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
  • 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
• • 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
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
  • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
• • 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
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
  • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
• • 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
  • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
  • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
  • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
  • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
  • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
  • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
• • 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
  • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
  • B29C66/61—Joining from or joining on the inside
  • B29C66/612—Making circumferential 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
  • B29C66/70—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
  • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
  • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
• • 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
  • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
  • B29C66/832—Reciprocating joining or pressing tools
  • B29C66/8322—Joining or pressing tools reciprocating along one axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
  • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
• • 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
  • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
  • B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
• • 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
  • 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
  • B65B7/165—Securing by deformation of the web material
• • 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
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
  • B65D77/2068—Means for reclosing the cover after its first opening
  • B65D77/2072—Mechanical means
  • B65D77/2076—Mechanical means provided by the cover itself
  • B65D77/208—Mechanical means provided by the cover itself the cover having a cap-like or plug-like shape
• • 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
  • B29L2031/00—Other particular articles
  • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
  • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
• • 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
  • B29L2031/7158—Bottles

Definitions

• the invention relates to a container, such as those commonly found for liquids or foodstuffs, the method of capping a container and its use.
• the invention relates to the field of capping containers, including bottles and bricks, of the type of those comprising a neck, the neck forming a constriction on the container.
• a container generally comprises a body, defining a filling volume, closed by a bottom at a lower end.
• the body is surmounted by an open neck, of lower section than the body and thus forming a constriction, so as to facilitate the flow of the product out of the container.
• the body is for example obtained by blow molding or stretch-blow molding of a thermoplastic preform, the neck being previously attached to, or more commonly an integral part of, the preform.
• the body may also be a brick, for example of cardboard, on which a plastic collar is attached.
• a first category consists in forming on the neck temporary fixing means with a plug.
• the plug is in the form of a rigid piece, for example plastic, whose dimensions allow it to cover the neck and the opening.
• the temporary fastening means are for example of the latching type, or else of the thread type on the collar cooperating with a counter-thread of the plug.
• EP 0 941 938 illustrates an example of a closure system of this first category.
• Such plugs have the particular advantage of providing a secure closure, even tight, and allow to remove the cap to open the container and replace the cap to close the container tightly several times, without degrading the quality of the closure.
• rigid plugs are expensive to manufacture.
• they require the establishment of fixing means dedicated to their establishment on the neck, respecting dimensions adapted to the plug, making the shape of the neck complex, and thus further increasing the manufacturing costs.
• the second category is to apply a sheet of a flexible material, typically aluminum, over the opening and covering the neck.
• the sheet is then fixed on the neck, for example by gluing or heat sealing.
• the attachment of the leaf on the neck must be broken.
• the sheet may be accompanied by an overcap, that is to say an additional cap, reported over the sheet.
• This second category of closure systems is, when the sheet is not accompanied by an overload, that the costs are reduced compared to the plugs of the first category. Indeed, the amount of material constituting the sheet is lower than that of the plugs of the first category. In addition, the attachment of the sheet on the neck does not require additional means to form on the neck, simplifying the design and manufacture of the neck. This is why this second category of closure systems is generally implemented on bottles whose neck is not long enough to allow the formation of such additional means.
• the sheet does not allow to close the container. Indeed, even if the sheet can be placed on the opening of the neck, there is no longer means of attachment. The container can no longer be sealed. The contents may then spill out of the container inadvertently, or foreign bodies may enter the container.
• the invention proposes for this purpose according to a first aspect a method of capping a hollow container.
• the container comprises a body extending between an upper end and a lower end, the upper end being surmounted by a neck forming a narrowing on the container and defining an opening towards the interior of the container and the lower end comprising a bottom closing the container.
• the capping process comprises the following steps: applying a sheet on the entire edge of the opening of the container so as to cover the opening,
• the stamping of the sheet in the opening of the neck of the container by a matrix so that the sheet forms a flange bearing against the entire edge of the opening, a central zone surrounded by the flange and lying in a plane offset from the latter, and a junction zone between the flange and the central zone, the junction zone forming a riser in contact with the inner wall of the neck,
• the closure method according to the invention allows in particular to form a simple and economical way a plug from a sheet.
• the sheet shaped during the stamping operation has a shape adapted to a subsequent filling.
• the method may comprise the following characteristics: the sheet is made of thermoplastic material, which makes it particularly inexpensive, and particularly suitable for stamping. Indeed, the ductility of the sheet of thermoplastic material can be easily controlled by heating;
• the sheet comprises at least one portion extending beyond the edge of the opening, so as to form a gripping zone after the drawing step.
• the gripping zone in particular makes it easier to open the container by pulling on the shaped sheet;
• the fixing step comprises a soldering step between the sheet and the neck.
• the welding allows a secure and fast fixing between the neck and the sheet;
• the weld is made between the riser and the inner wall of the neck, so that the riser is in sealing contact with the inner wall of the neck;
• the welding step is simultaneous with the stamping step, reducing the time of implementation of the process, and therefore the costs;
• the fixing step comprises a step of bonding between the sheet and the neck. Gluing is also a cost-effective means of obtaining adequate fixation of the leaf on the neck;
• the stamping step is accompanied by a step of heating the sheet, to facilitate the plugging of the sheet;
• the neck of the container is made of thermoplastic material
• the container body is made of thermoplastic material.
• the body is thus obtained for example by a method of blowing or stretch-blow molding a preform in a mold, or by a molding process.
• the invention provides a plugged container obtained by the method as presented above, in which the neck is devoid of threading or in which the neck is devoid of latching means.
• the invention proposes a use of the stoppered container according to the process presented above, comprising an opening step in which the attachment between the sheet and the container is broken, separating the sheet from the body of the container to allow its opening, and a closing step in which the flange of the sheet is placed on the edge of the opening, the central area plugging the opening.
• FIG. 1 is an illustration of a bottle-type container comprising a closure system according to the invention
• FIG. 2 is a top view of the closure system of FIG. 1;
• FIG. 3 is a sectional view of the closure system of FIGS. 1 and 2;
• FIGS. 4 to 8 each illustrate and in turn a step of a process for obtaining the container of FIG.
• Figure 1 illustrates a container 1 which extends along a longitudinal axis X.
• the container 1 is for example a bottle, intended to contain a liquid suitable for drinking.
• the container 1 comprises a body 2, extending between an upper end 3 and a lower end 4.
• the terms “lower”, “upper”, “high”, “low” etc. are used with reference to the drawings for greater ease of understanding. They should not be understood as limitations of the scope of the invention.
• the upper end 3 is surmounted, in the direction of the main axis X, by a neck 5, of smaller cross section than the cross section of the body 2.
• a shoulder 6 connects the neck 5 to the upper end 3 of the body 2.
• the neck 5 thus forms a narrowing on the container 1.
• the neck 5 has a free end 7 open, forming the edge of an opening 8 (as referenced in Figure 4) towards the inside of the container 1.
• the lower end 4 of the body 2 of the container 1 is closed by a bottom 9.
• the container 1 may have, as shown in Figure 1, a generally symmetrical shape of revolution about the longitudinal axis X. However, such symmetry is by no means necessary.
• the opening 8 and its edge 7 are for example of circular cross section.
• the container 1 may be made of thermoplastic material, such as PET, and is formed for example by a molding process, blow molding or stretch blow molding, from a preform.
• the body 2 of the container is made of cardboard; the neck 5, made of thermoplastic material, is fixed rigidly on the body 2.
• the neck 5 may have a flange 5 'projecting transverse, serving as a support during the various steps of manufacturing the container.
• the opening 8 of the neck 5 is plugged by means of a sheet 10 shaped as a plug, according to a sealing process that will now be described.
• the sheet 10 is initially in the form of a disc of thin material, the thickness of which is of the order of one millimeter or less.
• the sheet 10 is of ductile material, that is to say that it is intended to plastically deform under the action of a minimum stress without breaking.
• it is thermoformable material, that is to say, it can be plastically deformed without breaking after having undergone an increase in temperature.
• the sheet 10 is applied to the entire edge 7 of the opening 8 of the container 1.
• the sheet 10, in disk form, is centered on the longitudinal axis X so as to completely cover the opening 8.
• a die 11 comprises a cavity 12 corresponding to the opening 8 and the edge 7 thereof.
• the matrix 1 1 is movable in translation along the longitudinal axis X.
• the container 1 which is movable in translation along the longitudinal axis X.
• the imprint 12 of the matrix 11 is formed by two portions.
• a first portion 12a extends along the longitudinal axis X over a distance of the order of one centimeter, and has a cross section corresponding substantially to the internal cross section of the neck 5.
• the second portion 12b also extends according to the longitudinal axis X, and has a cross section whose dimensions are greater than those of the cross section of the opening 8.
• the first portion 12a of the cavity 12 of the matrix 1 1 between in contact with the sheet 10 and penetrates inside the neck 5 through the opening 8 until the second portion 12b abuts against the edge 7 of the opening 8 by crushing the sheet 10 against the edge 7 .
• the sheet 10, then of thermoformable material can be heated.
• the heating can take place just before or during stamping, the matrix 1 1 then comprising heating means for this purpose.
• the matrix 1 possibly associated with a heating step, thus exerts sufficient stress on the sheet 10 to plastically deform it.
• the central zone 13 is surrounded by a flange 14, resting on the edge 7 of the opening 8.
• the central zone 13 and the collar 14 of the sheet 10 are offset along the longitudinal axis X relative to one another. other (in other words, the collar 14 and the central zone 13 are in offset planes).
• a junction zone 15 is created between the central zone 13 and the flange 14 of the sheet 10.
• the junction zone constitutes a riser 15 between the flange 14 and the central zone 13 and is advantageously in contact with the inner wall of the neck 5.
• the central zone 13 has a circular cross section, adapted to the opening 8.
• the flange 14 of the sheet 10 is also circular, limiting in particular the space beyond the edge 7 of the opening 8.
• the pressed sheet 10 is fixed on the neck 5, thus ensuring the joining of the sheet 10 to the body 2 of the container 1.
• the fastening is performed by welding between the flange 14 of the sheet 10 and the edge 7 of the opening 8.
• the welding is carried out between the riser 15 and the inner wall of the collar 5.
• the welding step can take place at the same time as the stamping step.
• the die 1 1 is provided with heating means carrying the sheet 10, and optionally the neck 5, at a temperature sufficient to cause the welding.
• the attachment is made by gluing.
• the edge 7 of the opening 8 of the neck 5 is coated with a layer of glue, preferably a food glue.
• glue preferably a food glue.
• the fixing step ensures a tight contact between the flange 14 of the sheet 10 and the edge 7 and / or between the riser 15 and the inner wall of the neck 5.
• the sheet 10 When the die is moved along the longitudinal X axis to move away from the sheet 10, the sheet 10 remains fixed rigidly on the neck 5.
• the sheet 10 thus forms a plug, preventing liquid from escaping from the container, and preventing outer bodies from entering the container.
• the sheet 10 may comprise a portion projecting transversely from the flange 14 of the sheet 10, and forming a gripping area 16, as can be seen in FIGS. 2.
• the flange 14 may be square in which the opening 8 fits. The corners of the collar 14 extending beyond the edge 7 of the opening 8 then form gripping areas. It is understood that the flange 14, and the sheet 10 in general, may be of any shape, covering the opening 8.
• the gripping zone 16 exerts a force to break the binding between the sheet 10 and the neck 5.
• the sheet 10 is thus separated from the container 1.
• the sheet 10 retains its conformation plug, that is to say the central zone 13, the flange 14 and the riser 15.
• the choice of material and the thickness of the sheet 10 avoids the sheet 10 that it does tear when breaking the fastener.
• the sheet 10 can be replaced over the opening 8, by inserting the central zone 13 into the opening 8 to seal it, the flange 14 of the sheet 10 resting on the edge 7. that the fastener is broken, the shape of the sheet 10 as a plug allows a connection between the sheet 10 and the container 1, limiting the risk that the contents of the container may escape from the container or that foreign bodies do not penetrate into the container the container 1.
• the sheet 10 may be of flexible or rigid material.
• Rigid means here the property of the sheet 10 to maintain its shape under the action of a maximum stress determined under normal conditions of use of the container 1.
• the sheet 10 is made of thermoplastic material, or of metal such as aluminum.
• the neck 5 no longer requires specific means for receiving a plug, such as a thread or snap-fastening means.
• the neck 5 is also devoid of such means.
• the sheet 10 thus provides a plug at a lower cost, furthermore making it possible to close the opening 8 of the container 1.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51293061

Family Applications (1)

Country Status (5)

Family Cites Families (16)

• 2014
  • 2014-04-02 FR FR1452934A patent/FR3019538B1/fr not_active Expired - Fee Related
• 2015
  • 2015-03-23 US US15/301,514 patent/US20170121087A1/en not_active Abandoned
  • 2015-03-23 WO PCT/FR2015/050720 patent/WO2015150661A1/fr active Application Filing
  • 2015-03-23 EP EP15718967.1A patent/EP3126247A1/de not_active Withdrawn
  • 2015-03-23 CN CN201580017381.7A patent/CN106132665A/zh active Pending

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events