FR2605289A1 - METHOD FOR CLOSING AN END OF A TUBE AND APPARATUS FOR IMPLEMENTING SAID METHOD - Google Patents

METHOD FOR CLOSING AN END OF A TUBE AND APPARATUS FOR IMPLEMENTING SAID METHOD Download PDF

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Publication number
FR2605289A1
FR2605289A1 FR8614556A FR8614556A FR2605289A1 FR 2605289 A1 FR2605289 A1 FR 2605289A1 FR 8614556 A FR8614556 A FR 8614556A FR 8614556 A FR8614556 A FR 8614556A FR 2605289 A1 FR2605289 A1 FR 2605289A1
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France
Prior art keywords
tube
folding
closure
closing
fold
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Granted
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FR8614556A
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French (fr)
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FR2605289B1 (en
Inventor
Antero Makilaakso
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Printal Oy
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Printal Oy
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General 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
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining 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
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0324—Reforming or reshaping the joint, e.g. folding over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General 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
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43123—Closing the ends of squeeze tubes, e.g. for toothpaste or cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/72—General 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 structure of the material of the parts to be joined
    • B29C66/723—General 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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General 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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General 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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General 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
    • B29C66/814—General 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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General 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
    • B29C66/814—General 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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General 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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General 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
    • B29C66/816—General 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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General 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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/14—Closing collapsible or resilient tubes, e.g. for tooth paste, for lighter fuel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/71—General 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/004—Closing bags

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Package Closures (AREA)
  • Tubes (AREA)

Abstract

POUR FERMER L'EXTREMITE D'UN TUBE 1 CONSTITUE PAR UNE MATIERE PLASTIQUE OU PAR UN MATERIAU STRATIFIE FORME DE FEUILLES DE MATIERE PLASTIQUE ET D'ALUMINIUM, LE TUBE EST ENTRAINE, EN ETANT GUIDE, PAR UN CONVOYEUR 1, 3, 4 JUSQU'A UN DISPOSITIF DE PLIAGE 5, 6 OU IL EST REPLIE, PUIS EST FERME DANS UN DISPOSITIF DE FERMETURE 7, 8 PAR CHAUFFAGE, TOUT EN ETANT GUIDE ET ENTRAINE A UNE VITESSE CONSTANTE. APPLICATION NOTAMMENT AUX TUBES DE DENTIFRICE ET DE COSMETIQUESTO CLOSE THE END OF A TUBE 1 CONSTITUTED BY A PLASTIC MATERIAL OR BY A LAMINATED MATERIAL IN THE FORM OF PLASTIC AND ALUMINUM SHEETS, THE TUBE IS DRAWN, BY BEING GUIDED, BY A CONVEYOR 1, 3, 4 UNTIL HAS A FOLDING DEVICE 5, 6 WHERE IT IS FOLDED, THEN IS CLOSED IN A CLOSING DEVICE 7, 8 BY HEATING, WHILE BEING GUIDED AND DRIVEN AT A CONSTANT SPEED. APPLICATION IN PARTICULAR TO TOOTHPASTE AND COSMETIC TUBES

Description

Procédé pour fermer une extrémité d'un tube et appareil pour la mise enMethod for closing an end of a tube and apparatus for setting

oeuvre de ce procédéof this process

La présente invention concerne un procédé pour fer-  The present invention relates to a method for

mer l'extrémité d'un tube constitué en une matière plastique ou en un matériau stratifé comprenant des couches formées de  end of a tube made of a plastic material or a layered material comprising layers formed of

feuilles de matière plastique et des couches formées de feuil-  plastic sheets and layers formed of

les d'aluminium, ledit tube étant utilisé en tant que conte-  aluminum, said tube being used as a

neur pour le stockage et l'application par exemple d'une pâte de dentifrice ou de substances cosmétiques, et un appareil  neur for the storage and application, for example, of a paste of toothpaste or cosmetic substances, and a device

pour la mise en oeuvre de ce procédé.  for the implementation of this method.

Actuellement, il existe trois types principaux con-  Currently, there are three main types

nus de tubes, utilisés pour le stockage et l'application d'une  bare tubes, used for the storage and application of a

pâte dentifrice ou de produits cosmétiques et analogues.  toothpaste or cosmetics and the like.

Antérieurement un type de tube utilisé communément était réa-  Previously a type of tube commonly used was

lisé en un métal léger, notamment de l'aluminium. On fermait habituellement l'extrémité du tube en formant plusieurs plis  made of a light metal, in particular aluminum. The end of the tube was usually closed by forming several folds

au niveau de ladite extrémité. Cependant un joint de fermetu-  at said end. However a seal of closure

re de ce type n'est pas suffisamment fiable, étant donné que le joint de fermeture de l'extrémité de tubes d'aluminium est  this type is not sufficiently reliable, since the end seal of the aluminum tube end is

souvent susceptible d'être endommagé en cours d'utilisation.  often susceptible to damage during use.

Un type de tube largement utilisé est le tube en matière plastique, dans lequel l'enveloppe est réalisée en une  A type of tube widely used is the plastic tube, in which the envelope is made in one

matière plastique élastique. Un tel tube présente comme avan-  elastic plastic material. Such a tube has the advantage

tage le fait que sa forme reste inchangée en cours d'utilisa-  that its shape remains unchanged during use.

tion. En raison de son aspect esthétique inchangé, ce type de tube convient particulièrement pour être utilisé en tant que  tion. Because of its unchanged aesthetic appearance, this type of tube is particularly suitable for use as a

conteneur de produits cosmétiques pour femmes.  container of cosmetics for women.

Un autre type usuel de tube habituellement utili-  Another common type of tube usually used is

sé est le tube stratifié, dans lequel l'enveloppe est consti-  se is the laminated tube, in which the envelope is

tuée en un matériau stratifié constitué par des couches alter-  killed in a layered material consisting of alternating layers

nées en forme de feuilles de matière plastique et de feuilles  born in the form of plastic sheets and leaves

d'aluminium. Contrairement au tube entièrement en matière plas-  aluminum. Unlike the tube made entirely of

tique, en raison des couches d'aluminium, le tube stratifié se déforme en cours d'utilisation. Les matières plastiques en général utilisées dans de tels tubes sont des polyoléfines, comme par exemple du polyéthylène ou du polypropylène à haute  Because of the aluminum layers, the laminated tube deforms during use. Plastics generally used in such tubes are polyolefins, such as polyethylene or polypropylene with high

pression ou à basse pression. On ferme habituellement l'ex-  pressure or low pressure. The ex-post is usually closed

trémité d'un tube en matière plastique ou d'un tube stratifié  tremity of a plastic tube or a laminated tube

en chauffant l'extrémité ouverte du tube, qui possède une for-  by heating the open end of the tube, which has a

me essentiellement circulaire ou elliptique, jusqu'à ce qu'el- le devienne molle, puis on comprime les faces du tube l'une contre l'autre de sorte qu'un joint de fermeture est réalisé  me essentially circular or elliptical, until it becomes soft, then the faces of the tube are compressed against each other so that a closing joint is achieved

entre ces éléments. La résistance d'un joint de fermeture réa-  between these elements. The resistance of a closure seal

lisé de cette manière est égale à la résistance à l'arrache-  in this way is equal to the resistance to tearing

ment de la feuille de matière plastique fermée sur elle-même  of the closed plastic sheet on itself

sur la face interne du tube. La solidité de ce joint de fer-  on the inside of the tube. The strength of this iron joint

meture est par conséquent insuffisante, compte tenu du fait  is therefore insufficient, given the fact that

que dans le cas o on le réalise avec les procédés plus ré-  that in the case where it is carried out with the most

cents de fabrication, le joint de fermeture longitudinal de l'enveloppe du tube résisterajusqu'au double de la pression  cent of manufacture, the longitudinal closure seal of the tube casing resistajusqu'au double the pressure

que le joint de fermeture de l'extrémité peut supporter.  that the closing seal of the end can support.

Avec le temps, le joint de fermeture d'extrémité du tube s'affaiblit par exemple sous l'effet de la corrosion  Over time, the end seal of the tube weakens for example under the effect of corrosion

provoquée par les facteurs tels que les substances aromati-  caused by factors such as aromatic substances

ques présentes dans le produit, tels que la pâte dentifrice, contenue dans le tube. Des essais ont montré que la solidité  present in the product, such as toothpaste, contained in the tube. Tests have shown that solidity

du joint de fermeture d'extrémité diminue de moitié par rap-  the end closure seal decreases by half

port à sa valeur initiale en l'espace de six mois. Des obser-  port to its initial value within six months. Observations

vations analogues à celles-ci ont naturellement créé un be-  similar to these have naturally created a need

soin d'examiner de plus près la structure du joint de ferme-  take a closer look at the structure of the closure joint.

ture d'extrémité. Afin de faciliter la compréhension de l'in-  extremity. In order to facilitate understanding of the

vention et des avantages qu'elle fournit, il est nécessaire  vention and the benefits it provides, it is necessary

d'expliquer les raisons pour lesquelles les joints de ferme-  to explain the reasons why

ture actuellement utilisés ne sont pas appropriés du point de  currently used are not appropriate for

vue durabilité.sustainability view.

Le joint de fermeture possède normalement une lon-  The closure seal normally has a length

gueur d'environ 5-10 mm. Le joint de fermeture est formé d'une manière uniforme et sa section transversale possède la forme d'une ligne droite. Si une pression est établie dans le tube,  approximately 5-10 mm. The closure seal is formed in a uniform manner and its cross section has the shape of a straight line. If a pressure is established in the tube,

les côtés du joint de fermeture tendent à s'écarter par arra-  the sides of the closure seal tend to move away by

chement, étant donné que la résistance du joint de fermeture est insuffisante pour empêcher ce phénomène. Avec le temps,  This is because the resistance of the closing seal is insufficient to prevent this phenomenon. With time,

les substances aromatiques mentionnées ci-dessus, qui corro-  the aromatic substances mentioned above, which

dent le joint de fermeture, contribuent également à écarter par arrachement les côtés du joint de fermeture. La déchirure progresse selon une forme elliptique en coupe jusqu'à ce qu'un  the closing seal, also help to tear away the sides of the seal. The tear progresses in an elliptical sectional shape until a

trou apparaisse dans le joint de fermeture d'extrémité du tube.  hole appears in the end seal of the tube.

Le but de la présente invention est de créer un  The object of the present invention is to create a

procédé pour fermer l'extrémité d'un tube en matière plasti-  method for closing the end of a plastic tube.

que ou d'un tube stratifié de sorte que le joint de fermeture possède une résistance supérieure à la déformation. Un autre but de l'invention est de créer un appareil pour la mise en oeuvre dudit procédé. Le procédé conforme à l'invention est  or a laminated tube so that the closure seal has superior resistance to deformation. Another object of the invention is to create an apparatus for implementing said method. The process according to the invention is

caractérisé en ce que l'extrémité ouverte ou l'une des extré-  characterized in that the open end or one of the

mités ouvertes du tube, comportant au moins une extrémité ou-  open half of the tube, having at least one end or-

verte est, tout en étant soumise à un guidage efficace conti-  green is, while being subject to effective continuous guidance

nu, pincée, repliée,puis fermée par chauffage de l'extrémité  naked, pinched, folded, then closed by heating the end

repliée au moins à partir de la face extérieure du pli et com-  folded at least from the outer face of the fold and

pression du pli contre le reste de l'extrémité du tube.  pleat pressure against the rest of the end of the tube.

Un mode d'exécution avantageux du procédé confor-  An advantageous embodiment of the process according to

me à l'invention est caractérisé en ce qu'on chauffe l'extré-  to the invention is characterized by heating the

mité du tube à partir des deux côtés pendant l'opération de fermeture.  mite the tube from both sides during the closing operation.

Un mode d'exécution avantageux du procédé confor-  An advantageous embodiment of the process according to

me à l'invention est caractérisé en ce qu'avant l'opération de fermeture, on découpe l'extrémité ouverte du tube avec une forme oblique de telle sorte que le côté de l'enveloppe, vers lequel l'extrémité doit être repliée, est plus court que  The invention is characterized in that prior to the closing operation, the open end of the tube is cut with an oblique shape such that the side of the envelope to which the end is to be folded, is shorter than

l'autre côté, ce qui a pour effet qu'après le pliage de l'ex-  the other side, which has the effect that after the folding of the

trémité, le pli possède une extrémité unie.  tremité, the fold has a united end.

Un autre mode d'exécution avantageux du procédé conforme à l'invention est caractérisé en ce que, avant le pliage, on découpe l'extrémité ouverte du tube avec une forme  Another advantageous embodiment of the process according to the invention is characterized in that, before folding, the open end of the tube is cut with a shape

oblique de telle manière que le côté de l'enveloppe, vers le-  oblique in such a way that the side of the envelope, towards-

quel l'extrémité doit être repliée, est nettement plus court que l'autre côté, ce qui a pour effet que, après le pliage et la fermeture de l'extrémité, la surface extérieure du pli  which the end is to be folded, is significantly shorter than the other side, which has the effect that, after folding and closing the end, the outer surface of the fold

est réunie à la surface de l'enveloppe du tube, qui est tour-  is joined to the surface of the tube shell, which is

née vers le pli.born towards the fold.

L'appareil pour la mise en oeuvre du procédé con- forme à l'invention est caractérisé en ce qu'il comporte un convoyeur qui transporte les tubes, placés de manière à être redressés avec leur extrémité ouverte tournée vers le haut,  The apparatus for carrying out the process according to the invention is characterized in that it comprises a conveyor which transports the tubes, placed so as to be straightened with their open end facing upwards,

jusqu'à un dispositif de pliage qui coude doublement l'extrë-  up to a folding device which elbow doubly the extreme

mité du tube, et un dispositif de fermeture comprenant au moins  of the tube, and a closure device comprising at least

un dispositif de chauffage et un dispositif de serrage.  a heating device and a clamping device.

Une forme de réalisation avantageuse de l'appa-  An advantageous embodiment of the apparatus

reil conforme à l'invention est caractérisée en ce qu'il com-  in accordance with the invention is characterized in that it

porte des dispositifs de refroidissement et d'estampage dis-  carries cooling and stamping devices

posés en aval du dispositif de fermeture.  placed downstream of the closure device.

Une autre forme de réalisation avantageuse de l'ap-  Another advantageous embodiment of the invention

pareil conforme à l'invention est caractérisée en ce que le convoyeur est constitué par une bande de caoutchouc mousse et  according to the invention is characterized in that the conveyor is constituted by a strip of foam rubber and

par une bande convoyeuse.by a conveyor belt.

Une autre forme de réalisation avantageuse de l'ap-  Another advantageous embodiment of the invention

pareil conforme à l'invention est caractérisée en ce que le  in accordance with the invention is characterized in that

dispositif de pliage comporte deux disques de pliage succes-  folding device comprises two successive folding disks-

sifs.sive.

Un joint de fermeture réalisé conformément à l'in-  A closing seal made in accordance with the

vention présente comme avantage le fait qu'une section trans-  This advantage has the advantage that a trans-

versale de l'extrémité du tube conserve toujours sa forme droi-  the end of the tube always retains its straight

te et qu'il ne se produit aucun arrachement, étant donné que  there is no break-off, since

les côtés opposés de l'enveloppe du tube ne peuvent pas s'écar-  opposite sides of the tube shell can not be

ter l'un de l'autre. Ceci est dû au fait qu'un autre joint de fermeture est formé à l'extérieur du tube entre le pli et la surface du tube. C'est pourquoi les substances aromatiques du produit contenu dans le tube ne peuvent pas pénétrer dans le joint de fermeture. Un joint de fermeture réalisé conformément à l'invention présente une résistance nettement meilleure à la déformation que des types connus de joint de fermeture, étant donné que sa résistance est égale à la résistance à la  from each other. This is due to the fact that another closure seal is formed outside the tube between the fold and the surface of the tube. This is why the aromatic substances of the product contained in the tube can not penetrate into the closure seal. A closure seal made in accordance with the invention has a significantly better resistance to deformation than known types of closure seal, since its strength is equal to the resistance to

traction du matériau stratifié lui-même.  pulling the laminate material itself.

Un autre avantage important, obtenu avec le pro-  Another important advantage obtained with the

cédé conforme à l'invention, tient au fait que l'ensemble de l'opération de fermeture est réalisé alors que les tubes se déplacent le long d'un trajet continu, dans la même direction,  according to the invention, is due to the fact that the entire closing operation is performed while the tubes move along a continuous path, in the same direction,

ce qui ne met en oeuvre aucun déplacement saccadé en va-et-  which does not imply any jerky displacement in va-et-

vient.comes.

D'autres caractéristiques et avantages de la pré-  Other features and advantages of the pre-

sente invention ressortiront de la description donnée ci-après  invention will be apparent from the description given hereinafter

prise en référence aux dessins annexés, sur lesquels: - la figure 1 représente une vueen plan, en coupe  reference is made to the accompanying drawings, in which: FIG. 1 shows a plan view, in section;

partielle, de l'appareil pour la mise en oeuvre du procédé con-  part of the apparatus for carrying out the process

forme à l'invention; - la figure 2 représente une coupe prise suivant la ligne II-II sur la figure 1; - la figure 3 représente une coupe prise suivant la ligne III-III sur la figure 1; - la figure 4 représente une coupe prise suivant la ligne IV-IV sur la figure 1; - la figure 5 représente une coupe prise suivant la ligne V-V sur la figure 1; - la figure 6 représente une coupe prise suivant la ligne VI-VI sur la figure 1; - la figure 7 représente une coupe prise suivant la ligne VII-VII sur la figure 1; - la figure 8 représente une coupe prise suivant la ligne VIII-VIII sur la figure 1; - la figure 9 représente une coupe prise suivant la ligne IX-IX sur la figure 1; - la figure 10 représente une vue en coupe d'un joint de fermeture connu de l'extrémité d'un tube; - la figure 11 représente une vue en coupe d'un joint de fermeture de l'extrémité d'un tube, réalisé à l'aide du procédé conforme à l'invention, moyennant l'utilisation de l'appareil pour la mise en oeuvre de ce procédé; et  form to the invention; - Figure 2 shows a section taken along the line II-II in Figure 1; - Figure 3 shows a section taken along the line III-III in Figure 1; - Figure 4 shows a section taken along the line IV-IV in Figure 1; - Figure 5 shows a section taken along the line V-V in Figure 1; - Figure 6 shows a section taken along the line VI-VI in Figure 1; - Figure 7 shows a section taken along the line VII-VII in Figure 1; - Figure 8 shows a section taken along the line VIII-VIII in Figure 1; - Figure 9 shows a section taken along the line IX-IX in Figure 1; - Figure 10 shows a sectional view of a known closure seal of the end of a tube; FIG. 11 represents a sectional view of a closure joint of the end of a tube, made using the method according to the invention, by means of the use of the apparatus for the implementation of this process; and

- la figure 12 représente une forme de réalisa-  FIG. 12 represents a form of embodiment

tion avantageuse de l'invention.advantageous embodiment of the invention.

Sur la figure 1, l'appareil mettant en oeuvre le procédé conforme à l'invention est illustré selon une vue en plan, en coupe partielle. L'appareil comporte des bandes de  In Figure 1, the apparatus implementing the method according to the invention is illustrated in a plan view, in partial section. The device has bands of

caoutchouc mousse 1, au moyen desquelles les tubes 2 sont en-  foam rubber 1, by means of which the tubes 2 are

traînés dans une position redressée, l'extrémité ouverte étant  trailed in an upright position, the open end being

dirigée vers le haut. A ce stade, les tubes ont déjà été rem-  directed upwards. At this stage, the tubes have already been replaced

plis avec la substance désirée, comme par exemple une pâte den-  folds with the desired substance, such as a dough

tifrice ou analogue. Lorsque les tubes pénètrEtdans l'espace étroit présent entre les deux bandes convoyeuses 3 disposées  tifrice or the like. When the tubes penetrate into the narrow space between the two conveyor belts 3 arranged

en vis-à-vis, l'extrémité supérieure de chaque tube est com-  facing each other, the upper end of each tube is

primée, à la suite de quoi les tubes 2 continuent à être en-  awarded, following which tubes 2 continue to be

traînés par les bandes convoyeuses 3 dans un dispositif de  dragged by conveyor belts 3 into a

pliage constitué par deux disques de pliage successifs 4, 5.  folding constituted by two successive folding discs 4, 5.

Le premier disque de pliage 4 coude l'extrémité du tube sur  The first folding disc 4 bends the end of the tube on

un angle de 90 par rapport au plan vertical, et le second dis-  an angle of 90 from the vertical plane, and the second

que de pliage 5 termine le pliage de la manière illustrée sur  that fold 5 terminates the folding as illustrated on

la figure 6. Lorsqu'il quitte le dispositif de pliage, le tu-  Figure 6. When leaving the folding device, the

be 2 comporte une extrémité doublement pliée.  be 2 has a doubly folded end.

Le tube est entraîné depuis le premier disque de  The tube is driven from the first disc of

pliage jusqu'au second disque de pliage, avec un guidage effi-  folding to the second folding disk, with effective guidance

cace de l'extrémité du tube dans la position représentée sur  the end of the tube in the position shown on

la figure 5. Ceci empêche l'extrémité coudée de se redresser.  Figure 5. This prevents the bent end from straightening.

D'une manière semblable, sous l'action d'un guidage efficace, le tube s'avance depuis le second disque de pliage 6 jusqu'à  In a similar way, under the action of an effective guiding, the tube advances from the second folding disc 6 to

un dispositif de fermeture constitué par deux courroies de fer-  a closing device consisting of two iron belts

meture 7 déplaçables, disposées en vis-à-vis l'une de l'autre  7 movable, arranged opposite each other

et agencées de telle sorte qu'elles glissent sur les disposi-  and arranged in such a way that they slide

tifs de chauffage 8 et serrent les extrémités des tubes. Pour  Heating rods 8 and tighten the ends of the tubes. For

maintenir les courroies de fermeture 7 en permanence en posi-  keep the closure belts 7 permanently in position

tion dans la direction verticale, le dispositif de fermeture est muni de fils 9 insérés dans lesdispositifs de chauffage 8 et  in the vertical direction, the closure device is provided with wires 9 inserted into the heating devices 8 and

fixés aux courroies de fermeture 7, par exemple par vulcanisa-  attached to the closure belts 7, for example by vulcanizing

tion. Les dispositifsde chauffage 8 sont munis de cartouches chauf-  tion. The heating devices 8 are provided with heat cartridges

fantes 10, & partir desquelles la chaleur est transmise par l'intermédiaire des dispositifs de chauffage et des courroies à  10, from which heat is transmitted via the heaters and belts to

l'extrémité repliée du tube devant être fermé. Alors que l'ex-  the folded end of the tube to be closed. Whereas the former

trémité du tube est chauffée, elle est également comprimée fer- mement au moyen des courroies de fermeture 7. On va expliquer de façon détaillée la structure des joints de fermeture ainsi obtenus, en référence aux figures 11 et 12. Conformément à  The end of the tube is heated, it is also compressed firmly by means of the closure belts 7. The structure of the closure joints thus obtained will be explained in detail with reference to FIGS. 11 and 12.

l'invention, il est également possible d'utiliser le disposi-  invention, it is also possible to use the

tif de fermeture comportant un seuldispositifde chauffage 8, au-  closure system having a single heating device 8,

quel cas il est préférable de le placer sur le côté, vers le-  which case it is better to place it on the side, towards the-

quel le tube ou l'extrémité du tube est plié.  which the tube or the end of the tube is bent.

En outre l'appareil peut être équipé de disques  In addition the device can be equipped with disks

de refroidissement et d'estampage 11 disposés en aval du dis-  of cooling and stamping 11 arranged downstream of the disc

positif de fermeture. A l'aide du disque d'estampage on peut par exemp; imprimer le numéro de fabrication sur le joint de fermeture. La figure 10 montre l'extrémité d'un tube muni d'un joint de fermeture réalisé au moyen du procédé utilisé le plus communément actuellement. Selon ce procédé, le joint  positive closure. With the aid of the stamping disc one can for example; print the manufacturing number on the seal. Figure 10 shows the end of a tube provided with a closure seal made by the most commonly used method currently. According to this method, the seal

de fermeture 12 est formé entre les côtés 13 et 14 de l'enve-  closure 12 is formed between the sides 13 and 14 of the housing.

loppe. Le joint de fermeture est formé par chauffage de l'ex-  Loppe. The closure seal is formed by heating the former

trémité du tube et forte compression des côtés du tube entre  tube end and strong compression of the sides of the tube between

les mâchoires de serrage à froid.cold clamping jaws.

La figure 11 montre un tube et un joint de ferme-  Figure 11 shows a tube and a seal of closure

ture réalisés conformément au procédé selon l'invention. Avant l'opération de fermeture, l'enveloppe 13, 14 est un tube muni d'une forme essentiellement circulaire en coupe. Conformément & l'invention, l'enveloppe est soit réalisée entièrement en une matière plastique, soit est du type stratifié en étant formée par des feuilles alternées de matière plastique et d'aluminium, placées les unes sur les autres. La plupart des matières plastiques avantageuses utilisables dans ce but sont  produced in accordance with the method according to the invention. Before the closing operation, the envelope 13, 14 is a tube provided with a substantially circular sectional shape. According to the invention, the envelope is either made entirely of a plastic material, or is of the laminate type being formed by alternating sheets of plastic and aluminum, placed one on top of the other. Most of the advantageous plastics that can be used for this purpose are

les polyoléfines, telles que le polyéthylène ou le polypro-  polyolefins, such as polyethylene or polypro-

pylène à basse pression et à haute pression. Dans le tube re-  pylene at low pressure and at high pressure. In the tube

présenté sur les figures 11 et 12, l'enveloppe est réalisée en un matériau stratifié comportant deux couches 15 formées  shown in FIGS. 11 and 12, the envelope is made of a laminated material comprising two layers 15 formed

de feuilles d'aluminium. Le nombre des couches utilisées for-  of aluminum sheets. The number of layers used

mées de feuilles d'aluminium est quelconque et ne limite en aucune manière l'invention. Il est avantageux de découper l'ex- trémité de l'enveloppe sous une forme légèrement oblique de manière à ce que l'enveloppe soit plus courte du côté vers  Aluminum foils are any and in no way limit the invention. It is advantageous to cut the end of the envelope in a slightly oblique shape so that the envelope is shorter on the worm side.

lequel l'extrémité doit être pliée. Ceci rend possible de réa-  which end must be bent. This makes it possible to

liser un joint de fermeture, dans lequel les extrémités des moitiés 13 et 14 de l'enveloppe sont de niveau. Le joint de fermeture 16 est réalisé entre les surfaces extérieures de la moitié 13 de l'enveloppe et la surface intérieure du pli. Le joint de fermeture 17 est réalisé dans le pli entre les deux moitiés 13 et 14 de l'enveloppe. Si cela est nécessaire, on  a closure seal, wherein the ends of the shell halves 13 and 14 are level. The closure seal 16 is formed between the outer surfaces of the half 13 of the envelope and the inner surface of the fold. The closure seal 17 is made in the fold between the two halves 13 and 14 of the envelope. If necessary,

peut également chauffer l'extrémité du tube à partir de l'au-  can also heat the end of the tube from the

tre côté de manière à former un joint d'étanchéité entre les moitiés 13 et 14 de l'enveloppe, avant le pli. C'est le cas des exemples des formes de réalisation représentées sur les figures. Cependant, pour ce qui concerne la durabilité du  side so as to form a seal between the halves 13 and 14 of the casing, before the fold. This is the case of the examples of the embodiments shown in the figures. However, as regards the sustainability of the

joint de fermeture d'extrémité, ceci n'est pas nécessaire.  end closure seal, this is not necessary.

Sur les figures 10-12, pour des questions techni-  In Figures 10-12, for technical questions

ques et en vue d'améliorer la lisibilité des figures, on a for-  and in order to improve the readability of the figures, it was

tement exagéré les dimensions du joint de fermeture. Par exem-  exaggerated the dimensions of the closure seal. For example

ple, sur la figure 11, la dimension L est égale à environ 4-  in FIG. 11, the dimension L is equal to about 4-

5 mm et la dimension S est égale à environ 1 mm. Dans les pro-  5 mm and the dimension S is equal to about 1 mm. In the pro-

portions réelles, le bord inférieur du pli n'est pas aussi  actual portions, the lower edge of the fold is not as

arrondi que ceci apparaît sur les figures 11 et 12, mais for-  rounded that this appears in Figures 11 and 12, but

me une arête vive.me a sharp edge.

La figure 12 montre une forme de réalisation avan-  Figure 12 shows a preferred embodiment of

tageuse de l'invention dans laquelle, avant le pliage, l'ex-  of the invention in which, prior to folding, the former

trémité de l'enveloppe 13, 14 a été découpée selon une forme oblique de telle sorte que, après pliage et fermeture, le bord extérieur 19 de la moitié 14 de l'enveloppe est réuni à la  the end of the envelope 13, 14 has been cut in an oblique shape so that, after folding and closing, the outer edge 19 of the half 14 of the envelope is joined to the

surface extérieure de la moitié 13 de l'enveloppe. Ceci amé-  outer surface of half 13 of the envelope. This is

liore l'aspect et en outre accroît la durabilité de l'extré-  the appearance and in addition increases the durability of the

mité fermée. Par ailleurs la structure de l'extrémité du tube est la même que dans la forme de réalisation représentée sur la figure 11, c'est-àdire lorsque les joints de fermeture 16,  closed. Moreover, the structure of the end of the tube is the same as in the embodiment shown in FIG. 11, that is to say when the closing seals 16,

17 et 18 sont réalisés par chauffage à partir des deux c8tés.  17 and 18 are made by heating from both sides.

Il est évident pour un spécialiste de la techni- que que la présente invention n'est pas limitée aux exemples des formes de réalisation présentées ci-dessus et que l'on peut apporter des modifications à l'invention, en restant dans  It is obvious to one skilled in the art that the present invention is not limited to the examples of the embodiments presented above and that modifications can be made to the invention, remaining within

le cadre de cette dernière.the framework of the latter.

Claims (10)

REVENDICATIONS 1. Procédé pour fermer l'extrémité d'un tube (2)  1. Method for closing the end of a tube (2) constitué en une matière plastique ou en un matériau strati-  consisting of a plastic material or a strati- fié comprenant des couches formées de feuilles de matière plas-  comprising layers formed of sheets of tique et des couches formées de feuilles d'aluminium, ledit tube étant utilisé en tant que conteneur pour le stockage et  and layers formed of aluminum foil, said tube being used as a container for storage and l'application par exemple d'une pâte dentifrice ou d'un pro-  the application of, for example, a toothpaste or duit cosmétique, caractérisé en ce que l'extrémité:ouverte ou l'une des extrémités ouvertes du tube (2), comportant -au moins une extrémité ouverte est, tout en étant soumise à un guidage efficace continu, pincée, repliée, puis fermée par chauffage de l'extrémité repliée au moins à partir de la face extérieure du pli et compression du pli contre le reste de  cosmetic device, characterized in that the open end or one of the open ends of the tube (2), comprising at least one open end, is subjected to continuous effective guidance, pinched, folded and then closed. by heating the folded end at least from the outer face of the fold and compressing the fold against the remainder of the l'extrémité du tube.the end of the tube. 2. Procédé selon la revendication 1, caractérisé en ce qu'on chauffe l'extrémité du tube (2) à partir des deux  2. Method according to claim 1, characterized in that the end of the tube (2) is heated from both côtés pendant l'opération de fermeture.  sides during the closing operation. 3. Procédé selon l'une des revendications 1 ou 2,  3. Method according to one of claims 1 or 2, caractérisé en ce qu'avant l'opération de fermeture, on décou-  characterized in that prior to the closing operation, one discovers pe l'extrémité ouverte du tube (2) avec une forme oblique de  eg the open end of the tube (2) with an oblique shape of telle sorte que le côté de l'enveloppe, vers lequel]'extré-  such that the side of the envelope, towards which mité doit être repliée, est plus court que l'autre côté, ce  must be folded back, is shorter than the other side, this qui a pour effet qu'après le pliage de l'extrémité, le pli pos-  which has the effect that after the folding of the end, the fold pos- sède une extrémité unie.sede a united end. 4. Procédé selon l'une des revendications 1 ou 2,  4. Method according to one of claims 1 or 2, caractérisé en ce que, avant le pliage, on découpe l'extrémi-  characterized in that before folding, the end té ouverte du tube (2) avec une forme oblique de telle maniè-  open end of the tube (2) with an oblique shape in such a way that re que le côté de l'enveloppe, vers lequel l'extrémité doit être repliée, est nettement plus court que l'autre côté, ce  re the side of the envelope, to which the end is to be folded, is significantly shorter than the other side, this qui a pour effet que, après le pliage et la fermeture de l'ex-  which has the effect that after the folding and closing of the former trémité, la surface extérieure (19) du pli est réunie à la  the outer surface (19) of the fold is joined to the surface de l'enveloppe du tube, qui est tournée vers le pli.  surface of the envelope of the tube, which is turned towards the fold. 5. Appareil pour la mise en oeuvre du procédé se-  5. Apparatus for implementing the method se- lon la revendication 1, utilisé pour former l'extrémité d'un tube (2) réalisé en une matière plastique ou en un matériau  1, used to form the end of a tube (2) made of a plastic material or a material stratifié comprenant par exemple des couches formées de feuil-  laminate comprising, for example, layers formed of les en aluminium et des couches en matière plastique, alter-  aluminum and plastic layers, alter- nées, ledit appareil comportant un convoyeur (1, 3, 4) ser-  the apparatus comprising a conveyor (1, 3, 4) serving vant à supporter les tubes,dont les extrémités ouvertes sont tournées vers le haut, un dispositif de pliage (5, 6) et un  to support the tubes, whose open ends are turned upwards, a folding device (5, 6) and a dispositif de fermeture (7, 8), caractérisé en ce que l'appa-  closure device (7, 8), characterized in that the reil est muni de moyens servant à guider efficacement les tu-  it is equipped with means to guide effectively the bes entre le convoyeur (1, 3, 4) et le dispositif de pliage  between the conveyor (1, 3, 4) and the folding device (5, 6) ainsi qu'entre le dispositif de pliage (5, 6) et le dis-  (5, 6) and between the folding device (5, 6) and the positif de fermeture (7, 8), et que le convoyeur, le disposi-  positive closure (7, 8), and that the conveyor, the tif de pliage et le dispositif de fermeture ainsi que lesdits moyens servant à réaliser un guidage efficace sont agencés de  the folding device and the closing device as well as said means for effecting effective guiding are arranged manière à convoyer les tubes (2) à travers l'ensemble de l'ap-  conveying the tubes (2) through the whole of the appli- pareil, à une vitesse essentiellement constante.  the same, at a substantially constant speed. 6. Appareil selon la revendication 5, caractérisé  Apparatus according to claim 5, characterized en ce que le convoyeur est constitué par une bande de caout-  in that the conveyor consists of a rubber band chouc mousse (1) et deux bandes convoyeuses (3, 4), l'extrémi-  foam (1) and two conveyor belts (3, 4), the end té ouverte du tube étant comprimée à plat entre les bandes con-  the open end of the tube being pressed flat between the voyeuses.voyeurs. 7. Appareil selon l'une des revendications 5 ou  Apparatus according to one of claims 5 or 5 6, caractérisé en ce que le dispositif de pliage est consti-  6, characterized in that the folding device is constituted tué par un disque de pliage (5) qui coude l'extrémité du tube (2) à 90 , un moyen de guidage efficace, qui déplace le tube en maintenant son extrémité dans la position coudée, et un autre disque de pliage (6), qui coude en supplément sur 90' l'extrémité déjà coudée, de sorte que l'extrémité du tube est  killed by a bending disc (5) which bends the end of the tube (2) at 90, an effective guiding means, which moves the tube holding its end in the bent position, and another bending disc (6) , which bends in addition on 90 'the end already bent, so that the end of the tube is doublement coudée.double bent. 8. Appareil selon la revendication 7, caractérisé en ce qu'un moyen de guidage efficace disposé entre le disque de pliage (6) et le dispositif de fermeture (7, 8) entraîne le tube (2), avec son extrémité doublement coudée, dans 'le  8. Apparatus according to claim 7, characterized in that an effective guiding means disposed between the folding disc (6) and the closing device (7, 8) drives the tube (2), with its end bent double, in the dispositif de fermeture.closure device. 9. Appareil selon l'une quelconque des revendica-  9. Apparatus according to any one of the claims tions 5 à 8, caractérisé en ce que le dispositif de fermeture est constitué par deux courroies de fermeture (7) disposées  5 to 8, characterized in that the closing device is constituted by two closure belts (7) arranged en vis-à-vis l'une de l'autre et constituant les moyens per-  vis-à-vis one another and constituting the means permitting mettant de comprimer les extrémités du tube (2), et par au  compressing the ends of the tube (2), and by moins un dispositif de chauffage (8) muni de cartouches chauf-  minus a heating device (8) equipped with heating cartridges fantes (10), à partir desquelles une chaleur est transmise aux extrémités du tube par l'intermédiaire des courroies de fer- meture.  fantes (10), from which heat is transmitted to the ends of the tube through the closure belts. 10. Appareil selon l'une quelconque des revendi-  Apparatus according to any of the claims cations 5 à 9, caractérisé en ce qu'il comporte des moyens de  cations 5 to 9, characterized in that it comprises means for refroidissement et d'estampage (11) disposés en aval du dis-  cooling and stamping (11) arranged downstream of the disc positif de fermeture (7, 8).positive closure (7, 8).
FR868614556A 1986-10-23 1986-10-20 PROCESS FOR CLOSING AN END OF A TUBE AND APPARATUS FOR CARRYING OUT SAID METHOD Expired - Fee Related FR2605289B1 (en)

Applications Claiming Priority (1)

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LU86632A LU86632A1 (en) 1986-10-23 1986-10-23 METHOD FOR CLOSING THE END OF A TUBE AND PLANT FOR APPLYING THE METHOD

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FR2605289A1 true FR2605289A1 (en) 1988-04-22
FR2605289B1 FR2605289B1 (en) 1991-12-13

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CH (1) CH671748A5 (en)
DE (1) DE3637589A1 (en)
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GB (1) GB2195949B (en)
LU (1) LU86632A1 (en)
NL (1) NL8602618A (en)

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FR2813818B1 (en) * 2000-09-14 2003-05-30 Solvay Automotive Fuel Systems MULTILAYER HOLLOW BODY, PROCESS FOR MANUFACTURING SUCH HOLLOW BODY AND COMPRESSION-BLOW MOLD
US20090017322A1 (en) * 2007-07-11 2009-01-15 Hayes Heather J Three dimensional molded thermoplastic article
FR2964025B1 (en) * 2010-08-25 2012-09-14 Mattress France METHOD OF SOLDING A MATTRESS COVER AND SYSTEM USING THE METHOD
DE102022109695A1 (en) * 2022-04-21 2023-10-26 Iwk Verpackungstechnik Gmbh Tube and method for closing a tube

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19852520A1 (en) * 1998-10-08 2000-04-20 Weckerle Gmbh Tube closure unit for double-walled tube filling machine, has jaws coated with silicon rubber or heat-resistant, deformable plastic, which press tube ends together during hot welding or adhesion

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BE905618A (en) 1987-02-16
DE3637589A1 (en) 1988-05-05
FR2605289B1 (en) 1991-12-13
NL8602618A (en) 1988-05-16
GB2195949B (en) 1990-11-21
CH671748A5 (en) 1989-09-29
LU86632A1 (en) 1987-04-02
GB8624669D0 (en) 1986-11-19
GB2195949A (en) 1988-04-20

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