EP0303654B1 - Process for forming the base of a bag in flexible synthetic material, and device for implementing said process - Google Patents

Process for forming the base of a bag in flexible synthetic material, and device for implementing said process Download PDF

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Publication number
EP0303654B1
EP0303654B1 EP88901850A EP88901850A EP0303654B1 EP 0303654 B1 EP0303654 B1 EP 0303654B1 EP 88901850 A EP88901850 A EP 88901850A EP 88901850 A EP88901850 A EP 88901850A EP 0303654 B1 EP0303654 B1 EP 0303654B1
Authority
EP
European Patent Office
Prior art keywords
bag
cushion
jaw
cheek
corners
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.)
Expired - Lifetime
Application number
EP88901850A
Other languages
German (de)
French (fr)
Other versions
EP0303654A1 (en
Inventor
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.)
Filing date
Publication date
Priority claimed from FR8702436A external-priority patent/FR2611182B2/en
Application filed by Societe Generale des Eaux Minerales de Vittel SA filed Critical Societe Generale des Eaux Minerales de Vittel SA
Priority to AT88901850T priority Critical patent/ATE69776T1/en
Publication of EP0303654A1 publication Critical patent/EP0303654A1/en
Application granted granted Critical
Publication of EP0303654B1 publication Critical patent/EP0303654B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/15—Combined or convertible surface bonding means and/or assembly means

Definitions

  • the present invention relates to a device for forming the bottom of a flexible plastic bag from a plastic cushion filled with liquid and for giving it stability, comprising a support beam of width less than the width of the cushion and on which it is arranged so that the two lower corners of the cushion protrude relative to the beam while tending downward, with a clamp on each side of the beam of the jaw the pressure exerted expels the liquid contained in the two aforementioned corners, then welding along two lines which will give stability to the bag, thus determining two ears corresponding to the corners.
  • the filled cushion is placed on a support beam with a width less than the width of the cushion so that the two lower corners of the cushion protrude relative to the beam, tending downwards, then applied on each side. of the beam a clamp whose gripping force exerted drives the liquid contained in the two aforementioned corners, with subsequent welding along two lines which will give stability to the bag, thus determining two ears corresponding to the corners.
  • document FR-A-1329553 describes a device for forming and closing a package in which a roller cooperates with a counter-bearing surface, said roller being articulated on a clamp so that when the advancement of the latter towards the place to be welded the point of contact of the roller on the bag moves gradually, so as to also gradually expel the liquid towards the inside of the bag.
  • the kinematics are however complex and cannot be transposed to specific problem to be solved, that is to say the elimination of the liquid in the horns of a flexible cushion disposed on a support beam, the lower corners of the cushion projecting relative to the beam while tending downward.
  • the object of the present invention is to remedy these drawbacks of the devices of the prior art.
  • the jaws each comprise a concave flange which cooperates with a flat counter surface or itself consisting of an identical flange, said concave flanges being articulated in rotation on each jaw so that as it advances towards the corner to be welded the point of contact of the flange on the corner of the sachet gradually moves upward, so as to gradually expel the liquid contained in said upward corner, that is to say inside the bag, each clamp consisting of a pair of jaws movable in plane translation relative to each other, and each flange being biased in pressure tending to keep them projecting by an elastic means.
  • the device consists for example of a pair of jaws (100, 101) movable in translation in a horizontal plane with respect to each other, for example under the action of jacks such as (102).
  • welding means (103, 104) in themselves known and which will not be described in more detail.
  • each jaw On the underside of each jaw is attached a flange (105,106) articulated in rotation thereon along an axis (107,108).
  • the flanges are stressed under pressure tending to keep them projecting, in the direction of one another, by an elastic means such as spring (109) or leaf spring (110).
  • a corner of the bag is disposed between the two flanges and, respectively, the jaws. It is at this stage filled with liquid.
  • the two jaws are brought closer to one another, which then come into contact through the lower ends (111, 112) of their respective flanges.
  • the point of contact between the flanges rises upwards, thus expelling the liquid from the corner which is inserted therein.
  • one of the jaws may comprise only a flat wing, perpendicular to the horizontal plane of the jaws, the other jaw comprising a flange as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Package Closures (AREA)
  • Bag Frames (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)

Abstract

PCT No. PCT/FR88/00070 Sec. 371 Date Oct. 19, 1988 Sec. 102(e) Date Oct. 19, 1988 PCT Filed Feb. 9, 1988 PCT Pub. No. WO88/06125 PCT Pub. Date Aug. 25, 1988.Process for soldering the lower corners of a bag. Liquid is forced by the gradual moving together of two concave flasks (105, 106), of which the point of contact rises gradually towards the top with the relative moving together of the jaws (100, 101). Application to the conditioning of liquids.

Description

La présente invention a pour objet un dispositif 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, comportant une poutre-support de largeur inférieure à la largeur du coussin et sur laquelle est disposé celui-ci de manière à ce que les deux coins inférieurs du coussin débordent par rapport à la poutre en tendant vers le bas, avec application sur chaque côté de la poutre de la mâchoire d'une pince dont l'effort de pression exercé chasse le liquide contenu dans les deux coins précités, puis soudure selon deux lignes qui donneront la stabilité au sachet, déterminant ainsi deux oreilles correspondant aux coins.The present invention relates to a device for forming the bottom of a flexible plastic bag from a plastic cushion filled with liquid and for giving it stability, comprising a support beam of width less than the width of the cushion and on which it is arranged so that the two lower corners of the cushion protrude relative to the beam while tending downward, with a clamp on each side of the beam of the jaw the pressure exerted expels the liquid contained in the two aforementioned corners, then welding along two lines which will give stability to the bag, thus determining two ears corresponding to the corners.

Un dispositif de ce type a fait l'objet du document EP-A-0142456 au nom de la demanderesse, qui est incorporé ici par voie de référence.A device of this type has been the subject of document EP-A-0142456 in the name of the applicant, which is incorporated here by way of reference.

Dans ce dispositif on dispose le coussin rempli sur une poutre-support de largeur inférieure à la largeur du coussin de manière à ce que les deux coins inférieurs du coussin débordent par rapport à la poutre en tendant vers le bas, puis on applique sur chaque côté de la poutre une pince dont l'effort de préhension exercé chasse le liquide contenu dans les deux coins précités, avec soudure ultérieure selon deux lignes qui donneront la stabilité au sachet, déterminant ainsi deux oreilles correspondant aux coins.In this device, the filled cushion is placed on a support beam with a width less than the width of the cushion so that the two lower corners of the cushion protrude relative to the beam, tending downwards, then applied on each side. of the beam a clamp whose gripping force exerted drives the liquid contained in the two aforementioned corners, with subsequent welding along two lines which will give stability to the bag, thus determining two ears corresponding to the corners.

Bien que ce dispositif donne entière satisfaction, il est apparu qu'il était encore possible de le perfectionner.Although this device is entirely satisfactory, it appeared that it was still possible to improve it.

En effet, lorsque les mâchoires de la pince viennent s'appliquer sur les coins pour en chasser le liquide qui y est contenu, on risque d'obtenir parfois une évacuation imparfaite du liquide car l'effort exercé l'est perpendiculairement au plan desdits coins.In fact, when the jaws of the pliers come to apply on the corners to drive out the liquid which is contained therein, there is sometimes a risk of obtaining an imperfect evacuation of the liquid because the force exerted is perpendicular to the plane of said corners .

De la même manière, le document FR-A-1329553 décrit un dispositif de formage et fermeture d'un emballage dans lequel un galet coopère avec une surface de contre-appui, ledit galet étant articulé sur une pince de manière à ce que lors de l'avancement de celle-ci vers l'endroit à souder le point de contact du galet sur le sachet se déplace progressivement, de manière à chasser également progressivement le liquide vers l'intérieur du sachet.Similarly, document FR-A-1329553 describes a device for forming and closing a package in which a roller cooperates with a counter-bearing surface, said roller being articulated on a clamp so that when the advancement of the latter towards the place to be welded the point of contact of the roller on the bag moves gradually, so as to also gradually expel the liquid towards the inside of the bag.

La cinématique est cependant complexe et non transposable au problème spécifique à résoudre, c'est-à-dire l'élimination du liquide dans des cornes d'un coussin souple disposé sur une poutre support, les coins inférieurs du coussin débordant par rapport à la poutre en tendant vers le bas.The kinematics are however complex and cannot be transposed to specific problem to be solved, that is to say the elimination of the liquid in the horns of a flexible cushion disposed on a support beam, the lower corners of the cushion projecting relative to the beam while tending downward.

La présente invention a pour objet de remédier à ces inconvénients des dispositifs de l'art antérieur.The object of the present invention is to remedy these drawbacks of the devices of the prior art.

Conformément à l'invention on propose à cette fin un dispositif du type décrit en exergue dans lequel les mâchoires comportent chacune un flasque concave qui coopère avec une surface de contre appui plane ou elle-même constituée d'un flasque identique, lesdits flasques concaves étant articulés à rotation sur chaque mâchoire de manière à ce que lors de l'avancement de celle-ci vers le coin à souder le point de contact du flasque sur le coin du sachet se déplace progressivement vers le haut, de manière à chasser progressivement le liquide contenu dans ledit coin vers le haut, c'est-à-dire l'intérieur du sachet, chaque pince étant constituée d'une paire de mâchoires mobiles en translation plane l'une par rapport à l'autre, et chaque flasque étant sollicité en pression tendant à les maintenir en saillie par un moyen élastique.In accordance with the invention, a device of the type described in detail is proposed for this purpose in which the jaws each comprise a concave flange which cooperates with a flat counter surface or itself consisting of an identical flange, said concave flanges being articulated in rotation on each jaw so that as it advances towards the corner to be welded the point of contact of the flange on the corner of the sachet gradually moves upward, so as to gradually expel the liquid contained in said upward corner, that is to say inside the bag, each clamp consisting of a pair of jaws movable in plane translation relative to each other, and each flange being biased in pressure tending to keep them projecting by an elastic means.

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

  • la figure 1 est une vue en perspective d'une pince pour la mise en oeuvre du procédé selon l'invention, au repos ;
  • la figure 2 est une vue identique à celle de la figure 1, en position finale de soudure.
The invention will be better understood by means of the description given below of an embodiment given by way of nonlimiting example, with reference to the appended drawings in which:
  • Figure 1 is a perspective view of pliers for the implementation of the method according to the invention, at rest;
  • Figure 2 is a view identical to that of Figure 1, in the final welding position.

Le dispositif se compose par exemple d'une paire de mâchoires (100,101) mobiles en translation dans un plan horizontal l'une par rapport à l'autre, par exemple sous l'action de vérins tels que (102).The device consists for example of a pair of jaws (100, 101) movable in translation in a horizontal plane with respect to each other, for example under the action of jacks such as (102).

Sur leurs faces frontales, celles-ci sont munies de moyens de soudure (103,104) en eux mêmes connus et qui ne seront pas décrits plus en détail.On their front faces, these are provided with welding means (103, 104) in themselves known and which will not be described in more detail.

Sur la face inférieure de chaque mâchoire est rapporté un flasque (105,106) articulé à rotation sur celle-ci selon un axe (107,108).On the underside of each jaw is attached a flange (105,106) articulated in rotation thereon along an axis (107,108).

Les flasques sont sollicités en pression tendant à les maintenir en saillie, en direction l'un de l'autre, par un moyen élastique tel que ressort (109) ou ressort-lame (110).The flanges are stressed under pressure tending to keep them projecting, in the direction of one another, by an elastic means such as spring (109) or leaf spring (110).

Lors de la mise en oeuvre du procédé décrit dans le brevet principal, un coin du sachet est disposé entre les deux flasques et, respectivement, les mâchoires. Il est à ce stade rempli de liquide.During the implementation of the method described in the main patent, a corner of the bag is disposed between the two flanges and, respectively, the jaws. It is at this stage filled with liquid.

Pour chasser ce liquide on rapproche les deux mâchoires l'une de l'autre, qui viennent alors en contact par les extrémités basses (111,112) de leurs flasques respectifs. Au fur et à mesure du rapprochement des mâchoires (100,101), le point de contact entre les flasques remonte vers le haut, chassant ainsi le liquide du coin qui y est inséré.To expel this liquid, the two jaws are brought closer to one another, which then come into contact through the lower ends (111, 112) of their respective flanges. As the jaws (100,101) come closer, the point of contact between the flanges rises upwards, thus expelling the liquid from the corner which is inserted therein.

En position finale, représentée figure 2, les flasques sont en contact par leurs extrémités supérieures (113,114). Le liquide est totalement chassé et la soudure est opérée par les mâchoires.In the final position, shown in Figure 2, the flanges are in contact with their upper ends (113,114). The liquid is completely expelled and the welding is carried out by the jaws.

Bien entendu, on peut apporter un certain nombre de variantes. Ainsi, par exemple, l'une des mâchoires peut comporter seulement une aile plane, perpendiculaire au plan horizontal des mâchoires, l'autre mâchoire comportant un flasque tel que décrit précédemment.Of course, a number of variants can be made. Thus, for example, one of the jaws may comprise only a flat wing, perpendicular to the horizontal plane of the jaws, the other jaw comprising a flange as described above.

Claims (1)

1. Device for forming the bottom of a bag of flexible synthetic material from a cushion of synthetic material filled with liquid and to give it stability, comprising a supporting beam which has a width smaller than the width of the cushion and on which the cushion is arranged so that the two lower corners of the cushion project with respect to the beam while tending downwardly, with application on each side of the beam of the jaw (100, 101) of a gripper of which the pressing power exerted flushes the liquid contained in the aforementioned two corners, then welding along two lines which will give stability to the bag, thus defining two ears corresponding to the corners, characterised in that the jaws each comprise a concave cheek (105-106) which co-operates with an opposing surface which is plane or is itself constituted by an identical cheek, said concave cheeks being rotatably articulated on each jaw such that, during the advance of the jaw toward the corner to be welded, the point of contact of the cheek on the corner of the bag travels progressively upwardly so as progressively to flush the liquid contained in said corner upwardly, that is toward the interior of the bag, each gripper consisting of a pair of jaw (100, 101) capable of planar translation relative to one another and each cheek being urged by pressure tending to keep them jutting out by an elastic means (109, 110).
EP88901850A 1987-02-19 1988-02-09 Process for forming the base of a bag in flexible synthetic material, and device for implementing said process Expired - Lifetime EP0303654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88901850T ATE69776T1 (en) 1987-02-19 1988-02-09 METHOD OF FORMING THE BOTTOM OF A BAG OF FLEXIBLE THERMOPLASTIC MATERIAL AND DEVICE FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8702436 1987-02-19
FR8702436A FR2611182B2 (en) 1983-11-15 1987-02-19 PROCESS FOR FORMING THE BOTTOM OF A BAG IN FLEXIBLE SYNTHETIC MATERIAL AND DEVICE FOR IMPLEMENTING SAME

Publications (2)

Publication Number Publication Date
EP0303654A1 EP0303654A1 (en) 1989-02-22
EP0303654B1 true EP0303654B1 (en) 1991-11-27

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EP88901850A Expired - Lifetime EP0303654B1 (en) 1987-02-19 1988-02-09 Process for forming the base of a bag in flexible synthetic material, and device for implementing said process

Country Status (7)

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US (1) US5047105A (en)
EP (1) EP0303654B1 (en)
JP (1) JPH01502259A (en)
AT (1) ATE69776T1 (en)
CA (1) CA1274223A (en)
DE (1) DE3866467D1 (en)
WO (1) WO1988006125A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329553A (en) * 1956-11-27 1963-06-14 Machine intended to hermetically close packages filled with liquid or pasty material, formed by successive sections of a tubular body of thermoplastic material
US4369611A (en) * 1980-07-07 1983-01-25 Rexham Corporation Top heat sealing unit for pouches
FR2554783B1 (en) * 1983-11-15 1986-08-22 Vittel Eaux Min PROCESS FOR FORMING THE BOTTOM OF U

Also Published As

Publication number Publication date
CA1274223A (en) 1990-09-18
ATE69776T1 (en) 1991-12-15
EP0303654A1 (en) 1989-02-22
DE3866467D1 (en) 1992-01-09
WO1988006125A1 (en) 1988-08-25
JPH01502259A (en) 1989-08-10
US5047105A (en) 1991-09-10

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