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WO2002038446A1 - Method for closing an open-mouth bag filled with a powdery material and installation for implementing said method - Google Patents

Method for closing an open-mouth bag filled with a powdery material and installation for implementing said method Download PDF

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Publication number
WO2002038446A1
WO2002038446A1 PCT/FR2001/003556 FR0103556W WO0238446A1 WO 2002038446 A1 WO2002038446 A1 WO 2002038446A1 FR 0103556 W FR0103556 W FR 0103556W WO 0238446 A1 WO0238446 A1 WO 0238446A1
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WO
WIPO (PCT)
Prior art keywords
bag
adhesive strip
mouth
sides
installation
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.)
Ceased
Application number
PCT/FR2001/003556
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French (fr)
Inventor
Pierre Cospain
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.)
CIF
Original Assignee
CIF
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Filing date
Publication date
Application filed by CIF filed Critical CIF
Priority to AU2002223065A priority Critical patent/AU2002223065A1/en
Publication of WO2002038446A1 publication Critical patent/WO2002038446A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/06—Applying adhesive tape
    • B65B51/062—Applying adhesive tape to the mouths of bags

Definitions

  • the invention relates to the field of packaging.
  • the invention relates to the field of bags that can contain any type of material, and very commonly used in any type of industry, having an open mouth to be closed after filling the bag.
  • open mouth bag are generally made of paper or any other equivalent material, in particular plastic, and have a substantially rectangular shape before closing.
  • these bags When in use, these bags are first filled with the desired product and then closed by bringing the lips of their mouths edge to edge, then by joining these lips by different methods which may include bonding and / or sewing steps. Methods involving sewing the mouth of the bag include those that allow the bag to be opened quickly. They are widely used.
  • bags are used closed before filling and pre-equipped with a valve by which the pulverulent material can be introduced.
  • the objective of the present invention is to propose a new method of closing a bag with an open mouth making it possible to obtain closed bags which do not have the drawbacks of the state of the art.
  • an objective of the present invention is to propose such a method which makes it possible to obtain a filled rectangular bag, therefore easier to palletize and to store and the product of which it contains can be easily identified.
  • Another objective of the present invention is also to propose an installation for the implementation of such a method.
  • an objective of the present invention is to propose such an installation which does not necessarily imply the use of glue and size.
  • affixing closure means including an adhesive strip on said folded sides; - stop pinching the upper part of the bag.
  • the closure of the bag makes it possible to obtain a closed essentially rectangular bag which can be easily stored and palletized.
  • the adhesive tape used will generally act as a label which will identify the contents of the bag on the side of the closure.
  • the method according to the invention comprises a prior step consisting in leveling the mouth of the bag horizontally.
  • the aim of such a prior step is to determine a reference line for the subsequent steps of the process.
  • Such a reference line makes it possible to guarantee greater reproducibility of the stages thereof.
  • the method according to the invention also comprises a prior step consisting in making at least two vertical cuts on the sides of the mouth of the bag. Such cuts will facilitate the subsequent steps of spreading the sides of the closed area and the flattening thereof. As a general rule, these notches will be approximately the height of 1 closure zone.
  • the method according to the invention is characterized in that it also comprises a step consisting in compressing said adhesive strip after it has been deposited on the bag or when it is deposited on the bag.
  • the object of such compression is to ensure better cohesion between the bag and the adhesive strip.
  • the adhesive strip used in the context of the present embodiment is a self-adhesive strip, that is to say a pre-pasted strip not implying prior gluing of the strip in the context of the method according to the invention.
  • a self-adhesive strip may be provided with a peelable protection which will be removed automatically just before laying on the bag.
  • the adhesive strip used will be of the type cooperating with at least one quick-opening wire, which may initially, for example, be provided between the adhesive strip and the peelable protection.
  • said adhesive strip is a pre-printed strip.
  • the method comprises a complementary step of printing said adhesive strip before or during or after it is bonded to the bag.
  • the method according to the invention comprises at least one additional step of cleaning the bag by brushing and suction.
  • said cleaning step is carried out between said step of folding the sidewalls one over the other and said step of fitting said adhesive strip.
  • the method described also comprises a step consisting in integrating a pouring spout into the bag.
  • the method comprises a step of sealing the opening of the bag concomitant with said pinching step.
  • This sealing may be carried out for example by providing an inner bag for the plastic bag such as polyethylene with a Z-fold allowing hot sealing on the nip. Such a sealing will allow perfect sealing of the bag.
  • the invention also relates to any installation for closing open mouth bags filled with pulverulent material or granules specially designed for the implementation of the method as described above, characterized in that it comprises: at least one device for drive having at least one rail for pinching the mouth of the bag so as to delimit a closure zone; means making it possible to separate the sides from the closure zone; means for flattening the sides of the closed area; means making it possible to fold the flanks of the closure zone one over the other; means for depositing on the folded sides at least one adhesive closure tape.
  • the installation according to the invention can be integrated into automatic or manual bag filling lines. It can be adapted to different bag sizes.
  • the means making it possible to separate the flanks from the closure zone include at least two suction cups or two suction ramps.
  • said means for folding the flanks of the closure zone one on the other include at least two static or mobile wallet guides.
  • the invention also includes at least one roller for compressing the adhesive strip on the bag.
  • it comprises means for cleaning the bag, advantageously constituted by a brushing and suction device.
  • the installation also comprises means for welding the lips of the mouth of the bag.
  • FIG. 1 represents a block diagram of a nonlimiting embodiment of the method according to the present invention according to which a bag is represented successively in the different stages of this method;
  • FIG. 2 represents a side view of the installation of an installation according to the invention;
  • FIG. 9 represents a self-adhesive strip which can be used in the context of the present invention, seen from above;
  • FIG. 10 represents a bag obtained by the closing method according to the present invention.
  • the different stages of the embodiment of the method according to the invention are represented from right to left, and designated by letters going from A to K.
  • FIG. 2 an installation integrating different stations repeating steps A to K is shown in longitudinal view
  • the method is used to close bags 1 with open mouth already filled with pulverulent material or granules, having a flat bottom and a shape before closing essentially parallelepipedic, after filling with any material.
  • These bags have a complex structure including a layer of paper and an inner polyethylene bag. They may have a different structure in other embodiments.
  • a drive device 2 pinching the upper part of the bag and driving it in the various steps of the method.
  • this drive device extends along the entire installation.
  • the coach comprises welding means (not shown in Figure 2) for welding the inner bag and thus sealing the contents of the bag.
  • the bag is then referenced during a second step B (also not shown in FIG. 2) then leveled horizontally during a step C using a knife 4.
  • the leveling step makes it possible to obtain a height reference for the rest of the process.
  • the tool used for this step is shown in more detail, in cross section, in Figure 3.
  • the bag 1 is shown in dotted lines.
  • the knife 4 is circular and rotated by a motor 4a.
  • step D folds are marked in the upper part of the bag 1 using tools 5a, 5b. These folds include a horizontal fold 7 and two vertically inclined folds 7a and 7b
  • the horizontal fold 7 formed here delimits the limit bottom of the bag closing area.
  • this step of marking folds is broken down into two sub-steps, namely a sub-step D1 during which the horizontal fold 7 is formed and a sub-step D2 during which the two inclined folds 7a and 7b are formed.
  • the horizontal fold is formed by a tool 5a shown in FIG. 2 and the vertically inclined folds 7a and 7b are formed by a tool 5b also shown in FIG. 2 and in more detail, in cross section, in FIG. 4.
  • the tool 5b integrates two rollers 5c and 5d mounted in antagonistic rotation and provided with a rib 5e making it possible to form the folds 7a and 7b. These rollers are driven by a 5f motor.
  • Two vertical notches are then made in the upper part of the bag 1 on each side of the latter during a step E. These two notches are made at a determined distance from the vertical edges of the bag 1.
  • This step is carried out using a tool shown in Figure 2 and, in more detail in cross section, in Figure 5. This tool integrates a knife 6 mus in rotation according to arrow 6a.
  • step F the flanks 8, 8a of the closure zone are separated as symbolized by the two small arrows by means of a set of suction cups 15 and laid flat.
  • the presence of the vertical notches made in the previous step E facilitates the step F.
  • this flattening step is carried out in two steps, namely a step FI during which the sides 8 and 8a of the zone closing the bag are discarded, and a step F2 during which these sides are laid flat.
  • the tool used for step FI is represented in FIG. 2 and, in more detail, in cross section, in FIG. 6. It includes suction cups 15 which make it possible to separate the sides ⁇ and 8a.
  • the tool used for step F2 is represented in FIG. 2 and, in more detail in side view, in FIG. 7.
  • step G these flanks are held flat using a tool incorporating a ski 9.
  • the tool used during this step is shown in FIG. 2 and, in more detail in lateral view in FIG. 8.
  • a longitudinal fold is made on the top of the bag using a roller 9a.
  • the sides 8 and 8a are then folded over one another during a step H by means of static wallet guides 13
  • stage I the upper part of the bag is cleaned using a brushing and suction device 10.
  • An adhesive strip constituted by a self-adhesive label li with a strong pre-printed adhesive power is then deposited on the folded sides of the closure zone to close the bag during step J.
  • the removal of this label is carried out in two sub-steps. steps J1 and J2 consisting respectively of depositing the label using an appropriate device as shown in FIG. 2 then pressing the label placed on the bag using a roller 12.
  • this adhesive strip has a wire 1 la for quick opening.
  • a compression member 14 is used to press the label 11 and secure the closure of the bag.
  • step K the pinching of the upper zone of the bag ceases and a closed bag 1 of parallelepiped shape is obtained as shown in FIG. 10 which is easier to store and to palletize.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The invention concerns a method for closing an open-mouth bag filled with a powdery or granular material and an installation for implementing said method. The invention concerns a method and an installation for closing open-mouth bags filled with powdery or granular material so as to obtain a substantially parallelepiped closed bag. The installation comprises: at least a driving device (2) having at least a slide (3) for squeezing the mouth of the bag so as to define a closure zone, means (15) for spacing apart the flanks of the closure zone; means (9) for laying flat the flanks of the closure zone; means (13) for folding on each other the flanks of the closure zone; and means (10) for setting on the folded flanks at least a sealing adhesive strip (11).

Description

Procédé de fermeture d'un sac à gueule ouverte rempli d'un matériau pulvérulent et installation pour la mise en œuvre d'un tel procédé. Method for closing an open mouth bag filled with a pulverulent material and installation for implementing such a method.

L'invention concerne le domaine de l'emballage.The invention relates to the field of packaging.

Plus précisément, l'invention concerne le domaine des sacs pouvant contenir tout type de matériau, et très couramment utilisés dans tout type d'industrie, présentant une gueule ouverte devant être fermée après remplissage du sac.More specifically, the invention relates to the field of bags that can contain any type of material, and very commonly used in any type of industry, having an open mouth to be closed after filling the bag.

Ces sacs de facture classique ci-après désignés par les termes « sac à gueule ouverte » sont généralement réalisés en papier ou en tout autre matériau équivalent, notamment plastique, et présentent une forme avant fermeture essentiellement parallélépipédique.These bags of conventional invoice hereinafter designated by the terms “open mouth bag” are generally made of paper or any other equivalent material, in particular plastic, and have a substantially rectangular shape before closing.

Lors de leur utilisation, ces sacs sont d'abord remplis avec le produit souhaité puis refermés en amenant les lèvres de leur gueule bord à bord, puis en solidarisant ces lèvres par différents procédés pouvant inclure des étapes de collage et/ou de couture. Les procédés impliquant une couture de la gueule du sac incluent ceux permettent une ouverture rapide de celui-ci. Ils sont abondamment utilisés.When in use, these bags are first filled with the desired product and then closed by bringing the lips of their mouths edge to edge, then by joining these lips by different methods which may include bonding and / or sewing steps. Methods involving sewing the mouth of the bag include those that allow the bag to be opened quickly. They are widely used.

Pour certains produits particuliers, tels que par exemple les produits pulvérulents ou en granulés, on utilise des sacs fermés avant remplissage et pré- équipés d'une valve par laquelle on peut introduire le matériau pulvérulent .For certain particular products, such as for example powdered or granular products, bags are used closed before filling and pre-equipped with a valve by which the pulverulent material can be introduced.

De tels sacs de l'art antérieur présentent l'inconvénient de montrer une forme après remplissage et fermeture qui n'est plus parallélépipédique. Leur stockage prend donc plus de place et leur palettisation est moins facile.Such bags of the prior art have the disadvantage of showing a shape after filling and closing which is no longer parallelepiped. Their storage therefore takes up more space and their palletization is less easy.

De plus, on notera que de tels sacs présentent un côté (le côté de la fermeture) ne présentant pas suffisamment de surface pour identifier facilement le produit de ce côté lorsqu'il est palettiséIn addition, it will be noted that such bags have a side (the side of the closure) that does not have enough surface to easily identify the product on this side when it is palletized.

Par ailleurs, les procédés de fermeture de ces sacs impliquent l'utilisation d'une encolleuse qui complique les chaînes de fabrication dans la mesure où les colles utilisées par de telles encolleuses impliquent des conditions de mise en œuvre parfois contraignantes.Furthermore, the methods of closing these bags involve the use of a gluing machine which complicates the production lines in so far as the adhesives used by such gluing machines imply sometimes restrictive processing conditions.

On notera enfin que les sacs disposant d'une valve, s'ils présentent certains intérêts liés à l'utilisation d'une valve, implique aussi, outre les inconvénients mentionnés ci-dessus, également celui d'entraîner une étanchéité qui peut être imparfaite.Finally, it should be noted that the bags having a valve, if they have certain advantages linked to the use of a valve, also imply, in addition to the drawbacks mentioned above, also that of causing a seal which may be imperfect. .

L'objectif de la présente invention est de proposer un nouveau procédé de fermeture de sac à gueule ouverte permettant d'obtenir des sacs fermés ne présentant pas les inconvénients de l'état de la technique. Notamment, un objectif de la présente invention est de proposer un tel procédé qui permette d'obtenir un sac rempli parallélépipédique, donc plus facile à palettiser et à stocker et dont le produit qu'il contient peut être facilement identifié.The objective of the present invention is to propose a new method of closing a bag with an open mouth making it possible to obtain closed bags which do not have the drawbacks of the state of the art. In particular, an objective of the present invention is to propose such a method which makes it possible to obtain a filled rectangular bag, therefore easier to palletize and to store and the product of which it contains can be easily identified.

Un autre objectif de la présente invention est également de proposer une installation pour la mise en œuvre d'un tel procédé.Another objective of the present invention is also to propose an installation for the implementation of such a method.

Notamment un objectif de la présente invention est de proposer une telle installation qui n'implique pas obligatoirement l'utilisation de colle et d'encolleuse.In particular, an objective of the present invention is to propose such an installation which does not necessarily imply the use of glue and size.

Ces différents objectifs sont atteints par l'invention qui concerne un procédé de fermeture d'un sac à gueule ouverte rempli de matériau pulvérulent ou de granulés caractérisant ce qui comprend les étapes consistant à :These various objectives are achieved by the invention which relates to a method for closing an open mouth bag filled with pulverulent material or granules, characterizing what comprises the steps consisting in:

-pincer la partie supérieure du sac pour joindre les deux lèvres de la gueule de celui - ci à une distance (d) du bord supérieur du sac pour ménager une zone de fermeture ; - écarter les flancs de la zone de fermeture ;- pinch the upper part of the bag to join the two lips of the mouth thereof at a distance (d) from the upper edge of the bag to provide a closed area; - move aside the sides of the closed area;

-mettre à plat ces flancs ; -replier les flancs l'un sur l'autre ;flatten these flanks; -fold the sides one over the other;

-apposer des moyens de fermeture incluant une bande adhésive sur lesdits flancs repliés; - cesser le pincement de la partie supérieure du sac.affixing closure means including an adhesive strip on said folded sides; - stop pinching the upper part of the bag.

Selon un tel procédé, la fermeture du sac permet d'obtenir un sac fermé essentiellement parallélépipédique pouvant être facilement stocké et palettisé.According to such a method, the closure of the bag makes it possible to obtain a closed essentially rectangular bag which can be easily stored and palletized.

La bande adhésive utilisée fera généralement office d'étiquette qui permettra d'identifier le contenu du sac sur le côté de la fermeture.The adhesive tape used will generally act as a label which will identify the contents of the bag on the side of the closure.

Préférentiellement, le procédé selon l'invention comprend une étape préalable consistant à araser horizontalement la gueule du sac. Une telle étape préalable a pour objectif de déterminer une ligne de référence pour les étapes ultérieures du procédé. Une telle ligne de référence permet de garantir une plus grande reproductibilité des étapes de celui-ci.Preferably, the method according to the invention comprises a prior step consisting in leveling the mouth of the bag horizontally. The aim of such a prior step is to determine a reference line for the subsequent steps of the process. Such a reference line makes it possible to guarantee greater reproducibility of the stages thereof.

Egalement préférentiellement le procédé selon l'invention comprend aussi une étape préalable consistant à effectuer au moins deux entailles verticales sur les cotés de la gueule du sac. De telles entailles permettront de faciliter les étapes ultérieures consistant à écarter les flancs de la zone de fermeture et la mise à plat de celle-ci. En règle générale, ces entailles présenteront à peu près la hauteur de 1 zone de fermeture.Also preferably, the method according to the invention also comprises a prior step consisting in making at least two vertical cuts on the sides of the mouth of the bag. Such cuts will facilitate the subsequent steps of spreading the sides of the closed area and the flattening thereof. As a general rule, these notches will be approximately the height of 1 closure zone.

Avantageusement, le procédé selon l'invention est caractérisé en ce qu'il comprend aussi une étape consistant à comprimer ladite bande adhésive après que celle-ci a été déposée sur le sac ou au moment où celle-ci est déposée sur le sac. Une telle compression a pour objet d'assurer une meilleure cohésion entre le sac et la bande adhésive.Advantageously, the method according to the invention is characterized in that it also comprises a step consisting in compressing said adhesive strip after it has been deposited on the bag or when it is deposited on the bag. The object of such compression is to ensure better cohesion between the bag and the adhesive strip.

Selon une variante préférentielle de l'invention, la bande adhésive utilisée dans le cadre du présent mode de réalisation est une bande auto-adhésive, c'est-à- dire une bande pré-encollée n'impliquant pas d'encollage préalable de la bande dans le cadre du procédé selon l'invention. Une telle bande auto-adhésive pourra être munie d'une protection pelable qui sera ôtée automatiquement juste avant la pose sur le sac. Avantageusement, la bande adhésive utilisée sera du type coopérant avec au moins un fil d'ouverture rapide, pouvant initialement par exemple être prévue entre la bande adhésive et la protection pelable.According to a preferred variant of the invention, the adhesive strip used in the context of the present embodiment is a self-adhesive strip, that is to say a pre-pasted strip not implying prior gluing of the strip in the context of the method according to the invention. Such a self-adhesive strip may be provided with a peelable protection which will be removed automatically just before laying on the bag. Advantageously, the adhesive strip used will be of the type cooperating with at least one quick-opening wire, which may initially, for example, be provided between the adhesive strip and the peelable protection.

Selon une variante du procédé selon l'invention, ladite bande adhésive est une bande pré-imprimée.According to a variant of the method according to the invention, said adhesive strip is a pre-printed strip.

Selon une autre variante, le procédé comprend une étape complémentaire d'impression de ladite bande adhésive avant ou pendant ou après son collage sur le sac.According to another variant, the method comprises a complementary step of printing said adhesive strip before or during or after it is bonded to the bag.

Avantageusement, le procédé selon l'invention comprend au moins une étape supplémentaire de nettoyage du sac par brossage et aspiration. Préférentiellement, ladite étape de nettoyage est effectuée entre ladite étape de repliage des flancs l'un sur l'autre et ladite étape de pose de ladite bande collante.Advantageously, the method according to the invention comprises at least one additional step of cleaning the bag by brushing and suction. Preferably, said cleaning step is carried out between said step of folding the sidewalls one over the other and said step of fitting said adhesive strip.

Selon une variante de l'invention, le procédé décrit comprend aussi une étape consistant à intégrer un bec verseur dans le sac. Préférentiellement, le procédé comprend une étape de scellage de l'ouverture du sac concomitante à ladite étape de pincement. Ce scellage pourra être effectué par exemple en prévoyant une sache intérieure au sac en matière plastique telle que du polyéthylène avec un pli en Z autorisant un scellage à chaud sur la ligne de pincement. Un tel scellage permettra d'obtenir une étanchéité parfaite du sac.According to a variant of the invention, the method described also comprises a step consisting in integrating a pouring spout into the bag. Preferably, the method comprises a step of sealing the opening of the bag concomitant with said pinching step. This sealing may be carried out for example by providing an inner bag for the plastic bag such as polyethylene with a Z-fold allowing hot sealing on the nip. Such a sealing will allow perfect sealing of the bag.

L'invention concerne également toute installation de fermeture de sacs à gueule ouverte remplis de matériau pulvérulent ou de granulés spécialement conçue pour la mise en œuvre du procédé tel que décrit ci-dessus caractérisée en ce qu'elle comprend : au moins un dispositif d'entraînement présentant au moins un rail permettant de pincer la gueule du sac de façon à délimiter une zone de fermeture; des moyens permettant d'écarter les flancs de la zone de fermeture; des moyens permettant de mettre à plat les flancs de la zone de fermeture ; des moyens permettant de replier l'un sur l'autre les flancs de la zone de fermeture; des moyens pour déposer sur les flancs repliés au moins une bande adhésive de fermeture. L'installation selon l'invention peut être intégrée dans des lignes automatiques ou manuelles de remplissage de sacs. Elle peut être adaptée à différents formats de sacs.The invention also relates to any installation for closing open mouth bags filled with pulverulent material or granules specially designed for the implementation of the method as described above, characterized in that it comprises: at least one device for drive having at least one rail for pinching the mouth of the bag so as to delimit a closure zone; means making it possible to separate the sides from the closure zone; means for flattening the sides of the closed area; means making it possible to fold the flanks of the closure zone one over the other; means for depositing on the folded sides at least one adhesive closure tape. The installation according to the invention can be integrated into automatic or manual bag filling lines. It can be adapted to different bag sizes.

Préférentiellement, les moyens permettant d'écarter les flancs de la zone de fermeture incluent au moins deux ventouses ou deux rampes d'aspiration. Egalement préférentiellement, lesdits moyens pour replier l'un sur l'autre les flancs de la zone de fermeture incluent au moins deux guides portefeuilles statiques ou mobiles.Preferably, the means making it possible to separate the flanks from the closure zone include at least two suction cups or two suction ramps. Also preferentially, said means for folding the flanks of the closure zone one on the other include at least two static or mobile wallet guides.

Avantageusement, l'invention inclut également au moins un rouleau de compression de la bande collante sur le sac. Préférentiellement, elle comprend des moyens de nettoyage du sac, avantageusement constitués par un dispositif de brossage et d'aspiration.Advantageously, the invention also includes at least one roller for compressing the adhesive strip on the bag. Preferably, it comprises means for cleaning the bag, advantageously constituted by a brushing and suction device.

Enfin, également préférentiellement, l'installation comprend également des moyens de soudure des lèvres de la gueule du sac.Finally, also preferably, the installation also comprises means for welding the lips of the mouth of the bag.

L'invention ainsi que les différents avantages qu'elle présente seront plus facilement compris grâce à la description qui va suivre d'un mode de réalisation de celle-ci donnée référence aux dessins dans lesquels :The invention as well as the various advantages which it presents will be more easily understood thanks to the following description of an embodiment of the latter given with reference to the drawings in which:

-la figure 1 représente un synoptique d'un mode non limitatif de réalisation du procédé selon la présente invention selon lequel un sac est représenté successivement dans les différentes étapes de ce procédé ; -la figure 2 représente une vue latérale d'implantation d'une installation selon l'invention ;FIG. 1 represents a block diagram of a nonlimiting embodiment of the method according to the present invention according to which a bag is represented successively in the different stages of this method; FIG. 2 represents a side view of the installation of an installation according to the invention;

- les figure 3 à 8 représente des vue de détails de différents éléments de l'installation représentée à la figure 2 ; -la figure 9 représente une bande auto-adhésive pouvant être utilisée dans le cadre de la présente invention, en vue de dessus ;- Figures 3 to 8 show detailed views of different elements of the installation shown in Figure 2; FIG. 9 represents a self-adhesive strip which can be used in the context of the present invention, seen from above;

-la figure lOreprésente un sac obtenu grâce au procédé de fermeture selon la présente invention. En référence à la figure 1, les différentes étapes du mode de réalisation du procédé selon l'invention sont représentées de droite à gauche, et désignées par des lettres allant de A à K. En référence à la figure 2, une installation intégrant différents postes reprenant les étapes A à K est représentée en vue longitudinaleFIG. 10 represents a bag obtained by the closing method according to the present invention. With reference to FIG. 1, the different stages of the embodiment of the method according to the invention are represented from right to left, and designated by letters going from A to K. With reference to FIG. 2, an installation integrating different stations repeating steps A to K is shown in longitudinal view

Dans le cadre de ce mode de réalisation, le procédé est utilisé pour fermer des sacs 1 à gueule ouverte déjà remplis de matériau pulvérulent ou de granulés, présentant un fond plat et une forme avant fermeture essentiellement parallélépipédique, après remplissage avec un matériau quelconque. Ces sacs présentent une structure complexe intégrant une couche de papier et une sache intérieure en polyéthylène. Ils pourront présenter une structure différente dans d'autres modes de réalisation.In the context of this embodiment, the method is used to close bags 1 with open mouth already filled with pulverulent material or granules, having a flat bottom and a shape before closing essentially parallelepipedic, after filling with any material. These bags have a complex structure including a layer of paper and an inner polyethylene bag. They may have a different structure in other embodiments.

Lors d'une première étape A du procédé, la gueule du sac est introduite dans le rail 3 d' un dispositif d'entraînement 2 pinçant la partie supérieure du sac et entraînant celui-ci dans les différentes étapes du procédé. Comme on peut le voir sur la figure 2, ce dispositif d'entraînement se prolonge le long de toute l'installation.During a first step A of the method, the mouth of the bag is introduced into the rail 3 of a drive device 2 pinching the upper part of the bag and driving it in the various steps of the method. As can be seen in Figure 2, this drive device extends along the entire installation.

Au niveau de l'étape A, l'entraîneur comprend des moyens de soudage (non représentés sur la figure 2) permettant de souder la sache intérieure et ainsi d'étanchéifier le contenu du sac.At step A, the coach comprises welding means (not shown in Figure 2) for welding the inner bag and thus sealing the contents of the bag.

Le sac est ensuite mis en référence lors d'une deuxième étape B (également non représenté sur la figure 2) puis arasé horizontalement lors d'une étape C grâce à un couteau 4. L'étape d'arasage permet d'obtenir une hauteur de référence pour la suite du procédé. L'outil utilisé pour cette étape est représenté plus en détail, en coupe transversale, à la figure 3. Sur cette figure 3, le sac 1 est représenté en ligne pointillée. Le couteau 4 est circulaire et mu en rotation grâce à un moteur 4a. Lors de l'étape D, des plis sont marqués dans la partie supérieure du sac 1 grâce à des outils 5a,5b.Ces plis comprennent un pli horizontal 7 et deux plis inclinés verticalement 7a et 7b Le pli horizontal 7 ici formé délimite la limite inférieure de la zone de fermeture du sac. En pratique, et selon la figure 2, cette étape de marquage de plis se décompose en deux sous-étapes, à savoir une sous- étape Dl au cours de laquelle le pli horizontal 7 est formé et une sous-étape D2 au cours de laquelle les deux plis inclinés 7a et 7b sont formés. Le pli horizontal est formé grâce à un outil 5a représenté sur la figure 2 et les plis inclinés verticalement 7a et 7b sont formés grâce à un outil 5b représenté également sur la figure 2 et plus en détail, en coupe transversale, à la figure 4. L'outil 5b intègrent deux rouleaux 5c et 5d montés en rotation antagoniste et pourvus d'une nervure 5e permettant de former les plis 7a et 7b. Ces rouleaux sont mus par un moteur 5f .The bag is then referenced during a second step B (also not shown in FIG. 2) then leveled horizontally during a step C using a knife 4. The leveling step makes it possible to obtain a height reference for the rest of the process. The tool used for this step is shown in more detail, in cross section, in Figure 3. In this Figure 3, the bag 1 is shown in dotted lines. The knife 4 is circular and rotated by a motor 4a. During step D, folds are marked in the upper part of the bag 1 using tools 5a, 5b. These folds include a horizontal fold 7 and two vertically inclined folds 7a and 7b The horizontal fold 7 formed here delimits the limit bottom of the bag closing area. In practice, and according to FIG. 2, this step of marking folds is broken down into two sub-steps, namely a sub-step D1 during which the horizontal fold 7 is formed and a sub-step D2 during which the two inclined folds 7a and 7b are formed. The horizontal fold is formed by a tool 5a shown in FIG. 2 and the vertically inclined folds 7a and 7b are formed by a tool 5b also shown in FIG. 2 and in more detail, in cross section, in FIG. 4. The tool 5b integrates two rollers 5c and 5d mounted in antagonistic rotation and provided with a rib 5e making it possible to form the folds 7a and 7b. These rollers are driven by a 5f motor.

Deux entailles verticales sont ensuite pratiquées dans la partie supérieure du sac 1 sur chaque côté de celui-ci lors d'une étape E. Ces deux entailles sont pratiquées à une distance déterminés des bords verticaux du sac 1. Cette étape est effectuée grâce à un outil représenté sur la figure 2 et, plus en détail en coupe transversale, à la figure5. Cet outil intègrent un couteau 6 mus en rotation selon la flèche 6a.Two vertical notches are then made in the upper part of the bag 1 on each side of the latter during a step E. These two notches are made at a determined distance from the vertical edges of the bag 1. This step is carried out using a tool shown in Figure 2 and, in more detail in cross section, in Figure 5. This tool integrates a knife 6 mus in rotation according to arrow 6a.

Lors de l'étape F, les flancs 8,8a de la zone de fermeture sont écartés comme symbolisés par les deux petites flèches grâce à un jeu de ventouses 15 et mis à plat. La présence des entailles verticales réalisées à l'étape E précédente facilite l'étape F. En pratique, cette étape de mise à plat est effectuée en deux étapes, à savoir une étape FI au cours de laquelle les flancs 8 et 8a de la zone de fermeture du sac sont écartés, et une étape F2 au cours de laquelle ces flancs sont mis à plat. L'outil utilisé pour l'étape FI est représenté sur la figure 2 et, plus en détail, en coupe transversale, à la figure 6. Il inclut des ventouses 15 qui permettent d'écarter les flancsδ et 8a. L'outil utilisé pour l'étape F2 est représenté sur la figure 2 et, plus en détail en vue latérale, sur la figure 7 . Au cours de l'étape G, ces flancs sont maintenus à plat grâce à outil intégrant un ski 9. L'outil utilisé lors de cette étape est représenté sur la figure 2 et, plus en détail en vue latérale à la figure 8. Lors de cette étape un pli longitudinal est pratiqué sur le dessus du sac grâce à un rouleau 9a . Les flancs 8 et 8a sont ensuite repliés l'un sur l'autre lors d'une étape H grâce à des guides portefeuilles statiques 13During step F, the flanks 8, 8a of the closure zone are separated as symbolized by the two small arrows by means of a set of suction cups 15 and laid flat. The presence of the vertical notches made in the previous step E facilitates the step F. In practice, this flattening step is carried out in two steps, namely a step FI during which the sides 8 and 8a of the zone closing the bag are discarded, and a step F2 during which these sides are laid flat. The tool used for step FI is represented in FIG. 2 and, in more detail, in cross section, in FIG. 6. It includes suction cups 15 which make it possible to separate the sides δ and 8a. The tool used for step F2 is represented in FIG. 2 and, in more detail in side view, in FIG. 7. During step G, these flanks are held flat using a tool incorporating a ski 9. The tool used during this step is shown in FIG. 2 and, in more detail in lateral view in FIG. 8. During from this step a longitudinal fold is made on the top of the bag using a roller 9a. The sides 8 and 8a are then folded over one another during a step H by means of static wallet guides 13

Lors de l'étape I, la partie supérieure du sac est nettoyée à l'aide d'un dispositif de brossage et d'aspiration 10.During stage I, the upper part of the bag is cleaned using a brushing and suction device 10.

Une bande adhésive constituée par une étiquette autocollante li a fort pouvoir collant pré-imprimée est ensuite déposée sur les flancs repliés de la zone de fermeture pour fermer le sac lors de l'étape J. La dépose de cette étiquette est effectuée en deux sous-étapes Jl et J2 consistant respectivement à déposer l'étiquette grâce à un dispositif adéquat tel que montré à la figure 2 puis à appuyer sur l'étiquette posée sur le sac grâce à un rouleau 12. Comme représenté sur la figure 9, cette bande adhésive présente un fil 1 la pour ouverture rapide.An adhesive strip constituted by a self-adhesive label li with a strong pre-printed adhesive power is then deposited on the folded sides of the closure zone to close the bag during step J. The removal of this label is carried out in two sub-steps. steps J1 and J2 consisting respectively of depositing the label using an appropriate device as shown in FIG. 2 then pressing the label placed on the bag using a roller 12. As shown in FIG. 9, this adhesive strip has a wire 1 la for quick opening.

Lors de l'étape K, un organe de compression 14 est utilisé pour appuyer sur l'étiquette 11 et sécuriser la fermeture du sac.During step K, a compression member 14 is used to press the label 11 and secure the closure of the bag.

Après l'étape K, le pincement de la zone supérieur du sac cesse et l'on obtient un sac fermé 1 de forme parallélépipédique comme représenté sur la figure 10 plus facile à stocker et à palletiser .After step K, the pinching of the upper zone of the bag ceases and a closed bag 1 of parallelepiped shape is obtained as shown in FIG. 10 which is easier to store and to palletize.

Le mode de réalisation de l'invention ici décrit n'a pas pour objet de réduire la portée de celle-ci, il pourra donc y être apporté de nombreuses modifications sans sortir de son cadre. The embodiment of the invention described here is not intended to reduce the scope thereof, it may therefore be made numerous modifications without departing from its scope.

Claims

REVENDICATIONS Procédé de fermeture d'un sac à gueule ouverte rempli d'un matériau pulvérulent ou de granulés caractérisant ce qui comprend les étapes consistant à : -pincer la partie supérieure du sac pour joindre les deux lèvres de la gueule de celui - ci à une distance (d) du bord supérieur du sac pour ménager une zone de fermeture ; CLAIMS Method of closing an open mouth bag filled with a pulverulent material or granules characterizing which comprises the steps consisting in: - pinching the upper part of the bag to join the two lips of the mouth thereof to a distance (d) from the upper edge of the bag to provide a closure zone; - écarter les flancs de la zone de fermeture ; -mettre à plat ces flancs ; -replier les flancs l'un sur l'autre ;- move aside the sides of the closed area; flatten these flanks; -fold the sides one over the other; -apposer des moyens de fermeture incluant une bande adhésive sur lesdits flancs repliés;affixing closure means including an adhesive strip on said folded sides; - cesser le pincement de la partie supérieure du sac. Procédé selon la revendication 1 caractérisé en ce qu'il comprend une étape préalable consistant à araser horizontalement la gueule du sac. Procédé selon l'une des revendications 1 ou 2 caractérisé en ce qu'il comprend une étape préalable consistant à effectuer au moins deux entailles verticales sur les cotés de la gueule du sac. Procédé selon l'une des revendications 1 à 3 caractérisé en ce qu'il comprend une étape consistant à comprimer ladite bande adhésive après que celle-ci a été déposée sur le sac ou au moment où celle-ci est déposée sur le sac. Procédé selon l'une des revendications 1 à 4 caractérisé en ce que ladite bande adhésive est une bande auto-adhésive. Procédé selon l'une des revendications 1 à 5 caractérisé en ce que ladite bande adhésive coopère avec au moins un fil d'ouverture rapide. 7 Procédé selon l'une des revendications 1 à 6 caractérisé en ce que ladite bande adhésive est une bande pré-imprimée.- stop pinching the upper part of the bag. A method according to claim 1 characterized in that it comprises a prior step consisting in leveling the mouth of the bag horizontally. Method according to one of claims 1 or 2 characterized in that it comprises a preliminary step consisting in making at least two vertical cuts on the sides of the mouth of the bag. Method according to one of claims 1 to 3 characterized in that it comprises a step consisting in compressing said adhesive strip after it has been deposited on the bag or when it is deposited on the bag. Method according to one of claims 1 to 4 characterized in that said adhesive strip is a self-adhesive strip. Method according to one of claims 1 to 5 characterized in that said adhesive strip cooperates with at least one quick opening wire. 7 Method according to one of claims 1 to 6 characterized in that said adhesive strip is a pre-printed strip. 8 Procédé selon l'une quelconque des revendications 1 à 6 caractérisé en ce qu'il comprend une étape complémentaire d'impression de ladite bande avant ou pendant ou après son collage sur le sac.8 Method according to any one of claims 1 to 6 characterized in that it comprises an additional step of printing said strip before or during or after it is bonded to the bag. 9 Procédé selon l'une des revendications 1 à 8 caractérisé en ce qu'il comprend au moins une étape supplémentaire de nettoyage du sac par brossage et aspiration.9 Method according to one of claims 1 to 8 characterized in that it comprises at least one additional step of cleaning the bag by brushing and suction. 10 Procédé selon la revendication 9 caractérisé en ce que ladite étape de nettoyage est effectuée entre ladite étape de repliage des flancs l'un sur l'autre et ladite étape de pose de ladite bande collante.10 Method according to claim 9 characterized in that said cleaning step is carried out between said step of folding the sidewalls one on the other and said step of laying said adhesive strip. 11 Procédé selon l'une quelconque des revendications 1 à 10 caractérisé en ce qu'il comprend une étape consistant à intégrer un bec verseur dans le sac. 12. Procédé selon l'une quelconque des revendications 1 à 11 caractérisé en ce qu'il comprend une étape de scellage de l'ouverture de sac concomitante à ladite étape de pincement. 13 Installation de fermeture de sacs à gueule ouverte remplis de matériau pulvérulent ou de granulés spécialement conçue pour la mise en œuvre du procédé selon l'une quelconque des revendications 1 à 12 caractérisée en ce qu'elle comprend : au moins un dispositif d'entraînement (2) présentant au moins un rail (3) permettant de pincer la gueule du sac (1) de façon à délimiter une zone de fermeture; des moyens (15) permettant d'écarter les flancs de la zone de fermeture; des moyens (9) permettant de mettre à plat les flancs de la zone de fermeture ; des moyens (13) permettant de replier l'un sur l'autre les flancs de la zone de fermeture; et, des moyens (10) pour déposer sur les flancs repliés au moins une bande adhésive (11) de fermeture. 14 Installation selon la revendication 13 caractérisée en ce que lesdits moyens permettant d'écarter les flancs de la zone de fermeture incluent au moins deux ventouses.11 Method according to any one of claims 1 to 10 characterized in that it comprises a step of integrating a pouring spout in the bag. 12. Method according to any one of claims 1 to 11 characterized in that it comprises a sealing step of the bag opening concomitant with said pinching step. 13 Installation for closing open mouth bags filled with pulverulent material or granules specially designed for the implementation of the method according to any one of claims 1 to 12 characterized in that it comprises: at least one drive device (2) having at least one rail (3) making it possible to pinch the mouth of the bag (1) so as to delimit a closure zone; means (15) making it possible to separate the flanks from the closure zone; means (9) for flattening the sides of the closure zone; means (13) making it possible to fold the flanks of the closure zone over one another; and, means (10) for depositing on the folded sides at least one adhesive strip (11) for closure. 14 Installation according to claim 13 characterized in that said means for deviating the sides of the closed area include at least two suction cups. 15 Installation selon la revendication 13 ou 14 caractérisée en ce que lesdits moyens (13) pour replier l'un sur l'autre les flancs de la zone de fermeture incluent au moins deux guides portefeuilles statiques ou mobiles15 Installation according to claim 13 or 14 characterized in that said means (13) for folding one on the other the sides of the closing zone include at least two static or mobile wallet guides 16 Installation selon l'une quelconque des revendications 13 à 15 caractérisée en ce qu'elle inclut également au moins un organe de compression (14) de la bande adhésive sur le sac.16 Installation according to any one of claims 13 to 15 characterized in that it also includes at least one compression member (14) of the adhesive strip on the bag. 17 Installation selon l'une quelconque des revendications 13 à 16 caractérisée en ce qu'elle comprend des moyens (10) de nettoyage du sac.17 Installation according to any one of claims 13 to 16 characterized in that it comprises means (10) for cleaning the bag. 18 Installation selon la revendication 17 caractérisée en ce que lesdits moyens (10) de nettoyage sont constitués par un dispositif de brossage et d'aspiration.18 Installation according to claim 17 characterized in that said means (10) for cleaning are constituted by a brushing and suction device. 19. Installation selon l'une quelconque des revendications 13 à 18 caractérisée en ce qu'elle comprend également des moyens de soudure des lèvres de la gueule du sac. 19. Installation according to any one of claims 13 to 18 characterized in that it also comprises means for welding the lips of the mouth of the bag.
PCT/FR2001/003556 2000-11-13 2001-11-13 Method for closing an open-mouth bag filled with a powdery material and installation for implementing said method Ceased WO2002038446A1 (en)

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AU2002223065A AU2002223065A1 (en) 2000-11-13 2001-11-13 Method for closing an open-mouth bag filled with a powdery material and installation for implementing said method

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FR00/14561 2000-11-13
FR0014561A FR2816586B1 (en) 2000-11-13 2000-11-13 METHOD FOR CLOSING AN OPEN MOUTH BAG AND INSTALLATION FOR CARRYING OUT SUCH A METHOD

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2012119667A1 (en) * 2011-03-07 2012-09-13 Statec Binder Gmbh Open-mouth bag or bag closed at two ends having an end region closed by means of a web of material, process and device for closing a bag

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291280A (en) * 1939-07-14 1942-07-28 Pneumatic Scale Corp Apparatus for applying sealing strips to containers
DE19840793A1 (en) * 1998-09-08 2000-03-09 Chronos Richardson Gmbh Handling of sacks during filling involves turning over sack tops to form collar against which testing and filling mechanisms can form seal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291280A (en) * 1939-07-14 1942-07-28 Pneumatic Scale Corp Apparatus for applying sealing strips to containers
DE19840793A1 (en) * 1998-09-08 2000-03-09 Chronos Richardson Gmbh Handling of sacks during filling involves turning over sack tops to form collar against which testing and filling mechanisms can form seal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012119667A1 (en) * 2011-03-07 2012-09-13 Statec Binder Gmbh Open-mouth bag or bag closed at two ends having an end region closed by means of a web of material, process and device for closing a bag

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FR2816586B1 (en) 2003-01-10
FR2816586A1 (en) 2002-05-17
AU2002223065A1 (en) 2002-05-21

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