ITMI20150069U1 - DEVICE TO CONTAIN AND SUPPLY A FLUID SUBSTANCE - Google Patents

Description

Description

The present invention relates to a device for containing and dispensing a fluid substance according to the pre-characterizing part of the main claim.

Some currently known devices for containing and delivering a fluid substance provide a flexible bag with a neck, in which an "airless" type pump is sealed, by interposing a gasket element placed in the neck of the bag.

Patent application EP 2243557 illustrates a container of the type described above. The container comprises a ring nut in which a seat is provided for housing the neck of the flexible bag. The ring element is equipped at the top with a sheath element that carries the pump, and maintains contact between the gasket element, the neck of the bag and the pump.

Known containers generally have a reduced transverse dimension, often providing an external rigid body of elongated shape. With such known containers it is not easy to decorate or print text on the visible part of the side wall of the external rigid choir. The solution to this problem involves the use of external rigid bodies having a larger transverse dimension than those of conventional containers.

In order to more easily insert the flexible bag into an external rigid body with an enlarged transverse dimension, the neck of the external rigid body must also be widened. The neck of the bag, on the other hand, maintains a reduced conventional transversal dimension.

For mounting an "airless" type pump associated with a bag on an external rigid body with an enlarged transversal dimension, it is necessary to provide a ring nut element having a transversal dimension substantially equal to that of the neck of the external rigid body, in order to allow fixing.

With a ferrule element having such a transverse dimension, misalignments between the sheath element and the ferrule element often occur. These misalignments are such as to compromise the seal of the gasket, a seal which is crucial for the proper functioning of the system featuring an “airless” pump associated with a flexible bag.

Another problem encountered with sheath and ring elements having an enlarged transverse dimension concerns their mutual assembly. To ensure a good seal of the "airless" system, the sheath element must be mounted perfectly coaxial with the ring nut element. However, it happens that the sheath element, equipped with the pump, is assembled slightly offset from the ring element, thus compromising the seal between the pump and the neck of the bag.

During the assembly phase of these elements, it is therefore necessary to correctly arrange the sheath element on the ring element, which involves a significant waste of time.

Furthermore, a misalignment between the sheath element and the ring nut element can cause a misalignment between the pump and the seat in which it is housed, resulting in a probable fall of the gasket in the bag. This fall of the gasket element can also occur during normal use of the container, due to a deformation of the bag neck under the effect of the decompression operated by the pump inside the bag.

The object of the present invention is therefore to provide a device for containing and dispensing a fluid substance which ensures the seal of the airless pump during its use, whatever the transverse dimension of the container.

Another object of the invention is to provide a device for containing and dispensing a fluid substance which allows a sheath element carrying the pump to be mounted efficiently and quickly, whatever the transverse dimension of the sheath element itself.

These objects and others are achieved by realizing a device for containing and dispensing a fluid substance according to the technical teachings of the attached claims.

Further features and advantages will be evident starting from the description of a preferred but not exclusive embodiment of the device for containing and delivering a fluid substance, illustrated by way of example and therefore not limiting in the attached drawings, in which

Figure 1 is a schematic cross-sectional view of a preferred embodiment of the invention;

Figure 2 is an enlargement of the detail indicated by the circle A in Figure 1;

Figure 3 is a cross-sectional view of a second preferred embodiment of the invention;

Figure 4 is an enlargement of the detail indicated by the circle B in Figure 3.

A preferred embodiment of the device for containing and dispensing a fluid substance is illustrated in Figures 1 and 2. This device comprises:

- a bag 1 having a bottom wall 1A, and a flexible side wall 1B and a neck 2 comprising an end portion 2A having a flange 3 which extends transversely to the neck 2, the neck 2 delimiting an opening for access to the cavity of the bag 1 and for housing at least a portion of a body 4A of a pumping element 4,

- a ring nut 5 comprising a base body 5A having a seat 6 provided with a base wall 6A to house and support at least the flange 3 of the end portion 2A of the neck 2 of the bag 1.

The device according to the present invention is intended to be associated with a pumping element capable of creating a depression in the bag (with respect to atmospheric pressure) of between about 400 and 800 millibar, preferably about 600 millibar. In this pressure range the bag is completely deformed. Therefore, in the present context, by flexible walls it is meant walls which are completely deformed at the pressures indicated above.

Preferably, contrary to the bottom wall 1A and the side wall 1B of the bag 1, the neck 2 of the bag 1 and the flange 3 are rigid. By rigid we mean that they do not deform at the pressures indicated above. It is however possible that the neck 2 and the flange 3 are also flexible.

According to the invention, the fluid substance, suitable to be contained in the bag 1, can be of any type, but preferably it is a cream.

The pumping element 4 is of the "airless" type, and manually operated, to withdraw the fluid substance from the bag and feed it externally through a distribution stem 4B.

This pumping element 4 is already well known to those skilled in the art, and therefore will not be further described below.

The device according to the invention also comprises at least one sealing element 7 provided between the end portion 2A of the neck 2 of the bag 1 and a portion of the body 4A of the pumping element 4.

The sealing element 7 is provided at a first distance D1 from the base wall 6A of the seat 6 to house the end portion 2A of the neck 2 of the bag 1.

More precisely, the sealing element 7 has a median plane 7A between its upper surface 7B and its lower surface 7C (fig.

2). The distance D1 mentioned above represents the distance between the median plane 7A of the sealing element 7 and the base wall 6A of the seat 6 for housing the flange 3 of the neck 2 of the bag 1. It is obvious to the skilled in the art that for to obtain an optimal seal, the median plane 7A of the sealing element 7 and the base wall 6A of the seat 6 must be substantially parallel.

The device for containing and delivering a fluid substance also includes at least one sheath element 8 comprising the first connection means 8A suitable for connecting the pumping element 4 to the ring nut 5; and of the second connection means 8B adapted to:

- connect together the ring nut element 5 and the sheath element 8,

- keeping the end portion 2A of the neck 2 of the bag 1 stably constrained to the seat 6 to house the end portion 2A, and - keeping the sealing element 7 in contact with each other, the end portion 2A of the neck 2 of the bag 1 and a portion of the body 4A of the pumping element 4.

In the example shown in figures 1 and 2 the first connection means 8A comprise an internal protrusion suitable to be inserted in a corresponding groove 4C provided in the body 4A of the pumping element 4. But it is possible to provide a different arrangement. By way of example, the above connection means 8A can be of another type, and in any case conventional for the skilled in the art.

It is also noted that the sealing element 7 is kept in position on the body 4A of the pumping element 4 (more precisely on an upper portion of a suction element 9 associated with the body 4A of the pumping element 4) by means of an element of abutment 4D provided on the same body 4A of the pumping element 4 (figs.

1 and 2). But it is possible to provide a different arrangement, for example it is possible that the sealing element 7 is kept in position by interference against the body 4A of the pumping element 4.

Advantageously, the sheath element 8 has, at a lower surface, a lower seat 8C for housing an upper edge 2B of the end portion 2A of the neck 2 of the bag 1. The lower seat 8C, in the illustrated example, comprises a groove against which the upper edge 2B of the neck 2 of the bag 1 comes into contact. More precisely, the position of use of the lower seat 8C is such that when the device according to the invention is assembled, the lower seat 8C compresses the upper edge 2B and the whole end portion 2A of the neck 2 of the bag 1 against the seat 6 provided in the ring nut 5. Therefore, the end portion 2A of the neck 2 of the bag 1 is kept stably in the seat 6.

It should be noted that the ring nut 5 has connecting means 5B adapted to cooperate with the second connecting means 8B of the sheath element 8 for the mutual connection of the two aforementioned elements, the connecting means and counter means 8B, 5B providing at least one coupling surface S having a second distance D2 to the base wall 6A of the seat 6 to house the end portion 2A of the neck 2 of the bag 1 (Fig. 2).

It is obvious to those skilled in the art that for a simple and effective connection between the ring nut 5 and the sheath element 8, it is preferable that the coupling surface S mentioned above is parallel to the base wall 6A of the seat 6 , in order to prevent accidental disconnection of the two elements mentioned above during the use of the device.

In the example illustrated in Figures 1 and 2, the second connection means 8B comprise a toothing provided with a striking surface, while the counter connecting means 5B comprise a counter toothing provided with a counter surface. Once the toothing 8B and the counter-toothing 5B are mutually connected, the abutment surface and the counter-abutment surface meet each other, thus forming the coupling surface S mentioned above.

It is obviously possible to provide other types of connection means 8B and counter connection means 5B adapted to mutually connect the sheath element 8 and the ring element 5, such as a screw means and a corresponding thread.

In the case of toothing 8B and counter-toothing 5B, it is preferable that they are arranged coaxial and at a substantially constant distance to the seat 6 to house the end portion 2A of the neck 2 of the bag 1. By way of example illustrated, the means and connecting means 8B, 5B can comprise a plurality of toothings and counter-toothings regularly distributed around the seat 6 above, and located one in front of the other.

According to the present invention, the second distance D2 to the base wall 6A of the seat 6 for housing the end portion 2A of the neck 2 of the bag 1 is greater than or equal to the first distance D1 to the base wall 6A of the seat 6 to house the end portion 2A of the neck 2 of the bag 1, in such a way as to limit any misalignments between the sheath element 8 and the ring nut 5 which would compromise the tightness of said sealing element.

According to a first embodiment of the invention, illustrated in Figures 1 and 2, the distances D1, D2 to the base wall 6A of the seat 6 to house the end portion 2A of the neck 2 of the bag 1 are substantially the same.

By substantially equal, it is meant that the difference between the first distance D1 and the second distance D2 is not greater than 1 mm.

According to an advantageous aspect of the invention, it is preferable that the ring element 5 has a guide element 5D which extends from the base body 5A, and has at least one guide wall 5E, the sheath element 8 comprising at least one counter guiding element 8D having at least one guiding counter wall 8E adapted to slide along a face of said guiding wall 5E when the sheath element 8 is connected to the ring nut 5.

It is preferable that the guide wall 5E of the ring nut 5 develops substantially parallel to the symmetry axis of the seat 6 to house the end portion 2A of the neck 2 of the bag 1, and at a substantially constant distance from the same seat 6 .

Advantageously, the guiding wall 5E and the guiding counter wall 8E are substantially tubular.

In the example shown in fig. 1 the guide wall 8E, or more precisely its external surface, of the sheath element 8 faces the internal surface of the guide wall 5E of the ring nut 5. It is possible to provide that it is the internal surface of the counter guide wall 8E which faces the outer surface of the guide wall 5E.

The guiding wall 5E and the guiding counter wall 8E make it possible to ensure the coaxial alignment of the sheath element 8 with the ring nut 5. It follows that during the assembly phase, the operator only has to put down the element sheath 8 inside the guide wall 5E, and then connect the sheath element 8 when it has been guided in a coaxial position with the ring nut 5.

According to an advantageous aspect of the invention, the pumping element 4 is provided with a suction element 9 placed inside the bag 1, the suction element 9 forming an abutment seat 10 for the sealing element 7, located at the inside of the neck 2 of the bag 1, designed to prevent the sealing element 7 from falling into the bag 1.

In particular, the abutment seat 10 preferably extends perpendicularly to the body 4A of the pumping element 4, to which the suction element 9 is associated, in a conventional way for the skilled in the art.

In the example illustrated in Figure 1, the suction element 9 has a lateral surface 9A whose thickness is substantially equal to the distance that separates the external surface of the body 4A of the pumping element 4 from the internal surface of the neck 2 of the bag 1. In in this case, the abutment seat 10 is obtained by means of a recess in the upper end portion of the side wall 9A of the suction element 9.

It is obviously possible to provide that the suction element 9 has a side wall 9A of conventional thickness, and from which a protruding element extends, such as a flange or a collar.

As can be seen in Figure 1, when the sealing element 7 is normally positioned in the end portion 2A of the neck 2 of the bag 1, it does not rest on the abutment seat 10. The latter is provided to prevent the element of gasket 7 falls into bag 1 and to keep it in the position of use inside the neck 2 of bag 1.

Preferably the device for containing and delivering a fluid substance comprises a dispensing cap 11 connected to the distribution stem 4B of the pumping element 4, the dispensing cap 11 comprising:

- an upper wall 11A, e

- at least one side skirt 11B extending from the upper wall 11A, and having an internal surface having a transversal dimension greater than or equal to the transversal dimension of the ring element 5 and of the sheath element 8, the side skirt 11B having such a length to cover the ring nut 5 and the sheath element 8.

Thus, the lateral mantle 11B has an external surface suitable for the application of decorations or the printing of texts, for example.

Advantageously, the transversal dimension of the lateral casing 11B is substantially equal to the transversal dimension of the ring element 5, so that the lateral casing 11B slides along and is guided by the external surface of the ring element 5.

Preferably, the dispensing cap 11 has a substantially hollow, cylindrical body, open at a lower end, preferably having a cross section in the shape of a regular polygon, and even more preferably in the shape of a circle.

The dispensing cap 11 has, in its internal part and preferably in correspondence with its upper wall 11A, a tubular offshoot 11C connected to a channel which flows into a dispensing mouth, not shown. The tubular offshoot 11C is adapted to be associated, in a conventional manner for the person skilled in the art, to a feeding mouth 4E, which is preferably part of the dispensing stem 4B of the dispensing member 4.

Preferably, the dispensing cap 11 has in its internal part an internal guide wall 11D adapted to cooperate with a guide wall of the sheath element 8.

It is preferable that the aforementioned guiding counter wall, for guiding the internal guiding wall 11D of the dispensing cap 11, is the same guiding counter wall 8E previously described, against which the guiding wall 5E of the ring nut element slides during assembly.

In the device illustrated by way of example in fig. 1, the external surface of the internal guide wall 11D slides along the internal surface of the guide wall 8E, while the external surface of the guide wall 8E is placed facing and almost in contact with the internal surface of the guide wall 5E.

It is obviously possible to provide that both the internal surface of the internal guide wall 11D slides along the external surface of the counter guide wall 8E, while the internal surface of the latter wall faces and is almost in contact with the external surface of the wall. guide 5E.

Alternatively, it is also possible that the sheath element 8 is provided with a second guide wall, specifically designed to guide the internal guide wall 11D of the dispensing cap 11.

In a conventional way for the person skilled in the art, the dispensing cap 11 is movable between at least a first dispensing operating position in which there is dispensing of the substance contained in the bag 1, and a second operating rest position in which there is no dispensing. of the fluid substance contained in the bag 1 (fig. 1).

The device according to the invention is suitable for being mounted in a container which, as illustrated in fig. 1, comprises an external rigid body 12 provided with a bottom 12A from which at least one side wall 12B extends, and able to house the bag 1 in its internal cavity. The external rigid body 12 also comprises a neck 12C, provided on an edge free of the side wall 12B and provided with fixing means 12D able to cooperate with counter fixing means 5F provided on a side wall 5G of the ring nut 5.

In the context of the invention, by container is meant any type of container suitable for containing the fluid substance. The material in which the bottle is made is for example plastic or glass. The container is preferably a glass bottle.

In the illustrated example, the fastening means 12D and the counter fastening means 5F respectively comprise a thread and a corresponding counter thread. Of course they can be different.

The operation of the invention is obvious to those skilled in the art based on the foregoing description, and in particular it is the following.

First of all, the sealing element 7 and the suction element 9 are associated with the pumping element 4. The latter is then connected to the sheath element 8 by means of the first connection means 8A, which are snapped into the corresponding groove 4C of the body 4A of the pumping element 4.

The neck 2 of the bag 1 is also associated with the seat 6 of the ring element 5 so that the flange 3 of the end portion 2A of the neck 2 rests on the base wall 6A. The assembly comprising the bag 1 and the ring nut 5 is then fixed to the external rigid body 12 by means of the fastening means 12D provided on the neck 12C of the external rigid body 12 and the counter fastening means 5F provided on the side wall 5G of the ring nut 5.

The bag 1, inserted in the internal cavity of the external rigid body 12, is filled with the fluid substance to be dispensed.

Subsequently, the sheath element 8 is assembled, associated with the pumping member 4, and the ring nut 5, fixed to the external rigid body 12. The sheath element 8 is placed on the ring nut 5 in so that the pumping element 4 is inserted in the neck 2 of the bag 1.

The guiding counter wall 8E slides along the inner face of the guiding wall 5E of the ring nut 5, and the sheath element 8 is aligned and coaxial with the ring nut 5, ready to be snap-assembled with the ring nut 5.

The sheath and ring elements 8, 5 are associated by simply pressing on the sheath element 8 so as to snap together the second connection means 8B of the sheath element 8 and the counter connecting means 5B of the element ring nut 5.

The dispensing cap 11 is subsequently associated with the pumping element 4, by inserting the tubular offshoot 11C of the cap in the feeding mouth 4E provided in the delivery stem 4B of the pumping element 4.

Upon completion of the assembly of the container, the end user can take a dose of fluid by pressing on the dispensing cap 11 in order to bring it from its second rest position to its first dispensing position.

A second embodiment of the invention is illustrated in Figures 3 and 4, in which the elements in common with the first embodiment are indicated with the same number, to which an apex is added.

According to the second embodiment, the second distance D2 ', between the connecting surface S' of the connecting means 8'B and the counter connecting means 5'B on one side, and the base wall 6'A of the seat to house the end portion 2'A of the neck 2 'of the bag 1' from another part, it is greater than the first distance D1 'between the median plane 7'A of the sealing element 7' and the base wall 6 'A of the seat for housing the end portion 2'A of the neck of the bag 1'.

Advantageously, according to the second embodiment, the counter connecting means 5'B of the ring nut element 5 'are provided on the face of the guide wall 5'E of the ring nut element 5' against which the guide counter wall slides 8'E, and the connecting means 8'B of the sheath element 8 'are provided on the surface of the guide counter wall 8'E of the sheath element 8' which slides against the aforementioned face of the guide wall 5'E .

Consequently, the guiding wall 5'E of the ferrule element 5 'and the guiding counter-wall 8'E of the sheath element 8' also serve to connect the ferrule element 5 'and the element sheath 8 '.

In this second embodiment, the connecting means 8'B and the counter-connecting means 5'B are respectively a toothing and a counter-toothing made protruding, respectively, from the external surface of the guide counter wall 8'E of the element a sheath 8 ', and from the inner surface of the guide wall 5'E of the ring nut 5' (Figures 3 and 4). Obviously, if the guide of the sheath element 8 ', during its assembly with the ring nut element 5', is performed by sliding the internal surface of the guide counter wall 8 'E against the external surface of the guide wall 5'E of the ring nut element 5 ', then the toothing and the counter-toothing are located respectively on the internal surface of the guide wall 8'E of the sheath element 8', and on the external surface of the guide wall 5 ' And of the ring nut 5 '.

The toothing and the counter-toothing are entirely similar, respectively, to the toothing and the counter-toothing of the first embodiment, and in particular they respectively comprise a surface and a counter surface suitable to form the coupling surface S 'mentioned above.

The difference between the first and second distance D1 ', D2' can be of the order of several centimeters, for example between 1 and 10 centimeters approximately.

Claims (14)

CLAIMS 1) Device to contain and dispense a substance, including: - a bag (1, 1 ') having a bottom wall (1A, 1'A), and a flexible side wall (1B, 1'B) and a neck (2, 2') comprising an end portion (2A , 2'A) having a flange (3, 3 ') which extends transversely to said neck (2, 2'), said neck (2, 2 ') delimiting an opening for accessing the bag cavity (1, 1 ') and to house at least a portion of a body (4A, 4'A) of a pumping element (4, 4'), - a ring nut element (5, 5 ') comprising a base body (5A, 5'A) having a seat (6, 6') provided with a base wall (6A, 6'A) to house and support at least said flange (3, 3 ') of the neck (2, 2') of the bag (1, 1 '), said pumping element (4, 4 ') being of the "airless" type and manually operated, to withdraw the fluid substance from the bag (1, 1') and feed it to the outside through a dispensing stem (4B, 4'B ), at least one sealing element (7, 7 ') being provided between said end portion (2A, 2'A) of the neck (2, 2') of the bag (1, 1 '), said sealing element (7 , 7 ') being provided at a first distance (D1, D1') from said base wall (6A, 6'A) of the seat (6, 6'A) to house said end portion (2A, 2'A) of the neck (2, 2 ') of the bag (1, 1'), and at least one sheath element (8, 8 ') comprising first connection means (8A, 8'A) suitable for connecting said pumping element (4, 4') to said ring element (5, 5 '), and second means of connection (8B, 8B) suitable for: - connect said ring element (5, 5 ') and said sheath element (8, 8') together, - maintain said end portion (2A, 2'A) of the neck (2, 2 ') of the bag ( 1, 1 ') stably fixed to the seat (6, 6') to house said end portion (2A, 2'A), and to - keeping said sealing element (7, 7 '), said end portion (2A, 2'A) of the neck (2, 2') of the bag (1, 1 ') and a portion of the body ( 4A, 4'A) of the pumping element (4, 4 '), said ring nut element (5, 5 ') having counter connection means (5B, 5'B) able to cooperate with said second connection means (8B, 8'B) of the sheath element (8, 8') for the reciprocal connection of said two elements (5, 5 ', 8, 8'), said means and connecting means (8B, 8'B, 5B, 5'B) providing at least one coupling surface (S, S ' ) having a second distance (D2, D2 ') to the base wall (6A, 6'A) of the seat (6, 6') to house said end portion (2A, 2'A) of the neck (2, 2 ') ) of the bag (1, 1 '), characterized by the fact that said second distance (D2, D2 ') to the base wall (6A, 6'A) of the seat (6, 6') to house said end portion (2A, 2'A) of the neck (2, 2 ') of the bag (1, 1 ') is greater than or substantially equal to said first distance (D1, D1') to said base wall (6A, 6'A) of the seat (6, 6 ') to house said end portion (2A , 2'A) of the neck (2, 2 ') of the bag (1, 1'), so as to limit any misalignments between said sheath element (8, 8 ') and ring nut element (5, 5') which they would compromise the tightness of said gasket element (7, 7 '). 2) Device according to claim 1 characterized in that said ring nut element (5, 5 ') has a guide element (5D, 5'D) which departs from said base body (5A, 5'A), and having at least one guiding wall (5E, 5'E), the sheath element (8, 8 ') comprising at least one guiding counter element (8D, 8'D) having at least one guiding counter wall (8E, 8 'E) able to slide along one face of said guide wall (5E, 5'E) when said sheath element (8, 8') is connected to said ring nut (5, 5 '). 3) Device according to claim 2 characterized in that when said second distance (D2 ') to said base wall (6'A) the seat (6') to house said end portion (2'A) of the neck (2 ') of the bag (1') is greater than said first distance (D1 '), the counter connecting means (5'B) of the ring element (5') are provided on the face of the guide wall (5'E ) of the ring nut element (5 ') against which the guiding counter wall (8'E) slides, and the connecting means (8'B) of said sheath element (8') are provided on the surface of said counter wall guide (8'E) of said sheath element (8 ') which slides against said guide wall (5'E). 4) Device according to one of the preceding claims, characterized in that said pumping element (4, 4 ') is provided with a suction element (9, 9') placed inside said bag (1, 1 '), said suction element (9, 9 ') forming an abutment seat (10, 10') for said sealing element (7, 7 '), located inside said neck (2, 2') of the bag (1, 1 '), designed to prevent the sealing element (7, 7') from falling into the bag (1, 1 '). 5) Device according to one of the preceding claims characterized in that it comprises a dispensing cap (11, 11 ') connected to said dispensing stem (4B, 4'B) of the pumping element (4, 4'), said dispensing cap (11, 11 ') including: - an upper wall (11A, 11A), e - at least one side skirt (11B, 11'B) which extends from said upper wall (11A, 11'A), presenting an internal surface having a transversal dimension greater than or equal to the transversal dimension of said ring element (5, 5 ' ) and of said sheath element (8, 8 '), said side skirt (11B, 11'B) having a length such as to cover said ring element (5, 5') and said sheath element (8, 8 ' ). 6) Device according to one of the preceding claims, characterized in that said second connecting means (8B, 8'B) comprise a toothing provided with an abutment surface, and that said counter connecting means (5B, 5'B) comprise a counter-toothing provided with a counter-abutment surface, said abutment surface and said counter-abutment surface being mutually abutment when said toothing (8B, 8'B) and said counter-toothing (5B, 5'B) are connected to each other , forming said coupling surface (S, S '). 7) Device according to claim 6, characterized in that said toothing (8B, 8'B) and said counter-toothing (5B, 5'B) are arranged coaxial and at a substantially constant distance from said seat (6, 6 ') to housing said end portion (2A, 2'A) of the neck (2, 2 ') of the bag (1, 1'). 8) Container according to one of the claims 2 to 7, characterized in that said guide wall (5E, 5'E) of the ring element (5, 5 ') develops substantially parallel to the symmetry axis of said seat ( 6, 6 ') to house said end portion (2A, 2'A) of the neck (2, 2') of the bag (1, 1 '), and at a substantially constant distance from the same seat (6, 6'). 9) Device according to one of claims 2 to 8, characterized in that said guide wall (5E, 5'E) and said guide wall (8E, 8'E) are substantially tubular. 10) Device according to one of claims 2 to 9, characterized in that the external surface of said guide wall (8E, 8'E) faces the internal surface of said guide wall (5E, 5'E). 11) Device according to one of claims 2 to 9, characterized in that the internal surface of said guide wall (8E, 8'E) faces the external surface of said guide wall (5E, 5'E). 12) Device according to one of claims 4 to 11, characterized in that when said sealing element (7, 7 ') is normally positioned in said end portion (2A, 2'A) of the neck (2, 2') of the bag (1, 1 '), is not resting on said abutment seat (10, 10'). 13) Device according to one of claims 5 to 12, characterized in that said dispensing cap (11, 11 ') has a substantially hollow, cylindrical body, open at a lower end, preferably having a cross section in the form of a regular polygon, and even more preferably in the form of a circle. 14) Container comprising a rigid body (12, 12 ') and a device according to one of the preceding claims, said external rigid body (12, 12') comprising a bottom (12A, 12'A) from which at least one side wall extends (12B, 12'B), and able to house in its internal cavity said bag (1, 1 '), a neck (12C, 12'C) provided on a free edge of said side wall (12B, 12'B) and provided with fixing means (12D, 12'D) adapted to cooperate with counter fixing means (5F, 5'F) provided on said ring nut (5, 5 '), in which said ring element (5, 5 ') is fixed to said neck (12C, 12'C) and said bag (1, 1') is housed inside said internal cavity of said external rigid body (12, 12 ').