Deformable membrane assembly with no air intake for the delivery of fluid to pasty consistency products

- 2 ~ 29 ~ 6 ~ PRODUCT DISTRIBUTION SET DECONSISTANCE FLUID PASTE NO RESUME AIRCOMPORTANT A DÉFORMABLE.La MEMBRANE Presen e ~ A consis set of product distribution5 of ~ dence to pasty fluid with a head anda container distribution fitted with a dispensing orifice susceptibled'être open or closed by Ull pin maneuvered in translation deformable unemembrane. This set is usable, not ~ mm ~ nt for ladistribution cosmetics, eg cream solaire.Dans this description and claims, onentend by "fluid" means any product as liquid as cream or paste may to écouler.On known from FR-a-829 056, an assembly comprisinga flexible material in a container containing the fluid to distribuer15 and a dispensing head comprising a dome provided with at least unorifice of 8tre closed likely distribution by a pin mobileporté by an elastically deformable membrane, the orifice étantobturé by the spike in the absence of any overpressure on the laditemembrane cate where ledi ~ pin and being released when ON20 applies a pressure on said membrane on the side where it is located leditpicot, the container and the DBME constituting a single piece obtained parmoulage, a rigid insert being put in place at the base of the dome etdélimitant, between it and the dome, a space, said insert comprising atleast one channel, which connects said space and the container 25 and bearing in vis-à-vis the port, membrane de ~ ormable, Thelatter giving the stud a bearing force against the edges del'ouverture, said support force and surface contac ~ between the pin andthe edges of the opening being in the closed position, ~ s ~ n ~ lffi espour said closure prevents any air intake après30 dispensing, the insert consisting of a plate through which is (are) provided (s) ~ channel channels) and a support element which portela membrane and is secured to said tray carrier I'élément étantdisposé in the central zone of such tray.A ensemblc ensures distribution sans35 air intake by implementing the opening and closing a dispensing orifice by a pin operated by a membrane ~; , ','. ',' ;; ~; ~,,, ......, .... - .... ~ ........ .. - -..... .... ~ ... .. ... .... .. -. ~ 129 ~ 6 ~ -.. ..déformable We know that without air intake, the récipientssouples s 'crush the as distribution, which allows users to identify the fill level of the container even if laparoi is totally opaque. Moreover, the lack of recovery of air5 prevents deterioration of the product in during distribution oxydationet also prevents cont ~ RNIN ~ tion of the product in terms bactériend'où resulting in a possible reduction in the use of preservatives. However, such a known assembly requires pourfonctionner properly, accurate positioning of the spike PAR10 relative to the port, but unfortunately there is no provision in the ensembleselon FR-a-829,056 to facilitate this positioning, and présenteinvention aims to overcome this drawback, the present invention relates to a dedistribution product. pasty fluid consistency comprising un15 flexible material in a container containing the fluid to be dispensed anda dispensing head comprising a dome provided with at least one distribution orificede closable by a movable stud carried bya elastically deformable membrane, the orifice being closed by lepicot in the absence of any overpressure on the said membrane side où20 said stud is located and being freed when applying a surpressionsur said membrane on the side where said stud is located, the container and ledôme constituting a single piece obtained by molding, a rigideétant insert in place at the base of the dome and delimiting between itself and the dome, a space, said insert comprising at least one channel, which puts EN25 communicating said space and the container, and bearing in vis-a-vis del'orifice, the deformable membrane, the last ~ re giving the picotune bearing force against the edges of the opening, said appuiet forces the contact area between the pin and the edges of the opening being in position closing, sufficient for closing said empêche30 any air uptake after dispensing, the insert consisting of unplateau through which is ~ are) provided (s) the channel (channels) anda support member which carries the membrane and is integral duditplateau, the support element being arranged in the central area duplateau, characterized in ~ that is the plate comprises, in its partie35 facing the tube, a circular plate whose estpleine central zone and which is molded of one piece with an annular element ... ~ .... ~ ..... ~, ~ 2129 .... ... 3qui form AVEE the plate a cylindrical blind housing is fixed to the intérieurduquel the support member I'élément ring carrying at top sapartie a collar bearing against a cusp prévuà inside the dome at the junction between the skirt and the coupole.s Thus, with this arrangement, the insert is placed in place of specific ~ gr ~ ACON that the cusp, and therefore the pin is positioned demanière fairly accurately the orifice.Le récipien ~ is preferably constituted by a cylindrical skirt dontla tube, of circular or oval cross-section, is molded of unepièce with DBME and which is closed by a linear seal in the opposite Sazone d6me. Ad- ~ ageusement, the support element includes a jupecylindrique which fits with Ull squeezed light ~ ge in logementborgne and a base constituting the membrane. This limits levolume dead inside the dome. Pre ~ erence, the support element is surrounded by pluralityof channels arranged in a ring around him. The insert is, depréf ~ ence, consists of two separate parts assembled: according unmode particular realization, the plate has in its zonecentrale, a blind housing inside which is fixed the élémentsupport, the latter comprising a cylindrical area engaged in leditlogement and a base constituting the membrane. This mode of Realisationen two parts allows to obtain a set of greater rigiditéet to limit the problems of sealing between the insert and the wall dudôme, when the wall of the dome is deformed; Indeed, one can utiliserpour mold the bearing support member unmatériau the plastic elastic membrane more flexible than for molding the plate whereinis (are) provided (s) the channel (channels) .The pin and the edges of the hole are preferably desformes complementary such that the contact surface of the pin entrel'exké ~ and the opening edge is important. The orificede distributiorl advantageously comprises a tapered bearing, lepicot being shaped at its free end in a range of tronconiquesensiblement same vertex angle. The assembly includes avanl: ageusement a capuchonsusceptible cover the dome; the cap is fixed by interlocking, ~ '~ 12916 ~ snap or screw on the basis of the d ~ me The cap preferably comprises internally a nipple arranged in line with the dedistribution when the cap hole is fixed to the dome. in a fashion derealisation Rather, the distribution ends opening toward the exterior of the dome, by a truncated scope and the nipple is shaped at its free end with a frustoconical bearing substantially mêmeangle the apex of pref ~ ence, the two frustoconical bearing surfaces distribution del'orifice are separated from each other by a zonecylindrique. the cap and prevents any accidental distribution10 product during storage and operations different from m ~ dling, where pressure would exercéesur the container the various elements of the assembly be moulésen peuven ~ u ~ ilisant same thermoplastic material: in this case, is used, more particularly 15, the polyéthylane which has the advantage of being recyclable. Oll may nevertheless choose to élasticitésdirférelltes polyethylenes; for example, one can use a more polyethylene rigidepour the plate of the insert than to the support member. It preferen ~ nmoins the container dome assembly is molded in a different thermoplastic matériau20, including a multicouchethermosoudable material, this material has the advantage of unegrande air impermeability. The assembly according to the invention is simple to manufacture. Onmoule separately the different parts: the part formed by the non paroi25 closed container and dome, the two pieces forming the insert and, éveneuellement the cap. Assembling the two parts formantl'insert then pushes the insert into the container until it is inplace at the base of DORNE. We then introduced the product to distribute background speaks OPEN ~ the container and closes the open end of last CE30, including by heat. In the case where the container is a tube, is carried out preferably -Ime sensiblementperpendiculaire linear welding to the tube axis. Finally, there is, éventuellement9le cap on the dome. The assembly of the invention operates as follows façon35: during use, utili ~ ator removes the cap to expose the orifice formed on the dome; he then presses the walls '' 2 ~ 9 ~ side of the flexible container with his fingers. Under the pressure produced, the product contained in the récipisnt dansl'insert passes through the formed channel, and enters the space between the insert and the dome. Lapression exerted on the product by the fingers of the user de ~ elm la5 elastic membrane carrying the stud; this pieot, initially closed; distribution tl'orifice, moves in translation and frees dedistribution port; the product then exits through the dispensing orifice and perhaps applied. Simultaneously the container, which is flexible, écraseLorsque the user stops pressing on the container, the pression10 exerted by the product on the membrane ceases and the revientpar elastic membrane in its first position, the pin lockable to nouveauI'orifice distribution. The membrane quickly resuming its positionpremière and the pin in sealing engagement with the edge de1S the orifice, there is no air intake; therefore, product ladétérioration avoids distributing oxidation in air and sacont ~ min ~ tion by microorganisms in the air; we can therefore réduirel'utilisation of preservatives in the product to be dispensed. Deplus, the tube remains after distribution in its crushed form partiellement20: I'utilisateur can easily assess the amount of product remaining in the tube, m ~ me if it is opaque.Par It should also be noted that the space between lapièce inserted and the dome can be very low parrapport proportion to the volume of the container; the interior volume of the channels also est25 very small compared to the volume of the container; in cesconditions, the dead volume is low, the amount of product it contains nonexpulsable is low and the product of the refund rate is àdistribuer élevé.Pour better understanding of the object of the invention, in VA30 describe it -after, by way of purely illustrative and nonlimi ~ tif, a fashion r ~ realization shown in the accompanying drawing. In this drawing: - Figure 1 is an elevation in partielled'un cutting assembly according to the invention including its cap, avec35 pullout section - '2iL29 5- ~ the ~ lgure 2 is a partial axial section del entire distributed ~ ion of Figure 1 before distribution, capuchonétant clear dome - Figure 3 is a partial axial section view oF the dispenser assembly of Figure 1 during dispensing, the cap being removed - 4 shows, on a large scale, the area L lafigure 1 - 5 shows, in perspective, the deI'insert tray - 6 shows in perspective I'élément-supportde the insert.L all 1 dispenser shown in figures 1 to4 consists of a container formed by a tube 2 containing the product àdistribuer and a dispensing head formed with a 3 came dome demoulding with the tube 2 and by an insert 5 in which are formed descanaux 23, said insert carrying an elastic membrane 6 provided with unpicot 7. the insert 5 is arranged at the base of the dome 3. in the dome 3 estménagé an orifice 4. the dome 3 is covered by a cap 8 .The tube 2 is formed of a skirt cyl; ndrique 9 to pinch sonextrémité opposite the dome 3 by a linear weld 10. the dome 3is coaxial with the tube 2; it consists, firstly, of a jupecylindrique 11 of smaller diameter than the cylindrical skirt 9 of the tube

2, the skirt 11 being connected to the skirt 9 by a circular shoulder 12, and, secondly, by a dome 13 whose convexity is turned versI'extérieur. A cusp 3a is provided within the dome 3 to the jonctionentre the skirt 11 and the dome 13. A hole 4 is provided at the center beyond dome 13; the side walls of said hole 4 (see FIG 4) laforme have two frustoconical bearing surfaces 4a, 4b separated from each other bya cylindrique.L'insert S box consists of two assembled parts parembo1tage: a tray 14, wherein are provided four channels 23and a supporting element 15 carrying the membrane 6 provided with the pin 7. Leplateau 14 comprises, in its part facing the tube 2, a plaquecirculaire 16 which is provided with four openings forming the inlet 23 and whose descanaux the central area is full. The circular plate a2 ~ ~ L291; Sun diameter, the necessary clearance, the inner diameter of the lady jupecylindrique 11 3. The circular plate 16 is molded with an element unepièce nn ~ ~ ire 17 which, with the plate 16 unlogement cylindrical blind 14a. The annular element 17 carries, at SA5 upper portion, a collar 19 of external diameter equal to, the necessary clearance, to the diameter of the dome 3 below a ~ ui cusp 3a, lacollerette 19 bearing against the cusp 3a. Sontrégulièrement channels 23 arranged around the periphery of the annular element 17 etdébouchent one side in the plate 16 and the other in the collerette10 19. The supporting element 15 is constituted by the membrane 6portant at its center the pin 7, which constitutes a transversalecirculaire base and by a cylindrical skirt 20, which has a externeégal diameter than the inner diameter of the annular element 17 and has the même15 height, ~ ACON to be able to fit with a slight interference in the blind housing 14_ limited by the annular element 17 and the plate 16The stud 7 is disposed to the right of the orifice 4 provided in the dome axis

3 and the accuracy of the establishment of the insert 5 in the dome 3 grâceau cusp 3a sets the strength of the stud 7 cl'appui LES20 against edges of the opening 4. The pin 7 is circular and has its end a frustoconical bearing 7a complementary to the frustoconical surface 4_ del'orifice 4 so as to obtain a contact surface between the stud 7 etl'orifice 4 sufficient for the closure can be sealed to air.The cap 8 consists of a side skirt 21, which LE2S free edge bears on the shoulder 12, by fitting with a slight interference on the base of the dome 3 at the location of the skirt 5.La insert 21 is connected to a base 22 circular cross bearing Enson center, on its inside, a nipple 24 arranged in line with the hole

4 when the cap is fitted on the base of the dome 3; the pin 24 est30 comf ~ mé at its free extremity with a frustoconical bearing 24a substantially the same vertex angle as the tapered 4bde reach the hole 4. All selvn the invention is manufactured of façondécrite following: preparing separately molding four parts: 35 the assembly formed by the cylindrical skirt 9 of the tube 2 and the dome 3, lesdeux elements of the insert 5 (the plate 14 and the support element 15), and the '-' 21291 ~ i5capuchon 8. the tube 2 and the dome 3 are plastiquemulticouche heat sealable material, and the other polyethylene parts. Onassemble one with the other plate 14 and the supporting element 1 ~ eninsérant the skirt 20 in the lo ~ ly blind 14a, which is thus closed by

5 the elastic membrane 6. introduces the insert S thus assembled parl'extrémité open the tube 2 and drives it until the collerette19 abuts against the cusp 3a formed in the inner wall dudôme 3; the cusp 33 allows a precise positioning of the insert and, therefore, accurate positioning of the pin 7 relative to 10 the orifice 4. Further, the insert S comes stiffen the cylindrical skirt 11 of the dome and, therefore, the convex dome 13; this way, the distribution is significantly têtede ri ~ aegis. then fills the tube 2 USING the product P which is, for example, a sunscreen and oneffectue by heat sealing the linear weld 10 after pinch des15 walls of the skirt 9. The filling tube 2 is ef-fectué vacuo so as to avoid pollution of air in the remplissage.Lorsqu'il wants to use the product P, the user removes lecapuchon 8. He then presses the tube 2 with the fingers. Pcontenu the product in the tube 2 then passes through channels 23 in the space 2520 between the S insert and the dome 3. The pressure exerted by the fluid deforms the elastic membrane 6 which initially planar voirfigure ~ 1), becomes concave (see Figure 3). The pin 7 attached to elastic lamembrane 6, which closed the orifice 4 (see Figure 1) in déplacealors tlanslation and frees the orifice 4 of the dome 3 (see Figure 3): P le25 product is distributed through the orifice 4. when lltilisi ~ tor ceases to exert pressure on the tube 2, the elastic membrane 6 reprendpar elasticity its flat shape and pin 7 comes close port 4: product ladistribution stops. ~ has the elastic membrane 6 reprenantrapidement form, there is no air intake; moreover, the valve30 constituted by the stud 7 and the orifice 4 is perfectly airtight. Under these conditions, the tube 2 can not elastically resume sonvolume initial and crushed remains: it is therefore easy pourtili ~ eur assess ia amount of product P remaining in the tube 2. Deplus as there. no air intake, there is no risk DE35 pollution produced by air.