NL2003270C2

NL2003270C2 - Pump for handling a fluid substance.

Info

Publication number: NL2003270C2
Application number: NL2003270A
Authority: NL
Inventors: Andreas Johannes Petrus Schalkwijk
Original assignee: Sara Lee De
Priority date: 2009-07-23
Filing date: 2009-07-23
Publication date: 2011-01-25

Description

P86346NL00

Pump for handling a fluid substance

The invention relates to a pump for handling a fluid substance, in particular for transferring and dispensing the fluid substance in a fluid or semi-fluid condition. In particular the invention relates to such a pump for hygienically handling the fluid substance under aseptic conditions.

5 A pump including an axially extending inner component, shaped as a body of revolution to define an outer peripheral surface thereon; an outer component substantially coextensive with the inner component defining an inner peripheral surface engaging the outer peripheral surface in a rotatable relationship; and having an inlet and an outlet, is known from US 2625885. In 10 the known pump the inner peripheral surface includes at least one helically extending groove, and the outer peripheral surface has a resilient portion positioned opposite a portion of the at least one helically extending groove and between the inlet and outlet. While this pump is relatively simple of construction and may be satisfactorily used for the metering of ink, it cannot 15 be used for fluid substances which are prone to microbial contamination or infection, without substantial risks. Such fluid substances include specifically, but are not limited to coffee extracts, tea extracts, chocolate beverages or concentrates, milk, flavours and like ingredients for consumable beverages.

Accordingly it is an object of the present invention to overcome or 20 ameliorate at least one of the disadvantages of the prior art. It is also an object of the present invention to provide alternative structures which are less cumbersome in assembly and operation and which moreover can be made relatively inexpensively. Alternatively it is an object of the invention to at least provide the public with a useful choice.

25 To this end the invention provides for a pump for hygienically handling a fluid substance under aseptic conditions, in particular for transferring and dispensing the fluid substance in a fluid or semi-fluid condition, the pump including: an axially extending inner component, shaped as a body of revolution to define an outer peripheral surface thereon; an outer component 2 substantially coextensive with the inner component defining an inner peripheral surface engaging the outer peripheral surface in a relatively movable relationship; an inlet; and an outlet, wherein at least one of the inner and outer peripheral surfaces includes at least one helically extending groove, 5 and the other of the inner and outer peripheral surfaces has a resilient portion positioned opposite a portion of the at least one helically extending groove and between the inlet and outlet, and wherein the outlet is in the form of a oneway valve allowing only fluid to be expelled from the outlet, but which is otherwise closed from the atmosphere.

10 The invention also provides for a cartridge including the pump of the invention in combination with a container filled with a supply of the fluid substance.

The invention further provides for a method of using the cartridge of the invention in a fluid dispensing system, wherein detection of an emptied 15 cartridge initiates an operation disabling any one of reusing and refilling of the cartridge.

Further advantageous embodiments of the invention will become apparent from the appended claims and from a detailed description of the accompanying drawings, in which: 20 Figure 1, in a perspective arrangement, shows a disposable cartridge including a container and an integrated pump and valve;

Figure 2A is a partial longitudinal cross section through the disposable cartridge of Figure 1;

Figure 2B is a cross-section according to the line A-A in Figure 2A; 25 Figure 3 is a perspective view of the central spout of the cartridge of

Figure 1-2B;

Figure 4 is a partial perspective view of a disposable cartridge with an alternative form of cover;

Figure 5 is a cross-sectional view of another alternative form of 30 disposable cartridge; 3

Figure 6 is an alternative execution of a flow tip; and

Figure 7 illustrates a possible form of container.

A disposable cartridge 1, as shown in Figure 1, includes a pump 3 and an outer casing 5. The outer casing 5 accomodates a supply of fluid substance 5 for dosing by pump 3. The fluid substance may include a coffee extract, a tea extract, a chocolate beverage or concentrate for the preparation thereof, milk, flavours or other ingredients or products for human consumption. The pump 3 is an integrated part of the cartridge 1. The disposable cartridge and pump according to the invention, is particularly suitable for the dispensing of 10 microbiologically sensitive ingredients for beverages a fluid or semi-fluid condition. Where in this specification reference is made to fluid condition or semi-fluid condition, this encompasses fluids and pastes of varying viscosity.

To this end the pump 3 is provided with an integrated outlet valve, which will be described in more detail in reference to Figures 2A and 2B. The pump 3 15 comprises an axially extending outer component 7, which is of elongate and conical shape and an inner component 9 co-axially extending within the outer component 7. The outer component 7 acts as a cover for the inner component 9, which can be referred to as a spout. The cover 7 further is provided with a resilient elastic portion 11 confronting a helical groove 13 formed in the spout 20 9. Figure 3 shows the spout 9 without cover and allows the helical groove 13 to be readily recognised. The resilient portion 11 also circumscribes a flow tip 9A at a distal end of the spout 9. The flow tip 9A and a circumscribing portion of the resiliently flexible portion 11 function as an outlet for the pump and as a one-way valve. At an opposite end the cover 7 is furnished with a drive 25 engaging element 15, which is here in the form of a square. Clearly the shape of the drive engaging element 15 can be selected by the skilled person to be of a form that securely lines up with a drive element of a machine or system into which the cartridge 1 may be insertable. Moreover the drive interface need not be at the opposite end to the exit or discharge port and many other 30 arrangements are indeed conceivable, including a drive interface associated 4 with the exit or discharge region of the pump. In use, the cover 7 will be rotated in the direction of arrow 17. The spout 9 includes an inlet opening 19 in communication with a collapsible inner container 21 in the form of a bag or pouch for holding a fluid substance. To keep the outer cover 7 and the inner 5 spout 9 in intimate contact during rotation, the spout 9 has a circumferential groove 23 and the cover 7 a mating inwardly extending annular ridge 25.

As explained above, the flow tip 9A and the circumscribing portion of the resiliently flexible portion 11 function as an outlet for the pump and as a oneway valve. The flexible portion 11 thereby forms a flexible membrane as part 10 of the so integrated one-way valve.This integrated pump and valve concept is particularly suitable for delivering microbiologically sensitive ingredients or products, but could also find application with other products benefitting from an integrated pump and seal. The system provides two functions: pumping of a liquid and preventing ingress of microbiological contamination. The pumping 15 function is provided by the central conical area by means of the helical groove 13 and elastomere portion 11 of the cover 7. The one-way valve function is provided by the flow tip area 9A by the elastic portion 11 surrounding it. The cover 7 can conveniently be made as a two-component injection moulding, where the main body can be in a suitable relatively rigid plastic and the 20 resilient elastic portion 11 in a thermoplastic elastomere. The spout 9 can also be made as an injection moulding from a single relatively rigid plastic material. The material of the spout 9 should also be suitable for integral connection to the collapsible inner bag 21. To this end the spout 9 can be shaped with a flange 27, which may connect both to the inner bag 21 and the 25 outer casing 5 of the cartridge 1.

The annular ridge 25 and groove 23 are preferably of such shape that the inner and outer pump components 9 and 7 may be connected by snap fitting. It is important for this connection to be leak free and microbial tight. There should also exist a useful surface pressure, which gradually reduces 30 towards the flow tip 9A, between the exterior peripheral surface of the spout 9 5 and the inner peripheral surface of the cover or sleeve 7 to prevent forming of a liquid film there between, or at least a minimum of liquid film. The conical shape of the inner and outer pump components 9, 7 helps to achieve this pressure differential towards the outlet. The diminishing surface pressure 5 towards the outlet provides for the dosing of fluids to be leak free as well as microbial tight, by preventing reverse flow.

The elastic portion 11 of the cover 7 is preferably shaped to press within the helical groove 13 of the spout 9. The tip of the cover 7, which has the circumscribing part of the resilient portion 11 is preferably under pre-tension 10 when fitted over the flow tip 9A.

In operation, the spout 9 and the collapsible bag remain in a stationary position. The cover 7 is rotated to rotate relative to the spout 9 by being driven through drive engaging element 15 by an external power source that is part of the machine or system using the cartridge 1. The resilient portion 11 pressing 15 into the groove 13 of spout 9 will provide a volume displacement, causing a pressure differential when the cover 7 is being rotated. The spout 9 will have a self pumping effect towards its flow tip 9A by means of a regressing surface pressure towards the one-way valve outlet opening, so formed. Thereby fluid residues are expelled from the flow tip area after the pumping motion has been 20 interrupted.

One advantage of this pump design is that the inlet and outlet are spaced by a substantial distance, from one another. Moreover the inlet and outlet are also spaced in a direction transverse to the direction of rotation of the pump. This arrangement of the inlet and outlet reduces the risk of reverse 25 contamination. The seal between the resilient tip of the cover 7 and the flow tip 9A prevents ingress of contamination by allowing only a one-way flow. It is also an advantage of the helical groove that it arranges for the pump to be self priming and only permits a one-directional pump flow. Further it is advantageous that the pump uses a minimum of individual components, 30 whereby it is cheap enough to be disposable together with the cartridge. This 6 aspect is of particular importance to ensure hygienic conditions in the preparation of beverages or other human necessities using microbial sensitive fluid ingredients, such as in particular dairy products.

Further improvements may be achieved by using antimicrobial 5 materials or additives, such as silver ion, in manufacturuing the pump parts, to improve the anti microbial properties of the pump. A similar improvement may be expected from using hydrophobic plastic materials. In particular low energy hydrophobic materials may be considered, as these are likely to spread any film and prevent droplets to be formed. Moreover such low energy 10 materials may also help to reduce friction between the relatively movable parts. Conceivably the resilient portion 11 may be supported for extra pressure on its exterior by an additional rigid sleeve.

A particular modification is shown in Figure 4. In this arrangement the cartridge 101 has a modified pump cover 107 with a resilient portion 111. The 15 resilient portion 111 is formed as a counter clockwise helix under 45°. With the helical groove 13 in a clockwise helix at 45°, as shown in Figure 3, this will provide for 90° intersections of the resilient portion 111 with confronting parts of the helical groove 13, which may further improve the pumping effect through a more optimal contact surface.

20 As shown in Figure 5 in another variation of the invention it is also possible to keep the outer cover 207 in a stationary position and to arrange for the spout 209 to be rotatable. In this arrangement the cover 207 is formed integrally with the outer casing 205 of the cartridge 201. To drive the spout 209, a gear 231 may be provided on its end near to the flexible bag 221, which 25 will now rotate together with the spout 209. This gear 231 can be meshed with a gear of an apparatus or system, using the cartridge 201, through an aperture 233. The casing 205 can have a bottom lid 235 to enable it to be assembled. In this arrangement the liquid substance rotates while being dispensed, which may provide an additional mixing effect.

7

Figure 6 shows another detail variation that may be combined with any of the embodiments so far described. Here the flow tip 309A is a separate element from the spout 309, but is rotatably connected thereto by a ball and socket joint 341. This will allow the flow tip to rotate with the outer cover 307 5 (or be stationary therewith in the case of the Figure 5 embodiment). This will reduce friction during pump operation.

Reference numerals as used to describe the above embodiments have been chosen to differ by an exact 100 or 200 with one another when these denote similar parts.

10 Figure 7 shows one possible form of container, suitable for use with the present invention. Figures 7is a cross-sectional side elevationof a cartridge 401 with a pump connecting structure 403 that is merely schematically represented. The container 421 is again a flexible pouch contained in a rigid outer casing 405.

15 It will be clear to the skilled person that the cartridge may be used in a vertical orientation. Nonetheless a horizontal orientation of the cartridge as shown may be attractive in that it helps reducing the height of machines or systems using the pump and cartridge assembly of the present invention.

Since the present invention is of particular interest to hygienic handling 20 of fluid substances it is important to prevent the reuse of discarded cartridges. Such fluid substances are moreover not limited to beverages for human consumption, but may also include pharmaceutical and cosmetic products. Therefore a single-use feature can be incorporated in the cartridge or pump that may be activated by the system or apparatus using the cartridge.

25 A method of using the cartridge may employ a specially programmed drive for driving the disposable pump and cartridge. The lifespan of the pump can be limited to the content of fluid substance (for example 2 litres, but any different volume may be employed). In particular the drive may be programmed to detect an empty container, upon which the machine will drive 8 the pump at a higher speed and without the cooling and lubricating effect of the fluid substance. This will cause more heath and destruction of the pump.

Unauthorised reuse of the cartridges may thereby be prevented, or at least discouraged. No additional modifications are needed to the basic design of 5 the pump to practise this method.

Similarly, upon detection of an empty container, the drive speed can be increased in combination with a reversal of the direction of rotation. This may additionally provoke that the helical groove 13 will eat itself into the cover 7, like a cork screw. This will produce additional heath and friction to the 10 destruction process. In normal operation the helix 13 on the spout 9 turns clockwise in respect of the cover 7, or the cover 7 turns counter clockwise with respect to the spout 9.

It is also possible to modify the pump for one-way rotation only. Rotation in an opposite direction, initiated by detection of an empty container, will 15 instantly mechanically destroy the pump.

Although not specifically shown in the embodiments described, it is perfectly possible to include more than one helically extending groove into the design of the pump.

It is thus believed that the operation and construction of the present 20 invention will be apparent from the foregoing description. The invention is not limited to any embodiment herein described and, within the purview of the skilled person; modifications are possible which should be considered within the scope of the appended claims. Equally all kinematic inversions are considered inherently disclosed and to be within the scope of the present 25 invention. The term comprising when used in this description or the appended claims should not be construed in an exclusive or exhaustive sense but rather in an inclusive sense. Expressions such as: "means for ...” should be read as: "component configured for ..." or "member constructed to ..." and should be construed to include equivalents for the structures disclosed. The use of 30 expressions like: "critical", "preferred", "especially preferred" etc. is not 9 intended to limit the invention. Features which are not specifically or explicitly described or claimed may be additionally included in the structure according to the present invention without deviating from its scope.

Claims

1. Pomp voor aseptische behandeling van een vloeibare substantie, in het bijzonder voor het overbrengen van en het afgeven van de vloeibare 5 substantie in een vloeibare of half vloeibare toestand, de pomp is voorzien van: een zich axiaal uitstrekkende binnenstecomponent, die als rotatieslichaam is gevormd om een buitenste omtreksoppervlak daarop te bepalen; een buitenste component in hoofdzaak van dezelfde grootte met de 10 binnenstecomponent die een binnenste omtreksoppervlak bepaalt die de buitenste omtreksoppervlak aangrijpt in een vrij beweegbare verhouding; een inlaat; en een uitlaat, waarbij minstens enkele van de binnenste en buitenste omtreksoppervlakken 15 minstens enkele schroeflijnvormig zich uitstrekkende groef omvat, en heeft de andere van de binnenste en buitenste omtreksoppervlakken een veerkrachtig gedeelte dat tegenover een gedeelte van minstens enkele schroeflijnvormig zich uitstrekkende groef is geplaatst en dat tussen de inlaat en de uitlaat is geplaatst 20Pump for aseptic treatment of a liquid substance, in particular for transferring and delivering the liquid substance in a liquid or semi-liquid state, the pump comprising: an axially extending inner component, which is a rotational body formed to define an outer peripheral surface thereon; an outer component substantially of the same size with the inner component that defines an inner peripheral surface that engages the outer peripheral surface in a freely movable relationship; an inlet; and an outlet, wherein at least some of the inner and outer circumferential surfaces 15 comprise at least some helically extending groove, and the other of the inner and outer circumferential surfaces has a resilient portion that is opposed to a portion of at least some helically extending groove and that is placed between the inlet and the outlet 20

2. Pomp volgens conclusie 1, waarbij de minstens enkele zich schroeflijnvormig uitstrekkende groef een eerste axiaal uiteinde en een tweede axiaal uiteinde omvat.2. Pump according to claim 1, wherein the at least some helically extending groove comprises a first axial end and a second axial end.

3. Pomp volgens conclusie 2, waarbij de inlaat met het eerste axiaal uiteinde van minstens enkele schroeflijnvormig zich uitstrekkende groef is geassocieerd.The pump of claim 2, wherein the inlet is associated with the first axial end of at least some helically extending groove.

4. Pomp volgens conclusie 2 of 3, waarbij de uitlaat voorzien is van een terugslagklep uitsluitend vloeistof toestaat om van de uitlaat te zijn verdreven, maar die voor het overige van de atmosfeer afgesloten is.Pump according to claim 2 or 3, wherein the outlet provided with a non-return valve only allows liquid to be expelled from the outlet, but which is otherwise sealed off from the atmosphere.

5. Pomp volgens conclusie 4, waarbij de uitlaat bepaald is door het veerkrachtige gedeelte dat zich elastisch vanaf het tweede axiaal uiteinde kan expanderen van de minstens enkele schroeflijnvormig zich uitstrekkende groef door druk uitgeoefend op de vloeistof die in gebruik door de minstens enkele schroeflijnvormig zich uitstrekkende groef is o ver gebracht, daardoor 10 de terugslagklep vormend.The pump of claim 4, wherein the outlet is defined by the resilient portion that can elastically expand from the second axial end of the at least some helically extending groove by pressure exerted on the fluid which in use extends through the at least some helically extending groove is raised, thereby forming the check valve.

6. Pomp volgens een voorafgaande conclusie, waarbij de minstens enkele zich schroeflij nvormige uitstrekkende groef in de binnenstecomponent is verschaft. 15The pump of any preceding claim, wherein the at least some helical extending groove is provided in the inner component. 15

7. Pomp volgens een voorafgaande conclusie, waarbij de inlaat op de binnenstecomponent is.The pump of any preceding claim, wherein the inlet is on the inner component.

8. Pomp volgens een voorafgaande conclusie, waarbij de 20 binnenstecomponent als stator en buitenste component functioneert als rotor.8. Pump as claimed in any of the foregoing claims, wherein the inner component acts as a stator and outer component functions as a rotor.

9. Pomp volgens conclusie 8, waarbij de buitenste component is aangepast om roteerbaar zijn aangedreven.The pump of claim 8, wherein the outer component is adapted to be rotatably driven.

10. Pomp volgens conclusie 9, waarbij de buitenste component integraal is voorzien van een aandrijfmiddel.The pump of claim 9, wherein the outer component is integrally provided with a drive means.

11. Pomp volgens een voorafgaande conclusie, waarbij de binnenste en buitenst omtreksoppervlakten taps verlopend zijn uitgevoerd. 30The pump of any preceding claim, wherein the inner and outer peripheral surfaces are tapered. 30

12. Pomp volgens een voorafgaande conclusie, waarbij de binnenste en buitenste componenten antimicrobiële materialen omvatten.The pump of any preceding claim, wherein the inner and outer components comprise antimicrobial materials.

13. Pomp volgens conclusie 12, waarbij de antimicrobiële materialen 5 zilverionenmateriaal omvatten.13. Pump according to claim 12, wherein the antimicrobial materials comprise silver ion material.

14. Pomp volgens een voorafgaande conclusie, waarbij de binnenste en buitenste componenten hydrophobische materialen, bij voorkeur lage energie hydrophobische materialen omvatten. 10Pump according to any preceding claim, wherein the inner and outer components comprise hydrophobic materials, preferably low energy hydrophobic materials. 10

15. Pomp volgens een voorafgaande conclusie, waarbij de minstens enkele zich schroeflijnvormig uitstrekkende groef een hoek insluit van tussen 30° en 60°, bij voorkeur nagenoeg 45°, met betrekking tot de axiale richting van de binnenste en buitenste componenten. 15Pump according to any preceding claim, wherein the at least some helically extending groove encloses an angle of between 30 ° and 60 °, preferably substantially 45 °, with respect to the axial direction of the inner and outer components. 15

16. Pomp volgens een voorafgaande conclusie, waarbij de binnenstecomponent een stroomuiteinde bepaalt dat zich axiaal op zijn minst, zover als de buitenste component uitstrekt.The pump of any preceding claim, wherein the inner component determines a flow end that extends axially at least as far as the outer component.

17. Pomp volgens conclusie 16, waarbij de binnenstecomponent in de vorm van spui is uitgevoerd en de buitenste component in de vorm van een flexibele kokervormige huls is uitgevoerd.The pump of claim 16, wherein the inner component is in the form of a spout and the outer component is in the form of a flexible tubular sleeve.

18. Pomp volgens conclusie 16 of 17, waarbij het stroomuiteinde met 25 betrekking tot een rest van de spui roteerbaar is, om met betrekking tot de huls stationair te blijven waarmee het onder wrijving in aangrijping is.18. Pump according to claim 16 or 17, wherein the flow end is rotatable with respect to a rest of the drain, so as to remain stationary with respect to the sleeve with which it is engaged under friction.

19. Pomp volgens conclusie 18, verder voorzien van een kogelgewrichtverbinding tussen het stroomuiteinde en de rest van de spui. 30The pump of claim 18, further comprising a ball joint connection between the flow end and the rest of the drain. 30

20. Pomp volgens een van conclusies 16 tot 19, waarbij de spui en de huls een kegelvorm hebben en waarbij de perifere contactdruk tussen de huls en de spui controleerbaar is door de huls met betrekking tot de spui axiaal te verplaatsen. 5Pump according to any of claims 16 to 19, wherein the drain and the sleeve have a conical shape and wherein the peripheral contact pressure between the sleeve and the drain can be controlled by moving the sleeve axially relative to the drain. 5

21. Pomp volgens een voorafgaande conclusie, waarbij de pomp is ingericht om minstens een enkele te zijn van: bestand tegen onbevoegd ingrijpen en onbevoegd ingrijpen aantonend.A pump according to any preceding claim, wherein the pump is arranged to be at least a single one of: proof of unauthorized intervention and demonstrating unauthorized intervention.

22. Pomp volgens een voorafgaande conclusie, waarbij de pomp uitsluitend voor eenrichtingsrotatie is geconstrueerd en waardoor gedwongen rotatie in een omgekeerde richting de integriteit van de pomp vernietigt.A pump according to any preceding claim, wherein the pump is constructed solely for one-way rotation and whereby forced rotation in a reverse direction destroys the integrity of the pump.

23. Patroon voorzien van de pomp volgens een van conclusies 1 tot 22 en 15 een houder die met een voorraad van de vloeibare substantie is gevuld.A cartridge provided with the pump according to any one of claims 1 to 22 and a container filled with a supply of the liquid substance.

24. Patroon volgens conclusie 23, waarbij de vloeibare substantie een ingrediënt voor menselijke consumptie is.The cartridge of claim 23, wherein the liquid substance is an ingredient for human consumption.

25. Patroon volgens conclusie 23 of 24, waarbij de houder flexibel en samenvouwbaar is.The cartridge of claim 23 or 24, wherein the container is flexible and collapsible.

26. Patroon volgens conclusie 25, waarbij de samenvouwbare houder binnen een vrij stijf buitenste omhulsel is ondergebracht. 25The cartridge of claim 25, wherein the collapsible container is housed within a relatively rigid outer shell. 25

27. Patroon volgens conclusie 25 of 26, waarbij de samenvouwbare houder aan de pompinlaat permanent bevestigd is.A cartridge according to claim 25 or 26, wherein the collapsible holder is permanently attached to the pump inlet.

28. Patroon volgens een van conclusies 25 tot 27, waarbij de 30 samenvouwbare houder een zak is.28. A cartridge according to any of claims 25 to 27, wherein the collapsible holder is a bag.

29. Patroon volgens een van conclusies 23 tot 28, waarbij het hergebruik van een enkele van: de pomp en de houder onmogelijk is.A cartridge according to any of claims 23 to 28, wherein the reuse of a single of: the pump and the container is impossible.

30. Patroon volgens een van conclusies 23 tot 29, waarbij de patroon er een is van een constructie, die: minstens bestand tegen onbevoegd ingrijpen en onbevoegd ingrijpen aantonend is uitgevoerd.A cartridge according to any of claims 23 to 29, wherein the cartridge is one of a construction that: has at least been designed to withstand unauthorized intervention and unauthorized intervention.

31. Methode om de patroon volgens een van conclusies 23 tot 30 in een 10 afgiftesysteem voor vloeistof te gebruiken, waarbij de detectie van een leeggemaakte patroon een handeling in werking stelt die een van: het opnieuw gebruiken en het opnieuw vullen van de patroon onmogelijk maakt.A method of using the cartridge according to any of claims 23 to 30 in a liquid delivery system, wherein the detection of an emptied cartridge initiates an operation that makes one of: reusing and refilling the cartridge impossible .

32. Methode volgens conclusie 31, waarbij de onmogelijk makende 15 handeling lang genoeg het drijven van de pomp bij bovenmatige snelheid voor een periode omvat om de pomp door hittewerking te vernietigen.32. The method of claim 31, wherein the prohibiting operation includes driving the pump at excessive speed for a period of time to destroy the pump by heat action.

33. Methode volgens conclusie 31 of 32, waarbij de onmogelijk makende handeling het omkeren van de rotatierichting van de pomp omvat. 20The method of claim 31 or 32, wherein the disabling action comprises reversing the direction of rotation of the pump. 20

34. Methode volgens een van conclusies 31 tot 33, waarbij de onmogelijk makende handeling het doorprikken van de samenvouwbare zak omvat.The method of any one of claims 31 to 33, wherein the disabling action comprises puncturing the collapsible bag.