WO2014197959A1

WO2014197959A1 - Closure device for cans

Info

Publication number: WO2014197959A1
Application number: PCT/BR2014/000193
Authority: WO
Inventors: Antonio Carlos Teixeira ÀLVARES; Silvério Cândido DA CUNHA
Original assignee: Brasilata S/A Embalagens Metálicas
Priority date: 2013-06-11
Filing date: 2014-06-11
Publication date: 2014-12-18
Also published as: AR096562A1; BR102013014544A2

Abstract

A can (10) presents an opening (A) provided in an upper wall (1) and defining a retaining seat (13). The device comprises: a sealing seat (20) locked in the retaining seat (13) and provided with an inner locking thread (24a) and with a stop means (25); a pouring spout (30) having an upper end (33) externally provided with a closing thread (33a) and with a retaining means (34) and being displaced between an inoperative position, with the retaining means (34) seated on the stop means (25), and an operative position, with the upper end (33) projecting outwardly from the can (10), and with the lower end (32) locked in the stop means (25); and a lid (40) having an inner cylindrical surface (43), provided with an inner thread (43a), to be engaged with the closing thread (33a) of the pouring spout (30); and an outer cylindrical surface (44) provided with an outer thread (44a), to be engaged with the locking thread (24a) of the sealing seat (20).

Description

"CLOSURE DEVICE FOR CANS"

Field of the Invention

The present invention refers to a closure device for cans in general and, more particularly, for cans which present an access end face closed by an upper wall, peripherally double seamed in the lateral wall(s) of the can and provided with a small discharge opening, the closure device comprising a lid, optionally constructed in a transparent material and to be removably and axially locked in said small discharge opening, in order to provide the hermetic closure of the latter and its opening upon the need to discharge the stored product, and a pouring spout to be axially displaced, jointly with the lid, between an inoperative position, retracted in the interior of the can, and an operative position, projecting outwardly from the can. ^■ Prior Art

The cans of the type considered herein are usually those described in patents EP1660380 and EP1879801, of the same applicant and which comprise a tubular body formed by one or more peripheral lateral walls, in whose lower edge is double seamed or otherwise incorporated a bottom wall, and whose upper edge is double seamed or otherwise affixed to the outer peripheral edge of an annular upper wall, having an inner peripheral edge which defines a median opening to access the interior of the can and in which is defined a seat for the seating of a removable lid which may be formed in plastic material or metallic alloy.

In said known constructions, the annular upper wall of the can usually incorporates, in its inner peripheral edge, a rib obtained by bending the metallic sheet, which rib may assume different cross sections, but generally defining a circumferential seat having a cross section at least partially circular and which works as a seating seat for a lid to close the upper opening of the can. Although said known prior solutions allow using a dosing lid which is easy to fit and remove, said constructions present problems regarding hermeticity, allowing leakage of the product to occur, usually liquids contained inside the can, as well as evaporation of gases which may be formed in the interior of said can, as is the case of the cans filled with solvents or other volatile products.

Such problems are even more aggravated with the occurrence of: difference of constructive adjustment and in the finishing of the parts of upper lid and can; different materials used for building the upper wall of the can and the lid; deformation of least one of the parts of lid and upper wall of the can, or caused by differences of thermal expansion.

Another deficiency of the previous solutions refers to the construction of can and pouring lid which, while allowing the adequate outflow of the product, as in the case of patent EP1879801, makes difficult the storage of the can, both for the manufacturer and for the filler, and even for the end user, due to the fact that the lid of said prior solution projects beyond the plane that contains the upper edge of the can.

There are also known the constructions in which the lid of the can is threaded in the outer end of a retractable pouring spout, formed in plastic material and having an inner end extending upwardly, in order to be incorporated, in a single piece, to a sealing seat formed in the same material of both the spout and the lid and which is hermetically fitted and locked in a corresponding upper opening of the can.

Although allowing the displacement of the pouring spout between the retracted position and a position projecting outwardly from the can, said pouring spout constructed in a single piece with the sealing seat presents the inconvenience of requiring the pouring spout to be built in a flexible material, for allowing its progressive winding and unwinding during the displacement of the spout between the retracted and projecting positions thereof.

However, the required flexibility of the material that forms the pouring spout demands the use of a plastic material necessarily having a reduced thickness, which proves to be insufficient to guarantee the necessary hermeticity for the closure of the can when it contains volatile products that form vapors and gases in the interior thereof. The reduced thickness of the plastic material allows the vapors or gases, contained in the interior of the can, to progressively migrate to the outside of the latter with time, said known solution being inadequate for the closure of cans containing volatile products.

Summary of the Invention

Thus, it is an object of the present invention to provide a closure device to be applied in metallic cans, to be filled with volatile products and comprising a lid to be removably and axially locked in a small discharge opening of the can, in order to provide the hermetic closure and opening thereof, and a pouring spout to be axially displaced, jointly with the lid, between an inoperative position, retracted in the interior of the can, and an operative position, projecting outwardly from the can, in order to facilitate the storage of the can in manufacturing and filling sites and by the end user, without impairing the total tightness of the can during the long storage of the filled product.

A further object of the present invention is to provide a closure device, as defined above, which guarantees the adequate and reliable operation of the lid, regardless of occurrences, such as differences of thermal expansion between said parts of lid and can, possible deformations in one or in both parts, and differences in the materials used to build said parts. These and other objectives of the present invention are achieved through a closure device for cans, having an upper wall provided with an inner peripheral edge surrounding the opening and defining a retaining seat. According to the invention, the device comprises: an annular sealing seat, formed in polymeric material and presenting an outer peripheral face seated and axially tightly locked in the retaining seat, and an inner peripheral face provided with a locking thread and, below the latter, with a stop means radially inwardly projecting; a pouring spout, having a cylindrical lateral wall, an upper end, externally provided with a closing thread and, below the latter, with a radially projecting retaining means, the pouring spout being displaced, in the interior of the sealing seat, between an inoperative position, with the retaining means seated on the stop means, and an operative position, in which the upper end projects outwardly from the can and the lower end is axially locked in the stop means; and a lid comprising an upper wall which incorporates a lower tubular projection defining: an inner cylindrical surface, provided with an inner thread, to be engaged with the closing thread of the pouring spout, in order to close the upper end of the latter; and an outer cylindrical surface provided with an outer thread, to be engaged with the locking thread of the sealing seat upon displacement of the lid-pouring spout assembly to the inoperative position.

The provision of the sealing seat in polymeric material, with a certain capacity of elastic deformation and comprising axial locking means, which are hermetic in relation to the opening provided in the upper wall of the can, and means for retaining, also in a reliable and hermetic manner, a removable lid and a retractable pouring spout, allows providing a discharge opening in said type of can which may be maintained safely closed, guaranteeing a complete tightness of the interior of the can, even when said can contains liquid products, particularly volatile products, as well as the provision of a pouring spout which allows for a safe and targeted outflow of the stored product, without impairing the tightness of the can and the stacking thereof.

Brief Description of the Drawings

The invention will be described below, making reference to the appended drawings, given by way of example of a possible construction for the present closure device for cans, and in which:

Figures 1, 2 and 3 represent partially cut upper perspective views of a can design provided with the present closure device in the respective following conditions: closed lid and retracted pouring spout; pouring spout projecting outwardly from the can and still closed by the lid; and pouring spout projecting outwardly from and from which the lid has been removed, using a first embodiment for the retaining seat;

Figures 4A, 4B and 4C represent partial vertical sectional views: of the sealing seat mounted in a second embodiment of the retaining seat; of the pouring spout; and of the lid, respectively;

Figure 5 represents a partial median vertical sectional view of the can illustrated in figure 1, but using the second embodiment of the retaining seat, said section diametrically cutting the closure device of the cans; Figure 5A represents an enlarged . detail of part of figure 5;

Figure 6 represents a partial median vertical sectional view of the can illustrated in figure 2, but using the second embodiment of the retaining seat, said section diametrically cutting the closure device;

Figure 6A represents an enlarged detail of part of figure 6;

Figure 7 represents a partial median vertical sectional view of the can illustrated in figure 3, but using the second embodiment of the retaining seat, said section diametrically cutting the closure device, and further illustrating the lid in an exploded condition:

Figure 8 represents a view similar to that of figure 5, but illustrating the upper wall of the can provided with the first embodi.ment of the retaining seat used in figures 1 to 3; and

Figure 8A represents an enlarged detail of part of figure 8.

Description of the Invention

As illustrated ih the figures of the appended drawings, the present invention is applied to a can 10 formed ^'(-in metallic sheet, usually tin plate and having an access end face closed by an upper wall 11 provided with ¾an inner peripheral edge 12 surrounding an opening A for product discharge and defining a retaining seat 13, in the illustrated embodiment, the upper wall 11 being peripherally double seamed in the lateral walls 14 of the can, which is usually closed by a bottom wall (not illustrated) , preferably double seamed in the lateral walls 14.

The closure device of the invention comprises a sealing seat 20, of annular shape, formed in an adequate polymeric or elastomeric material having a certain capacity of elastic deformation and presenting an annular upper face 21, an annular lower face 22, provided with a plurality of teeth 22a, an outer peripheral face 23 which is seated and axially tightly locked in the retaining seat 13, and an inner peripheral face 24 provided with a locking thread 24a and, below the latter, with a stop means 25 projecting radially inwardly. The locking thread 24a ends in an inner annular step 28, positioned immediately above the stop means 25.

In the preferred construction illustrated, the stop means 25 is defined by an annular projection 26 incorporated to the inner peripheral face 24 of the sealing seat 20 and presenting an annular upper face 26a and an annular lower face 26b.

In both constructive forms illustrated in the drawings, the sealing seat 20 presents a circumferential recess 27 in its outer peripheral face 23.

In the embodiment illustrated in figures 4A, 4B, 4C, 5, 5A, 6, 6A and 7, the retaining seat 13 takes the form of a tubular curl 13a, formed by bending the inner peripheral edge 12 in the opening A and positioned on a plane downwardly retracted in relation to the plane of the upper wall 11 of the can 10. The tubular curl 13a presents a cross section in convex arc, so as to be hermetically fitted and axially retained in the interior of the circumferential recess 27 of the sealing seat 20.

In the embodiment illustrated in figures 1, 2, 3, 8 and 8A, the retaining seat 13 takes the form of a tubular skirt 13b formed by bending the inner peripheral edge 12 in the opening A and disposed above the plane of the upper wall 11 of the can. The tubular skirt 13b is hermetically fitted and axially retained in the interior of the circumferential recess 27 of the sealing seat 20.

In both embodiments illustrated, the sealing seat 20 incorporates, superiorly, a peripheral flange 29 seated on the region of the upper face 11 of the can 10 defined around the retaining seat 13, said seating and the fitting of the circumferential recess 27 on the retaining seat 13 being sufficient to provide a reliable axial and rotational retention of the sealing seat 20 in relation to the retaining seat 13 of the upper wall 11 of the can 10.

The closure device further comprises a pouring spout 30 constructed in any adequate material, being preferably molded in polymer or elastomer presenting a certain rigidity associated with a certain degree of elastic deformability and having a cylindrical lateral wall 31, a lower end 32 and an upper end 33 externally provided with a closing thread 33a and, below the latter, with a radially projecting retaining means 34. The cylindrical lateral wall 31 of the pouring spout 30 is fitted, in a tight and axially sliding way, through the stop means 25 of the sealing seat 20.

The pouring spout 30, having its lower end 32 and upper end 33 open, is displaced, in the interior of the sealing seat 20, between an inoperative position, with the retaining means 34 being seated on the stop means 25, and an operative position, in which the upper end 33 projects outwardly from the can 10 and the lower end 32 is axially locked in the stop means 25. The present closure device further includes a lid 40 comprising an upper wall 41 which incorporates a lower tubular projection .42 defining: a free end edge 42a; an inner cylindrical surface 43, provided with an inner thread 43a, to be engaged with the closing thread 33a of the pouring spout 30, in order to close the upper end 33 of the latter; and an outer cylindrical surface 44, provided with an outer thread 44a, to be engaged with the locking thread 24a of the sealing seat 20 upon displacement of the lid-pouring spout assembly to the inoperative position. The lid 40 may also be obtained in any adequate material, however it is usually preferred to produce it in polymer or elastomer appropriate for the intended purpose.

In the constructions illustrated in the drawings, the pouring spout 30 has its lower end 32 provided, externally, with a limiting means 35 and, axially retracted in relation to the latter, with a lower locking means 36, it being noted that, in the operative position of the pouring spout 30, the limiting means 35 is under the stop means 25 and the lower locking means 36 is seated on the stop means 25. With such arrangement, the pouring spout 30 is stabilized at its operative position, in which it projects outwardly from the can 10, with its lower end 32 fitted, in a tight and axially locked manner, around the stop means 25 of the sealing seat 20. As described hereinafter, the stop means 25, the lower locking means 36 and the limiting means 35 are configured to provide a tight mutual fitting sufficient to guarantee the stability of the pouring spout 30 in the operative condition, and also the tightness between the lower end 32 of the latter and the stop 25 of the sealing seat 25.

In order to allow for the pouring spout 30 to be rotatively locked to the sealing seat 20, when taken to its operative position, the limiting means 35 of the pouring spout 30 is provided with at least one upper indentation 35a which is engaged by a tooth 22a of the sealing seat 20 when the pouring spout 30 is found in the operative position illustrated in figures 6 and 6A. Thus, after the pouring spout 30 is manually displaced to its operative position, with the lid 40 still closing its upper end 33, said lid 40 may be unthreaded from the pouring spout 30, while the latter remains rotatively locked in the sealing seat 20. The lid 40 may be re-threaded in the upper end 33 of the pouring spout 30, with the latter being still rotatively locked in the sealing seat 20. Subsequently, the pouring spout 30 may be axially displaced downwardly, carrying the lid 40, until reaching its retracted inoperative position, illustrated in figures 5, 5A, 8 and 8A. In the illustrated constructions, the limiting means 35 is in the form of an annular flange having an upper face 35b in which is provided at least one upper indentation 35a to be engaged and rotatively locked in a tooth 22a of the annular lower face 22 of the sealing seat 20. In order to guarantee a reliable tightness upon closing the upper end 33 of the pouring spout 30, the former presents an end edge 33b, the upper wall 41 of the lid 40 being tightly seated against said end edge 33b, upon threading the lid 40 on the upper end 33 of the pouring spout 30. Although not illustrated in the drawings, the lid 40 may carry, inferiorly and in the interior of the lower tubular projection 42, an annular gasket, not illustrated, made of any adequate material, such as for example, plastisol.

As it may be noted in figures 5 and 8, the retaining means 34 is defined by a rib 37 having an annular lower face 37b to be seated on the annular upper face 26a of the annular projection 26 of the sealing seat 20 when the pouring spout 30 is taken to its inoperative position. The seating of the retaining means 34 on the annular projection 26 of the sealing seat 20 defines a limit descending position of the pouring spout 30. When the pouring spout 30 is downwardly displaced, already carrying the lid 40 in its upper end 33, the lid 40 has its outer thread 44a meeting the locking thread 24a of the sealing seat 20. From this point on, the downward displacement of the lid 40-pouring spout 30 assembly is made by threading said outer thread 44a of the lid 40 in the locking thread 24a of the sealing seat 20, until the free end edge 42a of the lower tubular projection 42 of the lid 40 seats, tightly, on the inner annular step 28, guaranteeing the total tightness between the pouring spout 30 and the sealing seat 20.

As illustrated, the rib 37 of the retaining means 34 presents an annular upper face 37a inclined in a descending ramp, the annular lower face 26b of the annular projection 26 of the sealing seat 20 being provided with an end chamfer 26c in the form of an ascending ramp. Such constructive arrangement facilitates the pouring spout 30 to be ascendingly mounted in the interior of the sealing seat 20 during the passage of the retaining means 34 by the stop means 25. Similarly, the lower locking means 36 is defined by a frieze having a an upper face 36a and a lower face 36b shaped, as converging ramps, the lower face 36b being seated on the annular upper face 26a of the projection 26 of the stop means 25, when the pouring spout 30 is taken to its operative condition, axially and descendingly locking the latter in its operative position. In the illustrated construction, the lower locking means 36 and the limiting means 35 define, therebetween and with the cylindrical lateral wall 31 of the pouring spout 30, a circumferential channel CI presenting a cross section corresponding to the cross section of the stop means 25, in order to be tightly fitted on the latter, when the pouring spout 30 is taken to its operative position.

As illustrated in figures 6 and 7, the upper end 33 of the pouring spout 30 is further externally provided with an upper locking means 39, which is axially downwardly retracted in relation to the retaining means 34, in order to be seated under the stop means 25 when the pouring spout 30 is taken to its inoperative position. In the embodiment illustrated in figures 5, 6 and 7, the upper locking means 39 and the retaining means 34 define, therebetween and with the cylindrical lateral wall . 31 of the pouring spout 30, a circumferential channel CS presenting a cross section corresponding to the cross section of the stop means 25, in order to be tightly fitted on the latter when the pouring spout 30 is taken to its inoperative position, the upper locking means 39 being in the form of a frieze having an upper face 39a and a lower face 39b shaped as converging ramps, the upper face 39a of the upper locking means 39 being seated on the annular lower face 26b of the stop means 25 when the pouring spout 30 is taken to its inoperative condition. In the constructive form illustrated in figures 5, 5A, 6, 6A and 7, the stop means 25 has the annular upper face 26a and the annular lower face 26b shaped in a convex arc and defining, jointly, a semi-circular cross section for the stop means 25, the lower face 36b of the lower locking means 36, the upper face 39a of the upper locking means 39 and the lower face 37b of the rib 37 of the retaining means 34 being shaped in a concave arc, in order to define, in conjunction, a concave semi-circular cross section for the two circumferential channels CI, CS. In order to achieve the ascending displacement of the lid 40-pouring spout 30 assembly to the operative position, the lid 40 should be initially rotated in order to be unthreaded from the locking thread 24a of the sealing seat 20. In a possible construction to facilitate the rotation of both the lid 40 and the pouring spout 30, in order to release them from the locking thread 24a, the lid 40 may incorporate a pair of handles 50 which may be angularly displaced from a position coplanar to the upper wall 41 of the lid 40, to a raised position, which facilitates the user to grasp them. After liberating the pouring spout 30 and the lid 20 from the locking thread 24a of the sealing seat 20, the assembly may be then upwardly pulled, by means of the handles 50, until the limiting means 35 is seated and rotatively locked under the stop means 25 of the sealing seat 20, when the lower locking means 36 will be seated on the stop means 25, stabilizing the pouring spout 30 in the operative and rotatively locked position, for allowing the lid 40 to be easily unthreaded or re-threaded in the upper end 33 of the pouring spout 30.

While only two ways of carrying out the invention have been illustrated herein, it should be understood that changes as to the form and arrangement of the component parts can be made, without departing from the constructive concept defined in the claims that accompany the present specification.

Claims

1. A closure device for cans having an upper wall (11) provided in an inner peripheral edge (12) surrounding an opening (A) and defining a retaining seat (13) , said device being characterized in that it comprises:

- an annular sealing seat (20) formed inn polymeric material and presenting an outer peripheral face (23) , which is seated and tightly axially locked in the retaining seat (13), and an inner peripheral face (24) provided with a locking thread (24a) and, below the latter, with a stop means (25) radially inwardly proj ecting;

- a pouring spout (30), having a cylindrical lateral wall (31), a lower end (32) and an upper end (33), externally provided with a closing thread (33a) and, below the latter, with a radially projecting retaining means (34), the pouring spout (30) being displaced, in the interior of the sealing seat (20), between an inoperative position, with the retaining means (34) seated on the stop means (25), and an operative position, in which the upper end (33) projects outwardly from the can (10), and the lower end (32) is axially locked in the stop means (25); and

a lid (40) comprising an upper wall (41) which incorporates a lower tubular projection (42) defining: an inner cylindrical surface (43), provided with an inner thread (43a), to be engaged with the closing thread (33a) of the pouring spout (30), in order to close the upper end (33) of the latter; and an outer cylindrical surface (44), provided with an outer thread (44a) , to be engaged with the locking thread (24a) of the sealing seat (20) upon displacement of the lid- pouring spout assembly to the a inoperative position.

2. The device, according to claim 1, characterized in that the pouring spout (30) has its lower end (32) provided, externally, with a limiting means (35) and, axially spaced back in relation to the latter, with a lower locking means (36), the limiting means (35), in the operative position of the pouring spout (30) , being seated under the stop means (25) and the lower locking means (36) being seated on the stop means (35) .

3. The device, according to claim 2, characterized in that the sealing seat (20) has an annular lower face (22) provided with a plurality of teeth (22a), the limiting means (35) of the pouring spout (30) being provided with at least one upper indentation (35a) to be engaged by a tooth (22a) of the sealing seat (20) when the pouring spout (3.0) is in the operative position, rotatively locking the pouring spout (30) to the sealing seat (20).

4. The device, according to claim 3, characterized in that the limiting means (35) is in the form of an annular flange having an upper face (35b) in which is provided the at least one upper indentation (35a) to be engaged and rotatively locked in a tooth (22a) of the annular lower face (22) of the sealing seat (20).

5. The device, according to any one of claims 3 or 4, characterized in that the upper end (33) of the pouring spout (30) presents an end edge (33b), the upper wall (41) of the lid (40) being tightly seated against said end edge (33b) upon threading the lid (40) on the upper end (33) of the pouring spout (30), in order to close the latter.

6. The device, according to any one of claims 3 to 5, characterized in that the stop means (25) is defined by a an annular projection (26) incorporated to the inner peripheral face (24) of the sealing seat (20) and presenting an annular upper face (26a) and an annular lower face (26b), the retaining means (34) being defined by a rib (37) having an annular lower face (37b) to be seated onto the annular upper face (26a) of the annular projection (26) of the sealing seat (20), when the pouring spout (30) is taken to its inoperative position .

7. The device, according to claim 6, characterized in that the rib (37) of the retaining means (34) presents an annular upper face (37a) inclined in a descending ramp, the annular lower face (26b) of the annular projection (26) of the sealing seat (20) being provided with an end chamfer (26c) in the form of a descending ramp.

8. The device, according to claim 7, characterized in that the lower locking means (36) is defined by a frieze having an upper face (36a) and a lower face (36b) in the form of converging ramps (36b), the lower face being seated on the annular upper face (26a) of the projection (26) of the stop means (25) when the pouring spout (30) is taken to its operative condition, axially and descendingly locking the latter in its operative position.

9. The device, according to claim 8, characterized in that the lower locking means (36) and the limiting means (35) define, between each other and with the cylindrical lateral wall (31) of the pouring spout (30), a circumferential channel (CI) presenting a cross section corresponding to the cross section of the stop means (25), in order to be tightly fitted on the latter when the pouring spout (30) is taken to its operative position.

10. The device, according to claim 9, characterized in that the upper end (33) of the pouring spout (30) is further externally provided with an upper locking means (39) which is axially retracted downwardly, in relation to the retaining means (34), in order to be seated under the stop means (25) when the pouring spout (30) is taken to its inoperative position.

11. The device, according to claim 10, characterized in that the upper locking means (39) and the retaining means (34) define, therebetween, and with the cylindrical lateral wall (31) of the pouring spout (30), a circumferential channel (CS) presenting a cross section corresponding to the cross section of the stop means (25), in order to be tightly fitted on the latter when the pouring spout (30) is taken to its inoperative position, the upper locking means (39) being in the form of a frieze having an upper face (39a) and a lower face (39b) in the form of converging ramps, the upper face (39a) being seated on the annular lower face (26b) ■ of the stop means (25) when the pouring spout (30) is taken to its operative condition.

12. The device, according to claim 11, characterized in that the stop means (25) has its annular upper face (26a) and annular lower face (26b) in the form of a convex arc and defining, jointly, a semi-circular cross section for the stop means (25), the lower face (36b) of the lower locking means (36) , the upper face (39a) of the upper locking means (39) and the lower face (37b) of the rib (37) of the retaining means (34) being shaped in a concave arc, in order to define, jointly, a concave semi-circular cross section for the two circumferential channels (CI, CS) .

13. The device, according to any one of claims 1 to 12, characterized in that the locking thread (24a) ends in an inner annular step (28), positioned immediately above the stop means (25), the lower tubular projection (42) of the lid (40) defining a free end edge (42a) which is hermetically seated on the inner annular step (28) of the sealing seat (20), upon threading the lid (40) in the locking thread (24a) of the sealing seat (20) .

14. The device, according to any one of claims 1 to 13, characterized in that the cylindrical lateral wall (31) of the pouring spout (30) is fitted, in a tight and axially sliding way, through the stop means (25) of the sealing seat (20) .

15. The device, according to any one of claims 1 to 14, characterized in that the sealing seat (20) presents a circumferential _. recess (27) in its outer peripheral face (23), the retaining seat (13) taking the form of a tubular curl (13a) formed by bending the inner peripheral edge (12) in the opening (10), and positioned in a plane that is downwardly retracted in relation to the plane of the upper wall (11) of the can (10), said tubular curl (13a) presenting a cross section in the form of a convex arc to be hermetically fitted and axially retained in the interior of said circumferential recess (27).

16. The device, according to any one of claims 1 to 14, characterized in that the sealing seat (20) presents a circumferential recess (27) in its outer peripheral face (23), the retaining seat (13) taking the form of a tubular skirt (13b), formed by bending the inner peripheral edge (12) in the opening (A) and disposed above the plane of the upper wall (11) of the can (10), said tubular skirt (13b) being hermetically fitted and axially retained in the interior of said circumferential recess (27) of the sealing seat (20).

17. The device, according to any one of claims 15 and 16, characterized in that the sealing seat (20) incorporates, superiorly, a peripheral flange (28) to be seated on the region of the upper face (11) of the can (10) defined around the retaining seat (13).

18. The device, according to any one of claims 1 to 17, characterized in that the upper wall (41) of the lid (40) incorporates a pair of handles (50) to be angularly displaced from a position coplanar to the upper wall (41) of the lid (40) to a raised position, for the user to grasp them.