EP1305229B1 - Fixing head for tubes - Google Patents

Abstract

A tube provided with a head and a skirt having an orthogonal cross section of particular shape in which the largest inscribed circle has a diameter D. The head, which is designed for fixing of a rigid closure, is provided with a circular cylindrical wall extending towards the inside of the tube and enclosing an orifice concentric to the inscribed circle and having a large diameter, typically more than 0.8D, and takes up substantially the internal volume of the skirt end over a height less than D, preferably less than D/3. The invention is further directed to a closure element, in particular a convenience closure, adapted for fixing substantially irreversibly on the tube head, comprising a base having an external outline matching the shape of the orthogonal cross section of the tube skirt, and a skirt having a diameter in the range of 0.5D to 0.9D.

Description

TECHNICAL AREA

The invention relates to certain flexible tubes for storing and dispensing liquid products of various viscosities, in the form of gels, creams or pastes, typically toothpaste or cosmetics. These tubes have a head that has neither neck nor shoulder, the skirt being directly adjacent to a rigid closure. Said rigid closure consists of either a endpiece provided with a cap or a hinge capsule, comprising a base and a cap that pivots around a hinge attached to the base and which allows to close a dispensing orifice disposed on said base.

STATE OF THE ART

Many documents disclose such tubes whose heads, not including neck or shoulder, has both a minimum footprint and an appearance original aesthetic.

Often, the end of the tube is directly equipped with a capsule-service. So No. 4,470,521 discloses a tube of elongate, elliptical or polygonal section, provided with a service capsule substantially in the extension of the skirt, the hinge being placed on the periphery in the area of the major axis and the orifice of distribution being placed as far as possible from said hinge. In addition to questionable comfort of use due to the impractical position of the hinge, this tube is molded in a single material, which does not allow to have a tube satisfying satisfactorily the constraints of use: the skirt must be very flexible to allow a good return of the product contained in the tube, but the hinge must be able to withstand the many mechanical stresses (mainly in bending, but also in torsion and in lengthening) imposed during the entire use of the distributor tube. Or a good resistance to fatigue is not obtained with the plastics more flexible (typically low density polyethylene) but with more rigid materials (typically polypropylene), which, moreover, are not melt-compatible with the softer materials of the skirt, such as polyethylene based density. Moreover, for the service capsules, the good Repetitiveness of the closure of the cap imposes to have a capsule in one rigid material. It is indeed necessary that the cap pivots about its axis such that the various elements called upon to cooperate with each other in order to the closing of the dispensing orifice and the temporary fastening of the cap on its base arrive repetitively exactly opposite each other. By making such a tube for injection molding of a single material, the man the trade is therefore condemned to a delicate compromise between two requirements contrary, which does not lead to obtaining satisfactory tubes.

US Patent 5 123 561 discloses a service capsule having a base provided with a skirt of large diameter, itself provided on its inner wall of substantially irreversible fastening means. The capsule-service is attached to a tube head which has a neck and a frustoconical shoulder. As a result, the assembly does not have a minimal bulk or an original aesthetic appearance.

We find in the French model 98 7300 published under the numbers 535 807 to 535 814 (L'Oréal) a tube having no neck or shoulder, which presents the times a minimum footprint and an original aesthetic appearance. The tube is elliptical, the capsule-service is located in the extension of the skirt but, unlike the tube of US 4,470,521, the hinge is placed in the zone the small axis which allows to better hold the tube in hand during the various manipulations of the cap. However, this tube presents the same problem than the previous one: if we do it by injection molding with a single material, the latter can only be a compromise between two requirements otherwise.

Injection molding with a single material does not lead to a solution satisfactory, the plaintiff sought to make the flexible material coexist of the skirt with the rigid material of a closure such as that represented by the French model 987300. Because it is not enough to solve the problem of merged compatibility. There is, in fact, also the problem of restitution of the tube thus produced: at the end of use of the tube, the user must try to expel the product that is located in the vicinity of the rigid plugging and can no longer squeeze the skirt as effectively as when the pressed is done in the middle of the skirt.

PROBLEM

The plaintiff therefore sought to manufacture under satisfactory economic a tube that has a weaker head clutter than conventional heads that have a shoulder and a neck, said tube allowing nevertheless to obtain with a rigid closure directly adjacent to a flexible skirt a restitution rate greater than 85%.

OBJECT OF THE INVENTION

The invention firstly relates to a tube provided with a head intended for fixing a closure, second object of the invention, described below and claimed in 10, and a cylindrical or prismatic skirt having a section orthogonal of any shape (elliptical, circular, polygonal, etc ...) whose largest inscribed circle has a diameter D, characterized in that the head is provided with a circular cylindrical wall extending towards the inside of the tube and surrounding an orifice concentric to said inscribed circle, said orifice - which we will call later "large diameter orifice" to simplify - having a diameter typically between 0.5 * D and 0.9 * D, and in that it occupies basically the interior volume of the end of the skirt over a height less than D, preferably less than D / 3.

Thus, the closure is not directly attached to the skirt but on a head of particular shape, very flattened, so as to present the most low possible. The closure is provided with a circular skirt whose diameter is equal to or slightly greater than that of the large diameter orifice of the head. To fix this clogging on the tube, the said cylindrical skirt is forcibly introduced. in the circular cylindrical wall surrounding the large diameter orifice until immobilization at the end of depression. The open end of the skirt capping is provided with means of sotidarisation substantially irreversible such a snap-on bead that releases elastically outwards as soon as it exceeds the lower end of the cylindrical wall surrounding the orifice.

In this way, a rigid and tight contact is established at the level of the orifice of large diameter. The head, made of a material compatible in fusion with the material of the skirt, is sufficiently flexible so that its peripheral part, which corresponds to the junction between the head and the skirt, may suffer significant deformations while the corresponding adjacent parts of the rigid plugging remain undeformed. Such deformability allows to obtain a good rate of refund despite the presence of rigid closure at near the end of the tube.

The area adjacent to the cylindrical wall that surrounds the large diameter orifice must be slightly deformable since the cylindrical wall must ensure in cooperation with the cylindrical skirt of the closure a double function: sealing and solidarization substantially irreversible. Said cylindrical wall must be sufficiently far from the deformable peripheral part of the tube so that the large deformations imposed at the level of this peripheral part lose their amplitude when transmitted to the level of the cylindrical wall that surrounds the large diameter orifice. It is why, the so-called large diameter orifice has a diameter limited to 90% of the diameter of the largest circle inscribed.

On the other hand, the cylindrical wall surrounding the large diameter orifice participates in the rigidity of the head. It is in this sense that the orifice must have a large diameter, typically greater than 0.5 times the diameter of the largest registered circle, knowing that it may be lower if another means is used to to stiffen said head, such as that described later in one embodiment particular where the head is equipped with bosses.

The head occupies the interior of the volume delimited by the end of the skirt on a low height. It thus has a small footprint. In this way, the amount of material to be molded, is reduced, which can have consequences economic advantages over the material cost and even the rates of production, when the head is molded and welded to the skirt simultaneously. Typically, the height of the circular cylindrical wall that surrounds the large diameter orifice is less than D and preferably D / 5.

Preferably, the head is further provided with a peripheral wall which extends on a low height, typically of the order of a millimeter, the skirt flexible tube with a slight shift inwards, so that the pavement thus formed allows the fitting of a peripheral skirt attached to the base of the rigid capping. The offset corresponding to the thickness of said peripheral skirt attached to the base of the rigid closure, a closure is obtained whose external contour exactly prolongs the cylindrical or prismatic shape of the skirt.

When the user wants to obtain the distribution of the product at the end of use of the tube, it imposes a pressed near the corking. This results in a strong deformation of the periphery of the tube, especially at the junction between the skirt and the head. This part is strongly deformed with regard to the part of the rigid plugging that is in its extension and such a gap deformation gives an impression of yawning unattractive. Thanks to sidewalk formed on the head and covered by the peripheral skirt of the closure rigid, said yawning is avoided because the differential deformation between clogging and tube results in a simple displacement of the sidewalk behind the peripheral skirt of the capping and not by creating a dark interstice separating the two pieces.

When the closure is a hinged capsule, said peripheral wall is advantageously provided with notches that can accommodate the dwellings of tensioning elements of the hinge. Indeed, to obtain a clutter as small as possible, the tensioning elements which have a thickness close to that of the peripheral skirt of the capsule must have their most possible bottom on said peripheral skirt, which has the consequence locally increasing the thickness of said peripheral skirt, to a level where it must slip on the peripheral wall of the head.

When the orthogonal section of the skirt is not a circle centered on the axis of the large diameter hole, the sidewalk, which has a section deduced by offset of a skirt thickness of the orthogonal section of said skirt, completes the system of solidarisation substantially irreversible capping on the tube also allowing locking in rotation of the closure around the axis of the large diameter orifice.

The head has an end wall that connects the circular cylindrical wall surrounding the large diameter orifice and the outer wall in offset extension of the skirt. To further improve the rate of restitution, said end wall has bosses entering the interior volume of the end of the skirt, each boss having a bottom wall whose slope is inclined by relative to the plane perpendicular to the axis of the orifice, which facilitates the flow product to converge towards the central hole. In a way, the wall of bottom of these bosses comes as a shoulder that leads the flow to the circular cylindrical wall. In order to limit clutter of the head, these bosses should not be too deep. They have a depth limited to D, preferably D / 3.

Each boss also has a side wall whose shape is deduced by offset from that of the skirt and that of the circular cylindrical wall surrounding the large diameter orifice. This lag must be as low as possible, typically less than D / 10, so as to minimize the amount of product likely to be trapped.

In addition to their advantageous effect on the restitution rate, these bosses allow also to have a stiffer head. On the one hand, the deformation gaps between skirt and capping are diminished so that the yawning effect is less apparent. On the other hand, these bosses better insulate the cylindrical wall circle surrounding the large diameter orifice in that the deformations are only weakly transmitted to said wall.

A preferred embodiment is the tube corresponding to the French model 987300: the tube has an elliptical skirt with an easier decor to read that on a circular skirt and clogging is a service capsule elliptical in the extension of the skirt which must be oriented relative to the decor of the elliptical skirt. To ensure proper orientation of the capsule-service at the time of its substantially irreversible fixation on the tube, the head is provided with a positioning finger oriented towards the inside of the tube, such as described in the French patent application FR-A-2 807 401. The orifice of large diameter (diameter between 0.5 and 0.9 times the small axis of the ellipse) is here crossed by arms and partially obstructed by a veil, the entire arm and sail supporting said positioning finger.

The veil is placed between the arms in an area straddling the main axis of so that it does not obstruct the small dispensing orifice, located in the area of the small axis. The bosses occupy the complementary part of the ellipse, consisting of two zones extending around the major axis, the bottom wall marry the shape of a shoulder, thereby improving the restitution rate of the tube thus produced.

A second object of the invention is the closure that can be fixed from substantially irreversible manner on the head of the tube according to the invention having a base whose outer contour marries the shape of the orthogonal section of the skirt of said tube and which is provided with a skirt - hereinafter referred to as a large-diameter skirt - characterized in that that this diameter is typically between 0.5 * D and 0.9 * D, D being the diameter of the largest circle inscribed in the outer contour of the base, said large-diameter skirt having a height less than D, preferably less than D / 3 and being provided on its external surface with fixing means substantially irreversible clogging on the tube head. This is for example a snap-on bead that elastically releases outwards as soon as that it exceeds the lower end of the cylindrical wall surrounding the orifice of large diameter of the tube head. To facilitate the centering of the skirt of large diameter in said circular cylindrical wall, the bead snap-fit preferably occupies the open end of the skirt of large diameter of the closure and has a frustoconical surface converge towards the inside of the tube.

By consistency with the problem posed, the closure is made of a material rigid and the base of the closure is flat to minimize clutter and weight of the upper part of the distributor tube constituted by the assembly of capping and flexible tube. However, such a fastening system, even if this a priori less economic interest, can be mounted on other types of closures, less rigid or having a more cumbersome.

The large-diameter skirt has a cylindrical portion of equal diameter or slightly larger than that of the large diameter orifice so that the contact between the large-diameter skirt and the circular cylindrical wall surrounding the large diameter orifice is perfectly sealed, even when that the skirt is strongly deformed in the vicinity of the head. To set the clogging on the tube, the said skirt is introduced by force into the cylindrical wall circle surrounding the large diameter orifice until immobilisation at the end driving.

As described above, the base of the closure is preferably also equipped with a peripheral skirt that is wrapped around the sidewalk of the tube head according to the invention. This skirt makes it possible to hide unsightly yawning due to deformation gaps between the flexible skirt and rigid closure. On the other hand, when the outer contour of the base is not not a circle centered on the axis of the large diameter skirt, this skirt device on the sidewalk also allows immobilisation in rotation of the closure relative to the tube.

Clogging can be a service capsule. The hinge around which rotates the cap is composed of at least one film hinge and at least one tensioning element. Preferably it comprises a central film hinge framed by two tensioning elements. To have a clutter too weaker than possible, the tensioning elements, which have a thickness close to that of the peripheral skirt of the capsule, must have their most possible bottom on said peripheral skirt, which has the consequence locally increasing the overall thickness of said peripheral skirt to arrange housing for collecting said tensioning elements when the cap is folded on the base.

The large diameter skirt belongs to the capping realized in principle in a rigid material. This skirt thus has a rigid behavior likely to pose some problems at the time of fixing in large capping rates on the tube head. To facilitate the sinking of said skirt in the circular cylindrical wall surrounding the large diameter orifice, the large-diameter skirt is provided with flexibility slots. These slots of flexibility can be quite extensive and form cavities facilitating the flow of the product to the large diameter orifice and thus to the orifice distribution, thereby improving the refund rate.

In a preferred mode, these flexibility slots are on the one hand Trapezoidal cavities widening downwards that facilitate the good positioning the large diameter skirt on the arms that go through the hole large diameter and on the other hand cavities which facilitate the flow of the produced towards the large diameter orifice.

La figure 1 illustre un tube distributeur selon l'invention avec un tube souple selon l'invention et un bouchage selon l'invention dont seule la base est représentée.

La figure 2 illustre en vue dessous le tube souple selon l'invention de la figure 1

La figure 3 illustre une vue panoramique du tube souple selon l'invention illustré en figures 1 et 2 et d'un bouchage selon l'invention, présenté par sa face inférieure et arrivant au regard de la tête du tube souple.

Finally another object of the invention is the dispensing tube obtained by assembling the flexible tube according to the invention and the plugging according to the invention.

FIG. 1 illustrates a dispenser tube according to the invention with a flexible tube according to the invention and a closure according to the invention of which only the base is represented.

FIG. 2 is a bottom view of the flexible tube according to the invention of FIG.

FIG. 3 illustrates a panoramic view of the flexible tube according to the invention illustrated in FIGS. 1 and 2 and of a closure according to the invention, presented by its lower face and arriving opposite the head of the flexible tube.

EXAMPLE (Figures 1, 2 and 3)

This example corresponds to a proposed solution to realize in acceptable economic conditions the distributor tube presented in the French model 98 7300 published under the numbers 535 807 to 535 814 by the L'Oréal company. It goes without saying that the flexible tube head and the skirt of fastening / sealing - said skirt of large diameter - developed in this example are not limited to the particular shapes of the model and can be adapted to many other types of distributor tubes.

The tube 1 is provided with a head 10 for attaching a service capsule 200 - of which only the base is shown in FIG. 1 - and an elliptical skirt 2 whose largest inscribed circle has a diameter D of 32 mm equal to the small axis of the ellipse. The head 10 is provided with a circular cylindrical wall 11 extending towards the inside of the tube to a height of 3.5 mm - about D / 9 - and surrounding an orifice 15 concentric to said inscribed circle. This orifice subsequently called "large diameter orifice" has a diameter of 27 mm.

The closure is a service capsule 200 whose base 21 is provided with a large-diameter skirt 22. To fix this closure on the tube, said large-diameter skirt is forced into the circular cylindrical wall 11 surrounding the orifice of large diameter 15 until immobilization at the end of depression. The open end of the large-diameter skirt 22 is provided with a snap-fitting bead 23 which resiliently releases outwards as soon as it projects beyond the lower end of the cylindrical wall 11 surrounding the large-diameter orifice. 15. In order to facilitate the centering of the large-diameter skirt 22 in the circular cylindrical wall 11, the snap-fitting bead 23 occupies the open end of the large diameter skirt of the closure and has a frustoconical surface 27 converging towards the inside. of the tube.

The head is made of high density polyethylene (HDPE), compatible material in fusion with the materials of the multilayer skirt of general structure: PE / EMA / EVOH / EMA / EP. It is flexible enough that its part peripheral, which corresponds to the junction between the head and the skirt, may suffer significant deformations while the adjacent parts of the capsule-service, which is made of polypropylene, are not distorted. Such deformability makes it possible to obtain a good restitution rate despite the presence of rigid plugging near the end of the tube.

The head 10 occupies essentially the interior volume of the end of the skirt to a height less than 10 mm. In this way, the amount of material to be molded is reduced, which makes it possible to increase production rates because the head is injection-molded and welded simultaneously to the skirt.

The head 10 is further provided with a peripheral wall 12 which extends to a small height, typically of the order of one millimeter, the skirt 2 of the flexible tube with a shift of 0.4 mm inwards. The pavement thus formed allows the fitting of a peripheral skirt 24 attached to the base 21 of the service capsule 200.

The wall of the peripheral skirt 24 is provided with notches 121 that can accommodate the housing 204 of the tensioning elements 203 of the hinge.

The head 10 has an end wall which connects the circular cylindrical wall 11 surrounding the large diameter orifice 15 and the outer wall 12 in an offset extension of the skirt 2. To further improve the rate of restitution, said end wall has bosses 13 entering the interior volume of the end of the skirt, each boss 13 having a bottom wall 14 which is a shoulder that conducts the flow to the large diameter orifice 15. The maximum depth of these bosses 13 is 10 mm.

Each boss 13 also has a side wall 16 whose shape is deduced by shift of the order of one millimeter from that of the skirt and that of the circular cylindrical wall surrounding the large diameter orifice.

To ensure a good orientation of the service capsule 200 at the time of its substantially irreversible fixation on the head 10 of the flexible tube 1, the head 10 is provided with a positioning finger 17 oriented towards the inside of the tube. The large diameter orifice 15 is traversed by arms 18 and 18 ' and partially obstructed by a web 19, the arm and sail assembly supporting said positioning finger 17, which has a face resting on a substantially diametrical plane, two cylindrical faces which surround said face and extend over an angle of at least 10 °, and a top face with a helical slope. These faces are respectively referenced 91, 92, 93 and 94 in FIG. 18 of the French patent application FR-A-2 807 401.

The web 19 is placed between the arms 18 and 18 ' in a zone straddling the major axis so that it does not obstruct the small dispensing orifice 25 situated in the region of the minor axis.

The large diameter skirt 22 has a cylindrical portion of diameter equal to or slightly greater than that of the large diameter orifice 15 so that the contact between the large diameter skirt 22 and the circular cylindrical wall 11 surrounding the orifice large diameter 15 is perfectly tight, even when the skirt is highly deformed in the vicinity of the head.

The large-diameter skirt is provided with flexible slots 26 . These flexibility slots can be quite large and form cavities facilitating the flow of product to the large diameter orifice 15 and thus to the dispensing orifice 25 , thereby improving the rate of return. In addition, some of these flexibility slots 26 are downwardly widening trapezoidal cavities that facilitate the proper positioning of the large diameter skirt 22 on arms 18 and 18 ' which pass through the large diameter orifice. 15 .

Such a tube has, for a product of average viscosity between 2800 and 4000 centipoise, a rate of refund greater than 90%.

ADVANTAGES

Discretion of the fixing head, invisible once the clogging is fixed.

Low weight of the head, so low amount of material to be injected and increased production rates when the head is injected molded simultaneously to its welding on the end of the skirt.

Good rate of return of the tube thus achieved despite the high rigidity of the closure.

NOMENCLATURE OF ILLUSTRATIONS OF FIGURES 1, 2 AND 3

1:

tube

2:

skirt

10:

head

11:

circular cylindrical wall surrounding the central orifice 15

12:

peripheral wall

121:

notches

13:

boss

14:

boss bottom wall

15:

large diameter orifice

16:

side wall

17:

positioning finger

18, 18 ':

arms

19:

sail

20:

capping / capsule

21:

based

22:

large diameter skirt

23:

substantially irreversible fastening means / snap-on bead

24:

peripheral skirt

25:

dispensing orifice

26:

slot of flexibility

27:

frustoconical outer surface

200:

service cap

201:

cap

202:

hinge film (hinge element)

203:

tensioning element (element of the hinge)

204:

housing for tensioning element

Claims (17)

1. Tube (1) fitted with a head (10) intended to fix capping (20) according to any of claims 10 to 17, and with a cylindrical or prismatic skirt (2) having an orthogonal section of any shape whose largest inscribed circle has a diameter D, characterized in that the head is provided with a circular cylindrical wall (11) extending towards the inside of the tube, surrounding an opening (15) concentric to said inscribed circle and having a diameter typically lying between 0.5*D and 0.9*D, and in that it essentially occupies the inner volume of the end of skirt (2) over a distance of less than D, preferably less than D/3.
2. Tube (1) according to claim 1 fitted with a head (10) intended to fix capping (20) according to claim 12, in which the head is also provided with a peripheral wall (12) which extends the skirt (2) of the flexible tube over a short distance, typically in the order of one millimetre, and is slightly recessed inwards over a distance corresponding to the thickness of the peripheral skirt (24) of the capping (20).
3. Tube (1) according to claim 2 fitted with a head (10) intended to fix a service-cap (20) according to claim 13, in which said peripheral wall (12) is provided with cavities (121) intended to receive housings (204) of extension parts (203) of the hinge (202 and 203).
4. Tube according to claim 2 or 3, characterized in that the orthogonal section of the skirt (2) is not a circle centred over the axis of the large-diameter-opening (15), so that the capping (20) is also locked in rotation when it reaches it end position.
5. Tube according to any of claims 1 to 4, in which the head (10) is fitted with an end wall comprising bosses (13) entering the inner volume of the end of the skirt (2), each boss (13) having a bottom wall (14) whose slope is inclined relative to the plane that is perpendicular to the axis of the opening.
6. Tube according to any of claims 1 to 5, in which said bosses (13) have a side wall (16) whose shape is deduced by staggering the shape of the skirt (2) and of the circular cylindrical wall (11) surrounding the large-diameter-opening (15), the stagger distance being less than D/10.
7. Tube according to any of claims 1 to 6, in which the lower part of the head (10) is fitted with a jutting part (17) oriented towards the inside of the tube.
8. Tube according to claim 7, in which the jutting part (17) is a positioning peg attached to a net (19) stretched between arms (18, 18a) crossing over the large-diameter-opening (15).
9. Tube according to any of claims 5 to 8, in which the section of the skirt (2) is an ellipse, the diameter of the large-diameter-opening (15) lies between 0.5 and 0.9 times the short axis of the ellipse, and in which the bosses (13) occupy the complementary parts of the ellipse formed by two zones extending around the long axis of the ellipse and have a side wall (16) deduced by inner displacement of the elliptic skirt (2) over a distance in the order of one millimetre and outer displacement of the circular cylindrical wall (11) surrounding the large-diameter-opening (15).
10. Capping (20), in particular a service-cap (20), able to be fixed in substantially irreversible manner to the head of the tube, according to any of claims 1 to 9, comprising a base (21) whose outer contour follows the shape of the orthogonal section of the skirt of said tube and which is fitted with a large-diameter-skirt (22), characterised in that said large diameter typically lies between 0.5*D and 0.9*D, D being the diameter of the largest circle inscribed in the outer contour of said base, said large-diameter-skirt having a height less than D, preferably less than D/3 and being provided on its external surface with substantially irreversible fixing means (23) to fix the capping (20, 200) to the head (10) of tube (1).
11. Capping according to claim 10, in which the large-diameter-skirt (22) has a cylindrical part whose diameter is equal to or slightly greater than the diameter of the large-diameter-opening (15) of the tube head and has an open end fitted with a click-fit rim (23) whose outer surface is of blunt cone shape (27).
12. Capping according to claim 10 or 11, in which the base (21) is fitted with a peripheral skirt intended to be inserted around the edge of the tube head according to any of claims 2 to 9.
13. Capping according to any of claims 10 to 12 characterised in that said capping is a hinged closure comprising a base (21) and a cap end (201) pivoting around a hinge (202 and 203), said hinge comprising at least one extension part (203), in which the attachment of the extension part on the base is fixed in a housing (204) arranged in the lower part of the peripheral skirt (24).
14. Capping according to any of claims 10 to 13 in which the large-diameter-skirt is provided with ease notches (26).
15. Capping according to claim 14, in which the ease notches (26) are firstly cavities of trapezoid shape widening towards the base which facilitate the proper positioning of the large-diameter-skirt (22) on the arms (18, 18a) crossing over the large-diameter-opening (15) of the tube head according to claims 8 and 9, and secondly are cavities which facilitate product flow towards the large-diameter-opening.
16. Caping according to any of claims 10 to 15 in which the peripheral contour of the base is an ellipse and in which the diameter of the large-diameter-skirt lies between 0.5 and 0.9 times the short axis of said ellipse.
17. Dispenser tube intended to store and dispense liquid products of varying viscosity in the form of gels, creams or pastes, characterized in that it is obtained by assembling the flexible tube according to any of claims 1 to 9 with the capping according to any of claims 10 to 16.

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