EP0260179B1 - Assembly for the separate storage of two products and simultaneous distribution after mixing - Google Patents

Abstract

The unit delimits two compartments which are intended to contain each one product and which are separated by a separating element constituted by at least one cover perforatable as a result of the manipulation of a mixing perforator. This perforator is placed into one of the compartments, so that its cutting end comes to be near the above-mentioned separating element in the storage position, and that its other end is situated opposite a deformable obturating partition of the compartment. An element for manipulating the perforator is disposed in the extension of this latter, on the other side of the partition; it is displaceable for translation to pass from the storage position to a mixing position wherein it is acting on the perforator through the partition to cause it to cut the separating element. Can be used for storing a hair dye.

Description

The present invention relates to an assembly making it possible to package two products separately and to distribute them simultaneously after they have been brought into contact with one another.

Such packaging makes it possible to preserve, independently of one another, two products, and to subsequently carry out their mixing, for example, at the time of their use. They are used in many fields.

One can thus mention by way of example, in the field of hair dyes, the conditioning of a coloring substance and of an oxidizing substance, which should only be mixed at the time of use.

Mention may be made of other examples involving separate packaging of a solid product in powder form and of a liquid product, which is in particular a solvent for the solid considered, the solution of the solid in the liquid being unstable and cannot be kept for a long time while keeping its properties.

In all cases, rather than packaging the products separately and mixing them at the time of use by opening each of the two packages, it is preferable for the two products to be packaged within the same unit, and qu 'a particular maneuver applied to said assembly allows contacting at the time of use.

Patent application FR-A 2 592 861 published on July 17, 1987 proposes an assembly for this type of packaging, which is produced in two parts: the first comprising two compartments separated from each other by at least one cover tearable; the second being constituted by a perforating capsule. At the time of use, the user removes a plug closing one of the compartments of the first part of the packaging and replaces it with the perforating capsule. This assembly is adapted so that the conservation of the products contained in each of the compartments is obtained as a result of a secure, linkable and controllable seal.

In FR-A 2 270 163 which corresponds to the preamble of claim 1, an assembly has been proposed comprising two compartments and a plug, the first compartment being closed by a cover and the second compartment not being closed by a cover. A trocar is attached to the bottom of the stopper which does not have an operating member.

However, it is believed that this structure could be improved by automatic manipulation of a complete assembly: this is the aim of the present invention.

To this end, provision is made for the trocar intended to produce the mixing of the products to be arranged in a compartment, the operation of this trocar being ensured by a member disposed outside said compartment, in line with said trocar, opposite of its cutting part, said member and said trocar being separated by a deformable wall, so that the operating member can pass from a storage position where it is spaced from said trocar, to a mixing position in which it pushes said trocar, being engaged with it through said deformable wall.

According to an advantageous characteristic of the invention, this deformable wall is constituted by a perforable cover, the member for operating the trocar also being constituted by a trocar, which is advantageously integral with a dispensing tip, which is mounted in a manner watertight on the compartment housing the mixing trocar. In this way, the sealing of the compartment containing the mixing trocar is improved as well as the good storage conservation of the product contained therein.

The present invention therefore relates to the new industrial product that constitutes an assembly making it possible to package two products and to distribute them simultaneously after they have been brought into contact, this assembly constituting two compartments which are separated by a separation member consisting of at least one cover which can be perforated by the operation of a mixing trocar, characterized in that the mixing trocar is entirely placed in one of the compartments, so that its cutting end comes, in the storage position of said assembly, to the in the vicinity of said separation member, and that its opposite end is situated opposite a deformable closure wall of said compartment, the operating member of said mixing trocar being arranged in the extension of the latter, on the side of said partition wall deformable closure where the mixing trocar is not located, and being mounted displaceable in translation to pass from one po storage location where it is not in contact with the mixing trocar, at a mixing position, in which it acts on said mixing trocar to cause it to perforate said separation member.

In particular, the deformable closure wall of the compartment housing the mixing trocar is constituted by a perforable cover, and the operating member of the mixing trocar is constituted by an operating trocar integral with a distribution nozzle adapted on a sleeve, which delimits the compartment where the mixing trocar is housed.

Furthermore, the sleeve is fitted on the outlet end of a container delimiting the other compartment of the assembly, and carries the separation member from the two compartments, this separation member advantageously consisting of two perforable heat-sealed lids. or heat-sealed, the first, ensuring the seal, being fixed on an internal skirt of the end of the sleeve, and the second, parallel to the first, ensuring the security of the shutter, and being fixed on an external skirt of the said sleeve, protruding from the previous one.

According to a particular embodiment of the assembly according to the invention, the sleeve is connected to the container delimiting the compartment which does not include the mixing trocar by a connecting element.

Such a connection element comprises in particular a peripheral ring comprising means complementary to a means carried by the external skirt of the sleeve for the liquid-tight attachment of the latter to said connection element.

Furthermore, the aforementioned container ends in a neck comprising means complementary to means carried by the connection element for the assembly of the latter on said container, said connection element also comprising means ensuring the tightness of its assembly. with the container.

The members of the container, of the sleeve and of the connection element, which cooperate with each other, are, for example, of cylindrical shape, means being then provided to prevent rotation, on the one hand, of the container, and, d 'other hand, the sleeve relative to the connecting element.

According to another characteristic of the assembly according to the present invention, the dispensing nozzle is constituted by a peripheral skirt connected to a bottom comprising the ejection orifice and carrying the operating trocar, said lateral skirt cooperating with a neck formed at the corresponding end of the sleeve, said skirt and said neck being mounted movable in translation relative to one another; in particular, the peripheral skirt of the closure end piece and the neck of the sleeve can cooperate with each other by screwing.

In addition, the peripheral skirt of the dispensing end piece can come to cover the neck of the sleeve, an outer guarantee and tamper-evident ring being interposed, in the storage position, between said removable skirt and the body of the sleeve.

Furthermore, it can advantageously be provided that the compartment housing the mixing trocar comprises means for retaining said mixing trocar, in the storage position, as well as means for guiding the latter, when it is maneuvered, as well as 'a stop against which said mixing trocar abuts at the end of the stroke.

Thus, the sleeve may include an internal collar carrying a tubular sheath emerging from said sleeve, opposite the cutting part of the mixing trocar, the emerging end of said sheath receiving the perforable sealing cap, said sheath constituting the means retaining and guiding said mixing trocar and the internal edge of said flange, constituting the stop which delimits the stroke of said mixing trocar, the dispensing nozzle comprising a sealing skirt cooperating with the external wall of said sheath.

The mixing trocar and the operating trocar may each consist of at least one fin, the edge of the cutting end of which is bevelled.

To better understand the object of the present invention, we will now describe, by way of purely illustrative and nonlimiting example, an embodiment shown in the accompanying drawing.

• - la figure 1 est une vue en perspective de l'ensemble selon la présente invention, alors qu'un utilisateur en détache la bande de garantie et d'inviolabilité, juste avant l'emploi ;
• - la figure 2 est une vue éclatée avec arrachements montrant tantôt en coupe axiale, tantôt en élévation, tous les éléments constituant l'ensemble de la figure 1 ;
• - les figures 3 et 4 sont des vues en coupe axiale de la partie supérieure de l'ensemble de la figure 1 dans les positions respectivement de stockage et d'utilisation ; et
• - la figure 5 est une vue en coupe selon V-V de la figure 3.

On this drawing :

• - Figure 1 is a perspective view of the assembly according to the present invention, while a user detaches the security tape and inviolability, just before use;
• - Figure 2 is an exploded view with cutaway showing sometimes in axial section, sometimes in elevation, all the elements constituting the assembly of Figure 1;
• - Figures 3 and 4 are views in axial section of the upper part of the assembly of Figure 1 in the positions of storage and use respectively; and
• - Figure 5 is a sectional view along VV of Figure 3.

Referring to the drawing, it can be seen that an assembly has been shown for the separate packaging of an oxidant and a dye, contained in compartments, designated respectively by 2 and 3, said oxidant and said dye not to be mixed, to form a hair dye, only at the time of their use.

The compartment 2 is constituted by the interior of a bottle 4 on the end of which is adapted, by means of a connection element 5, a sleeve 6 whose opening adjacent to said bottle 4 is closed by two perforable covers 7 and 8, arranged one above the other, the first 7 ensuring the seal, and the second 8 constituting a security cover. The opposite opening of the sleeve 6 is closed by a perforable cover 9. The sleeve 6 and the covers 7 and 9 define the sealed compartment 3, containing, in the storage position, the dye. Furthermore, in the sleeve 6, is axially disposed a mixing trocar 10 which, in its storage position, extends between the lids 7 and 9, its cutting end being in abutment on the latch 7. On the sleeve 6 , adapts a dispensing tip 11, the maneuver of which allows the trocar 10 to move in translation, maneuver during which the three lids 7, 8 and 9 are perforated, the dye 3 can thus mix with the oxidant 2 , to form the hair dye to be applied. The lids 7, 8 and 9 are made of aluminum.

The bottle 4, made, for example, of high density polyethylene, has an elongated cylindrical body 12, comprising, at one of its ends, a bottom 13, and, at its other end, a neck 14; the neck 14 is connected to the side wall of the body 12 by an annular shoulder 15, very slightly frustoconical. The neck 14 has, above its junction zone with the shoulder 15, a peripheral bead 16, and, between said shoulder 15 and its free edge, a thread 17. The external lateral wall of the bead 16 includes anti-notches rotation 18, the role of which is indicated below. Furthermore, the shoulder 15 has, on its outer face, four radial ribs 19, arranged at right angles, each rib 19 extending between, on the one hand, the junction area of the neck 14 and the shoulder 15 , under the bead 16 and, on the other hand, the vicinity of the side wall of the cylindrical body 12.

The connecting element 5 is made, for example, of polypropylene. It is constituted by a cylindrical peripheral ring 20 carrying internally, substantially at mid-height, an annular collar 21, which is folded square along its inner edge to form a sealing skirt 22, coaxial with the ring 20. Furthermore, between the latter and the inner skirt 22, the collar 21 carries, on the same side as said skirt 22, a coaxial skirt 23 extending beyond said skirt 22, but below here of the ring 20. The ring 20 has a cylindrical external wall which has axial ridges 24 on the outside to facilitate the operation of said connection element 5.

In addition, the ring 20 has internally, along its edge located on the side of the skirts 22 and 23, an annular bead 25; as for the region of its inner wall located opposite the collar 21, it successively comprises, from the vicinity of said collar 21 towards the free edge, a zone in excess thickness 26, then a groove 27, the part of which adjoins the zone in extra thickness 26 includes anti-rotation notches 28.

The skirt 22 has a slight recess 29 towards the inside of its external wall, from the vicinity of its free edge 30, which is bevelled.

The skirt 23 has, in the vicinity of its free internal border, an annular shoulder 31 directed inwards, which divides it into a main part of relatively large thickness comprising an internal thread 32, complementary to the thread 17 carried by the bottle 4, and an end portion internally comprising anti-rotation notches 33, intended to cooperate with the anti-rotation notches 18 carried by the bottle 4. The internal edge 34, below the shoulder 31, is bevelled.

The collar 21 comprises, on the side of the skirts 22 and 23, and between them, an annular bead 35. There are also provided, on this same side, reinforcing fins 36, in the form of a square, connected with a on the one hand, to the external wall of the skirt 23, and, on the other hand, to the annular wall of the collar 21 situated between the said skirt 23 and the outer ring 20.

The sleeve 6 is advantageously produced by injection molding of poly (vinyl chloride). It comprises a cylindrical body 37 which is connected, by a shoulder 38, of frustoconical shape, to a neck 39 comprising an external thread 40.

In the vicinity of its free border opposite the neck 39, the cylindrical body 37 has an extension 41, directed outwards, of frustoconical shape, widening towards said free border, the extension 41 being folded outwards to constitute a skirt 42, coaxial with the body 37, having externally, in the vicinity of the extension 41, a peripheral ring 43 under which are provided anti-rotation notches 44. The assembly constituted by the ring 43 and the anti-rotation notches 44 is intended to cooperate with the groove 27 of the connection element 5, the notches 44 having to be inserted between the notches 28 of said connection element 5. On its external free edge, the skirt 42 has a chamfer 45.

In the space delimited by the neck 39, the sleeve 6 comprises an internal annular flange 46 disposed a short distance from the shoulder 38. This flange 46 carries, directed towards the outlet mouth of the sleeve 6, a tubular sheath 47, coaxial with the neck 39 and slightly protruding therefrom.

Inside the sleeve 6, is placed a mixing trocar 10 constituted by four fins 48 placed at right angles. Each fin 48 has the shape of an elongated rectangle, a border 49 of which is bevelled, the fins 48 being arranged so that the borders 49 converge in a point towards the inside, in the axis of said trocar 10, thus constituting the part sharp of the latter. Just above this cutting part, the fins 48 are joined by a cylindrical ring 50, the axis of which coincides with that of said trocar 10 and which externally connects the fins 48. Furthermore, at their end opposite to the cutting part , the fins 48 have, on their edge, axial ribs 51 whose role is indicated below. Trocar 10 is obtained, for example, by molding a relatively rigid plastic, such as polypropylene.

The dispensing nozzle 11 is advantageously also made of a relatively rigid plastic material such as polypropylene. It consists of a cylindrical peripheral skirt 52 connected, on the one hand, to a bottom 53, and, on the other hand, to a guarantee and tamper-evident band 54, which is tearable. The cylindrical skirt 52 has internally a thread 55, complementary to the thread 40 carried by the sleeve 6, and externally, axial grooves 56, intended to facilitate the operation of said end piece 11. The bottom 53 consists of a part 57 of general shape frustoconical which tapers gradually to form a nozzle 58 closed by a sectionable plug 59. The bottom 53 has an inner skirt 60, coaxial with the skirt 52, shorter than the latter, and the inner wall of which carries the along its free edge, a peripheral bead 61. In the storage position, which is that of FIG. 3, the bead 61 is in abutment just at the upper part of the sheath 47, the skirt 60 being introduced only by its end in the annular space which is located between the sheath 47 and the neck 39. In this position, the cutting part formed by the base of the fins 62 is not in contact with the upper cover 9.

In the space delimited by the skirt 60, the bottom 53 comprises an operating trocar 62 constituted by four radial fins, arranged at 90 °, the lower edges 63 of which are bevelled, so that the four bevelled edges constitute a cutting element forming a central perforating tip. Furthermore, the fins of the operating trocar 62 are stiffened by end strips 64 arranged perpendicular to the fins (FIG. 5).

The security and tamper-evident strip 54 is located in the extension of the skirt 52, to which it is connected by fasteners 65, arranged from place to place and having a very small thickness, so as not to offer resistance during the tearing off of this strip 54, which is started by grasping the gripping tab 66 (shown in FIG. 1).

• - on scelle l'opercule 7 contre la bordure libre du corps 37 du manchon 6, puis l'opercule 8, contre la bordure libre de la jupe 43 ;
• - on vient fixer axialement l'élément de raccordement 5 sur le manchon 6, en le faisant coulisser par rapport à celui-ci jusqu'à ce que la gorge 27 de l'élément 5 reçoive le jonc 43 de la jupe 42 du manchon 6, les crans anti-rotation 28 et 44 coopérant entre eux pour empêcher tout mouvement de pivotement relatif entre le manchon 6 et l'élément de raccordement 5 ;
• - on introduit la quantité utile de colorant dant le compartiment 3 délimité par le manchon 6 et l'opercule 7 ;
• - on met en place le trocart 10, en l'introduisant axialement dans le manchon 6 par l'ouverture définie par le fourreau 47, le trocart 10 étant maintenu en position par appui des nervures 51 contre la paroi supérieure interne du fourreau 47 ; dans cette position, la partie inférieure coupante du trocart 10 est en appui contre l'opercule 7 ;
• - on scelle sur le rebord du fourreau 47 le troisième opercule d'aluminium 9 ;
• - la mise en place de l'embout de distribution 11 s'effectue alors par vissage de ce dernier sur le col fileté 39 du manchon 6 ;
• - après avoir introduit la quantité nécessaire d'oxydant dans le flacon 4, on dispose, sur ledit flacon 4, le sous-ensemble, dont le montage vient d'être exposé ; la fixation s'effectue par vissage de l'élément 5 dudit sous-ensemble sur le goulot 14 du flacon 4, jusqu'à ce que le bourrelet 16 du goulot 14 du flacon 4 soit entouré par la partie inférieure de moindre épaisseur de la jupe 23 de l'élément 5, les crans anti-rotation 33 coopérant avec les crans anti-rotation 18 du goulot 14 : de la sorte, on interdit tout mouvement de pivotement relatif entre le flacon 4 et l'élément 15 ; la coopération des nervures radiales 19 et du bourrelet 25 agit dans le même sens.

The packaging by means of the assembly, which has just been described, is carried out as follows:

• - The cover 7 is sealed against the free edge of the body 37 of the sleeve 6, then the cover 8, against the free edge of the skirt 43;
• - We just axially fix the connecting element 5 on the sleeve 6, sliding it relative to the latter until the groove 27 of the element 5 receives the rod 43 of the skirt 42 of the sleeve 6, the anti-rotation notches 28 and 44 cooperating with each other to prevent any relative pivoting movement between the sleeve 6 and the connection element 5;
• - Introducing the useful amount of dye into the compartment 3 delimited by the sleeve 6 and the cover 7;
• - The trocar 10 is put in place, by introducing it axially into the sleeve 6 through the opening defined by the sheath 47, the trocar 10 being held in position by pressing the ribs 51 against the internal upper wall of the sheath 47; in this position, the lower cutting part of the trocar 10 bears against the cover 7;
• - The third aluminum seal 9 is sealed on the edge of the sheath 47;
• - The establishment of the dispensing nozzle 11 is then carried out by screwing the latter onto the threaded neck 39 of the sleeve 6;
• - After having introduced the necessary quantity of oxidant into the bottle 4, there is, on said bottle 4, the sub-assembly, the mounting of which has just been exposed; the fixing is carried out by screwing of the element 5 of said sub-assembly on the neck 14 of the bottle 4, until the bead 16 of the neck 14 of the bottle 4 is surrounded by the lower part of lesser thickness of the skirt 23 of the element 5, the anti-rotation notches 33 cooperating with the anti-rotation notches 18 of the neck 14: in this way, any relative pivoting movement between the bottle 4 and the element 15 is prohibited; the cooperation of the radial ribs 19 and the bead 25 acts in the same direction.

It can be seen that, in this way, the sealing of the compartment 3 containing the dye is perfectly achieved, on the one hand, by the two lower lids 7 and 8 and, on the other hand, by the upper liner 9 and finally, by pressing the bead 61 of the skirt 60 of the dispensing nozzle 11 against the sheath 47 of the sleeve 6.

The tightness of compartment 2 containing the oxidant is also satisfactory. However, it will be noted that between the cover 8 and the collar 21 of the connection element 5, a very small clearance is left allowing possible evacuation of a gas resulting from the decomposition of the oxidant contained in the bottle 4. Indeed, if this oxidant is hydrogen peroxide, the decomposition of the latter results in the production of oxygen which can create an overpressure inside the bottle 4 damaging to its conservation. Due to the game described above, oxygen can escape from the bottle 4 passing between the skirt 42 of the sleeve 6 and the peripheral ring 20 of the connecting element 5; a micro-leak is thus produced.

When the user wishes to dispense the mixture of the oxidant 2 and the dye 3, he need only tear off the security and tamper-evident strip 54, by grasping the tab 66. Once the strip 54 has been torn off, the the user screws the dispensing end piece 11 fully onto the sleeve 6, which brings the assembly into the position of FIG. 4. During this screwing movement, the four perforating fins 62 come to pierce the upper cover 9, these fins then causing the downward translation of the trocar 10, which carries out the perforation of the cover 7, then of the cover 8. At the end of the race, the trocar 10 is retained by the inner edge of the flange 46, which serves as a stop for the lower edge of the ribs 51 of the trocar 10. In the opening movement of the two lids 7 and 8, the ring 50 ensures maximum opening, so that, thereafter, the mixture of the oxidant and dye is carried out under the best possible conditions sibles.

When the user wishes to dispense this mixture, it is sufficient for him to agitate the assembly, then to cut the plug 59, which makes it possible to free the mouth of the nozzle 58.

It is understood that the embodiment described above is in no way limiting and may give rise to any desirable modifications, without departing from the scope of the invention, as defined in the claims.

Claims (14)

1. A unit allowing two products to be stored and to be simultaneously dispensed after they have been brought into contact, this unit delimiting two compartments (2, 3) which are each intended to contain one product and which are separated by a separating element constituted by at least one cover (7, 8) which can be perforated by the manipulation of a mixing perforator (10), characterized in that the perforator (10) is entirely placed into one, (3), of the compartments (2, 3), so that its cutting edge should, in the storage position of the said unit, come to be near the said separating element, and that its opposite end is situated opposite a deformable obturating wall (9) of the said compartment (3), the element for manipulating the said mixing perforator (10) being disposed in the extension of this latter, on the side of the said deformable obturating wall (9) without the mixing perforator (10), and being displaceably mounted for translation to pass from a storage position where it is not in contact with the mixing perforator (10), into a mixing position wherein it acts on the said mixing perforator (10) to bring it to perforate the said separating element.

2. A unit according to claim 1, characterized in that the deformable obturating wall of the compartment (3) accomodating the mixing perforator (10) is constituted by a perforable cover (9) and that the element for manipulating the mixing perforator (10) is constituted by a manipulating perforator (62) integral with a dispensing end fitting (11) fitted on a sleeve (6) which delimits the compartment (3) wherein the mixing perforator (10) is accommodated.

3. A unit according to claim 2, characterized in that the sleeve (6) is fitted at the outlet end of a container (4) delimiting the other compartment (2) of the unit and carries the element (7, 8) separating the two compartments (2, 3).

4. A unit according to claim 3, characterized in that the separating element is constituted by two perforable thermo-welded or heat-sealed covers (7, 8), the first (7) ensuring the seal, being fixed on an internal end skirt of the sleeve (6) and the second (8) parallel to the first (7), ensuring the secure- ness of the obturation and being fixed on an external skirt (42) of the said sleeve (6), projecting from the former.

5. A unit according to one of claims 2 to 4, characterized in that the sleeve (6) is connected to the container (4) delimiting the compartment (2) which does not contain the mixing perforator (10), by a connector element (5).

6. A unit according to claims 4 and 5 taken simultaneously, characterized in that the connector element (5) comprises a peripheral ring (20) containing a means (27, 28) complementary to a means (43, 44) carried by the external skirt (42) of the sleeve (6) for attaching the latter to the said connector element (5) in a manner leak proof to liquids.

7. A unit according to one of claims 5 or 6, characterized in that the container (4) terminates in a neck (14) comprising means (16, 17, 18, 19) complementary to means (33, 32, 25) carried by the connector element (5) for fitting this latter on the said container (4), the said connector element (5) also comprising means (35) which ensure the seal of its joint with the container (4).

8. A unit according to one of claims 6 or 7, characterized in that the elements of the container (4), of the sleeve (6) and of the connector element (5) which cooperate with each other, have a cylindrical shape, provision being made for means (18, 33, 28, 44) for preventing the rotation of the container (4) on the one hand and of the sleeve (6) on the other hand, in relation to the connector element (5).

9. A unit according to claim 2, characterized in that the dispensing end fitting (11) is constituted by a peripheral skirt (52) joined to a top (53) comprising the ejection orifice and carrying the manipulating perforator (62), the said lateral skirt (52) cooperating with a neck (39) formed at the corresponding end of the sleeve (6), the said skirt (52) and the said neck (39) being displaceably mounted for translation in relation to each other.

10. A unit according to claim 9, characterized in that the peripheral skirt (52) of the dispensing end fitting (11) and the neck (39) of the sleeve (6) cooperate with each other by screwing.

11. A unit according to one of claims 9 or 10, characterized in that the peripheral skirt (52) of the dispensing end fitting (11) comes to surmount the neck (39) of the sleeve (6), an external security and integrity ring (54) being interposed in the storage position, between the said skirt (52) and the body of the sleeve (6).

12. A unit according to one of claims 1 to 11, characterized in that the compartment (3) accommodating the mixing perforator (10) comprises means (47) for retaining the said mixing perforator (10) in the storage position, as well as means (47) for guiding the latter when it is being manipulated.

13. A unit according to one of claims 1 to 12, characterized in that the compartment (3) accommodating the mixing perforator (10) comprises a stop (46) against which the said mixing perforator (10) comes to bear at the end of its travel.

14. A unit according to claims 2, 12, and 13 taken simultaneously, characterized in that the sleeve (6) comprises an internal flange (46) carrying a tubular liner (47) projecting from the said sleeve (6) on the opposite side to the cutting portion of the mixing perforator (10), the emergent end of the said liner (47) receiving the perforable obturating cover (9), the said liner (47) constituting the means for retaining and guiding the said mixing perforator (10), and the internal edge of the said flange (46) constituting the stop which limits the travel of the said mixing perforator (10), the dispensing end fitting (11) comprising a sealing skirt (60) cooperating with the external wall of the said liner (47).

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