CH713381A1 - Cover with edge and packaging arrangement. - Google Patents

Abstract

Cover (1) having an edge, which comprises a clamping and stiffening bead (3) which on the inside over the edge distributed clamping portions (4) for generating a releasable clamping connection between an opening edge of a container and the lid (1), wherein the clamping portion (4) a first, second and third in the bead (3) projecting clamping projection (4-1, 4-2, 4-3), wherein the first clamping projection (4-1) on one side of the bead (3) and the second and third clamping projections (4-2, 4-3) are arranged on the other side of the bead (3), the first clamping projection (4-1) being arranged opposite between the second and the third clamping projections (4-2, 4) 3) is arranged and designed such that an opening edge pushed into the bead (3) can be pressed at least partially between the second and the third clamping projection (4-2, 4-3) by the first clamping projection (4-1).

Description

Description: The invention relates to a lid with an edge, which comprises a clamping and stiffening bead. Furthermore, the invention relates to a packaging arrangement which comprises a trough-shaped container containing an opening edge and a lid which removably closes the container.

Lids for closing containers are well known. Here, e.g. For secure closure, a lid made of plastic or cardboard is provided with an edge in such a way that the edge, when placed on the container, engages over a bead provided on the container and thus seals the container and also makes it resealable.

In contrast, an object of an embodiment of the invention can be seen in providing a lid that allows a safe closing of a container even if the opening edge of the container surrounding the opening edge is smooth or structure-free and possibly also thin-walled.

According to one aspect, the embodiment provides a lid with an edge which comprises a clamping and stiffening bead which has clamping sections on the inside distributed over the edge for producing a releasable clamping connection between an opening edge of a container and the cover, the clamping section having one comprises first, second and third clamping protrusions protruding into the bead, the first clamping protrusion being arranged on one side of the corrugation and the second and third clamping protrusions on the other side of the corrugation, the first clamping protrusion being arranged opposite between the second and the third clamping protrusion and is designed such that an opening edge inserted into the bead can be at least partially pressed between the second and the third clamping projection by the first clamping projection.

By providing for the first time with a lid a clamping and stiffening bead with at least one clamping section or, if necessary, with a plurality of evenly distributed clamping sections distributed over the bead, and the or the clamping section is characterized in that it has a first, second and third Has clamping projection, between which an opening edge of a container can be clamped such that the opening edge can be pressed at least partially between the second and the third clamping projection by the first clamping projection, the unique possibility arises with the lid according to the invention of also closing containers that were not previously secure were lockable because their edge was not provided with beads, undercuts, clamping reinforcements or in some other way, such as with a thin-walled cardboard container, did not have the stability to be able to be closed with a lid by jamming or latching.

A strength according to the embodiment of the invention can be seen in the fact that non-positive connection points created by the individual clamping sections due to pressure and friction are created, which already have a holding function in relation to the container or its container edge or the container wall , Furthermore, it is advantageously achieved by the clamping sections according to the invention that due to the wave-like jamming of the container edge - the edge runs, namely in the clamped state, wave-like past the projections - the length is shortened, whereby the edge against the inside of the clamping and Stiffening bead is pressed, so that an additional clamping effect is achieved.

In the context of the invention, it has proven to be expedient and advantageous if the beading of the first clamping projection and the second and third clamping projection overlap at least partially in terms of height. The latter in particular when the container edge is relatively thin-walled, because the overlap in terms of height ensures in particular that the opening edge can be pressed by the first between the second and third clamping projections. The degree of overlap causes the strength of the wave-like shape of the opening edge in the seat between the clamping projections, the thinner the wall thickness of the edge, the greater the overlap is preferred. That the degree of overlap decreases with the wall thickness of the edge. Or vice versa, the thinner the edge, the more preferably the vertical overlap.

The height overlap takes place after the clamping projections according to the invention in particular by the clamping maxima, which are formed on the clamping projections. According to the invention, a vertical overlap is understood in particular to mean that the first clamping projection inside the clamping and stiffening bead on its opposite side cannot be pushed past the second and / or third opposing clamping projection at least at the level of the clamping maxima with an imaginary displacement on its bead side would.

According to a further advantageous development of the invention, the clamping maximum of the first clamping projection is offset with respect to the bead base both to the clamping maximum of the second and the third clamping projection. The offset arrangement creates an insertion slot or insertion area between the clamping projections, through which the opening edge can be pushed in a simple manner. If the clamping projections or their clamping maxima are arranged in this way, it is possible that the opening edge can be pushed into the bead without the bead having to be widened when inserting it, because by pushing in above the insertion area, the opening edge can be directly in the corrugated clamping position be guided between the projections.

CH 713 381 A1 [0010] The respective offset and / or overlap is based in particular on the thickness or thickness of the opening edge. It can be said that the thinner the edge, the smaller the offset and, as already stated, the greater the overlap.

It has also proven to be advantageous if the clamping maxima of the second and third clamping projection are arranged in a line parallel to the bead base. With such an alignment it can be achieved that the opening edge can be pushed as evenly as possible or straight between the clamping projections. In this case, an acute-angled triangle lying diagonally in the room can be thought of between the clamping maxima.

Furthermore, it has been shown in various applications that it can be advantageous for a uniform clamping effect if the first clamping projection is arranged centrally between the second and third clamping projection. This type of alignment of the first clamping projection has advantages over the second and third clamping projections also for the most uniform possible insertion of the opening edge.

For the special case that the second and third clamping protrusion is arranged in a line parallel to the bead base and the first clamping protrusion is offset centrally opposite, the connecting lines between the clamping maxima can be described as an isosceles triangle lying in space.

A possible expedient embodiment according to the invention can consist in that the first clamping projection is arranged on the outside and the second and the third clamping projection are arranged on the inside in the bead. Such an arrangement is particularly useful when the opening edge extends obliquely outwards and accordingly enters the bead obliquely and possibly even conically with respect to the outside of the wall of the clamping and stiffening bead. In this case, the opening edge then hits the first clamping projection first and can then be pressed or guided into the space between the second and third clamping projection.

[0015] Furthermore, a further advantageous embodiment according to the invention is to design the clamping projections in the form of knobs. According to the invention, knobs are understood to mean bump-like elevations on a surface. The advantage of knobs is that they can be arranged specifically on the inside of the beads to ensure a secure press fit.

But it can also be advantageous according to the invention if at least the second and the third clamping projection is wedge-shaped. The wedge shape offers the advantage that the opening edge along the projections in the clamping and stiffening bead is given a lateral guide, so that no tilting occurs in the bead and in particular along the bead base, which could negatively affect the secure fit of the opening edge in the bead. Accordingly, a wedge shape, a wedge-like shape or a comparable sliding piece can of course also be advantageous, additionally or alternatively, for the first clamping section.

The bead is expediently formed by a bead bottom and a first and second wall, the first wall starting from the bead bottom extending obliquely inwards and the second wall extending obliquely outwards from the bead bottom. The clamping and stiffening bead is given a roof-like shape, which is very suitable for guiding the opening edge onto the bead base. In this way, the lid for closing the container can initially be placed loosely on the container and, due to the roof-like shape, centers itself along the opening edge before it is transferred or pressed with a certain pressure into the clamping position caused by the clamping sections. In addition, this design results in very good stiffening of the lid and edge.

It can also be advantageous if the second wall contains a bead protrusion, which then enables self-centering of the lid on the container or the opening edge even better with respect to the opening edge. In addition, a better stiffening of the edge or the clamping and stiffening bead can be achieved by the bead protrusion. In addition, the elongated second wall also gives the possibility of a freer or more targeted arrangement of the first, or the second and third clamping projection.

According to a preferred embodiment, the second bead wall including bead projection has a height of 10 mm to 20 mm, further preferably a height of 12 mm to 18 mm and very particularly preferably a height of 14 mm to 16 mm. Especially in the latter area, but also beyond, a particularly good self-centering of the lid on the container has been achieved according to the invention.

In particular for additional stiffening of the edge or the clamping and stiffening bead, the second wall can at least partially have a corrugated structure on which the clamping projections can be impressed. The latter preferably where one of the wave peaks characterizing the wave structure at least tends to protrude into the bead.

An additional effect, particularly with a view to further stiffening the edge, can also be achieved by the second wall having an outwardly projecting end edge, which then forms the outer end of the edge.

Conveniently, the lid also includes a hood that shoots the lid upwards, which is connected to the first wall and thus to the edge via a connecting web.

CH 713 381 A1 [0023] An advantageous further development according to the invention can also be seen in that sliding and centering projections are provided on the closure side which are evenly distributed over the edge and which preferably protrude at least partially from the connecting web and which preferably corresponds to an extension of the second inner wall side of the bead , so that the sliding surface forms a smooth transition to the inside of the bead wall. In addition, the sliding and centering projections also have a stiffening function for the lid and the edge.

A particularly preferred embodiment provides that the sliding surface is matched to the size of the container in such a way that it slides along or slides parallel to the edge of the opening when it is put on. The sliding surface also forms a support surface for the opening edge in such a way that the length contraction of the opening edge caused by the clamping sections produces an inward force effect, which can then be intercepted not only by the first bead wall, but also increasingly by the sliding surface, which in the Result leads to an improved clamping fit of the lid on the container.

According to a preferred embodiment, the lid is derived from a rectangular basic shape and the sliding and centering projections are advantageously located in the corner areas of the lid. This not only has the advantage that such a lid is stiffened even better, especially in the corners, it also means that the lid can be placed even better loosely, self-centering on the container, because this is particularly the case with square containers especially in the corner areas when putting lids on, it tends to tilt, in order to be pressed even more easily into the clamping and stiffening bead. Furthermore, the contraction effect described above brings about increased active forces in a corner derived from a square, particularly in the corner areas, which can be intercepted by the sliding surface - the latter in particular when the sliding surface runs along the corner and thus quasi-negatively depicts the course of the opening edge - whereby an improved clamping hold between the lid and the container is achieved.

It has also proven to be advantageous if corner flattenings are provided in the corner regions of the bead, which in particular also prevent the opening edge on the lid from tilting there. The latter applies in particular if the container is made of folded cardboard, since the folding often reinforces the edges due to a folded multilayer, which can be the reason for a corner tilt.

In addition to the features according to the invention already set out, it can be expedient and advantageous according to the invention if at least one step projection is provided in the bead on the first bead wall, which is in the bead opposite the first clamping projection or outside the clamping area compared to a securing projection on the second bead wall is arranged. In the first case, the first clamping projection corresponds to the securing projection. Functionally, e.g. a tab wing cut out in the opening wall can be pressed out of the opening wall in such a way that the free lower end of the tab wing faces the step projection. The flap wing forms a kind of barb with reference to the step, so that the edge of the lid does not slip out of the clamping and stiffening bead even when larger forces exceed the normal pull the opening edge. The latter can be the case if the lid is pulled violently or if the lid is to carry particularly heavily loaded containers. It may be advantageous to evenly arrange a plurality of securing projections with an opposing step projection over the bead edge, preferably in the corner areas in the case of a container with corners. In addition, by the fact that the securing protrusion presses in the tab wing, in addition a noise effect can also be achieved which, in particular in the case of first use, can indicate to the user when the lid is seated correctly and thus firmly on the container.

According to a further aspect according to the invention, the embodiment provides a packaging arrangement which comprises a trough-shaped container containing an opening edge and a cover which removably closes the container, the cover having a clamping and stiffening bead in the sense described above. The opening edge can take any shape, such as polygonal, round, or oval. The shape of the clamping and stiffening bead can easily be adapted to the shape in question in the positive deep-drawing process preferred according to the invention.

According to a preferred embodiment, the opening edge of the container extends obliquely outwards at an angle greater than or equal to 90 degrees, as a result of which the opening edge is pressed inwards by the clamping and stiffening bead or the second bead wall or the first clamping projection, which is in accordance with the invention can lead to a first or further clamping effect on the opening edge. As already described above, this effect can be further enhanced if the second bead wall extends obliquely outwards and thus the bead wall and the opening edge run counter-conically to one another. Of course, containers with other wall inclination angles can also be used and provided according to the invention.

A further advantageous embodiment of the packaging arrangement according to the invention also consists in the fact that at least one step projection is provided in the bead on the first bead wall, which is arranged in the bead opposite the first clamping projection or outside the clamping area with respect to a securing projection on the second bead wall and the opening edge has a flap which can be pressed from the opening edge on three sides and has an upper fixed end and a lower free end, which can be pressed out of the opening edge in the direction of the first corrugation wall by the first clamping projection or the securing projection in such a way that the free end is pushed into the corrugation State of the opening edge is opposite the locking projection. In this way

CH 713 381 A1, the additional positive effect can be achieved that the free end of the tab wing forms a barb against the safety projection, which prevents the opening edge from being pulled out even with greater forces, e.g. if heavier loads are to be absorbed by the container. In addition, a noise can also be generated in this way, namely in that the securing projection pushes the tab wing out of the opening edge and when pulling out when the tab wing is pulled over the step projection.

In a preferred embodiment, in particular the lid consists of a thermoformed, preferably positively thermoformed plastic material, the opening edge and / or the container preferably being made of cardboard material and further preferably consisting of a folded and / or glued cardboard flat material. The advantage of this combination, which is not, however, mandatory for the invention, lies in particular in the fact that both can be produced in a very simple, inexpensive and mass-compatible manner. In addition, the lid and the container can advantageously be fed to separate recycling circuits, which enables simple recycling of the lid and container.

The cover is preferably deep-drawn based on a plastic film, preferably a transparent plastic film, with a thickness of preferably 300 microns to 600 microns. Plastic foils with a thickness of 350 micrometers to 550 micrometers are also particularly preferred. It can basically be said that the thickness of the film is inversely related to the thickness of the flat cardboard, so that a thin cardboard, which forms a weak wall or opening edge for a container, requires a stronger plastic film for the lid, since a weaker one or more unstable carton requires a stiffened lid. The stiffness of the lid naturally depends not only, and possibly not primarily, on the plastic film thickness, but rather on a combination of targeted material selection and targeted embossing of the lid according to the invention. If the film is transparent, this has the advantage that the goods to be covered with the lid, e.g. warm or cold vegetables that remain visible from the outside.

According to the invention, the thickness of the cardboard preferably ranges from 150 micrometers to 600 micrometers. The following thicknesses are particularly preferred for the carton: 205, 235, 260, 300, 330, 360, 395, 435, 465 or 505 microns.

Further features, advantages, effects and details emerge from the following description, in which at least one embodiment is described in detail with reference to one or more drawings, if necessary. Described and / or depicted features form the subject matter, either individually or in any meaningful combination, possibly also independently of the claims, and in particular can also be the subject of one or more separate applications. Identical, similar and / or functionally identical parts are provided with the same reference symbols.

[0035] Here shows schematically:

Fig. 1 Fig. 2 Fig. 3 Fig. 4th

Fig. 5a

Fig. 5b

Fig. 6a

Fig. 6b

Fig. 7

8 shows a perspective view of a cover according to the invention from above;

a perspective view of the inventive lid according to Figure 1 from below.

a section of the lid according to the invention of Figure 2 with a slightly changed perspective.

a lid edge section of the lid of Figure 1, seen from below with inserted and separated from the rest of the container opening edge.

a section through the lid edge section of Figure 4 at A-A, the lid is loosely placed on an opening edge.

a section through the lid edge section of Figure 4 at A-A, the opening edge is pressed into the gill stiffening bead.

a section through the lid edge section of Figure 4 at B-B, the lid is loosely placed on an opening edge.

a section through the lid edge section of Figure 4 at B-B, the opening edge is pressed into the gill stiffening bead.

a section through the lid edge cutout in the sense of FIG. 4 outside of a clamping area 4, an additional edge securing device 16 being formed in the clamping and reinforcing bead 3 is a container according to the invention with outwardly facing walls.

1 shows a perspective view of a possible embodiment of a cover 1 according to the invention. The cover 1 described here is a part with a deep-drawn part made of transparent plastic

CH 713 381 A1 within the tolerances, structure that can be individually shaped. It should be emphasized that the lid was manufactured in a single deep-drawing process step without the need to change the deep-drawing tool.

The lid 1 according to FIG. 1 has a lid rim 2 in addition to a lid hood 7. The edge 2 is connected in one piece to the cover hood 7 via the connecting web 8. In addition to the web 8, the edge 2 also includes the first bead wall 3-1 forming the bead 3, the second bead wall 3-2 and the bead base 3-3. The beaded floor

3- 3 forms a one-piece transition between the first and second bead walls 3-1 and 3-2 (see also FIGS. 2 and 3). The double embossing of the second bead wall 3-2 can also be seen from FIG. 1. On the one hand, there is the bead 3, i.e. inwardly directed first clamping projection 4-1 in the clamping area 4 and the corrugated structure 6. The corrugated structure 6 serves in particular to stiffen the second corrugated wall 3-2 and thus the edge 2. It includes wave valleys 6-1 and wave crests 6-2. The wave crests 6-2 are directed inwards into the bead 3 and the first clamping projections 4-1 are arranged or stamped thereon. The lid 1 is also stiffened by the roof-like structure of the bead walls 3-1,3-2 and the bead bottom 3-3. Furthermore, the end edge 11 and the four corner stiffeners 12 are also involved in stiffening the cover 1.

Fig. 2 shows a perspective view of the lid 1 of Fig. 1 from below. The clamping sections 4 can be seen here. The long sides of the cover 1 have three clamping sections 4 and the transverse sides each have a clamping section 4. The clamping sections have a first, second and a third clamping projection 4-1, 4-2 and 4-3, which project in height into the clamping and reinforcing bead 3. The first clamping projection 4-1 projects centrally between the area between the second and the third clamping projection 4-2 and 4-3. The clamping projections have areas of maximum height or maximum height embossing with reference to the bead walls 3-1,3-2, which run obliquely towards the bead base 3-3, similar to a house roof. These are the clamping maximum 5-1 of the first clamping projection 4-1, the clamping maximum 5-2 of the second clamping projection 4-2 and the clamping maximum 5-3 of the third clamping projection

4- 3. The second clamping maximum 5-2 and the third clamping maximum 5-3 are aligned in terms of height with respect to the bead base 3-3 (see also FIG. 3). The first clamping maximum 5-1 is offset in height from the second and the third clamping maximum 5-2, 5-3. The first clamping maximum 5-1 with reference to the second and the third clamping maximum 5-2, 5-3 protrudes into the clamping and stiffening bead 3 in such a way that an imaginary plane 13 which is perpendicular to the one through the opening edge 14 (FIG. 4 ) surrounding closure level and the second and third clamping maximum 5-2, 5-3 tangent, intersects the first clamping projection 4-1.

2 also shows the wave structure 6 of the second corrugation wall 3-2. The wave structure 6 is characterized by wave troughs 6-1 and wave crests 6-2, the first clamping projection 4-1 preferably being placed on a wave crest 6-2. The end edge closes the edge area 2 of the lid 1.

In addition, Fig. 2 shows the connecting web 8, which connects the hood 7 with the first bead wall 3-1. Sliding and centering projections 9 can be seen in the corner areas of the underside of the lid, which protrude there from the plane of the connecting web 8-1 and have sliding surfaces 9-1, which on the inner surfaces of the opening edge 14 (FIGS. 4b, 5b) of a container 15 (Fig. 8) are aligned so that the lid 1 can already self-centering on the container 15 when it is loosely placed on the container 15, in particular along the sliding surfaces 9-1, in order to be able to do so from there and being pushed into its mounting position.

From Fig. 3, an enlargement of the left side of FIG. 2 can be seen in a slightly changed perspective. 3 therefore shows the bead 3 with the first, i.e. the inner bead wall 3-1, the second, i.e. the outer bead wall 3-2 and the bead base 3-3. The second corrugated wall 3-2 is stamped with a wave structure 6 and clamping projections 4-1 in the form of clamping knobs. The wave structure 6 has valleys 6-1 and mountains 6-2. The four clamping knobs 4-1 provided there are arranged on wave crests 6-2 of the wave structure 6. The clamping projections 4-1 and in particular their clamping maxima 5-1 protrude into the areas between the second and the third clamping projection

4- 2, 4-3, which are arranged in the clamping and stiffening bead 3 on the inner bead wall 3-1 of the first clamping projection 4-1. The clamping projections 4-2 and 4-3 are wedge-shaped on the inside of the bead wall 3-1. That they flatten in the direction of Sickenboden 3-3. These clamping projections 4-2, 4-3 have flanks 4-4 on the sides, which are connected via a rounded edge area 4-5, which serves to guide the opening edge. It can also be seen there that the first clamping maximum 5-1 relative to the clamping maxima

5- 2, 5-3 of the second and third clamping protrusions 4-2, 4-3, which lie substantially on a horizontal line, are arranged lower, i.e. it is closer to the bead base 3-3 than the opposite clamping maxima 5-2, 5-3. This relative offset leads to the fact that despite the vertical overlap of the opposing clamping projections 4-1, and 4-2 and 4-3, a clamping gap 4-6 arises between the first clamping projection 4-1 and the clamping projections 4-2 and 4-3 , between which the opening edge 14 can be pushed.

3, the sliding and centering projections 9 can be seen with a sliding surface 9-1 guided around the corner, the sliding surface 9-1 being chamfered and so geometrically matched to the course of the container opening edge 14 that it is used for Self-centering of the lid on the container comes.

Furthermore, in the lower corner of the lid 1 according to FIG. 3, the corner flattening 10 can be prevented, which prevents canting when the container is placed or pressed on in the corners of the lid 1. The latter is particularly the case if the edge region and in particular the opening edge 14 is thicker in the corner regions than in other places in containers folded from cardboard.

CH 713 381 A1 [0044] FIG. 4 shows a lid edge section of the lid 1 according to FIGS. 1 to 3, seen from below, the opening edge 14 being shown cut off or separated from the rest of the container in the clamping and stiffening bead 3. It can be seen there that the opening edge 14 runs along clamping projections 4-1, 4-2 and 4-3 of the various clamping sections 4, due to the clamp fit in the clamping sections 4, which also causes a shortening of the opening edge 14, which leads to an additional clamping effect between the inside of the bead and the edge of the opening. The vertical overlap of the clamping projections 4-2 and 4-3 with the first clamping projection 4-1 is also clearly visible. Furthermore, the wave structure 6 of the second corrugation wall 3-2 with wave troughs 6-1 and wave crests 6-2 can be clearly seen again in FIG. 4.

Fig. 5a shows a section through a lid edge section of Fig. 4, namely at position A-A (Fig. 4). In contrast to Fig. 4, the opening edge 14 is not pressed into the bead 3, but the lid 1 is self-centered on the opening edge 14. According to this embodiment, the opening edge 14 tilts outwards, i.e. it has a defined angle of more than 90 degrees to the horizontal. 5a: The oblique side flank of the hood 7, the connecting web 8, the clamping and stiffening bead 3 with the first bead wall 3-1, the bead base 3-3, the second bead wall 3-2 and the overhang of the second bead wall

3 - 4, which also contributes to the self-centering of the cover, since it covers the opening edge 14 prematurely when the cover 1 is placed on. A height h (see FIG. 6a) of the second bead edge 3-2, which extends vertically from the top of the bead bottom 3-3 to the underside of the end edge 11, which is also shown in FIG. 5a, has proven advantageous. The second bead wall 3-2 is stamped with the cam-shaped or knob-shaped first clamping projection 4-1, i.e. Fig. 5a shows at this point the section through the first clamping projection 4-1 and thus its profile. The lower knob flank or the lower part of the corrugation wall 3-2 runs obliquely outwards and thus counter-conical to the opening edge 14. Because of this, the top edge 4-1 of the opening edge 14 does not slide directly into the clamping gap 4-6, but remains on the underside of the first clamping projection 4-1. By pressing the cover 1 again, the upper edge 14-1 is then pressed over the curved knob 4-1 and slides into the clamping gap

4-6 between the offset clamping projections 4-1, 4-2, 4-3 (see Fig. 4) and along the same (see Fig. 5b and Fig. 6b). The first clamping maximum 5-1 lies below the second and third clamping maximum 5-2, 5-3 (see FIG. 4).

Fig. 5b now shows the state in which the opening edge 14 of the container 15 is inserted and is clamped there between the clamping projections 4-1,4-2, 4-3. The position of the upper edge of the opening 4-5 depends, among other things, on the relative position of the clamping projections 4-1, 4-2, 4-3 and their geometric shape, including the degree of overlap. In addition, the position is also influenced by the wave structure 6 of the second bead wall 3-2, if such a structure is provided at all.

Figures 6a and 6b describe the same scenario with respect to one of the clamping projections 4-2 or 4-3, i.e. the second or the third clamping projection, the opening edge 14 initially does not come into contact with the clamping projection 4-2, the profile of which is stamped on the first bead wall 3-1 and thus also at the point BB (FIG. 4) according to FIG. 6a can be seen in the cut. This has to do with the container wall 15-1 running diagonally outwards. Only when, after loosely fitting the cover 1 (state in FIG. 6a), the opening edge 14 is pushed into the clamping and reinforcing bead 3, is the opening edge 14 of the edge region 4-5 of the wedge-shaped clamping projections 4-2 and 4-3 in the bead 3 is guided and abuts the same (Fig. 6b) and presses the opening edge 14 inwards, ie in the bead 3.

FIG. 7 shows a section through the lid edge cutout in the sense of FIG. 4 outside a clamping area 4, an additional edge securing device 16 being formed in the clamping and reinforcing bead 3. The edge securing 16 is characterized in that several pairs or possibly only one pair of mutually opposing projections 16-1, 16-2 are provided along the bead 3. The projections 16-1, 16-2 are a securing projection 16-1 and a securing step 16-2. The securing projection 16-1 lies on the side of the second corrugation wall 3-2 and gives it an additional character and the securing step 16-2 is offset downwards or slightly downwards opposite it on the side of the first corrugation wall 3-1. It is also characteristic of the edge securing device 16 that the opening edge 14, when it is seated in the bead 3, has a rectangular tab wing 17 which is pre-punched on three sides from the opening edge 14 at the location of the pair of projections 16-1 the opening edge 14 is pressed, a window fully or partially releases. The die cuts run laterally and at the bottom of the rectangle. The upper rectangular line remains firmly connected to the opening edge 14 without a cut and forms the hinge of the flap wing which can be folded out or expressed from the opening edge plane

17. The edge securing device 16 according to the invention functions in such a way that when the opening edge 14 is pushed into the bead 3, the securing projection 16-1 presses the tab leaf 17 out of the opening edge 14 and the bottom tab edge 17-1, i.e. The free lower end of the flap wing 17 is positioned in relation to the securing step 16-2 in such a way that the lower flap wing edge 17-1, when an attempt is made to pull the opening edge 14 out of the bead 3, is edged on the securing step 16-2 and so the flap wing 17 In the manner of a barb together with security level 16-2, it is difficult or impossible to push it out of the bead. The latter at least only up to a maximum pulling effect on the opening edge 14 or the tab wing 17, which is dependent on various aspects, such as e.g. the thickness of the opening edge 14 and the geometric shape of the projections 16-1, 16-2. In this respect, influencing factors are also the height protrusion of the securing step 16-2 and / or the securing protrusion 16-1 into the bead 3, which determines whether the lower flap wing edge 17-1 may only be close to the step edge 16-3

CH 713 381 A1 abuts or completely and / or lies deep on level 16-2. It should also be considered whether the step edge 16-3 may be rounded or not. And of course the degree of inclination of the security level 16-2, away from the security projection 16-1, also plays a role in the design of the edge security 16.

8 shows a container 15 with outwardly projecting walls 15-1, which can be closed within the scope of the invention with a cover 1 according to the invention. It is a container or container 15 folded and glued from a simple and thin-walled cardboard, which could only be closed with difficulty, if at all hitherto, with a lid, because its container wall 15-1 / opening edge 14, i.e. the part of the container wall 15-1 which, according to the invention, sits in the bead 3 does not have the necessary rigidity and, moreover, does not have any structural fastening elements, such as e.g. has a bead, which enable secure closing with a lid 1.

8, the tab wings 17 required for the additional edge securing 16 according to the invention can be seen, in each case two on one of the long sides of the container wall 15-1. To form the tab wings 17, three cuts 18 are punched, so that a square or rectangular tab wing 17 is formed which is connected to the opening edge 14 only on one side, namely on the upper side thereof. The upper side has a hinge function within the framework of the edge securing 16, so that the tab wing 17 can be pressed laterally out of the opening edge 14 by the securing projection 16-1.

It is to be understood that the above detailed description and the drawings represent certain exemplary embodiments of the invention, but that they are only intended for the purpose of illustration and should not be interpreted as restricting the scope of the invention. Various modifications of the described configurations are possible without leaving the scope of the following claims and their range of equivalents. In particular, this description and the figures also show features of the exemplary embodiments which are not mentioned in the claims. Such features can also occur in combinations other than those specifically disclosed here. The fact that several such features are mentioned in the same sentence or in a different type of textual context does not therefore justify the conclusion that they can only occur in the specifically disclosed combination; instead, it can generally be assumed that several of such features can also be omitted or modified, provided that this does not call into question the functionality of the invention.

For the entire description and the claims, the expression "a" is used as an indefinite article and the number of parts is not limited to a single one. If "a" has the meaning of "only one", this is to be understood by the person skilled in the art from the context or is clearly disclosed by using suitable expressions such as "a single".

Reference symbol list [0053]

cover

edge

Beading, clamping and stiffening bead

3-1 first corrugation wall

3-2 second bead wall

3-3 surround

3- 4 protrusion of the second bead wall

clamping portions

4- 1 first clamping projection, clamping knob

4-2 second clamping projection, clamping knob 4-3 third clamping projection, clamping knob

4-4 flanks of the clamping projections 4-2 and 4-3 4-5 edge area of the clamping projections 4-2 and 4-3 4-6 clamping gap

terminal maxima

CH 713 381 A1

5-1 first clamping maximum 5-2 second clamping maximum 5-3 third clamping maximum 6 wave structure 6-1 troughs 6-2 crests 7 cover hood 8th connecting web 8-1 Connecting web level 9 Sliding and centering projections 9-1 sliding surface 10 Eckabflachungen 11 end edge 12 gusset 13 imaginary section plane 14 Opening edge of a container 14-1 Top edge of the opening edge 14 15 container 15-1 Container wall 16 edge protection 16-1 securing projection 16-2 Rating level 16-3 step edge 17 Lasch wings 17-1 Lasch wing lower edge 18 slice H Height of the second corrugation wall

Claims (29)

claims 1. Lid (1) with an edge (2), which comprises a clamping and stiffening bead (3) which on the inside distributes clamping portions (4) over the edge (2) to produce a releasable clamping connection between an opening edge 14 of a container 15 and the cover (1), the clamping section (4) comprising a first (4-1), second (4-2) and third (4-3) projecting into the bead (3) clamping projection (4), the first Clamping projection (4-1) on one side of the bead (3) and the second (4-2) and third (4-3) clamping projection is arranged on the other side of the bead (3), the first clamping projection (4-1 ) is arranged opposite between the second and the third clamping projection (4-2, 4-3) and is designed such that an opening edge (14) pushed into the bead (3) by the first clamping projection (4-1) at least partially between the second (4-2 and third (4-3) clamping projection (4-2, 4-3) can be pressed. 2. Lid (1) according to claim 1, wherein the first clamping projection (4-1) and the second (4-3) and third (4-3) clamping projection overlap at least partially in height in the bead (3). CH 713 381 A1 3. Lid (1) according to claim 1 and / or 2, wherein the clamping projections (4-1, 4-2, 4-3) form clamping maxima (5-1, 5-2, 5-3) and the clamping maximum (5th -1) of the first clamping projection (4-1) with respect to the bead base (3-3) both to the clamping maximum of the second (5-2) and the third clamping projection (5-3) is arranged offset. 4. Lid (1) according to claim 3, wherein the clamping maxima (5-2, 5-3) of the second and third clamping projection (5-2, 5-3) are arranged in a line parallel to the bead base (3-3). 5. Lid (1) according to one or more of the preceding claims, wherein the first clamping projection (4-1) is arranged centrally between the second (4-2) and third (4-3) clamping projection. 6. Lid (1) according to one or more of the preceding claims, wherein the first clamping projection (4-1) on the outside and the second and third clamping projection (4-2, 4-3) on the inside in the bead (3) is arranged. 7. Lid (1) according to one or more of the preceding claims, wherein at least the first clamping projection (4-1) is knob-shaped. 8. Lid (1) according to one or more of the preceding claims, wherein at least the second and the third clamping projection (4-2, 4-3) is wedge-shaped. 9. Lid (1) according to one or more of the preceding claims, wherein the bead (3) is formed by a bead base (3-3) and a first (3-1) and second (3-2) bead wall. 10. Lid (1) according to claim 9, wherein the first bead wall (3-1) starting from the bead base (3-3) extends obliquely inwards and the second bead wall (3-2) starting from the bead base (3-3) obliquely runs outside. 11. Lid (1) according to claim 9 and / or 10, wherein the second bead wall (3-2) includes a bead protrusion (3-4). 12. Lid (1) according to one or more of claims 9 to 11, wherein the second bead wall including bead projection (3-4) has a height (h) of 10 mm to 20 mm or a height (h) of 12 mm to 18 mm or has a height (h) of 14 mm to 16 mm. 13. Lid (1) according to one or more of claims 9 to 12, wherein the second wall (3-2) at least partially has a wave structure (6). 14. Lid (1) according to one or more of the preceding claims, wherein the lid (1) has a hood (7) which is connected to the first wall (3-1) via a connecting web (8). 15. Lid (1) according to one or more of the preceding claims, wherein protruding sliding and centering projections (9) are provided evenly distributed over the edge (2) on the closure side. 16. Lid (1) according to claim 15, wherein the sliding and centering projections (9) has at least one sliding surface (9-1) which is aligned along the opening edge (14). 17. Lid (1) according to one or more of claims 15 to 16, wherein the sliding and centering projections (9) project at least partially from the connecting web (8). 18. Lid (1) according to one or more of the preceding claims, wherein the lid (1) is derived from a rectangular basic shape and the sliding and centering projections (9) are provided in the corner regions of the lid (1). 19. Lid (1) according to claim 18, wherein in the corner regions of the bead (3) corner flats (10) are provided. 20. Lid (1) according to one or more of the preceding claims, wherein in the bead (3) on the first bead wall (3-1) at least one securing projection (16-1) is provided, which in the bead (3) compared to the the first clamping projection (4-1) or outside the clamping area opposite a securing projection (16-1) on the second bead wall (3-2). 21. Packaging arrangement comprising: a trough-shaped container (15) containing an opening edge (14) and a cover (1) releasably closing the container (15), the cover (1) being a clamping and stiffening bead (3) according to one or more of the previous claims. 22. Packaging arrangement according to claim 21, wherein the opening edge (14) extends obliquely outwards at an angle greater than 90 degrees. 23. Packaging arrangement according to claim 21 and / or 22, wherein in the bead (3) on the first bead wall (3-2) at least one securing projection (16-1) is provided, which in the bead (3) relative to the first clamping projection ( 4-1) or outside the clamping area opposite a securing projection (16-1) is arranged on the second bead wall (3-2) and the opening edge (14) is a tab wing (17) which can be pressed on three sides from the opening edge (14) and has an upper fixed one End and a lower free end which can be pressed by the first clamping projection (4-1) or the securing projection (16-1) in the direction of the first bead wall (3-1) from the opening edge (14) that the free end in the state of the opening edge (14) pushed into the bead (3) relative to the securing projection (16-1). 24. Packaging arrangement or lid (1) according to one or more of the preceding claims, wherein the lid (1) consists of a thermoformed plastic film. CH 713 381 A1 25. The packaging arrangement of claim 24, wherein the plastic film has a thickness of 300 microns to 600 microns or a thickness of 350 microns to 550 microns. 26. Packaging arrangement or lid (1) according to one or more of claims 21 to 25, wherein the opening edge (14) and / or the container (15) consist of cardboard material. 27. Packaging arrangement according to one or more of claims 21 to 26, wherein the container (15) consists of a folded and / or glued cardboard blank. 28. Packaging arrangement according to one or more of claims 26 to 27, wherein the carton has a thickness of 150 microns to 600 microns. 29. The packaging assembly of claim 28, wherein the thickness of the carton is 205, 235, 260, 300, 330, 360, 395, 435, 465 or 505 microns. CH 713 381 A1 CH 713 381 A1 CH 713 381 A1 Figure 3 CH 713 381 A1 CH 713 381 A1