EP2878546B1 - Method for assembling tubular bodies made of cardboard material with a sealing structure - Google Patents

Method for assembling tubular bodies made of cardboard material with a sealing structure Download PDF

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Publication number
EP2878546B1
EP2878546B1 EP14194130.2A EP14194130A EP2878546B1 EP 2878546 B1 EP2878546 B1 EP 2878546B1 EP 14194130 A EP14194130 A EP 14194130A EP 2878546 B1 EP2878546 B1 EP 2878546B1
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EP
European Patent Office
Prior art keywords
sealing structure
tubular body
peripheral strip
sealing
strip
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EP14194130.2A
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German (de)
French (fr)
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EP2878546A1 (en
Inventor
Guillaume Sireix
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Classifications

    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/0018—Multiple-step processes for making flat articles ; Making flat articles the articles being pull-tap closure discs for bottles, jars or like containers
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/0043—Multiple-step processes for making flat articles ; Making flat articles the articles being box parts not otherwise provided for
    • B31D1/005—Multiple-step processes for making flat articles ; Making flat articles the articles being box parts not otherwise provided for making bottoms or caps
    • 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
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/26—Opening arrangements or devices incorporated in, or attached to, containers
    • B65D3/261—Opening arrangements or devices incorporated in, or attached to, containers the opening arrangement being located in the container side wall
    • B65D3/262—Opening arrangements or devices incorporated in, or attached to, containers the opening arrangement being located in the container side wall forming a circumferential line of weakness
    • 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
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0022—Making boxes from tubular webs or blanks, e.g. with separate bottoms, including tube or bottom forming operations
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/814—Applying closure elements to blanks, webs or boxes
    • B31B50/8144—Applying hook-and-loop-type fasteners

Definitions

  • the present invention relates to the field of tubular packaging, comprising a rigid tubular body, that is to say a solid body consisting of a portion of a cylinder, portion limited by two parallel planes intersecting the generatrices of the cylinder, made of a cardboard material, a bottom and / or a lid, and a safety membrane, sealed to the tubular body, these packings being intended to contain solid products in divided forms, such as powders, grains, granules, fibers, chips, or products in liquid form or in pasty form.
  • the tubular packagings concerned are both circular packs and tubular packings of non-circular section, for example rectangular or oval packs.
  • the tubular packaging concerned is both the actual cardboard packaging, the packaging comprising a tubular body of cardboard material but a lid and / or a bottom of metal material or synthetic material.
  • the present invention more particularly relates to a method of manufacturing packages comprising a tubular body made of one or more layers of a cardboard material and an obturating structure, forming a security membrane of the package, assembled to the tubular body so waterproof.
  • cardboard packaging usually refers to packages of which 90 to 98% by weight are made of cellulosic materials.
  • This type of packaging comprises, in addition to layers of cellulosic materials, metal layers or coatings, such as aluminum, or synthetic, associated with cellulosic materials to form a composite surface material.
  • metal or synthetic materials are, according to a terminology generally accepted in the art, a “barrier material”, isolating the product stored inside the packaging of the external environment, for example to prevent oxidation, drying out, or vis-à-vis pollutants.
  • Synthetic layers or coatings may also play an essential sealing role between two parts of the package during its manufacture; in this case they are generally referred to as "reactive barrier material".
  • a safety membrane aluminum and film (s) seal (s), aluminum and varnish sealer, paper and aluminum and film (s) sealant (s), paper barrier film (them: PET metallized, PET SIOX, PVDC, etc ...) and sealing film (s).
  • the materials used must be compatible for sealing with the inner wall of the tube.
  • the membrane can be printed and marked with spots to be cut and positioned perfectly centered in the tube.
  • the cut surface of the membrane is significantly larger than the cross-sectional area of a given tube.
  • it generates folds that are as many wells that let air and moisture and thus prevent a good seal of the assembly.
  • it is necessary to use very strong materials in order to use flanges at very high pressure, generally Hydraulic.
  • the range of usable materials is then almost limited to only aluminum with varnish. This poses price problems because aluminum is an expensive material, subject to great price variations.
  • it takes a lot of material to perform this forming operation, so it is disadvantageous in terms of material cost and final competitiveness.
  • the present invention has the primary objective of providing a method for using a wide range of materials to achieve the safety membrane.
  • the sealing of the membrane on the tube must be easily “peelable". To do this, it is generally used in the state of the art an attached tongue attached to the periphery of the safety membrane. Again, this limits the choice of materials for both the membrane and the barrier of the tube itself. Here again, material costs are not optimized.
  • the present invention also aims to provide a membrane for easy opening and reliable without being limited in the choice of materials as is the case of the processes of the state of the art mentioned above.
  • the invention proposes to facilitate the separation of the safety membrane during the first use, while decreasing the required tensile force, without altering the tightness of the membrane before this first use.
  • the French patent published under No FR 2,716,408 describes the manufacture of a tubular packaging of the above type.
  • the structure comprises a cover board made of cellulosic material and a safety membrane made of a cellulosic material coated with a barrier material. These two pieces are formed one after the other, in the form of cylindrical bowls by a punch shape through an outer die and engaged in one end of the tubular body.
  • the side walls of the two parts are assembled in a sealed manner with the inner wall of the tubular body. Then the wall of the tubular body is pre-cut along a peripheral line between the assembly areas of the two parts, so as to allow the opening of the lid carton without tearing the safety membrane.
  • the disadvantage of this process, specifically adapted to the assembly of cellulosic / cardboard materials is not to be applicable to a wide range of materials.
  • the present invention also aims to overcome this problem.
  • the invention also aims to provide a structure comprising a tubular body as mentioned above, provided with a safety membrane, structure on which can be formed and / or adapt a wide range of types of covers.
  • the document US6058682 discloses a method of manufacturing packages and a package according to the preamble of claim 6.
  • the present invention provides a method of manufacturing a package according to claim 1.
  • the invention also relates to a method of manufacturing a packaging according to claim 5.
  • said process is continuous, considered as a whole, and stepped step by step.
  • the shutter structure is cut from a strip, the advance of the strip by one step, a cutting sequence of a shutter structure in the strip and a flap operation of the tongue are slaved to the introduction of a shutter structure in a forming tool and a material assembly sequence.
  • the end of the tubular body located close to said closure structure undergoes a finish determined by the choice of the lid
  • the method according to the invention is implemented by means of a forming tool, comprising a sealing pad; said sealing pad comprises a sealing base of cross section conjugate to the cross section of the tubular body, the height of which is less than the width of the folding peripheral strip of the sealing structure, said sealing base being surmounted by a buffer body whose cross section is chosen so as not to come into contact with said shutter structure.
  • the sealing pad comprises a second sealing strip of cross section conjugated to the cross section of the tubular body, arranged at a distance from said sealing base determined by the width of said unsealed intermediate portion.
  • the invention also relates to a package according to claims 6 to 8.
  • the machines of the state of the art work at rates of 60-80 units, namely tubular bodies + membranes or lids, per minute.
  • the machine according to the invention can be advantageously adapted from a machine carrying the packaging two by two, as described in FR 1261400 , equipped with forming tools as defined above
  • the figure 1 shows a tubular body 1 associated with a safety membrane 2 of the "membrane-recess" type whose peripheral portion 3 covers the rim 4 of the tubular body 1.
  • the peripheral portion 3 houses numerous folds, sources of leaks.
  • a tongue 5 is glued or sealed on the safety membrane 2. This construction requires additional material and complex operations on the membrane.
  • the figure 2 shows the realization of a safety membrane 6 according to the invention, by stamping, from a strip of membrane material advancing under the stamping tool.
  • the tongue 7 come in one piece with the rest of the membrane, folded towards the center of the latter to form a solid.
  • the periphery of the membrane has 2 small concave zones to facilitate the subsequent detachment of the membrane from the inner wall of the tubular body.
  • the Figures 21a, 21b, 21c and 21d show alternative embodiments of shutter structures, flat. The skilled person will note that if the shapes of the tabs differ from the tongue 7 of the figure 2 , their proximal end extends laterally on both sides by two slight curvatures whose concavity is oriented towards the outside of the shutter structure.
  • the figure 3 shows the membrane 6, again in solid form, introduced into a forming tool 8 whose overall structure and mode of operation are known in the state of the art.
  • the figure 4 shows the descent of the sealing pad 9 and the clamping of the flanks 10 and the forming die 11.
  • the figure 5 shows the security membrane 6 formed in a bowl, the tongue 7 being bent at right angles by the sealing pad 9.
  • the sealing pad preferably has in its lower part an area thermally insulated by a protector not to stick to the tongue, by activation effect, on the sealing portion of the tongue during the output of the buffer.
  • the figure 6 and the figure 7 show the result of the operation: only the zone 13 of the peripheral band of the membrane 6 visualized by a thickened line is sealed to the tubular body 1.
  • the tongue 7 and the marginal zone of the membrane 6 are not secured to the body tubular 1.
  • the unsealed marginal area may in particular have a width of 1 to 3 mm.
  • the figure 8 shows the beginning of a detachment operation of the membrane 6 by a user who grasps the tongue 7.
  • the traction on the tongue 7 is distributed on either side of the base thereof thanks to the free marginal area .
  • the concavity of the marginal areas bordering the base of the tongue shown in particular on the figure 2 contributes to this distribution.
  • the safety membrane is positioned according to the invention at a distance from the flange 14 of the tubular body at a depth chosen by the manufacturer of the package according to the cover for this package. This distance makes it possible to perform a finishing operation of the rim, which in the majority of cases does not affect the membrane but may nevertheless include it.
  • a great many materials such as those mentioned above, can be used to make the membrane, the only condition being the compatibility with the internal barrier material of the tubular body with regard to heat sealing.
  • the figure 19 shows an embodiment of the shutter structure in which the peripheral band, symbolized by the dashed circle, is wider than in the embodiment shown in FIG. figure 2 and the concave cutting areas 18 on either side of the tongue are deeper.
  • the sealing pad intended to set up this closure structure in the tubular body has, in addition to the sealing base 12 of the embodiment shown by the figures 3-5 a second sealing strip 19 arranged at a distance from the sealing base determined by the width of the intermediate portion of the peripheral strip of the closure structure intended not to be sealed. The result of the operation is shown in particular on the figure 17a .
  • the circumferential band is sealed to the tubular body in its upper marginal zone 16 and in its lower zone 17, leaving free an intermediate zone, at which a cutout is made on the circumference of the tubular body, in a finishing operation which follows the hemming operation of the upper rim of the tubular body.
  • the Figures 18 and 18a show the detachment of the cover of the structure shown on the Figures 17 and 17a .
  • the skilled person will note that during the detachment of the cover the initial marginal area of the shutter structure is detached and remains integral with the lid while the intermediate portion, which is integral with the proximal portion of the tongue becomes the new upper marginal zone of the safety membrane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Packages (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Cartons (AREA)

Description

La présente invention concerne le domaine des emballages tubulaires, comprenant un corps tubulaire rigide, c'est à dire un corps solide constitué d'une portion d'un cylindre, portion limitée par deux plans parallèles coupant les génératrices du cylindre, fait d'un matériau cartonné, un fond et/ou un couvercle, ainsi qu'une membrane de sécurité, assemblée au corps tubulaire de manière étanche, ces emballages étant destinés à contenir des produits solides sous formes divisées, telles que poudres, grains, granulés, fibres, chips, ou encore des produits sous forme liquide ou sous forme pâteuse. Les emballages tubulaires concernés sont aussi bien les emballages de section circulaire que les emballages tubulaires de section non circulaire, par exemple des emballages de section rectangulaire ou ovale. Les emballages tubulaires concernés sont aussi bien les emballages en carton proprement dits, que les emballages comprenant un corps tubulaire en matériau cartonné mais un couvercle et/ou un fond en matériau métallique ou en matériau synthétique.The present invention relates to the field of tubular packaging, comprising a rigid tubular body, that is to say a solid body consisting of a portion of a cylinder, portion limited by two parallel planes intersecting the generatrices of the cylinder, made of a cardboard material, a bottom and / or a lid, and a safety membrane, sealed to the tubular body, these packings being intended to contain solid products in divided forms, such as powders, grains, granules, fibers, chips, or products in liquid form or in pasty form. The tubular packagings concerned are both circular packs and tubular packings of non-circular section, for example rectangular or oval packs. The tubular packaging concerned is both the actual cardboard packaging, the packaging comprising a tubular body of cardboard material but a lid and / or a bottom of metal material or synthetic material.

La présente invention concerne plus particulièrement un procédé de fabrication d'emballages comprenant un corps tubulaire fait d'une ou plusieurs couches d'un matériau cartonné et une structure obturante, formant une membrane de sécurité de l'emballage, assemblée au corps tubulaire de manière étanche.The present invention more particularly relates to a method of manufacturing packages comprising a tubular body made of one or more layers of a cardboard material and an obturating structure, forming a security membrane of the package, assembled to the tubular body so waterproof.

Le terme « emballage en carton » désigne usuellement des emballages dont 90 à 98% en poids sont constitués de matériaux cellulosiques. Ce type d'emballage comprend, en plus des couches de matériaux cellulosiques, des couches ou revêtements métalliques, tels que l'aluminium, ou synthétiques, associés aux matériaux cellulosiques pour former un matériau surfacique composite. Ces matériaux métalliques ou synthétiques constituent, selon une terminologie généralement acceptée dans la profession, un «matériau barrière », isolant le produit stocké à l'intérieur de l'emballage de l'environnement extérieur, par exemple pour éviter une oxydation, un dessèchement, ou vis-à-vis de polluants. Les couches ou revêtements synthétiques peuvent également jouer un rôle essentiel de scellage entre deux parties de l'emballage au cours de sa fabrication; dans ce cas elles sont généralement qualifiées de « matériau barrière réactivable ».The term "cardboard packaging" usually refers to packages of which 90 to 98% by weight are made of cellulosic materials. This type of packaging comprises, in addition to layers of cellulosic materials, metal layers or coatings, such as aluminum, or synthetic, associated with cellulosic materials to form a composite surface material. These metal or synthetic materials are, according to a terminology generally accepted in the art, a "barrier material", isolating the product stored inside the packaging of the external environment, for example to prevent oxidation, drying out, or vis-à-vis pollutants. Synthetic layers or coatings may also play an essential sealing role between two parts of the package during its manufacture; in this case they are generally referred to as "reactive barrier material".

La demande de brevet français du déposant publiée sous le numéro FR 2 986 514 décrit un procédé de fabrication d'un emballage substantiellement en carton, comprenant un corps tubulaire fait d'une ou plusieurs couches d'un matériau cartonné et une structure obturante complexe, assemblée au corps tubulaire de manière étanche, ladite structure obturante comprenant un carton-couvercle et une membrane de sécurité. Ce procédé comprend l'assemblage à plat de trois matériaux en feuilles ou bandes, à savoir

  • un matériau cellulosique revêtu d'au moins un matériau barrière réactivable sur sa face orientée vers ladite membrane de sécurité, constituant le dit carton-couvercle
  • une pièce de laminage agencée entre le dit carton couvercle et ladite membrane de sécurité, de forme conjuguée à la forme de l'ouverture du corps tubulaire, constituée de papier, ou de papier revêtu, sur sa face orientée vers le dit carton-couvercle, d'un matériau ayant des propriétés de scellage vis-à-vis du dit carton-couvercle, et
  • un matériau formant ladite membrane de sécurité, constitué d'un papier revêtu d'au moins un matériau barrière réactivable et pelable sur sa face non orientée vers ladite pièce de laminage.
The applicant's French patent application published under the number FR 2 986 514 discloses a method of manufacturing a substantially cardboard package, comprising a tubular body made of one or more layers of cardboard material and a complex sealing structure, joined to the tubular body in a sealed manner, said sealing structure comprising a carton cover and a safety diaphragm. This process involves the flat assembly of three sheet or strip materials, namely
  • a cellulosic material coated with at least one barrier material that can be reactivated on its side facing said safety membrane, constituting said carton-lid
  • a rolling member arranged between said cover board and said security membrane, of a shape conjugated to the shape of the opening of the tubular body, made of paper, or coated paper, on its side facing said cover-board, a material having sealing properties with respect to said carton-lid, and
  • a material forming said security membrane, consisting of a paper coated with at least one barrier material reactivatable and peelable on its non-facing side to said rolling member.

La demande de brevet FR 1261400 du déposant décrit un procédé de fabrication d'emballages constitués d'un corps tubulaire fait d'un matériau cartonné et d'une structure obturante complexe comprenant un carton-couvercle et une membrane de sécurité, ainsi qu'une machine mettant en oeuvre ce procédé, comprenant

  • l'approvisionnement d'une unité de scellage avec des corps tubulaires préformés, deux par deux, et avec des structures obturantes sous forme d'aplats, deux par deux, comprenant chacune une partie centrale de forme conjuguée à la forme de l'ouverture des corps tubulaires, entourée d'une partie périphérique rabattable suffisante pour assembler de manière étanche la structure obturante avec la paroi latérale interne d'un corps tubulaire,
  • l'introduction de paires de structures obturantes dans un outil de formage et leur mise en forme de cuvette
  • l'introduction, la pose et le scellage de toute la partie périphérique rabattue des cuvettes dans les corps tubulaire au moyen du dit outil de formage;
  • le transfert deux par deux des corps tubulaires assemblés aux structures obturantes à une unité de finition,
  • la prédécoupe de la paroi latérale des corps tubulaire et une prédécoupe partielle des couvercles selon une ligne périphérique,
  • au moins une opération de finition de l'extrémité de l'emballage portant la dite structure obturante.
La description de la demande de brevet FR 1261400 est incorporée ici, dans le présent texte, par cette citation de cette référence.The patent application FR 1261400 of the Applicant describes a method of manufacturing packages consisting of a tubular body made of a cardboard material and a complex sealing structure comprising a cardboard cover and a safety membrane, and a machine implementing this method including
  • supplying a sealing unit with preformed tubular bodies, two by two, and with closed structures in the form of flat areas, two by two, each comprising a central portion of shape conjugate to the shape of the opening of the tubular bodies, surrounded by a part sufficient folding device for sealingly assembling the sealing structure with the inner side wall of a tubular body,
  • the introduction of pairs of shuttering structures in a forming tool and their shaping bowl
  • introducing, laying and sealing the entire folded peripheral portion of the cuvettes in the tubular body by means of said forming tool;
  • the two-by-two transfer of the tubular bodies assembled to the shut-off structures to a finishing unit,
  • the precut of the side wall of the tubular body and a partial precut of the lids along a peripheral line,
  • at least one finishing operation of the end of the package carrying said shutter structure.
The description of the patent application FR 1261400 is incorporated here, in the present text, by this quotation from this reference.

De nombreux matériaux sont envisageables pour réaliser une membrane de sécurité: aluminium et film(s) scellant(s), aluminium et vernis scellant, papier et aluminium et film(s) scellant(s), papier film barrière (eux : PET métallisé, PET SIOX, PVDC, etc...) et film(s) scellant(s). Les matériaux utilisés doivent être compatibles pour le scellage avec la paroi interne du tube. Dans le cas de l'utilisation d'un complexe avec papier, la membrane peut être imprimée et repérée par des spots pour être découpée et positionnée parfaitement centrée dans le tube.Many materials are possible to make a safety membrane: aluminum and film (s) seal (s), aluminum and varnish sealer, paper and aluminum and film (s) sealant (s), paper barrier film (them: PET metallized, PET SIOX, PVDC, etc ...) and sealing film (s). The materials used must be compatible for sealing with the inner wall of the tube. In the case of the use of a paper complex, the membrane can be printed and marked with spots to be cut and positioned perfectly centered in the tube.

Avec les techniques connues dites "recess membrane" la surface découpée de la membrane est nettement plus grande que la surface transversale d'un tube donné. Lors du passage de l'état plat à l'état formé, on génère des plis qui sont autant de puits qui laissent passer l'air et l'humidité et empêchent donc une bonne étanchéité de l'ensemble. Pour palier à cela, dans l'état de la technique, il faut utiliser des matériaux très résistants afin d'utiliser des serre-flancs à très haute pression, généralement hydrauliques. La gamme des matériaux utilisables est alors quasi limitée au seul aluminium avec vernis. Ceci pose des problèmes de prix car l'aluminium est une matière chère, assujettie à de grandes variations de prix. De plus, il faut beaucoup de matière pour effectuer cette opération de formage, c'est donc désavantageux en terme de coût matière et de compétitivité finale. La présente invention a pour premier objectif d'offrir un procédé permettant d'utiliser un large éventail de matériaux pour réaliser la membrane de sécurité.With known techniques called "membrane recess" the cut surface of the membrane is significantly larger than the cross-sectional area of a given tube. During the transition from the flat state to the formed state, it generates folds that are as many wells that let air and moisture and thus prevent a good seal of the assembly. To overcome this, in the state of the art, it is necessary to use very strong materials in order to use flanges at very high pressure, generally Hydraulic. The range of usable materials is then almost limited to only aluminum with varnish. This poses price problems because aluminum is an expensive material, subject to great price variations. In addition, it takes a lot of material to perform this forming operation, so it is disadvantageous in terms of material cost and final competitiveness. The present invention has the primary objective of providing a method for using a wide range of materials to achieve the safety membrane.

De plus, pour avoir une ouverture facile, le scellage de la membrane sur le tube doit être aisément "pelable". Pour ce faire, on utilise en général dans l'état de la technique une languette rapportée fixée à la périphérie de la membrane de sécurité. Là aussi, cela limite le choix des matières aussi bien pour la membrane que pour la barrière du tube en lui même. Là aussi, les coûts matière ne sont pas optimisés. La présente invention a également pour objectif de réaliser une membrane permettant une ouverture facile et fiable sans être restreint dans le choix des matériaux comme c'est le cas des procédés de l'état de la technique mentionnés ci-dessus. L'invention se propose de faciliter la séparation de la membrane de sécurité lors du premier usage, tout en diminuant la force de traction nécessaire, sans altérer toutefois l'étanchéité de la membrane avant ce premier usage.In addition, to have an easy opening, the sealing of the membrane on the tube must be easily "peelable". To do this, it is generally used in the state of the art an attached tongue attached to the periphery of the safety membrane. Again, this limits the choice of materials for both the membrane and the barrier of the tube itself. Here again, material costs are not optimized. The present invention also aims to provide a membrane for easy opening and reliable without being limited in the choice of materials as is the case of the processes of the state of the art mentioned above. The invention proposes to facilitate the separation of the safety membrane during the first use, while decreasing the required tensile force, without altering the tightness of the membrane before this first use.

Le brevet français publié sous le No FR 2 716 408 , décrit la fabrication d'un emballage tubulaire du type ci-dessus. La structure comprend un carton-couvercle constitué de matériau cellulosique et une membrane de sécurité en matériau cellulosique revêtu d'un matériau barrière. Ces deux pièces sont formées l'une après l'autre, sous forme de cuvettes cylindriques par un poinçon de forme au travers d'une matrice extérieure et engagées dans une extrémité du corps tubulaire. Les parois latérales des deux pièces sont assemblées de manière étanche avec la paroi interne du corps tubulaire. Puis la paroi du corps tubulaire est prédécoupée selon une ligne périphérique située entre les zones d'assemblage des deux pièces, de façon à permettre l'ouverture du carton-couvercle sans arracher la membrane de sécurité. L'inconvénient de ce procédé, spécifiquement adapté à l'assemblage de matériaux cellulosiques/cartonnés est de ne pas pouvoir s'appliquer à une large gamme de matériaux. La présente invention a également pour objectif de pallier à ce problème. L'invention a aussi pour but de réaliser une structure comprenant un corps tubulaire tel que mentionné ci-dessus, muni d'une membrane de sécurité, structure sur laquelle on puisse former et/ou adapter un large éventail de types de couvercles.The French patent published under No FR 2,716,408 , describes the manufacture of a tubular packaging of the above type. The structure comprises a cover board made of cellulosic material and a safety membrane made of a cellulosic material coated with a barrier material. These two pieces are formed one after the other, in the form of cylindrical bowls by a punch shape through an outer die and engaged in one end of the tubular body. The side walls of the two parts are assembled in a sealed manner with the inner wall of the tubular body. Then the wall of the tubular body is pre-cut along a peripheral line between the assembly areas of the two parts, so as to allow the opening of the lid carton without tearing the safety membrane. The disadvantage of this process, specifically adapted to the assembly of cellulosic / cardboard materials is not to be applicable to a wide range of materials. The present invention also aims to overcome this problem. The invention also aims to provide a structure comprising a tubular body as mentioned above, provided with a safety membrane, structure on which can be formed and / or adapt a wide range of types of covers.

Le document US6058682 décrit un procédé de fabrication d'emballages et un emballage selon le préambule de la revendication 6. La présente invention propose un procédé de fabrication d'un emballage selon la revendication 1. L'invention concerne également un procédé de fabrication d'un emballaqe selon la revendication 5. L'homme du métier observera que le fait de ne pas sceller la zone marginale de la structure obturante, ou la partie intermédiaire mentionnée ci-dessus, diminue la surface scellée et de ce fait les plis susceptibles de provoquer un défaut d'étanchéité, et par conséquent ouvre l'éventail des matériaux utilisables pour la structure obturante. Par ailleurs, cela crée une portion de membrane sans contact avec le corps tubulaire à l'extrémité proximale de la languette, ce qui rend l'opération de « pelage» plus facile et plus fiable. Du fait que la zone marginale, en d'autres termes la partie supérieure de la membrane de sécurité de l'emballage fini n'est pas collée/scellée au corps tubulaire, la traction sur la languette provoque une déformation du haut de la membrane en répartissant les forces de traction de la languette sur une plus grande surface de la membrane, facilitant ainsi l'ouverture de la membrane.The document US6058682 discloses a method of manufacturing packages and a package according to the preamble of claim 6. The present invention provides a method of manufacturing a package according to claim 1. The invention also relates to a method of manufacturing a packaging according to claim 5. Those skilled in the art will observe that the fact of not sealing the marginal zone of the shutter structure, or the intermediate part mentioned above, decreases the sealed surface and therefore the folds likely to cause a leakage, and therefore opens the range of usable materials for the shutter structure. Furthermore, this creates a non-contact membrane portion with the tubular body at the proximal end of the tongue, making the "peel" operation easier and more reliable. Because the area marginale, in other words the upper part of the safety membrane of the finished package is not glued / sealed to the tubular body, traction on the tongue causes a deformation of the top of the membrane by distributing the traction forces the tongue on a larger surface of the membrane, thus facilitating the opening of the membrane.

Selon un mode d'exécution du procédé selon l'invention, le dit procédé est continu, considéré dans son ensemble, et cadencé pas à pas. La structure obturante est découpée à partir d'une bande, l'avance de la bande d'un pas, une séquence de découpe d'une structure obturante dans la bande et une opération de rabattage de la languette sont asservies à l'introduction d'une structure obturante dans un outil de formage et à une séquence d'assemblage des matériaux.According to one embodiment of the method according to the invention, said process is continuous, considered as a whole, and stepped step by step. The shutter structure is cut from a strip, the advance of the strip by one step, a cutting sequence of a shutter structure in the strip and a flap operation of the tongue are slaved to the introduction of a shutter structure in a forming tool and a material assembly sequence.

Selon un mode d'exécution du procédé de fabrication d'un emballage tel que défini ci-dessus, l'extrémité du corps tubulaire situé à proximité de ladite structure obturante subit une finition déterminée par le choix du couvercleAccording to one embodiment of the method of manufacturing a package as defined above, the end of the tubular body located close to said closure structure undergoes a finish determined by the choice of the lid

Le procédé selon l'invention est mis en oeuvre au moyen d'un outil de formage, comprenant un tampon de scellage; le dit tampon de scellage comprend une base scellante de section transversale conjuguée à la section transversale du corps tubulaire, dont la hauteur est inférieure à la largeur de la bande périphérique rabattable de la structure obturante, ladite base scellante étant surmontée d'un corps de tampon dont la section transversale est choisie de façon à ne pas venir en contact avec ladite structure obturante.The method according to the invention is implemented by means of a forming tool, comprising a sealing pad; said sealing pad comprises a sealing base of cross section conjugate to the cross section of the tubular body, the height of which is less than the width of the folding peripheral strip of the sealing structure, said sealing base being surmounted by a buffer body whose cross section is chosen so as not to come into contact with said shutter structure.

Selon un mode d'exécution de l'outil de formage le tampon de scellage comprend une deuxième bande scellante de section transversale conjuguée à la section transversale du corps tubulaire, agencée à une distance de ladite base scellante déterminée par la largeur de ladite partie intermédiaire non scellée.According to one embodiment of the forming tool the sealing pad comprises a second sealing strip of cross section conjugated to the cross section of the tubular body, arranged at a distance from said sealing base determined by the width of said unsealed intermediate portion.

L'invention a également pour objet un emballage selon les revendications 6 à 8.The invention also relates to a package according to claims 6 to 8.

Les machines de l'état de la technique travaillent à des cadences de 60-80 unités, à savoir corps tubulaires + membranes ou couvercles, par minute.The machines of the state of the art work at rates of 60-80 units, namely tubular bodies + membranes or lids, per minute.

Avec le fort développement des ventes de boites en carton depuis 2007 et la pression sur les prix exercée par les industries consommatrices de ces emballages, une demande existe pour trouver des solutions techniques pour produire plus, plus vite et moins cher. La machine selon l'invention peut être avantageusement adaptée à partir d'une machine réalisant les emballages deux par deux, telle que décrite dans FR 1261400 , munie d'outils de formage tels que définis ci-dessusWith the strong growth of sales of cardboard boxes since 2007 and the pressure on prices exerted by the industries Consumers of these packaging, a demand exists to find technical solutions to produce more, faster and cheaper. The machine according to the invention can be advantageously adapted from a machine carrying the packaging two by two, as described in FR 1261400 , equipped with forming tools as defined above

D'autres caractéristiques et avantages de l'invention seront mieux compris de l'homme du métier grâce à la description ci-dessous d'un mode d'exécution en référence au dessin, dans lequel

  • la figure 1 montre un corps tubulaire associé à une membrane de sécurité selon l'état de la technique,
  • la figure 2 montre la réalisation d'une structure obturante selon l'invention sous forme d'aplats à partir d'une bande,
  • la figure 3 montre l'introduction d'un aplat selon la figure 2 dans un outil de formage,
  • les figures 4 et 5 montrent les opérations de formage et de scellage de la structure obturante dans un corps tubulaire,
  • la figure 6 est une vue en coupe longitudinale d'une structure obturante scellée dans un corps tubulaire,
  • la figure 7 est une vue en perspective de l'assemblage de figure 6,
  • la figure 8 montre le début de l'opération d'extraction de la structure obturante par un utilisateur,
  • la figure 9 montre un exemple de finition du rebord du corps tubulaire pour accueillir un premier type de couvercle, la figure 9a étant une vue agrandie partielle
  • la figure 10 montre un deuxième exemple de finition du rebord du corps tubulaire pour accueillir un deuxième type de couvercle, la figure 10a étant une vue agrandie partielle,
  • la figure 11 montre un troisième exemple de finition du rebord du corps tubulaire pour accueillir un troisième type de couvercle, la figure 11a étant une vue agrandie partielle,
  • la figure 12 montre un quatrième exemple de finition du rebord du corps tubulaire pour accueillir un quatrième type de couvercle, la figure 12a étant une vue agrandie partielle,
  • la figure 13 montre un cinquième exemple de finition du rebord du corps tubulaire pour accueillir un cinquième type de couvercle, la figure 13a étant une vue agrandie partielle,
  • la figure 14 montre un sixième exemple de finition du rebord du corps tubulaire pour accueillir un sixième type de couvercle, la figure 14a étant une vue agrandie partielle,
  • la figure 15 montre un septième exemple de finition du rebord du corps tubulaire pour accueillir un septième type de couvercle, avec une prè-découpe du couvercle, la figure 15a étant une vue agrandie partielle,-
  • la figure 16 montre le détachement du couvercle de la figure 15, la figure 16a en étant une vue agrandie partielle.
  • la figure 17 montre un huitième exemple de finition du rebord du corps tubulaire pour accueillir un huitième type de couvercle, avec une pré-découpe du couvercle et de la membrane, la figure 17a étant une vue agrandie partielle,-
  • la figure 18 montre le détachement du couvercle de la figure 17, la figure 18a en étant une vue agrandie partielle.
  • la figure 19 montre une structure obturante à plat pour réaliser l'assemblage des figures 17 et 17a.
  • la figure 20 est une vue schématique en coupe axiale d'un tampon de scellage pour réaliser l'assemblage des figures 17 et 17a.
  • les figures 21a, 21b, 21c et 21d montrent des variantes d'exécution de structures obturantes, à plat.
Other features and advantages of the invention will be better understood by those skilled in the art by virtue of the description below of an embodiment with reference to the drawing, in which
  • the figure 1 shows a tubular body associated with a safety membrane according to the state of the art,
  • the figure 2 shows the realization of an obturating structure according to the invention in the form of solid areas from a strip,
  • the figure 3 shows the introduction of a solid according to the figure 2 in a forming tool,
  • the Figures 4 and 5 show the forming and sealing operations of the sealing structure in a tubular body,
  • the figure 6 is a longitudinal sectional view of a closed structure sealed in a tubular body,
  • the figure 7 is a perspective view of the assembly of figure 6 ,
  • the figure 8 shows the beginning of the extraction operation of the shutter structure by a user,
  • the figure 9 shows an example of finishing the rim of the tubular body to accommodate a first type of cover, the figure 9a being a partial enlarged view
  • the figure 10 shows a second example of finish of the rim of the tubular body to accommodate a second type of cover, the figure 10a being a partial enlarged view,
  • the figure 11 shows a third example of finishing the rim of the tubular body to accommodate a third type of lid, the figure 11a being a partial enlarged view,
  • the figure 12 shows a fourth example of finishing the rim of the tubular body to accommodate a fourth type of cover, the figure 12a being a partial enlarged view,
  • the figure 13 shows a fifth example of finish of the rim of the tubular body to accommodate a fifth type of cover, the figure 13a being a partial enlarged view,
  • the figure 14 shows a sixth example of finishing the rim of the tubular body to accommodate a sixth type of cover, the figure 14a being a partial enlarged view,
  • the figure 15 shows a seventh example of finishing of the rim of the tubular body to accommodate a seventh type of lid, with a pre-cut of the lid, the figure 15a being a partial enlarged view, -
  • the figure 16 shows the detachment of the lid of the figure 15 , the figure 16a being a partial enlarged view.
  • the figure 17 shows an eighth example of finishing the rim of the tubular body to accommodate an eighth type of lid, with a pre-cut of the lid and the membrane, the figure 17a being a partial enlarged view, -
  • the figure 18 shows the detachment of the lid of the figure 17 , the figure 18a being a partial enlarged view.
  • the figure 19 shows a flat blocking structure to achieve the assembly of Figures 17 and 17a .
  • the figure 20 is a diagrammatic view in axial section of a sealing pad to achieve the assembly of Figures 17 and 17a .
  • the Figures 21a, 21b, 21c and 21d show alternative embodiments of shutter structures, flat.

La figure 1 montre un corps tubulaire 1 associé à une membrane de sécurité 2 du type « recess-membrane » dont la partie périphérique 3 recouvre le rebord 4 du corps tubulaire 1. Dans cette structure de l'état de la technique la partie périphérique 3 héberge de nombreux replis, sources de défauts d'étanchéité. Une languette 5 est collée ou scellée sur la membrane de sécurité 2. Cette construction nécessite de la matière additionnelle Et des opérations complexes sur la membrane.The figure 1 shows a tubular body 1 associated with a safety membrane 2 of the "membrane-recess" type whose peripheral portion 3 covers the rim 4 of the tubular body 1. In this structure of the state of the art, the peripheral portion 3 houses numerous folds, sources of leaks. A tongue 5 is glued or sealed on the safety membrane 2. This construction requires additional material and complex operations on the membrane.

La figure 2 montre la réalisation d'une membrane de sécurité 6 selon l'invention, par étampage, à partir d'une bande de matériau de membrane avançant sous l'outil d'étampage. Dans le haut de la figure 2, on voit la languette 7, venue d'une pièce avec le reste de la membrane, repliée vers le centre de cette dernière pour former un aplat. Dans le mode de réalisation montré par la figure 2, de part et d'autre de la base de la languette 7, la périphérie de la membrane présente 2 petites zones concaves pour faciliter le détachement ultérieur de la membrane de la paroi intérieure du corps tubulaire. Les figures 21a, 21b, 21c et 21d montrent des variantes d'exécution de structures obturantes, à plat. L'homme du métier notera que si les formes des languettes diffèrent de la languette 7 de la figure 2, leur extrémité proximale se prolonge latéralement de part et d'autre par deux légères incurvations dont la concavité est orientée vers l'extérieur de la structure obturante.The figure 2 shows the realization of a safety membrane 6 according to the invention, by stamping, from a strip of membrane material advancing under the stamping tool. At the top of the figure 2 , we see the tongue 7, come in one piece with the rest of the membrane, folded towards the center of the latter to form a solid. In the embodiment shown by the figure 2 , on either side of the base of the tongue 7, the periphery of the membrane has 2 small concave zones to facilitate the subsequent detachment of the membrane from the inner wall of the tubular body. The Figures 21a, 21b, 21c and 21d show alternative embodiments of shutter structures, flat. The skilled person will note that if the shapes of the tabs differ from the tongue 7 of the figure 2 , their proximal end extends laterally on both sides by two slight curvatures whose concavity is oriented towards the outside of the shutter structure.

La figure 3 montre la membrane 6, encore sous forme d'aplat, introduite dans un outil de formage 8 dont la structure d'ensemble et le mode de fonctionnement sont connus dans l'état de la technique. La figure 4 montre la descente du tampon de scellage 9 et le pincement des serre-flancs 10 et de la matrice de formage 11. La figure 5 montre la membrane de sécurité 6 formée en cuvette, la languette 7 étant repliée à angle droit par le tampon de scellage 9. L'homme du métier appréciera au vu des figures 4 et 5 que seule la base 12 du tampon de scellage 9 interagit sur son pourtour avec la membrane 6, la partie supérieure du tampon de scellage étant en retrait, optionnellement recouverte d'une couche thermiquement isolante. De même, le tampon de scellage présente de préférence dans sa partie basse une zone isolée thermiquement par un protecteur pour ne pas coller à la languette, par effet d'activation, sur la partie scellante de la languette lors de la sortie du tampon.The figure 3 shows the membrane 6, again in solid form, introduced into a forming tool 8 whose overall structure and mode of operation are known in the state of the art. The figure 4 shows the descent of the sealing pad 9 and the clamping of the flanks 10 and the forming die 11. The figure 5 shows the security membrane 6 formed in a bowl, the tongue 7 being bent at right angles by the sealing pad 9. The skilled person will appreciate in view of Figures 4 and 5 that only the base 12 of the sealing buffer 9 interacts on its periphery with the membrane 6, the upper part of the sealing pad being recessed, optionally covered with a thermally insulating layer. Similarly, the sealing pad preferably has in its lower part an area thermally insulated by a protector not to stick to the tongue, by activation effect, on the sealing portion of the tongue during the output of the buffer.

Avec la configuration décrite ci-dessus, il est possible de serrer fortement la matrice de formage et ainsi concentrer les plis/surépaisseurs vers la zone marginale non scellée de la membrane, en améliorant l'étanchéité membrane/corps tubulaire, tout en évitant de déplacer la membrane par effet de friction lors du retrait du tampon.With the configuration described above, it is possible to strongly tighten the forming die and thus concentrate the folds / thickenings to the unsealed marginal area of the membrane, improving the membrane / tubular body seal, while avoiding moving the membrane by friction effect when removing the buffer.

La figure 6 et la figure 7 montrent le résultat de l'opération: seule la zone 13 de la bande périphérique de la membrane 6 visualisée par un trait en surépaisseur est scellée au corps tubulaire 1. La languette 7 et la zone marginale de la membrane 6 ne sont pas solidarisées au corps tubulaire 1. La zone marginale non scellée peu en particulier avoir une largeur de 1 à 3 mm. La figure 8 montre le début d'une opération de détachement de la membrane 6 par un utilisateur qui saisit la languette 7. La traction sur la languette 7 se répartit de part et d'autre de la base de celle-ci grâce à la zone marginale restée libre. La concavité des zones marginales limitrophes de la base de la languette montrée en particulier sur la figure 2 contribue à cette répartition.The figure 6 and the figure 7 show the result of the operation: only the zone 13 of the peripheral band of the membrane 6 visualized by a thickened line is sealed to the tubular body 1. The tongue 7 and the marginal zone of the membrane 6 are not secured to the body tubular 1. The unsealed marginal area may in particular have a width of 1 to 3 mm. The figure 8 shows the beginning of a detachment operation of the membrane 6 by a user who grasps the tongue 7. The traction on the tongue 7 is distributed on either side of the base thereof thanks to the free marginal area . The concavity of the marginal areas bordering the base of the tongue shown in particular on the figure 2 contributes to this distribution.

L'homme du métier appréciera en particulier au vu de la figure 6 que la membrane de sécurité est positionnée selon l'invention à une certaine distance du rebord 14 du corps tubulaire, à une profondeur choisie par le fabricant de l'emballage en fonction du couvercle destiné à cet emballage. Cette distance permet d'effectuer une opération de finition du rebord, qui dans la majorité des cas n'affecte pas la membrane mais peut néanmoins englober celle-ci.
L'homme du métier appréciera également que de très nombreux matériaux, tels que ceux, cités plus haut, sont utilisables pour réaliser la membrane, la seule condition étant la compatibilité avec le matériau barrière interne du corps tubulaire en ce qui concerne le thermoscellage.The skilled person will appreciate in particular in view of the figure 6 that the safety membrane is positioned according to the invention at a distance from the flange 14 of the tubular body at a depth chosen by the manufacturer of the package according to the cover for this package. This distance makes it possible to perform a finishing operation of the rim, which in the majority of cases does not affect the membrane but may nevertheless include it.
Those skilled in the art will also appreciate that a great many materials, such as those mentioned above, can be used to make the membrane, the only condition being the compatibility with the internal barrier material of the tubular body with regard to heat sealing.

Les figures 9-16 montrent une pluralité d'exemples non limitatifs de telles opérations de finition par des rainurages ou par des ourlages:

  • les figures 9 et 9a montrent un rainurage pour couvercle rentrant,
  • les figures 10 et 10a montrent un rainurage pour couvercle à prise extérieure (couvercle clipsé),
  • les figures 11 et 11a montrent un ourlage pour couvercle à prise extérieure,
  • les figures 12 et 12a montrent la pose d'un insert entre le bord droit du corps tubulaire et un couvercle à prise extérieure,
  • les figures 13 et 13a montrent un deuxième ourlage pour couvercle à prise extérieure,
  • les figures 14 et 14a montrent un troisième ourlage pour couvercle à prise extérieure,
  • les figures 15 et 15a montrent un quatrième ourlage du rebord du corps tubulaire recouvrant le bord d'un couvercle rentrant, avec une prè-découpe du corps tubulaire à proximité de cet ourlage, sans déboucher dans le couvercle lui-même, permettant, comme le montrent les figures 16 et 16a, une séparation facile du couvercle sans affecter la membrane de sécurité, ainsi qu'une re-fermeture de l'emballage après arrachage de la membrane.
The Figures 9-16 show a plurality of non-limiting examples of such finishing operations by grooves or by hemming:
  • the Figures 9 and 9a show a groove for a retracting lid,
  • the Figures 10 and 10a show a grooving for cover with external plug (lid clipped),
  • the Figures 11 and 11a show hemming for externally seated lid,
  • the Figures 12 and 12a show the insertion of an insert between the straight edge of the tubular body and an externally-gripped cover,
  • the Figures 13 and 13a show a second hemming for cover with external grip,
  • the Figures 14 and 14a show a third hemming for cover with external grip,
  • the Figures 15 and 15a show a fourth hemming of the rim of the tubular body covering the edge of a reentrant lid, with a pre-cut tubular body close to this hemming, without opening into the lid itself, allowing, as shown by the Figures 16 and 16a easy separation of the lid without affecting the safety diaphragm, as well as re-closing the package after tearing off the membrane.

La figure 19 montre un mode d'exécution de la structure obturante dans lequel la bande périphérique, symbolisée par le cercle en traits pointillés est plus large que dans le mode d'exécution montrée dans la figure 2 et les zones de découpe concave 18 de part et d'autre de la languette sont plus profondes. Le tampon de scellage destiné à mettre en place cette structure obturante dans le corps tubulaire présente, en plus de la base scellante 12 du mode d'exécution montré par les figures 3-5 une deuxième bande scellante 19 agencée à une distance de la base scellante déterminée par la largeur de la partie intermédiaire de la bande périphérique de la structure obturante destinée à ne pas être scellée. Le résultat de l'opération est montré en particulier sur la figure 17a. La bande périphérique est scellée au corps tubulaire dans sa zone marginale supérieure 16 et dans sa zone inférieure 17, laissant libre une zone intermédiaire, au niveau de laquelle est pratiquée une découpe 15 sur la circonférence du corps tubulaire, dans une opération de finition qui suit l'opération d'ourlage du rebord supérieur du corps tubulaire. Les figures 18 et 18a montrent le détachement du couvercle de la structure montrée sur les figures 17 et 17a. L'homme du métier notera que lors du détachement du couvercle la zone marginale initiale de la structure obturante en est détachée et reste solidaire du couvercle tandis que la partie intermédiaire, dont est solidaire la partie proximale de la languette devient la nouvelle zone marginale supérieure de la membrane de sécurité.The figure 19 shows an embodiment of the shutter structure in which the peripheral band, symbolized by the dashed circle, is wider than in the embodiment shown in FIG. figure 2 and the concave cutting areas 18 on either side of the tongue are deeper. The sealing pad intended to set up this closure structure in the tubular body has, in addition to the sealing base 12 of the embodiment shown by the figures 3-5 a second sealing strip 19 arranged at a distance from the sealing base determined by the width of the intermediate portion of the peripheral strip of the closure structure intended not to be sealed. The result of the operation is shown in particular on the figure 17a . The circumferential band is sealed to the tubular body in its upper marginal zone 16 and in its lower zone 17, leaving free an intermediate zone, at which a cutout is made on the circumference of the tubular body, in a finishing operation which follows the hemming operation of the upper rim of the tubular body. The Figures 18 and 18a show the detachment of the cover of the structure shown on the Figures 17 and 17a . The skilled person will note that during the detachment of the cover the initial marginal area of the shutter structure is detached and remains integral with the lid while the intermediate portion, which is integral with the proximal portion of the tongue becomes the new upper marginal zone of the safety membrane.

La variété des exemples ci-dessus démontre que l'assemblage d'une membrane de sécurité et d'un corps tubulaire selon l'invention offre une certaine universalité quant au choix des couvercles adaptables, aussi bien en ce qui concerne la forme des couvercles que leurs matériaux, et donc une large gamme d'applications.The variety of examples above demonstrates that the assembly of a safety membrane and a tubular body according to the invention offers a certain universality as to the choice of adaptable lids, as well as with regard to the shape of the lids that their materials, and therefore a wide range of applications.

Claims (8)

  1. A method for manufacturing a packaging comprising a tubular body (1) made from one or more layers of a cardboard material and a sealing structure, forming a security membrane, comprising
    - providing a sealing structure in the form of a flat (6) comprising a central part with a shape conjugated to the shape of the opening of the tubular body, surrounded by a peripheral strip able to be sufficiently folded down to assemble the sealing structure with the inner lateral wall of the tubular body in an airtight manner, and a tongue (7) integral with the rest of the sealing structure, with a sufficient size to allow gripping by a consumer, comprising a proximal end situated in said peripheral strip and a distal end extending outside said peripheral strip, said distal end of the tongue being folded down toward the central part of the sealing structure, on the face not designed for sealing, in order to form said flat,
    - inserting the sealing structure in a shaping tool and shaping it in the form of a basin, the peripheral strip becoming orthogonal to said central part,
    - inserting and placing the tubular body at a predetermined level, and
    - sealing the peripheral strip in the tubular body using said shaping tool, with the exception of an unsealed part thereof, extending over the circumference of said peripheral strip, forming the marginal zone of the sealing structure in the packaging.
  2. The method according to claim 1, characterized in that the proximal end of the tongue is situated in the unsealed part of the peripheral strip and extends laterally on either side by two curves, the concave side of which is oriented toward the outside of the sealing structure.
  3. The method according to one of claims 1 or 2, characterized in that said method is continuous and paced step by step; the sealing structure is cut from a strip, the advancement of the strip by one step, a cutting sequence of a sealing structure in the strip and an operation for folding down the tongue are made subject to the insertion of a sealing structure into a shaping tool and to an assembly sequence of the materials.
  4. The method according to one of claims 1 to 3, characterized in that the end of the tubular body situated near said sealing structure undergoes a finishing operation determined by the choice of the cover.
  5. A method for manufacturing a packaging comprising a tubular body (1) made from one or more layers of a cardboard material and a sealing structure, forming a security membrane, comprising
    - providing a sealing structure in the form of a flat (6) comprising a central part with a shape conjugated to the shape of the opening of the tubular body, surrounded by a peripheral strip able to be sufficiently folded down to assemble the sealing structure with the inner lateral wall of the tubular body in an airtight manner, and a tongue (7) integral with the rest of the sealing structure, with a sufficient size to allow gripping by a consumer, comprising a proximal end situated in said peripheral strip and a distal end extending outside said peripheral strip, said distal end of the tongue being folded down toward the central part of the sealing structure, on the face not designed for sealing, in order to form said flat,
    - inserting the sealing structure in a shaping tool and shaping it in the form of a basin, the peripheral strip becoming orthogonal to said central part,
    - inserting and placing the tubular body at a predetermined level,
    - sealing the peripheral strip in the tubular body using said shaping tool, with the exception of an unsealed part thereof, extending over the circumference of said peripheral strip, the unsealed part being made up of an intermediate part of said peripheral strip situated between the marginal zone (16) thereof and the zone (17) of the proximal peripheral strip of the central part of the sealing structure, and
    - after sealing of said marginal zone and said proximal zone, cutting (15) the tubular body and the sealing structure along a circumference of the tubular body situated across from said intermediate part, so that said intermediate part becomes the marginal zone of the sealing structure in the finished packaging.
  6. Packaging comprising a tubular body (1) made from one or more layers of a cardboard material and a sealing structure, forming a security membrane,
    - said sealing structure (6) comprising a central part with a shape conjugated to the shape of the opening of the tubular body, a peripheral strip surrounding said central part, folded down against the inner lateral wall of the tubular body so as to form a basin, the width of said peripheral strip being sufficient to assemble, in an airtight manner, the sealing structure with the lateral wall of the body comprising a proximal end situated in said peripheral strip and a distal end extending outside said peripheral strip,
    - a sealing of the peripheral strip to the tubular body being performed at a predetermined level of the tubular body, in a zone (13, 17) of the proximal peripheral strip of the central part of the sealing structure, with the exception of an unsealed part of said peripheral strip, extending over the circumference of said peripheral strip, forming the marginal zone of the sealing structure in the packaging,
    characterized in that said tongue is folded down against the central part of the sealing structure on the face thereof which is not sealed to the tubular body, and in that the peripheral strip is orthogonal to said central part.
  7. Packaging according to claim 6, characterized in that the proximal end of the tongue is situated in the unsealed part of the peripheral strip and extends laterally on either side by two curves, the concave side of which is oriented toward the outside of the sealing structure.
  8. Packaging according to any of claims 6 or 7, characterized in that the end of the tubular body situated near said sealing structure comprises a finish determined by the choice of the cover.
EP14194130.2A 2013-11-27 2014-11-20 Method for assembling tubular bodies made of cardboard material with a sealing structure Active EP2878546B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1361693A FR3013628B1 (en) 2013-11-27 2013-11-27 METHOD FOR ASSEMBLING TUBULAR BODIES OF CARDBOARD MATERIAL WITH AN SHUTTER STRUCTURE

Publications (2)

Publication Number Publication Date
EP2878546A1 EP2878546A1 (en) 2015-06-03
EP2878546B1 true EP2878546B1 (en) 2018-03-28

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EP14194130.2A Active EP2878546B1 (en) 2013-11-27 2014-11-20 Method for assembling tubular bodies made of cardboard material with a sealing structure

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US (1) US10315377B2 (en)
EP (1) EP2878546B1 (en)
DK (1) DK2878546T3 (en)
ES (1) ES2673097T3 (en)
FR (1) FR3013628B1 (en)
TR (1) TR201809055T4 (en)

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SE542898C2 (en) 2018-08-31 2020-08-18 Å&R Carton Lund Ab A composite container with separable top, a body blank, and a method of separating a top end portion from a main body of the container
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Also Published As

Publication number Publication date
US10315377B2 (en) 2019-06-11
EP2878546A1 (en) 2015-06-03
ES2673097T3 (en) 2018-06-19
TR201809055T4 (en) 2018-07-23
FR3013628B1 (en) 2016-07-01
DK2878546T3 (en) 2018-06-18
FR3013628A1 (en) 2015-05-29
US20150148208A1 (en) 2015-05-28

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