JP5356034B2 - Can closure composition - Google Patents

Description

  The present invention is a can closure structure obtained from sheet metal, in a cylindrical body closed below and carrying an annular upper wall, the annular upper wall defining the upper opening of the can And a single piece lid made of plastic material or sheet metal is removably seated therein and is configured to define a closure seat in the form of a convex arc that is held axially. The present invention relates to a closure structure of the type comprising a tubular body with an inner edge.

  The packaging required by a given product, such as a specific food product, can remain sealed for long-term storage and is a package that avoids air ingress and contamination and oxidation to the stored product .

  Apart from the above requirements, certain products, such as certain foods, are consumed little by little, so that the can lid can be reclosable so that the stored product is little by little. It needs to be able to be reclosed as many times as needed while being consumed, to ensure the sealing of the can and to protect the contents of the remaining can.

  Furthermore, in certain cases, apart from the tightness required for long-term storage and the feature of consuming little by little, the lid of the can does not require the use of aids or equipment such as keys, blade handles, etc. It can be easily opened and it is desirable that the initial opening of the can be achieved by breaking the tamper-evident seal.

  Known lids, which are press-fitted into a structural ring double-clamped to the upper edge of the side wall of the cylindrical body of the can, are themselves the tightness required to guarantee long-term storage In many cases, it is necessary to provide a sealed tamper-evident seal until the first opening. The seal is generally defined by aluminum foil or other suitable material that is double wound together with an annular upper wall at the upper edge of the can side wall.

  This known solution requires a tool for opening the lid as well as a tool for cutting the tamper-evident seal when the can is first opened.

  Also known from the prior art are lids constructed of sheet metal or plastic material, which are provided with circumferential grooves in the form of a concave arc whose section is generally bent outwards. In addition, it is seated on a closing seat provided on the inner peripheral edge of the annular upper wall of the tubular main body of the can and is held in the axial direction. The circumferential groove of the lid is seated on the closing seat in the form of a concave arc, thereby obtaining a sealed region that also functions as a region for holding the lid axially on the cylindrical body of the can. it can.

  The above-mentioned solution is described in the same applicant's Brazilian patent application No. 0203950-8, which provides a high degree of sealing in this sealed area and allows the lid to be safely axially attached to the cylindrical body of the can. The sealed area is a long-term release of certain foods, such as those that are produced in foods that are exported and that have water-containing characteristics and that readily oxidize when in contact with ambient air oxygen. It does not guarantee sufficient sealing to meet the storage requirements for the best-before period.

  Due to the limitations found in known structural solutions, the object of the present invention is a can closure arrangement which ensures a high degree of sealing for long term storage and without the use of specialized tools. It is to provide a can closure arrangement that guarantees the same degree of sealing until the first opening while guaranteeing ease of opening the lid and reclosing the lid by hand.

  A further object of the present invention is to provide a closure arrangement as described above, which leaves evidence of the first opening of the can.

Closed configuration of the present invention is applied to cans comprising a tubular body that is closed is created, and below the sheet Tometaru, tubular body, annular by a double seaming or deformation or any other fixation means the wall was carried on the annular top wall has an inner edge defining an upper opening of the can, inner edge, Ru is curved so as to define a closure seat in the form convex arc .

The closure component of the present invention further comprises a lid, the lid being generally formed in a single piece , comprising a base portion, a peripheral portion and an annular portion, the base portion covering the upper opening. sized to, peripheral portion in cross section is provided concave arc forms der Ru circumferential cradle, when the lid is seated on the upper opening of the can, fitted to the closure seat and closing seat sized to be retained axially relative to part, the annular portion protrudes from a peripheral portion radially outwardly, Ru is seated into the annular upper wall upon closure of the lid.

According to the present invention, at least one of the portions of the annular upper wall of the tubular body and the annular portion of the lid defines a respective annular sealing region between the lid and the tubular body when the lid is closed. as carries an annular gasket to be pressed by the other part, the tubular body is provided with a side wall upper edge portion is provided, the annular top wall radially of the circle formed by recesses in the side walls Defined by a circumferential rib, the radial circumferential rib protruding radially into the interior of the cylindrical body below the upper edge of the side wall, the upper edge of the side wall of the cylindrical body being above the side wall Curved outward, downward and then inward so as to define a cylindrical rib incorporated externally at the edge, the cylindrical rib extending downwardly beyond the radial circumferential rib and extending radially Cover the recesses that form the circumferential ribs.

Is generally positioned radially outwardly relative to the closure seat, by providing the second annular sealing region between the lid and the tubular body, when closing the lid against the tubular body of the can In addition, it becomes possible to reach a high degree of sealing.

The present invention is described below with reference to FIG. 9 attached here as an example of a possible structure of the present invention.

6 from FIG. 1a is closed above by a cover 20 that is created in a single piece of plastic material, comprising a can structure comprises a tubular body 10 of sheet metal, is closed chain configuration object the can The can structure provided is shown.

  As shown in the cross-sectional views of FIGS. 2 to 6, the cylindrical main body 10 that is generally cylindrical includes a side wall 11 having an upper edge portion 11a. It is closed below by a bottom wall (not shown) incorporated into the side wall 11 in part or double wrapping or other fastening method.

  2 to 6, the tubular body 10 of the can further includes an annular upper wall 12 attached to the upper edge 11 a of the side wall 11 by a double tightening 13 in the circumferential direction. 12 has an inner edge 12a that defines an upper opening A of the can and is generally curved upward and radially outward to have a cross-section in the form of a convex arc. A cylindrical rib 14 that defines the seat S is defined.

  As will be better understood in the description of the configuration shown in FIGS. 7a and 8a, the inner edge 12a of the annular upper wall 12 need not be curved to define the cylindrical rib 14, but the curvature described above. However, it is sufficient to form a closing seat S having a cross section in the form of a concave arc.

  The can shown in the partial cross-sectional views of FIGS. 2-6 further includes a lid 20 made of a single piece of plastic material such as polypropylene, the lid 20 being provided with a circumferential cradle 23, Generally comprising a base portion 21 carrying a peripheral portion 22 having a cylindrical outer surface 22a, the cross-section of the circumferential cradle 23 is in the form of a concave arc bent radially outwardly, which is When the lid 20 is seated in the upper opening A of the can, it is fitted into the closing seat S and is dimensioned so that it is held axially here. The lid 20 further comprises an annular portion 24 that projects radially outward from the peripheral portion 22 and is seated on the annular upper wall 12 when the tubular body 10 is closed by the lid 20.

  In the structure shown here, the cylindrical outer surface 22a of the peripheral portion 22 of the lid 20 incorporates a circumferential protrusion 23a, and the circumferential protrusion 23a is recessed upward together with the cylindrical outer surface 22a. A circumferential cradle 23 is defined having a cross section in the form of a circular arc. Nevertheless, the circumferential cradle 23 can be bent in different shapes, for example in the form of an outer circumferential groove provided in the generally cylindrical outer surface 22a of the peripheral portion 22 of the lid 20, and the section can be bent radially outward. It should be understood that it can be constructed in the form of an outer circumferential groove having in the form of a concave arc.

  FIGS. 1 a to 6 show a lid 20 made of plastic material, in which an annular part 24 is provided around a tubular body 10 under a double wrap 13 by a breakable bridge 26. A sealing part 25 with a skirt 25a seated so as to be closely attached is incorporated in the circumferential direction, so that under the double wrapping 13 or in the region of the upper edge 11a of the side wall 11 of the tubular body 10 It remains axially held under any other variation that is defined. The sealing portion 25 further includes an upper ring portion 25b. The upper ring portion 25b is disposed so as to cover the outermost portion of the annular upper wall 12 of the cylindrical body 10 of the can, and is broken in the axial direction. A possible bridge 26 is incorporated inside. The breakable bridge 26 is arranged to connect the inner edge 25g of the upper ring 25b and the peripheral outer edge of the annular portion 24 of the lid 20 at angularly spaced points.

  The breakable bridge 26 is ruptured when subjected to a specific traction force so as to separate the sealing portion 25 from the annular portion 24 during the initial opening of the lid 20.

  In the exemplary plastic lid construction, the sealing portion 25 has a blocking portion 25c in its circumferential extension, which extends along at least a portion of the height of the skirt 25a. The blocking portion 25c defines a specific circumferential spacing between each facing edge of the skirt 25a on both sides of the blocking portion 25c. The annular portion 24 is a grip tab 27 that protrudes axially upward, then radially outward, and axially downward through the blocking portion 25c of the sealing portion 25, for example substantially with the skirt 25a. A grip tab 27 is incorporated which is in the same height state. The grip tab 27 can be operated by hand only when a part of the sealing portion 25 is broken.

  In the structure shown here, the skirt 25a incorporates both ends of a sealing bridge 25d extending in the circumferential direction on both the blocking portion 25c of the sealing portion 25 and the grip tab 27. The sealing bridge 25d has a first end 25e that is incorporated into the skirt 25a by the connecting means 25f. When the first end 25e is pushed away from the skirt 25a, the connecting means 25f is broken, for example, by being pulled radially outward so as to open the hand access to the grip tab 27.

  Providing the grip tab 27 allows the base portion 21 to be easily removed from its seated state in the closing seat S, and similarly, in the region first adjacent to the grip tab 27 and then in the seat. In the remaining part of the section, the can can be unsealed little by little to prevent the stored food from being unexpectedly pulled out of the can.

  According to the present invention, the grip tab 27 can have either a solid form or at least a partially hollow form to define the handle according to the structure shown here.

  The grip tab 27 is solid and can be formed from respective portions of the skirt 25a so that it is substantially flush with the skirt 25a and maintains the circumferential recess 29 from the grip tab 27. I want you to understand.

  As shown here, the skirt 25a can incorporate an inner circumferential protrusion 25h that is axially spaced from the peripheral edge of the annular portion 24 and is cylindrically-shaped. Is sized to be seated and fixed axially under the double wrap 13 at the upper end of the.

  According to the closure component of the present invention, one or both of the parts defined by the annular upper wall 12 of the tubular body 10 and the annular part 24 of the lid 20 are compressed by the other of the parts when the lid is closed. An annular gasket 30 is disposed and dimensioned to define a respective annular sealing region between the lid 20 and the tubular body 10.

  In the structure shown in FIGS. 2, 3, and 4, the annular gasket 30 is formed on the annular upper wall 12 of the tubular body 10 so as to remain at a radially outer position with respect to the closing seat S. It is attached. FIG. 2 shows an annular gasket 30 attached directly to the upper surface of the annular upper wall 12. In structural form, the annular gasket 30 can be made of a suitable polymer resin, such as plastisol, that melts directly into the annular upper wall 12 of the tubular body 10 and is molded.

  The annular gasket 30 is formed of a different material having a specific compressibility that is compatible with the product to be packaged, thereby defining an area defined by the seating of the peripheral portion 22 of the lid 20 on the closure seat S Apart from that, it should be understood that it can be ensured that a second seating region is formed.

  Therefore, when the lid 20 is closed, the peripheral portion 22 ensures that the circumferential cradle 23 is seated against the closing seat S of the tubular body 10 to form the first sealed region. This also functions as an axial holding region for the lid 20 seated on the annular upper wall 12 of the tubular body 10. With this closed state of the lid 20, the annular gasket 30 is squeezed axially to ensure that a respective or second sealed area is formed. This is sufficient to ensure a tight seal inside the can for long-term storage, especially if the food is intended to be exported as required for a specific food. There is.

  In the structural form shown in FIG. 3, the annular portion 24 of the lid 20 incorporates two circumferential ribs 28 that are formed on the annular upper wall 12 of the tubular body 10 when the lid 20 is closed. Constructed and sized to squeeze the attached annular gasket 30 to ensure stronger deformation of the annular gasket 30 and a more secure seal. The annular portion 24 of the lid 20 can incorporate only one or more circumferential ribs 28, as shown in FIGS. 2, 4, 5, 7a and 8a, or it can be circular. It should be understood that it is possible to not incorporate the peripheral ribs 28 at all.

  In the structure shown in FIG. 4, the annular gasket 30 is formed in the circumferential recess 19 provided in the annular upper wall 12 of the cylindrical body 10, or is otherwise attached, 30 is generally dimensioned such that it projects axially slightly outward from the circumferential recess 19 and is compressed by the annular portion 24 of the lid 20. The circumferential recess 19 is expanded by the radially inner and outer walls of the annular gasket 30 when the annular gasket 30 is applied directly to the annular upper wall 12 of the tubular body 10 in a molten state. Preferably, it is dimensioned to better control

  In the structure shown in FIGS. 5-6, the annular gasket 30 is mounted under the annular portion 24 of the lid 20 and is upside down relative to the position shown in FIGS. Thus, the cylindrical upper wall 12 is pressed against the annular upper wall 12.

  In FIG. 5, the annular gasket 30 is mounted in a circumferential recess 29 provided in the annular portion 24 of the lid 20, and the annular gasket 30 is slightly outward in the axial direction from the circumferential recess 29. It protrudes and is pressed by the annular upper wall 12 of the tubular body 10 when the lid 20 is closed. The circumferential recess 29 must be dimensioned to include radial expansion of the annular gasket 30 when the annular gasket 30 is molded upside down on the annular portion 24 of the lid 20.

  In the structure shown in FIG. 6, the annular gasket 30 is attached to the annular portion 24 of the lid 20 and is compressed by the circumferential rib 18 defined by the deformation of the annular upper wall 12 of the tubular body 10. As discussed above for the circumferential ribs 28 of the lid 20, the annular upper wall 12 of the tubular body 10 can incorporate a plurality of circumferential ribs 18.

  In the structural variant shown in FIGS. 7 a, 7 b, 8 a and 8 b, the annular upper wall 12 of the tubular body 10 is a recess defined by the deformation of the side wall 11 of the tubular body 10. Defined by the radial circumferential ribs 16 projecting into the interior of the tubular body 10 below the upper edge 11 a of the side wall 11.

  In the form shown in FIG. 7 a, the annular gasket 30 is mounted on the annular upper wall 12 of the tubular body 10, or more precisely the radial circumference defining the annular upper wall 12. Mounted on the ribs 16, the lid 20 is made of plastic or sheet metal as described above for the plastic lid form shown in FIGS. 1 a-6, and has the same base portion 21, peripheral portion 22, and An annular portion 24 is included. In this construction, the annular portion 24 of the lid 20 presses against the annular gasket 30 when the lid 20 is closed, as described above for the plastic lid configuration shown in FIGS. Each sealed region is defined separately from the region defined by the seating of the peripheral cradle 23 on the closing seat S.

  As can be seen, as previously described for the plastic lid configuration shown in FIGS. 1 a-6, the radial circumferential ribs 16 are configured to define an upper opening “A” in the can. It has an edge 12a and a closing seat “S”, preferably in the form of a convex arc, which is seated on this closing seat “S” and is held here with a concave cross section A circumferential cradle 23 provided in the peripheral portion 22 of the lid 20 in the form of a circular arc. The radial circumferential rib 16 may have a cross section having any shape suitable for defining the closure seat S. In FIGS. 7 a and 7 b, the radial circumferential rib 16 has a horizontal “V” shaped cross section, and in FIGS. 8 a and 8 b, the cross section has a horizontal “U” shape. taking it. FIG. 7b shows a similar to the closure arrangement of FIG. 7a, but as described for the device shown in FIG. 3, the annular portion 24 of the sheet metal lid 20 is deformed and bent downwards. In addition, at least one circumferential rib 28 sized to compress the annular gasket 30 is incorporated.

  As can be seen in the structure shown in FIG. 7b, the inner edge 12a of the annular upper wall 12 defined by the radial circumferential ribs 16 is not only a closing seat S in the form of a convex arc, An upper circumferential protrusion 12b protruding upward from the annular upper wall 12 of the tubular body 10 is also defined, and the annular gasket 30 when the annular gasket 30 is directly formed on the annular upper wall 12 is defined. The material of the annular gasket 30 is allowed to flow through the closure seat S and into the cylindrical body 10, defining a barrier against excessive radial expansion of the material. Come to prevent. It should be understood that the upper circumferential protrusion 12b need not necessarily be formed close to the inner edge 12a of the circumferential rib 16 in the radial direction. As in the device shown in FIG. 4, the annular upper wall 12 can also be defined in another radially outermost region, in which case the upper circumferential protrusion 12 b is connected to the circumferential recess 19. Can be defined by a radially inner wall. However, apart from the circumferential recess 19, the upper circumferential protrusion 12 b is provided on the annular upper wall 12 so as to be spaced apart from the circumferential recess 19 in the radial direction. It is understood that when the annular gasket 30 is molded directly on the annular upper wall 12 of the tubular body 10, it can serve as an additional barrier to the inner radial expansion of the annular gasket material. I want to be.

  As shown in FIG. 8a, the lid 20, typically made of plastic material, seals its annular portion 24 with a structure similar to that described for the lid shown in FIGS. 1a-6. The portion 25 can have a periphery incorporated by a breakable bridge 26, but the skirt 25a provides a step 25x to be seated under the upper edge 11a of the side wall 11 of the tubular body 10. The upper edge 11a is in the form of an outer curl that functions as a structural element of the tubular body 10, and an ascending axial stop with respect to the skirt 25a of the sealing portion 25. Can take form.

  The closure structure shown in FIG. 8b is similar to that of FIG. 8a, but as described with respect to FIG. 6, the annular top wall 12 is dimensioned to compress the annular gasket 30 when the lid 20 is closed. At least one determined circumferential rib 18 is incorporated below.

  As shown in the device of FIG. 7b, the device of FIG. 8b has an inner edge 12a of the radial circumferential rib 16 separate from the closing seat S in the form of a convex arc, with the cylindrical body 10 An upper circumferential protrusion 12b projecting upward from the annular upper wall 12 of the annular body 30 is defined so as to close the material of the annular gasket 30 when the annular gasket 30 is applied to the annular upper wall 12 of the tubular body 10. Constructed to define a barrier against undesired radial expansion to the seat "S".

  The circumferential ribs 28 of the annular portion 24 of the lid 20 shown in FIGS. 7b and 9 are incorporated above the annular upper wall 12 of the tubular body 10 as shown in FIG. 6 of the accompanying drawings. It should be understood that one or more circumferential ribs can be exchanged that compress the annular gasket 30 mounted under the annular portion 24 of the lid 20.

  FIG. 9, which represents an embodiment of the present invention, shows a closure arrangement of the type shown in FIGS. 8a and 8b, where the upper edge 11a of the side wall 11 of the tubular body 10 is outward and downward. Then curved inward to define a cylindrical rib 17 which is incorporated externally into the upper edge 11a of the side wall 11 and extends downwardly beyond the radial circumferential rib 16 to make it Cover the forming recess. In FIG. 9, the annular portion 24 of the lid 20 incorporates at least one circumferential rib 28 dimensioned to compress the annular gasket 30 when the lid is closed.

  According to the structure shown here, the cylindrical rib 17 has a lower free end portion 17a, which is curved inward and then upwards under the radial circumferential rib 16. The cylindrical body 10 is disposed adjacent to the side wall 11. The cylindrical rib 17 is an elliptical shape in the axial direction of the can as a whole, and a central extension substantially parallel to the side wall 11 of the cylindrical main body 10 in a region where the circumferential rib 16 in the radial direction is incorporated. 17b.

  In the structure shown in FIGS. 7a, 7b, 8a, and 8b, the peripheral portion 22 of the lid 20 carries the circumferential cradle 23 outwardly as previously described in FIGS. It has a cross-section in the form of a concave arc so that it is fitted in and held here in the closing seat S.

This specification only describes and does not show the embodiment of the present invention shown in FIG. 9, but the form of the elements without departing from the structural concepts defined in the claims attached hereto. It should be understood that changes can be made to the physical configuration.

Is used in a closed-chain constructs, it shows a perspective view of a possible structure of a plastic lid which incorporates a sealing portion. FIG. 2 shows an exploded perspective view of the lid of FIG. 1b after initial opening. Shows a first embodiment relating to the closed chain constructs is shown in Figure 1a, the lid attached to the upper edge of the can, a radial partial cross-sectional view along the line II-II of Figure 1a Show. FIG. 3 is a view similar to the view of FIG. 2 but showing a second configuration of the closure arrangement. FIG. 4 is a view similar to the view of FIGS. 2 and 3 but showing a third configuration of the closure arrangement. FIG. 5 is a view similar to the view of FIGS. 2, 3 and 4 but showing a fourth configuration of the closure arrangement in which an annular gasket is carried by a lid. FIG. 6 is a view similar to FIG. 5 but showing a fifth form of the closure arrangement. Utilizes by that closed chain constructs in the form of FIG. 2 shows a radial cross-sectional view of the structure of another of the can / lid constructed of sheet metal. FIG. 7b is a view similar to FIG. 7a but showing a metal lid with an annular portion incorporating a circumferential rib. FIG. 7b is a cross-sectional view showing an enlarged detail view of the closure structure of the can / lid structure shown in FIG. 7b. FIG. 3 shows a radial cross-sectional view of a metal can / plastic lid structure incorporating a sealing portion and utilizing the closure arrangement shown in FIG. FIG. 8b is similar to FIG. 8a but shows the use of a plastic lid provided with a seal and an annular portion incorporating circumferential ribs. FIG. 8b shows a cross-sectional view with an enlarged detail of the can / lid closure arrangement shown in FIG. 8b. FIG. 8b is similar to FIG. 8b but presents the structure of the upper edge of the side wall of the can according to an embodiment of the invention.

DESCRIPTION OF SYMBOLS 10 Cylindrical main body 11 Side wall 11a Upper edge 12 Annular upper wall 12a Inner edge 12b Upper circumferential projection 13 Double winding 14 Cylindrical rib 16 Radial circumferential rib 17 Cylindrical rib 17a Lower free end part 17b Central extension 18 Circumferential rib 19 Circumferential recess 20 Lid 21 Base part 22 Peripheral part 22a Outer side 23 Circumferential cradle 23a Circumferential protrusion 24 Annular part 25 Sealing part 25a Skirt 25b Upper ring part 25c Blocking part 25d Sealing bridge 25e First end 25f Connecting means 25g Inner edge 25h Inner circumferential protrusion 25x Step 26 Breakable bridge 27 Grip tab 28 Circumferential rib 29 Circumferential recess 30 Annular gasket A Upper opening S Closing seat Part

Claims (13)

A can closure composition,
A tubular body (10) made of sheet metal and closed below is provided , the tubular body (10) carrying an annular upper wall (12), the annular upper wall (12) , Having an inner edge (12a) defining an upper opening (A) of the can, said inner edge (12a) being curved to define a closing seat (S) in the form of a convex arc. The can closure component further comprises:
A lid (20), the lid (20) is a single piece, a base portion (21), the surrounding portion (22), and an annular portion (24), said peripheral portion (22) cross section are provided concave arc forms der Ru circumferential cradle (23), at the cover (20) is seated on the can upper aperture (a), fitted to the closure seat (S) and closed Dimensioned to be held axially relative to the seat (S), the annular part (24) protruding radially outward from the peripheral part (22) and closing the lid (20) sometimes is seated on the annular upper wall (12),
When at least one of the portions of the annular upper wall (12) of the tubular body (10) and the annular portion (24) of the lid (20) is closed, the lid (20) and the tubular shape are formed. so as to define a respective annular sealing region between the body (10), an annular gasket (30) which is compressed and carried by the other sites,
The cylindrical main body (10) includes a side wall (11) provided with an upper edge (11a), and the annular upper wall (12) is formed in a radial direction formed by a recess of the side wall (11). The circumferential rib (16) is defined radially inside the cylindrical body (10) under the upper edge (11a) of the side wall (11). Protruding into the
The upper edge (11a) of the side wall (11) of the cylindrical body (10) defines a cylindrical rib (17) incorporated outside on the upper edge (11a) of the side wall (11). Curved outward, downward, then inward, the tubular rib (17) extends downwardly beyond the radial circumferential rib (16) to form a radial circumferential rib (16). A can closing structure, characterized in that it covers the recess .   An annular gasket (30) is incorporated into the other of the aforementioned portions of the annular upper wall (12) of the tubular body (10) and the annular portion (24) of the lid (20) when the lid (20) is closed. 2. Composition according to claim 1, characterized in that it is compressed by at least one circumferential rib (18, 28). When the annular upper wall (12) of the tubular body (10) molds the annular gasket (30) directly onto the annular upper wall (12), the material for the annular gasket (30) is closed. so as to define a barrier against the radial expansion towards the seat (S), characterized in that it carries an upper circumferential protruding portion that upwardly projecting (12b), according to claim 1 Composition. 4. Component according to claim 3 , characterized in that the upper circumferential protrusion (12b) is defined by a radially inner wall of the circumferential recess (19). An annular upper circumferential protruding portion of the cylindrical main body (10) (12b), characterized in that it is defined close to the inner edge of the upper wall of the annular (12) (12a), according to claim 3 The composition described in 1. The lid (20) is molded from a single piece of plastic material, the annular portion (24) incorporates a circumferential rib (28) below, and the circumferential rib (28) is connected to the cylindrical body (10). and wherein the squeezed Turkey against the top wall (annular gasket (30 attached to 12)) of the annular) structure of claim 1. The peripheral portion (22) of the lid (20) has a cylindrical outer surface (22a) entirely incorporating the circumferential projection (23a), and the circumferential projection (23a) and together with the outer surface (22a), cross section and wherein the Turkey to define a circumferential cradle (23) in the form of a concave arc, composition of claim 1. The radial circumferential rib (16) has an inner edge (12a) configured to define a closure seat (S) in the form of a convex arc. Item 2. The composition according to Item 1 . Upon direct molding of the annular gasket (30) onto the annular upper wall (12), to define a barrier to radial expansion of the annular gasket (30) material into the closure seat (S). To the inner edge of the circumferential rib (16) in the radial direction (12b) so as to define an upper circumferential projection (12b) protruding upward from the annular upper wall (12) of the tubular body (10). Composition according to claim 8 , characterized in that 12a) is constructed. Under the radial circumferential rib (16), inward and then it is curved upward, the lower free end portion disposed adjacent to the side wall (11) surrounding the tubular body (10) (17a ) and is characterized by having the tubular rib (17), construction of claim 1. The lid (20) is molded into a single piece of plastic material and the annular part (24) is seated around the tubular body (10) under the upper edge (11a) of the side wall (11); a skirt (25a) sealing portion (25) comprising a held axially, characterized in that it incorporates the surroundings by breakable bridges (26), construction of claim 1. The sealing portion (25) has a blocking portion (25c) extending at least a part of the height of the skirt (25a), and the annular portion (24) of the lid (20) is the blocking portion (25c). Grip tab (27) extending radially beyond the skirt (25a) circumferentially beyond the blocking portion (25c) of the sealing portion (25) and beyond the grip tab (27) By means of connecting means (25f) incorporating both ends of the extending sealing bridge (25d), one of the ends of the sealing bridge (25d) being ruptured when said end is pushed away from the skirt (25a), 12. Composition according to claim 11 , characterized in that it is incorporated in the skirt (25a).   An annular gasket (30) is formed of a polymer resin, such as plastisol, that is molded directly into one of the annular upper wall (12) and the annular portion (24) of the lid (20). The composition of claim 1, wherein:

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