Patent Application
20160280453
This invention relates to a capsule for making beverages, in particular a capsule comprising inside it a powdered food substance which allows a beverage to be made by passing hot water through it.
In particular, this invention may be applied both in the case in which the capsule contains substances intended to allow the beverage to be made after they have been practically completely dissolved in the hot water, and in the case in which the capsule contains powdered food substances intended to allow the beverage to be made by extraction (such as coffee powder).
In more detail, this invention relates to the definition of a new capsule which can advantageously be used in the coffee machines of a system currently widespread on the market whose capsules are currently constituted of a cup-shaped aluminium body, closed at the top by a sheet of aluminium which is less resistant. The coffee machines used in said system comprise a first part and a second part which are mobile one relative to the other between an operating position and a home position. The first part forms a housing in which a capsule can be inserted, the inside of the housing being equipped with piercing elements which in use pierce a bottom portion of the cup-shaped body of the capsule. In the operating position, the first part and the second part clamp the capsule in the housing, creating a watertight seal outside the capsule. In this way, when pressurised hot water is fed into the housing, it penetrates the capsule through the holes made by the piercing element, and causes an increase in the internal pressure which makes the upper closing sheet swell, said upper closing sheet then being torn against piercing means which are fixed to the second part. At that point the beverage can come out of the capsule and be made to flow to the outside of the machine through suitable ducts.
It should be noticed that capsules which are alternatives to those made completely of aluminium are already on sale. They are usually capsules completely or at least mainly made of plastic material. In particular, all of the prior art capsules of this type have at least the tubular lateral wall and the upper flange made of plastic material. Some also have the bottom portion made completely of plastic material (which may be pre-pierced), whilst in others the bottom portion has an annular zone made of plastic material which delimits at the centre an opening that is closed by a flat sheet of aluminium.
However, all of the capsules which are alternatives to those made of aluminium, known on the market, are not without disadvantages.
In particular, the Applicant has been able to ascertain that at least with some types of known machines, the alternative capsules made at least mainly of plastic may reveal problems during the beverage supplying step. With some machines in particular of the latest generation, it was in fact found that in many cases the piercing elements either do not succeed in piercing the bottom of the capsule or they pierce it insufficiently.
The most common solution to this type of problem is to make capsules which are pre-pierced. However, that solution has the disadvantage that the capsules are no longer able by themselves to guarantee correct preservation of the powdered substance contained in them and they must therefore be packaged inside an additional wrapper which is impermeable to oxygen.
In this context, the technical purpose which forms the basis of this invention is to provide a capsule for making beverages which overcomes the above-mentioned disadvantages.
In particular, the technical purpose of this invention is to provide a capsule for making beverages which is an alternative to the prior art capsules, which can be made in such a way that it is both impermeable to oxygen and it guarantees optimum piercing by the piercing elements of the extraction device of any type of known machine.
The technical purpose specified and the aims indicated are substantially achieved by a capsule for making beverages as described in the appended claims.
Further features and the advantages of this invention are more apparent in the detailed description below, with reference to several preferred, non-limiting embodiments of a capsule for making beverages, illustrated in the accompanying drawings, in which:
With reference to the accompanying drawings, the numeral 1 denotes in its entirety a capsule for making beverages in accordance with this invention.
Similarly to the prior art capsules, the capsule according to this invention also contains a powdered food substance (not illustrated in the accompanying drawings) which allows a beverage to be made by passing hot water through it. Depending on requirements, the powdered food substance may be a substance which is soluble in water, therefore intended to come out of the capsule 1 together with the preparation water, or it may be a substance designed to allow the beverage to be made by extraction (such as coffee powder).
The capsule 1 comprises a cup-shaped containment body 2 closed at the top by a closing element 3. Advantageously, the containment body 2, the closing element 3 and their connection to one another (usually achieved by sealing or gluing) are made in such a way as to guarantee that the capsule 1 is hermetically sealed at least regarding the passage of oxygen, so as to be able to guarantee improved preservation of the powdered food substance. However, this invention also covers any capsules which are not oxygenproof, irrespective of whether or not they are in turn packaged in protective wrappers which may be able to guarantee that they are oxygenproof.
The containment body 2 forms inside it a containment chamber 4 which contains the powdered food substance, and comprises a tubular lateral wall 5 and a bottom portion 6 which closes the chamber 4 on the opposite side to the closing element 3. The tubular lateral wall 5 extends between a first edge 7 which is connected to the bottom portion 6 and a second edge 8 to which the closing element 3 is connected, and it has a central axis of extension (not shown in the accompanying drawings). Moreover, advantageously, the tubular lateral wall 5, and the containment body 2 as a whole, roughly have a frustoconical shape or in any case a shape converging from the second edge 8 towards the bottom portion 6. The bottom portion 6 in contrast extends at least partly transversally to the central axis of the tubular lateral wall 5, to close it.
According to the main innovative aspect of this invention, the bottom portion 6 comprises a first shaped sheet, and is preferably entirely constituted of it. The first shaped sheet, in particular, is bowl-shaped and the bottom portion 6 comprises a central zone 9 extending transversally to the central axis (and which in the embodiment illustrated is constituted of a concave lower wall and a frustoconical intermediate wall) and a connecting wall 10 which is perimetrically connected to the central zone 9, connected to the tubular lateral wall 5 at the first edge 7, and which comprises at least one component of extension parallel with the central axis (it should be noticed that in other embodiments the central zone and connecting wall may be constituted of a single profile, for example a spherical cap). In this way, along the direction defined by the central axis, the central zone 9 is at a distance from the first edge 7 and from the tubular lateral wall 5 as a whole (in other words, the projection of the central zone 9 on the central axis is at a distance from the projection on the central axis of the first edge 7 and of the entire tubular lateral wall 5).
Furthermore, the first sheet is made of a first material having a resistance to piercing and tearing which is less than that of a second material constituting the tubular lateral wall 5. In the preferred embodiment, in particular, the first sheet comprises at least one layer which is made at least mainly of aluminium, whilst the second sheet comprises at least one layer of plastic material, such as polypropylene or polyethylene. Moreover, advantageously, both the first sheet and the second sheet are made in such a way that they are substantially impermeable to oxygen. In the case of the first sheet, that result may be achieved with a suitable thickness of the layer of aluminium. In contrast, in the case of the second sheet, that result may be achieved by also including in the second sheet at least a second layer of a suitable material such as EVOH. However, the first sheet also advantageously comprises a further layer of polymeric material applied on the layer of aluminium on the side facing towards the powdered substance to prevent direct contact between said substance and the aluminium. Said layer of polymeric material may also be used as an “adhesive” during the step of fixing the first sheet to the tubular lateral wall 5 in the case of the embodiment in
Moreover, in the preferred embodiment, the first shaped sheet is drawn, whilst the tubular lateral wall 5 is made by moulding or thermoforming.
Finally, the closing element 3 may advantageously be made of the first material or of a similar material, or of a thin plastic film.
Preferably, the bottom portion 6 and the tubular lateral wall 5 are sized and/or shaped in such a way that, in use, one or more piercing elements 11 of a beverage-making device 12 in which the capsule 1 is intended to be used pierce the bottom portion 6 without damaging the tubular lateral wall 5 (
The tubular lateral wall 5, at the first edge 7, advantageously comprises a first radial flange 13 extending transversally to the direction defined by the central axis, preferably towards the central axis. In turn, the connecting wall 10 advantageously comprises a second radial flange 14 coupled to the first radial flange 13, and which preferably extends outwards relative to the central axis.
As shown in the accompanying drawings, coupling between the first flange 13 and the second flange 14 may be achieved either at the outer surface of the tubular lateral wall 5 (
Similarly to other prior art capsules, at the second edge 8 the tubular lateral wall 5 comprises a third radial flange 15, to which the closing element 3 is fixed, and which extends transversally to the direction defined by the central axis, preferably away from the central axis.
Finally, it should be noticed that according to this invention it is also possible that, inside the capsule 1, there is one or more filtering elements (not illustrated) for separating for example the powdered food substance from the central zone 9 or from the closing element 3.
The device 12 in turn comprises a first part 17 and a second part 18 which are mobile one relative to the other between an operating position and a home position.
The first part 17 comprises a housing 19 for the capsule 1 in which the capsule 1 can be inserted at least for most of its volume. In the embodiment illustrated, in particular, the entire capsule 1 with the exception of the third flange 15 can be inserted in the housing 19. In contrast, the third flange 15 rests on a perimetric edge 20 which delimits an insertion opening 21 through which the capsule 1 is inserted in the housing 19.
The second part 18 forms a sort of lid and can be coupled to the first part 17 to close the housing 19, and in use to clamp between itself and the perimetric edge 20 the third flange 15 of the capsule 1.
In fact, in the operating position, the first part 17 and the second part 18 clamp between them the capsule 1 inserted in the housing 19, whilst in the home position they allow the insertion and removal of the capsule 1 respectively in and from the housing 19. Associated with the third flange 15, the second part 18 and/or the perimetric edge 20, in the known way, there may be watertight sealing means designed to prevent the passage of liquid at the zone where the third flange 15 is clamped between the first part and the second part 18 in the operating position.
One or more piercing elements 11 are associated with the housing 19 for piercing the bottom portion 6 of a capsule 1, at least when the first part 17 and the second part 18 are in the operating position. In the preferred embodiment the piercing elements 11 are three metal blades (not necessarily sharp) which are fixed to the first part 17.
Water feeding means are operatively associated with the housing 19 for in use supplying water into the capsule 1, through the bottom portion 6 pierced by the one or more piercing elements 11. For that purpose, in the preferred embodiment the feeding means comprise a first duct 22 for the water which leads into the housing 19 at the piercing elements 11.
There are also piercing means designed to pierce the closing element 3 at least when the capsule 1 is inserted in the housing 19, the first part 17 and the second part 18 are in the operating position and the pressure in the chamber 4 exceeds a predetermined value. In the embodiment illustrated, the piercing means comprise a plurality of raised elements 23 fixed to the second part 18, against which the closing element 3 can tear when the pressure inside the capsule 1 increases to a predetermined value following the supplying of pressurised hot water into the chamber 4.
Associated with the piercing means there are beverage supplying means which allow the flow of the beverage, which comes out through the closing element 3, to the outside of the device 12 (in the embodiment illustrated the beverage supplying means comprise a second duct not illustrated which passes through the second part 18).
According to this invention, when the capsule 1 is inserted in the housing 19, and the first part 17 and the second part 18 are in the operating position, the one or more piercing elements 11 pass through the bottom portion 6 without damaging the tubular lateral wall 5.
Regarding production of the capsule 1 according to this invention, the preferred method generally comprises the operating steps of creating the bottom portion 6, creating the tubular lateral wall 5, connecting them to one another to create the containment body 2, inserting the powdered food substance in the chamber 4 and closing the top of the containment body 2 with the closing element 3.
In more detail, regarding creation of the above-mentioned bottom portion 6, the method comprises shaping the first material into a bowl shape, preferably by drawing a first sheet which comprises at least one layer made at least mainly of aluminium.
In contrast, the tubular lateral wall 5 is made using the second material, which has a greater resistance to piercing and tearing than that of the first material. In the preferred embodiment, the second material comprises at least one layer of plastic material and the tubular lateral wall 5 is made by moulding or thermoforming.
As already indicated, the method then comprises making the containment body 2 which is open at the top and which inside it forms the containment chamber 4. Advantageously, that is achieved by fixing a free edge of the connecting wall 10 to the first edge 7 of the tubular lateral wall 5.
However, for this purpose it should be noticed that the steps of creating the bottom portion 6 and fixing the bottom portion 6 to the tubular lateral wall 5 may be carried out in any order. In fact, it is both possible to shape the first sheet before fixing it to the tubular lateral wall 5, and to first fix the unshaped first sheet to the first edge 7 and then shape it.
Finally, it should be noticed that once the containment body 2 has been created, it is also possible to insert in it, before and/or after the powdered substance, said filtering elements, if present.
During use of the capsule 1 in the related device 12 for making beverages, with the first part 17 and the second part 18 in the home position, the capsule 1 is inserted in the housing 19 and the bottom portion 6 rests on the piercing elements 11. The subsequent movement of the first part 17 and the second part 18 to the operating position causes on one hand sealed clamping of the third flange 15 between the perimetric edge 20 and the second part 18, and on the other hand tearing of the bottom portion 6 against the piercing elements 11 (
Once the first part 17 and the second part 18 are in the operating position, the feeding means begin supplying hot water into the housing 19 and from the housing into the chamber 4 through the holes made by the piercing elements 11. The increase in the internal pressure then causes the closing element 3 to swell and be torn against the raised elements 23, allowing the beverage to be supplied.
This invention brings important advantages.
In particular, thanks to this invention it was possible to develop an alternative capsule to the prior art capsules, which, although it is not made entirely of aluminium, can be made in such a way that it is both impermeable to oxygen and able to always guarantee optimum piercing of the bottom portion by the piercing elements of the extraction device, with any type of supplying device of this type currently on the market. That result was achieved thanks to the fact that the zone for fixing the bottom portion to the tubular lateral wall has been axially distanced from the central zone.
Finally, it should be noticed that this invention is relatively easy to produce and that even the cost linked to implementing the invention is not very high. The invention described above may be modified and adapted in several ways without thereby departing from the scope of the inventive concept.
Moreover, all details of the invention may be substituted with other technically equivalent elements and the materials used, as well as the shapes and dimensions of the various components, may vary according to requirements.
| Number | Date | Country | Kind |
|---|---|---|---|
| VR2013A000285 | Dec 2013 | IT | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IB2014/065739 | 10/31/2014 | WO | 00 |
