AP966A - Liquid-tight container and process for conditioning a liquid in said container. - Google Patents

Abstract

This leaktight container includes four superimposed sheets (1, 2, 3, 4). The sheet (1) includes a precut tab (5) welded (13) to a portion of the sheet (2) . A passage (10) is formed between these sheets (2) and (3) and acts as a valve between the inside and the outside of the leaktight container formed between the sheets (1, '4). A cut (9a) in the sheets (2, 3) allows the passage (10) to be placed in communication with the inside of the container formed between the sheets (I, 4). By pulling the tab (5) the wall of the passage (10) formed by the sheet (2) is torn and this passage is placed in communication with the outside.

Description

A LIQUID IN THIS CONTAINER

The present invention relates to a leaktight 5 container fitted with a valve which lies inside this container and is formed between two flexible sheets extending from one edge of the container to the other and joined together along two non-converging connection lines so that when the said flexible sheets are parted, a passage is delimited between them,

Leaktight bags fitted with a valve which lies inside the bag and is formed between two flexible sheets, passing through part of the bag are known, these sheets being joined together along two non15 converging lines so that when the said sheets are parted, a passage is formed between them, and being fixed in a leaktight way between the edges of the bag, except that end of the passage which is adjacent to the edge of the bag. This passage allows a fluid to pass between the inside and the outside of the bag, the flexible sheets being intended to be pressed one against the other as soon as a force for parting them is no longer applied to them, thus preventing the said fluid from coming out of the bag.

Such bags are known and have been described in

WO 95/23742, in FR 2 711 115 or in FR 1 338 549 in particular.

The passage forming the valve of these leaktight bags is normally open at both of its ends, which means that it offers the user no guarantee regarding use of this bag prior to its purchase. Aside from the fact that the purchaser therefore has no guarantee that the bag still contains the initially packaged amount of product, neither does he have any guarantee regarding the conditions of hygiene of the product thus packaged.

US-3 687 358 has already proposed an opening system intended to allow access to the inside of a bag which comprises, on the internal face of the wall of

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- 2 the bag, a weak layer fixed by its edge to this wall and at its centre. That part of the wall of the bag which is fixed to the weak layer is welded to this weak layer so that by pulling the tab the weak layer is broken and the bag can be opened.

WO 95/23742 proposes that the internal end of the passage of the valve be closed by an attached cap, thus requiring another component to be added to the packaging. Closing the internal end of the passage guarantees the hygiene of the product packaged in the bag, but not that of the passage itself.

This type of leaktight container with a valve in any case presents another kind of problem. To work effectively, the passage forming the valve between the two flexible sheets has to be long enough to provide an effective seal. In the solutions proposed hitherto, in which the external opening of the valve is formed by a fold or a join between one of the internal sheets and a wall of the bag, the length of the passage has been increased by orienting it at an angle to the major axis of the bag, which means that the length of this passage is greater than the length to which the flexible sheets extend into the bag. All the same, the size of the flexible sheets used is substantially greater than the width of the passage, which means that a significant amount of material is thus lost.

The inventors of the present invention have found a way to solve both problems simultaneously, by forming a passage which, like the sheets in which it is formed, extends from one edge of the leaktight container to the other, this making it possible to use sheets· whose width does not greatly exceed that of this passage.

A passage of this kind, although it allows optimum use of the sheets extending across the leaktight container while reaching a sufficient length, does not, however, communicate either with the inside or with the outside of the container and at this stage simply forms a space which is sealed hermetically both

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- 3 against the inside and against the outside of the container, unlike the oblique passage of the valves according to the state of the art.

A cut is made through at least one of the 5 sheets in which the passage is formed, between the nonconverging connection lines that delimit this passage, thus placing it in communication with the outside. This then gives a passage which communicates with the inside of the leaktight container but is inaccessible from the outside, thus affording all the desired guarantees of tamperproofing.

In order to allow the consumer to access the inside of this passage using a simple and practical means, a tab has been cut in the wall of the container, a portion of this tab being fixed to the adjacent sheet used to form the passage, between the two nonconverging connection lines at a point which is distant from the aforementioned cutout. The end of this tab is left free so that it can be grasped. A leaktight connection is formed around the tab, between the wall of the container and the adjacent sheet. By pulling on the free end of this tab, the sheet fixed to it is torn locally and thus access is had, not directly to the inside of the leaktight container, but to the inside of the valve passage, so that a drinking straw can be introduced into this passage which will allow the two walls of the passage to be parted and liquid to be withdrawn from the container.

In addition to optimum usage of the sheet material forming the valve, one of the objects of the present invention is optimum usage of the volume of the bag. In bags of the state of the art, the top of the bag is left open to allow for filling. The fill level cannot be very high in such cases otherwise the liquid overflows from the bag when the top edge is welded up. This means that the extent to which the liquid fills the bag is not very high. Of course it is possible to fill the bag through the passage of the valve, but liquid would remain in this passage, and this would not

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- 4 be acceptable as the passage has to remain perfectly clean until it is first used.

Advantageously, a second passage is formed between the said flexible sheets in which the passage of the valve is formed, this second passage having an outer end adjacent to one edge of the said container and the other end in communication with the inside of this container.

Another subject of this invention is a method 10 for packaging a liquid in a bag or a container including the said second passage, according to which method the bag together with the two passages is formed, at least the outer end of the said second passage adjacent to the edge of the said bag is left open, the said liquid is introduced through this second passage, and the said outer end of the second passage is sealed.

Finally, a subject of this invention is a use of the said leaktight container according to Claim 15.

Among the many advantages of the container which forms the subject of the present invention, the solution proposed does not add any additional components to the leaktight container as compared with the known solutions, the tab being formed by a portion of the wall of the container. This solution therefore does not lead to an increase in production costs. Furthermore, existing production lines can continue to be used with only very slight modifications affording an advantage which is not insignificant from the product standpoint.

The container is protected from any attempts at tampering. Hygienic conditions are perfectly guaranteed right up to the first time that the bag is used. The number of components forming the bag and the valve are reduced as far as possible, no attached element being needed to tamperproof the valve. The area of sheet needed to produce the passage and the fillable volume of the bag are optimized.

Other advantages will emerge from reading the

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- 5 description which follows, given with the aid of the appended drawing which illustrates, diagrammatically and by way of example, one embodiment and various alternative forms of the leaktight container which forms the subject of this invention.

Figure	1	is	an	elevation illustrating	the
various stages	in	the process for manufacturing this
leaktight container	•
Figure 2	is	a	plan	view on II-II of Figure 1.
Figure 3	is	a	plan	view on III-III of Figure	1.
Figure 4	is	a	plan	view on IV-IV of Figure 1.
Figure 5	is	a	plan	view on V-V of Figure 1.
Figure 6	is	a	plan	view on VI-VI of Figure 1.
Figure 7	is	a	plan	view on VII-VII of Figure	1.
Figure 8	is	a	section on VIII-VIII of Figure	7.
Figure 9	is	a	section on IX-IX of Figure 7.
Figures	10,	11 and	12 are perspective views	of
a leaktight bag :	illustrating three stages in its use.
Figures	13	to	15	are perspective views of	an

alternative form, illustrating three stages in its use.

Figures 16 to 19 illustrate various phases in the production of an alternative form of the container forming the subject of the invention.

	Figure 20	is a	part	elevation of	an
25	alternative form of the 1	manufacturing	process of Figure
	X · Figure 21 is	a	section	illustrating	the
	successive stages in	the	manufacturing process	of
	Figure 20, on a-a, b-b,	c-c,	d-d, e-e	and f-f.
30	Figure 1 illustrates	four endless strips 1,	2,

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3, 4 of monolayer or multilayer thermoplastic film, such as polystyrene, polypropylene, polyethylene or polyamide, which are used to manufacture the leaktight bag which is the subject of the invention. The strips 1 and 4, which are wider, are intended to form the walls of the bag, while the narrow strips 2 and 3 are used to produce the valve. As a preference, the thickness of the film of the strips 2 and 3, which is of the order of 40 pm, is less than that of the film of the strips 1

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- 6 10

and	4, which	is of the	order of 100 pm,	so	as to	make
the	strips 2	and 3 more	flexible, to make	it	easier	for
the	valve to	close .
	The	various operations in manufacturing	this
bag	progress	in line	on the strips 1	to	4 and	are

illustrated by Figures 2 to 7 in which the width of the bag is drawn in chain line.

The first operation is carried out on the sheet 1 and consists in precutting tabs 5 at regular spacings. Each tab 5 is intended to be situated close to one of the corners of the bag. The end of this tab 5 is cut out, while its parallel edges are precut in such a way that before use the tab 5 remains in the plane of the sheet 1.

The second operation (Fig. 3), consists in depositing a rectangle 6 of heat-resistant ink or lacquer on the sheet 2, at regular spacings, corresponding to the spacings between the tabs 5.

The third operation consists in welding the sheets 2 and 3 along two parallel lines 7 and 8 (Fig. 4), leaving a passage 10 between them, the flexible walls of which passage are normally touching, but can be moved apart, thus forming the valve which controls the dispensing of the packaged liquid. These welds 7 and 8 narrow . at the point where the heat-resistant lacquer 6 is situated. During the same operation, two parallel cuts 9 are made in the welds 7 and 8, and a transverse cut 9a connects the parallel cuts 9, thus placing the passage 10 in communication with the outside .

During the fourth operation (Fig. 5), the two strips 2 and 3 are welded to the strip 1 with a weld 11 which extends along the outer edge of the strips 2 and 3 and near to the adjacent edge of the strip 1. A weld 12 is also produced and this surrounds the long sides of the rectangle 6 of heat-resistant lacquer deposited on the sheet 2 and cuts across the width of this rectangle 6 so that the sheets 2 and 3 are not welded together a~ the location of the passage 10. A weld 13,

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- 7 in the shape of a rectangle, superimposed on the rectangle 6 of heat-resistant lacquer is also produced so that only the sheets 1 and 2 are welded together at the location of this rectangle 13.

Next, in the next stage, the strips 1, 2, .3 are covered with the fourth strip 4 and three welds 14a, 14b, 14c, forming three sides of the leaktight bag 15 are formed, one of them, 14b, along one of the edges of the strips 1 and 4, and the other two, 14a, 14c, transversely to these strips. The fourth side, adjacent to the other edge of the strips 1 and 4, remains open to allow subsequent filling of the leaktight bag 15.

The last step consists in detaching the leaktight bags from one another between two adjacent 15 welds 14a, 14c.

The leaktight bag 15 illustrated in Figure 7 is ready to receive the liquid to be packaged, after which the fourth side will be welded up, enclosing the liquid in a leaktight way.

The contents of such a bag cannot be consumed straight from the hermetically-sealed bag after the bag illustrated in Figure 7 has been filled. This is because there is no opening giving access to the inside of the leaktight bag, which means that this bag is guaranteed tamperproof and any tampering can be verified, and that hygienic packaging conditions are ensured insofar as there is no opening giving access to the inside of the bag.

Figures 10 to 12 show how it is possible to access the contents of the bag using a drinking straw or some sort of passage 17 allowing the liquid to pass from the inside to the outside. All that is required is for the tab 5 to be lifted and pulled towards the edge 14c of the bag 15. Given that the tab 5 is welded along the weld rectangle 13 to the strip 2 which forms one of the walls of the passage 10, by pulling it, this wall 2 is torn thus making an opening 16 in the passage 10. This opening 16 allows a tubular element 17 such as a drinking straw or pouring device to be inserted. This

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AP 00966 tubular element 17 has to be long enough to emerge from the cut end 9a of the passage 10, thus placing the contents of the leaktight bag in communication with the outside .

To interrupt this communication before all the liquid contained in the bag has been used up, all that is required is for the drinking straw 17 to be withdrawn so that its end becomes set back by a certain distance from the cut end 9a of the passage 10. As a preference, as illustrated in Figures 7 and 12, the start of the passage 10 has a sudden widening 10a intended to allow a folded-back end 17a of the drinking straw 17 to be housed and kept in place when one wishes to stop consuming the liquid. The end of the widening

10a also forms a stop for the end 17a of the drinking straw 17, preventing this drinking straw from being pushed so far into the passage 10 that it would open the valve formed by this passage 10. As can be seen in Figures 10 to 12, the edge of the tab 5 attached to the wall 1 of the leaktight bag 15 is adjacent to the weld

14c,	which means that this	weld limits	the	amount	by
which	the tab 5 can be pulled The alternative form	back. illustrated	by	Figures	13
to 15	consists in adding to	that part	of	the bag	15

which is fitted with the valve, a strip of a more rigid material, such as a strip of thicker material (of the order of 200-250 pm) 18, such as a thermoplastic film of the same type as that used for the sheets 1 to 4. This strip 18 has parallel score lines 19 which are obtained by compression. This strip 18 is fixed to the bag by welding it to the tab 5, itself welded around the rectangle 13 to the sheet 2, as illustrated in Figures 5 to 7.

By pulling on the strip 18, the tab 5 is pulled and the wall of the passage 10 is torn, thus opening the valve. The strip 18 is then detached from the tab 5, the weld between this strip 18 and this tab being chosen to offer lower resistance to pulling than the weld 13 between the tab 5 and the sheet 2. Once the

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- 9 strip 18 has been detached, it is bent along the score lines 19 to form a pipe which acts either as a drinking straw or as a pouring spout depending on the shape it has, and it is inserted into the opening 16 as before (Figure 15).

The alternative form illustrated by Figures 16 to 19 shows, in addition to the passage 10 which acts as a valve and as a pipe for dispensing the liquid packaged in the bag, a passage 20 intended only for filling the bag.

The operations in manufacturing the bag according to this alternative form are the same as those described in respect of the previous embodiment, which means that these operations will be described more briefly for this alternative form.

As before, the opening tab 5 is precut in the sheet 1 used to form one of the walls of the bag. In parallel, a layer of sparing lacquer 6 is deposited on one 2 of the sheets, the one intended to form the valve. As is visible in Figures 16 to 19, the layer of sparing lacquer 6 also extends over some 6a of the width of the weld 14a forming the perimeter of the bag, and over a certain length of this weld 14a, for the reason which will be explained later.

Next, the sheets 2 and 3 are welded along the line 7, 8 to form the passage 10, and the cut 9 is made to place this passage in communication with the inside of the bag. As far as the passage 20 is concerned, it is formed between the weld 8 and a weld 21 which extends along the inner edge of the sheets 1 and 2.

Once the passages 10 and 20 have been formed, the sheets 2 and 3 are joined to the sheet 1 using a weld 22 (Fig. 17) which has an opening 22a superimposed with the head 5a of the tab 5. This weld, as before, joins the rest of the tab 5 to the wall 1 of the bag, the sparing lacquer 6 preventing the two walls 2 and 3 from being welded together at the location of the passage 10 between them.

At this stage (Fig. 18) the sheet 4 is

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-10superimposed on the sheets 1, 2 and 3 and they are welded edge to edge to form the leaktight bag. During this operation, it is contrived for the' welding of the edge of the bag to be superimposed with the region 6a covered with sparing lacquer, which has the effect of leaving this part of the bag open.

The next operation consists in inserting a folded drinking straw 17 into the passage 10 and in inserting a filling lance 23 into the passage 20. Once filling is over, the ends of the passages 10 and 20 are sealed by welding the edge of the bag in that part of the width which has been left free by the sparing lacquer 6a as illustrated in Figure 19.

This ' bag can then be used like the bag described earlier, by tearing back the tab 5 giving access to the drinking straw 17 and to the dispensing passage 10.

Of course, it is also possible not to place a drinking straw in the passage 10, in which case the outer edge of this passage may be sealed when the edge of the bag is welded up and only that end of the second passage 20 which is adjacent to this edge left open.

Although the essential advantage of the present invention is associated with flexible-walled leaktight containers of the bag type, the invention could also be applied to other types of leaktight containers for packaging liquid. Of course the invention is not in any way limited to the fact that the membrane fixed against the inner face of the wall of the container consists of a strip passing across the length or width of the container, the use of a strip of this type is advantageous because it allows the container according to the invention to be produced continuously from materials in strip form. The entire surface area of the strip 34 need not necessarily be welded to the inner face of the wall 1 of the bag. In actual fact, all that is required is for it to be welded to the body 5b of the tab, and for the unwelded portion of the membrane adjacent to the holding end 5a of the tab 5 to be

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-11isolated from the inside of the bag by a leaktight connection so as to prevent the liquid being able to get out until that part of the membrane 34 which is welded to the body 5b of the tab 5 has been torn.

Figures 20 and 21 illustrate not only an alternative form of the method of Figures 1 to 7, but also an alternative form of the valve formed between the sheets 2 and 3 arranged between the sheets 1 and 4 forming the bag. In this alternative form, the sheet 1 has not been represented, but it is of course there.

The first operation carried out in Figure 20 is illustrated by section a-a of Figure 21 and corresponds to the weld 7', 8' delimiting the passage 10' of the valve. As may be seen, this passage does not have parallel edges, and the purposes and functions of the variations in cross-section thus given to the passage 10 will be explained later. A transverse weld 42 is formed close to one end of the passage 10' the utility of this weld will be explained later.

The next operation consists in making the cut

9' , 9'a intended to make this passage 10' communicate with the outside. This cut 9' has the shape of a U, the two arms of which are of unequal length. As can be seen, this lack of symmetry of the arms of the U-shaped cut 9' coincides with the lack of symmetry of the narrowing at the middle of the passage 10' . This lack of symmetry of the passage 10' and of the cut 9' has been shown to improve the sealing of the valve, that is to say of that part of the passage 10' which extends from the asymmetric narrowing of this passage and the cut 9', 9'a.

During the operation illustrated by the next section c-c, a drinking straw 17' is inserted into the passage 10' . The diameter of this drinking straw is such that it corresponds substantially to the narrowing formed at the entry of the passage 10'. This means that the drinking straw seals against the inlet end of the passage 10', which means that liquid which may have flowed between the passage 10' and the drinking straw

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-1217' during the opening of the valve is prevented from leaving this passage 10'. It may also be noted that the end of the drinking straw 17' inserted into the passage 10' has a bulge 17'a which prevents the drinking straw

17' from coming out of the passage 10', this bulge resting against the narrowing situated at the entry to

the passage	10' . Furthermore, the transverse	weld	42
limits	the	movement of the drinking straw 17'	in	the
passage	10' .
10	The	operation illustrated by section	d-d	is
carried	out	in parallel on the sheet 4 forming	one	of

the walls of the bag. It consists in cutting out the tab 5 .

Between the operation (c-c) of inserting the drinking straw 17', and the next operation d-d, the sheet 4 joins the other two sheets 2, 3 and a nonweldable sheet (not represented) is inserted between the drinking straw and the sheet 3 adjacent to the sheet 4. This means that the weld 40 made in operation e-e welds together only the sheets 3 and 4 and the opening 40a leaves the end 5a of the tab 5 free, the rest of this tab being welded to the sheet 4.

The last operation consists in making two spot welds 41 between the welds 7' , 8' forming the passage

10' and the wall 4 of the bag as well as two parallel weld lines 43, the spacing of which corresponds to that of the welds 7', 8' of the passage 10'. These welds 43 attach the valve formed by the passage 10' to the opposite edge of the sheets 2, 3 and 4. It 43 thus delimit [sic] the width of the housing accommodating the folded-over part of the drinking straw 17'. As for the spot welds 41, they prevent the sheets 2, 3 from following the drinking straw 17' when the bulge 17'a is brought up against the narrowing situated at the entry to the passage 10', allowing the valve to close.

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Claims (16)

1. Leaktight container fitted with a valve which lies inside this container and is formed between two flexible sheets (2, 3) extending from one edge of the

5 container to the other and joined together along two non-converging connection lines (7, 8) so that when the said flexible sheets (2, 3) are parted, a passage (10) is delimited between them, characterized in that the two non-converging connection lines (7, 8) extend from

10 one edge of the container to the other, a portion of one (2) of the said sheets, which lies between the two non-converging connection lines (7, 8) being fixed to a tab (5) cut in the adjacent wall (1) of the container and attached to this wall by one end, whereas the other

15 end is free so as to form a means for grasping, a leaktight connection between the sheet (2) and the adjacent wall (1) of the container extending right around the periphery of the said tab (5) , this tab being used to break the portion of the said sheet (2)

20 which is fixed to it, by pulling on its free end, in order to place the said passage (10) in communication with the outside, a cut (9a) being made through at least one of the said sheets (2, 3) between the said non-converging connection lines (7, 8), this cut being

25 distant from that portion of the sheet (5) which is fixed to the tab (5) and serving to place the said passage in communication with the inside of the said container.

2. Leaktight container according to Claim 1,

30 characterized in that the part of the said tab (5) attached to the wall (1) of the container is adjacent to a weld (14c, 33) joining together two walls (1, 4;

1, 34) of this container.

3. Leaktight container according to Claim 1,

35 characterized in that the passage (10) formed by the said connection lines (7, 8) has a widened part adjacent to the end of the passage, a wall portion of which is integral with the said tab (5) , this widened part serving to accommodate the folded-over end (17a)

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-14of a pipe (17) for dispensing a liquid packaged in the said container, the end of this widened part acting as a stop preventing this dispensing pipe from entering the said passage (10) by more than a given length.

5 4. Leaktight container . according to Claim 1, characterized in that a strip (18) of a material which is more rigid than the wails (1, 4) of the container is attached thereto and rendered integral with the outer face of the said tab (5) to allow the said passage (10)

10 to be opened when this strip (18) is detached from the said container.

5. Leaktight container according to Claim 4, characterized in that the said strip (18) of material has score lines (19) arranged so that after folding it

15 forms a pipe which can be inserted into the said passage (10) to open the valve and allow the liquid contained in the said container to pass through.

6. Leaktight container according to Claim 1, characterized in that the said non-converging

20 connection lines (7, 8) extend parallel to one edge of the bag, joining together two opposite edges (14a, 14c) .

7. Leaktight container according to Claim 1, characterized in that a second passage (20) is formed

25 between the said flexible sheets (2, 3) and has an outer end adjacent to one edge of the said container and the other end in communication with the inside of this container.

8. Container according to Claim 7, characterized

30 in that two of the respective ends of the said passages (10, 20) coincide with one edge of the said container and are adjacent to one another.

9· Leaktight container according to Claim 7, characterized in that the cross-section of the said

35 passage (10') close to its opposite end to the said cut (9'a) has a narrowing, the cross-section of which corresponds substantially to that of the said dispensing pipe (17').

10. Leaktight container according to Claim 9,

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-15characterized in that the said narrowing of the crosssection of the said passage (10') additionally constitutes a stop intended to interact with a corresponding stop (17'a) integral with the dispensing

5 pipe (17').

11. Leaktight container according to Claim 1, characterized in that the said two flexible sheets (2, 3) joined together along two non-converging lines (7, 8) are attached to one of the walls (1, 4) of this

10 containers [sic] at least at two points (41) located one on each side of the said passage (10, 10').

12. Method for packaging a liquid in the container according to Claim [9] Ί_, characterized in that the container together with the two passages (10, 20) is

15 formed, at least the outer end of the said second passage (20) adjacent to the edge of the said container is left open, the said liquid is introduced through this second passage (20) and the said outer end of the second passage (20) is sealed.

20 13. Method according to Claim 12, characterized in that when forming the said container, a layer of sparing lacquer (6a) is deposited between the edge of the said flexible sheets (2, 3) corresponding at least to the outer opening of the said second passage (20)

25 adjacent to the edge of the said container, the width of this layer (6a) being less than that of the weld (14a) forming the edge of the container, the edge of the container is welded up, reducing the width of this weld at the point corresponding to the opening of the

30 second passage (20) adjacent to the edge of the container to that of the said layer of sparing lacquer (6a) and superimposing this reduced-width weld therewith, the container is filled through this second passage (20) and a lateral weld adjacent to the said

35 layer of sparing varnish (6a) is formed between the two edges of the narrowing on the part of the width of the weld (14a) of the edge of the container left free by the layer of sparing lacquer (6a) at the location of the outer opening of the said second passage (20).

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-1614. Method according to one of Claims 12 and 13, characterized in that when forming the said container, a layer of sparing lacquer (6a) is deposited between the edge of the said flexible sheets (2, 3)

5 corresponding to the other end of the said first

passage (10) coinciding with one edge of the said container, away from the end where the said flexible sheets (2, 3) are cut (9) between the said non- converging lines (7, 8) , the width of this layer (6a) being less than that of the weld (14a) forming the edge

of the container, the edge of the container is welded up, reducing the width of this weld at the point corresponding to the said other end of the said first passage (10), to that of the said layer (6a) of sparing

15 lacquer and superimposing this reduced-width weld therewith, a tubular element (17) is inserted into this passage (10) and bent back so that it does not reach the point where the said sheets (2, 3) are cut between the said non-converging lines (7, 8), and a lateral

20 weld is formed adjacent to the said layer of sparing lacquer (6a).

15. Use of the said leaktight container according to one of Claims [5 and 9] 3 and 7, for packaging a liquid, characterized in that a removable pipe (17) for

25 dispensing the liquid packaged in the said container is introduced into the said passage (10), that part of this removable pipe which lies outside this passage being bent over, the end of this bent-over part (17a) being brought into abutment against the bottom of the

30 said widened part of the said passage (10) in order to prevent this dispensing pipe (17) from penetrating the said passage beyond a determined length.