BE496745A - - Google Patents

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Publication number
BE496745A
BE496745A BE496745DA BE496745A BE 496745 A BE496745 A BE 496745A BE 496745D A BE496745D A BE 496745DA BE 496745 A BE496745 A BE 496745A
Authority
BE
Belgium
Prior art keywords
ribbons
thermoplastic material
machine according
endless
rollers
Prior art date
Application number
Other languages
English (en)
Publication of BE496745A publication Critical patent/BE496745A/fr

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/245Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/03After-treatments in the joint area
    • B29C66/034Thermal after-treatments
    • B29C66/0342Cooling, e.g. transporting through welding and cooling zone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/347General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B29C66/81812General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83421Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/242Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved by contact, i.e. a heated tool being brought into contact with the welding tool and afterwards withdrawn from it

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description


   <Desc/Clms Page number 1> 
 



  SOCIETE ANONYME MAISON.HENRY CORNET, résidant à BRUXELLES. 



  MACHINE A SOUDER A CHAUD DES FEUILLES DE MATIERE THERMOPLASTIQUE. 



   La présente invention a pour objet une machine simple et peu coû- teuse permettant de souder entre elles par la chaleur des feuilles de matière thermoplastique comme le polyéthylène, sans éprouver les inconvénients ré- sultant de l'adhérence de la matière thermoplastique aux pièces métalliques chauffantes utilisées pour la porter à la température de soudure. 



   Suivant l'invention, cette machine comporte deux rubans métalli- ques sans fin guidés et entraînés de manière que deux brins adjacents de ces rubans sans fin se déplacent parallèlement à la même vitesse,et des dispositifs de chauffage et de refroidissement par lesquels ces deux brins des rubans métalliques sans fin mobiles sont chauffés sur une partie de leur parcours et ensuite refroidis sur une partie suivante de leur parcours.

   Les feuilles ou épaisseurs de matière thermoplastique à souder entre elles sont introduites entre les brins chauffés des rubans métalliques, au contact des- quels la matière thermoplastique est portée à la température de soudure et elles sont entraînées par les rubans dans la zone de refroidissement où la matière thermoplastique soudée reprend sa consistance normale et cesse d'adhérer aux rubans' refroidis, avant d'être dégagée de ceux-ci. L'invention trouve notamment une application avantageuse à la fermeture hermétique par soudure d'emballages en polyéthylène et matières thermoplastiques analogues, tels que les sachets pour l'emballage de produits alimentaires. 



   Afin que l'invention soit bien comprise, on en décrira ci-après une forme d'exécution représentée schématiquement, à titre   d'exemple,   au dessin annexé, dans lequel : 
Fig. 1 est une vue d'ensemble de la machine à souder, en perspec- tive, et 
Fig. 2 une vue de détail des rubans métalliques, en coupe trans- versale . 



   Dans cet exemple, les deux rubans métalliques sans fin 1 et 2 sont superposés et passent sur des galets 3, 3' et 4,   4' à   axes horizontaux, por- tés par des montants espacés 5, 6 sur -Lui socle 7. 

 <Desc/Clms Page number 2> 

 



   Les galets 3, 4 sont moteurs et chauffants, étant à cet effet mis en rotation par un mécanisme approprié contenu dans un boîtier 8 et munis d'un chauffage par résistances électriques ou autre, tandis que les galets 3',   4'   peuvent être de simples galets de renvoi, fous sur leurs axes. Tournant en sens inverses, les galets 3, 4 entraînent les rubans 1, 2 dans le sens des flèches, de façon que les brins adjacents et parallèles 1', 2' des rubans se déplacent dans le même sens,de gauche à droite sur la Fig. 1, et à la même vitesse. Ces brins 1', 2', passent entre deux rampes de refroidissement 9, 10 qui soufflent sur eux de l'air froid ou un autre fluide réfrigérant, de telle sorte que le métal des rubans, chauffé en passant sur les galets chauf- fants 3, 4 est refroidi progressivement avant d'atteindre les poulies 3', 4'. 



   Il se comprend dès lors que si l'on introduit au point a, entre les brins 1', 2' en mouvement, les épaisseurs de matière thermoplastique à souder, par exemple les lèvres d'un sachet d'emballage, la chaleur des galets 3, 4 transmise par le métal des rubans, porte la matière thermoplastique à la température de soudure. A cette température, la matière thermoplastique adhère au métal des rubans, mais il ne peut en résulter aucun inconvénient puisqu'elle est entraînée par ceux-ci et demeure en contact avec le métal pen- dant tout le parcours entre les galets 3, 4 et les galets 3', 4'. Le refroi- dissement du métal par le fluide réfrigérant des rampes 9, 10 entraîne celui. de la matière plastique qui se décolle des brins 1', 2' en reprenant son é- tat solide et sort de la machine en b, parfaitement soudée. 



   On remarquera que grâce à l'emploi des rubans métalliques succes- sivement chauffés et refroidis, avec lesquels la matière thermoplastique res- te en contact pendant tout le processus de soudure, la température de sou- dure n'est plus critique à quelques degrés près, la soudure se faisant du moment que le point de fusion de la matière est atteint ou dépassé tandis que la matière cesse d'adhérer aux rubans dès que ceux-ci sont suffisamment refroidis. 



   Comme le montre le dessin, et particulièrement la Fig. 2, la lar- geur des rubans 1, 2 est de préférence supérieure de plusieurs millimètres à celle de la jante des galets chauffants 3, 4 et le bord 1x, 2X des rubans tourné vers l'objet en matière thermoplastique 11 dont la partie à souder 11' est engagée entre les brins 1', 2', se trouve en porte-à-faux sur ces galets 3, 4.

   Ce bord en porte-à-faux est chauffé moins fortement par les galets 3, 4 que la partie des rubans qui est en contact direct avec ces galets   et,   par conséquent, la matière thermoplastique pincée entre les bords en porte- à-faux est portée à moins haute température que la partie à souder de cette matière et reste solide, donnant aux rubans une bonne prise pour transpor- ter l'objet en matière thermoplastique à travers la machine, sans qu'une déchirure au niveau de la soudure soit à craindre. 



   Bien entendu, l'invention n'est pas limitée à la forme d'exécu- tion et aux détails de réalisation qui ont été décrits et représentés à titre   d'exemple,   et on ne sortirait pas de son cadre en y apportant des mo- difications. 



   REVENDICATIONS. 



   1.- Machine à souder à chaud des feuilles de matière thermoplas- tique, notamment de polyéthylène, caractérisée en ce qu'elle comporte deux rubans métalliques sans fin, ou l'équivalent, qui sont guidés et entraînés de manière que deux brins adjacents de ces rubans se déplacent parallèle- ment à la même vitesse, et des dispositifs de chauffage et de refroidissement par lesquels ces deux brins adjacents sont chauffés sur une partie de leur parcours et refroidis sur une partie suivante de leur parcours, les feuil- les ou épaisseurs de matière thermoplastique à souder étant pincées entre les dits brins des rubans et entraînées par ceux-ci le long de ce parcours.

Claims (1)

  1. 2. - Machine suivant la revendication 1, caractérisée en ce que les dispositifs de chauffage sont constitués par des galets chauffants sur lesquels passent les rubans sans fin, et les dispositifs de refroidissement par des rampes de soufflage d'air ou autre fluide réfrigérant, placées sur le parcours des brins adjacents des rubans sans fin. <Desc/Clms Page number 3>
    3.- Machine suivant la revendication 1, caractérisée en ce que le bord des rubans tourné vers l'objet en matière thermoplastique dont la partie à souder est pincée entre les brins adjacents des rubans, est chauffé moins fortement que le corps des rubans.
    4.- Machine suivant les revendications 2 et 3, caractérisée en ce que les rubans ont une largeur plus grande que la jante des galets chauf- fants et dépassent ceux-ci de façon que les rubans aient un bord en porte-à- faux du côté de l'objet à souder.
    5a- Machine suivant la revendication 2. caractérisée en ce que les galets chauffants sont en même temps moteurs et entraînent par friction les rubans métalliques sans fin.
    6.- Machine à souder à chaud des feuilles de matière thermoplas- tique, en substance comme décrit ci-dessus avec référence au dessin annexé. en annexe 1 dessin.
BE496745D BE496745A (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084474B (de) * 1956-05-16 1960-06-30 Plax G M B H Deutsche Verfahren und Vorrichtung zum fortlaufenden Zusammenfuegen von Einzelbahnen aus thermoplastischem Kunststoff
DE1090503B (de) * 1955-10-28 1960-10-06 Windmoeller & Hoelscher Vorrichtung zum Herstellen von Flach- und Seitenfaltenbeuteln aus mit einem thermoplastischen UEberzug versehenem Papier od. dgl.
DE1105602B (de) * 1959-03-18 1961-04-27 Norddeutsche Seekabelwerke Ag Verfahren und Vorrichtung zum Zuschweissen eines schlauchfoermigen Netzes aus thermoplastischem Kunststoff bei der Herstellung von Beuteln u. dgl.
DE1223532B (de) * 1962-09-15 1966-08-25 Heimbach Gmbh Thomas Josef Kontinuierlich arbeitende Kunststoffolien-Schweissmaschine
FR2559710A1 (fr) * 1984-02-22 1985-08-23 Contrapac Procede et dispositif pour conserver la planeite des bordures libres en contact de feuilles soudees qui constituent une bande continue a alveoles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090503B (de) * 1955-10-28 1960-10-06 Windmoeller & Hoelscher Vorrichtung zum Herstellen von Flach- und Seitenfaltenbeuteln aus mit einem thermoplastischen UEberzug versehenem Papier od. dgl.
DE1084474B (de) * 1956-05-16 1960-06-30 Plax G M B H Deutsche Verfahren und Vorrichtung zum fortlaufenden Zusammenfuegen von Einzelbahnen aus thermoplastischem Kunststoff
DE1105602B (de) * 1959-03-18 1961-04-27 Norddeutsche Seekabelwerke Ag Verfahren und Vorrichtung zum Zuschweissen eines schlauchfoermigen Netzes aus thermoplastischem Kunststoff bei der Herstellung von Beuteln u. dgl.
DE1223532B (de) * 1962-09-15 1966-08-25 Heimbach Gmbh Thomas Josef Kontinuierlich arbeitende Kunststoffolien-Schweissmaschine
FR2559710A1 (fr) * 1984-02-22 1985-08-23 Contrapac Procede et dispositif pour conserver la planeite des bordures libres en contact de feuilles soudees qui constituent une bande continue a alveoles

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