ITBO20100297A1 - CAPSULE TO CONTAIN PREPARED FOR HOT DRINKS - Google Patents

Description

CAPSULE TO CONTAIN PREPARATIONS FOR HOT DRINKS

DESCRIPTION OF THE INVENTION

The present invention relates to capsules for containing preparations for hot drinks, such as in particular coffee or tea or milk and so on.

The capsules contain pre-dosed hot drink preparations and can be used with automatic machines to dispense the drinks themselves.

In practice, a dispensing machine of this type has a compartment, in which a glass can be prepared, and an access for inserting a capsule into the machine, which can be operated to send hot water under pressure into the inserted capsule. , where the active ingredients and / or aromas of the dose of the preparation are extracted or dissolved in the water itself, by infusion or by mixing, thus obtaining the hot drink, which then comes out of the capsule and is dispensed into the glass, in order to be consumed.

A type of capsule equipped with advantageous devices is the one disclosed in the Italian patent application n. BO2008A000112, filed on February 20, 2008 by the Applicant.

Said capsule comprises a cup-shaped body, comprising a tubular element, originating from the bottom of the cup-shaped body and developing internally thereto.

The dose of the hot drink preparation is received in an internal volume defined laterally by the side wall of the capsule.

In the tubular element, shaped like a tower, there is an axial cavity, which communicates with the outside of the capsule, and at least one passage to allow fluid-dynamic communication between the receiving volume and the cavity of the ™ tubular element.

In practice, after the dispensing machine has been activated, the hot water under pressure enters the internal volume from the top of the capsule, where a cap is fixed which allows the water to pass through.

Then, the hot water under pressure reacts with the preparation in order to form the drink, which then passes through the passage of the tubular element thus entering the cavity and, after passing through this, comes out of the capsule.

Among the advantages of using these capsules, there is that, unlike capsules previously known on the market, they do not need to be violently deformed during the formation and dispensing of the drink. Therefore, the risks of structural failure of the capsule during use in automatic machines are avoided.

Furthermore, the aforesaid passage of the tubular element is configured to prevent the transit in the axial cavity of unsolved and suspended grains of preparation in the beverage, if the granulometry exceeds a given threshold.

In this way, these unsolved garni will not be present in the glass after dispensing.

Currently, as regards, for example, hot drinks obtained from a soluble preparation, during the process of forming the drink itself, the dose of preparation does not completely `` dissolve '' in the hot water that enters the capsule under pressure (more precisely, it does not all disperses to form a solution).

By dispersing all the preparation in the water, a hot drink could be obtained which, with the same dose of preparation, has a more intense taste, or â € œFull-bodiedâ € as they say colloquially, and therefore is better.

The purpose of the present invention is to make available a capsule to contain a dose of preparation for a hot drink, which chasuble allows, if the preparation is of the soluble type, to be used with a dispensing machine in order to obtain a hot drink in which The dose of preparation is substantially completely dispersed.

This object is achieved by the capsule for containing a dose of preparation for a hot drink, according to claim 1, conceived in the manner described below.

The proposed capsule can be used with machines for dispensing hot drinks, and includes:

- a body shaped like a cup, having a bottom and one or more side walls,

- at least one tubular element, originating from the bottom of the body and developing internally to the latter, having one or more side walls and a cavity, - an internal volume to contain a dose of the preparation, and to receive hot water fed under pressure from the machine for reacting with the dose of preparation and forming the hot drink, which internal volume has a lateral periphery defined by the side wall of the capsule,

- in the tubular element, transit means configured in such a way as to allow the passage of the hot drink within the cavity of the tubular element,

- an outlet opening to put the cavity of the tubular element and the outside of the capsule into fluid-dynamic communication, and

- several flow ribs obtained inside the capsule on its bottom, shaped and arranged with respect to each other in such a way as to define several flow channels in which the hot drink being formed can flow, originating turbulent flows in the hot drink in training itself.

We remind you that the hot drink in question includes hot water in which the active ingredients and / or aromas of the preparation are present.

Usually the preparation is in powder form.

The capsule according to the invention is preferably made of a non-toxic plastic material such as propylene.

To explain how the invention achieves the aforementioned purpose, we will refer below to the case of a soluble-type hot drink preparation, such as that used to brew tea, after which reference will be made to preparations for forming beverages by infusion, such as in the case of coffee, further advantages of using the proposed capsule will be explained here.

The top of the capsule, where the upper edges of its side wall are located, is intended to be covered at the top either by a cap or by films or by pads in a known way, and therefore not discussed here.

Whichever solution is adopted to cover the top, the relative coverage will act as an upper limit for the internal volume.

Through known methods, the hot water under pressure is sent into the internal volume from the top, crossing the roof in a way known per se.

After the hot water under pressure has entered the internal volume of the proposed capsule, the dose of preparation begins, as they say colloquially, to â € œ dissolveâ € in the water (more properly speaking of solvation), and in this stage the hot drink is being formed.

Since the capsule according to the invention includes the flow ribs defined above, the beverage being formed, having the kinetic energy of hot water under pressure, enters the flow channels and is thus forced to originate flows turbulent in the beverage in formation contained in the capsule, which is about to be evacuated from the capsule itself.

In practice, turbulent flows have an effect on the solubility of the preparation similar to that of the known mechanical mixing or stirring operations on a liquid substance in which a substance is present in it soluble, and that is to say it is made more the chemical reaction that leads to the mixing of the two substances in a solution is efficient.

In other words, the presence of turbulent flows in the beverage being formed facilitates the mixing between the soluble preparation and the water, ie the dispersion of the soluble in the water and in the beverage being formed.

From experiments conducted by the Applicant, the proposed capsule is able to â € œ dissolveâ € practically all or just the entire dose of soluble preparation.

The capsule according to the invention, very advantageously, can be used for dispensing infusions, and is designed to achieve a particular result explained below.

Among the hot drinks that are created by infusion, there is for example coffee.

To obtain the coffee, which is dispensed into the glass by the machine, the infusion made up of hot water under pressure and the preparation for the coffee must be filtered.

The filter can be arranged in the capsule, and the expedients to prepare the filter in the proposed capsule, and the relative advantages, will be explained later in the description of particular embodiments of the invention, and with the aid of the figures attached.

In the capsule according to the invention, the filter is fixed above the tubular element, because there are the transit means by which the hot drink formed has access to the cavity and from this, through the opening of leaking, comes out of the capsule, for dispensing into the cup placed in the compartment of the machine.

Therefore, in this case, the aforementioned internal volume is limited below by the filter and is located above the tubular element.

Once filtered, the hot beverage being formed is located in a part of the capsule which includes its bottom, in which the flow ribs are present. At this point, the hot beverage in formation, having the kinetic energy of the pressurized water that composes it, enters the flow channels and is forced to originate turbulent flows in the beverage in formation contained in the capsule, before it is evacuated from the capsule itself.

As stated above, the formation of turbulent flows creates effects similar to those obtainable by mixing in the hot drink.

In this case the effect is comparable to a mixing carried out with great efficiency in a small space which, in the case of coffee or other similar infusions, leads to a significant increase in foam in the coffee being formed and therefore in the brewed coffee.

The more frothy coffee has, the more, as they say colloquially, it is â € œcremierâ €, and it is undisputed that a coffee tastes better the more creamy it is.

If the preparation contained in the capsule of the invention is for milk or the like, since it is of the soluble type but also includes a not negligible quantity of surfactants (for example milk fat), then the capsule will have on it an effect that is the sum of the two described above, and that is, it will "dissolve" almost everything and will create a considerable amount of foam in it.

Specific embodiments of the invention, and advantageous technical-functional characteristics related to these embodiments only partially derived from the above description, will be described in the following of the present discussion, in accordance with what is reported in the claims and with the aid of the attached drawing tables, in which:

- figure 1A and figure 1B are axonometric views of two embodiments of the capsule according to the invention;

- figure 2A and figure 2B are top views of the capsule;

- figure 3A is a cross-section of figure 1A;

- figure 3B is a cross-section of figure 1B;

- K is an enlarged detail of figure 3A;

- Kâ € ™ is the detail K rotated and enlarged;

- J is an enlarged detail of figure 3B;

- figure 4 and figure 5 are axonometric cut-outs of a further embodiment of the capsule;

- W and Wâ € ™ are respectively an enlarged detail of figure 4 and an enlarged detail of figure 5; And

- Figure 6 is an axonometry with a view from below of the proposed capsule.

With reference to the attached tables, 1 indicates the capsule to contain a dose of preparation for a hot drink, according to the invention.

Figures 1A, 1B, 1C, 2A, 2B, 3A, 3B and 4 show: the body 2 shaped like a cup, with the bottom 21 and the side wall 22; the tubular element 3, with its lateral wall 31 and its cavity 32 which ends at the bottom with the outlet 33; the internal volume 4, with its lateral periphery 41; and means of transit 5.

In detail, figures 2A, 2B, 3A, 3B and 4 clearly illustrate how the flow ribs 6 and the flow channels 7 are made.

Preferably, for reasons of economy and greater structural solidity, the flow ribs 6 are formed in a single body with the bottom 21.

Always preferably, capsule 1 is obtained in its entirety in a single body. In the same figures cited above, the preferred embodiment of the capsules 1 is shown, in which the body 2 has a cylindrical side wall 22, the tubular element has a substantially frusto-conical side wall 31 and a substantially frusto-conical or cylindrical cavity 32, with axis of symmetry coinciding with that of the side wall 31.

In practice, the tubular element 3 and its cavity 31 have the shape of the aforementioned solids of rotation except for the region affected by the transit means 5, which will be described later.

Preferably, the outlet 33 is placed in the bottom 21, so that the hot drink, once formed, comes out of the capsule 1 and can be dispensed spontaneously by gravity, which facilitates the construction of the machines for which it is intended. the capsule 1 proposed, since in this way the compartment for the glass can simply be provided under the access for the insertion of the capsule. Not only that, but the tubular element 3 and consequently the outlet opening 33 can be arranged centrally with respect to the cup-shaped body 2, because a symmetrical geometry makes it easier to make the capsules and to use them with machines. on the market, and their more efficient use.

In the machines on the market, the inserted capsules 1 are used by orienting them with the bottom 21 placed at the bottom and with the aforementioned axes of symmetry vertically, and it is to this orientation that we will refer in the following describing the components of the invention.

Preferably, the flow ribs 6 have a horizontal longitudinal development, each of them comprising a wall arranged vertically, so as to clearly define the flow channels 7 (see for example Figures 2A, 3A or 2B).

The walls of the flow ribs 6 are preferably longer and wider than thick, so that it is possible to have a greater number of them for the same available surface area of the bottom 21.

In practice, each rib 6 is shaped like a flange which protrudes from the bottom 21 towards the inside of the capsule 1.

Another way to say it is that the ribs 6 are similar to dividers that separate the flow channels 7 defined on the bottom 21 from each other.

It is not necessary that the flow channels 7 be in a predefined number, but it is simply preferable that, given a certain space available along the bottom 21, as much as possible is obtained, in order to produce as many turbulent flows as possible. In one embodiment, the flow ribs 6 have a spiral development (see for example Figures 1A, 2A and 3A).

Two or more spiral-shaped ribs 6 define spiral-shaped flow channels 7 (see Figure 2A), which lead to the production of turbulent flows which assume a trajectory that surrounds the tubular element 3.

In practice, the turbulent flows rotate around the tubular element 3, along an orbit. These types of turbulent flows are particularly effective in achieving the purpose of "dissolving" the soluble compound and / or producing foam in the hot beverage being formed.

In particular, the maximum efficiency is reached by using an embodiment in which the ribs 6 develop along ideal spirals having central axes placed in correspondence with the tubular element 3.

In another embodiment, illustrated in Figures 2B, 3B and 4, some or all of the flow ribs 6 are arranged in a radial pattern around the tubular element 3.

If most or all of the ribs 6 are arranged in a radial pattern, the consequence will be that many or all of the flow channels 7 defined by them will also be arranged in a radial pattern around the tubular element 3 (Figure 2B).

The radial arrangement of the flow ribs 6 has a significant advantage if provided in association with the expedient of placing the transit means 5 near the bottom 21.

In fact, since the radial flow channels 7 will tend to produce turbulent flows in the hot drink, they too have a radial trajectory with respect to the tubular element 3, and therefore with respect to the transit means 5, a faster and efficient confluence of the hot drink towards the transit means 5 themselves, facilitating the speed and efficiency of the drink dispensing. This embodiment becomes especially advantageous in the case of use with a preparation for infusions, such as coffee, as will become clear later after having described advantageous possible expedients of the invention.

It has already been clarified that, in the case of use with a preparation for infusions, the filter (not illustrated or described in detail because it is not part of the invention) must be fixed above the tubular element 3, because in this Lastly there are the transit means 5. The filter, for example in the shape of a disc, is fixed to the side wall 22, along its edge, for example with glue.

If the filter is fixed at a certain distance from the tubular element 3, the internal volume 4 available for receiving the dose of preparation decreases, which volume must obviously be above the filter.

This solution would be commercially negative, because it would lead the capsule to contain small doses of the preparation.

Furthermore, sections of the edge of the filter could detach from the side wall 22 when subjected to the stresses of the hot drink that passes through it during its filtration, since the filter itself is not supported except by the edge itself.

These stresses are essentially the pressure exerted on the filter from top to bottom by the hot drink being formed passing through it.

If sections of the filter edge are detached, part of the drink may not be filtered, with obvious disadvantages.

On the other hand, if the filter were placed on the tubular element 3, the aforementioned stresses could lead to tensioning of the filter, because its part which is supported by the tubular element 3 is constrained against the displacements towards the bass, with the consequence that the remaining part of the filter would be deformed. To completely avoid tensioning that could lead to possible risks of tearing the filter, it can be foreseen that the distance of the flow ribs 6 between them and with respect to the tubular element 3, and the height of the flow ribs 6 with respect to the height of the tubular element 3 are such that the stresses undergone by the filter, fixed inside the capsule 1 and resting on the tubular element 3 and on the flow ribs 6, are transferred to the same flow ribs 6 and to the tubular element 3, so that the filter remains intact during the use of the capsule 1.

In practice, if the filter rests on the flow ribs 6 and also on the tubular element 3, the above stresses do not translate into tensions, if not extremely low, for example in the case of two substantially parallel ribs , and therefore the integrity of the filter during the use of the capsule 1 is preserved.

The preferred configuration, which ensures the integrity of the filter in all conditions, is that in which all the flow ribs 6 have horizontal upper edges 61 as high as a horizontal upper face 30 of the tubular element 3.

This aspect can be seen precisely illustrated in figures 3B and 4 and in detail J, for example, while the upper edges 61 and the upper face 30 are not indicated in figures 2A and 2B for reasons of clarity. advantageous measures relating to the transit means 5. It should be noted that, in the embodiments described here, the transit means 5 are located in the side wall 31 of the tubular element 3.

This allows, as will be better clarified later, to make available more transit points for the cavity 32 (in practice formed by passages such as for example cracks or other solutions described in detail below), with the consequent increase in efficiency.

Having more transit points then allows you to configure them in particular ways, to obtain particular effects, as explained below.

First of all, a first possible aspect or version of the transit means 5 is described, with the aid of figures 3A, 3B and details K, Kâ € ™ and J.

The transit means 5 can comprise at least one slot 51 for the passage of the hot drink into the cavity 32 of the tubular element 3.

This slot can be vertical.

Preferably the slots 51 are eight and preferably they are equidistant around the side wall 31 of the tubular element 3.

Each slot 51 must be sized so that the grains of the powdery preparation, when it is `` dry '', i.e. no water has yet been inserted in the internal volume 4 (because for example the capsule 1 is not inserted in the machine) , cannot pass into cavity 32 and therefore cannot escape from capsule 1, thus preventing it from becoming unusable.

In practice, slot 51 is narrower than a grain of preparation is thin. Since the slot 51 is preferably thin, the invention may include particular expedients to dilate the slot 51 when the hot drink formed must pass into the cavity 32 to be then dispensed into the glass.

An expedient is to provide that the transit means 5 include at least one concave opening 52 within which the slot 51 is formed.

In this way, the hot drink is directed from the opening 52 towards the slot 51 which is therefore obtained in a region of the lateral wall 31 of the tubular element which is less thick than the remaining part, because the opening 52 corresponds to a break-in or thinning of the wall 31 itself.

Since the slot 51, and its surroundings, of lesser thickness, it will also have a greater plasticity, and therefore it can deform when the hot drink entered in the opening 52 presses on the slot 51 and around it, widening the slot 51 itself or even flattening it.

In practice, the edges that define the slot 51 are pushed towards the inside of the cavity 32 so as to diverge from one another.

The opening 52 is preferably tapered towards the slot 51 which is preferably made in an innermost portion 53 of the opening.

The effect explained above is increased by the further expedient according to which the concave opening 52 comprises an innermost portion 53 which has the lateral periphery placed on the lateral surface of a solid of rotation, preferably a cylinder, in the which inner portion 53 is formed the slit 51. Therefore, since the surrounding of the slit 51, in this case, has a curved surface, the pressure of the hot drink will force the edges of the slit 51 to spread apart, which to add to their above divergence.

Preferably, the innermost portion 53 and therefore the slot 51 are inclined with respect to the vertical in order to exploit gravity for the purpose of the more efficient passage of the hot drink into the cavity 32.

According to a preferential embodiment, the slot 51 is sized in such a way as to allow, while the hot drink is passing through the slot 51, the passage into the cavity 32 of the tubular element 3 of parts of the preparation suspended in the hot drink itself. , only if they have a particle size lower than a given value.

That is to say that, after the hot water under pressure has reacted with the preparation, if there are still unsolved grains of the preparation due to chemical defects in the preparation itself, then these grains, which are thick, do not enter the cavity 32 and therefore they do not come out of the capsule 1, so that they do not reach the cup.

In this way, there is not even the slightest compromise of the organoleptic qualities of the drink absorbed by the user.

The embodiment just explained allows the capsule 1 according to the present invention to obtain, with its own modalities, one of the advantageous results of the capsule already protected by the Applicant by means of the previous Italian patent application already cited.

A second aspect or version of the transit means 5 is described below, with reference to figures 4 and 5 and to details W and Wâ € ™, immediately after explaining a market need satisfied with this aspect or version.

The capsules currently on the market, when they are already packaged and that is they contain the dose of the preparation and are covered on the top, are sold either in packaging in a controlled atmosphere, which prevents oxidation of the preparation, or are configured to be airtight, so that © the air with its oxygen does not enter the capsules, which can be sold without the need for the use of a controlled atmosphere.

In the second case, they are said to be â € œOxygen Barrierâ € capsules.

Thanks to the aspect of the invention explained below, the proposed capsule 1 can also be advantageously used in the commercial sector of â € œOxygen barrierâ € capsules.

The transit means 5 can comprise at least one septum 50 having a mechanical resistance which is weakened with respect to the rest of the tubular element 3 so that, when the septum 50 is subjected to the pressure exerted on it by the hot drink, it breaks thus defining a passage for the transit of the hot drink within the cavity 32 of the tubular element 3.

In practice, before dispensing the hot drink, the cavity 32 is separated and isolated from the internal volume 4, where the preparation is contained, and from the entire internal part of the capsule 1, around the tubular element 3, where the hot drink is formed.

In fact, before the insertion of hot water under pressure, there are no passages for the fluid dynamic communication between the cavity 32 and the internal volume 4.

Therefore, the oxygen of the air that can enter the cavity 32 through the outlet opening 33, cannot reach the dose of preparation when the capsule 1 is sold in the limit loose or in any case in packaging without a controlled atmosphere. Preferably, the partition 50 comprises a recess 52 on an external side of the lateral wall 31 of the tubular element 3, which recess 52 has a side 521 in which there is an incision 501, in correspondence with which incision 501 the septum 50 has a thickness such that, when the septum 50 is subjected to said pressure of the hot drink, it breaks at the incision 501, to define a passage for the hot drink itself.

Thanks to this configuration, there is both a first structural weakening of the tubular element 3, consisting of the opening 52, which is a precondition for producing a passage for the cavity 32, and a second structural weakening, given by the incision 501, which not only serves to arrive at the thickness low enough for the drink to produce the passage, but also defines the position, shape and dimensions of the passage itself.

Preferably, the side 521 of the cutout 52 is convex, while the incision 501 is clearly concave.

This configuration allows, while maintaining the aforementioned weaknesses, to concentrate the action of the pressure of the hot drink on the tubular element 3 in correspondence with the incision 501, and that is precisely where the passage is to be produced.

For the reasons already explained in the description of the version of the transit means 5 with the slots 51, the partitions 501 can be more than one, for example three equidistant.

According to a particular embodiment, illustrated in many of the attached figures such as figure 3A or figure 4, the bottom 21 comprises a concave upper surface 211, from which the flow ribs 6 originate. Advantageously, the upper surface 211 of the bottom 21 it can have a concavity of curvature such as to favor the formation of turbulent flows in the hot beverage being formed.

in practice, as experienced by the Applicant, if the concavity of this upper surface 211 has a curvature greater than a given value, the hot drink being formed which passes through the flow channels 7, is directed, as well as by the walls of the ribs, also from the upper surface 211 of the bottom 21.

This facilitates and / or enhances the origin of turbulent flows in the hot beverage being formed.

Preferably, as illustrated in various attached figures, the concavity of this upper surface 211 is placed on the surface of an ideal sphere, because it is the conformation that makes it more effective to obtain the aforementioned result.

But there are possible configurations in which the concavity is placed on the surface of other quadrics or on the surface of an ideal torus that is around the tubular element.

Furthermore, according to a particular aspect, the concavity of the upper surface 211 of the bottom 21 has a curvature such as to be able to favor the outflow of hot drink being formed towards the tubular element 3.

This is achieved, for example, with an upper surface 211 of the bottom 21 placed on the surface of an ideal sphere.

This is especially advantageous in the case of capsule 1 designed for preparations for infusions, in which, as explained above, the transit means 5 are placed in proximity to the bottom 21.

A further embodiment is described below which allows the proposed capsule 1 to be used even with those machines on the market that are not configured to dispense hot drink if it comes out of the capsules from a single central point in the bottom of the capsule.

In these machines, in the seat provided for inserting the capsules to form and dispense the drink, there is sometimes a contact element that touches the lower face of the bottom of the inserted capsules.

Therefore, by inserting the capsule 1 proposed in such machines, there is a risk that the contact element cited will, so to speak, plug or partially obstruct the outlet opening 33, compromising the delivery of the hot drink . According to the further and advantageous embodiment of the invention, clearly shown in figure 6, in the lower surface 212 of the bottom 21, which is defined around the outlet opening 33 and faces the Outside of the capsule 1, there is at least one outlet groove 330, which originates from the outlet opening 33. The outlet groove 330 has a depth such that, if during the dispensing of the hot drink it was placed at contact with this lower surface 212 a contact element (see above) which would prevent the spontaneous outflow of the hot drink through the outflow opening 33, the hot drink itself would come out through the outflow groove 330.

There are preferably several exit grooves 330, for example eight, and they are arranged in a radial pattern, as in Figure 6.

To ensure the complete effectiveness of the use of the ejection grooves 330, the lower surface 212 of the bottom 21 has preferably a convexity, which has the consequence that the ejection grooves 330 have an upward bend and therefore they deviate completely from any contact element.

In this case, if both the internal surface 211 and the external 212 have a given curvature, it can be produced by the curvature of the whole bottom 21, as shown for example in Figures 3A and 3B.

It is understood that what above has been described by way of non-limiting example, therefore any constructive variants are understood to fall within the protective scope of the present technical solution, as claimed hereinafter.

Claims (18)

CLAIMS 1. Capsule to contain a dose of preparation for a hot drink, which hot drink comprises hot water in which the active ingredients and / or aromas of the preparation are present, the capsule (1) being usable with machines for dispensing drinks hot, and including: - a body (2) shaped like a cup, having a bottom (21) and one or more side walls (22), - at least one tubular element (3), originating from the bottom (21) of the body (2) and developing internally to the latter, having one or more side walls (31) and a cavity (32), - an internal volume (4) to contain a dose of the preparation, and to receive hot water fed under pressure from the machine to react with the dose of preparation and form the hot drink, which internal volume (4) has a lateral periphery (41 ) defined by the side wall (22) of the capsule (1), - in the tubular element (3), transit means (5) configured in such a way as to allow the passage of the hot drink inside the cavity (32) of the tubular element (3), e - an outlet opening (33) to put the cavity (31) of the tubular element (3) and the outside of the capsule into fluid-dynamic communication, the capsule (1) being characterized by the fact that it comprises several flow ribs (6) obtained within the capsule (1) on its bottom (21), shaped and arranged one with respect to the other in such a way as to define more flow channels (7) in which the hot drink being formed can flow, originating turbulent flows in the hot drink being formed. 2. Capsule according to claim 1, comprising flow ribs (6) which, when the capsule (1) is in use, have a horizontal longitudinal development, each of them comprising a wall arranged vertically. 3. Capsule according to claim 1, comprising flow ribs (6) arranged in a radial pattern around the tubular element (3). 4. Capsule according to claim 1, comprising spiral-shaped flow ribs (6). 5. Capsule according to the preceding claim, in which the spiral-shaped flow ribs (6) are placed on ideal spirals having central axes placed in correspondence with the tubular element (3). 6. Capsule according to any one of the preceding claims, wherein the distance of the flow ribs (6) between them and with respect to the tubular element (3), and the height of the flow ribs (6) with respect to the height of the tubular element (3) are such that, when the capsule (1) is in use, stresses suffered by a filter for hot drinks fixed inside the capsule (1) and resting on the tubular element (3) and on the flow ribs (6), are transferred to the same flow ribs (6) and to the tubular element (3), so that the filter remains intact during the use of the capsule (1). 7. Capsule according to the preceding claim, wherein, when the capsule (1) is in use, all the flow ribs (6) have horizontal upper edges (61) as high as a horizontal upper face (30) of the element tubular (3). 8. Capsule according to claim 1, wherein the transit means (5) of the tubular element (3) comprise at least one slot (51) for the passage of the hot drink inside the cavity (32) of the tubular element ( 3), and from there to the outside of the capsule (1) through the outlet opening (33). 9. Capsule according to the preceding claim, in which the slot (51) is dimensioned in such a way that, while the hot drink is passing through the slot (51), it is allowed to pass into the cavity (32) of the tubular element (3) parts of the preparation suspended in the hot drink itself only if they have a particle size lower than a given value. 10. Capsule according to claim 1, wherein the transit means (5) are located in the side wall (31) of the tubular element (3). Capsule according to the preceding claim and claim 8, wherein the transit means (5) comprise at least one concave recess (52) within which the slot (51) is formed. 12. Capsule according to the preceding claim, in which the concave opening (52) comprises an innermost portion (53), having a lateral periphery placed on the lateral surface of a solid of rotation, in which the internal portion is formed the slot ( 51). 13. Capsule according to claim 1, wherein the transit means (5) comprise at least one septum (50) having a mechanical strength which is weakened with respect to the rest of the tubular element (3) so that, when the septum (50) is subject to the pressure exerted on it by the hot drink, it breaks thus defining a passage for the hot drink to pass through the cavity (32) of the tubular element (3), up to the outlet opening (33) and, therefore, outside the capsule (1) itself. 14. Capsule according to the preceding claim and claim 10, wherein the partition (50) comprises a recess (52) on an outer side of the side wall (31) of the tubular element (3), which recess (52) has a side (521) in which there is an incision (501), in correspondence with which incision (501) the septum (50) has a thickness such that, when the septum (50) is subjected to said pressure of the hot drink, it breaks at the incision (501), defining a passage for the hot drink itself. Capsule according to any one of the preceding claims, wherein the bottom (21) comprises a concave upper surface (211) from which the flow ribs (6) originate and from which the tubular element (3) protrudes. Capsule according to the preceding claim, in which the upper surface (211) of the bottom (21) has a curvature concavity such as to be able to favor the formation of turbulent flows in the beverage being formed. 17. Capsule according to claim 15, wherein the upper surface (211) of the bottom (21) has a concavity with a curvature such as to be able to favor the outflow of hot drink being formed towards the tubular element (3). 18. Capsule according to any one of the preceding claims, wherein the outlet opening (33) is in the bottom (21) of the capsule (1), which bottom (21) has a lower surface (212), defined around at the exit opening (33) and facing the outside of the capsule (1), in which lower surface (212) there is at least one exit groove (330), which originates from the exit opening ( 33), the outflow groove (330) having such a depth that, when during the delivery of the hot drink, a contact element was placed in contact with this lower surface (212) that would prevent or hinder the spontaneous outflow of the hot drink through the outlet opening (33), the hot drink itself would come out through the outlet groove (330).