EP1317224A1

EP1317224A1 - Bag for packaging substances comprising an integrated cannula and strip formed with same

Info

Publication number: EP1317224A1
Application number: EP01972152A
Authority: EP
Inventors: Pascal Lecointe
Original assignee: Eurl Packins
Current assignee: EURL PIG'INS
Priority date: 2000-09-13
Filing date: 2001-09-12
Publication date: 2003-06-11
Anticipated expiration: 2021-09-12
Also published as: FR2813784B1; EP1317224B1; WO2002022044A1; FR2813784A1; ES2263658T3; US20030163110A1; AU2001291943A1; ATE324084T1; DE60119136D1; DK1317224T3; DE60119136T2; US7150734B2

Abstract

A packaging bag for a liquid biological substance such as animal semen, including two walls made of plastic material joined in such a manner as to delimit a pouch for receiving the substance and, communicating with the pouch, an evacuation conduit whose end part, in the absence of opening of the bag, is closed by the joined walls, wherein, force-fitted in the conduit, a cannula being able to communicate with the pouch is provided, while a second end of the cannula is situated in the proximity of the end part of the conduit having a conical or substantially conical constriction, and wherein conduit communicates, over a part of its length, with at least one zone situated not far from the end part, in which the two walls are not joined.

Description

PACKAGING PACKAGING OF INTEGRATED ACANULATED SUBSTANCE AND BAND CONSISTING OF SUCH BAGS

The present invention relates to a sachet for packaging a liquid biological substance, such as animal semen.

It also relates to a strip formed by a juxtaposition of such sachets. For the storage of animal semen, especially swine, several types of packaging have so far been proposed.

Thus, there are flexible plastic tubes which, when filled with semen and closed, have a shape reminiscent of that of a large tube of toothpaste. They include a dispensing nozzle which is connected to the body of the tube by an area of circular cross section and of large diameter.

Such packaging essentially has two drawbacks. The first lies in the fact that it occupies a significant thickness due to the area of circular section. The second arises from the fact that the tip is closed during non-use, so it must be cut to be able to access the semen and carry out an artificial insemination. This requires that the inseminator has at his disposal a sharp object such as a pair of scissors. However, the current trend is to try to work as quickly as possible and with a minimum of objects other than a bag and a probe, so as to limit the risks of loss of such objects and the incidents they could be caused. To provoke. Relatively flat packaging bags are also known, formed by joining two sheets of plastic material. To these sachets is attached a plastic part which includes a dispensing tip. These sachets occupy less space than the tubes described above, but they nevertheless require an additional utensil for opening the end piece. The existence of these problems explains that a widespread packaging is a sachet formed exclusively from two adjoining plastic walls, so as to delimit a pocket for receiving said substance and, communicating with this pocket, a drainage conduit, the part of which terminal is, in the absence of opening of the bag, closed by said adjoining walls. A pre-cut located in the vicinity of the duct, a peelable area or an additional means makes it possible to open the emptying duct without having to use an additional tool. For artificial insemination, a probe formed from a tube is connected to this sachet, one end of which carries a massive foam or spiral-shaped pad.

A first possibility consists in directly connecting the probe to the bag, by inserting the end of the tube opposite the buffer, in the conduit.

This requires a certain dexterity, since the sachet filled with seed has no rigidity. It is soft and difficult to handle.

In addition, there are several types of probes, with different outside tube diameters. It is therefore also necessary to provide different sachets, with dimensions of conduits adapted to the probes, at the risk of seeing the semen flow between the conduit and the probe.

However, by looking for dimensions of the duct that are perfectly suited to those of the probe, there is a risk of piercing the bag when the probe is introduced, the end of the latter most often having a sharp edge. In addition, when the inseminated animals are free to move, the risks of disconnection of the sachet are significant.

A second possibility is to connect a connecting pipe (called a fitting) to the conduit, then connect the second end of the fitting to the probe. This connection constitutes an additional part which the inseminator must have within reach and which he is likely to lose.

Such a part is in principle for single use, but it has been found that the same connection could be used for several successive inseminations. However, it is common to observe seed spikes up to the connector or the bag, during an insemination. If the sow has a vaginal or uterine infection, the traces of semen left in the hose are likely to contaminate the semen contained in a sachet used for subsequent insemination. This is not acceptable from a health standpoint.

Document GB-A-2 003 449 describes a bag, in particular for the storage of blood platelets. In the various embodiments described, this bag includes a pocket which communicates with the outside via protruding tubes. In the unopened state, each tubing is located inside a closed compartment and is thus isolated from the outside. The compartment closing means consist of a peripheral peelable weld which is located at a distance from the tubing. To connect the tubing to a filling or emptying means, the two sheets which constitute the compartment to destroy the peelable weld. The tubing is then completely accessible, so that its entire length can be subject to pollution. Furthermore, the connection of a tube or a pipe to such tubing is rather difficult. In fact, the latter is retained in the bag only at one of its ends, so that the tubing / bag assembly does not really have any strength and rigidity, which complicates its connection to a tube or pipe. .

The present invention aims to overcome these drawbacks.

In other words, it aims to provide a packaging bag which can be connected to an insemination probe without the risk of tearing the plastic material of the bag during this operation.

It also aims to allow this task to be carried out in good conditions, that is to say without risk of disconnection of said probe.

The present invention also aims to provide a sachet which can be adapted to probe tubes of different diameters, under easy handling conditions, and with a probability of pollution of the product packaged in the sachet, reduced to a minimum.

When the technique of using an intermediate connector is desired, the present invention aims, while achieving the objectives mentioned above, to make the single use of said connector compulsory. In addition, the invention aims to achieve all of these objectives using simple and inexpensive means.

As specified above, the packaging sachet which is the subject of the invention is formed by two plastic walls placed side by side so as to delimit a bag for receiving the substance and, communicating with this bag, an emptying duct the end part of which is , in the absence of opening of the bag, closed by said adjoining walls.

This sachet is essentially remarkable for the fact that it comprises, force-fitted into the conduit, a cannula whose two ends are open, its first end being able to communicate with said pocket, while its second end, located in the vicinity of the terminal part of the conduit has a narrowing in section, of frustoconical or approximately frustoconical shape. It is also remarkable by the fact that said conduit communicates, over a fraction of its length, with at least one zone located not far from the terminal part, in which the two walls are not joined. By the expression "force-fitted" is meant, throughout this description and the claims, that the respective diameters of the conduit and the cannula are such that when the latter is in place, there is a perfect seal between these two elements. In other words, the substance contained in the bag cannot flow between the conduit and the cannula.

Thus, after having opened the conduit at its terminal part, we will then have access to the second end of the cannula. Being a part which has a rigidity necessarily greater than that of the plastic material of the bag, its connection to a probe will be able to be done in good conditions, without risk of tearing the plastic material of the bag. The cannula being inserted into the conduit, the latter is in a way "trapped", so that its connection to the probe is thereby facilitated. In addition, having a tapered section of narrowing, such a cannula can adapt to different internal diameters of probe tubes.

Furthermore, the presence of at least one zone in which the walls of the bag are not joined together will facilitate access to the end of the cannula, since the plastic material which initially covered it will be able to be removed.

However, the cannula remains protected and retained by the plastic material of the conduit over a good part of its length. It is thus protected from external pollution. In addition, the cannula is integral with the bag, which gives it overall rigidity, which makes it even easier to connect a probe tube.

Finally, because the probe tube is not directly inserted into the pocket, there is no risk of contamination from one to the other.

Furthermore, according to other advantageous but non-limiting characteristics of the invention: - said second end of the cannula abuts or substantially abuts against the end portion of the conduit;

- Said cannula is formed from a rigid or semi-rigid material;

- The bag has two zones in which the walls are not joined, these being distributed on either side of the conduit and facing each other;

- Said cannula has a length greater than that of said conduit, so that it extends in or in the direction of said pocket;

- Said cannula is able to slide in said duct, so that as a result of the opening of the duct and of a traction operated on the second end of the cannula, it can be partially extracted by bringing its first end in the vicinity of the duct or inside thereof; - The pocket comprises a pair of partitions formed of zones in which the two walls are joined, which are interrupted in the vicinity of said conduit and which constitute means for guiding the cannula during its partial extraction; - Said partitions consist of aligned sections, separated two by two;

- Said partitions each delimit a compartment in the pocket, these compartments communicating with each other only when the cannula is partially extracted; the conduit is extended by a channel, the conduit + channel assembly receiving the cannula and extending next to the pocket, said pocket communicates with said conduit by a conduit and, in the absence of extraction of the cannula, the latter closes said conduit, thus preventing the substance from flowing out of the pocket;

- The assembly formed by said duct and channel extends parallel to the long sides of the pocket;

- The bag includes means for opening the terminal part of the conduit, these means consisting in particular of a peelable area;

- The narrowing of the frustoconical section separates two portions of the cannula in which their section is circular and constant, the one closest to the terminal part of the conduit having a reduced diameter.

Another aspect of the invention relates to a strip of sachets for packaging liquid biological substance, which consists of a juxtaposition of sachets as described above.

Other characteristics and advantages of the invention will appear on reading the detailed description which follows of certain embodiments. This description will be made with reference to the accompanying drawings in which:

- Figure 1 is a top view of a packaging bag according to the invention, according to a first embodiment; - Figure 2 is a partial top view of the lower part of a bag substantially similar to that of Figure 1, and more specifically of the area where it comprises a drain conduit;

- Figure 3 is a partial view similar to that of Figure 2, intended to illustrate the mode of cooperation of the cannula with an insemination probe after opening of the terminal part of the conduit; - Figures 4 and 5 are top views of a second embodiment of the bag, the cannula is however not shown in Figure 4;

- Figure 6 is a view intended to illustrate how the bag of Figures 4 and 5 is used; - Figures 7 and 8 are also top views of two additional embodiments of the bag of the invention;

- Figure 9 is a view of the lower part of the bag of Figure 1, in a slightly different embodiment;

- Figure 10 is a top view of an additional embodiment of the bag. ;

- Figure 11 is a top view of an alternative embodiment of the cannula;

- Figure 12 is a simplified side view, in partial section, of the lower part of a variant of the bag of the invention, after the plastic material has broken, by applying a force to it.

The liquid biological substance packaging sachet shown in FIG. 1 is more particularly intended to receive animal semen, in particular porcine.

Its general structure is of known type. In this case, it is formed of two plastic walls 10 and 11, of elongated rectangular outline. It is a transparent or translucent plastic material, such as polyethylene, polyamide or polyethylene terephthalate (PET).

The two walls may consist of two separate sheets or of a single sheet folded back on itself. Each sheet can be mono- or multilayer.

The walls are placed side by side to delimit in particular a pocket P for receiving the substance.

In the example shown here, the walls are joined by welding. However, in another embodiment, they could be by another technique, in particular by gluing.

These techniques are well known to those skilled in the art and are not, strictly speaking, part of the invention.

The areas in which the two walls are joined bear the general reference 12 and are identified by black dots in the drawings. In the example shown here, the zones 12 comprise two large studs 120 which have a generally rectangular shape. They are willing symmetrically on either side of the longitudinal median axis of the bag, their long sides extending parallel to the short sides 14 of the bag. Between them extends an unwelded zone which bears the reference numeral 13 and which constitutes an opening for filling the bag P with semen. In a central area of the studs 120 are provided circular openings 2 suitable in particular for allowing the bag to be hung on a support, for example with a view to filling it.

Below the opening 13 and inside the pocket extend, in the vicinity of the studs 120, two pairs of circular welded pads 30, arranged symmetrically on either side of the longitudinal median axis of the bag. These pellets are intended to guide towards the inside of the pocket a nozzle not shown, suitable for being introduced through the opening 13 and serving in particular for filling with seed.

The two zones 120 are each connected to a weld line 121 of small width which extends in the vicinity and parallel to the long sides 15 of the bag. The lines 121 are connected, in the lower part of the bag, to large studs 122, each registering in a substantially rectangular shape and communicating with each other, in the lower part, by a narrow welded bead 123, in the longitudinal longitudinal axis. Between the two studs 122 extend non-welded surfaces. The first is connected to the pocket P and is interrupted by the aforementioned zone 123.

It is located in the axis of the bag and constitutes an emptying duct 3 for the bag P. This is a perfectly known structure.

Secondly extend in the lower part of the conduit 3, on either side thereof and at right angles, two surfaces or zones 5 in which, also, the walls are not joined.

Here they have a substantially triangular shape.

The respective functions of these zones will be explained later.

Inside the conduit 3 is inserted a cannula 4, preferably made of rigid or semi-rigid plastic. It is open at its two ends, its first end 41 communicating with the pocket P. Its second end 40, located in the vicinity of the terminal part 30 of the conduit 3, has a narrowing in section which gives it a frustoconical or substantially frustoconical shape. This terminal part has a pointed shape which constitutes an extension of the zones 5. It therefore has a width less than that of the conduit 3. The diameter of the cannula, excluding the end portion, is chosen in a size such that it can be forced into the interior of the conduit via the pocket P. Thus, there is no space between the cannula and the conduit, so that the seed cannot flow between them. If necessary, the cannula can be made to adhere to the plastic material of the conduit, for example by thermofusion over a few millimeters.

The end 40 of the cannula abuts against the converging edges of the terminal part 30, thus constituting a seal against liquids.

In the embodiment of Figures 2 to 8, the zones 5 are rectangular or square.

A still different embodiment of the conduit is shown in Figure 10. In this drawing, the two sides of the conduit have been shown in dissimilar embodiments. They could, of course, be identical. In any event, the walls of the conduit are not contiguous to that of the cannula over its entire length, but only in certain areas. These areas are sufficient to ensure lateral wedging of the cannula. Note however that the walls of the conduit 3 are substantially contiguous with that of the cannula, in its end portion 41 facing the pocket. This is essential so that the semen does not flow between the conduit and the cannula. It will be noted that the sachet has, at one of the zones 122, and parallel to the short sides 14, a cutout 6. This cutout is interrupted near the terminal part of the conduit 3, in the immediate vicinity of one of the areas 5. It delimits a tongue L of lower grip.

The bag 1 shown in Figure 1 shows its condition before it is filled with seed.

The filling technique is of known type and relatively conventional. This essentially consists in introducing a nozzle into the opening 13 as far as the interior of the pocket and making the semen flow through the nozzle. This operation can be carried out manually or be mechanized. When the bag is filled with seed, the opening 13 is then closed, in particular by hot welding. Thus, the pocket is closed hermetically.

The diameter of the cannula is chosen so that as soon as the bag is filled, the seed flows into it. This allows for better priming of the seed flow during insemination We will now explain how the bag is opened in order to carry out an artificial insemination.

The tongue L delimited by the cutout 6 is grasped and a traction is directed directed parallel to the short sides of the bag 14. This has the effect of tearing the plastic material along the line shown in dotted lines in FIG. 2.

Thus, the frustoconical end of the cannula is released, by tearing and releasing the plastic material which covered it.

In a different embodiment, it is possible to dispense with the cutout 6 and the tongue L. This will be described more precisely with reference to FIG. 12.

Insofar as the cannula is bordered by two non-contiguous zones

5, it is possible to release and raise the plastic tab 100 which initially covered the end of the cannula. We referenced by the letter N the folds that form the plastic at the level of zones 5, and which facilitate the release of the tongue.

It is then possible to place an insemination probe at the end of the cannula.

The length of the cannula is provided so that the operator can take it in hand. Thus, for a sachet with a total length of 25 cm, the cannula can measure approximately 3.5 cm, or a ratio of cannula / sachet length, of the order of 0.14.

A simplified embodiment of such a probe is shown in Figure 3. It comprises a tube 70 of semi-rigid plastic, with at one of its ends, a pad 71 of foam material.

The probe is connected to the cannula by its end opposite the foam pad. This connection is easily made thanks to the particular shape of the end of the cannula, namely frustoconical.

This shape makes it possible to adapt different sizes of probe tubes, to the extent, of course, where these have an inside diameter of the tube less than or equal to the outside diameter of the cannula at its widest part.

This connection operation is done in a simple and easy manner insofar as the cannula has a rigidity much greater than the plastic material which constitutes the sachet. The connection is made without risk that the probe does not disconnect, because the plastic material covering the end of the cannula could be released thanks to the presence of zones 5. Finally, the fact that the tube of the probe does not have to be introduced inside the bag, the risks of piercing mentioned above no longer exist. Therefore, we can afford to reduce the thickness of the walls 10 and 11. Thus, for example, this thickness can be reduced from 90 micrometers to 60 micrometers. The bag of Figures 4 and 5 has the same general physiognomy as that of Figure 1. However, unlike the latter, its conduit 3 no longer extends along the longitudinal median axis of the bag.

On the contrary, it is offset on the side thereof, in the vicinity and parallel to one of its long sides 15. The pocket P communicates with the conduit through an opening 9 arranged in one of its lower angles.

The conduit 3 is extended by a straight channel 8 which extends parallel to the long sides 15. The pocket is separated from the channel by a partition

124 longitudinal where the two walls 10 and 11 are joined. This partition is interrupted to constitute the opening 9 for communication of the pocket P with the conduit 3.

In this end part, the partition 124 has an extra thickness 126 with a curved profile 125. The function will be explained below.

In the same way, the weld line facing the outside of the bag also has at this level an extra thickness 126. In the upper part of the bag, the channel 8 has a flared shape which makes it communicate towards the outside through an opening 81 .

Outside the opening 81, the channel has a width greater than that of the conduit 3.

The bag of FIG. 5 differs from that of FIG. 4 by the fact that a cannula 4 ′ is represented inside the assembly constituted by the conduit 3 and its extension forming channel 8.

This cannula 4 'has an end 40' with narrowing of frustoconical section. As in the previous embodiment, this end is located in the vicinity of the lower end portion of the conduit 3. At the opposite end 41 ', the cannula 4' has a flare.

After introduction of the cannula through the opening 81 described above, the latter is closed by making a weld referenced S in FIG. 5.

The bag is used as described below. After opening the sachet according to the same method as that presented with reference to Figures 1 to 3, the end of the cannula is grasped so as to partially extract it from the sachet. The relative dimensions of the cannula and the channel 8 will of course have been chosen so that this sliding takes place relatively easily.

The direction of extraction of the cannula out of the bag is symbolized by the arrow f in FIG. 6.

The crossing of the zone where the excess thicknesses 126 are present will be by force.

In any event, the flared end of the cannula abuts against the end of the duct which communicates with the opening 9. It cannot therefore be completely extracted from the bag.

The end 40 'of the cannula 4' can then be connected to an insemination probe 7. This cannula then acts as a connection similar to those used hitherto in the form of independent parts.

However, due to the fact that it is integrated inside the bag, it is ensured that its use is unique. This reduces the risk of disease transmission from one animal to another.

The insemination is carried out by flow of the seed by gravity inside the cannula 4 'via the opening 9. The seed flow has been identified by the arrows g in FIG. 6. The fact that the walls of the channel have extra thicknesses 126 prevent the seed from going back up inside it by capillarity phenomenon.

At the end of insemination and in order to avoid repression of semen inside the bag P, the cannula 4 'can be made to slide in the opposite direction to the arrow f so as to bring its end 41' in abutment against the extra thicknesses 126, the opening will thus be closed.

In this embodiment, the cannula 4 'therefore has, in addition to its intrinsic advantages, also those linked to the use of a connector.

In the embodiment of Figure 7, the conduit 3 and the channel have an inverted position relative to that which they occupy in the previous embodiment. This means that the duct is opened by the small side 14 of the pocket which also allows it to be filled.

This allows to clear a large welded area 127 in the lower part of the bag. According to an embodiment not shown, the area can be reduced to a minimum, the free space being able to be occupied by the pocket. This makes it possible in particular to reduce its width and to save plastic material. In the embodiment of Figure 8, the cannula 4 'extends inside the pocket, along the longitudinal median axis of the bag. It is bordered by a series of sections T in which the walls 10 and 11 are joined. Each series forms a fractional C partition. The sections constitute guide means during the partial extraction of the cannula.

In an embodiment not shown, the partitions could each consist of a single unbroken line, in which the walls are joined. In any event, they have an interruption in the vicinity of the conduit 3, so as to allow the semen contained in the sachet to flow through the cannula.

Finally, the bag of Figure 8 is used in a manner substantially similar to that of Figures 4 to 6. In Figure 10 is shown yet another embodiment of the bag according to the invention. This sachet has a physiognomy close to that described with reference to FIG. 8.

Here, the partitions C which "frame" the cannula extend towards the upper outside of the bag to form a "bridge" C which surrounds its end 41 '. On either side of this bridge are formed access openings 13 to two compartments of the pocket Pi and P ₂ separated by the cannula 4 'and its associated partitions. The partitions each have an interruption for emptying the compartments. These interruptions are offset in height.

These compartments can communicate only when the cannula is partially extracted from the sachet, that is to say when its end 41 ′ is located in the vicinity of the conduit 3.

In Figure 11 is shown an additional embodiment of the cannula. The narrowing of section 44, of frustoconical shape, here frames two portions 42 and 43 in which they have a circular and uniform section. The portion 43 has a diameter smaller than that of the portion 42. It is intended to be turned towards the terminal part of the conduit 3 of the bag. When a probe is connected to the cannula at the level of the zone 44, the portion 43 is then engaged in the tube of the probe. The fact that the diameter is reduced allows a slow flow of the probe, conducive to better quality insemination. In the example shown here, the upper part of the portion 42 is flared so as to allow it to be blocked in translation in the conduit 3. As indicated above, in the embodiment of Figure 12, the bag has neither cutout 6, nor tab L.

Here, the bag is opened by breaking the plastic material, at the level of the lower end of the cannula 4. More precisely, by a force f applied at the level of the zone 123, in a direction generally perpendicular to the plane of the bag, one causes the rupture R of one of the two plastic sheets which composes the sachet, this at the level of the end 40 of the cannula. This phenomenon is explained by the fact that by applying such a force, the plastic material of the wall 10 is forced to come into contact with the peripheral edge of the end 40. The plastic material being stretched, because welded to a large part of its surface, there is then a rupture thereof, which realizes the opening of the bag at the second end of the cannula.

This opening can be achieved while the operator holds the bag in one hand, and manipulates the plastic with his second hand. However, an experienced person can both hold the bag and open it with one hand.

This cannula therefore has an additional function, namely that of constituting a tearing tool.

The opening maneuver will be further facilitated if the plastic used is not very rigid but capable of being "broken". A PET / Polyethylene complex is perfectly suitable, these two materials respectively constituting the exterior and interior sides of each wall.

In the examples described here, the contiguous zones 5 result from the absence of welding between the two plastic sheets which constitute the sachet. In an embodiment not shown, it is conceivable to treat the sheets so that they have a "peelable" weld line which cuts the conduit 3 at right angles. By "peelable weld" is meant a weld which still allows the two sheets to be separated from one another without affecting their integrity. Thus, by placing the cannula 4 in the conduit 3, the sheets are forced to separate locally in the region of the peelable weld, so that the non-contiguous zones 5 are then formed.

Claims

1. Sachet for packaging a liquid biological substance (S), such as animal semen, which is formed of two walls (10, 11) of plastic material joined so as to delimit a pocket (P) for receiving said substance (S) and, communicating with this pocket, an emptying duct (3), the end portion (30) of which is, in the absence of opening of the bag, closed by said adjoining walls, characterized in that it comprises, force fitted into said conduit (3), a cannula (4, 4 ') whose two ends are open, its first end (41, 41') being able to communicate with said pocket (P), while its second end (40, 40 '), located in the vicinity of the terminal part (30) of the conduit (3), has a narrowing in section, of frustoconical or approximately frustoconical shape, and that said conduit (3) communicates, over a fraction of its length, with at least one zone (5) located not far from the terminal part ( 30), in which the two walls (10, 11) are not joined.

2. Bag according to claim 1, characterized in that said second end (40, 40 ') of the cannula (4, 4') abuts or substantially abuts against the end portion (30) of the conduit (3) .

3. Bag according to claim 1 or 2, characterized in that said cannula (4, 4 ') is formed from a rigid or semi-rigid material.

4. Bag according to one of claims 1 to 3, characterized in that it comprises two zones (5) in which the walls are not joined, these being distributed on either side of the conduit (3 ) and facing each other.

5. Bag according to one of the preceding claims, characterized in that said cannula (4 ') has a length greater than that of said conduit (3), so that it extends partly in or in the direction of said pocket (P).

6. Bag according to claim 5, characterized in that said cannula (4 ′) is capable of sliding in said conduit (3), so that as a result of the opening of this conduit and of a traction effected on the second end (40 ') of the cannula (4'), it can be partially extracted by bringing its first end (4L) in the vicinity of the conduit (3) or inside of it.

7. Bag according to claim 6, in which the duct (3) extends in the extension of the pocket, characterized in that the latter comprises a pair of partitions (C) formed of zones in which the two walls are attached, which are interrupted in the vicinity of said conduit and which constitute means for guiding the cannula (4 ') during its partial extraction.

8. Bag according to claim 7, characterized in that the said partitions (C) consist of a series of aligned sections (T).

9. Bag according to claim 7, characterized in that said partitions (C) each delimit a compartment (Pi, P ₂ ) in the pocket, these compartments communicating with each other only when the cannula (4 ') is partially extracted.

10. Bag according to claim 6, characterized in that the duct (3) is extended by a channel (8), the assembly duct + cannula receiving the cannula (4 ') and extending next to the pocket ( P), that said pocket (P) communicates with said conduit (3) by an opening (9) and that in the absence of extraction of the cannula (4 '), the latter closes said opening (9), thus preventing the substance from flowing out of the pocket (P).

11. Bag according to claim 10 wherein the pocket (P) has an approximately elongated rectangular shape, characterized in that the assembly formed by said duct (3) and channel (8) extends parallel to the long sides of the pocket (P).

12. Bag according to one of claims 1 to 11, characterized in that it comprises means for opening the terminal part (30) of the conduit, these means consisting in particular of a peelable area.

13. Bag according to one of claims 1 to 12, characterized in that the narrowing of frustoconical section separates two portions (42, 43) of the cannula in which their section is circular and constant, that (43) the closer to the end part of the conduit (3) having a reduced diameter.

14. Strip of sachets (1) for packaging a liquid biological substance consisting of a juxtaposition of sachets according to one of the preceding claims.