Technical cap for bottles

Abstract

The present invention relates to a technical cap (1) for bottles (2) for fizzy wine or sparkling wine refermented in bottle, comprising: a capsule (3), inside which a first cavity (4) is defined, having an at least partially substantially cylindrical conformation, comprising a first lateral surface (5) in which there is a first access opening (6), in f luid communication with a substantially cylindrical chamber (7) of said capsule (3), designed to accommodate an open end (8) of the neck (9) of a bottle (2) and to be hermetically fixed to the same by hermetic fixing means (10, 13) of a such technical cap (1), the first cavity (4) being also accessible through a, substantially cylindrical, access hole ( 14 ), obtained coaxially with the first cavity (4); - a shutter (16), inserted into the first cavity (4) through the access hole (14) in such a way as to hermetically close the latter, wherein the shutter (16) comprises an operating portion (17), comprising a second lateral surface (18), facing the first lateral surface (5) of the first cavity (4), in which a second access opening (19) to a second cavity (20), obtained inside the shutter (16), is obtained, wherein the shutter (16) is rotatable inside the first cavity (4), around a medium cylindrical axis (15) of said first cavity (4), between a collection position thereof, in which the second access opening (19) faces the first access opening (6), and a storage position thereof, in which the second access opening (19) faces a first closed region (21) of the first lateral surface (5) of the first cavity (4), so as to be hermetically closed by it, and a second closed region (22) of the second lateral surface (18) faces the first access opening (6), so as to hermetically close it.

Description

[0001] TECHNICAL CAP FOR BOTTLES

[0002] The present finding refers to a technical cap for bottles for fizzy wine or sparkling wine refermented in bottle.

[0003] Nowadays, for the production of fizzy wine and sparkling wine, methods are known which involve a secondary fermentation (or refermentation) of the wine, obtained directly inside the bottle after this latter has been capped; after refermentation, the wine must be decanted in order to separate from the liquid part of the wine the yeasts and their precipitates, which must then be removed from the wine .

[0004] In some known methods, wine decanting takes place after provisionally capping the bottle with a crown cap provided with a small plastic cylinder open towards the inside of the bottle (the so-called Bidule) , starting from a position in which the bottle is arranged with its medium longitudinal axis oriented substantially horizontally, by rotating periodically such a bottle until bringing the medium longitudinal axis thereof to a desired angle in which the cap turns downward, and simultaneously by rotating periodically the bottle around the medium longitudinal axis thereof, so as to facilitate the accumulation of yeasts and their precipitates in the neck of the bottle itself; the neck region of the bottle is then immersed in a freezing bath until completely solidifying the wine (containing yeasts and precipitates) in such region, and then the bottle is uncapped in order to remove, along with the crown cap, the solid mass of wine, yeasts, and precipitates contained in the neck.

[0005] The bottle is then permanently capped, typically by a cork (or equivalent material) totally or partially inserted into the neck of the bottle and then locked with a metal cage.

[0006] However, such methods have the drawback that, from step of uncapping the crown cap to the subsequent step of applying the final cap, the wine is subjected to contact with air, which can cause deterioration processes, and in order to counteract them, preservatives such as sulphites, whose consumption by humans is subject to regulatory limits, are generally added to the wine.

[0007] Furthermore, the procedure of freezing, subsequently uncapping and consequently applying of a final cap is complex and requires long execution times .

[0008] In order to overcome such drawbacks, and in particular to allow the yeasts and their precipitates to be removed from the wine after refermentation, reducing as much as possible the contact of the wine with air, solutions are also known that involve the use of special technical caps provided therein with a spherical cavity, for collecting yeasts and precipitates, which is open towards the neck of the bottle and can be selectively reclosed by means of a hemispherical valve operable through a dedicated cap lever, so as to isolate the spherical cavity from the rest of the bottle after accumulating yeasts and precipitates therein.

[0009] Such known caps are applied to the bottle, instead of the crown cap described above, and the bottle is then positioned with its medium longitudinal axis arranged horizontally until completing the refermentation process, after which the bottle is subjected to the rotation process described above.

[0010] During refermentation and subsequent rotation, the hemispherical valve of the technical cap is maintained in the open position thereof, i.e. , such as to allow the fluid communication between the inside of the bottle and the collection cavity of the cap; the yeasts and their precipitates present in the wine are accumulated by gravity in the collection cavity of the cap, which, after a desired time, can be closed by operating the hemispherical valve from the outside of the technical cap, through the lever present in this latter.

[0011] In this way, the yeasts and their precipitates are separated from the wine without the need to uncap and then recap the bottle, or to freeze part of the liquid therein, as instead happens in the known methods described above.

[0012] A technical cap of this type is described, for example, in European patent EP2729381B1; such known solution describes a technical cap for capping fizzy wine or sparkling wine refermented in the bottle, provided with a containment chamber that can be hermetically sealed under pressure by a rotating hemispherical valve, which can be manually operated from an open position to a closed position by an external rotation lever. The top of the containment chamber is shaped as a removable lid. However, such known-type technical cap solutions have some drawbacks.

[0013] In particular, such known solutions typically have sealing problems with the hemispherical valve, and consequently the risk that yeasts and precipitates enclosed in the containment chamber return in the wine when the bottle is rotated with the cap facing upwards.

[0014] Furthermore, assembling such known-type technical caps, requiring the assembly of cap, valve, lever for the operation thereof, and the related seals between such components, is rather complex and time-consuming.

[0015] The main task of the present finding is to obtain a technical cap for bottles for fizzy wine or sparkling wine refermented in the bottle, which overcomes the problems of the cited prior art, and in particular which allows yeasts and their precipitates to be removed from the wine through a decantation process, without needing to uncap the bottle, and reduces, with respect to the known technical caps cited above, the risk that such yeasts and precipitates, once removed, return to the wine.

[0016] In the scope of such task, an object of the present finding is to obtain a cap for bottles for fizzy wine or sparkling wine refermented in the bottle, whose assembly is facilitated with respect to the known-type technical caps illustrated above.

[0017] Another object of the finding is to obtain a cap for bottles for fizzy wine or sparkling wine refermented in the bottle, whose production costs are relatively reduced. The task and the objects according to the present finding are achieved by a technical cap for bottles for fizzy wine or sparkling wine refermented in the bottle, comprising:

[0018] - a capsule, inside which a first cavity is defined, having an at least partially substantially cylindrical conformation, comprising a first lateral surface in which there is a first access opening, in fluid communication with a substantially cylindrical chamber of said capsule, designed to accommodate an open end of the neck of a bottle and to be hermetically fixed to the same by hermetic fixing means of such technical cap, the first cavity being also accessible through a, substantially cylindrical, access hole, obtained coaxially with the first cavity;

[0019] - a shutter, inserted into the first cavity through the access hole in such a way as to hermetically close this latter, wherein the shutter comprises an operating portion comprising a second lateral surface, facing the first lateral surface of the first cavity, in which a second access opening to a second cavity, obtained inside the shutter, is obtained, wherein the shutter is rotatable inside the first cavity, around a medium cylindrical axis of said first cavity, between a collection position, in which the second access opening faces the first access opening, and a storage position, in which the second access opening faces a first closed region of the first lateral surface of the first cavity, so as to be hermetically closed by it, and a second closed region of the second lateral surface faces the first access opening, so as to hermetically close it.

[0020] Other advantageous features of the finding are reported in the dependent claims.

[0021] The features and advantages of the present finding will be more apparent from the following exemplary and non-limiting description, referred to the attached schematic drawings, in which:

[0022] - Figure 1 is a front view of a bottle with a technical cap applied according to the finding, and of a tool for its operation;

[0023] - Figure 2 is an axonometric view of the bottle of Figure 1;

[0024] - Figure 3 is an exploded axonometric view of part of the neck of the bottle and of the cap of Figure 1;

[0025] - Figure 4 is a sectional view of the components of Figure 3, sectioned according to section plane I- I of Figure 1;

[0026] - Figure 5 is an axonometric view of the shutter of the technical cap illustrated in the previous figures ;

[0027] - Figure 6 is an axonometric sectional view, sectioned according to section plane I-I of Figure 1, of part of the neck of the bottle of Figure 1, with a cap applied according to the finding, with the shutter rotated as in Figure 5;

[0028] - Figure 7 is an axonometric view of the shutter of Figure 5, rotated to a different position;

[0029] - Figure 8 is an axonometric sectional view, sectioned according to section plane I-I of Figure 1, of part of the neck of the bottle of Figure 1, with a cap applied according to the finding, with -1- the shutter rotated as in Figure 7, in which an element was not represented;

[0030] - Figure 9 is an axonometric view of the shutter of Figure 5, rotated to a different position;

[0031] - Figure 10 is an axonometric sectional view, sectioned according to section plane I-I of Figure 1, of part of the neck of the bottle of Figure 1, with a cap applied according to the finding, with the shutter rotated as in Figure 9;

[0032] - Figure 11 is an axonometric sectional view, sectioned according to section plane II-II of Figure 1, of part of the neck of the bottle of Figure 1, with a cap applied according to the finding, with the shutter rotated as in Figure 5;

[0033] - Figure 12 is a plan view of Figure 11.

[0034] With reference to the attached figures, a technical cap 1 for bottles 2 for fizzy wine or sparkling wine refermented in the bottle is indicated overall by number 1.

[0035] The technical cap 1 comprises a capsule 3, preferably having a substantially cylindrical or substantially truncated-conical conformation, or which may be enclosed within a substantially cylindrical or substantially truncated-conical envelope .

[0036] It is emphasized that, in the present text, the expression "substantially cylindrical" means regular cylindrical, or differing from a regular cylinder by minor details, such as for example an imperfect orthogonality between the bases and the axis of the cylinder, an imperfect circularity and / or mutual parallelism of the bases, an imperfect regularity of the lateral surface, etc.

[0037] Similarly, in the present text, the expression "substantially truncated-conical" means regular truncated-conical, or differing from a regular truncated cone by minor details, such as for example an imperfect orthogonality between the bases and the axis of the truncated cone, an imperfect circularity and / or mutual parallelism of the bases, an imperfect regularity of the lateral surface, etc.

[0038] Advantageously, the capsule 3 is made of plastic or composite material.

[0039] Inside the capsule 3, a first cavity 4 is defined, having an at least partially (preferably totally) substantially cylindrical conformation, comprising a first lateral surface 5, in which there is a first access opening 6, preferably but not necessarily having a circular or elliptical plan, in fluid communication with a substantially cylindrical chamber 7 of the capsule 3, designed to accommodate an open end 8 of the neck 9 of a bottle 2 and to be hermetically fixed to the same by hermetic fixing means of the technical cap 1.

[0040] Advantageously, the substantially cylindrical chamber 7 can be directly connected to the first access opening 6, or, as in the attached figures, be joined thereto by a joining zone 40; in the advantageous case where the plan section of the substantially cylindrical chamber 7 is larger than the plan section of the first access opening 6, the joining zone 40 preferably has a funnel-shaped conformation, so as to promote the input of any yeasts from the substantially cylindrical chamber 7 to the first access opening 6.

[0041] Advantageously, the substantially cylindrical chamber 7 is oriented in such a way that the medium cylindrical axis 15 of the first cavity 4 and the medium cylindrical axis 7a of the substantially cylindrical chamber 7 are substantially orthogonal to each other.

[0042] It is emphasized that, in the present text, the expression "substantially orthogonal" means orthogonal, or differing from the orthogonality condition by an angle of less than 5 degrees.

[0043] In advantageous embodiments, such as for example that illustrated in the attached figures, the hermetic fixing means comprise a thread 10, provided on the inner wall 11 of the substantially cylindrical chamber 7 and configured to be screwed to a dedicated counter-thread 12 present at the open end 8 of the neck 9 of a bottle 2.

[0044] Advantageously, the hermetic fixing means include a first annular seal 13, preferably overinjected to the inner wall 11 of the substantially cylindrical chamber 7, positioned in such a way as to be interposed between the open end 8 of the neck 9 of a bottle 2 and a portion 7b of the substantially cylindrical chamber 7, which surrounds the first access opening 6, when such a bottle 2 is arranged with such open end 8 inside the substantially cylindrical chamber 7.

[0045] According to the finding, the first cavity 4 is also accessible through a, substantially cylindrical, access hole 14, obtained coaxially with the first cavity 4; it is emphasized that the expression "obtained coaxially with the first cavity" means that the hole 14 extends, starting from its input region 14a, according to a direction coinciding with the medium cylindrical axis 15 of the first cavity 4, so that such a medium cylindrical axis 15 coincides with the medium axis of the hole 14.

[0046] The technical cap 1 also comprises a shutter

[0047] 16, inserted into the first cavity 4 through the access hole 14, in such a way as to hermetically close this latter.

[0048] Advantageously, the shutter 16 is made of plastic or composite material.

[0049] The shutter 16 comprises an operating portion

[0050] 17, comprising a second lateral surface 18, facing the first lateral surface 5 of the first cavity 4.

[0051] Advantageously, the operating portion 17 has a substantially cylindrical conformation.

[0052] In the operating portion 17, a second access opening 19 to a second cavity 20, obtained inside the shutter 16, is obtained.

[0053] Advantageously, but not necessarily, the access opening 19 has a circular conformation.

[0054] Advantageously, but not necessarily, the second cavity 20 has a substantially cylindrical or substantially truncated-conical conformation.

[0055] The shutter 16 is rotatable inside the first cavity 4, around the medium cylindrical axis 15 thereof, between a collection position, illustrated for example in Figures 3, 4, 5, 6, 11, 12, in which the second access opening 19 faces the first access opening 6, and a storage position, illustrated for example in Figures 9 and 10, in which the second access opening 19 faces a first closed region 21 of the first lateral surface 5 of the first cavity 4, so as to be hermetically closed by it, and a second closed region 22 of the second lateral surface 18 faces the first access opening 6, so as to hermetically close it.

[0056] In an advantageous embodiment, such as that illustrated in the attached figures, the second access opening 19 is counter-shaped to the first access opening 6, so that, with the shutter 16 in the collection position, the second access opening 19 and the first access opening 6 are continuous to each other (with the possible interposition of a small gap or clearance) .

[0057] In other advantageous embodiments, not illustrated, the second access opening 19 has larger plan dimensions than those of the first access opening 6, and such that, with the shutter 16 in the collection position, the (liquid or solid) material passing through the first access opening 6, coming from the substantially cylindrical chamber 7, enters directly and completely into the second access opening 19.

[0058] Advantageously, the shutter 16 comprises a closing portion 23, having an at least partially substantially cylindrical conformation and axially aligned with the operating portion 17, with respect to which is fixed (i.e., it neither rotates nor translates with respect to it) .

[0059] Advantageously, the closing portion 23 is obtained as a single piece with the operating portion 17.

[0060] Advantageously, the closing portion 23 is inserted in and fixed to the access hole 14 in such a way as to hermetically close it and to be able to be rotated inside such an access hole 14, around the medium cylindrical axis 15 of the first cavity 4.

[0061] In an advantageous embodiment, such as for example that illustrated in the attached figures, the closing portion 23 is fixed in the access hole 14 by snap fastening means.

[0062] Such snap fastening means preferably comprise an annular appendage 24, protruding radially and externally from an external lateral surface 25 of the closing portion 23, which is inserted into a seat 26, obtained in the internal lateral surface 27 of the access hole 14, and maintained therein by elastic appendages 28 protruding radially from the internal lateral surface 27 of the access hole 14, towards the inside thereof.

[0063] In advantageous embodiments, such as for example that illustrated in the attached figures, the seat 26 is defined by two or more through slots 29, obtained, preferably in diametrically opposite positions, on the capsule 3, in the proximity of the input region 14a of the access hole 14, and communicating with this latter.

[0064] Advantageously, the two or more through slots 29 also delimit the elastic appendages 28, which, in this advantageous embodiment, are the edges of such through slots 29, facing the input region 14a of the access hole 14; preferably, in such advantageous embodiment, the material or materials of which the capsule 3 is made allow the elastic deformability of such elastic appendages 28.

[0065] Advantageously, the annular appendage 24 has an inclined surface 30, which extends away from the external lateral surface 25 of the closing portion 23 as it extends on the opposite side with respect to the operating portion 17.

[0066] During the insertion of the shutter 16 into the first cavity 4, said inclined surface 30 contacts the elastic appendages 28, pushing them towards the outside of the capsule 3 and allowing the annular appendage 24 to be positioned in the seat 26, from which it cannot be subsequently extracted (unless the elastic appendages 28 break or the bending is forced towards the outside thereof, for example, by a screwdriver) due to the interference between the region of such annular appendage 24, on the opposite side with respect to the inclined surface 30, and the elastic appendages 28; in such condition, the shutter 16 is permanently fixed in the first cavity 4, and can however rotate with respect to the latter around the medium cylindrical axis 15 thereof.

[0067] Advantageously, the closing portion 23 comprises first sealing means suitable for achieving a hermetic coupling between the closing portion 23 and the internal lateral surface 27 of the access hole 14.

[0068] Preferably, such a first sealing means comprise a second annular seal 31, protruding radially from the closing portion 23, in such a way as to engage with the internal lateral surface 27 of the access hole 14, making a hermetic seal therewith. Preferably, such a second annular seal 31 is over-injected to the external lateral surface 25 of the closing portion 23.

[0069] Advantageously, the shutter 16 comprises second sealing means suitable for achieving a hermetic coupling between the second lateral surface 18 of said shutter 16 and the first lateral surface 5 of the first cavity 4, at least in the storage position.

[0070] In advantageous embodiments, such as that illustrated in the attached figures, the second sealing means comprise one or more surface seals 32, which constitute, totally or partially, the second lateral surface 18 of the operating portion 17, at least at the edge of the second access opening 19 and the second closed region 22 of such a second lateral surface 18.

[0071] In the advantageous embodiment illustrated in the attached figures, the one or more surface seals 32 are two, spaced apart from each other, each extending over a certain angle of the second lateral surface 18; in other advantageous embodiments, not illustrated, the entire second lateral surface 18 of the operating portion 17 is constituted by a single surface seal.

[0072] In an advantageous embodiment, such as for example the one illustrated in the attached figures, the one or more surface seals 32 are deposited on the operating portion 17 by means of over-in ection.

[0073] In an advantageous embodiment, such as for example the one illustrated in the attached figures, the one or more surface seals 32 are obtained as a single piece with the second annular seal 31, preferably by means of co-inj ection .

[0074] Advantageously, the shutter 16 comprises coupling means 34, accessible from the outside of the technical cap 1, suitable for coupling with an external tool 33 to allow, by acting on said external tool 33, the rotation of the shutter 16 between the collection position and the storage position.

[0075] In preferred embodiments, the coupling means 34 comprise a third cavity 34a, obtained in an external face 35 of the closing portion 23, accessible from the outside of the access hole 14, and shaped so as to allow the external tool 33 to be inserted thereinto .

[0076] Preferably, the third cavity 34a has a hexagonal plan, so as to allow an external tool 33, such as a hex key 33a, to be inserted thereinto.

[0077] Alternatively, the third cavity 34a can have a rectilinear, or cross-shaped, plan or another shape suitable for being coupled with an external tool 33, such as a screwdriver or a Torx key.

[0078] In advantageous embodiments, such as that illustrated in the attached figures, the technical cap 1 comprises centering means of the shutter 16 in the first cavity 4.

[0079] Advantageously, such centering means comprise a rotation pin 36, having a substantially cylindrical shape, preferably but not necessarily hollow, protruding from the operating portion 17, on the opposite side with respect to the closing portion 23, and axially aligned with the operating portion 17, and a cylindrical seat 37, having a closed bottom 38, obtained in the capsule 3, starting from the first cavity 4, and aligned axially thereto, on the opposite side with respect to the first access opening 6, in which the rotation pin 36 is housed.

[0080] Advantageously, positioning the rotation pin 36 in the cylindrical seat 37 maintains the shutter 16 centered in the first cavity 14, allowing the rotation thereof.

[0081] An advantageous example of the operation of the technical cap 1 according to the finding is described belo .

[0082] After pouring a wine to be subjected to refermentation in bottle in a bottle 2, the technical cap 1 is applied to close such bottle 2, by inserting the open end 8 of the neck 9 thereof into the substantially cylindrical chamber 7 of the capsule 3; the hermetic fixing means of the technical cap 1 ensure the fixing of such open end 8 in the substantially cylindrical chamber 7.

[0083] With the shutter 16 in the collection position thereof, the bottle 2 is then advantageously rotated until being arranged with its medium longitudinal axis oriented substantially horizontally, and maintained in such position until the end of the ref ermentation .

[0084] Still with the shutter 16 in the collection position thereof, the bottle 2 is then advantageously subjected to a first rotation, either constant or periodic, to bring it, within a desired time, to a desired angle with the technical cap 1 facing downwards; simultaneously, the bottle 2 is advantageously subjected to a second rotation, either constant or periodic, around its medium longitudinal axis.

[0085] During the first and second rotation of the bottle 2, by effect of such rotations and gravity, the yeasts and their precipitates descend towards the technical cap 1, enter the substantially cylindrical chamber 7, pass through the first access opening 6 and the second access opening 19 facing it, and are finally deposited in the second cavity 20 of the shutter 16.

[0086] After a desired time, which depends on oenological requirements, it is possible, for example, by using an external tool 33 that couples with the coupling means 34, to rotate the shutter 16 in order to bring it from the collection position to the storage position thereof.

[0087] Once the shutter 16 is in the storage position thereof, the yeasts contained in its second cavity 20 cannot come out from the same and return into the bottle, since, in the storage position, the second access opening 19 faces the first closed region 21 of the first lateral surface 5 of the first cavity 4, which hermetically recloses said second access opening 19, and the second closed region 22 of the second lateral surface 18 faces the first access opening 6, hermetically reclosing such first access opening 6.

[0088] Once the shutter 6 is in the storage position thereof, the bottle 2 can be turned to the desired position and / or transported without the risk that the yeasts contained in the technical cap 1 return into the wine .

[0089] The technical cap 1 can then remain applied to the bottle 2 until it needs to be uncapped in order to allow the consumption of the wine.

[0090] Advantageously, once the shutter 6 is in the storage position, a protective enclosure, not illustrated, can be applied, for example, made of metal foil, plastic, or composite material, which covers and completely encloses the technical cap 1 and part of the neck region 9 of the bottle 2 contiguous to such technical cap 1, thereby protecting such technical cap 1 from possible tampering or unintentional opening.

[0091] Therefore, it has been observed that the finding achieves the task and objects stated above, as the technical cap according to the finding allows the yeasts and their precipitates to be removed from the wine by a decantation process, without needing to uncap the bottle after the first application of said technical cap; furthermore, the technical cap according to the finding, with the shutter in the storage position, due to the hermetic closure of both the first access opening on the capsule and the second access opening on the shutter, provides two hermetic sealing zones, arranged one after the other, which the yeasts and precipitates would have to pass in order to return from the second cavity inside of the bottle, which makes the hermetic isolation of such a second cavity better than the sealing achieved by the single hemispherical valve present in the cited prior art. The risk that yeasts and precipitates, once removed, return into the wine is therefore significantly reduced with respect to the cited prior art. Furthermore, assembling the technical cap according to the finding is very easy, as it simply involves inserting the shutter into the first cavity of the capsule until hermetically closing the access hole.

[0092] Again, the technical cap according to the finding is structurally simple and easy to make, and consequently has relatively low production costs. Finally, it is clear that the technical cap according to the finding, described here, is susceptible to numerous modifications or variants, all falling within the finding; furthermore, all details are replaceable by technically equivalent elements without departing from the scope of the appended claims.

Claims

CLAIMS1) Technical cap (1) for bottles (2) for fizzy wine or sparkling wine refermented in bottle, characterized by comprising:- a capsule (3) inside which a first cavity (4) is defined, having an at least partially substantially cylindrical conformation, comprising a first lateral surface (5) in which there is a first access opening (6) in fluid communication with a substantially cylindrical chamber (7) of said capsule (3) designed to accommodate an open end (8) of the neck (9) of a bottle (2) and to be hermetically fixed to the same by hermetic fixing means (10, 13) of said technical cap (1) , said first cavity (4) being also accessible through a, substantially cylindrical, access hole (14) , obtained coaxially with said first cavity (4) ;- a shutter (16) , inserted into said first cavity (4) through said access hole (14) in such a way as to hermetically close the latter, wherein said shutter (16) comprises an operating portion (17) comprising a second lateral surface (18) , facing said first lateral surface (5) of said first cavity (4) , wherein a second access opening (19) to a second cavity (20) obtained inside said shutter (16) is obtained, wherein said shutter (16) is rotatable inside said first cavity (4) , around a medium cylindrical axis (15) of said first cavity (4) , between a collection position thereof, in which said second access opening (19) faces said first access opening (6) , and a storage position thereof, in which said second access opening (19) faces afirst closed region (21) of said first lateral surface (5) of said first cavity (4) , so as to be hermetically closed by it, and a second closed region (22) of said second lateral surface (18) faces said first access opening (6) , so as to hermetically close it .2) Technical cap (1) , as in claim 1, wherein said shutter (16) comprises a closing portion (23) , having an at least partially substantially cylindrical conformation and axially aligned with said operating portion (17) , with respect to which is fixed, said closing portion (23) being inserted in and fixed to said access hole (14) so as to hermetically close it and to be able to be rotated inside said access hole (14) around said medium cylindrical axis (15) of said first cavity (4) .3) Technical cap (1) , as in claim 2, wherein said closing portion (23) is fixed in said access hole (14) by means of snap fastening means (24, 26, 28) .4) Technical cap (1) , as in claim 3, wherein said snap fastening means (24, 26, 28) comprise an annular appendage (24) protruding radially and externally from an external lateral surface (25) of said closing portion (23) , said annular appendage (24) being inserted into a seat (26) , obtained in an internal lateral surface (27) of said access hole (14) , and maintained in said seat (26) by elastic appendages (28) protruding radially from said internal lateral surface (27) of said access hole (14) towards the inside thereof.5) Technical cap (1) , as in claim 2 or 3 or 4,-' ' - wherein said closing portion (23) comprises first sealing means (31) suitable for achieving a hermetic coupling of said closing portion (23) with an internal lateral surface (27) of said access hole (14) .6) Technical cap (1) , as in one of the previous claims, wherein said shutter (16) comprises second sealing means (32) suitable for achieving a hermetic coupling between said second lateral surface (18) of said shutter (16) and said first lateral surface (5) of said first cavity (4) at least in said storage position .7) Technical cap (1) , as in claim 6, wherein said second sealing means (32) comprise one or more surface seals (32) which constitute, totally or partially, said second lateral surface (18) of said operating portion (17) , at least at an edge of said second access opening (19) and at said second closed region (22) of said second lateral surface (18) .8) Technical cap (1) , as in one of the previous claims, wherein said shutter (16) comprises coupling means (34) , accessible from the outside of said technical cap (1) , suitable for coupling with an external tool (33) to allow, by acting on said external tool (33) , the rotation of said shutter (16) between said collection position and said storage position.9) Technical cap (1) , as in one of the previous claims, comprising centering means (36, 37) of said shutter (16) in said first cavity (4) .10) Technical cap (1) , as in claim 9, wherein said centering means (36, 37) comprise a rotationpin (36) , with a substantially cylindrical shape, protruding from said operating portion (17) on the opposite side with respect to said closing portion (23) and axially aligned with said operating portion (17) , and a cylindrical seat (37) obtained in said capsule (3) starting from said first cavity (4) and aligned axially thereto, on the opposite side with respect to said first access opening (6) in which said rotation pin (36) is housed.

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