EP0816245A1 - Dispensing head for dispensing a liquid-like viscous product having an elastic closing means as well as dispensing assembly comprising such device - Google Patents

Dispensing head for dispensing a liquid-like viscous product having an elastic closing means as well as dispensing assembly comprising such device Download PDF

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Publication number
EP0816245A1
EP0816245A1 EP97401401A EP97401401A EP0816245A1 EP 0816245 A1 EP0816245 A1 EP 0816245A1 EP 97401401 A EP97401401 A EP 97401401A EP 97401401 A EP97401401 A EP 97401401A EP 0816245 A1 EP0816245 A1 EP 0816245A1
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EP
European Patent Office
Prior art keywords
dispensing head
head according
elastic member
product
capsule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97401401A
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German (de)
French (fr)
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EP0816245B1 (en
Inventor
Nicolas Albisetti
Gilles Baudin
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LOreal SA
Original Assignee
LOreal SA
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Publication date
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Classifications

    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
    • B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure
    • B65D47/2031—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure the element being formed by a slit, narrow opening or constrictable spout, the size of the outlet passage being able to be varied by increasing or decreasing the pressure
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/36—Closures with frangible parts adapted to be pierced, torn, or removed, to provide discharge openings
    • B65D47/38—Closures with frangible parts adapted to be pierced, torn, or removed, to provide discharge openings with piercing means arranged to act subsequently as a valve to control the opening

Definitions

  • the invention relates to a dispensing head for a consistency product.
  • viscous liquid comprising a rigid capsule and an elastic member for closure provided with at least one closed distribution slot, capable of opening under the thrust of the product and to return to an initial position, when this thrust.
  • the invention also relates to a product distribution assembly equipped with this dispensing head, as well as a process for manufacturing this last.
  • the invention relates to a distribution set of the kind of those which include a semi-rigid or flexible tank fitted with a dispensing head rigid or semi-rigid, provided with an elastically dispensing orifice deformable.
  • the distribution assembly of the invention is intended, more particularly, to equip a compressible tank containing the product and allow its distribution in good conditions of cleanliness.
  • This product can be, in particular, a cosmetic, dermatological or food product, such as by example a shampoo, a styling gel, a foaming shower gel, a liquid soap, face cream, body lotion, liquid eyeshadow, or household product or glue.
  • a tube of liquid product equipped a distribution head has a rigid capsule provided with a product outlet orifice in the form of an elastic membrane reported, in which is made, by mechanical cutting, a slot.
  • a fixing ring holds the membrane on the dispensing head.
  • this tube has drawbacks from the point of view of its manufacturing. Indeed, the assembly of the head into two or three separate parts (capsule, membrane, fixing ring of the latter), requires the use of a special assembly machine increasing the manufacturing price. In addition, the production of the slit is carried out, in particular, by cutting requiring the recovery of the membrane in another machine, which further increases considerably the cost price of the dispensing head of the prior art.
  • a dispensing head comprising a circular membrane split with a peripheral fixing sleeve folded into a "U" shape.
  • the edges of the slot are obtained by mechanical cutting of the slot. Consequently, this distribution head is expensive and economically disadvantageous. For for this reason, it is not suitable, in particular, for a widely distributed product, like a shampoo or dishwashing detergent, for which the sale price must be moderate.
  • the elastic closure has a slot formed by two parallel lips, located in particular projecting from the outer face of the elastic member, so that a recess is formed on the inner face of the organ, in a area near the edges of the lips.
  • the object of the present invention is to provide a distribution assembly for simple to manufacture and extremely cost-effective.
  • the Applicant has discovered that one and the same can be carried out machine, on the one hand the injection of the capsule and the elastic member, and on the other hand apart from making a slot with contiguous edges therein.
  • the distribution slot of the elastic member is not obtained by mechanical cutting, but by knocking down using a suitable tool of a thinner area, for example mechanically or pneumatically.
  • This knockout can be, in particular a pressure exerted on one side or the other of the elastic member on the area of reduced thickness.
  • the present invention relates to a product dispensing head of liquid viscous consistency, comprising a rigid or semi-rigid capsule and an elastic closure member secured to the capsule.
  • the dispensing head is characterized in that a smaller area thickness is delimited by the edges of a groove made in the organ elastic, the thinner zone being able to rupture under the effect of pressure exerted on one side or the other of the elastic member so defining at least one contiguous slot capable of opening under the thrust of the product for distribution, and return to the joined position when this thrust.
  • the elastic closure member is in the form a more or less thick membrane, placed at the end of a channel supply in the capsule and in communication with a reservoir containing the product to be distributed.
  • the capsule is formed from a first thermoplastic material rigid or semi-rigid, for example polyethylene or polypropylene.
  • This capsule is fixed, for example by screwing or snapping, on the reservoir product to distribute.
  • this bottle is semi-rigid or flexible, provided of compressible walls, so that a pressure on the walls of the bottle triggers the distribution of the product.
  • the capsule is provided a distribution channel closed by the elastic member.
  • the slot is made by knocking out of the membrane.
  • the throat constituting a zone of pre-weakening, for example in the form of a veil, can be opened by knocking, or mechanically using an appropriate tool, either pneumatically, using a jet of compressed air.
  • the slot may be surrounded, continuously or discontinuously, by a bead or reinforcement godron.
  • the knockout of the thinner area can be carried out, in particular, either on the internal side or on the external side of the membrane.
  • the slot thus formed constitutes a dispensing orifice, substantially sealed to the untimely flow of the product.
  • the edges of this slot deviate from one of the other, when the user exerts pressure on the inverted bottle, head in low, to cause the distribution of a dose of product. Thanks to the elasticity of the membrane, the slit returns to its original shape, when the pressure on the bottle, and the flow of the product stops completely.
  • this elastic member is a membrane made of a second material elastomeric, and more particularly in thermoplastic elastomer. More precisely, this membrane is formed by a flexible material, having a shape memory capable of resuming, after deformation, its initial shape.
  • this material is chosen so that the membrane can be molded in a single piece with the capsule, for example by biinjection first and second materials.
  • a second material we choose an elastomer that is physically and chemically compatible with the first material of the capsule and capable of forming a bond with it solid, by thermofusion.
  • the membrane is constituted, by example, by blends of polypropylene and block copolymers styrene - butadiene - styrene, polypropylene and block copolymers styrene - ethylene - butylene - styrene, polypropylene and copolymers of block of ethylene - propylene - diene.
  • the membrane is in the form of a washer of variable thickness. It is however possible to carry it out in any other desirable shape, for example oval.
  • the surface of this washer can be flat, but advantageously, this surface is curved, for example concave or convex. More particularly, a convex membrane is preferred whose convexity is turned to the side where the product push is exerted.
  • the slit in the membrane preferably passes through the center of the washer. According to the invention, this slot is located at the bottom of a groove formed in the membrane.
  • This throat straight or curvilinear, presents advantageously a “V” or “U” section. It can be done in several branches. Two or more grooves can be made. These gorges can be parallel or crossed.
  • the membrane has two grooves crossed, forming a right angle between them.
  • the depth of this gorge advantageously represents 30% to 90% of the total thickness of the membrane.
  • the total thickness of the membrane is located between 0.5 mm and 3 mm.
  • such a groove has a length from about 0.5 cm to 2.5 cm.
  • the bottom of the throat is formed by an area of lesser thickness in the form of a thick veil from about 0.1 mm to 1 mm.
  • the capsule may further include a hinged cover capable of being placed on the elastic member and intended to ensure the protection of the membrane during product storage.
  • this cover is articulated with the capsule, preferably, using a film hinge. This allows molding integral in a single piece of the dispensing head (capsule - hinge - cover - membrane with slot).
  • the inside of the cover may include one or more sealing means, capable of coming to bear on the elastic organ.
  • its internal face may include an annular bead, able to surround the slot and press tightly against the membrane.
  • a distribution assembly provided with a product reservoir and comprising the head dispenser according to the invention can be used, in particular, for the distribution of a liquid viscous consistency product.
  • the viscosity of this product is typically in the range of 0.8 Pa ⁇ s to 10 Pa ⁇ s, and more particularly in the range from 1.2 Pa ⁇ s to 8 Pas.
  • the product is in the form of a gel.
  • the use of the dispensing head of the invention is easy, because a pressure moderation on the tank is sufficient to trigger the distribution of the product.
  • the flow of the product is cut off without it no burr occurs. So the product dosing can be done by the user in a flexible and precise manner.
  • the pressure can be mechanical, for example by means of a punch, or pneumatic, for example by means of an air jet compressed under high pressure.
  • the breaking or knocking operation can be made in the mold, or after demolding the dispensing head, or when using the distribution set for the first time. This last solution is particularly advantageous in that it keeps the product tightly, before its first use.
  • the smashing is carried out under the simple pressure of the product, when the user presses the deformable walls of the tank.
  • the knockout punch can be carried by the cover, so that the production of the slot is carried out when the lid is closed.
  • a cover can be provided with punch, immobilized in a semi-open position by a wedge.
  • the shim is removed and the cover is folded back into the position closing.
  • the user himself opens the slot. It thus has a guarantee of non-use of the product, Thanks to invention, this guarantee can be realized in an extremely simple and economic.
  • Figure 1 shows a partial axial section of the distribution assembly according to a first embodiment of the invention, in the storage position.
  • Figure 2 shows a partial axial section of the assembly of Figure 1 in position of use.
  • Figure 3 shows a perspective view of the assembly of Figure 1, the cover being in the open position.
  • Figures 4 and 5 show a partial axial section of two variants of realization of the elastic closure member.
  • Figures 6 and 7 respectively represent an elevational view and a axial section of another alternative embodiment of the elastic member.
  • a container 3 forming a reservoir for a product P, such as a shampoo having, for example, a viscosity of about 3 Pa ⁇ s.
  • a product P such as a shampoo having, for example, a viscosity of about 3 Pa ⁇ s.
  • This container has an oval section and is provided with an axis of symmetry A. It is compressible and formed, for example, by a thermoplastic material, such as polyethylene.
  • This container is provided with an open neck 31 of cylindrical shape, provided with a snap-on bead 32. A transition zone between the neck and the container is formed by a shoulder 33.
  • a dispensing capsule 2 On this container is fixed, by snap-fastening, a dispensing capsule 2 provided a folding protective cover 10 and an elastic closure member and distribution with a slot 5.
  • the capsule 2 comprises a body 21 of generally cylindrical or oval shape provided, from the side facing the container, from a lower end 21a and, from the side opposite, from an upper end 21b.
  • the lower end 21a of the body 21 rests on the shoulder 33 of the container.
  • the upper end 21b of the body 21 is secured to a plate 22 of the same general shape as the capsule body.
  • this tray From the side facing the neck, this tray carries a first cylindrical skirt 23, capable of engaging, frictionally, inside the neck 31.
  • This skirt 24 has an annular rib 25, suitable for cooperate with the bead 32 of the neck.
  • the plate 22 is provided with a circular distribution opening 26, eccentric relative to the axis A.
  • the edge 27 of this opening 26 is extended by a cylindrical tube 28 which carries the elastic member 4.
  • the material constituting the capsule is a material relatively rigid thermoplastic, for example polypropylene.
  • the elastic member 4 has the shape of a disc.
  • This disc is provided with a peripheral bulge 41 and a central membrane 42 in the shape of a bowl whose concavity is turned towards the inside of the capsule.
  • the bulge peripheral has a greater thickness than the central membrane 42.
  • This elastic member consists of a thermoplastic elastomeric material, for example a mixture of polypropylene and styrene block copolymers - ethylene - butylene - styrene.
  • the periphery 41 of the disc is made integral with the cylindrical tube 28 of the capsule, the connection being obtained during the molding of the capsule by biinjection of the elastomeric material which forms the elastic member, on the rigid material that forms the capsule.
  • both materials and molding conditions are chosen so that a solid bond is formed, by thermofusion and / or mechanically, between the capsule and the elastic member.
  • An annular transition zone 43 located between the peripheral bulge 41 and the central membrane 42 is provided with an annular groove and has a reduced thickness compared to the rest of the membrane.
  • each slot 5a, 5b is located at the bottom of a groove 6 (see Figure 1) made in the membrane on the side facing the container.
  • This groove has a shape in "V".
  • the bottom of the throat forms a veil with a thickness of about 0.2 mm.
  • the thickness of the veil is such that it can break by knocking at using a pressurized air jet, for example, or under product pressure itself when first used.
  • the branches of the slot form four sectors 7a-d ( Figure 3) capable of bending towards the outside of the capsule, as shown in Figure 2, under the thrust of the product.
  • the capsule 2 further comprises a concave recess 27, in the form of an arc of circle and, on the side opposite to this recess, a film hinge 20, integral with the tray 22.
  • the cover 10 is hinged, suitable for prevent, in the closed position, the untimely flow of the product P, by example during transport of the assembly.
  • a cylindrical skirt 13 is provided to be placed, in the closed position, around the tubing 28, so waterproof, the circular periphery 41 of the membrane, coming into intimate contact against the internal face of this skirt 13.
  • the cover 10 further comprises, a protuberance 14, located opposite the recess 29, as visible on the Figure 1. This protrusion, in combination with the recess 29, constitutes a grip area for easy opening of the lid.
  • FIGS. 4 and 5 represent two alternative embodiments of an elastic member, bearing the references 44 and 45. To avoid any confusion, these membranes are represented individually. It is understood that they are united with the tube 28 of the capsule.
  • FIG. 4 shows, in longitudinal section, a variant of elastic member 44, usable for the distribution of fluid products (approximately 1 Pa ⁇ s).
  • This organ is provided with a peripheral bulge 4a of thickness slightly greater than that of the central membrane 42a.
  • the membrane is flat and provided with two slots 54 in the shape of a cross. Each slot is located at the bottom of a groove 64 in section of "V", and is obtained by knocking down a zone of least thickness in the form of a veil, as indicated above.
  • Figure 5 shows, in longitudinal section, another variant of elastic member 45, usable for the distribution of medium viscosity products (about 3 Not).
  • the member 45 is provided with a peripheral bulge 4b of thickness significantly higher than that of the rest of the central membrane 42b.
  • the membrane is concave and provided with two cross-shaped slots 55. Each slot is located at the bottom of a groove 65 in section of "U”.
  • a zone device 45b, of thickness thinner than the rest of the membrane 42b, is provided on each face of the membrane, conferring, during the distribution of the product, flexibility in use.
  • FIGS. 6 and 7 represent, respectively, views in elevation and in axial section of another variant of elastic member 46.
  • This member comprises a central membrane 42c of concave shape.
  • the inner side of this membrane has three parallel grooves 56a, 56b, 56c provided, respectively, of three slots 66a, 66b, 66c.
  • An annular zone 67 of junction, thinner than the rest of the central membrane, joint this has a peripheral bulge 4c.
  • This area 67 constitutes an area of bending ensuring a flexible deformation of the membrane 42c, during the product distribution.
  • the manufacture of the dispensing head is carried out as follows. We first injects into a suitable mold a rigid capsule comprising a hinged cover, in a first rigid or semi-rigid material. In this same mold, the elastic closure member is then over-injected in a second thermoplastic elastomeric material, this member having at least one groove whose edges define an area of lesser thickness. In the mold or after release of the head, the throat 6 is opened by knockout to make the slot 5. This opening can be done using a mechanical or pneumatic knockout means, for example compressed air. It is possible to provide a knockout element mechanical (not shown) on the inside of the cover so that opening, cracking occurs when closing the cover.
  • a bead or godron 66, 67 is provided at each end 61, 62 of the groove 6 (see FIG. 1) at each end 61, 62 of the groove 6 (see FIG. 1) at each end 61, 62 of the groove 6 (see FIG. 1) .
  • This bead (or godron) can, if necessary, surround the throat completely, continuously.

Abstract

The dispensing head (1) for a viscous product comprises a rigid cap (2) and a disc (4) with a central dispensing membrane (4). A zone of least thickness is delimited by the edges of a groove (6) in the membrane which is able to be broken by exerting pressure on the membrane side. This then defines a contiguous slit (5) which can be opened by the pressure of the product for its dispensing. Each groove is surrounded by a beading (66,67).

Description

L'invention se rapporte à une tête de distribution d'un produit de consistance liquide à visqueuse comportant une capsule rigide et un organe élastique de fermeture muni d'au moins une fente de distribution fermée, apte à s'ouvrir sous la poussée du produit et à revenir dans une position initiale, lorsque cesse cette poussée. L'invention se rapporte aussi à un ensemble de distribution de produit équipé de cette tête de distribution, ainsi qu'à un procédé de fabrication de cette dernière.The invention relates to a dispensing head for a consistency product. viscous liquid comprising a rigid capsule and an elastic member for closure provided with at least one closed distribution slot, capable of opening under the thrust of the product and to return to an initial position, when this thrust. The invention also relates to a product distribution assembly equipped with this dispensing head, as well as a process for manufacturing this last.

En particulier, l'invention vise un ensemble de distribution du genre de ceux qui comprennent un réservoir semi-rigide ou souple équipe d'une tête de distribution rigide ou semi-rigide, pourvue d'un orifice de distribution élastiquement déformable.In particular, the invention relates to a distribution set of the kind of those which include a semi-rigid or flexible tank fitted with a dispensing head rigid or semi-rigid, provided with an elastically dispensing orifice deformable.

L'ensemble de distribution de l'invention est destiné, plus particulièrement, à équiper un réservoir compressible contenant le produit et permettre sa distribution dans de bonnes conditions de propreté. Ce produit peut être, notamment, un produit cosmétique, dermatologique ou alimentaire, tel que par exemple un shampooing, un gel coiffant, un gel moussant pour la douche, un savon liquide, une crème faciale, une lotion corporelle, un fard liquide, ou bien un produit ménager ou une colle.The distribution assembly of the invention is intended, more particularly, to equip a compressible tank containing the product and allow its distribution in good conditions of cleanliness. This product can be, in particular, a cosmetic, dermatological or food product, such as by example a shampoo, a styling gel, a foaming shower gel, a liquid soap, face cream, body lotion, liquid eyeshadow, or household product or glue.

On connaít, par le document GB-A-1 476 620, un tube de produit liquide équipé d'une tête de distribution. Cette tête de distribution comporte une capsule rigide pourvue d'un orifice de sortie de produit sous forme d'une membrane élastique rapportée, dans laquelle est pratiquée, par découpage mécanique, une fente. Une bague de fixation maintient la membrane sur la tête de distribution. Lorsque l'utilisateur exerce une pression sur le tube, les bords de la fente s'écartent sous la poussée du produit et se referment lorsque cesse la poussée de produit. Les bords de la fente sont jointifs, ce qui rend superflu la fermeture de l'orifice de sortie par un bouchon.We know from GB-A-1 476 620, a tube of liquid product equipped a distribution head. This dispensing head has a rigid capsule provided with a product outlet orifice in the form of an elastic membrane reported, in which is made, by mechanical cutting, a slot. A fixing ring holds the membrane on the dispensing head. When the user exerts pressure on the tube, the edges of the slot move apart under the product pushing and close when the product pushing stops. The edges of the slot are contiguous, making it unnecessary to close the orifice of outlet through a plug.

Cependant, ce tube présente des inconvénients du point de vue de sa fabrication. En effet, l'assemblage de la tête en deux ou trois pièces distinctes (capsule, membrane, bague de fixation de cette dernière), nécessite le recours à une machine d'assemblage spéciale augmentant le prix de fabrication. En outre, la réalisation de la fente est effectuée, notamment, par découpe nécessitant la reprise de la membrane dans une autre machine, ce qui augmente encore considérablement le prix de revient de la tête de distribution de l'art antérieur.However, this tube has drawbacks from the point of view of its manufacturing. Indeed, the assembly of the head into two or three separate parts (capsule, membrane, fixing ring of the latter), requires the use of a special assembly machine increasing the manufacturing price. In addition, the production of the slit is carried out, in particular, by cutting requiring the recovery of the membrane in another machine, which further increases considerably the cost price of the dispensing head of the prior art.

On connaít par ailleurs, par exemple par les documents EP-A-0 545 678 et US-A-5 339 995, une tête de distribution comportant une membrane circulaire fendue munie d'un manchon de fixation périphérique replié en « U ». Comme dans la réalisation selon le document GB-A-1 476 620 précité, les bords de la fente sont obtenus par découpe mécanique de la fente. En conséquence, cette tête de distribution est onéreuse et économiquement désavantageuse. Pour cette raison, elle ne convient pas, notamment, pour un produit de large diffusion, comme un shampooing ou un produit pour le nettoyage de la vaisselle, pour lequel le prix de vente doit être modéré. We also know, for example from documents EP-A-0 545 678 and US-A-5 339 995, a dispensing head comprising a circular membrane split with a peripheral fixing sleeve folded into a "U" shape. As in the embodiment according to GB-A-1 476 620 cited above, the edges of the slot are obtained by mechanical cutting of the slot. Consequently, this distribution head is expensive and economically disadvantageous. For for this reason, it is not suitable, in particular, for a widely distributed product, like a shampoo or dishwashing detergent, for which the sale price must be moderate.

On connaít, en outre, le document EP-A-0 111 798, décrivant une tête de distribution comportant une capsule rigide et un organe élastique de fermeture et de distribution, solidaire de la capsule. Selon ce document, l'organe de fermeture élastique comporte une fente formée par deux lèvres parallèles, situées notamment en saillie sur la face extérieure de l'organe élastique, de sorte qu'un évidement est formé sur la face intérieure de l'organe, dans une zone à proximité des bords des lèvres.We also know the document EP-A-0 111 798, describing a head of dispenser comprising a rigid capsule and an elastic closure member and distribution, integral with the capsule. According to this document, the elastic closure has a slot formed by two parallel lips, located in particular projecting from the outer face of the elastic member, so that a recess is formed on the inner face of the organ, in a area near the edges of the lips.

La présente invention a pour but, de fournir un ensemble de distribution de fabrication simple et d'un prix de revient extrêmement avantageux.The object of the present invention is to provide a distribution assembly for simple to manufacture and extremely cost-effective.

La demanderesse a découvert qu'on pouvait réaliser sur une seule et même machine, d'une part l'injection de la capsule et de l'organe élastique, et d'autre part la réalisation d'une fente à bords jointifs dans celle-ci. En effet, selon l'invention, la fente de distribution de l'organe élastique n'est pas obtenue par découpe mécanique, mais par défoncement à l'aide d'un outil convenable d'une zone de moindre épaisseur, par exemple mécaniquement ou pneumatiquement. Ce défoncement peut être, notamment une pression exercée d'un côté ou de l'autre de l'organe élastique sur la zone de moindre épaisseur. En particulier, en réalisant la fente de l'organe élastique par défoncement, la demanderesse a constaté qu'on pouvait réduire le prix de fabrication d'une tête de distribution d'un tiers voire un quart, par rapport au prix de fabrication d'une tête de distribution classique qui comporte une membrane à fente obtenue par découpe mécanique.The Applicant has discovered that one and the same can be carried out machine, on the one hand the injection of the capsule and the elastic member, and on the other hand apart from making a slot with contiguous edges therein. Indeed, according to the invention, the distribution slot of the elastic member is not obtained by mechanical cutting, but by knocking down using a suitable tool of a thinner area, for example mechanically or pneumatically. This knockout can be, in particular a pressure exerted on one side or the other of the elastic member on the area of reduced thickness. In particular, in making the slit in the elastic member by knocking out, the applicant has found that we could reduce the manufacturing price of a distribution head a third or even a quarter, compared to the manufacturing price of a head conventional distribution which comprises a slit membrane obtained by cutting mechanical.

Ainsi, la présente invention se rapporte à une tête de distribution de produit de consistance liquide à visqueuse, comportant une capsule rigide ou semi-rigide et un organe élastique de fermeture solidaire de la capsule. Conformément à l'invention, la tête de distribution se caractérise en ce qu'une zone de moindre épaisseur est délimitée par les bords d'une gorge réalisée dans l'organe élastique, la zone de moindre épaisseur étant apte à se rompre sous l'effet d'une pression exercée d'un côté ou de l'autre de l'organe élastique de manière à définir au moins une fente jointive apte à s'ouvrir sous la poussée du produit en vue de sa distribution, et revenir en position jointive lorsque cesse cette poussée.Thus, the present invention relates to a product dispensing head of liquid viscous consistency, comprising a rigid or semi-rigid capsule and an elastic closure member secured to the capsule. In accordance with the invention, the dispensing head is characterized in that a smaller area thickness is delimited by the edges of a groove made in the organ elastic, the thinner zone being able to rupture under the effect of pressure exerted on one side or the other of the elastic member so defining at least one contiguous slot capable of opening under the thrust of the product for distribution, and return to the joined position when this thrust.

Avantageusement, l'organe élastique de fermeture se présente sous forme d'une membrane plus ou moins épaisse, disposée en bout d'un canal d'alimentation ménagé dans la capsule et en communication avec un réservoir contenant le produit à distribuer.Advantageously, the elastic closure member is in the form a more or less thick membrane, placed at the end of a channel supply in the capsule and in communication with a reservoir containing the product to be distributed.

Généralement, la capsule est formée d'un premier matériau thermoplastique rigide ou semi-rigide, par exemple de polyéthylène ou de polypropylène. Cette capsule est fixée, par exemple par vissage ou claquage, sur le réservoir de produit à distribuer. Avantageusement, ce flacon est semi-rigide ou souple, muni de parois compressibles, de sorte qu'une pression sur les parois du flacon déclenche la distribution du produit. De façon avantageuse, la capsule est munie d'un canal de distribution fermé par l'organe élastique. Generally, the capsule is formed from a first thermoplastic material rigid or semi-rigid, for example polyethylene or polypropylene. This capsule is fixed, for example by screwing or snapping, on the reservoir product to distribute. Advantageously, this bottle is semi-rigid or flexible, provided of compressible walls, so that a pressure on the walls of the bottle triggers the distribution of the product. Advantageously, the capsule is provided a distribution channel closed by the elastic member.

Selon un aspect intéressant de l'invention, la fente est réalisée par défoncement de la membrane. En effet, la gorge constituant une zone de pré-affaiblissement, par exemple sous forme d'un voile, peut être ouverte par défoncement, soit mécaniquement à l'aide d'un outil approprié, soit par voie pneumatique, à l'aide d'un jet d'air comprimé. Afin de circonscrire la fente sur une longueur précise, la fente peut être entourée, de manière continue ou discontinue, d'un bourrelet ou godron de renforcement. Le défoncement de la zone de moindre épaisseur peut être effectuée, notamment, soit du côté interne, soit du côte externe de la membrane.According to an interesting aspect of the invention, the slot is made by knocking out of the membrane. Indeed, the throat constituting a zone of pre-weakening, for example in the form of a veil, can be opened by knocking, or mechanically using an appropriate tool, either pneumatically, using a jet of compressed air. In order to circumscribe the slot over a specific length, the slot may be surrounded, continuously or discontinuously, by a bead or reinforcement godron. The knockout of the thinner area can be carried out, in particular, either on the internal side or on the external side of the membrane.

La fente ainsi réalisée constitue un orifice de distribution, sensiblement étanche à l'écoulement intempestif du produit. Les bords de cette fente s'écartent l'un de l'autre, lorsque l'utilisateur exerce une pression sur le flacon retourné, tête en bas, pour provoquer la distribution d'une dose de produit. Grâce à l'élasticité de la membrane, la fente reprend sa forme d'origine, lorsque cesse la pression sur le flacon, et l'écoulement du produit s'arrête net.The slot thus formed constitutes a dispensing orifice, substantially sealed to the untimely flow of the product. The edges of this slot deviate from one of the other, when the user exerts pressure on the inverted bottle, head in low, to cause the distribution of a dose of product. Thanks to the elasticity of the membrane, the slit returns to its original shape, when the pressure on the bottle, and the flow of the product stops completely.

Généralement, cet organe élastique est une membrane en un second matériau élastomérique, et plus particulièrement en élastomère thermoplastique. Plus précisément, cette membrane est formée par un matériau souple, ayant une mémoire de forme capable de reprendre, après déformation, sa forme initiale. Avantageusement ce matériau est choisi de sorte que la membrane puisse être moulée en une seule et unique pièce avec la capsule, par exemple par biinjection des premier et second matériaux. A cet effet, comme second matériau, on choisit un élastomère physiquement et chimiquement compatible avec le premier matériau de la capsule et capable de former avec celui-ci une liaison solide, par thermofusion. Typiquement, la membrane est constituée, par exemple, par les mélanges de polypropylène et de copolymères de bloc de styrène - butadiène - styrène, de polypropylène et de copolymères de bloc de styrène - éthylène - butylène - styrène, de polypropylène et de copolymères de bloc d'éthylène - propylène - diène.Generally, this elastic member is a membrane made of a second material elastomeric, and more particularly in thermoplastic elastomer. More precisely, this membrane is formed by a flexible material, having a shape memory capable of resuming, after deformation, its initial shape. Advantageously, this material is chosen so that the membrane can be molded in a single piece with the capsule, for example by biinjection first and second materials. For this purpose, as a second material, we choose an elastomer that is physically and chemically compatible with the first material of the capsule and capable of forming a bond with it solid, by thermofusion. Typically, the membrane is constituted, by example, by blends of polypropylene and block copolymers styrene - butadiene - styrene, polypropylene and block copolymers styrene - ethylene - butylene - styrene, polypropylene and copolymers of block of ethylene - propylene - diene.

De façon générale, la membrane se présente sous forme de rondelle d'épaisseur variable. Il est cependant possible de la réaliser dans toute autre forme désirable, par exemple ovale. La surface de cette rondelle peut être plate, mais avantageusement, cette surface est bombée, par exemple concave ou convexe. Plus particulièrement, on préfère une membrane convexe dont la convexité est tournée du côté où la poussée de produit est exercée.Generally, the membrane is in the form of a washer of variable thickness. It is however possible to carry it out in any other desirable shape, for example oval. The surface of this washer can be flat, but advantageously, this surface is curved, for example concave or convex. More particularly, a convex membrane is preferred whose convexity is turned to the side where the product push is exerted.

La fente pratiquée dans la membrane passe, de préférence, par le centre de la rondelle. Conformément à l'invention, cette fente est située au fond d'une gorge ménagée dans la membrane. Cette gorge, rectiligne ou curviligne, présente avantageusement une section en « V » ou en « U ». Elle peut être réalisée en plusieurs branches. On peut réaliser deux ou plusieurs gorges. Ces gorges peuvent être parallèles ou croisées. The slit in the membrane preferably passes through the center of the washer. According to the invention, this slot is located at the bottom of a groove formed in the membrane. This throat, straight or curvilinear, presents advantageously a “V” or “U” section. It can be done in several branches. Two or more grooves can be made. These gorges can be parallel or crossed.

Selon une forme préférée de l'invention, la membrane comporte deux gorges croisées, formant entre elles un angle droit. La profondeur de cette gorge représente, de façon avantageuse, 30 % à 90 % de l'épaisseur totale de la membrane. Avantageusement, l'épaisseur totale de la membrane est située entre 0,5 mm et 3 mm. Typiquement, une telle gorge présente une longueur d'environ 0,5 cm à 2,5 cm. De façon avantageuse, le fond de la gorge est formé par une zone de moindre épaisseur sous forme d'un voile d'une épaisseur d'environ 0,1 mm à 1 mm.According to a preferred form of the invention, the membrane has two grooves crossed, forming a right angle between them. The depth of this gorge advantageously represents 30% to 90% of the total thickness of the membrane. Advantageously, the total thickness of the membrane is located between 0.5 mm and 3 mm. Typically, such a groove has a length from about 0.5 cm to 2.5 cm. Advantageously, the bottom of the throat is formed by an area of lesser thickness in the form of a thick veil from about 0.1 mm to 1 mm.

La capsule peut comporter, en outre, un couvercle rabattable apte à être placé sur l'organe élastique et destiné à assurer la protection de la membrane pendant le stockage du produit. Avantageusement, ce couvercle est articulé avec la capsule, de préférence, à l'aide d'une charnière-film. Ceci permet le moulage intégrale en une seule et unique pièce de la tête de distribution (capsule - charnière - couvercle - membrane avec la fente). La face interne du couvercle peut comporter un ou plusieurs moyens d'étanchéité, aptes à venir en appui sur l'organe élastique. Ainsi, sa face interne peut comporter un bourrelet annulaire, apte à entourer la fente et se plaquer, de façon étanche, contre la membrane.The capsule may further include a hinged cover capable of being placed on the elastic member and intended to ensure the protection of the membrane during product storage. Advantageously, this cover is articulated with the capsule, preferably, using a film hinge. This allows molding integral in a single piece of the dispensing head (capsule - hinge - cover - membrane with slot). The inside of the cover may include one or more sealing means, capable of coming to bear on the elastic organ. Thus, its internal face may include an annular bead, able to surround the slot and press tightly against the membrane.

Un ensemble de distribution muni d'un réservoir de produit et comportant la tête de distribution conforme à l'invention, est utilisable, notamment, pour la distribution d'un produit de consistance liquide à visqueuse. La viscosité de ce produit se situe typiquement dans la gamme allant de 0,8 Pa·s à 10 Pa·s, et plus particulièrement dans la gamme allant de 1,2 Pa·s à 8 Pas. Avantageusement, le produit se présente sous forme d'un gel.A distribution assembly provided with a product reservoir and comprising the head dispenser according to the invention, can be used, in particular, for the distribution of a liquid viscous consistency product. The viscosity of this product is typically in the range of 0.8 Pa · s to 10 Pa · s, and more particularly in the range from 1.2 Pa · s to 8 Pas. Advantageously, the product is in the form of a gel.

L'utilisation de la tête de distribution de l'invention est aisée, car une pression modérée sur le réservoir est suffisante pour déclencher la distribution du produit.The use of the dispensing head of the invention is easy, because a pressure moderation on the tank is sufficient to trigger the distribution of the product.

Après la distribution de produit, l'écoulement de celui-ci est coupé net, sans qu'il ne se produise de bavure. Ainsi le dosage de produit peut être effectué par l'utilisateur de manière souple et précise.After the product has been dispensed, the flow of the product is cut off without it no burr occurs. So the product dosing can be done by the user in a flexible and precise manner.

Un autre objet encore de l'invention est constitué par un procédé de fabrication de la capsule. Ce procédé, consiste à effectuer successivement les étapes suivantes :

  • injecter dans un moule approprié une capsule rigide comprenant un couvercle articulé, en un premier matériau rigide ou semi-rigide,
  • surinjecter un organe élastique de fermeture en un second matériau élastomérique thermoplastique en réalisant une gorge, dont les bords délimitent une zone de moindre épaisseur ; et
  • au moyen d'une pression exercée d'un côté ou de l'autre de l'organe élastique, provoquer la rupture de la zone de moindre épaisseur de manière à former au moins une fente à bords jointifs.
Yet another object of the invention is constituted by a method of manufacturing the capsule. This process consists in successively carrying out the following steps:
  • injecting into a suitable mold a rigid capsule comprising an articulated cover, made of a first rigid or semi-rigid material,
  • over-injecting an elastic closure member in a second thermoplastic elastomeric material by producing a groove, the edges of which delimit an area of reduced thickness; and
  • by means of a pressure exerted on one side or the other of the elastic member, causing the rupture of the zone of reduced thickness so as to form at least one slot with contiguous edges.

La pression peut être de nature mécanique, par exemple au moyen d'un poinçon, ou de nature pneumatique, par exemple au moyen d'un jet d'air comprimé sous forte pression. L'opération de rupture ou défoncement peut être effectuée dans le moule, ou bien après démoulage de la tête de distribution, ou lors de la première utilisation de l'ensemble de distribution. Cette dernière solution est particulièrement avantageuse en ce qu'elle permet de conserver le produit de manière étanche, avant sa première utilisation. Le défoncement s'effectue sous la simple pression du produit, lorsque l'utilisateur appuie sur les parois déformables du réservoir.The pressure can be mechanical, for example by means of a punch, or pneumatic, for example by means of an air jet compressed under high pressure. The breaking or knocking operation can be made in the mold, or after demolding the dispensing head, or when using the distribution set for the first time. This last solution is particularly advantageous in that it keeps the product tightly, before its first use. The smashing is carried out under the simple pressure of the product, when the user presses the deformable walls of the tank.

Selon un aspect intéressant de l'invention, le poinçon de défoncement peut être porté par le couvercle, de sorte que la réalisation de la fente s'effectue au moment de la fermeture du couvercle. Dans ce cas, on peut prévoir un couvercle à poinçon, immobilisé dans une position semi-ouverte par une cale. Lors de la première utilisation, la cale est retirée et le couvercle est rabattu dans la position de fermeture. Par cette opération, l'utilisateur lui-même effectue l'ouverture de la fente. Il dispose ainsi d'une garantie de non-utilisation du produit, Grâce à l'invention, cette garantie peut être réalisée de façon extrêmement simple et économique.According to an interesting aspect of the invention, the knockout punch can be carried by the cover, so that the production of the slot is carried out when the lid is closed. In this case, a cover can be provided with punch, immobilized in a semi-open position by a wedge. When first use, the shim is removed and the cover is folded back into the position closing. By this operation, the user himself opens the slot. It thus has a guarantee of non-use of the product, Thanks to invention, this guarantee can be realized in an extremely simple and economic.

Pour mieux faire comprendre la présente invention, on va décrire maintenant, à titre d'exemples purement illustratifs et nullement limitatifs, plusieurs modes de réalisation d'une tête et d'un ensemble de distribution conforme à l'invention, représentés sur les dessins annexés.To better understand the present invention, we will now describe, at title of examples purely illustrative and in no way limiting, several modes of production of a head and of a distribution assembly in accordance with the invention, shown in the accompanying drawings.

La figure 1 représente une coupe axiale partielle de l'ensemble de distribution selon un premier mode de réalisation de l'invention, en position de stockage.Figure 1 shows a partial axial section of the distribution assembly according to a first embodiment of the invention, in the storage position.

La figure 2 représente une coupe axiale partielle de l'ensemble de la figure 1 en position d'utilisation.Figure 2 shows a partial axial section of the assembly of Figure 1 in position of use.

La figure 3 représente une vue en perspective de l'ensemble de la figure 1, le couvercle étant en position ouverte.Figure 3 shows a perspective view of the assembly of Figure 1, the cover being in the open position.

Les figures 4 et 5 représentent une coupe axiale partielle de deux variantes de réalisation de l'organe élastique de fermeture.Figures 4 and 5 show a partial axial section of two variants of realization of the elastic closure member.

Les figures 6 et 7 représentent respectivement, une vue en élévation et une coupe axiale d'une autre variante de réalisation de l'organe élastique.Figures 6 and 7 respectively represent an elevational view and a axial section of another alternative embodiment of the elastic member.

En référence à ces figures, notamment aux figures 1 à 3, on peut voir la partie supérieure d'un récipient 3 formant réservoir pour un produit P, tel qu'un shampooing ayant, par exemple, une viscosité d'environ 3 Pa·s. Ce récipient présente une section ovale et est pourvu d'un axe de symétrie A. Il est compressible et formé, par exemple, par un matériau thermoplastique, tel que du polyéthylène. Ce récipient est pourvu d'un goulot 31 ouvert de forme cylindrique, muni d'un bourrelet d'encliquetage 32. Une zone de transition entre le goulot et le récipient est formé par un épaulement 33. With reference to these figures, in particular to Figures 1 to 3, we can see the part top of a container 3 forming a reservoir for a product P, such as a shampoo having, for example, a viscosity of about 3 Pa · s. This container has an oval section and is provided with an axis of symmetry A. It is compressible and formed, for example, by a thermoplastic material, such as polyethylene. This container is provided with an open neck 31 of cylindrical shape, provided with a snap-on bead 32. A transition zone between the neck and the container is formed by a shoulder 33.

Sur ce récipient est fixé, par encliquetage, une capsule de distribution 2 muni d'un couvercle de protection 10 rabattable et d'un organe élastique de fermeture et de distribution muni d'une fente 5.On this container is fixed, by snap-fastening, a dispensing capsule 2 provided a folding protective cover 10 and an elastic closure member and distribution with a slot 5.

La capsule 2 comporte un corps 21 de forme générale cylindrique ou ovale muni, du côté tourné vers le récipient, d'une extrémité inférieure 21a et, du côté opposé, d'une extrémité supérieure 21b.The capsule 2 comprises a body 21 of generally cylindrical or oval shape provided, from the side facing the container, from a lower end 21a and, from the side opposite, from an upper end 21b.

L'extrémité inférieure 21a du corps 21 repose sur l'épaulement 33 du récipient. L'extrémité supérieure 21b du corps 21 est solidaire d'un plateau 22 de la même forme générale que le corps de la capsule. Du côte tourné vers le goulot, ce plateau porte une première jupe cylindrique 23, apte à s'engager, à friction, à l'intérieur du goulot 31. Une seconde jupe cylindrique 24, concentrique à la première et d'étendue plus importante que celle-ci, entoure, de façon étanche, l'extérieur du goulot. Cette jupe 24 comporte une nervure annulaire 25, apte a coopérer avec le bourrelet 32 du goulot.The lower end 21a of the body 21 rests on the shoulder 33 of the container. The upper end 21b of the body 21 is secured to a plate 22 of the same general shape as the capsule body. From the side facing the neck, this tray carries a first cylindrical skirt 23, capable of engaging, frictionally, inside the neck 31. A second cylindrical skirt 24, concentric with the first and of greater extent than this, surrounds, in a sealed manner, the outside of the neck. This skirt 24 has an annular rib 25, suitable for cooperate with the bead 32 of the neck.

Le plateau 22 est pourvu d'une ouverture de distribution circulaire 26, excentrée par rapport à l'axe A. Le bord 27 de cette ouverture 26 est prolongée par une tubulure cylindrique 28 qui porte l'organe élastique 4.The plate 22 is provided with a circular distribution opening 26, eccentric relative to the axis A. The edge 27 of this opening 26 is extended by a cylindrical tube 28 which carries the elastic member 4.

Avantageusement le matériau constituant la capsule est un matériau thermoplastique relativement rigide, par exemple du polypropylène.Advantageously, the material constituting the capsule is a material relatively rigid thermoplastic, for example polypropylene.

L'organe élastique 4 a la forme d'un disque. Ce disque est pourvu d'un renflement périphérique 41 et d'une membrane centrale 42 en forme de cuvette dont la concavité est tournée vers l'intérieur de la capsule. Le renflement périphérique a une épaisseur plus importante que la membrane centrale 42. Cet organe élastique est constitué par un matériau élastomérique thermoplastique, par exemple un mélange de polypropylène et de copolymères de bloc de styrène - éthylène - butylène - styrène.The elastic member 4 has the shape of a disc. This disc is provided with a peripheral bulge 41 and a central membrane 42 in the shape of a bowl whose concavity is turned towards the inside of the capsule. The bulge peripheral has a greater thickness than the central membrane 42. This elastic member consists of a thermoplastic elastomeric material, for example a mixture of polypropylene and styrene block copolymers - ethylene - butylene - styrene.

La périphérie 41 du disque est rendue solidaire de la tubulure cylindrique 28 de la capsule, la solidarisation étant obtenu lors du moulage de la capsule par biinjection du matériau élastomérique qui forme l'organe élastique, sur le matériau rigide qui forme la capsule. De façon générale, les deux matières et les conditions de moulage sont choisis de sorte qu'une liaison solide se forme, par thermofusion et/ou mécaniquement, entre la capsule et l'organe élastique.The periphery 41 of the disc is made integral with the cylindrical tube 28 of the capsule, the connection being obtained during the molding of the capsule by biinjection of the elastomeric material which forms the elastic member, on the rigid material that forms the capsule. In general, both materials and molding conditions are chosen so that a solid bond is formed, by thermofusion and / or mechanically, between the capsule and the elastic member.

Une zone de transition annulaire 43, située entre le renflement périphérique 41 et la membrane centrale 42 est pourvu d'une gorge annulaire et présente une épaisseur réduite par rapport au reste de la membrane. Par cette disposition, on obtient une membrane particulièrement flexible.An annular transition zone 43, located between the peripheral bulge 41 and the central membrane 42 is provided with an annular groove and has a reduced thickness compared to the rest of the membrane. By this provision, we obtains a particularly flexible membrane.

Dans la membrane centrale 42 sont pratiquées deux fentes croisées 5a, 5b (voir figure 3) à branches de longueur égale, formant entre elles un angle droit. Chaque fente 5a, 5b est située au fond d'une gorge 6 (voir figure 1) pratiquée dans la membrane du côté tourné vers le récipient. Cette gorge a une forme en « V ». Le fond de la gorge forme un voile d'une épaisseur d'environ 0,2 mm. L'épaisseur du voile est telle que celui-ci peut se rompre par défoncement au moyen d'un jet d'air sous pression, par exemple, ou sous la pression du produit lui-même lors de la première utilisation. Après rupture du voile, les branches de la fente forment quatre secteurs 7a-d (figure 3) aptes à fléchir vers l'extérieur de la capsule, comme représenté à la figure 2, sous la poussée du produit. A cet effet, l'utilisateur maintient le récipient dans une position semblable à celle montrée à la figure 2, en exerçant une légère pression sur le récipient 3 pour distribuer une dose de produit P. Cette pression est symbolisée par les flèches F. La distribution s'arrête, lorsque cesse la pression sur le récipient. Lorsque le récipient est maintenu sans pression dans cette position, aucun écoulement de produit n'est observé.In the central membrane 42 are made two crossed slits 5a, 5b (see Figure 3) with branches of equal length, forming a right angle between them. Each slot 5a, 5b is located at the bottom of a groove 6 (see Figure 1) made in the membrane on the side facing the container. This groove has a shape in "V". The bottom of the throat forms a veil with a thickness of about 0.2 mm. The thickness of the veil is such that it can break by knocking at using a pressurized air jet, for example, or under product pressure itself when first used. After breaking the veil, the branches of the slot form four sectors 7a-d (Figure 3) capable of bending towards the outside of the capsule, as shown in Figure 2, under the thrust of the product. In this effect, the user holds the container in a position similar to that shown in Figure 2, applying light pressure on the container 3 to distribute a dose of product P. This pressure is symbolized by the arrows F. The dispensing stops when the pressure on the container ceases. When the container is kept without pressure in this position, no flow of product is not observed.

La capsule 2 comporte, en outre, un évidement concave 27, en forme d'arc de cercle et, du côté opposé à cet évidement, une charnière-film 20, solidaire du plateau 22. A l'aide de cette charnière est articulé le couvercle 10, apte à empêcher, en position de fermeture, l'écoulement intempestif du produit P, par exemple lors du transport de l'ensemble. Une jupe cylindrique 13, est prévue pour se placer, en position de fermeture, autour de la tubulure 28, de façon étanche, la périphérie circulaire 41 de la membrane, venant en contact intime contre la face interne de cette jupe 13.The capsule 2 further comprises a concave recess 27, in the form of an arc of circle and, on the side opposite to this recess, a film hinge 20, integral with the tray 22. With the help of this hinge, the cover 10 is hinged, suitable for prevent, in the closed position, the untimely flow of the product P, by example during transport of the assembly. A cylindrical skirt 13 is provided to be placed, in the closed position, around the tubing 28, so waterproof, the circular periphery 41 of the membrane, coming into intimate contact against the internal face of this skirt 13.

Sur la face frontale de la tête de distribution, le couvercle 10 comporte, de plus, une protubérance 14, située en face de l'évidement 29, comme visible sur la figure 1. Cette protubérance, en combinaison avec l'évidement 29, constitue une zone de préhension facilitant l'ouverture du couvercle.On the front face of the dispensing head, the cover 10 further comprises, a protuberance 14, located opposite the recess 29, as visible on the Figure 1. This protrusion, in combination with the recess 29, constitutes a grip area for easy opening of the lid.

Les figures 4 et 5 représentent deux variantes de réalisation d'organe élastique, portant les références 44 et 45. Pour éviter toute confusion, ces membranes sont représentées de façon individuelle. ll est bien entendu qu'elles sont solidaires de la tubulure 28 de la capsule.FIGS. 4 and 5 represent two alternative embodiments of an elastic member, bearing the references 44 and 45. To avoid any confusion, these membranes are represented individually. It is understood that they are united with the tube 28 of the capsule.

La figure 4 montre, en coupe longitudinale, une variante d'organe élastique 44, utilisable pour la distribution de produits fluides (environ 1 Pa·s). Cet organe est pourvu d'un renflement périphérique 4a d'épaisseur légèrement supérieure à celle de la membrane centrale 42a. La membrane est plane et munie de deux fentes 54 en forme de croix. Chaque fente est située au fond d'une gorge 64 en section de « V », et est obtenue par défoncement d'une zone de moindre épaisseur sous forme d'un voile, comme indiqué précédemment.FIG. 4 shows, in longitudinal section, a variant of elastic member 44, usable for the distribution of fluid products (approximately 1 Pa · s). This organ is provided with a peripheral bulge 4a of thickness slightly greater than that of the central membrane 42a. The membrane is flat and provided with two slots 54 in the shape of a cross. Each slot is located at the bottom of a groove 64 in section of "V", and is obtained by knocking down a zone of least thickness in the form of a veil, as indicated above.

La figure 5 montre, en coupe longitudinale, une autre variante d'organe élastique 45, utilisable pour la distribution de produits de viscosité moyenne (environ 3 Pa·s). L'organe 45 est pourvu d'un renflement périphérique 4b d'épaisseur nettement supérieure à celle du reste de la membrane centrale 42b. La membrane est concave et munie de deux fentes 55 en forme de croix. Chaque fente est située au fond d'une gorge 65 en section de « U ». Une zone périphérique 45b, d'épaisseur plus mince que le reste de la membrane 42b, est prévue sur chaque face de la membrane, conférant, lors de la distribution du produit, de la souplesse à l'utilisation.Figure 5 shows, in longitudinal section, another variant of elastic member 45, usable for the distribution of medium viscosity products (about 3 Not). The member 45 is provided with a peripheral bulge 4b of thickness significantly higher than that of the rest of the central membrane 42b. The membrane is concave and provided with two cross-shaped slots 55. Each slot is located at the bottom of a groove 65 in section of "U". A zone device 45b, of thickness thinner than the rest of the membrane 42b, is provided on each face of the membrane, conferring, during the distribution of the product, flexibility in use.

Les figures 6 et 7 représentent, respectivement, des vues en élévation et en coupe axiale d'une autre variante d'organe élastique 46. Cet organe comporte une membrane centrale 42c de forme concave. La face interne de cette membrane comporte trois gorges parallèles 56a, 56b, 56c pourvues, respectivement, de trois fentes 66a, 66b, 66c. Une zone annulaire 67 de jonction, d'épaisseur plus faible que celle du reste de la membrane centrale, joint celle-ci à un renflement périphérique 4c. Cette zone 67 constitue une zone de flexion assurant une déformation en souplesse de la membrane 42c, lors de la distribution du produit.FIGS. 6 and 7 represent, respectively, views in elevation and in axial section of another variant of elastic member 46. This member comprises a central membrane 42c of concave shape. The inner side of this membrane has three parallel grooves 56a, 56b, 56c provided, respectively, of three slots 66a, 66b, 66c. An annular zone 67 of junction, thinner than the rest of the central membrane, joint this has a peripheral bulge 4c. This area 67 constitutes an area of bending ensuring a flexible deformation of the membrane 42c, during the product distribution.

La fabrication de la tête de distribution s'effectue de la manière suivante. On injecte d'abord dans un moule approprié une capsule rigide comprenant un couvercle articulé, en un premier matériau rigide ou semi-rigide. Dans ce même moule, on surinjecte ensuite l'organe élastique de fermeture en un second matériau élastomérique thermoplastique, cet organe présentant au moins une gorge dont les bords délimitent une zone de moindre épaisseur. Dans le moule ou après démoulage de la tête, on provoque l'ouverture de la gorge 6 par défoncement pour réaliser la fente 5. Cette ouverture peut être effectuée à l'aide d'un moyen de défoncement mécanique ou par voie pneumatique, par exemple de l'air comprimé. Il est possible de ménager un élément de défoncement mécanique (non représenté) sur la face interne du couvercle de sorte que l'ouverture, de la fente se produise lors de la fermeture du couvercle.The manufacture of the dispensing head is carried out as follows. We first injects into a suitable mold a rigid capsule comprising a hinged cover, in a first rigid or semi-rigid material. In this same mold, the elastic closure member is then over-injected in a second thermoplastic elastomeric material, this member having at least one groove whose edges define an area of lesser thickness. In the mold or after release of the head, the throat 6 is opened by knockout to make the slot 5. This opening can be done using a mechanical or pneumatic knockout means, for example compressed air. It is possible to provide a knockout element mechanical (not shown) on the inside of the cover so that opening, cracking occurs when closing the cover.

Pour éviter un déchirement excessif de la membrane 4 lors de son ouverture par défoncement, avantageusement, à chaque extrémité 61, 62 de la gorge 6 (voir figure 1) est prévu un bourrelet ou godron 66, 67. Ce bourrelet (ou godron) peut, le cas échéant, entourer la gorge entièrement, de façon continue.To avoid excessive tearing of the membrane 4 when it is opened by knockout, advantageously, at each end 61, 62 of the groove 6 (see FIG. 1) a bead or godron 66, 67 is provided. This bead (or godron) can, if necessary, surround the throat completely, continuously.

Claims (22)

Tête de distribution (1) d'un produit (P) de consistance liquide à visqueuse, comportant une capsule rigide (2) et un organe élastique (4) de fermeture et de distribution, solidaire de la capsule (2), caractérisée en ce qu'une zone de moindre épaisseur est délimitée par les bords d'une gorge (6) réalisée dans l'organe élastique, la zone de moindre épaisseur étant apte à se rompre sous l'effet d'une pression exercée d'un côté ou de l'autre de l'organe élastique (4) de manière à définir au moins une fente jointive (5, 5a, 5b) apte à s'ouvrir sous la poussée du produit (P) en vue de sa distribution, et revenir en position jointive lorsque cesse cette poussée.Dispensing head (1) of a product (P) of viscous liquid consistency, comprising a rigid capsule (2) and an elastic closure member (4) and distribution, integral with the capsule (2), characterized in that a zone of lesser thickness is delimited by the edges of a groove (6) produced in the elastic member, the thinner zone being capable of breaking under the effect of pressure exerted on one side or the other of the elastic member (4) so as to define at least one contiguous slot (5, 5a, 5b) capable of opening under the thrust of the product (P) for its distribution, and return to contiguous position when this push ceases. Tête de distribution selon la revendication 1, caractérisée en ce que l'organe élastique (4) est une membrane en matériau élastomérique.Dispensing head according to claim 1, characterized in that the member elastic (4) is a membrane made of elastomeric material. Tête de distribution selon la revendication 1 ou 2, caractérisée en ce que la pression exercée d'un côté ou de l'autre de l'organe élastique (4) est une pression mécanique ou pneumatique..Dispensing head according to claim 1 or 2, characterized in that the pressure exerted on one side or the other of the elastic member (4) is a mechanical or pneumatic pressure. Tête de distribution selon l'une des revendications 1 à 3, caractérisée en ce que chaque gorge (6) est entourée, au moins en partie, par un bourrelet ou godron (66, 67).Dispensing head according to one of Claims 1 to 3, characterized in that that each groove (6) is surrounded, at least in part, by a bead or godron (66, 67). Tête de distribution selon l'une des revendications 1 à 4, caractérisée en ce que l'organe élastique (4) présente une forme bombée.Dispensing head according to one of Claims 1 to 4, characterized in that that the elastic member (4) has a domed shape. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que l'organe élastique (4) et la capsule rigide (2) forment une seule et même pièce.Dispensing head according to one of the preceding claims, characterized in that the elastic member (4) and the rigid capsule (2) form a single and same room. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que la capsule (2) est formé d'un premier matériau thermoplastique rigide ou semi-rigide.Dispensing head according to one of the preceding claims, characterized in that the capsule (2) is formed from a first thermoplastic material rigid or semi-rigid. Tête de distribution selon la revendication précédente, caractérisée en ce que l'organe élastique (4) est formé d'un second matériau élastomérique thermoplastique.Dispensing head according to the preceding claim, characterized in that the elastic member (4) is formed of a second elastomeric material thermoplastic. Tête de distribution selon l'une des revendications 7 et 8, caractérisée en ce que les premier et second matériaux élastomériques sont aptes à former une liaison mécanique entre eux, par thermofusion.Dispensing head according to either of Claims 7 and 8, characterized in that that the first and second elastomeric materials are capable of forming a mechanical connection between them, by thermofusion. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que les fentes (5) sont rectilignes.Dispensing head according to one of the preceding claims, characterized in that the slots (5) are rectilinear. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que les fentes (5) sont en forme de croix. Dispensing head according to one of the preceding claims, characterized in that the slots (5) are in the form of a cross. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que la gorge (6) présente une section en « U ».Dispensing head according to one of the preceding claims, characterized in that the groove (6) has a "U" section. Tête de distribution selon l'une des revendications 1 à 11, caractérisée en ce que la gorge (6) présente une section en « V ».Dispensing head according to one of claims 1 to 11, characterized in that the groove (6) has a "V" section. Tête de distribution selon l'une des revendications précédentes, caractérisée en ce que la capsule (2) est muni d'un couvercle (10) articulé apte à être placé sur l'organe élastique (4).Dispensing head according to one of the preceding claims, characterized in that the capsule (2) is provided with a hinged cover (10) able to be placed on the elastic member (4). Tête de distribution selon la revendication 14, caractérisée en ce que le couvercle (10) comporte au moins un moyen d'étanchéité (13) apte à venir en appui contre l'organe élastique (4).Dispensing head according to claim 14, characterized in that the cover (10) comprises at least one sealing means (13) able to come in support against the elastic member (4). Ensemble de distribution comportant un réservoir (3) compressible contenant un produit (P) de consistance liquide ou visqueuse à distribuer et une tête de distribution (1) fixée sur le réservoir (3), caractérisé en ce que la tête de distribution (1) est conforme à l'une quelconque des revendications précédentes.Distribution assembly comprising a compressible reservoir (3) containing a product (P) of liquid or viscous consistency to be dispensed and a dispensing head (1) fixed on the reservoir (3), characterized in that the dispensing head (1) according to any one of the claims previous. Ensemble selon la revendication 16, caractérisé en ce que le produit (P) a une viscosité située dans la gamme allant de 0,8 Pa·s à 10 Pa·s.Assembly according to claim 16, characterized in that the product (P) has a viscosity in the range from 0.8 Pa · s to 10 Pa · s. Ensemble selon l'une des revendications 16 ou 17, caractérisé en ce que le produit (P) se présente sous forme d'un gel.Assembly according to one of claims 16 or 17, characterized in that the product (P) is in the form of a gel. Procédé de fabrication d'une tête de distribution conforme aux revendications 1 à 15 consistant à effectuer les étapes suivantes : injecter dans un moule approprié une capsule rigide comprenant un couvercle articulé, en un premier matériau rigide ou semi-rigide. surinjecter un organe élastique de fermeture en un second matériau élastomérique thermoplastique, cet organe étant muni d'une gorge, dont les bords délimitent une zone de moindre épaisseur ; et au moyen d'une pression exercée d'un côté ou de l'autre de l'organe élastique, provoquer la rupture par défoncement de la zone de moindre épaisseur, de manière à former au moins une fente à borde jointifs. Method for manufacturing a dispensing head according to Claims 1 to 15, comprising the following steps: inject into a suitable mold a rigid capsule comprising an articulated cover, made of a first rigid or semi-rigid material. over-injecting an elastic closure member in a second thermoplastic elastomeric material, this member being provided with a groove, the edges of which delimit an area of reduced thickness; and by means of a pressure exerted on one side or the other of the elastic member, causing rupture by knocking down the zone of reduced thickness, so as to form at least one slot with contiguous edges. Procédé selon la revendication 19, caractérisé en ce que la pression est exercée par un poinçon porté par le couvercle.Method according to claim 19, characterized in that the pressure is exerted by a punch carried by the cover. Procédé selon la revendication 19, caractérisé en ce que la pression est exercée par un jet d'air comprimé.Method according to claim 19, characterized in that the pressure is exerted by a jet of compressed air. Procédé selon la revendication 19, caractérisé en ce que la rupture par défoncement de la zone de moindre épaisseur est réalisée lors du moulage de la tête de distribution, ou lors de la première utilisation de ladite tête en combinaison avec un ensemble de distribution selon l'une quelconque des revendications 16 à 18.Method according to claim 19, characterized in that the rupture by the thinner area is knocked out during molding of the dispensing head, or when using said head for the first time combination with a distribution assembly according to any one of claims 16 to 18.
EP97401401A 1996-07-03 1997-06-18 Dispensing head for dispensing a liquid-like viscous product having an elastic closing means as well as dispensing assembly comprising such device Expired - Lifetime EP0816245B1 (en)

Applications Claiming Priority (2)

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FR9608279A FR2750676B1 (en) 1996-07-03 1996-07-03 DISPENSING HEAD OF A LIQUID CONSISTING PRODUCT WITH A VISCOUS COMPRISING AN ELASTIC CLOSING MEMBER AND DISPENSING ASSEMBLY THUS EQUIPPED
FR9608279 1996-07-03

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DE (1) DE69700769T2 (en)
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FR2750676A1 (en) 1998-01-09
ES2140951T3 (en) 2000-03-01
DE69700769T2 (en) 2000-02-17
DE69700769D1 (en) 1999-12-16
US5924605A (en) 1999-07-20
FR2750676B1 (en) 1998-10-16
EP0816245B1 (en) 1999-11-10

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