EP0142456A2 - Method of shaping the bottom of a bag of flexible material starting from a cushion filled with a liquid - Google Patents

Method of shaping the bottom of a bag of flexible material starting from a cushion filled with a liquid Download PDF

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Publication number
EP0142456A2
EP0142456A2 EP84440049A EP84440049A EP0142456A2 EP 0142456 A2 EP0142456 A2 EP 0142456A2 EP 84440049 A EP84440049 A EP 84440049A EP 84440049 A EP84440049 A EP 84440049A EP 0142456 A2 EP0142456 A2 EP 0142456A2
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EP
European Patent Office
Prior art keywords
cushion
welding
filled
liquid
clamp
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
EP84440049A
Other languages
German (de)
French (fr)
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EP0142456B1 (en
EP0142456A3 (en
Inventor
Raoul Gautier
Michel Cazes
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.)
Societe Generale des Eaux Minerales de Vittel SA
Original Assignee
Societe Generale des Eaux Minerales de Vittel SA
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.)
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Publication date
Application filed by Societe Generale des Eaux Minerales de Vittel SA filed Critical Societe Generale des Eaux Minerales de Vittel SA
Priority to AT84440049T priority Critical patent/ATE27435T1/en
Publication of EP0142456A2 publication Critical patent/EP0142456A2/en
Publication of EP0142456A3 publication Critical patent/EP0142456A3/en
Application granted granted Critical
Publication of EP0142456B1 publication Critical patent/EP0142456B1/en
Expired 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/24—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for shaping or reshaping completed packages

Definitions

  • the cushion (1) On a support beam (6) of any section, for example rectangular or even trapezoidal, the small base being directed upwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Package Closures (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Bag Frames (AREA)

Abstract

1. Process for forming the bottom of a sachet of flexible synthetic material from a cushion (1) of synthetic material filled with liquid, and for imparting stability to it, in which the filled cushion (1) is disposed on a support beam (6) of width less than the width of the cushion in such manner that at least one of the lower corners (7, 8) of the cushion protrudes beyond the beam, tending downwards, characterised in that a gripper (9, 10) is applied to each side of the beam, the exerted pressure force of which gripper expelsthe liquid contained in the said corner or corners, in that welding is effected along at least one line which will impart stability to the sachet, thus forming at least one lug, each corresponding to a corner (7, 8).

Description

La présente invention a pour objet un procédé pour former le fond d'un sachet en matière synthétique souple à partir d'un coussin en matière synthétique rempli de liquide et pour lui donner de la stabilité. L'invention a également pour objet les sachets obtenus selon ce procédé et l'unité de soudure et de découpe pour sa mise en oeuvre.The subject of the present invention is a process for forming the bottom of a flexible plastic bag from a plastic cushion filled with liquid and for giving it stability. The subject of the invention is also the sachets obtained according to this process and the welding and cutting unit for its implementation.

Lors de la réalisation des récipients en matière synthétique souple, l'un des problèmes posés est celui de la stabilité du sachet, obtenue par une conformation spécifique du fond du sachet pour permettre sa pose sur une surface plane.When producing flexible plastic containers, one of the problems posed is that of the stability of the bag, obtained by a specific conformation of the bottom of the bag to allow it to be placed on a flat surface.

De multiples structures ont été proposées et donnent satisfaction.Multiple structures have been proposed and are satisfactory.

Ainsi par exemple, comme dans la demande française 75-18358 au nom de la demanderesse, le fond du sachet est conformé en W par pliage du film de matière synthétique avant remplissage.Thus, for example, as in French application 75-18358 in the name of the applicant, the bottom of the sachet is shaped into a W by folding the film of synthetic material before filling.

De la même manière le brevet français 71-20879 propose de conformer le fond par soudure et découpe des angles formant oreilles après pliage du fond. Dans ces réalisations il est impératif que le sachet soit vide.In the same way the French patent 71-20879 proposes to conform the bottom by welding and cutting of the angles forming ears after folding of the bottom. In these embodiments it is imperative that the bag is empty.

Si le fond en W permet un travail en continu sur machine à cheminement horizontal, la structure du brevet 71-20879 ne peut être obtenue de manière continue.If the W-shaped bottom allows continuous work on a horizontal routing machine, the structure of patent 71-20879 cannot be obtained continuously.

En outre, les deux réalisations proposées sont nécessairement réalisées à partir de sachets vides, à un stade donné de leur conformation.In addition, the two proposed embodiments are necessarily made from empty bags, at a given stage of their conformation.

Le besoin se fait donc sentir d'un procédé permettant de réaliser en continu des sachets à fond plat, avec les mêmes avantages que le fond en W, tout en autorisant l'intervention sur un sachet rempli, à l'état intermédiaire de coussin, plus particulièrement pour un procédé de cheminement en vertical, conduisant à une succession de coussins à partir d'un boudin continu de film.There is therefore a need for a process allowing continuous production of sachets with a flat bottom, with the same advantages as the W-shaped bottom, while allowing intervention on a filled sachet, in the intermediate state of a cushion, more particularly for a vertical tracking process, leading to a succession of cushions from a continuous roll of film.

Conformément à l'invention, ce résultat est obtenu avec un procédé pour former le fond d'un sachet en matière synthétique souple à partir d'un coussin en matière synthétique rempli de liquide et pour lui donner de la stabilité, caractérisé en ce qu'il consiste à disposer le coussin rempli sur une poutre support de largeur inférieure à la largeur du coussin de manière à ce que au moins l'un des coins inférieurs du coussin déborde par rapport à la poutre en tendant vers le bas, que l'on applique sur chaque côté de la poutre une pince dont l'effort de pression exercé chasse le liquide contenu dans le ou les coins précités, que l'on soude selon au moins une ligne qui donnera la stabilité au sachet, déterminant ainsi au moins une oreille correspondant chacune à un coin.In accordance with the invention, this result is obtained with a process for forming the bottom of a flexible plastic bag from a plastic cushion filled with liquid and for giving it stability, characterized in that it consists in placing the filled cushion on a support beam with a width less than the width of the cushion so that at least one of the lower corners of the cushion projects beyond the beam, tending downward, which is apply on each side of the beam a clamp whose exerted pressure force drives out the liquid contained in the above-mentioned corner (s), which is welded along at least one line which will give stability to the sachet, thus determining at least one ear each corresponding to a corner.

Avantageusement, le coussin sera disposé sur la poutre support de manière telle que deux coins inférieurs débordent par rapport à la poutre.Advantageously, the cushion will be placed on the support beam in such a way that two lower corners project beyond the beam.

Selon un autre mode avantageux de mise en oeuvre la soudure sera opérée de manière continue. Dans cette réalisa- sation la poutre-support est constituée par une courroie faisant office de bande transporteuse. La soudure est réalisée par des rubans chauffants se déplaçant à la même vitesse que la courroie.According to another advantageous embodiment, the welding will be carried out continuously. In this embodiment, the support beam is constituted by a belt acting as a conveyor belt. The welding is carried out by heating tapes moving at the same speed as the belt.

Bien qu'il soit particulièrement adapté aux machines i cheminement vertical, ce procédé peut également être transposé aux machines à cheminement horizontal.Although it is particularly suitable for machines with vertical routing, this process can also be transposed to machines with horizontal routing.

On comprendra mieux l'invention à l'aide de la description ci-après d'un mode non limitatif de mise en oeuvre du procédé en référence aux dessins annexés dans lesquels :

  • - la figure 1 illustre le positionnement du coussin rempli sur la poutre support,
  • - la figure 2 illustre l'opération de pinçage, de soudure et de découpe,
  • - la figure 3 représente une coupe schématique de la pince de soudure et de découpe.
The invention will be better understood with the aid of the description below of a non-limiting mode of implementing the method with reference to the appended drawings in which:
  • FIG. 1 illustrates the positioning of the filled cushion on the support beam,
  • FIG. 2 illustrates the pinching, welding and cutting operation,
  • - Figure 3 shows a schematic section of the welding and cutting pliers.

On fera référence dans ce qui suit à un cheminement en vertical, mais il doit être compris que le procédé est parfaitement adaptable à un cheminement en horizontal comme par exemple décrit dans la demande de brevet français 80-13039 au nom de la demanderesse.Reference will be made in the following to a vertical path, but it should be understood that the method is perfectly adaptable to a horizontal path as for example described in French patent application 80-13039 in the name of the applicant.

Le problème posé consiste, dans le cas du cheminement vertical , à donner une stabilité et une forme au fond d'un coussin (1) rempli de liquide (2). Le coussin est obtenu à partir d'un film enroulé sur un mandrin, et comporte trois lignes de soudure (3,4,5). Ceci est en soi bien connu de l'homme de l'art.The problem posed consists, in the case of vertical routing, in giving stability and shape to the bottom of a cushion (1) filled with liquid (2). The cushion is obtained from a film wound on a mandrel, and has three weld lines (3,4,5). This in itself is well known to those skilled in the art.

Pour conformer le fona, on prévoit selon l'invention de disposer le coussin (1) sur une poutre-support (6) de section quelconque, par exemple rectangulaire ou encore trapézoïdale, la petite base étant dirigée vers le haut.To conform the fona, provision is made according to the invention to arrange the cushion (1) on a support beam (6) of any section, for example rectangular or even trapezoidal, the small base being directed upwards.

Dans le cas d'un cheminement vertical, la longueur de cette poutre devra être simplement suffisante pour recevoir un sachet. Pour un cheminement horizontal, la poutre pourra être plus longue et servir de guide et de support aux sachets en chapelet pendant une partie de leur trajet.In the case of a vertical path, the length of this beam should be simply sufficient to receive a bag. For a horizontal path, the beam can be longer and serve as a guide and support for the rosary bags during part of their journey.

Dans le cheminement vertical, on disposera cette poutre par exemple juste après le poste de coupe des coussins en éléments individuels à partir du boudin continu, de manière à les laisser tomber d'une hauteur de quelques centimètres sur la poutre-support pour bien marquer les arêtes des coins. Ce poste peut également être prévu en fonctionnement pendant le remplissage, en faisant monter la poutre vers le coussin.In the vertical path, this beam will be placed, for example just after the post for cutting the cushions into individual elements from the continuous rod, so as to drop them from a height of a few centimeters on the support beam to mark the corner edges. This station can also be provided in operation during filling, by raising the beam towards the cushion.

En effet, la largeur de la poutre, est choisie de manière telle que, lorsqu'il y est centré, le coussin rempli présente deux coins (7,8) débordant par rapport à la poutre et tendant vers le bas, par simple gravité. C'est ce qui a été schématisé à la figure 1.In fact, the width of the beam is chosen so that, when it is centered there, the filled cushion has two corners (7,8) projecting relative to the beam and tending downwards, by simple gravity. This is shown diagrammatically in Figure 1.

On se référera maintenant à la figure 2. Le coussin étant toujours dans la position de la figure 1, on applique de chaque côté de la poutre (6) une pince à souder (9,10) qui a une double fonction :

  • - exercer une pression sur les coins (7,8) de manière à chasser le liquide qui y est contenu vers l'intérieur du coussin et appliquer les coins contre les parois latérales de la poutre ;
  • - déterminer une ligne de soudure à un niveau le plus élevé possible par rapport au plan supérieur de la poutre.
We will now refer to Figure 2. The cushion is still in the position of Figure 1, we apply on each side of the beam (6) a welding pliers (9,10) which has a double function:
  • - exert pressure on the corners (7,8) so as to expel the liquid contained therein towards the inside of the cushion and apply the corners against the side walls of the beam;
  • - determine a weld line at the highest possible level in relation to the upper plane of the beam.

A ce stade, le coussin se présente donc avec une base ayant deux arêtes linéaires reliées par deux contours indéfinis prenant une configuration courbe lorsque le coussin est posé verticalement sur une surface plane, les deux arêtes se prolongeant par deux oreilles correspondant aux coins (7,8).At this stage, the cushion therefore presents itself with a base having two linear edges connected by two indefinite contours taking a curved configuration when the cushion is placed vertically on a flat surface, the two edges being extended by two ears corresponding to the corners (7, 8).

Il est possible de laisser ces oreilles telles quelles.It is possible to leave these ears as they are.

Il est également envisageable de les enrouler par un dispositif à pince tournante objet d'une demande déposée conjointement par la demanderesse.It is also conceivable to wind them by a tweezer device which is the subject of an application filed jointly by the applicant.

Avantageusement, ces oreilles seront coupées par des lames intégrées aux pinces à souder et sectionnant lesdites oreilles, juste après l'opération de soudure ou même pendant le remplissage.Advantageously, these ears will be cut by blades integrated into the welding tongs and sectioning said ears, just after the welding operation or even during filling.

Une pince complète assurant l'ensemble des opérations comporte donc :

  • - une surface d'appui (11) pour presser le coin contre la poutre,
  • - un organe de soudure (12)
  • - une lame (13) mobile dans la pince.
A complete clamp ensuring all operations therefore includes:
  • - a bearing surface (11) for pressing the corner against the beam,
  • - a welding member (12)
  • - a blade (13) movable in the clamp.

On a présenté à la figure 3 une variante dans laquelle la tête de soudure (15) et la lame (16) sont intégrées à la poutre (6'). La pince (9') subsiste donc, mais son seul rôle est d'appliquer le coin contre le support.FIG. 3 shows a variant in which the welding head (15) and the blade (16) are integrated into the beam (6 '). The clamp (9 ') therefore remains, but its only role is to apply the wedge against the support.

On pourra prévoir sur la poutre ou la pince, en-dessous de la lame de coupe, une surface d'appui (14) en matériau moins dur que la poutre ou la pince pour éviter de crever les coins avant soudure.It will be possible to provide on the beam or the clamp, below the cutting blade, a bearing surface (14) made of material that is less hard than the beam or the clamp to avoid burst the corners before welding.

De même, pour éviter que le liquide chassé des coins (7,8) ne soit chassé vers le bas, il est important que la surface d'appui des pinces (9,10) soit dans tous les cas plus grande que les coins (7,8) de manière à ce que ceux-ci soient sollicités sur toute leur surface.Likewise, to avoid that the liquid expelled from the corners (7,8) is expelled downwards, it is important that the bearing surface of the clamps (9,10) is in any case larger than the corners ( 7,8) so that they are stressed over their entire surface.

Claims (8)

1. Procédé pour former le fond d'un sachet en matière synthétique souple à partir d'un coussin en matière synthétique rempli de liquide et pour lui donner de la stabilité, caractérisé en ce qu'il consiste à disposer le coussin (1) rempli sur une poutre-support (6) de largeur inférieure à la largeur du coussin de manière à ce que au moins l'un des coins inférieurs (7,8) du coussin déborde par rapport à la poutre en tendant vers le bas, que l'on applique sur chaque côté de la poutre une pince (9,10) dont l'effort de pression exercé chasse le liquide contenu dans 1e ou les coins précités, que l'on soude au moins une ligne qui donnera la stabilité au sachet, déterminant ainsi au moins une oreille correspondant chacune à un coin (7,8).1. A method for forming the bottom of a flexible plastic bag from a plastic cushion filled with liquid and for giving it stability, characterized in that it consists in placing the cushion (1) filled on a support beam (6) of width less than the width of the cushion so that at least one of the lower corners (7,8) of the cushion projects relative to the beam while tending downward, that l a clamp (9, 10) is applied to each side of the beam, the pressure exerted on it drives out the liquid contained in the above-mentioned corner (s), which is welded at least one line which will give stability to the sachet, thus determining at least one ear each corresponding to a corner (7,8). 2. Procédé selon la revendication 1, caractérisé en ce que les oreilles correspondant aux coins (7,8) sont coupées par une lame intégrée à la pince à souder.2. Method according to claim 1, characterized in that the ears corresponding to the corners (7,8) are cut by a blade integrated in the welding tongs. 3. Procédé selon l'une quelconque des revendication 1 et 2, caractérisé en ce que le coussin rempli tombe sur la poutre (6).3. Method according to any one of claims 1 and 2, characterized in that the filled cushion falls on the beam (6). 4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la poutre-support (6) monte vers le coussin pendant le remplissage de celui-ci pour former les oreilles (7,8) et que la découpe et la soudure de ceux-ci sont réalisées pendant le remplissage.4. Method according to any one of claims 1 to 3, characterized in that the support beam (6) rises towards the cushion during filling thereof to form the ears (7,8) and that the cutting and the welding of these is carried out during filling. 5. Procédé selon la revendication 1, caractérisé en ce que la poutre-support est réalisée sous la forme d'une courroie faisant office de bande transporteuse, la soudure étant réalisée par des rubans chauffants se déplaçant à la même vitesse que la courroie.5. Method according to claim 1, characterized in that the support beam is produced in the form of a belt acting as a conveyor belt, the welding being carried out by heating tapes moving at the same speed as the belt. 6. Unité de soudure et de découpe pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 5 caractérisée en ce qu'elle comporte : - une pince (9,10,9') - une tête de soudure - une lame de coupe - une poutre-support. 6. Welding and cutting unit for implementing the method according to any one of claims 1 to 5, characterized in that it comprises: - pliers (9,10,9 ') - a welding head - a cutting blade - a support beam. 7. Unité selon la revendication 6, caractérisée en ce que la tête de soudure (15) et la lame (16) sont intégrées à la poutre (6).7. Unit according to claim 6, characterized in that the welding head (15) and the blade (16) are integrated into the beam (6). 8. Unité selon l'une quelconque des revendications 6 et 7 caractérisée en ce que la poutre (6,6') ou la pince (9,10,9') comportent une surface d'appui (14) en matériau moins dur que la poutre ou la pince.8. Unit according to any one of claims 6 and 7 characterized in that the beam (6.6 ') or the clamp (9,10,9') have a bearing surface (14) made of less hard material than beam or clamp.
EP84440049A 1983-11-15 1984-11-13 Method of shaping the bottom of a bag of flexible material starting from a cushion filled with a liquid Expired EP0142456B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84440049T ATE27435T1 (en) 1983-11-15 1984-11-13 PROCESS FOR FORMING THE BOTTOM OF A SACK OF FLEXIBLE PLASTIC MATERIAL FROM A CUSHION FILLED WITH LIQUID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8318255 1983-11-15
FR8318255A FR2554783B1 (en) 1983-11-15 1983-11-15 PROCESS FOR FORMING THE BOTTOM OF U

Publications (3)

Publication Number Publication Date
EP0142456A2 true EP0142456A2 (en) 1985-05-22
EP0142456A3 EP0142456A3 (en) 1985-06-26
EP0142456B1 EP0142456B1 (en) 1987-05-27

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Application Number Title Priority Date Filing Date
EP84440049A Expired EP0142456B1 (en) 1983-11-15 1984-11-13 Method of shaping the bottom of a bag of flexible material starting from a cushion filled with a liquid

Country Status (5)

Country Link
EP (1) EP0142456B1 (en)
JP (1) JPH06538B2 (en)
AT (1) ATE27435T1 (en)
DE (1) DE3463919D1 (en)
FR (1) FR2554783B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988006125A1 (en) * 1987-02-19 1988-08-25 Societe Generale Des Eaux Minerales De Vittel Process for forming the base of a bag in flexible synthetic material, and device for implementing said process
FR2611182A2 (en) * 1983-11-15 1988-08-26 Vittel Eaux Min Method for forming the base of a bag made from flexible synthetic material and device for implementing it
EP0167469B1 (en) * 1984-06-25 1988-10-26 Societe Generale Des Eaux Minerales De Vittel Device for heat-sealing and cutting at least a top corner of a bag of synthetic material
FR2674825A1 (en) * 1991-04-05 1992-10-09 Prepac Pouch which stands upright made from a flexible film and manufacturing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1305240B1 (en) * 1998-06-04 2001-04-19 Burgopack Stampa Trasformazione Imballaggi Spa A PROCEDURE FOR MAKING TUBE PACKAGES IN FLEXIBLE MATERIAL, AN EQUIPMENT TO PERFORM THE PROCEDURE AND A

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1259662A (en) * 1960-05-30 1961-04-28 Habra Werk Ott Kg Method and device for closing filled block bottom bags
FR1332651A (en) * 1962-06-05 1963-07-19 Remy & Cie E P Method and device for closing and shaping flexible packaging filled with liquid
DE1270477B (en) * 1962-05-29 1968-06-12 Habra Werk Ott Kg Device for completing or storing filled and closed block bottom bags

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1259662A (en) * 1960-05-30 1961-04-28 Habra Werk Ott Kg Method and device for closing filled block bottom bags
DE1270477B (en) * 1962-05-29 1968-06-12 Habra Werk Ott Kg Device for completing or storing filled and closed block bottom bags
FR1332651A (en) * 1962-06-05 1963-07-19 Remy & Cie E P Method and device for closing and shaping flexible packaging filled with liquid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611182A2 (en) * 1983-11-15 1988-08-26 Vittel Eaux Min Method for forming the base of a bag made from flexible synthetic material and device for implementing it
EP0167469B1 (en) * 1984-06-25 1988-10-26 Societe Generale Des Eaux Minerales De Vittel Device for heat-sealing and cutting at least a top corner of a bag of synthetic material
WO1988006125A1 (en) * 1987-02-19 1988-08-25 Societe Generale Des Eaux Minerales De Vittel Process for forming the base of a bag in flexible synthetic material, and device for implementing said process
FR2674825A1 (en) * 1991-04-05 1992-10-09 Prepac Pouch which stands upright made from a flexible film and manufacturing method

Also Published As

Publication number Publication date
FR2554783A1 (en) 1985-05-17
FR2554783B1 (en) 1986-08-22
ATE27435T1 (en) 1987-06-15
JPS6121326A (en) 1986-01-30
DE3463919D1 (en) 1987-07-02
JPH06538B2 (en) 1994-01-05
EP0142456B1 (en) 1987-05-27
EP0142456A3 (en) 1985-06-26

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