EP0592637B1 - Product dispenser with deformable bag - Google Patents

Product dispenser with deformable bag Download PDF

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Publication number
EP0592637B1
EP0592637B1 EP93909029A EP93909029A EP0592637B1 EP 0592637 B1 EP0592637 B1 EP 0592637B1 EP 93909029 A EP93909029 A EP 93909029A EP 93909029 A EP93909029 A EP 93909029A EP 0592637 B1 EP0592637 B1 EP 0592637B1
Authority
EP
European Patent Office
Prior art keywords
bag
base
container
product dispenser
dispenser according
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.)
Expired - Lifetime
Application number
EP93909029A
Other languages
German (de)
French (fr)
Other versions
EP0592637A1 (en
Inventor
Jean-Louis Gueret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
Original Assignee
LOreal SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP0592637A1 publication Critical patent/EP0592637A1/en
Application granted granted Critical
Publication of EP0592637B1 publication Critical patent/EP0592637B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0027—Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
    • B05B11/0029—Valves not actuated by pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00446—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being located at the bottom of the container or of an enclosure surrounding the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0072—A valve member forming part of an outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0097—Means for filling or refilling the sprayer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/026—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • B05B11/1032—Pumps having a pumping chamber with a deformable wall actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1071—Two inlet valves being placed in a supply conduit one upstream of the other
    • 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
    • B65D2231/00—Means for facilitating the complete expelling of the contents
    • B65D2231/001—Means for facilitating the complete expelling of the contents the container being a bag
    • B65D2231/002—Means for facilitating the complete expelling of the contents the container being a bag comprising strips forming channels or liquid passageways
    • 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
    • B65D2583/00—Containers or packages with special means for dispensing contents
    • B65D2583/005—Dispensers provided with a replaceable cartridge, recharge or pouch located within the dispenser

Definitions

  • the present invention relates to a product dispenser, liquid to pasty, with a deformable pocket. More specifically, it relates to a dispenser comprising a container inside which is disposed a pocket of easily deformable plastic complex, without air intake.
  • a base carrying a dispensing member is generally held mechanically relative to the container.
  • the material of the bag must be very flexible and very thin to have a very small shape memory so as to allow the bag to be completely emptied, even when the dispensing member comprises a manual pump which, as is known , works all the better when the vacuum in the pocket is low, the pocket being without air intake when, in particular, the products contained in the pocket are sensitive to air; this is the case, for example, of cosmetic products.
  • FR-A-2 648 794 shows such a dispenser of the kind in which the bag is formed from a sheath obtained by welding, along at least one longitudinal strip, the longitudinal edges of a strap, the peripheral length of the section straight of the sheath being substantially equal to the peripheral length of the base, said longitudinal weld strip cutting a weld strip from the bottom end in a region separate from the ends of said weld strip from the bottom end.
  • the pocket is fixed to the base by crimping which risks damaging the relatively fragile plastic complex, in particular when its thickness is small so that it is easily deformable.
  • the tightness at this fixing by crimping also requires improvement.
  • US-A-3,662,926 shows a dispenser with a deformable pocket made from a flexible tube devoid of longitudinal weld strip.
  • the pocket is fixed by welding to the base. Welding does not pose any major problem, in this case, since the pocket is not made of a plastic complex and does not include a longitudinal weld strip, constituting an additional thickness.
  • the invention aims to make a dispenser in which the product is particularly sheltered from air, this dispenser in front allow you to empty almost the entire pocket.
  • the material of the pocket must therefore be particularly airtight, which can be obtained by using a complex material, with several layers.
  • the attachment of the pocket to the base must also be airtight. It is further desirable that the manufacturing remains simple and reliable.
  • the weld surface has at all points a radius of curvature greater than 0.5 mm.
  • the strap from which said pocket is formed can have a thickness of between 20 and 200 microns.
  • the pocket is made of a complex material consisting of at least three layers, including an internal layer directly welded to the welding surface of the base and an external layer intended for the mechanical protection of the pocket.
  • the inner layer and / or the outer layer is made of a material from the group formed by polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, polyacrylonitrile, polyamide, polyester.
  • the intermediate layer arranged between the outer layer and the inner layer, is made of a material from the group formed by poly (ethylene / vinyl acetate) chloride, poly (ethylene / vinyl alcohol), polyacrylonitrile, aluminum, polyamide.
  • the material of the inner layer has a lower melting point than that of the material of the outer layer.
  • the external layer is made of a material from the group formed by polyester, polyethylene terephthalate, ceramic polyester, metallized polyester, in particular aluminized polyester.
  • this outer layer has a film, serving as an adhesive, made of a material of the polyurethane, polyethylene polyvinylidene chloride group.
  • the melting point of the outer layer is substantially between 220 ° C and 280 ° C.
  • the internal layer is made of a material from the group formed by polyethylene, polyethylene containing zeolites loaded with sanitizers and / or preservatives.
  • the melting point of the inner layer is substantially between 180 ° C and 200 ° C.
  • the set of two welded longitudinal edges folded against the outer surface of the sheath can be welded in this position by the weld strip from the bottom end of the pocket.
  • the longitudinal weld strip of the pocket is located in the region of the welding surface of the base where the radius of curvature is maximum.
  • the weld strip at the bottom end may be straight, or in a broken or curvilinear line.
  • the base includes stop means cooperating with the upper edge of the container.
  • the container can be made of a rigid material and has an air intake orifice.
  • the container is made of a flexible memory material and is associated with a valve arranged in a direction such that the air present in the container is compressed when an action is exerted on the container with a view to dispensing the product contained in the pocket.
  • the container may be made of transparent material and associated with a screen arranged inside the container, outside the pocket, said screen masking said pocket.
  • the container can be welded to the base, in line with a welding surface, arranged above the welding surface of the pocket on the base.
  • the container can receive, at its end opposite to that which receives the base, a bottom secured to the container by welding or gluing.
  • the dispensing member can be a diaphragm pump, a needle valve or a manual pump.
  • the base and the container can carry indexing means making it possible to position the base relative to the container.
  • the base includes an anti-prisoner device; the anti-prisoner device is passable by a filling cannula.
  • a dispenser 1 of liquid to pasty product which comprises a flexible pocket 2, deformable.
  • the pocket 2 is made integral, in the upper part, by means of a base 7, of a rigid outer container 4, of cylindrical shape, the cross section of which can have a shape different from the circular shape, for example a Oval shape.
  • the container 4 is provided with a bottom 5 comprising an orifice 6, to establish communication with the atmosphere.
  • a manual pump 8, without air intake, surmounted by a push button 9, is fixed to the base 7 which has the shape of a bowl.
  • the bowl 7 is provided, on its outer wall, with the welding surface 10 on which is engaged the upper part of the pocket 2, which is fixed to the wall of the base by welding along the range of welding 10.
  • the base 7 turns its concavity on the side opposite to the pocket 2.
  • a sleeve 12 is formed in the central zone of the bottom 11 of the base, as well as a sleeve 14; the sheath 12 and the sleeve 14, projecting from the side of the bottom 11 facing the pump 8, define between them an annular space in which takes place an annular tail 15 carried by the pump 8 which, moreover, has a flange 17 d 'support on the upper edge of the sleeve 12; in this position, the pump is secured to the base 7 by gluing; in a variant not shown, this joining is obtained by breakdown.
  • a rod 20 projects upwards relative to the pump body 8.
  • the push-button internally has a bore suitable for receiving the end of the rod 20 and a conduit for establishing communication with the atmosphere through a nozzle. dispenser 21.
  • the rod 20 can be pressed into the pump body and actuate a piston when pressure is exerted on the push-button 9, the return being ensured by a spring disposed inside the pump body.
  • the base 7 Towards its upper end, the base 7 is provided with a collar 16 suitable for cooperating with a flange 22 provided at the upper part of the container 4.
  • the bottom 11 of the bowl 7 carries anti-prisoner members 27 whose fission, known in itself, is to prevent the walls of the flexible bag 2 from sticking against each other, for example in their middle zone, and to trap, in the lower part, a volume of product which cannot be ejected.
  • the anti-prisoner members are advantageously constituted by fins 28 placed around the axis of the container and extend longitudinally downwards from the opening in which the base of the pump body 8 is engaged; the edge of each fin adjacent to the axis has a recess 29 leaving a passage for the product; the fins 28 advantageously come from molding with the bowl 7; of course, it is possible to provide any anti-prisoner device molded with the bottom 11 of the bowl, for example a grid or an openwork tube.
  • the lower part 30 of the anti-prisoner members 27 is free, so as to allow the passage of a filling cannula of the bag 2 before the installation of the pump 8, when the bag 2 is filled by the high, after it has been fully completed; of course it is preferable that, in this case, the pump 8 be secured to the base 7 by breakdown.
  • the container 4 is made of transparent material; a screen 31, made of a tube cut from a sheath obtained by extrusion, is placed in the container 4 and surrounds the pocket 2, by masking it; the screen 31 carries any desired marking and / or decoration.
  • the screen 31 can be opaque or translucent; its wall can, advantageously, to obtain decorative effects, be wavy, or have ribs, for example, longitudinal.
  • the material of the screen 31 can be arbitrary, since the screen is not in contact with the product: it is advantageously chosen to be biodegradable.
  • the bag 2, shown in Figures 1, 3 and 4 is made of a complex material consisting of three layers; the inner layer i and the outer layer e are made of a material chosen from the group formed by polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, polyacrylonitrile, polyamide, and polyester.
  • the intermediate layer m is made of a material chosen from the group formed by poly (ethylene / vinyl acetate) chloride, poly (ethylene / vinyl alcohol), polyacrylonitrile, aluminum, and a polyamide.
  • complex material has great flexibility, to allow easy operation of the pump, and a very small shape memory to facilitate the complete emptying of the bag; this also presupposes that the complex material has a small thickness: this does not exceed, moreover, 2 / 10ths of a mm, while being greater than 20 microns. Better results are obtained when this thickness does not exceed 100 microns.
  • the use of a complex material to constitute the bag is dictated by the need for air tightness, on the one hand, and compatibility with the products that the bag must contain, on the other hand, such as, for example, although not limiting, cosmetic products.
  • a successful complex consisted of four successive layers, respectively of polyethylene terephthalate, polyurethane, aluminum, and polyethylene.
  • the outer layer e is made of a material from the group formed by polyester, polyethylene terephthalate, ceramic polyester, metallized polyester, in particular aluminized.
  • the treated polyesters atomization of silica for ceramic polyester, or vacuum metallization for metallized polyester
  • this outer layer e has a film, serving as an adhesive, made of a material of the polyurethane, polyethylene, polyvinylidene chloride group.
  • the melting point of the outer layer is substantially between 220 ° C and 280 ° C.
  • the inner layer i is preferably made of polyethylene, or of polyethylene containing zeolites loaded with sanitizers and / or preservatives.
  • the melting point of the inner layer is approximately between 180 ° and 200 ° C.
  • the pocket 2 is obtained from a strap which has been welded the two longitudinal edges.
  • the pocket 2 is formed from a strap of which first welded the inner faces of two longitudinal edges which are located on the same side of the strap to obtain a longitudinal weld strip 32, and constitute a sheath which is cut to length; in a second step, the welded strip is folded over the external surface of the pocket, and held, at its ends, in this position, by welding the upper end of the pocket 2 to the welding surface 10 of the base 7.
  • This welding operation of the upper end of the pocket begins with the welding of the folded strip 32.
  • a heating welding tool in particular a knurling wheel, presses this folded strip 32 against the external surface of the pocket and against the welding surface 10.
  • the external layer e whose melting point is higher, can be heated to a sufficient temperature to melt the internal layer i and cause the welding of the surface 10, without this external layer e being crossed by the tool or passing through the internal layer.
  • the welding surface 10, and more generally the base 7, are made of a material which can be welded to the internal layer i ; for example the base 7 is made of polypropylene which can be welded with a polyethylene film.
  • the folded strip 32 is welded at the same time as the sheath according to the transverse weld strip 33 which closes the pocket 2 at its lower part.
  • the folded strip 32 and the strip 33 intersect in a portion of the strip 33 remote from its ends 33a and 33b.
  • the straight section of the pocket is entirely contained in the straight section of the container 4, which allows and facilitates the positioning of the pocket in the container when the pocket is already full. This is one of the advantages of the pocket according to the invention.
  • Said pocket can, moreover, also be filled from below; the composition and the low thickness of the complex allow, in fact, to weld the lower end of the pocket by pinching the product, present in the sheath, during welding, which ensures that there will be no air in the closed pocket. It is therefore possible to use a vacuum filling machine for the bag from the bottom.
  • the welding strip 32 is located on the welding surface in an area where the radius of curvature is maximum; means for indexing the base relative to the container are provided if this indexing is not obtained automatically by the shape of their cross section.
  • FIG. 5 shows a variant of a dispenser according to the invention, the container 104 of which consists of a sheath 134 made of flexible material, with shape memory, obtained by extrusion, and closed at its lower part by a bottom 105 made of rigid plastic material ; the bottom 105, attached to the sheath in the example shown and secured to it, for example by bonding or welding the end 135, may have a section different from that of the base 107 to which the end is secured sheath 134 upper container 104.
  • This joining is obtained by welding the sheath 134 on a welding surface 136 of the base 107 located, on said base, above the welding range 110 of the flexible bag 102 on the base 107.
  • the material of the sheath 134 may be any; as has been said about the screen 31 of Figures 1 and 3, it is advantageously chosen biodegradable.
  • the base 107 has a sleeve 138, extending away from the pocket 102, on which is mounted, by clipping at 143, a dispensing head 139 whose dispensing orifice 142 is closed, at rest, by a needle 141 carried by an elastic membrane 140; a channel 144, in communication with the interior of the pocket 102, allows a distribution of the product by the dispensing orifice 142 when the latter is released by the needle 141 by action of the pressure of the product on the membrane 140; pressurization of the product is obtained by manual action on the flexible container 134 and is allowed thanks to the presence of a bottom valve 137 cooperating with the orifice 106 for communication with the outside of the volume between the pocket 102 and inside container 134.
  • the bottom 105 is replaced by a transverse weld of the bottom end of the container 104.
  • Figure 6 shows a pocket 202 welded to a rigid base 207; the base 207 is provided with a neck 215 associated with a partially elastic element 250 to constitute a one-way opening valve; the element 250 comprises a hooking part 206 on a finger 214 integral with the base 207 and an elastic part 208 in the form of a frustoconical membrane bearing elastically against the bottom of the base; openings 217 allow the product to exit the bag while the membrane 208 prevents it, unless pressure is exerted on the walls of the bag; a cover 245 has, on the one hand, hooking means 246 on a circular rim 247 of the base 207 and, on the other hand, axial tongues 248 extending to the periphery of the membrane 208, so that, when the cover 245 is in place on the base 207, an action is exerted on the periphery of the membrane applied to its seat formed by the bottom of the base, thus preventing any product outlet, even if an action is exerted on the pocket
  • Figure 7 shows a dispenser implementing the refill of Figure 6; after the cover 245 has been removed from the base 245, the refill is introduced into a container 204; a diaphragm pump 239, as known per se, is placed on the base 207 on which it is maintained by means of attachment means 249 carried by the neck 215 of the base, the pump itself carrying additional hanging means. It will be noted that, thanks to this arrangement, the product contained in the refill is never brought back into contact with air until its use proper.
  • the diaphragm pump can also include a non-return valve 251 similar to the valve 250 carried by the base: this is the variant shown in FIG. 8.
  • FIG. 9 shows another variant of a dispenser, the elements of which similar to the elements described above are designated by the same numbers of units and tens, preceded by a digit 3 of hundreds. Their description will not be repeated or will be made only succinctly.
  • a container 304 There is a container 304, a flexible pocket 302 welded to a base 307 provided with an anti-prisoner member 327.
  • a pump 339 with membrane M is mounted on the base. The pump body 339 can rotate, around the axis of the container 304, between a closed position and an open position.
  • the pump body 339 comprises a cylindrical sleeve 360 of revolution coaxial with the container 304.
  • This sleeve 360 is snapped, with the possibility of rotation about its axis, in a neck 315 cylindrical of revolution of the base 307.
  • a hollow core 361 secured to the base 307 is engaged in the sleeve 360, in contact with its inner wall.
  • the internal volume of the core 361 communicates with the pocket 302.
  • the internal wall of the sleeve 360 has longitudinal grooves 362, regularly spaced, extending above the core 361 to open into a space 363 closed by a valve 350.
  • the cylindrical wall of the core 361 has longitudinal windows 364, having the same angular spacing as the grooves 362.
  • the length of the windows 364 is sufficient for them to be able to communicate with the grooves 362 when they occupy the same angular position. This corresponds to the open position of FIG. 10.
  • the entire pocket and the base can be recycled for the manufacture of new bases. Indeed, the mass of the pocket is very small compared to that of the base and the amount of non-compatible material of the pocket is negligible. Manufacturing waste can therefore be reused.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Packages (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Abstract

The product dispenser (1) is comprised of a container (4) inside which is arranged a bag (2) made of a deformable plastic complex; a base (7) carrying the dispensing member (8) is mechanically held to the container (4), one extremity of the bottom of said bag (2) being welded along a band (33). The pouch or bag (2) is formed from a sheath obtained by welding the longitudinal edges of a strip along at least one longitudinal band (32). The longidutinal welding band (32) welds an internal face of a longitudinal edge of the strip forming said bag (2) to the internal face of the other longitudinal edge of this strip situated on the same side of the strip as the former. The base (7) is comprised of a weld bearing face (10) and the assembly welded by the two longitudinal edges of the strip is back folded against the external surface of the sheath and welded in that position by welding the extremity of the bag (2) to the weld bearing face (10) of the base.

Description

La présente invention a pour objet un distributeur de produit, liquide à pâteux, à poche déformable. Plus précisément, elle concerne un distributeur comprenant un conteneur à l'intérieur duquel est disposée une poche en complexe plastique déformable facilement, sans reprise d'air. Une embase portant un organe de distribution est, généralement, maintenue mécaniquement par rapport au conteneur. Le matériau constitutif de la poche doit être très flexible et de très faible épaisseur pour présenter une très faible mémoire de forme de façon à permettre de vider totalement la poche, même lorsque l'organe de distribution comprend une pompe manuelle qui, comme on le sait, fonctionne d'autant mieux que la dépression dans la poche est faible, la poche étant sans reprise d'air lorsque, notamment, les produits contenus dans la poche sont sensibles à l'air ; c'est le cas, par exemple, de produits cosmétiques.The present invention relates to a product dispenser, liquid to pasty, with a deformable pocket. More specifically, it relates to a dispenser comprising a container inside which is disposed a pocket of easily deformable plastic complex, without air intake. A base carrying a dispensing member is generally held mechanically relative to the container. The material of the bag must be very flexible and very thin to have a very small shape memory so as to allow the bag to be completely emptied, even when the dispensing member comprises a manual pump which, as is known , works all the better when the vacuum in the pocket is low, the pocket being without air intake when, in particular, the products contained in the pocket are sensitive to air; this is the case, for example, of cosmetic products.

FR-A-2 648 794 montre un tel distributeur du genre dans lequel la poche est formée à partir d'une gaine obtenue par soudure, selon au moins une bande longitudinale, des bords longitudinaux d'une lanière, la longueur périphérique de la section droite de la gaine étant sensiblement égale à la longueur périphérique de l'embase, ladite bande de soudure longitudinale coupant une bande de soudure de l'extrémité de fond dans une zone distincte des extrémités de ladite bande de soudure de l'extrémité de fond. La fixation de la poche à l'embase est réalisée par un sertissage qui risque de détériorer le complexe plastique relativement fragile, en particulier lorsque son épaisseur est faible pour qu'il soit facilement déformable. L'étanchéité au niveau de cette fixation par sertissage demande, en outre, à être améliorée.FR-A-2 648 794 shows such a dispenser of the kind in which the bag is formed from a sheath obtained by welding, along at least one longitudinal strip, the longitudinal edges of a strap, the peripheral length of the section straight of the sheath being substantially equal to the peripheral length of the base, said longitudinal weld strip cutting a weld strip from the bottom end in a region separate from the ends of said weld strip from the bottom end. The pocket is fixed to the base by crimping which risks damaging the relatively fragile plastic complex, in particular when its thickness is small so that it is easily deformable. The tightness at this fixing by crimping also requires improvement.

US-A-3 662 926 montre un distributeur à poche déformable réalisée à partir d'un tube souple dépourvu de bande de soudure longitudinale. La fixation de la poche est assurée par soudage sur l'embase. Le soudage ne pose pas de problème majeur, dans ce cas, puisque la poche n'est pas réalisée en un complexe plastique et ne comporte pas de bande de soudure longitudinale, constituant une surépaisseur.US-A-3,662,926 shows a dispenser with a deformable pocket made from a flexible tube devoid of longitudinal weld strip. The pocket is fixed by welding to the base. Welding does not pose any major problem, in this case, since the pocket is not made of a plastic complex and does not include a longitudinal weld strip, constituting an additional thickness.

L'invention vise à réaliser un distributeur dans lequel le produit soit particulièrement à l'abri de l'air, ce distributeur devant permettre de vider pratiquement toute la poche. Le matériau de la poche doit donc être particulièrement étanche à l'air, ce qui peut être obtenu par la mise en oeuvre d'un matériau complexe, à plusieurs couches. La solidarisation de la poche à l'embase doit également être bien étanche à l'air. Il est souhaitable, en outre, que la fabrication reste simple et fiable.The invention aims to make a dispenser in which the product is particularly sheltered from air, this dispenser in front allow you to empty almost the entire pocket. The material of the pocket must therefore be particularly airtight, which can be obtained by using a complex material, with several layers. The attachment of the pocket to the base must also be airtight. It is further desirable that the manufacturing remains simple and reliable.

La présente invention a donc pour objet un distributeur de produit , liquide à pâteux, comprenant un conteneur à l'intérieur duquel est disposée une poche en complexe plastique déformable facilement, sans reprise d'air, une embase portant l'organe de distribution étant mécaniquement maintenue par rapport au conteneur , une extrémité de fond de ladite poche étant soudée selon une bande, distributeur dans lequel ladite poche est formée à partir d'une gaine obtenue par soudure, selon au moins une bande longitudinale, des bords longitudinaux d'une lanière, la longueur périphérique de la section droite de la gaine étant égale à la longueur périphérique de l'embase, ladite bande de soudure longitudinale coupant ladite bande de soudure de l'extrémité de fond dans une zone distincte des extrémités de ladite bande de soudure de l'extrémité de fond, caractérisé par le fait que :

  • la bande de soudure longitudinale soude une face intérieure d'un bord longitudinal de la lanière à la face intérieure de l'autre bord longitudinal de la lanière, les faces soudées étant situées du même côté de la lanière,
  • l'embase comporte une portée de soudure, et
  • l'ensemble soudé des deux bords longitudinaux de la lanière est rabattu contre la surface extérieure de la gaine et soudé dans cette position par la soudure de l'extrémité de la poche sur la portée de soudure de l'embase.
The present invention therefore relates to a product dispenser, liquid to pasty, comprising a container inside which is disposed a pocket of easily deformable plastic complex, without air intake, a base carrying the dispensing member being mechanically held relative to the container, a bottom end of said pocket being welded along a strip, dispenser in which said pocket is formed from a sheath obtained by welding, along at least one longitudinal strip, the longitudinal edges of a strap , the peripheral length of the straight section of the sheath being equal to the peripheral length of the base, said longitudinal weld strip cutting said weld strip from the bottom end in a zone distinct from the ends of said weld strip the bottom end, characterized in that:
  • the longitudinal weld strip welds an inner face of a longitudinal edge of the strap to the inner face of the other longitudinal edge of the strap, the welded faces being located on the same side of the strap,
  • the base includes a welding surface, and
  • the welded assembly of the two longitudinal edges of the strap is folded against the outer surface of the sheath and welded in this position by welding the end of the pocket to the welding surface of the base.

De préférence, la portée de soudure a en tous points un rayon de courbure supérieur à 0,5 mm.Preferably, the weld surface has at all points a radius of curvature greater than 0.5 mm.

La lanière à partir de laquelle est formée ladite poche peut avoir une épaisseur comprise entre 20 et 200 microns.The strap from which said pocket is formed can have a thickness of between 20 and 200 microns.

Avantageusement, la poche est réalisée en un matériau complexe constitué d'au moins trois couches, dont une couche interne directement soudée sur la portée de soudure de l'embase et une couche externe destinée à la protection mécanique de la poche.Advantageously, the pocket is made of a complex material consisting of at least three layers, including an internal layer directly welded to the welding surface of the base and an external layer intended for the mechanical protection of the pocket.

La couche interne et/ou la couche externe est en un matériau du groupe formé par polyéthylène, polyéthylène téréphtalate, polychlorure de vinyle, polypropylène, polyacrylonitrile, polyamide, polyester.The inner layer and / or the outer layer is made of a material from the group formed by polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, polyacrylonitrile, polyamide, polyester.

La couche intermédiaire, disposée entre la couche externe et la couche interne, est en un matériau du groupe formé par chlorure de poly(éthylène/acétate de vinyle), poly(éthylène/alcool vinylique), polyacrylonitrile, aluminium, polyamide.The intermediate layer, arranged between the outer layer and the inner layer, is made of a material from the group formed by poly (ethylene / vinyl acetate) chloride, poly (ethylene / vinyl alcohol), polyacrylonitrile, aluminum, polyamide.

De préférence, le matériau de la couche interne a un point de fusion inférieur à celui du matériau de la couche externe.Preferably, the material of the inner layer has a lower melting point than that of the material of the outer layer.

Avantageusement, la couche externe est en un matériau du groupe formé par polyester, polyéthylène téréphtalate, polyester céramique, polyester métallisé, en particulier aluminisé. Du côté intérieur, cette couche externe comporte une pellicule, servant de colle, en un matériau du groupe polyuréthane, polyéthylène polychlorure de vinylidène. Le point de fusion de la couche externe se situe sensiblement entre 220°C et 280°C.Advantageously, the external layer is made of a material from the group formed by polyester, polyethylene terephthalate, ceramic polyester, metallized polyester, in particular aluminized polyester. On the inside, this outer layer has a film, serving as an adhesive, made of a material of the polyurethane, polyethylene polyvinylidene chloride group. The melting point of the outer layer is substantially between 220 ° C and 280 ° C.

De préférence, la couche interne est en un matériau du groupe formé par polyéthylène, polyéthylène contenant des zéolites chargés de produits aseptisants et/ou d'agents conservateurs. Le point de fusion de la couche interne se situe sensiblement entre 180°C et 200°C.Preferably, the internal layer is made of a material from the group formed by polyethylene, polyethylene containing zeolites loaded with sanitizers and / or preservatives. The melting point of the inner layer is substantially between 180 ° C and 200 ° C.

L'ensemble des deux bords longitudinaux soudés rabattu contre la surface extérieure de la gaine, peut être soudé dans cette position par la bande de soudure de l'extrémité de fond de la poche.The set of two welded longitudinal edges folded against the outer surface of the sheath can be welded in this position by the weld strip from the bottom end of the pocket.

Avantageusement, la bande de soudure longitudinale de la poche est située dans la zone de la portée de soudure de l'embase où le rayon de courbure est maximum.Advantageously, the longitudinal weld strip of the pocket is located in the region of the welding surface of the base where the radius of curvature is maximum.

La bande de soudure de l'extrémité de fond peut être rectiligne, ou en ligne brisée ou curviligne.The weld strip at the bottom end may be straight, or in a broken or curvilinear line.

De préférence, l'embase comporte des moyens de butée coopérant avec le rebord supérieur du conteneur.Preferably, the base includes stop means cooperating with the upper edge of the container.

Le conteneur peut être réalisé en un matériau rigide et comporte un orifice de reprise d'air.The container can be made of a rigid material and has an air intake orifice.

Selon une autre possibilité, le conteneur est en un matériau souple à mémoire et est associé à une soupape disposée dans un sens tel que l'air présent dans le conteneur est comprimé lorsqu'une action est exercée sur le conteneur en vue de la distribution du produit contenu dans la poche.According to another possibility, the container is made of a flexible memory material and is associated with a valve arranged in a direction such that the air present in the container is compressed when an action is exerted on the container with a view to dispensing the product contained in the pocket.

Le conteneur peut être en matériau transparent et associé à un écran disposé à l'intérieur du conteneur, extérieurement à la poche, ledit écran masquant ladite poche.The container may be made of transparent material and associated with a screen arranged inside the container, outside the pocket, said screen masking said pocket.

Le conteneur peut être soudé sur l'embase, au droit d'une portée de soudure, disposée au-dessus de la portée de soudure de la poche sur l'embase.The container can be welded to the base, in line with a welding surface, arranged above the welding surface of the pocket on the base.

Le conteneur peut recevoir, à son extrémité opposée à celle qui reçoit l'embase, un fond solidarisé au conteneur par soudage ou collage.The container can receive, at its end opposite to that which receives the base, a bottom secured to the container by welding or gluing.

L'organe de distribution peut être une pompe à membrane, un pointeau ou une pompe manuelle.The dispensing member can be a diaphragm pump, a needle valve or a manual pump.

L'embase et le conteneur peuvent porter des moyens d'indexation permettant de positionner l'embase par rapport au conteneur.The base and the container can carry indexing means making it possible to position the base relative to the container.

Avantageusement, l'embase comporte un dispositif anti-prisonnier ; le dispositif anti-prisonnier est traversable par une canule de remplissage.Advantageously, the base includes an anti-prisoner device; the anti-prisoner device is passable by a filling cannula.

Pour mieux faire comprendre l'objet de l'invention, on va en décrire maintenant, à titre d'exemple purement illustratif et non limitatif, des modes de réalisation sur les dessins annexés.To better understand the object of the invention, we will now describe, by way of purely illustrative and nonlimiting example, embodiments in the accompanying drawings.

Sur ces dessins :

  • la figure 1 est une vue éclatée d'un distributeur selon l'invention, montrant ses diverses pièces constitutives ;
  • la figure 2 représente un sous-ensemble du distributeur selon la figure 1, montrant la poche et l'embase assemblées ;
  • la figure 3 est une coupe du distributeur, assemblé, de la figure 1 ;
  • la figure 4 est une coupe transversale schématique simplifiée de la poche et de l'embase suivant la ligne IV-IV de la figure 2, avec une loupe sur la bande de soudure ;
  • la figure 5 est une variante de distributeur selon l'invention, en coupe.
  • la figure 6 est une recharge, pour distributeur selon l'invention, partiellement en coupe ;
  • la figure 7 est une coupe axiale partielle d'une variante de distributeur utilisant la recharge selon la figure 6.
  • la figure 8 est une variante de distributeur selon la figure 7.
  • la figure 9 est une coupe axiale d'une variante de distributeur dont la tête comporte un organe permettant d'assurer une ouverture/fermeture ;
  • la figure 10 est une coupe suivant la ligne X-X, de la figure 9, alors que la tête est en position d'ouverture ;
  • la figure 11, enfin, est une section partielle semblable à la figure 10, alors que la tête est en position de fermeture.
In these drawings:
  • Figure 1 is an exploded view of a dispenser according to the invention, showing its various constituent parts;
  • FIG. 2 represents a sub-assembly of the dispenser according to FIG. 1, showing the bag and the assembled base;
  • Figure 3 is a sectional view of the assembled dispenser of Figure 1;
  • Figure 4 is a simplified schematic cross section of the pocket and the base along the line IV-IV of Figure 2, with a magnifying glass on the weld strip;
  • Figure 5 is a variant of distributor according to the invention, in section.
  • Figure 6 is a refill, for dispenser according to the invention, partially in section;
  • FIG. 7 is a partial axial section of a variant of a dispenser using the refill according to FIG. 6.
  • FIG. 8 is a variant of a distributor according to FIG. 7.
  • FIG. 9 is an axial section of a variant of a dispenser, the head of which comprises a member making it possible to ensure opening / closing;
  • Figure 10 is a section along line XX, of Figure 9, while the head is in the open position;
  • Figure 11, finally, is a partial section similar to Figure 10, while the head is in the closed position.

En se reportant aux figures 1 et 3 des dessins, on peut voir un distributeur 1 de produit liquide à pâteux, qui comprend une poche souple 2, déformable. La poche 2 est rendue solidaire, en partie haute, par l'intermédiaire d'une embase 7, d'un conteneur extérieur rigide 4, de forme cylindrique, dont la section transversale peut avoir une forme différente de la forme circulaire, par exemple une forme ovale. Le conteneur 4 est muni d'un fond 5 comportant un orifice 6, pour établir une communication avec l'atmosphère. Une pompe manuelle 8, sans reprise d'air, surmontée d'un bouton-poussoir 9, est fixée sur l'embase 7 qui a la forme d'une cuvette. Plus précisément, la cuvette 7 est munie, sur sa paroi extérieure, de la portée de soudure 10 sur laquelle est engagée la partie supérieure de la poche 2, qui est fixée à la paroi de l'embase par soudage le long de la portée de soudure 10. L'embase 7 tourne sa concavité du côté opposé à la poche 2.Referring to Figures 1 and 3 of the drawings, one can see a dispenser 1 of liquid to pasty product, which comprises a flexible pocket 2, deformable. The pocket 2 is made integral, in the upper part, by means of a base 7, of a rigid outer container 4, of cylindrical shape, the cross section of which can have a shape different from the circular shape, for example a Oval shape. The container 4 is provided with a bottom 5 comprising an orifice 6, to establish communication with the atmosphere. A manual pump 8, without air intake, surmounted by a push button 9, is fixed to the base 7 which has the shape of a bowl. More specifically, the bowl 7 is provided, on its outer wall, with the welding surface 10 on which is engaged the upper part of the pocket 2, which is fixed to the wall of the base by welding along the range of welding 10. The base 7 turns its concavity on the side opposite to the pocket 2.

Un fourreau 12 est ménagé dans la zone centrale du fond 11 de l'embase, ainsi qu'un manchon 14 ; le fourreau 12 et le manchon 14, faisant saillie du côté du fond 11 tourné vers la pompe 8, définissent entre eux un espace annulaire dans lequel prend place une queue annulaire 15 que porte la pompe 8 qui, par ailleurs, présente une collerette 17 d'appui sur le bord supérieur du fourreau 12 ; dans cette position, la pompe est solidarisée à l'embase 7 par collage ; dans une variante non représentée, cette solidarisation est obtenue par claquage.A sleeve 12 is formed in the central zone of the bottom 11 of the base, as well as a sleeve 14; the sheath 12 and the sleeve 14, projecting from the side of the bottom 11 facing the pump 8, define between them an annular space in which takes place an annular tail 15 carried by the pump 8 which, moreover, has a flange 17 d 'support on the upper edge of the sleeve 12; in this position, the pump is secured to the base 7 by gluing; in a variant not shown, this joining is obtained by breakdown.

Une tige 20 fait saillie, vers le haut, relativement au corps de pompe 8. Le bouton-poussoir comporte intérieurement un alésage propre à recevoir l'extrémité de la tige 20 et un conduit pour établir une communication avec l'atmosphère à travers une buse de distribution 21. La tige 20 peut être enfoncée dans le corps de pompe et actionner un piston lorsqu'une pression est exercée sur le bouton-poussoir 9, le retour étant assuré par un ressort disposé à l'intérieur du corps de pompe.A rod 20 projects upwards relative to the pump body 8. The push-button internally has a bore suitable for receiving the end of the rod 20 and a conduit for establishing communication with the atmosphere through a nozzle. dispenser 21. The rod 20 can be pressed into the pump body and actuate a piston when pressure is exerted on the push-button 9, the return being ensured by a spring disposed inside the pump body.

Vers son extrémité supérieure, l'embase 7 est munie d'une collerette 16 propre à coopérer avec un rebord 22 prévu à la partie supérieure du conteneur 4. Une bague de retenue 18, munie dans sa région centrale d'une ouverture pour le passage du corps de pompe 8, recouvre la collerette 16 de l'embase 7 et est solidarisé au conteneur par collage de sa face transversale d'extrémité 23 ; cette solidarisation par collage peut, bien entendu, être remplacée par tout autre type de solidarisation, par exemple par clipsage.Towards its upper end, the base 7 is provided with a collar 16 suitable for cooperating with a flange 22 provided at the upper part of the container 4. A retaining ring 18, provided in its central region with an opening for passage of the pump body 8, covers the collar 16 of the base 7 and is secured to the container by bonding of its transverse end face 23; this joining by gluing can, of course, be replaced by any other type of joining, for example by clipping.

Le fond 11 de la cuvette 7 porte des organes anti-prisonniers 27 dont la fouction, connue en elle-même, est d'empêcher les parois de la poche souple 2 de se coller l'une contre l'autre, par exemple dans leur zone médiane, et d'emprisonner, dans la partie inférieure, un volume de produit qui ne pourra pas être éjecté. Les organes anti-prisonniers sont avantageusement constitués par des ailettes 28 placées autour de l'axe du conteneur et s'étendent longitudinalement vers le bas à partir de l'ouverture dans laquelle est engagée la base du corps de pompe 8 ; la bordure de chaque ailette voisine de l'axe comporte un évidement 29 laissant un passage pour le produit ; les ailettes 28 viennent avantageusement de moulage avec la cuvette 7 ; bien entendu, il est possible de prévoir n'importe quel dispositif anti-prisonnier venu de moulage avec le fond 11 de la cuvette, par exemple une grille ou un tube ajouré. De préférence, la partie inférieure 30 des organes anti-prisonniers 27 est libre, de façon à permettre le passage d'une canule de remplissage de la poche 2 avant la mise en place de la pompe 8, lorsque la poche 2 est remplie par le haut, après qu'elle ait été entièrement réalisée ; bien entendu, il est préférable que, dans ce cas, la pompe 8 soit solidarisée à l'embase 7 par claquage.The bottom 11 of the bowl 7 carries anti-prisoner members 27 whose fission, known in itself, is to prevent the walls of the flexible bag 2 from sticking against each other, for example in their middle zone, and to trap, in the lower part, a volume of product which cannot be ejected. The anti-prisoner members are advantageously constituted by fins 28 placed around the axis of the container and extend longitudinally downwards from the opening in which the base of the pump body 8 is engaged; the edge of each fin adjacent to the axis has a recess 29 leaving a passage for the product; the fins 28 advantageously come from molding with the bowl 7; of course, it is possible to provide any anti-prisoner device molded with the bottom 11 of the bowl, for example a grid or an openwork tube. Preferably, the lower part 30 of the anti-prisoner members 27 is free, so as to allow the passage of a filling cannula of the bag 2 before the installation of the pump 8, when the bag 2 is filled by the high, after it has been fully completed; of course it is preferable that, in this case, the pump 8 be secured to the base 7 by breakdown.

Dans l'exemple représenté aux figures 1 et 3, le conteneur 4 est en matière transparente ; un écran 31, réalisé en un tube découpé dans une gaine obtenue par extrusion, est disposé dans le conteneur 4 et entoure la poche 2, en la masquant ; l'écran 31 porte tout marquage et/ou toute décoration désirés. L'écran 31 peut être opaque ou translucide ; sa paroi peut, avantageusement, pour obtenir des effets de décoration, être ondulée, ou présenter des côtes, par exemple, longitudinales. Le matériau constitutif de l'écran 31 peut être quelconque, puisque l'écran n'est pas en contact avec le produit : il est avantageusement choisi biodégradable.In the example shown in Figures 1 and 3, the container 4 is made of transparent material; a screen 31, made of a tube cut from a sheath obtained by extrusion, is placed in the container 4 and surrounds the pocket 2, by masking it; the screen 31 carries any desired marking and / or decoration. The screen 31 can be opaque or translucent; its wall can, advantageously, to obtain decorative effects, be wavy, or have ribs, for example, longitudinal. The material of the screen 31 can be arbitrary, since the screen is not in contact with the product: it is advantageously chosen to be biodegradable.

Selon un mode de réalisation de la présente invention, la poche 2, représentée sur les figures 1, 3 et 4 est réalisée en un matériau complexe constitué de trois couches ; la couche interne i et la couche externe e sont en un matériau choisi dans le groupe formé par du polyéthylène, du polyéthylène terephtalate, du polychlorure de vinyle, du polypropylène, du polyacrylonitrile, du polyamide, et du polyester. La couche intermédiaire m est en un matériau choisi dans le groupe formé par du chlorure de poly(éthylène/acétate de vinyl) du poly(éthylène/alcool vinylique), du polyacrylonitrile, de l'aluminium, et un polyamide. Ces matériaux sont, en effet, choisis de sorte que le matériau complexe ait une grande flexibilité, pour permettre un fonctionnement aisé de la pompe, et une très faible mémoire de forme pour faciliter le vidage complet de la poche ; ceci suppose, également, que le matériau complexe ait une faible épaisseur : celle-ci n'excède pas, d'ailleurs, 2/10e de mm, tout en étant supérieure à 20 microns. De meilleurs résultats sont obtenus lorsque cette épaisseur n'excède pas 100 microns. L'utilisation d'un matériau complexe pour constituer la poche est dictée par la nécessité d'une étanchéité à l'air, d'une part, et d'une compatibilité avec les produits que la poche doit contenir, d'autre part, comme par exemple, bien que non limitatif, des produits cosmétiques. Un complexe ayant donné satisfaction était constitué de quatre couches successives, respectivement de polyéthylène-téréphtalate, de polyuréthane, d'aluminium, et de polyéthylène.According to an embodiment of the present invention, the bag 2, shown in Figures 1, 3 and 4 is made of a complex material consisting of three layers; the inner layer i and the outer layer e are made of a material chosen from the group formed by polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, polyacrylonitrile, polyamide, and polyester. The intermediate layer m is made of a material chosen from the group formed by poly (ethylene / vinyl acetate) chloride, poly (ethylene / vinyl alcohol), polyacrylonitrile, aluminum, and a polyamide. These materials are, in fact, chosen so that the complex material has great flexibility, to allow easy operation of the pump, and a very small shape memory to facilitate the complete emptying of the bag; this also presupposes that the complex material has a small thickness: this does not exceed, moreover, 2 / 10ths of a mm, while being greater than 20 microns. Better results are obtained when this thickness does not exceed 100 microns. The use of a complex material to constitute the bag is dictated by the need for air tightness, on the one hand, and compatibility with the products that the bag must contain, on the other hand, such as, for example, although not limiting, cosmetic products. A successful complex consisted of four successive layers, respectively of polyethylene terephthalate, polyurethane, aluminum, and polyethylene.

Avantageusement, la couche externe e est en un matériau du groupe formé par polyester, polyéthylène téréphtalate, polyester céramique, polyester métallisé, en particulier aluminisé. Les polyesters traités (atomisation de silice pour polyester céramique, ou métallisation sous vide pour polyester métallisé) assurent une très bonne imperméabilité aux gaz (notamment à l'oxygène) et à la vapeur d'eau. Du côté intérieur, cette couche externe e comporte une pellicule, servant de colle, en un matériau du groupe polyuréthane, polyéthylène, polychlorure de vinylidène. Le point de fusion de la couche externe se situe sensiblement entre 220°C et 280°C.Advantageously, the outer layer e is made of a material from the group formed by polyester, polyethylene terephthalate, ceramic polyester, metallized polyester, in particular aluminized. The treated polyesters (atomization of silica for ceramic polyester, or vacuum metallization for metallized polyester) ensure very good impermeability to gases (in particular to oxygen) and to water vapor. On the inside, this outer layer e has a film, serving as an adhesive, made of a material of the polyurethane, polyethylene, polyvinylidene chloride group. The melting point of the outer layer is substantially between 220 ° C and 280 ° C.

La couche interne i est, de préférence, en polyéthylène, ou en polyéthylène contenant des zéolites chargés de produits aseptisants et/ou d'agents conservateurs. Le point de fusion de la couche interne se situe sensiblement entre 180° et 200° C.The inner layer i is preferably made of polyethylene, or of polyethylene containing zeolites loaded with sanitizers and / or preservatives. The melting point of the inner layer is approximately between 180 ° and 200 ° C.

La fabrication d'un tel matériau complexe n'est possible qu'en bande ; dès lors, la poche 2 est obtenue à partir d'une lanière dont on a soudé les deux bords longitudinaux. Dans l'exemple représenté aux figures 2 et 4 qui montrent le sous-ensemble obtenu après soudage de la poche 2 sur l'embase 7 le long de la portée de soudure 10, la poche 2 est formée à partir d'une lanière dont on a soudé, dans un premier temps, les faces intérieures de deux bords longitudinaux qui sont situées du même côté de la lanière pour obtenir une bande de soudure longitudinale 32, et constituer une gaine qui est coupée à longueur ; dans un deuxième temps, la bande soudée est rabattue sur la surface externe de la poche, et maintenue, à ses extrémités, dans cette position, par soudage de l'extrémité supérieure de la poche 2 sur la portée de soudure 10 de l'embase 7.The production of such a complex material is only possible in strips; therefore, the pocket 2 is obtained from a strap which has been welded the two longitudinal edges. In the example represented in FIGS. 2 and 4 which show the sub-assembly obtained after welding of the pocket 2 on the base 7 along the welding surface 10, the pocket 2 is formed from a strap of which first welded the inner faces of two longitudinal edges which are located on the same side of the strap to obtain a longitudinal weld strip 32, and constitute a sheath which is cut to length; in a second step, the welded strip is folded over the external surface of the pocket, and held, at its ends, in this position, by welding the upper end of the pocket 2 to the welding surface 10 of the base 7.

Cette opération de soudage de l'extrémité supérieure de la poche débute par le soudage de la bande 32 rabattue. Un outil chauffant de soudage, en particulier une molette, vient presser cette bande 32 rabattue contre la surface externe de la poche et contre la portée de soudure 10. La couche externe e, dont le point de fusion est plus élevé, peut être chauffée à une température suffisante pour faire fondre la couche interne i et provoquer le soudage de la portée 10, sans pour autant que cette couche externe e soit traversée par l'outil ou traverse la couche interne. La portée de soudure 10, et plus généralement l'embase 7, sont en une matière qui peut être soudée à la couche interne i ; par exemple l'embase 7 est en polypropylène qui peut être soudé avec un film de polyéthylène.This welding operation of the upper end of the pocket begins with the welding of the folded strip 32. A heating welding tool, in particular a knurling wheel, presses this folded strip 32 against the external surface of the pocket and against the welding surface 10. The external layer e , whose melting point is higher, can be heated to a sufficient temperature to melt the internal layer i and cause the welding of the surface 10, without this external layer e being crossed by the tool or passing through the internal layer. The welding surface 10, and more generally the base 7, are made of a material which can be welded to the internal layer i ; for example the base 7 is made of polypropylene which can be welded with a polyethylene film.

Le soudage de l'extrémité supérieure de la poche 2 a lieu ensuite sur toute la périphérie de la portée 10.Welding of the upper end of the pocket 2 then takes place over the entire periphery of the surface 10.

A son extrémité inférieure, la bande 32 rabattue est soudée en même temps que la gaine selon la bande de soudure 33 transversale qui ferme la poche 2 à sa partie inférieure.At its lower end, the folded strip 32 is welded at the same time as the sheath according to the transverse weld strip 33 which closes the pocket 2 at its lower part.

Avantageusement, la bande 32 rabattue et la bande 33 se croisent dans une portion de la bande 33 éloignée de ses extrémités 33a et 33b.Advantageously, the folded strip 32 and the strip 33 intersect in a portion of the strip 33 remote from its ends 33a and 33b.

Grâce à cette disposition, la section droite de la poche est entièrement contenue dans la section droite du conteneur 4, ce qui autorise et facilite la mise en place de la poche dans le conteneur alors que la poche est déjà pleine. C'est là un des avantages de la poche selon l'invention.Thanks to this arrangement, the straight section of the pocket is entirely contained in the straight section of the container 4, which allows and facilitates the positioning of the pocket in the container when the pocket is already full. This is one of the advantages of the pocket according to the invention.

Ladite poche peut, d'ailleurs, être également remplie par le bas ; la composition et la faible épaisseur du complexe permettent, en effet, de souder l'extrémité inférieure de la poche en pinçant le produit, présent dans la gaine, lors du soudage, ce qui assure qu'il n'y aura pas d'air dans la poche fermée. Il est donc possible d'utiliser une machine de remplissage, sous vide, de la poche par le fond.Said pocket can, moreover, also be filled from below; the composition and the low thickness of the complex allow, in fact, to weld the lower end of the pocket by pinching the product, present in the sheath, during welding, which ensures that there will be no air in the closed pocket. It is therefore possible to use a vacuum filling machine for the bag from the bottom.

Lorsque l'embase n'est pas circulaire, et donc lorsque la portée de soudure 10 n'est pas circulaire, la bande de soudure 32 est située sur la portée de soudure dans une zone où le rayon de courbure est maximum ; des moyens d'indexation de l'embase par rapport au conteneur sont prévus si cette indexation n'est pas obtenue automatiquement par la forme de leur section droite.When the base is not circular, and therefore when the welding surface 10 is not circular, the welding strip 32 is located on the welding surface in an area where the radius of curvature is maximum; means for indexing the base relative to the container are provided if this indexing is not obtained automatically by the shape of their cross section.

La figure 5 montre une variante de distributeur selon l'invention dont le conteneur 104 est constitué d'une gaine 134 en matière souple, avec mémoire de forme, obtenue par extrusion, et fermée à sa partie inférieure par un fond 105 en matière plastique rigide ; le fond 105, rapporté sur la gaine dans l'exemple représenté et solidarisé à celle-ci par exemple par collage ou soudage de l'extrémité 135, peut avoir une section différente de celle de l'embase 107 à laquelle est solidarisée l'extrémité supérieure de la gaine 134 du conteneur 104. Cette solidarisation est obtenue par soudage de la gaine 134 sur une portée de soudage 136 de l'embase 107 située, sur ladite embase, au-dessus de la portée de soudage 110 de la poche souple 102 sur l'embase 107. Le matériau constitutif de la gaine 134 peut être quelconque ; comme cela a été dit à propos de l'écran 31 des figures 1 et 3, il est avantageusement choisi biodégradable.FIG. 5 shows a variant of a dispenser according to the invention, the container 104 of which consists of a sheath 134 made of flexible material, with shape memory, obtained by extrusion, and closed at its lower part by a bottom 105 made of rigid plastic material ; the bottom 105, attached to the sheath in the example shown and secured to it, for example by bonding or welding the end 135, may have a section different from that of the base 107 to which the end is secured sheath 134 upper container 104. This joining is obtained by welding the sheath 134 on a welding surface 136 of the base 107 located, on said base, above the welding range 110 of the flexible bag 102 on the base 107. The material of the sheath 134 may be any; as has been said about the screen 31 of Figures 1 and 3, it is advantageously chosen biodegradable.

Selon cette variante, l'embase 107 présente un manchon 138, s'étendant à l'opposé de la poche 102, sur lequel est montée, par clipsage en 143, une tête de distribution 139 dont l'orifice de distribution 142 est fermé, au repos, par un pointeau 141 porté par une membrane élastique 140 ; un canal 144, en communication avec l'intérieur de la poche 102, permet une distribution du produit par l'orifice de distribution 142 lorsque celui-ci est libéré par le pointeau 141 par action de la pression du produit sur la membrane 140 ; la mise en pression du produit est obtenue par action manuelle sur le conteneur souple 134 et est permise grâce à la présence d'une valve de fond 137 coopérant avec l'orifice 106 de communication avec l'extérieur du volume compris entre la poche 102 et l'intérieur du conteneur 134.According to this variant, the base 107 has a sleeve 138, extending away from the pocket 102, on which is mounted, by clipping at 143, a dispensing head 139 whose dispensing orifice 142 is closed, at rest, by a needle 141 carried by an elastic membrane 140; a channel 144, in communication with the interior of the pocket 102, allows a distribution of the product by the dispensing orifice 142 when the latter is released by the needle 141 by action of the pressure of the product on the membrane 140; pressurization of the product is obtained by manual action on the flexible container 134 and is allowed thanks to the presence of a bottom valve 137 cooperating with the orifice 106 for communication with the outside of the volume between the pocket 102 and inside container 134.

Selon une variante non représentée, le fond 105 est remplacé par une soudure transversale de l'extrémité de fond du conteneur 104.According to a variant not shown, the bottom 105 is replaced by a transverse weld of the bottom end of the container 104.

La figure 6 montre une poche 202 soudée à une embase rigide 207 ; l'embase 207 est munie d'un goulot 215 associé à un élément partiellement élastique 250 pour constituer une valve d'ouverture unidirectionnelle ; l'élément 250 comporte une partie d'accrochage 206 sur un doigt 214 solidaire de l'embase 207 et une partie élastique 208 en forme de membrane tronconique prenant appui élastiquement contre le fond de l'embase ; des ouvertures 217 laissent sortir le produit de la poche alors que la membrane 208 l'en empêche, à moins qu'une pression soit exercée sur les parois de la poche ; un couvercle 245 présente, d'une part, des moyens d'accrochage 246 sur un rebord circulaire 247 de l'embase 207 et, d'autre part, des languettes axiales 248 s'étendant jusqu'à la prériphérie de la membrane 208, en sorte que, lorsque le couvercle 245 est en place sur l'embase 207, une action est exercée sur la périphérie de la membrane appliquée sur son siège constitué par le fond de l'embase, empêchant ainsi toute sortie de produit, même si une action est exercée sur la poche 202 ; cette disposition permet de constituer une recharge de produit, stockable, la poche restant remplie de produit.Figure 6 shows a pocket 202 welded to a rigid base 207; the base 207 is provided with a neck 215 associated with a partially elastic element 250 to constitute a one-way opening valve; the element 250 comprises a hooking part 206 on a finger 214 integral with the base 207 and an elastic part 208 in the form of a frustoconical membrane bearing elastically against the bottom of the base; openings 217 allow the product to exit the bag while the membrane 208 prevents it, unless pressure is exerted on the walls of the bag; a cover 245 has, on the one hand, hooking means 246 on a circular rim 247 of the base 207 and, on the other hand, axial tongues 248 extending to the periphery of the membrane 208, so that, when the cover 245 is in place on the base 207, an action is exerted on the periphery of the membrane applied to its seat formed by the bottom of the base, thus preventing any product outlet, even if an action is exerted on the pocket 202; this arrangement makes it possible to constitute a refill of product, which can be stored, the pocket remaining filled with product.

La figure 7 montre un distributeur mettant en oeuvre la recharge de la figure 6 ; après que le couvercle 245 ait été ôté de l'embase 245, la recharge est introduite dans un conteneur 204 ; une pompe à membrane 239, comme connue en soi, est mise en place sur l'embase 207 sur laquelle elle est maintenue grâce à des moyens d'accrochage 249 portés par le goulot 215 de l'embase, la pompe elle-même portant des moyens d'accrochage complémentaires. On notera que, grâce à cette disposition, le produit contenu dans la recharge n'est jamais remis au contact de l'air jusqu'à son utilisation proprement dite.Figure 7 shows a dispenser implementing the refill of Figure 6; after the cover 245 has been removed from the base 245, the refill is introduced into a container 204; a diaphragm pump 239, as known per se, is placed on the base 207 on which it is maintained by means of attachment means 249 carried by the neck 215 of the base, the pump itself carrying additional hanging means. It will be noted that, thanks to this arrangement, the product contained in the refill is never brought back into contact with air until its use proper.

La pompe à membrane peut également comporter un clapet anti-retour 251 analogue au clapet 250 porté par l'embase : c'est la variante représentée figure 8.The diaphragm pump can also include a non-return valve 251 similar to the valve 250 carried by the base: this is the variant shown in FIG. 8.

La figure 9 montre une autre variante de distributeur dont les éléments semblables à des éléments décrits précédemment sont désignés par les mêmes chiffres des unités et des dizaines, précédés d'un chiffre 3 des centaines. Leurs description ne sera pas reprise ou ne sera effectuée que succinctement.FIG. 9 shows another variant of a dispenser, the elements of which similar to the elements described above are designated by the same numbers of units and tens, preceded by a digit 3 of hundreds. Their description will not be repeated or will be made only succinctly.

On retrouve un conteneur 304, une poche flexible 302 soudée sur une embase 307 munie d'un organe anti-prisonnier 327. Une pompe 339 à membrane M est montée sur l'embase. Le corps de pompe 339 peut tourner, autour de l'axe du conteneur 304, entre une position de fermeture et une position d'ouverture.There is a container 304, a flexible pocket 302 welded to a base 307 provided with an anti-prisoner member 327. A pump 339 with membrane M is mounted on the base. The pump body 339 can rotate, around the axis of the container 304, between a closed position and an open position.

Le corps de la pompe 339 comporte un manchon 360 cylindrique de révolution coaxial au conteneur 304. Ce manchon 360 est encliqueté, avec possibilité de rotation autour de son axe, dans un goulot 315 cylindrique de révolution de l'embase 307. Un noyau creux 361, solidaire de l'embase 307 est engagé dans le manchon 360, au contact de sa paroi intérieure. Le volume interne du noyau 361 communique avec la poche 302.The pump body 339 comprises a cylindrical sleeve 360 of revolution coaxial with the container 304. This sleeve 360 is snapped, with the possibility of rotation about its axis, in a neck 315 cylindrical of revolution of the base 307. A hollow core 361 , secured to the base 307 is engaged in the sleeve 360, in contact with its inner wall. The internal volume of the core 361 communicates with the pocket 302.

La paroi interne du manchon 360 comporte des rainures longitudinales 362, régulièrement espacées, s'étendant au-dessus du noyau 361 pour déboucher dans un espace 363 fermé par un clapet 350.The internal wall of the sleeve 360 has longitudinal grooves 362, regularly spaced, extending above the core 361 to open into a space 363 closed by a valve 350.

La paroi cylindrique du noyau 361 comporte des fenêtres longitudinales 364, ayant le même espacement angulaire que les rainures 362. La longueur des fenêtres 364 est suffisante pour qu'elles puissent communiquer avec les rainures 362 lorsqu'elles occupent la même position angulaire. Ceci correspond à la position d'ouverture de la figure 10. Lorsque la membrane M est actionnée, pour le pompage, le produit passe par les fenêtres 364, et les rainures 362, comme indiqué par la flèche, pour arriver dans l'espace 363, franchir le clapet 350 et sortir du bec distributeur de la pompe.The cylindrical wall of the core 361 has longitudinal windows 364, having the same angular spacing as the grooves 362. The length of the windows 364 is sufficient for them to be able to communicate with the grooves 362 when they occupy the same angular position. This corresponds to the open position of FIG. 10. When the membrane M is actuated, for pumping, the product passes through the windows 364, and the grooves 362, as indicated by the arrow, to arrive in the space 363 , cross the valve 350 and exit the distributor nozzle of the pump.

Lorsque le corps de pompe 339 est tourné d'un angle approprié, relativement à l'embase 307, les bandes de matière 365, comprises entre les fenêtres 364, viennent fermer le passage vers les rainures 362. Cette position de fermeture, illustrée sur la figure 11, permet d'augmenter la protection du produit de la poche, vis-à-vis de l'air, au stockage entre deux utilisations.When the pump body 339 is turned by an appropriate angle, relative to the base 307, the strips of material 365, included between the windows 364, close the passage to the grooves 362. This closed position, illustrated in the Figure 11, increases the protection of the product from the bag, vis-à-vis the air, storage between two uses.

Il est à noter que l'ensemble de la poche et de l'embase peut être recyclé pour la fabrication de nouvelles embases. En effet, la masse de la poche est très faible par rapport à celle de l'embase et la quantité de matériau non compatible de la poche est négligeable. Les rebuts de fabrication peuvent donc être réutilisés.It should be noted that the entire pocket and the base can be recycled for the manufacture of new bases. Indeed, the mass of the pocket is very small compared to that of the base and the amount of non-compatible material of the pocket is negligible. Manufacturing waste can therefore be reused.

Claims (19)

  1. A dispenser (1) for a liquid or pasty product, comprising a container (4, 104), within which there is disposed a bag (2, 102) made of an easily deformable composite plastic without any renewed air intake, a base (7, 107) carrying the dispensing element (8-9, 139) being mechanically held in position relative to the container (4, 104), a bottom end of the said bag (2, 102) being welded along a band (33, 133), a dispenser wherein the said bag (2, 102) is formed from a sheath obtained by welding the longitudinal edges of a strip along at least one longitudinal band (32, 132), the peripheral length of the cross-section of the sheath being equal to the peripheral length of the base (7, 107), the said longitudinal weld band (32, 132) intersecting the said weld band (33, 133) of the bottom end in a zone distinct from the ends (33a, 33b, 133a, 133b) of the said weld band (33, 133) of the bottom end, characterized in that:
    - the longitudinal weld band (32, 132) welds an internal face of a longitudinal edge of the strip from which the said bag (2, 102) is formed, to the internal face of the other longitudinal edge of the strip situated on the same side of the strip as the preceding one,
    - the base (7, 107) has a weld bearing surface (10, 110), and
    - the welded assembly of the two longitudinal edges of the strip is folded against the external surface of the sheath and welded in this position by welding the end of the bag (2, 102) onto the weld bearing surface (10, 110) of the base.
  2. A product dispenser according to claim 1, characterized in that the weld bearing surface (10, 110) has at all points a radius of curvature which is greater than 0.5 mm.
  3. A product dispenser according to claim 1, characterized in that the strip from which the said bag (2, 102) is formed has a thickness comprised between 20 and 200 microns.
  4. A product dispenser according to claim 1 or 3, characterized in that the bag (2, 102) is made from a composite material formed by at least three layers, an internal layer whereof is directly welded to the weld bearing surface (10, 110) of the base (7, 107) and an external layer is intended for the mechanical protection of the bag (2, 102).
  5. A product dispenser according to claim 4, characterized in that the material of the internal layer has a fusion point which is lower than that of the material of the external layer.
  6. A product dispenser according to claim 4 or 5, characterized in that the internal layer and/or the external layer is made of a material of the group formed by polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, polyacrylonitrile, aluminium, polyamide, polyester.
  7. A product dispenser according to claim 4 or 5, characterized in that the intermediate layer disposed between the external layer and the internal layer is made of a material of the group formed by poly(vinyl ethylene/acetate) chloride, poly(vinyl ethylene alcohol), polyacrylonitrile, aluminium, polyamide.
  8. A product dispenser according to claims 1 to 3, characterized in that the assembly (32) of the two longitudinal edges soldered and folded against the external surface of the sheath is welded in this position by the weld band (33, 113) of the bottom end of the bag (2, 102).
  9. A product dispenser according to claim 1, characterized in that the longitudinal weld band (32, 132) of the bag (2, 102) is situated in the zone of the weld bearing surface (10, 110) of the base (7, 107) where the radius of curvature is greatest.
  10. A product dispenser according to claim 1, characterized in that the weld band (33, 133) of the bottom end is straight.
  11. A product dispenser according to claim 1, characterized in that the weld band (33, 133) of the bottom end is in a broken line or curvilinear.
  12. A product dispenser according to claim 1, characterized in that the base (7, 107) has stop means cooperating with the upper edge of the container (4, 104).
  13. A product dispenser according to claim 1, characterized in that the container (4) is made of a rigid material and has an air intake opening (6).
  14. A product dispenser according to claim 1, characterized in that the container (104) is made of flexible memory material and is associated wish a valve (137) disposed in a direction such that the air present in the container (104) is compressed when an action is exerted on the container with a view to dispensing the product contained in the bag (102).
  15. A product dispenser according to claim 19, characterized in that the container (4) is made of a transparent material and is associated with a screen (31) disposed inside the container (4) outside the bag (2), the said screen (31) masking the said bag (2).
  16. A product dispenser according to claim 14, characterized in that the container (104) is welded to the base (107) opposite a weld bearing surface (136) disposed above the weld bearing surface (110) of the bag (102) on the base (107).
  17. A product dispenser according to claim 14, characterized in that the container (104) receives at its end on the opposite side to that which receives the base (107), a bottom (105) joined to the container (104) by welding or bonding.
  18. A product dispenser according to claim 1, characterized in that the dispensing element (8, 139) is a membrane pump, a needle valve (141) or a manual pump.
  19. A product dispenser according to claim 1, wherein a pump (339) is mounted on the base (307), characterized in that the pump body (339) is capable of turning about the axis of the container (64) between a closed position and an open position.
EP93909029A 1992-04-30 1993-04-19 Product dispenser with deformable bag Expired - Lifetime EP0592637B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9205377 1992-04-30
FR9205377A FR2690674B1 (en) 1992-04-30 1992-04-30 PRODUCT DISPENSER WITH DEFORMABLE POCKET.
PCT/FR1993/000384 WO1993022220A1 (en) 1992-04-30 1993-04-19 Product dispenser with deformable bag

Publications (2)

Publication Number Publication Date
EP0592637A1 EP0592637A1 (en) 1994-04-20
EP0592637B1 true EP0592637B1 (en) 1995-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93909029A Expired - Lifetime EP0592637B1 (en) 1992-04-30 1993-04-19 Product dispenser with deformable bag

Country Status (7)

Country Link
US (2) US5477985A (en)
EP (1) EP0592637B1 (en)
JP (1) JP3396221B2 (en)
DE (1) DE69300910T2 (en)
ES (1) ES2081713T3 (en)
FR (1) FR2690674B1 (en)
WO (1) WO1993022220A1 (en)

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US5505338A (en) 1996-04-09
JP3396221B2 (en) 2003-04-14
FR2690674A1 (en) 1993-11-05
EP0592637A1 (en) 1994-04-20
US5477985A (en) 1995-12-26
DE69300910T2 (en) 1996-08-14
WO1993022220A1 (en) 1993-11-11
DE69300910D1 (en) 1996-01-11
ES2081713T3 (en) 1996-03-16
JPH06507870A (en) 1994-09-08
FR2690674B1 (en) 1996-01-26

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