sa qualité, ou encore, selon le type de produits conditionnés ou la façon dont le produit est déversé dans les sachets par la goulotte 18.When a problem is thus detected and reported by the sensor 100, it is possible to intervene to correctly reposition the film. The present invention thus makes it possible to eliminate drifts due in particular to the intrinsic elasticity of the film 12, to see deformations of the latter due to its quality, or even, depending on the type of products packaged or the way in which the product is poured into the sachets through the chute 18.
Le cas échéant, comme on l'a illustré sur les figures 5 à 8, on peut utiliser dans le cadre de la présente invention un double palpeur 100a, 100b, juxtaposé selon la direction de défilement du film. Comme on le comprend à l'examen notamment des figures 6 et 7, un tel double palpeur permet d'améliorer la détection de positionnement puisqu'il permet de déceler un simple décalage par rapport à la position attendue.Where appropriate, as illustrated in Figures 5 to 8, one can use in the context of the present invention a double probe 100a, 100b, juxtaposed in the direction of travel of the film. As will be understood from the examination in particular of FIGS. 6 and 7, such a double feeler makes it possible to improve the detection of positioning since it makes it possible to detect a simple offset with respect to the expected position.
Selon une autre caractéristique avantageuse de l'invention, on peut prévoir deux capteurs 100 disposés respectivement au niveau des deux bords longitudinaux opposés du film 12 afin de détecter un défaut de positionnement de la bande 60, sous forme d'une inclinaison par rapport à une direction parfaitement transversale à la direction de défilement du film.According to another advantageous characteristic of the invention, it is possible to provide two sensors 100 disposed respectively at the level of the two opposite longitudinal edges of the film 12 in order to detect a positioning defect of the strip 60, in the form of an inclination relative to a direction perfectly transverse to the direction of travel of the film.
Par ailleurs, comme on l'a indiqué précédemment, la présente invention s'applique également à des dispositifs dans lesquels la bande d'ouverture/fermeture est disposée non pas transversalement, mais longitudinalement c'est-à-dire parallèlement à la direction de déplacement du film ou encore en oblique par rapport à cette direction (il suffit pour cela d'adapter la position des capteurs). Dans ce dernier cas, on peut prévoir au moins deux capteurs respectivement à proximité de chaque bord du sachet, selon une génératrice oblique par rapport à la direction de déplacement du film, correspondant à la position oblique attendue de la bande. Bien entendu la présente invention n'est pas limitée aux modes de réalisation particuliers qui viennent d'être décrits, mais s'étend à toutes variantes conformes à son esprit. Furthermore, as indicated above, the present invention also applies to devices in which the opening / closing strip is arranged not transversely, but longitudinally, that is to say parallel to the direction of displacement of the film or even obliquely with respect to this direction (it suffices to adapt the position of the sensors). In the latter case, at least two sensors can be provided respectively near each edge of the bag, according to an oblique generatrix with respect to the direction of movement of the film, corresponding to the expected oblique position of the strip. Of course the present invention is not limited to the particular embodiments which have just been described, but extends to all variants in accordance with its spirit.

Claims

REVENDICATIONS
1. Dispositif de formation de sachets à l'aide d'un film à défilement continu équipé d'au moins une bande (60) à fonction d'ouverture/fermeture disposée sur le film (12), caractérisé par le fait qu'il comprend au moins un capteur (100) apte à détecter la présence de la bande (60) à fonction d'ouverture/fermeture dans une position relative prédéterminée par rapport aux moyens (30) de traitement cyclique du film pour la formation du sachet, notamment par rapport aux moyens (30) de fixation transversale du film composant le sachet, prévus sur le dispositif.1. Device for forming sachets using a film with continuous movement equipped with at least one strip (60) with an opening / closing function disposed on the film (12), characterized in that it comprises at least one sensor (100) capable of detecting the presence of the strip (60) with an opening / closing function in a predetermined relative position relative to the means (30) of cyclic film processing for the formation of the sachet, in particular relative to the means (30) for transversely fixing the film making up the bag, provided on the device.
2. Dispositif selon la revendication 1 , caractérisé par le fait que le capteur est formé d'un palpeur mécanique.2. Device according to claim 1, characterized in that the sensor is formed by a mechanical probe.
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé par le fait que le capteur (100) est disposé après un ensemble de mâchoires de soudure transverses (30) par rapport à la direction de déplacement du film (12).3. Device according to one of claims 1 or 2, characterized in that the sensor (100) is arranged after a set of transverse welding jaws (30) relative to the direction of movement of the film (12).
4. Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que le capteur (100) est solidaire d'un équipage portant les mâchoires de soudure transverses (30) afin de déplacer cycliquement le capteur (100) en rapprochement et en éloignement du film (12).4. Device according to one of claims 1 to 3, characterized in that the sensor (100) is integral with a team carrying the transverse welding jaws (30) in order to cyclically move the sensor (100) in approach and away from the film (12).
5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que le capteur (100) est formé d'un palpeur mécanique comprenant un poussoir (102) associé à un contacteur électrique (104). 5. Device according to one of claims 1 to 4, characterized in that the sensor (100) is formed by a mechanical probe comprising a pusher (102) associated with an electrical contactor (104).
6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait qu'il comprend des moyens (16) à conformer le film à l'état tubulaire, des moyens (18) aptes à remplir l'ébauche tubulaire ainsi formée et des moyens (30) aptes à fermer le sachet sur le produit emballé.6. Device according to one of claims 1 to 5, characterized in that it comprises means (16) for shaping the film in the tubular state, means (18) capable of filling the tubular blank thus formed and means (30) capable of closing the sachet on the packaged product.
7. Dispositif selon l'une des revendications 1 à 6, caractérisé par le fait qu'il comprend des moyens (14) aptes à fixer la bande (60) sur le film (12). 7. Device according to one of claims 1 to 6, characterized in that it comprises means (14) capable of fixing the strip (60) on the film (12).
8. Dispositif selon l'une des revendications 1 à 6, caractérisé par le fait qu'il utilise un film (12) prémuni de la bande (60) à fonction d'ouverture/fermeture.8. Device according to one of claims 1 to 6, characterized in that it uses a film (12) pre-tape (60) with opening / closing function.
9. Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait qu'il comprend des moyens assurant un défilement vertical du film (12).9. Device according to one of claims 1 to 8, characterized in that it comprises means ensuring vertical scrolling of the film (12).
10. Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait qu'il comprend des moyens assurant un défilement horizontal du film (12).10. Device according to one of claims 1 to 8, characterized in that it comprises means ensuring a horizontal movement of the film (12).
11. Dispositif selon l'une des revendications 1 à 10, caractérisé par le fait que la bande (60) à fonction d'ouverture/fermeture et choisie dans le groupe comprenant des profilés de fermeture complémentaires, par exemple mâle/femelle ou à crochets complémentaires, les bandes d'arrachage/découpe, les bandes adhésives, pelables ou non et les bandes métalliques de fermeture par pliage. 11. Device according to one of claims 1 to 10, characterized in that the strip (60) with opening / closing function and chosen from the group comprising complementary closing profiles, for example male / female or with hooks additional, tear / cut tapes, adhesive tapes, peelable or not, and metallic fold closure tapes.
12. Dispositif selon l'une des revendications 1 à 11 , caractérisé par le fait que le capteur (100) est localisé le long d'un bord longitudinal du sachet opposé à celui par lequel est acheminé la bande (60).12. Device according to one of claims 1 to 11, characterized in that the sensor (100) is located along a longitudinal edge of the bag opposite to that by which the strip (60) is routed.
13. Dispositif selon l'une des revendications 1 à 12, caractérisé par le fait que le capteur (100) est adapté pour détecter la présence d'une bande (60), l'acheminement correct de la bande (60) dans la direction transversale au défilement du film, et le positionnement correct de la bande dans le sens longitudinal du film (12).13. Device according to one of claims 1 to 12, characterized in that the sensor (100) is adapted to detect the presence of a strip (60), the correct routing of the strip (60) in the direction transverse to the running of the film, and the correct positioning of the strip in the longitudinal direction of the film (12).
14. Dispositif selon l'une des revendications 1 à 13, caractérisé par le fait que chaque capteur comprend un double palpeur (100a, 100b) juxtaposés selon la direction longitudinale de défilement du film (12).14. Device according to one of claims 1 to 13, characterized in that each sensor comprises a double feeler (100a, 100b) juxtaposed in the longitudinal direction of travel of the film (12).
15. Dispositif selon l'une des revendications 1 à 14, caractérisé par le fait que la bande (60) est disposée transversalement à la direction de déplacement du film (12).15. Device according to one of claims 1 to 14, characterized in that the strip (60) is arranged transversely to the direction of movement of the film (12).
16. Dispositif selon l'une des revendications 1 à 14, caractérisé par le fait que la bande (60) est disposée parallèlement à la direction de déplacement du film (12). 16. Device according to one of claims 1 to 14, characterized in that the strip (60) is arranged parallel to the direction of movement of the film (12).
17. Dispositif selon l'une des revendications 1 à 14, caractérisé par le fait que la bande (60) est disposée en oblique par rapport à la direction de déplacement du film (12).17. Device according to one of claims 1 to 14, characterized in that the strip (60) is arranged obliquely relative to the direction of movement of the film (12).
18. Dispositif selon la revendication 17, caractérisé par le fait qu'il comprend deux capteurs (100) disposés respectivement à proximité de chaque bord du sachet, selon une génératrice oblique par rapport à la direction de déplacement du film, correspondant à la position oblique attendue de la bande.18. Device according to claim 17, characterized in that it comprises two sensors (100) disposed respectively near each edge of the sachet, according to an oblique generator with respect to the direction of movement of the film, corresponding to the oblique position expected from the band.
19. Procédé de formation de sachets d'emballage à l'aide d'un film à défilement continu équipé d'au moins une bande (60) à fonction d'ouverture/fermeture disposée sur le film, caractérisé par le fait qu'il comprend l'étape consistant à détecter la présence de la bande (60) à fonction d'ouverture/fermeture, à l'aide d'au moins un capteur (100) dans une position relative prédéterminée par rapport aux moyens de traitement cycliques (30) du film pour la formation du sachet, notamment par rapport à des moyens (30) de fixation transversale du film composant le sachet, prévus sur le dispositif de formation.19. Method for forming packaging sachets using a continuous running film equipped with at least one strip (60) with an opening / closing function arranged on the film, characterized in that it comprises the step of detecting the presence of the strip (60) with opening / closing function, using at least one sensor (100) in a predetermined relative position relative to the cyclic processing means (30 ) of the film for the formation of the sachet, in particular with respect to means (30) for transversely fixing the film making up the sachet, provided on the forming device.
20. Procédé selon la revendication 19, caractérisé par le fait que le capteur (100) est formé d'un palpeur mécanique disposé sur le bord longitudinal du film opposé à celui par lequel est acheminée la bande (60). 20. The method of claim 19, characterized in that the sensor (100) is formed of a mechanical feeler disposed on the longitudinal edge of the film opposite to that by which the strip (60) is routed.
EP00949619A 1999-07-05 2000-07-04 Device and method for making packaging bags Expired - Lifetime EP1107863B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9908625A FR2795999B1 (en) 1999-07-05 1999-07-05 DEVICE AND METHOD FOR MANUFACTURING PACKAGING BAGS
FR9908625 1999-07-05
PCT/FR2000/001903 WO2001002162A1 (en) 1999-07-05 2000-07-04 Device and method for making packaging bags

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EP1107863B1 EP1107863B1 (en) 2003-09-17

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JP (1) JP2003503244A (en)
CN (1) CN1316950A (en)
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CA (1) CA2341604A1 (en)
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FR (1) FR2795999B1 (en)
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DE60005281T2 (en) 2004-07-15
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CN1316950A (en) 2001-10-10
NZ510341A (en) 2003-07-25
FR2795999B1 (en) 2001-09-28
US6886310B1 (en) 2005-05-03
CA2341604A1 (en) 2001-01-11
BR0006893A (en) 2001-06-12
IL141808A0 (en) 2002-03-10
JP2003503244A (en) 2003-01-28
WO2001002162A1 (en) 2001-01-11
FR2795999A1 (en) 2001-01-12
EP1107863B1 (en) 2003-09-17
AU6291800A (en) 2001-01-22
ATE249920T1 (en) 2003-10-15

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