MX2007003528A - Container seal for the storageof dangerous liquid material - Google Patents

Abstract

The invention relates to a seal between an open body end of a container (2) and an edge of a lid (1) which may be pressed into the open body end in a sealing manner. The sheet metal is bent outwards with a curved radius (11) by about 180°, whereby the lid edge separated from a lid surface (3) by a chanelled bead (4), extends with the radially external defining edge (5) thereof from the bead over an axial position of the lid surface (3) and is bent radially outwards around a radius to form a rolled edge (7), for housing an annular sealing material (9) which is stretched downwards. A sheet edge (8) for the rolled edge (7) terminates at a radial separation (d8) before the defining edge (5), said separation being of such a size that on sealing, the body end, with the curved radius (11) thereof in contact with the defining edge (5) of the lid (1), may be inserted, between the same and the sealing material (9), into the rolled edge.

Description

SEAL FOR CONTAINER FOR STORAGE OF DANGEROUS LIQUID MATERIALS BACKGROUND OF THE INVENTION The invention relates to a closure or seal between the open end of the body of a container and the edge or edge of a lid that can be placed by pressing it on the open end of said body. The lid is removable. Both components (lid and container) are made of a (relatively) light metal sheet. It is a primary objective to provide a particularly secure closure, particularly for hazardous liquid materials, capable of withstanding mechanical stresses such as blows or bricks.

A closure for a metal container is shown in WO-A 1992/04248 (Baltics). For this closure an intermediate ring is used, which receives a sealing ring that contributes to the mechanical securing of the cover in the closed position. For security an adhesive is applied between the sealing surfaces that interact, which binds the compounds.

USES, OBJECTIVES AND ADVANTAGES OF THE PRESENT INVENTION The object of the present invention is to create a closure that satisfies the high requirements corresponding to a closure of this type, which is easier and cheaper to manufacture. This is achieved with what is described in claim 1, claim 11, claim 10 or according to claim 12 or 13.

The pressure cap described here can largely match the shapes of caps known up to now, so that the invention can be applied to a large part of the production processes and means that are already known. The technical modifications can be reduced to a minimum, which is considered another objective of the invention and should not be considered as a disadvantage.

Based on this invention a great tightness is achieved by the direct interaction between the open end of the container and the edge of the lid that seals it, so that for this purpose no additional intermediate ring is required for its closure. Within the area of strong deformation, the end of the body (directly or indirectly above a remaining layer of the Compound) has contact with the lid sheet (limiting flank) within its at least partially rolled edge (rolled edge) and in this way it can be fitted in this way, achieving a seal by means of the direct contact that advantageously extends on the surface and under reciprocal radial tension (claims 3, 15).

At the same time this area is covered externally by a sealing material (Compound) placed on the rolled edge of the lid in radial direction, which can be specially developed as an expansive compound.

In a closing process, the doubling of the open end of the body comes into contact with the sealing material and the outer face of the limiting flank of the lid.

Description of the Figures The following describes and explains several examples of various embodiments of the present invention: Figure 1 shows the important parts of the lid and the open end of the body of a closed or resealable or openable container or container illustrated in an axial section and showing the closure or open seal.

Figure 2 shows the same components as those illustrated in figure 1, but in the closed position.

Figure 3 shows another embodiment of this seal.

Description of the invention The lid 1, as a component of the seal, has an edge (section 1 of the rim) which is joined to the flat central part of the lid 3 through a relatively deep groove 4 (with a "U" shape seen in a cross section) ), which can also serve as a cushion groove, for example against mechanical forces such as blows. The lid has an outer limiting flank 5 protruding in the axial direction from the flat part of the lid 3, and which when folded becomes a rolled edge 7 bent outward, whose edge of sheet 8 ends at a radial distance (visible) before of the upper section 5a of the limiting flank 5. The doubling of the rolled edge has a deformation radius large enough to accommodate a sealing or sealing material 9 of sufficient volume to extend through the lower opening slot d8 formed by the bending of the rolled edge 7 along the limiting flank 5.

The lateral surface 2a of the container body 10 is bent outwards at 180 ° by means of a double of a small radius 11 forming the opening of the container body. The metal sheet 18 extends axially downwards from the radial doubles to the radial distance Ar (determined by the measurement of the radius of deformation) parallel to the lateral surface of the body 10, ie in a longitudinal measurement L18, which it clearly exceeds the diameter d7 of the rolled edge 7 of the lid 1.

The sheet is then bent out radially and axially for the formation of a supporting edge 12. At the outer limit of the supporting edge, the sheet is bent axially downwards and ends in a large diameter roll 13 compared to the Rolled edge 7 of the lid - or the diameter measurement dll of the closed or small fold 11, said measurement was chosen in such a way that the rolling 13 abuts or even makes contact with its inner radial area with the wall of the body 10.

In a modification, the body sheet can be molded-at least in one section-as an opening aid 16, drawn outwardly between the supporting edge 12 and the rolling edge 13, as shown in Figure 1 with dotted line rising in shape of a loop 16 or protruding lug.

To mechanically secure the closure of the container after the lid is inserted making contact with the upper end of the container edge, the wall of the body 10 and the limiting flank 5 of the lid 1, which respectively have a protrusion 15 and 14 that fit one inside the other and that serves as a contact or hook element.

Figure 1 shows the lid on the open end of the body or container just before beginning the process of closing under pressure in the manner indicated by the direction of arrow 17.

The open end of the body 10 with the fold 11 extends as far as possible inside the rolled edge 7, more or less up to the curvature 6 between the outer limiting flank 5 and the rolled edge 7 of the lid. The lateral surface of the body of the container 10 comes into contact (direct or indirect) with the outer limiting flank 5 of the lid. This contact extends superficially along the walls 5 and 10 and is preferably achieved under a pre-radial tension which is schematically outlined in Figure 2, in which the overlapping of the wall of the container with that of the lid is shown in FIG. an axial cut. A remaining layer of Compound 9 that has been displaced can still be found outside. This is also a contact with the limiting flank 5 by the upper end of the body.

By means of this contact, made under a previous tension, a mechanically reliable seal is achieved between the two participating components of the seal.

Figure 2 further shows that the radial distance of the sheet edge 18 of the limiting flank 5 was chosen so large that on the one hand the edge of the container with the deformation arch 11 can be pushed securely on the rolled edge 7, and on the other side, there is sufficient space for the sealing material 9 which maintains a reliable coherent cross section inside the rolled edge 7 and outside, in the area of the supporting edge. Meanwhile, the sealing material is kept under pressure inside the rolled edge 7 and between it and the supporting edge 12, which considerably increases the sealing effect in such a way that the application of an adhesive in the area of sealing surfaces.

The deep and wide groove 4, the large rolled edge 7, the radial distance between the wall sections 10 and 18, the inclined bearing edge 12 and the high volume rolling 13, making at least contact with the wall of the body 10 , together form a very effective suspension and damping system that is capable of safely absorbing almost all possible pressure or impact forces that could have an effect from the outside on the area of the closure, preventing any closure or closure of the container is diminished under the action of these or any other force.

From the description and representation of the closure, it becomes evident that the end of the body 10, with all the elements belonging to the closure -11, 18, 12, 13 and in any case 16-, can be molded from a single sheet cut-out, and therefore no additional intermediate ring is required.

The lid can be manufactured in general with known processes and means. Therefore, the complete closure can be manufactured in a simple and economical manner, in addition it guarantees an excellent stability and tightness in such a way that it can also be applied to the package of dangerous media.

Another example of construction of the invention is shown in Figure 3. For purposes of explanation reference can be made to the state of not closed (at the beginning of the aforementioned closing process) according to Figure 1. The closed state according to Figure 2 can be also transferred to Figure 3, in this case not represented in a special way.

The modification of the embodiments described above consists in that the groove or protuberance of the body of the base plate 15, which has been molded more strongly in radial direction outwards, to have a ring-supporting effect in the form of ring 13. The ring-shaped roll is formed according to FIG. 1 in an adjoining manner, especially adjacent to the body of the container 10 (the upper section of the container body 2). By displacing the groove or protrusion 15 to a higher axial position, it results in a radial support section to the rolling 13, which allows an additional stabilization of the position of the supporting edge 12. Likewise also of the aid to the opening 16, which in this other embodiment of the invention is represented by the dotted line.

The fold or groove of the body or container 15 'can also be molded more open axially, as well as more axially closed, for example as shown in Figure 1.

The section 14 'of the lid, which intervenes with the fold or groove 15', will be molded accordingly so that in the closed state it can fit with the fold or groove 15 'by means of the shape and / or the contact force. A support that is at least partially superficial also results here, being able to take advantage of the axial pressure upwards of the fold or groove 14 'of the cover to support the fold or groove 15' in the container, which enables both grooves to rest on radial direction inwards and axially downwards when rolling in the form of a ring 13.

It is a composite of support and rolling grooves, which are formed by all the participating components in the closing area.

Claims (15)

Claims:

1. A seal or closure between the open end of the body of a container or container and the edge of a lid, which closes under pressure by sealing the open end of the body - both of sheet -, in which the sheet of the open end of the body is bent outwards and downwards in a deformation radius of 180 °, which rises axially outwards through an axial position and which fits perfectly with its lid. The one-piece sheet lid has a flat central part surrounded circumferentially by a groove, which in turn has a radial outer boundary flank for the groove itself. The sheet of this limiting flank is bent radially outwards and downwards to form a rolled edge, with a radius (clearly) greater in comparison with the deformation radius at the end of the body, which also has a lower opening slot for the housing of an annular sealing material that fills said opening. The rolled edge ends in a sheet edge at a distance in front of the limiting flank, whose distance has been dimensioned in such a way that during the closing process the end of the body or container, with its deformation radius), comes into contact with the limiting flank of the cap so that it can be interposed between it and the sealing material into the lower groove of the rolled edge.

2. A seal according to claim 1, wherein the diameter of the open end of the body within the area of the narrow bend with the radius of and the diameter of the edge of the cap are adjusted to each other, in the area of the curvature of the limiting flank and the rolled edge, so that in the closed state, the end of the body with its radius of deformation under a radial inward pre-tension, is in contact with the curvature, between the limiting flank and the rolled edge.

3. A seal according to claim 1 or 2, the sealing material being an expansive compound.

4. A seal according to the previous claims, the sheet of the body of the container extending axially downwards, leaving the small radius of deformation at a radial distance and more or less parallel to the wall of the body, especially beyond the lower edge of the rolled edge or more. length than the diameter of the rolled edge, and then the sheet of the container lowered and folded forming a supporting edge along the entire circumference of the body serving to support the sealing material in the closed position.

5. A seal according to claim 4, wherein the bearing surface is folded radially outward and ascending obliquely.

6. A seal or closure according to claim 1, 4 or 5, wherein the sheet of the body of the container is bent axially outwards and downwards, then folded or rolled inwards, where the radius of the fold of the rolled edge has a measurement such that it is adjacent and almost comes into contact with the outer edge of the body, being particularly adjacent to the protrusion surrounding the circumference of the body wall.

7. A seal according to claim 4, 5 or 6, wherein the body sheet between the supporting edge and its tie-doubles (rolled edge) form a protruding appendage, particularly as an aid to the opening of the container.

8. A seal according to the claims described above, which is characterized in that the wall of the body or container and all the closing elements thereof, including the lid, are molded in the same cut of sheet in one piece.

9. A seal according to the claims described above, in which the lid and the end of the body of the container are kept in the closed position, by means of the contact-shaped intervention of the circumferential protuberances surrounding the body of the container and the limiting flank external of the cover, having superficial contact both areas by an axial expansion under a radial pre-tension.

10. A seal according to claim 1, in which the lid and the body are removably attached as a closed container.

11. A seal according to claim 1, still without closing the container edge, where the free edge of the body of the container is suitable for closing with the sheet lid sealing it.

12. A sealing edge on the open end of the body of a container and an edge of a lid that closes and seals under pressure within the open end of the container or container (both of sheet). In which the sheet of the upper open edge of the body is bent outwards and downwards with a radius of deformation essentially of 180 °, and furthermore, is bent radially outwards and downwards with a radius (clearly) greater than the radius of deformation of the end of the body. This edge has a radius which, during the closing process, allows it to fit into the rolled edge of the lid, in which an annular sealing material extending axially downwards (in the lower opening slot) is housed. The end of the lid ends in a sheet edge at a distance from the limiting flank of the lid which is dimensioned in such a way that during the closing process the upper end of the edge of the body can be introduced into the interior of the lower slot edge rolling of the lid.

13. The body of a container, with lid and whose wall ends at a relatively sharp free end or edge and a relatively flat edging or supporting edge; First for the introduction of the surface of the outer wall of the lid inside the hole where an expansive compound for the snap closure is placed; Second for the sealing support of a part of the expansive compound running axially downwards, as a sealing material, projecting axially to the sharp end and the edge or flat supporting edge of the body.

14. The body of the container according to claim 13, wherein the flat support edging of the container body, continues and becomes a rolled one when folded envelopes itself. This doubles, edging or rolled edge is folded on itself to make contact with the external surface of the body of the container and to rest particularly on the protrusion surrounding the circumference of the body of the container or container.

15. A seal according to the claims already described, wherein during the closing process the end of the body of the container, with its radius of deformation, together with the sealing material comes into contact with the outer surface of the flank-limiting of the lid that seal