MX2012008013A

MX2012008013A - Container.

Info

Publication number: MX2012008013A
Application number: MX2012008013A
Authority: MX
Inventors: Lars Pudselykke
Original assignee: Superfos As
Priority date: 2010-01-11
Filing date: 2011-01-07
Publication date: 2012-11-30
Also published as: PT2523866E; WO2011083139A1; RU2531898C2; DK2523866T3; CA2786808A1; AU2011204619A1; EP2523866B1; AU2011204619B2; TN2012000354A1; PL2523866T3; EP2523866A1; ZA201205618B; CA2786808C; US20130098914A1; USD826045S1; NZ601237A; RU2012133071A; ES2472946T3; MA33990B1

Abstract

The container (1) comprises a number of side walls (2) meeting at corners (3), a bottom, and a top opening (4) with a detachable lid (5). At a corner (3) of the container, a curved corner section (11) of an inward directed ridge (8) of the lid (5) is provided with a bendable skirt section (12) being adapted to be bent to an outward directed position (12') in such a way that a central part of the curved corner section (11) of the inward directed ridge (8) of the lid (5) is levered away from an outward directed ridge (6) of the top opening (4) and that engagement between the corresponding ridges (6, 8) thereby is weakened in an area at said central part.

Description

CONTAINER FIELD OF THE INVENTION The present invention relates to a container comprising a number of side walls that are joined at the corners, a bottom, an upper opening and a removable cover that covers the upper opening, the upper opening is fitted with an outwardly directed flange that peripherally extending, the lid is conditioned with a peripherally extending downwardly flexing engagement portion having an inwardly directed flange adapted to be gripped below the rim directed outwardly from the upper opening, the lid further being fitted with an edge that extends below the engaging portion from the flange directed inwardly thereof, the flange directed outwardly of the upper opening and the corresponding inwardly directed flange of the cover having corner sections curved at the corners in which the walls sides of the container meet, the corner sections curved connect the side sections of the respective flanges, wherein at least one of the curved corner sections of the flange directed inward of the cover is conditioned with a flexable edge section that is adapted to be bent toward an outwardly directed position of so that a central part of the at least one curved corner section of the flange directed inwardly of the lid is leveraged away from the flange directed outwardly of the upper opening and engages between the corresponding flanges thereby weakening in a area in the central part.

In EP 1 681 242 Bl (Superfos) describes a container of this type having four walls that meet at rounded corners. For the purpose of opening the container, a cavity is formed at the edge of the container wall near a corner, so that a pair of fingers can be inserted into the cavity and thereby press up on the edge of the container. top. However, due to the relatively small radius of the rounded corner, considerable force may be necessary to disengage the flange directed inwardly from the flange cap directed outwardly from the upper opening. Pressing on the lower edge of the thin wall of the edge can be inconvenient for the user.

DE 201 12 433 Ul and EP 0 110 859 A1 disclose a container comprising a number of side walls which are at the corners, a bottom, an upper opening and a removable lid covering the upper opening, the upper opening being fitted with a peripherally extending outwardly directed rim, the lid is conditioned with a peripherally extending downwardly flexing engagement portion having an inwardly directed flange adapted to be gripped under the rim directed outwardly of the upper opening, the lid further it is provided with an edge that extends below the engaging portion of the flange directed inwardly thereof, the flange directed outwardly of the upper aperture and the corresponding inwardly directed flange of the cap having corner sections curved at the corners in which the side walls of the container meet, the curved corner sections connecting the lateral sections of the respective flanges, wherein at least one of the curved corner sections of the flange directed inwardly of the cover is conditioned with a flexable edge section that is adapted to be bent towards a position directed towards outside so that a central part of the at least one curved corner section of the flange directed inwardly of the lid is leveraged away from the flange directed outwardly of the upper opening and engages between the corresponding flanges thereby weakening in an area in the central part.

In order to overcome the force necessary to open the container, it is known to form the ledge directed inwardly of the lid and / or the rim directed outwardly of the upper opening with a smaller cross section or a smaller protrusion in the direction radial in the area of the corner to be opened that along the rest of the peripheral extension of the top and the top opening. However, as an appropriate sealing effect of the lid must be maintained, the cross section or the protrusion in the radial direction of the rims can not be so small, and consequently the lid can still be somewhat difficult to open. There are also known containers that have a lid with a relatively thicker edge in the corner to be opened for the purpose of not hurting the fingers.

The object of the present invention is to facilitate the opening of the container without compromising the sealing effect between the lid and the upper opening.

In view of this object, in that the bending edge section is separated from the remaining part of the edge by means of at least two grooves formed in the outer surface of the edge and extending downwards from an area in the bending line towards the lower edge of the edge, the grooves reduce the wall thickness of the edge so that the edge may fracture along the grooves for the purpose of 'flexing the flexable edge section towards an outward facing position.

Therefore, for the purpose of opening the container, a pair of fingers can press on the lower side of the flexable edge section, thereby flexing it outwards and consequently weakening the coupling between the corresponding ridges, so that it is reduced the necessary opening force and with it the opening is facilitated. Before opening, the engagement between the corresponding flanges is not weakened, and therefore the sealing effect is not compromised.

The cross section and / or the radial protuberance of the corresponding flanges can additionally be reduced in the corner to be opened for the purpose of further facilitating the opening of the container. It is also possible to form the corresponding flanges of another material different from the rest of the lid or the container, for example, in one or both of the flanges or even a larger part of the corner of the lid and / or the upper opening of the container it can be formed of a softer and / or more elastic material incorporated by a co-injection.

Alternatively, the ridges can be formed with a cross section and / or a radial protrusion without reduction along the entire periphery of the container for the purpose of improving the sealing effect before opening the container. Due to the leverage effect according to the invention, the opening of the lid can even be possible and / or facilitated without changing the shape of the flange in the corner or corners to be opened.

In one embodiment, the flexing edge section is ready to flex on a line of flexure along which the material of the lid is weakened or on which the material of the lid is pre-flexed. With this, the bending line can be predetermined in the container's design lid, and this can ensure that the bending edge section is flexed along a line providing an optimized leverage effect for the purpose of effectively raising the flange directed inward of the cap away from the ledge facing outward from the top opening. Additionally, bending of the flexable edge section can be facilitated.

In one embodiment, a flexure line is formed in a flexure section connecting the peripherally flexed downwardly engaging portion and the edge and the flexure section has an outer side that extends obliquely downwardly and outwardly, the outer side thereby forms an angle with both, the peripherally flexed downwardly engaging engagement portion and the edge. Therefore, the flexing of the flexable edge section can start along the angled connection between the engaging portion and the bending section and further continue to flex on the entire bending section. In that way, the position of the flexion can be controlled.In one embodiment, the bending lines extend below the mutually contacting faces' of the rim directed outwardly of the upper opening and the corresponding inwardly directed rim of the lid, respectively. Therefore, it can be guaranteed that the rim directed inwardly of the lid will not fracture during bending, and consequently the sealing effect after closing the lid again can be good.

In one embodiment, a protrusion is formed proximate to a line of flexure and on the outer side of the engaging portion or on the outer side of the flexable edge section, and in that the protrusion is adapted to be punctured between the section of flexing edge and engaging portion when flexing the bending edge section towards its outward facing position. Therefore, the protrusion can improve the leverage effect for the purpose of leveraging even more effectively a central portion of at least one curved corner section of the flange directed inwardly of the cap away from the flange directed out of the opening higher.

In one embodiment, at least a portion of the flexable edge section is separated from the remaining edge portion by means of two spaced elastic elements, such as the edge portions having a thinner wall thickness than the remaining part of the edge. edge or edge parts that have a bellows-type configuration. Therefore, the sealing sector of the lid after reclosing the container can be improved in that the flexable edge section can flex elastically back at least approximately to its initial position, thereby ensuring a good hooking between the rim directed inwardly of the lid and the rim directed outwardly from the upper opening after closing.

In one embodiment, the spaced elastic or expandable elements divide at least part of the ledge directed into the lid on either side of the flexable edge section. With this, the disengagement can be facilitated between the rim directed inwardly of the lid and the rim directed outwardly of the upper opening during the opening of the container. This may be possible without compromising the sealing effect of the cap, because the spaced or expandable elastic elements may seal the divided area of the flange directed inwardly of the cap against fluid leakage.

In one embodiment, the bending edge section is separated from the remaining part of the edge by two cuts or pre-cuts extending downwardly from an area below the ledge facing inwardly of the lid. This can be an easy manufacturing modality. In the case of pre-cuts, a container with unauthorized anti-opening evidence can be provided.

In one embodiment, the flexable edge section is separated from the remaining edge portion by means of at least two grooves formed in the outer surface of the edge and extending downwardly from an area in the flexure line to the lower edge. of the edge, the grooves that reduce the wall thickness of the edge so that the edge can fracture along the grooves for the purpose of flexing the flexable edge section towards its outward facing position. This can be an easy manufacturing mode. In the case of pre-cuts, a container with evidence against unauthorized opening can be provided.

In one embodiment, the flexing edge section is reinforced against bending along the line extending in its longitudinal direction, possibly by ribs extending at right angles to its longitudinal direction. Therefore, the leverage effect of the flexing flange section can be improved for the purpose of making the lever even more effectively the flange directed inwardly of the cap away from the edge directed outwardly of the upper aperture.

In one embodiment, the flexionable border section is reinforced against a flexure along a line extending in its longitudinal direction by mutually spaced ribs extending at right angles to its longitudinal direction, the ribs have ends upper ones adapted to abut the outer side of the engaging portion when the flexable edge section is flexed towards its outward facing position. Therefore, the abutment of the protuberances in the form of the upper ends of the ribs can improve the leverage effect for the purpose of leveraging even more effectively a central part of the at least one curved corner section of the directed flange inward from the cap away from the ledge facing outward from the top opening.

BRIEF DESCRIPTION OF THE FIGURES The invention will now be explained in more detail below by means of examples and modalities with reference to very schematic Figures, in which: Figure 1 is a cross section through a corner of the container according to the invention along the line indicated in Figure 3; Figure 2 is a top view of the container; Figure 3 is a detail of the container as indicated in Figure 2; Figure 4 is a cross-sectional view corresponding to that of Figure 1 of another embodiment of the container according to the invention; Figure 5 is a perspective view of the outer side of the corner of the lid of the container illustrated in Figure 4; Figure 6 is a cross-sectional view corresponding to that of Figure 1 of yet another embodiment of the container according to the invention; Figures 7 and 8 are different perspective views of the embodiment of the container shown in Figure 6, whereby a reflective edge section of the lid is in original assumption and assumed to be flexed outwards, respectively; Figures 9 and 10 are perspective views of the cover lid of the container shown in Figure 6, by which a flexable edge section of the lid is in its original position and in its flexed outward position, respectively; Y Figures 11 and 12 are views in different perspectives of a detail showing a flexing edge section of the lid shown in Figures 9 and 10, whereby the flexable edge section is in its original position and in its flexed position towards outside, respectively.

DETAILED DESCRIPTION OF THE INVENTION Figure 2 shows a top view of a container 1 according to the invention. The container 1 has four-sided walls 2 that meet at the corners 3, a bottom that is not shown, an upper opening 4 and a removable lid 5 that covers the upper opening, see also Figure 1. The container 1 and the lid 5 comprised by the container are preferably produced with plastic material by injection molding. The upper opening 4 is conditioned with a peripherally extending outwardly extending flange 6, and the cover 5 is conditioned with a peripherally extending downwardly flexing engagement portion 7 having an inwardly directed flange 8 adapted to be gripped under the head. outwardly directed flange 6 of the upper opening 4. In the embodiment shown, a membrane 20 of the cover is lowered in relation to the engagement portion bent downwards 7 by means of a wall 19. The cover 5 is further provided with a edge 9 extending below the engaging portion 7 of the flange directed inwards 8 thereof. The outwardly directed flange 6 of the upper opening 4 and the corresponding inwardly directed flange of the lid 5 have curved corner sections 10, 11 at the corners 3 in which the sides of the container 1 meet, the corner sections curved 10, 11 connecting the side sections of the respective flanges 6, 8. The curved corner section 10 of the outwardly directed flange 6 and the curved corner section 11 of the inwardly directed flange 8 are visible in cross section in Figure 1 .

In the right, lower corner 3 of the container 1 as shown in Figure 2, the curved corner section 11 of the inwardly directed flange 8 of the lid 5 is conditioned with a flexable edge section 12 which is adapted to be bent towards an outward directed position as can be seen in the Figure and, for example, approximately directed as indicated by the line 12 'in Figure 1. As can also be seen in Figure 1, the container 1 is further conditioned with a edge section 24 extending downward on the outer side of the upper edge of the side walls 2. A grip opening not shown in Figure 1 may be conditioned in the edge section 24 below the flex edge section 12, so that a finger can be inserted into the gripping opening for the purpose of gripping under the edge of the flexing edge section 12 to flex it to its outward facing position. Alternatively, a gripping opening can be conditioned in the same flexable edge section 12 or any other suitable gripping means, such as a protuberance, can be conditioned on the flexable edge section 12 for the purpose of facilitating gripping.

One or more of the curved corner sections 11 of the inwardly directed flange 8 of the lid 5 can be conditioned with such a flexable edge section 12.

Especially, two diagonally opposite corner sections 11 can be conditioned with a flexable edge section 12, such as the right, lower corner 3 and in the upper, left corner 3 of the container 1 according to that shown in Figure 2. This it may be convenient, for example, in a mode as shown in Figures 7 and 8, wherein the container is substantially rectangular and is conditioned with diagonally opposed gripping openings 23 in an edge section 24 extending on the outer side of the upper edge of the side walls 2. Due to this configuration, the cover 5 can be mounted on the opening 4 of the container in any of two possible positions, thereby facilitating the assembly. In any of these positions, a flexable edge section 12 will be placed over a corresponding grip opening 23 in the edge section 24.

Even though the line 12 'in Figure 1 is shown as an approximately horizontal line, the flexable edge section 12 can also be adapted to flex towards an outward directed position which is angled relative to the horizontal, for example so that the outer free end of the flexable edge section 12 is directed obliquely upwards. Alternatively, the outer free end of the flexable edge section 12 can, in the flexed outward position of the flexable edge section 12, be directed obliquely downwardly. The arrow 13 indicates the direction of flexure at which the flexable edge section 12 must be flexed so that a central portion of a curved corner section 11 of the inwardly directed flange 8 of the cover 5 is levered away from the outwardly directed flange 6 of the upper opening 4 and which engages between the corresponding flanges 6, 8 thereby weakens in the area in the central part. The curved corner section 11 of the inwardly directed flange 8 of the lid 5 is shown in cross section in Figure 1 and is not visible in Figure 3; however, it should be noted that the curved corner section 11 of the inwardly directed flange 8 extends between the markings 14 and 15 in Figure 3 and follows the rounded lines that are seen on the upper side of the cap and extending between these markings 14, 15. The aforementioned central portion of the curved corner section 11 of the inwardly directed flange 8 of the cover 5 can, for example, extend about 1/3 or about 1/2 the length of the section of curved corner 11.

In this context, the inward expression, when related to the shoulders 6, 8 or any other along the periphery of the corner 1 means directed against a central vertical axis through the container when the container is placed with its bottom on a horizontal surface.

Outwardly it is related to the opposite direction, which is moving away from the vertical axis. In fact, all the addresses mentioned in this application relate to the container 1 when it is placed with its bottom on a horizontal surface.

Conveniently, the bending edge section is ready to flex on a line of flexure along which the material of the lid is weakened or on which the material of the lid is pre-flexed or along which the material of the lid is flexed. the lid in any other suitable manner is prepared or adapted to facilitate bending.

However, in the embodiment shown in Figure 1, a bending line 16 is formed in the bending section 17 which connects the peripherally extending flexed engaging portion 7 and the edge 9. The bending section 17 has an outer side that extends obliquely downwardly and outwardly, the exterior thereby forms an angle with both the peripherally extending downwardly flexing engagement portion 7 and the edge 9. In Figure 1, the flexure line 16 is indicated in the area of the angle formed between the outer side of the bending section 17 and the downwardly biased engaging portion 7; however, depending on the exact configuration of the shape of the lid 5, the bending line 16 can also be located further down the bending section 17. In fact, for the purpose of optimizing the leverage effect of the section of flexing edge 12, the bending line 16 can follow a path of different heights along the length of the curved corner section 11 of the inwardly directed flange 8. For example, the bending line 16 can be positioned slightly more high in the central part of the curved corner section 11 than in the end portions of the curved corner section 11. For example, in another embodiment, the bending line 16 can be positioned slightly lower in the central part of the section of curved corner 11 that in the end portions of the curved corner section 11.

It may be preferred that the bending line 16 extends below the mutually contacting faces of the outwardly directed flange 6 of the upper opening 4 and the corresponding inwardly directed flange 8 of the cover 5, respectively. With this, it can be ensured that the inwardly directed flange 8 does not fracture during the bending operation.

In the embodiment shown in Figure 1, it can be seen that the flexure line 16 is formed in a flexure section 17 well positioned below the inwardly directed flange 8 of the cover 5. In the embodiment shown in Figure 4, it can be seen that the flexure line 16 is formed in a flexure section 17 located in the upper part of the inwardly directed flange 8 of the cover 5.

In the embodiment shown in Figure 3, it is seen that the flexable edge section 12 is separated from the remaining part of the edge 9 by two cuts 18 or pre-cuts extending down from an area below the ledge directed towards in 8 of the lid 5. In additional embodiments, one or more additional cuts separating the bend-edged section 12 in two or more parts may be provided.

The cuts 18 may in fact be further upwardly biased and divide at least part of the inwardly directed flange 8 of the cover 5 on either side of the flexable edge section 12. However, in that case it may be preferred to cover the cut by at least through the flange directed inwards 8 by means of elastic or expandable elements for the purpose of guaranteeing the sealing effect of the lid before and preferably also after opening and reclosing. It should be noted that in such an embodiment, the bending line 16 may partly or completely extend above the angle between the engaging portion 7 and the bending section 17; in fact, it can partly or completely extend on a level or even above the inwardly directed flange 8.

In one embodiment, at least part of the bending edge section 12 is separated from the remaining part of the edge 9 by means of two spaced elastic elements not shown, such as portions of the edge 9 having a thinner wall thickness than the edge. remaining part of the edge or edge portions that have a bellows-like configuration. Therefore, the flexing edge section 12 can automatically return to its initial position after opening the lid.

In one embodiment the spaced elastic or expandable elements divide at least part of the inwardly directed edge 8 of the lid on either side of the flexable edge section 12.

In one embodiment, the flexing edge section 12 is reinforced against a flexure along a line extending in its longitudinal direction, for example, by means of reinforcing ribs or other appropriate protuberances or the like. Therefore, the aforementioned leverage effect of the bending edge section 12 can be improved. In the embodiments shown in Figures 4 to 12, this is done by means of the ribs (21) extending at right angles to the longitudinal direction of the bend-edged section 12. Therefore, it can be ensured that the flexing edge section 12 will not flex itself, on the contrary, it is rather flexed relative to the engaging portion 7 on a bending line 16.

In the embodiment shown in Figures 4 and 5, the flexable edge section 12 is separated from the remaining part of the edge 9 by means of two grooves 22 formed in the outer surface of the edge 9 and extending downwards from an area of the bending line 16 towards the lower edge of the edge 9. The grooves 22 reduce the wall thickness of the edge 9 from a normal thickness T to a reduced thickness t, so that the edge can fracture along the grooves 22 with the purpose of flexing the flexable edge section 12 to its outwardly directed position 12 '. In the embodiment shown, the slots 22 are viewed so as to have a triangular cross-sectional shape. Further, in the embodiment shown, the flexing edge section 12 is separated into two separate flexable edge sections 12a, 12b by means of a groove 22 'similar to the grooves 22 that separate the flex edge section 12 from the remaining part. of the edge 9. The supply of this additional slot 22 'can further facilitate upward flexing of the flexable edge section 12 in that the separation of the flexable edge section 12 into two separate flexable edge sections 12a, 12b can reduce the tensions in the flexable edge section 12 during bending, especially in the longitudinal direction of, and near the bottom edge of, the flexable edge section 12. In other embodiments, the flexable edge section 12 can also be separated into more sections flexing edges separated by means of additional supplementary grooves 22 '.

It should be noted that in the embodiment shown in Figures 4 and 5, the grooves 22, 22 'extend to an outer side that extends downward, obliquely of the bending section 17 connecting the downwardly biased engaging portion that it extends peripherally 7 and edge 9. As the bending section 17 in this embodiment is located at the top of the inwardly directed flange 8 of the lid 5, the groove 22, 22 'provide the reduced wall thickness t which also extends to the top of the inwardly directed flange 8; however, because the thickness of the inwardly directed flange 8, the inwardly directed flange 8 may not fracture when the edge is fractured along the slots 22 for the purpose of flexing the flexable edge section 12 into position directed outward 12 '. Thus, when the flexable edge section 12 is bent towards its outwardly directed position 12 ', the apart of the inwardly directed flange 8 located above the slots 22 can be twisted about its longitudinal axis for the purpose of allowing a central part of the curved corner section 11 of the inwardly directed flange 8 of the lid 5 is leveraged away from the outwardly directed flange 6 of the upper opening 4, whereby the engagement between the corresponding flanges 6, 8 weakens in an area in the central part. Additionally, in the embodiment shown in Figures 4 and 5, it should be noted that, as explained above, the flexable edge section 12 is reinforced against a flexion along a line extending in its longitudinal direction by means of of mutually spaced ribs 21 extending at right angles to their longitudinal direction, whereby the leverage effect can be improved. The ribs 21 have upper ends 25 adapted to abut the outer side of the engaging portion 7 when the flexable edge section 12 is flexed towards its outwardly directed position 12 '. It should be noted that, in this embodiment, the upper ends 25 of the ribs 21, in the non-flexed position of the flexable edge section 12, are positioned on the flexure section 17 and extend obliquely upwards in the direction of outside radial. During the bending operation, at one point in time, the upper ends of the ribs 21 will abut the outer side of the engaging portion 7, whereby the leverage effect can be further improved.

In the embodiment shown in Figures 6 to 12, the configuration of the upper opening 4, the peripherally extending outwardly extending flange 6, the cover 5, the peripherally extending flexed engagement portion 7, the ledge flange inward 8 and edge 9 correspond largely to that of the embodiment shown in Figure 1. However, the flexable edge section 12 is reinforced against a flexing by means of mutually spaced ribs 21 extending at right angles with respect to each other. to its longitudinal direction in a manner similar to the embodiment shown in Figures 4 and 5. However, as can be seen in Figure 6, in this embodiment, the upper ends 25 of the ribs 21, in the non-flexed position of the flexing edge section 12, positioned above the flexure 17 extend obliquely downwardly in the radially outward direction. Furthermore, it should be noted that the bending line 16, due to the ribs 21, is formed somewhat above the bending section 17 which is suitably located below the inwardly directed flange 8 of the lid 5. The bending line 16 is, however, formed below the inwardly directed flange 8. During the bending operation, at a point in time, the upper ends 25 of the ribs 21 will abut the outer side of the engaging portion 7, thereby which the leverage effect can be further improved. Because of, in the outward radial direction, the obliquely downward extension of the upper ends 25 of the ribs 21, the flexable edge section 12 must be bent to a still further position 12 'position indicated in Figure 6. , in which position the flexable edge section 12 may extend obliquely upward in the radially outward direction, before the upper ends 25 of the ribs 21 abut the outer side of the hook portion 7. This may be convenient in this embodiment, wherein the flexure section 17, according to the aforementioned, is suitably located below the inwardly directed flange 8 of the cover 5, and wherein the flexure line 16 is located below the inwardly directed flange 8. .

It should be noted that in the embodiment illustrated in Figures 4 and 5 as well as in the embodiment shown in Figures 6 and 12, the slots 22, 22 'are formed in the outer surface of the edge 9; however, they may equally well be formed on the inner surface of the edge 9. In the latter case, the grooves 22, 2 'may preferably extend no further than the lower area of the inwardly directed flange 8 of the cover 5, with the purpose of not fracturing through the flange.

In Figure 2 it is noted that, in the embodiment shown, the substantially straight side walls flex slightly in an outward direction. These can, for example, be curved with a radius of 2 meters, but it is also suitable with a radius of 30 centimeters or even less, while the curved corner section 10 of the outwardly directed flange 6 and the curved corner section 11 of the Inwardly directed flange 8 can be curved with a radius of approximately 3 centimeters. However, with the improvements according to the invention, the radius of the curved corner sections 10, 11 can be even smaller, such as approximately 1 to 2 centimeters. However, these spokes can also be suitably larger than 3 centimeters. The container can have any appropriate number of side walls 2.

Claims

1. A container comprising a number of side walls that meet at the corners, a bottom, an upper opening and a removable lid covering the upper opening, the upper opening being provided with a peripherally extending or directed outwardly extending rim, The lid is conditioned with a peripherally extending downwardly flexed engagement portion having an inwardly directed flange adapted to be gripped under the rim directed outwardly of the upper opening, the lid further being conditioned with an edge extending below the rim. engaging portion from the ledge directed inwardly thereof, the ledge facing outwardly of the upper opening and the corresponding inwardly directed flange of the lid having corner sections curved at the corners in which the sidewalls of the container meet. , the curved corner sections connect the side sections of the respective ridges, wherein at least one of the curved corner sections of the ledge facing inwardly of the lid is conditioned with a flexable edge section which is adapted to flex towards an outward directed position in such a way that a central part of at least one curved corner section of the ledge facing inwardly of the lid is leveraged away from the ledge facing outwardly of the upper opening and the engagement between the corresponding rims thereby weakening in an area in the part central, characterized in that the bending edge section is separated from the remaining part of the edge by means of two cuts or pre-cuts extending down from an area below the ledge directed into the lid by means of at least two slots formed on the outer surface of the rim and extending downward from an area in the bending line has In the lower edge of the edge, the grooves reduce the wall thickness of the edge so that the edge can fracture along the grooves for the purpose of flexing the flexed edge section to its outward facing position, the line of The flexure extends below the mutually contacting faces of the flange directed outwardly of the upper opening and the corresponding inwardly directed flange of the cover, respectively.

2. A container according to claim 1, characterized in that the flexible edge section is ready to flex on a line of flexure along which the material of the lid is weakened or on which the material of the lid is preformed. bent.

3. A container according to claim 1 or 2, characterized in that a bending line is formed in a bending section that connects the downwardly extending flexing engagement portion to the edge, and because the bending section has a side externally extending obliquely downward and outwardly, the outer side thereby forms an angle with both the peripherally bending downwardly engaging portion and the edge.

. A container according to any of the preceding claims, characterized in that a protrusion is formed proximate a flexure line and on the outer side of the engaging portion or on the outer side of the flexable edge section, and because the protrusion is adapted to be punctured between the flexable edge section and the engaging portion when the flexable edge section is bent toward its outward facing position.

5. A container according to any one of the preceding claims, characterized in that the bending edge section is reinforced against a bending along a line extending in its longitudinal direction, possibly by means of ribs extending at right angles to to its longitudinal direction.

6. A container according to any one of the preceding claims, characterized in that the bending edge section is reinforced against a bend along a line extending in its longitudinal direction by means of mutually spaced ribs extending at right angles to its longitudinal direction, the ribs have upper ends adapted to abut the outer side of the engaging portion when the bending edge section is flexed to its outward facing position.