EP3877282B1 - Packaging with tamper-evident seal - Google Patents

Description

The invention relates to a packaging comprising, on the one hand, a container having side walls meeting at corners, a bottom and an upper opening, as well as a lid intended to close off the upper opening of the container.

Technical area

The field of the invention is that of plastic packaging obtained conventionally by injection molding of the lid and of the container. the other, elastically.

Prior technique

It is known from the state of the art a packaging in which the container and the lid respectively have a first engagement part, at the level of the upper opening of the container, and a second engagement part, on the periphery of the lid. intended to fit one inside the other, elastically.

The first cover engagement portion includes an outwardly extending ridge extending around the periphery, the second cover engagement portion having an inwardly directed ridge disposed on a skirt second engagement part, which is able to hook below the edge directed towards the outside of the container, to ensure the locking of the lid on the container.

The outward facing edge of the container, on the one hand, and the inward facing edge of the lid, on the other hand, have curved angle sections in the corners where said side walls meet, said sections curved angles connecting the side sections of the respective edges.

In such a state of the art, the positioning and locking of the lid on the container is put in place by force, conventionally by means of a jack actuator which presses the center of the lid in order to cause the interlocking of the first engagement part of the container in the second engagement part, and until the edge directed towards the inside of the lid, passes over the edge facing the outside of the container. The mutually engaging surfaces between the two edges oppose detachment of the cover.

The removal of the cover is typically carried out by the end user, and may prove difficult for some, or even require the aid of a tool such as a screwdriver to detach the cover from the container.

However, the state of the art knows such packaging equipped per se with functional parts of the lid and/or of the container, making it possible to facilitate the removal of the lid.

One of the solutions is disclosed by the document EP 0 110 859 and includes providing a collapsible skirt section on the lid, at one of the curved angle sections of the inwardly facing ridge, hinged to a folding area, such as a flexible hinge, at the top of the second engagement portion of the cover. This collapsible skirt section is operable to fold from an engaged position to an outwardly directed position such that a central portion of said at least one inwardly directed ridge angle section is levered away from the edge directed towards the outside of the upper opening, and that the engagement between the edges directed respectively towards the inside and towards the outside is thus weakened on the central part.

In the engaged position, the collapsible skirt section is separated from the remaining skirt section by means of two grooves formed in the outer surface of the skirt and extending downward from a fold area to the lower edge of the skirt, said grooves reducing the wall thickness of the skirt so that the skirt can be broken along the grooves to collapse the collapsible skirt section from its engaged position to its forward facing position the outside.

Such a solution comprising a collapsible skirt section greatly facilitates the opening of the lid at the place where it is the most difficult (ie a corner), by weakening the connection between the lid and the container in this corner, and advantageously combines a opening indicator function, the two grooves frangible being broken irreversibly, after raising the skirt section. In the document EP 0 110 859 , the inwardly directed edge is carried by the collapsible skirt section, located below the flexible hinge between the collapsible skirt section and the second engagement part. However, it is possible to provide the edge directed inwards above the flexible hinge, as disclosed by the document EP2523866 , and so that this edge is not severed when raising the folding skirt section, and in order to preserve the seal between the lid and the container after the first opening.

The document FR2921909 discloses a package having the characteristics mentioned in the preamble of the appended claim 1.

According to the findings of the inventors, such an opening indicator is however not completely reliable: it remains possible to detach the lid from the container, while maintaining the folding skirt section in its engagement position, that is to say say without having to raise it, and thus to cut the two breakable grooves. For example, it is very often possible to detach the cover at the level of a corner, by pressing simultaneously, with one hand, strongly under the skirt section, exerting a force tending to unhook the cover, and with the other hand , by constraining the skirt section radially towards the container, and so as to prevent the grooves from being severed. This results in the detachment of the lid without breaking the breakable grooves. It is also known from the state of the art to double the gripping edges at the corners, with another pair of edges, respectively directed outwards and inwards, mutually engaging and able to hook between them, arranged respectively on the first engagement part of the container and on the second part, and in order to increase the hooking at the corner. According to the findings of the inventors, providing a double pair of mutually hooked edges at the corners still does not prevent fraudulent opening, because it remains possible to play on the elasticity of the plastic in order to detach the cover, and always without breaking the breakable grooves.

Summary

The object of the present invention is to overcome the aforementioned drawbacks by proposing a packaging comprising a lid and a container of the type as described in the document FR2921909 , which includes a collapsible skirt section facilitating the detachment of the lid, reducing, or at the very least limiting substantially the risks of fraudulent openings, namely the detachment of the lid without breaking the breakable grooves to function as an opening indicator.

Another object of the present invention is to provide such packaging, the design of which does not complicate the injection molding equipment necessary for its manufacture, and therefore its cost price.

Another object of the present invention is to provide such a packaging whose load resistance when stacking the packaging is significantly improved compared to the aforementioned state of the art. Other aims and advantages will appear during the description which is given for information only and which is not intended to limit it.

Also, the invention relates to a packaging comprising, on the one hand, a container, plastic, comprising side walls meeting at corners, an upper opening and a bottom, and on the other hand, a lid, detachable plastic configured to cover the upper opening of the container, and in which the container is provided at its upper opening with a first engagement portion bearing an outwardly directed ridge, and extending over the periphery, said lid being provided on its peripheral part of a second downwardly extending engagement portion provided with an inwardly directed ridge which is capable of hooking below the outwardly directed ridge of the container, and in which the second engagement portion of the lid has a skirt extending over the lower part of the second engagement portion, and in which the edge of the container directed outwards, on the one hand, and the ridge of the lid diri on the other hand, having curved angle sections at the corners where said side walls meet, said curved angle sections connecting the side sections of respective edges, wherein at least one of the curved angle sections of the inwardly directed ridge is provided with a collapsible skirt section, hinged to a fold area at the top of the second engagement portion which is operable to fold from an engagement position to a outwardly positioned such that a central portion of said at least one angle section of the inwardly directed ridge is leveraged away from the outwardly directed ridge of the top opening , and that the commitment between the ridges is so weakened at the central portion, and wherein said collapsible skirt section is separated from the remaining skirt section by means of two grooves formed in the outer surface of the skirt and extending downward from a folding area to the lower edge of the skirt, said grooves reducing the wall thickness of the skirt so that the skirt can be broken along the grooves to fold the collapsible skirt section from its position of commitment, to its outward facing position.

• la première portion d'engagement du récipient portant l'arête dirigée vers l'extérieur s'étend et se prolonge en dessous de l'arête, dite première arête, et se termine en dessous de la première arête par une seconde arête, également dirigée vers l'extérieur présentant une section de cornière incurvée,
• la section de jupe repliable porte au moins un ergot, dirigé vers l'intérieur, qui dans la position d'engagement de la section de jupe repliable, est à même de s'accrocher sous la seconde arête dirigée vers l'extérieur de la première portion d'engagement, au moins lorsqu'un effort est appliqué sur le couvercle tendant à le détacher.

According to the invention:

• the first engagement portion of the receptacle carrying the outwardly directed ridge extends and extends below the ridge, called the first ridge, and ends below the first ridge with a second ridge, also directed outward with a curved angle section,
• the collapsible skirt section carries at least one lug, directed inwards, which in the engagement position of the collapsible skirt section, is able to hook under the second outwardly directed edge of the first engagement portion, at least when a force is applied to the cover tending to detach it.

• en une zone locale seulement le long de la section de cornière incurvée de la seconde arête dirigée vers l'extérieur, et
• avec un recouvrement d'accrochage entre les faces mutuellement engageantes dudit au moins un ergot et de la seconde arête, lorsque vu suivant une direction radiale à la section incurvée de la seconde arête, de dimension supérieure au recouvrement d'accrochage entre les faces mutuellement engageantes de l'arête dirigée vers l'intérieur et de la première arête dirigée vers l'extérieur, lorsque vu suivant une direction radiale à la section incurvée de la première arête.

Notably, the attachment of said at least one lug to the second edge is achieved, in the engagement position of the folding skirt section:

• in a local area only along the curved angle section of the second outward facing edge, and
• with a gripping overlap between the mutually engaging faces of said at least one lug and the second ridge, when viewed in a direction radial to the curved section of the second ridge, of greater dimension than the gripping overlap between the mutually engaging faces of the inwardly directed ridge and the first outwardly directed ridge, when viewed in a direction radial to the curved section of the first ridge.

• le recouvrement d'accrochage entre ledit au moins un ergot et la seconde arête est au moins deux fois supérieur au recouvrement d'accrochage entre l'arête dirigée vers l'intérieur et la première arête dirigée vers l'extérieur ;
• le recouvrement d'accrochage entre ledit au moins un ergot et la seconde arête est de valeur supérieure à 2 mm et de préférence inférieure à 4 mm ;
• ledit au moins un ergot s'étend en longueur suivant la seconde arête suivant une dimension inférieure à 1/3, voire même 1/5 de la longueur de la seconde arête sur la section de cornière incurvée ;
• la section de jupe repliable du couvercle présentant un évidement traversant s'étendant suivant la hauteur de la section de jupe repliable, au-dessus et au droit dudit au moins un ergot : en particulier ledit évidement traversant s'étend à partir de sa partie basse depuis ledit au moins un ergot et jusqu'à la zone de pliage entre la section de jupe repliable et la partie supérieure de la deuxième partie d'engagement, et seulement sur la longueur de l'ergot ;
• dans la position d'engagement de la section de jupe repliable, et lorsque qu'aucun effort extérieur n'est appliqué sur le couvercle, l'accrochage entre l'arête dirigée vers l'intérieur et la première arête dirigée vers l'extérieur est franc, alors qu'un jeu sépare la seconde arête dirigée vers l'extérieur et ledit au moins un ergot positionné sous la seconde arrête : autrement dit ledit ergot vient en contact d'accrochage avec la seconde arête uniquement lorsque le couvercle est soumis à un effort ;
• le récipient comporte quatre parois latérales se rencontrant en quatre coins, l'arête dirigée vers l'intérieur du couvercle présentant quatre sections de cornière incurvée avec quatre sections de jupe repliable, chacune portant ledit au moins un ergot de la section de jupe repliable, apte à accrocher avec la seconde arête dirigée vers l'extérieur du récipient ;
• la section de jupe repliable porte ledit au moins ergot, ainsi que l'arête dirigée vers l'intérieur, positionnés tous deux sous la zone de pliage, dans la position d'engagement de la section de jupe repliable ;
• la paroi périphérique du couvercle prolongeant immédiatement la deuxième partie d'engagement comprend, le long les bords du couvercle, sur les sections latérales entre les sections de cornières incurvées où l'arête dirigée vers l'intérieur du couvercle accroche l'arête dirigée vers l'extérieur du récipient, des nervures de contre-appui, saillantes, verticales, positionnées sous le couvercle, orientées vers l'extérieur, formant entre les sections de cornières incurvée une pluralité de contre-appuis sur les faces internes des parois du récipient, répartis sur la périphérie du récipient, renforçant l'accrochage entre les arêtes des sections latérales le long des bords du couvercle entre les sections de cornières incurvée ;
• la densité des nervures de contre-appui le long du bord du couvercle est, sur la partie médiane entre deux sections de cornières incurvées, supérieure à la densité des nervures de contre appui sur les parties extrêmes à proximité des sections de cornières incurvée, de part et d'autre de la partie médiane ;
• la paroi périphérique prolongeant la deuxième partie d'engagement relie la deuxième partie d'engagement à la paroi horizontale du couvercle, en étant inclinée par rapport à la paroi horizontale, par exemple d'un angle α compris entre 45° et 70°, la paroi périphérique délimitant avec les parois internes du récipient une gorge G débouchant sous la sous face du couvercle à l'intérieur de laquelle s'étendent en saillie lesdites nervures de contre-appui;
• chaque nervure de contre-appui est de forme triangulaire, attenante de la paroi périphérique par le plus grand côté du triangle, tandis qu'un deuxième côté du triangle, sensiblement horizontal, est orienté dans le prolongement de la paroi horizontale du couvercle, le troisième côté formant une zone d'appui sur la face interne du récipient ;
• le troisième côté présente une section de longueur supérieure, formant la zone d'appui sur la face interne d'une paroi latérale du récipient, et une section de longueur inférieure, grugée, de sorte à ne pas appuyer sur la paroi latérale, l'angle formé entre le deuxième côté et le troisième côté étant arrondi ;
• la couvercle comportent des nervures de calage, s'étendant en saillie sur la périphérie de couvercle, vers l'intérieur par rapport à la deuxième partie d'engagement et vers le haut par rapport à la paroi horizontale du couvercle, lesdits nervures de calages étant réparties sur la périphérie intérieure de la deuxième partie d'engagement, de sorte à recevoir entre elles en le centrant la partie basse d'un récipient d'une emballage identique superposé sur la paroi horizontale du couvercle, lesdites nervures de calage constituant des butés avec la partie basse des parois latérales du récipient superposé ;
• les nervures de contre-appui sont, au moins en partie, des nervures situées, par rapport à la paroi périphérique dans le prolongement des nervures de calage ; lesdites nervures de contre-appui et lesdits nervures de calage étant coplanaires par paires ;
• chaque nervures de calage s'étend en hauteur depuis la paroi horizontale du couvercle et jusqu'au-dessus de la partie basse de la deuxième partie d'engagement, et vers l'intérieur, depuis la deuxième partie d'engagement jusqu'à la paroi horizontale, en recouvrant partiellement la paroi horizontale, chaque nervure de calage étant attenante au niveau d'une première arête le long de la paroi horizontale du couvercle, au niveau d'une seconde arête le long de la paroi périphérique inclinée, et sur une partie de la hauteur de la deuxième partie d'engagement le long d'une troisième arête ;
• la deuxième partie d'engagement, forme une gorge ouverte vers le bas, recevant la première partie d'engagement, la seconde partie d'engagement comprenant une section en U inversé, y compris une première section de longueur prolongeant la paroi supérieure du couvercle ( y compris le cas échant ladite paroi périphérique), suivie d'une deuxième section de longueur, inclinée par rapport à la première section, par exemple horizontale, suivie d'une troisième section de longueur, inclinée par rapport à la deuxième section et se prolongeant vers le bas en formant ladite jupe , cette troisième section portant l'arête dirigée vers l'intérieur.

According to characteristics of the invention, taken alone or in combination:

• the gripping overlap between said at least one lug and the second edge is at least twice greater than the gripping overlap between the inwardly directed edge and the first outwardly directed edge;
• the hooking overlap between said at least one lug and the second edge is greater than 2 mm and preferably less than 4 mm;
• said at least one lug extends lengthwise along the second edge along a dimension less than 1/3, or even 1/5 of the length of the second edge on the curved angle iron section;
• the folding skirt section of the cover having a through recess extending along the height of the folding skirt section, above and in line with said at least one lug: in particular said crossing recess extends from its lower part from said at least one lug and up to the folding zone between the folding skirt section and the upper part of the second engagement part, and only over the length of the lug;
• in the engagement position of the folding skirt section, and when no external force is applied to the cover, the engagement between the inwardly directed edge and the first outwardly directed edge is free, while a clearance separates the second edge facing outwards and said at least one lug positioned under the second edge: in other words, said lug comes into latching contact with the second edge only when the lid is subjected to a effort ;
• the container has four side walls meeting at four corners, the inwardly facing edge of the lid having four curved angle sections with four collapsible skirt sections, each carrying said at least one lug of the collapsible skirt section, adapted to hang with the second edge directed towards the outside of the container;
• the folding skirt section carries said at least lug, as well as the inwardly directed edge, both positioned under the folding zone, in the position of engagement of the folding skirt section;
• the peripheral wall of the cover immediately extending the second engagement portion comprises, along the edges of the cover, on the side sections between the curved angle sections where the inwardly directed edge of the cover catches the inwardly directed edge exterior of the container, protruding, vertical counter-support ribs, positioned under the lid, facing outwards, forming between the sections of curved angle irons a plurality of counter-supports on the internal faces of the walls of the container, distributed on the periphery of the container, reinforcing the grip between the edges of the sections laterals along the edges of the cover between the sections of curved angles;
• the density of the counter-support ribs along the edge of the cover is, on the middle part between two sections of curved angle irons, greater than the density of the counter-support ribs on the end parts near the curved angle iron sections, on either side sides of the middle part;
• the peripheral wall extending the second engagement part connects the second engagement part to the horizontal wall of the lid, being inclined with respect to the horizontal wall, for example by an angle α comprised between 45° and 70°, the peripheral wall delimiting with the inner walls of the container a groove G opening out under the underside of the cover inside which the said counter-support ribs extend;
• each counter-support rib is triangular in shape, adjoining the peripheral wall by the longest side of the triangle, while a second side of the triangle, substantially horizontal, is oriented in the extension of the horizontal wall of the lid, the third side forming a support zone on the internal face of the container;
• the third side has a section of greater length, forming the bearing zone on the internal face of a side wall of the container, and a section of lower length, notched, so as not to press on the side wall, the angle formed between the second side and the third side being rounded;
• the lid have wedging ribs, projecting from the periphery of the lid, inwardly with respect to the second engagement part and upwards with respect to the horizontal wall of the lid, said wedging ribs being distributed over the inner periphery of the second engagement part, so as to receive between them by centering it the lower part of a container of identical packaging superimposed on the horizontal wall of the lid, said wedging ribs constituting abutments with the lower part of the side walls of the superimposed container;
• the counter-support ribs are, at least in part, ribs located, relative to the peripheral wall, in the extension of the wedging ribs; said counter-support ribs and said wedging ribs being coplanar in pairs;
• each wedging rib extends in height from the horizontal wall of the cover and above the lower part of the second engagement part, and inwards, from the second engagement part to the horizontal wall, partially covering the horizontal wall, each wedging rib adjoining at a first ridge along the horizontal wall of the cover, at a second ridge along the inclined peripheral wall, and over part of the height of the second engagement portion along 'a third ridge;
• the second engagement part, forms a groove open downwards, receiving the first engagement part, the second engagement part comprising an inverted U-shaped section, including a first length section extending the upper wall of the lid ( including, where applicable, said peripheral wall), followed by a second length section, inclined with respect to the first section, for example horizontal, followed by a third length section, inclined with respect to the second section and extending downwards forming said skirt, this third section bearing the edge directed inwards.

The invention also relates to a method of manufacturing a packaging in accordance with the invention in which said lid and said container are obtained by injection molding.

Brief description of the drawings

• Fig. 1
  [Fig. 1] est une vue en perspective d'un emballage conforme à l'invention comprenant un récipient dont l'ouverture supérieure est obturée par un couvercle dudit emballage.
• Fig. 1a
  [Fig. 1a] est une vue de détail de la figure 1, illustrant la section de jupe repliable, au niveau d'un coin, dans sa position d'engagement, séparée de la partie restante de la jupe par deux rainures, sécables, avec la présence d'un évidement traversant la section de jupe, au droit d'un ergot, l'évidement s'étendant depuis l'ergot jusqu'à la hauteur de la zone de pliage autorisant le relevage de la section de jupe de sa position d'engagement vers sa position dirigée vers l'extérieur.
• Fig. 2
  [Fig. 2] est une vue de deux couvercles empilés l'un sur l'autre, et selon un plan de coupe passant par les côtés latéraux des couvercles.
• Fig. 3
  [Fig. 3] est une vue de deux couvercles empilés l'un sur l'autre et selon un plan de coupe passant par une direction radiale à la section de cornière de deux des coins des couvercles.
• Fig. 4
  [Fig. 4] est une vue de coupe, illustrant l'emboîtement de la première partie du récipient sur la deuxième partie du couvercle, et selon un plan de coupe passant par un côté latéral du couvercle.
• Fig. 5
  [Fig. 5] est une vue de coupe, illustrant l'emboîtement de la première partie du récipient sur la deuxième partie du couvercle, et selon un plan de coupe passant par la section de jupe repliable, sans passer par l'ergot.
• Fig. 6
  [Fig. 6] est une vue de coupe, illustrant l'emboîtement de la première partie du récipient sur la deuxième partie du couvercle, et selon un plan de coupe passant par la section de jupe repliable, passant par l'ergot.
• FIG 7
  [Fig. 7] est une vue en perspective de deux emballages selon l'invention gerbés l'un sur l'autre, conformes à un seconde mode de réalisation, présentant non seulement des ergots renforçant l'accrochage du couvercle sur les coins, mais encore des nervures de contre-appui, saillantes vers l'extérieur, en appui sur les faces internes des parois latérales du récipient renforçant avantageusement l'accrochage entre la nervure du couvercle dirigée vers l'intérieur et la nervure du récipient, dirigée vers l'extérieur, le long des bords entre les coins.
• FIG 8
  [Fig. 8] est vue en perspective du couvercle de l'emballage de la figure 7, ce couvercle étant notable en ce qu'il comprend des nervures de contre-appui, sous le couvercle, répartis sur la périphérie du couvercle le long des bords entre les coins du couvercle, destiné à favoriser l'accrochage du couvercle sur cette zone, et des nervures de calage, saillantes sur la partie supérieure du couvercle, destinées à favoriser le calage et le centrage d'un emballage identique gerbé sur le couvercle
• FIG 9
  [Fig. 9] est une vue de coupe du couvercle tel qu'illustré à la figure 7 selon un plan parallèle à la paroi horizontale du couvercle, illustrant plus particulièrement les positionnements relatifs des nervures de calage par rapport aux nervures de contre-appui, certaines des nervures de calage étant dans le prolongement des nervures de contre-appui.
• Fig. 10
  [Fig. 10] est une vue de coupe, selon un plan verticale passant par la partie médiane entre deux coins de l'emballage, illustrant l'accrochage entre la nervure dirigée vers l'intérieur (du couvercle) et la nervure (du récipient) dirigée vers l'extérieur, et son renforcement grâce à la nervure de contre-appui venant en contact contre la face interne de la paroi latérale du couvercle, cette nervure de contre-appui étant saillante d'une paroi périphérique inclinée par rapport à la paroi horizontale du couvercle, la nervure de contre-appui étant de forme triangulaire, attenante par son côté le plus grand, présentant un deuxième coté en prolongement du la paroi horizontale, et un troisième côté formant un arête d'appui, l'angle formé entre le deuxième côté et le troisième côté étant arrondi ;
• Fig. 11
  [Fig.11] est une vue de coupe, vue de dessous, illustrant l'action des nervures de contre-appui pour renforcer l'arrochage des nervures mutuellement accrochées entre le couvercle et le récipient, et l'action des nervures de calage pour le centrage du réicpient gerbé sur le couvercle

Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the appended drawings, in which:

• Fig. 1
  [ Fig. 1 ] is a perspective view of a packaging according to the invention comprising a container whose upper opening is closed by a lid of said packaging.
• Fig. 1a
  [ Fig. 1a ] is a detail view of the figure 1 , illustrating the collapsible skirt section, at one corner, in its engagement position, separated from the remaining part of the skirt by two separable grooves, with the presence of a recess passing through the skirt section, at the right of a lug, the recess extending from the lug to the height of the folding zone allowing the lifting of the skirt section from its engagement position to its outwardly directed position.
• Fig. 2
  [ Fig. 2 ] is a view of two lids stacked on top of each other, and according to a section plane passing through the lateral sides of the lids.
• Fig. 3
  [ Fig. 3 ] is a view of two lids stacked on top of each other and along a section plane passing through a direction radial to the angle section of two of the corners of the lids.
• Fig. 4
  [ Fig. 4 ] is a sectional view, illustrating the fitting of the first part of the container on the second part of the lid, and according to a sectional plane passing through a lateral side of the lid.
• Fig. 5
  [ Fig. 5 ] is a sectional view, illustrating the fitting of the first part of the container on the second part of the lid, and according to a sectional plane passing through the folding skirt section, without passing through the lug.
• Fig. 6
  [ Fig. 6 ] is a sectional view, illustrating the fitting of the first part of the container on the second part of the lid, and according to a sectional plane passing through the folding skirt section, passing through the lug.
• FIG 7
  [ Fig. 7 ] is a perspective view of two packages according to the invention stacked one on top of the other, in accordance with a second embodiment, having not only lugs reinforcing the attachment of the lid to the corners, but also ribs of counter-support, projecting outwards, resting on the internal faces of the side walls of the container, advantageously reinforcing the hooking between the inward facing rib of the lid and the outward facing rib of the container along the edges between the corners.
• FIG 8
  [ Fig. 8 ] is a perspective view of the lid of the packaging of the figure 7 , this cover being notable in that it comprises counter-support ribs, under the cover, distributed over the periphery of the cover along the edges between the corners of the cover, intended to promote the attachment of the cover to this area, and wedging ribs, projecting from the upper part of the lid, intended to promote the wedging and centering of an identical package stacked on the lid
• FIG 9
  [ Fig. 9 ] is a sectional view of the cover as shown in figure 7 along a plane parallel to the horizontal wall of the cover, more particularly illustrating the relative positioning of the wedging ribs with respect to the counter-support ribs, some of the wedging ribs being in the extension of the counter-support ribs.
• Fig. 10
  [ Fig. 10 ] is a sectional view, along a vertical plane passing through the middle part between two corners of the packaging, illustrating the attachment between the rib directed towards the inside (of the lid) and the rib (of the container) directed towards the outside, and its reinforcement thanks to the counter-supporting rib coming into contact against the internal face of the side wall of the cover, this counter-supporting rib projecting from a peripheral wall inclined with respect to the horizontal wall of the cover , the counter-support rib being of triangular shape, adjoining by its largest side, having a second side in extension of the horizontal wall, and a third side forming a support edge, the angle formed between the second side and the third side being rounded;
• Fig. 11
  [ Fig.11 ] is a cross-sectional view, seen from below, illustrating the action of the counter-support ribs to reinforce the wetting of the mutually hooked ribs between the lid and the container, and the action of the wedging ribs for centering the stacked container on the lid

Description of embodiments

The drawings and the description below contain, for the most part, certain elements. They may therefore not only serve to better understand this disclosure, but also contribute to its definition, where applicable.

The invention relates to a packaging 1 comprising, on the one hand, a plastic container 2, comprising side walls 20, 21, 22, 23 meeting at corners 24, an upper opening 25 and a bottom 26, and on the other hand, a lid 4, detachable plastic configured to cover the upper opening of the container.

The side walls 20, 21, 22, 23 can be substantially divergent, forming between them a truncated pyramid, configured so that the container is stackable inside an identical container.

The container 2 is provided at its upper opening 25 with a first engagement portion 27 bearing a ridge 28 directed outwards, and extending over the periphery, said cover 4 being provided on its peripheral part with a second engagement portion 40 extending folded downwards provided with a ridge 41, directed towards the interior which is able to hook below the ridge 28 directed towards the outside of the container.

Also, and in the sectional view of the figure 4 we note that the first engagement part 27 penetrates a groove of the second engagement part 40, open downwards. The first engagement part 27 comprises an inverted U-shaped section, including a first length section extending the inner wall upwards, followed by a second length section, inclined with respect to the first section, for example horizontal, followed by a third section in length, inclined with respect to the second section and extending downwards, this third section bearing the ridge 28 directed towards the outside, and partly terminating in a second ridge 30.

Also, and in the sectional view of the figure 4 , it is noted that the second engagement part 40, forms a groove open downwards, receiving the first engagement part 27. The second engagement part 40 comprises an inverted U-shaped section, including a first section of length extending the upper wall of the cover, followed by a second length section, inclined with respect to the first section, for example horizontal, followed by a third length section, inclined with respect to the second section and extending downwards by forming a skirt 42, this third section bearing the edge 41 directed inwards.

The second engagement portion of the lid thus has the skirt 42 which extends over the lower part of the second engagement portion 40, the edge 28 of the container facing outwards, on the one hand, and the ridge 41 of cover 4 facing inwards, on the other hand, having curved angle sections 29, 43 at the corners where said side walls meet, said curved angle sections connecting the side sections of the respective edges.

At least one of the curved angle sections 43 of the inwardly facing ridge 41 is provided with a collapsible skirt section 44, hinged to a fold area 46 at the top of the second engagement portion 40 which is able to fold from an engagement position P1 to an outwardly directed position so that a central part of said at least one angle section of the inwardly directed ridge 41 is pushed aside by leverage of the edge 28 directed towards the outside of the upper opening, and the engagement between the edges 28, 41 is thus weakened on the central part.

Such a foldable skirt section facilitates detachment of the cover by the user, and without requiring the use of a tool such as a screwdriver: the weakening is obtained simply by spreading the foldable skirt section 44 outwards. which pivots relative to the rest of the cover around the folding zone 46.

According to the invention, said folding skirt section 44 is, in its engagement position, separated from the remaining section of the skirt by means of two grooves 45 formed in the external surface of the skirt and extending downwards. a fold zone up to the lower edge of the skirt: said grooves 45 reduce the wall thickness of the skirt so that the skirt can be ruptured along the grooves to collapse the collapsible skirt section from its engagement position P1 to its outward facing position. These grooves 45, once irreversibly broken, constitute opening indicators.

According to the invention and in a notable way, the first engagement portion 27 of the container carrying the edge 28 directed towards the outside extends and extends below the edge, called the first edge, and ends below of the first edge by a second edge 41 directed outwards, having a curved angle section.

We thus notice, at the figure 4 that the third section of length carrying the edge 28 extends below this edge 28 directed towards the outside and ends with a second edge 30 directed towards the outside.

We notice that on the figure 6 , the folding skirt section 42 carries at least one lug 47, directed inwards, which in the engagement position P1 of the folding skirt section, is able to hook under the second edge 30 directed towards the outside the first engagement portion, at least when a force is applied to the cover tending to detach it.

Notably, the attachment of said at least one lug 47 on the second edge 30 is carried out, in the engagement position P1 of the folding skirt section in a local area only, along the curved section of the second edge 30 directed outwards: the lug 47 extends along the length of the second edge 30 only over part of the second edge 30: for example the lug extends along the second edge along a dimension less than 1 /3, or even 1/5 of the length of the second edge 30 on the curved angle section.

Notably, the gripping overlap Rac2 between the mutually engaging faces of said at least one lug 47 and of the second edge 30, in a direction radial to the curved section of the second edge 30, is of greater dimension than the overlap of coupling Rac1 between the mutually engaging faces of the inwardly directed edge 41 and the first edge 28 directed outwards, in a direction radial to the curved section of the first edge 28.

The Rac2 and Rac1 hooking covers are visible for information only on the figure 6 : it can be seen that the Rac2 attachment cover between the lug 47 and the second edge 30 is much greater than the Rac1 attachment cover between the inwardly directed edge 41 and the outwardly directed edge 28 .

Also, and in the event of a fraudulent opening attempt, and even supposing that the edge 41 directed inwards is unhooked from the first edge 28, due to the weaker attachment covering Rac1, said at least one lug 47 always comes to hook the second edge 30, due to a greater Rac2 hooking overlap: by way of example, the Rac2 hooking overlap between said at least one lug 47 and the second edge 30 is at least two times greater than the gripping overlap Rac1 between the edge 41 directed inwards and the first edge 28 directed outwards.

Thus, it only becomes possible to unhook said at least one lug 47 from the second edge 30 by the folding of the folding skirt section 44 and advantageously according to a displacement amplitude obliging the rupture of the grooves 45. This substantially increases the reliability of this opening witness.

As such, it can be seen that the dimension of the lug 47 directed inwards is much greater than the dimension of the edge 41 directed inwards. As such, the folding skirt section 42 of the cover 4 may have a through recess 48 extending along the height of the folding skirt section 44, above and to the right of said at least one lug 47. The function of this recess is to facilitate the demolding of the cover after injection molding during its manufacture: failing this the large dimension of the lug inwards, necessary to obtain the Rac2 hooking covering, makes the demolding tedious, even impossible without any particular arrangement of the mould.

Note that this through recess 48 implicitly weakens the folding skirt section 44: also this recess extends only over the zone necessary to facilitate demolding, that is to say that this recess is located in line with said at least lug 47, which itself spans a low section of length along the angle section 43, and to limit the size of this recess. In the end, a compromise is obtained between the ease of implementation during the manufacturing process by injection molding, and the resistance of the attachment between the folding skirt section and the container in this corner.

As illustrated at picture 1a , said through recess 48, extends, for example from its lower part from said at least one lug 47 and up to the folding zone 46 between the folding skirt section 44 and the upper part of the second part of engagement 40, and only on the length of the lug 47.

In the engagement position P1 of the folding skirt section, and when no external force is applied to the lid as illustrated in figure 6 , the attachment between the inwardly directed edge 41 and the outwardly directed first edge 28 is straightforward, whereas a clearance J can separate the outwardly directed second edge 30 and said at least one lug 47 positioned under the second edge 30: in such a case said lug 47 comes into latching contact with the second edge 30 only when the cover 4 is subjected to a force, for example a force tending to detach the cover, or even a heavy load on the lid, such as for example when the packages according to the invention are stacked (stacked) on top of each other.

As such, the invention further improves the resistance to stacking of the packaging, and more particularly the holding of the lid of the lowest packaging in the stack: under the effect of the weight of the column, in the packaging of the state of the art, it may happen that the lid unhooks and finds itself literally pushed through the opening of the container. The invention allows, by the attachment of said at least lug, a better resistance to depression. In such a case, at least one lug 47 and at least one collapsible skirt section can be provided on each corner of the package.

According to the illustrated embodiment, the folding skirt section 44 carries said at least one lug 47, as well as the edge 41 directed inwards, both positioned under the folding zone 46, in the engagement position P1 of the folding skirt section 44: the edge 41 directed towards the inside is therefore severed when the folding skirt section 44 is raised, from its engagement position P1. Alternatively and as taught by the document EP2523866, the edge 41 directed inward may be located above the fold area 46, so that raising the foldable skirt section does not severe the inward facing ridge 41, preserving the sealing properties of the lid with the first opening.

According to an illustrated embodiment, the container has four side walls meeting at four corners, the edge 41 directed towards the inside of the lid having four curved angle sections 43 with four collapsible skirt sections 44, each carrying at least one lug 47 of the folding skirt section, capable of hooking with the second edge 30 directed towards the outside of the container. At least four lugs 47 provide reliable attachment of the lid to the four corners of the container, which further increases the attachment connection between the lid and the container.

Advantages and disadvantages of the first embodiment

The presence of lugs 47, in particular at the four sections of angle irons 43 curved, first of all considerably increases the reliability of the opening indicators, forcing the user to break the grooves 45 to disengage the lugs 27 from the second edge 30

The invention further improves the resistance to stacking of the packaging, and more particularly the strength of the lid of the lowest packaging in the stack: under the effect of the weight of the column. On the contrary, and in the packaging of the state of the art, it may happen that the lid unhooks and finds itself literally pushed through the opening of the container. The invention allows, by the attachment of said at least lug at the corners, a better resistance to depression, the lid remaining attached to the container at least at the level of the four corners having said lugs.

According to the illustrated embodiment of figures 1 to 6 , during stacking, and more particularly in the event of a heavy load, the container deforms the lid and creates strong internal tensions which propagate as far as the second engagement part 40. During a heavy load, and according to the observations of the inventors , it can be seen that the cover remains hooked by its corners, thanks to the action of the lugs 27 which come into abutment against the second edge 30, under the effect of the deformations during the load, eliminating the game J, advantageously avoiding the depression of the cover in the container. On the other hand, in the event of a heavy load, it may happen that the internal tensions are of such intensity that the edges 28, 41 between the lid and the container are unhooked along the edges of the lid between the corners on the side sections of the edges 28, 41, and in particular at the level of the middle parts on the periphery of the lid, away from the corners. This then results in a clear loss of seal between the lid and the container. The improvement described below makes it possible to solve this problem.

Improvement obtained by the second embodiment

The second illustrated embodiment of the figures 7 to 11 is advantageous in that it provides reinforcement of the grip between the first engagement part of the container and the second engagement part of the lid, not only at the corners, but also along the edges between the corners on the side sections of the edges 28.41/.

Notably, (and like the first embodiment) this second embodiment comprises first of all, said at least one lug 47 configured to hook, the second edge 30 of the container, and according to the cover attachment described above, important, which ensures, not only having to cut the grooves 45 to release said at least lug 47 from the second edge 30, but also a maintenance of the lid on the container, during stacking, by resisting the deformation and stresses under load, thanks to a robust attachment at the corners of the cover carrying said at least lug, following the angle sections 43 curved.

First of all, we notice the figure 8 that the attachment may possibly be reinforced, still at the corners, with the presence of two lugs 47 on each folding skirt section 44; at the curved angle sections. Doubling the lugs 47 by corners can be a general measure according to the invention, and not limited to this particular embodiment.

Also noticeably (and specific to this second embodiment), it is further noted that the peripheral wall 49 of the cover extending immediately the second engagement portion 40 comprises along the edges of the lid on the side sections between the curved angle sections 43 where the ridge 41 facing the interior of the lid hooks the ridge 28 facing the exterior of the container , counter-support ribs 50, protruding, vertical, positioned under the cover, facing outwards.

These counter-support ribs 50 are significant in responding to the problem identified above for the first embodiment in that they advantageously form a plurality of counter-supports Ap on the internal faces of the side walls 20, 21, 22, 23 of the container, distributed over the periphery of the container on the side sections of the edges 28, 41 between the angle sections 43 curved. These against Ap support advantageously reinforce the attachment between the edges 28, 41 along the edges of the cover on the side sections of the edges 28,41 between the angle sections 43 curved.

When stacking a package resting on the lid of an identical package, one obtains advantageously thanks to the combined presence of the lugs 47, on the folding skirt sections 44, at the level of the corners, on the one hand, and of the ribs counter-support 50, along the edges between the corners, on the other hand, good maintenance of the attachment of the lid to the container, without unhooking the ribs 28, 41 over the entire periphery of the lid, that is i.e. not only at the corners, but more so along the edges between the corners

As visible to figure 10 and 11 , the second engagement part 40, forms a groove G open downwards, receiving the first engagement part 27. The second engagement part 40 comprises an inverted U-shaped section, including a first length section, extending the upper wall of the cover (including immediately the peripheral wall 49 extended by a central horizontal wall of the cover), followed by a second length section, inclined with respect to the first section, for example horizontal, followed by a third section in length, inclined with respect to the second section and extending downwards forming a skirt 42, this third section bearing the edge 41 directed inwards.

The peripheral wall 49 extends the second engagement part 40 by connecting the second engagement part to the horizontal wall of the lid. As visible to figure 10 and 11 , this peripheral wall 49 can be inclined with respect to the horizontal, central wall of the cover, for example by an angle α for example between 30° and 70° in particular between 45° and 70°. This wall 49 is descending, from the second engagement part 40 towards the horizontal wall. This peripheral wall 49 delimits with the side walls 20; 21; 22; 23, when the lid is attached to the container (by hooking the ribs 28, 41) a groove G, opening under the underside of the lid 4 and which runs on the inner periphery of the container. It is further noted that the counter-support ribs 50 extend inside this groove G, coming into counter-support Ap on the inner face of the side wall 20; 21; 22; 23. These supports actually prohibit the approximation of the peripheral wall 49 under the load during stacking. This advantageously avoids such a deformation which tends to open the U-shaped section of the second engagement part 40, favoring the unhooking of the edges 28, 41 along the edges. Advantageously, better retention of the attachment between the edges 28 and 41 along the edges of the packaging between the corners is obtained.

The density of the ribs 50 against support along the edge of the cover 4 can be, on the middle part PM of the lateral section between two sections of curved angles 43, greater than the linear density of the ribs 50 against support on the parts extremes PE of the lateral section close to the sections of curved angles 43, on either side of the median part PM

To the figure 8 , it is noted that the median part PM comprises five counter-support ribs 50 along the length of the edge between two corners, whereas the two end parts PE have a lower linear density, with only two counter-support ribs.

As visible from figure 10 and 11 ; each counter-support rib 50 can be triangular in shape, adjoining the peripheral wall 49 by the longest side 51 of the triangle called the first side, while a second side 52 of the triangle, substantially horizontal, is oriented in the extension of the horizontal wall of the cover and in particular of its underside, the third side 53 forming a support zone on the internal face of the container. We also note that the third side 52 has a section of greater length Sls, forming the counter support Ap on the internal face of a side wall of the container, and a section of lower length Sli, notched, so as not to press on the side wall, the angle formed between the second side 52 and the third side 53 advantageously being round. This avoids the presence of sharp corners liable to alter the content, or even to pierce a flexible bag used to condition materials inside the container.

As seen at figure 8 , the lid 4 may also include wedging ribs 54, projecting from the periphery of the lid, inwards with respect to the second engagement part 40 and upwards with respect to the horizontal wall of the lid . The wedging ribs 54 are distributed over the inner periphery of the second engagement part 40, so as to receive between them by centering it the lower part of a container of identical packaging superposed on the horizontal wall of the cover. Said wedging ribs constitute abutments with the lower part of the side walls of the superposed container, ensuring its centering on the lid.

As seen at figure 9 the counter-support ribs 50 are, at least in part, ribs located, with respect to the peripheral wall 49, in the extension of the wedging ribs 54; said counter support ribs 50 and said wedging ribs 54 being coplanar, in pairs.

• la parties médiane PM comprend trois des nervures de calage 54 prolongeant respectivement trois nervures de contre-appui 50, alors que deux autres nervures de contre appui 50, respectivement positionnées intermédiaires entre les nervures précités, sont saillantes de la paroi périphérique 49, seules, à savoir sans prolonger des nervures de calage ;
• aux deux parties extrêmes PE, de part et d'autre de la partie médiane PM, deux nervures 50 de contre appui prolongent respectivement deux nervures de calage 54.

Thus we notice at the figure 9 , for each edge between two corners of the lid:

• the middle parts PM comprises three of the wedging ribs 54 respectively extending three counter-support ribs 50, while two other counter-support ribs 50, respectively positioned intermediate between the aforementioned ribs, protrude from the peripheral wall 49, alone, at namely without extending rigging ribs;
• at the two end parts PE, on either side of the middle part PM, two counter-support ribs 50 respectively extend two wedging ribs 54.

Each wedging ribs 54 extends in height from the horizontal wall of the cover and up above the lower part of the second engagement part 40, and inwards, from the second engagement part 40 up to the horizontal wall, partially covering the horizontal wall of the lid. As seen at figure 10 each wedging rib 54 adjoins the rest of the lid at a first edge 55 along the horizontal wall, at a second edge 56 along the inclined peripheral wall 49, and over part of the height of the second engagement part along a third edge 57. In combination with the counter-support ribs 50, these wedging ribs 54 can participate in limiting the transmission of forces under the load to the second engagement part.

Naturally, other embodiments of the invention could have been envisaged without thereby departing from the scope of the invention as defined by the claims below.

List of reference signs

• 1. Packaging,
• 2. Container,
• 20, 21, 22, 23. side walls,
• 24. Corners,
• 25. Top opening,
• 26. Bottom,
• 27. Commitment Portion,
• 28. First ridge pointing outward,
• 29. Curved angle section (edge 28),
• 4. Lid,
• 40. Second portion of commitment,
• 41. Second ridge directed inwards,
• 42. Skirt,
• 43. Curved angle section (edge 41),
• 44. Collapsible skirt section,
• 45. Breakable grooves,
• 46. Bend area (e.g. soft hinge),
• 47. Ergot
• 48. Cross recess
• 49 Peripheral wall in extension of the second engagement part 40
• 50 counter-support ribs,
• 51. Large side of the triangle forming the counter-support rib,
• 52. Second side of the triangle in extension of the horizontal wall of the lid,
• 53. Third side of the triangle constituting a zone of counter support,
• 54. Wedging ribs
• 55 First Ridge (Rib 54)
• 56 Second Ridges (Rib 54
• 57 Third Ridge (Rib 54)
• G. Throat
• PE. End parts (side sections of edges 28, 41)
• PM. Middle part (lateral sections of edges 28, 41)
• Rac1. Rac2 Snap overlays
• J. Play separating said lug and the second edge when no force is applied to the cover.

Claims (19)

1. A packaging (1) comprising, on the one hand, a container (2), of plastic, comprising lateral walls (20, 21, 22, 23) meeting at corners (24), an upper opening (25) and a bottom (26), and on the other hand, a detachable lid (4) of plastic configured to cover the upper opening of the container, and wherein the container (2) is provided at the upper opening (25) thereof with a first engagement portion (27) bearing an outwardly directed ridge (28), and extending over the periphery, said lid (4) being provided over the peripheral part thereof with a second engagement portion (40) extending folded downward provided with an inwardly directed ridge (41) which is able to latch below the outwardly directed ridge (28) of the container, and wherein the second engagement portion of the lid has a skirt (42) extending over the lower part of the second engagement portion, and wherein the outwardly directed ridge (28) of the container, on the one hand, and the inwardly directed ridge (41) of the lid (4), on the other hand, have curved corner sections (29, 43) in the corners where said lateral walls meet, said curved corner sections connecting the lateral sections of the respective ridges, where at least one of the curved corner sections (43) of the inwardly directed ridge (41) is provided with a foldable skirt section (44), articulated in a folding area (46) at the upper part of the second engagement portion (40) which is able to be folded from an engagement position (P1) to an outwardly directed position in such a way that a central part of said at least one corner section of the inwardly directed ridge (41) is separated by a levering effect of the outwardly directed ridge (28) of the upper opening, and that the engagement between the ridges (28, 41) is thus weakened over the central part, and wherein said foldable skirt section (44) is separated from the remaining section of the skirt by means of two grooves (45) formed in the outer surface of the skirt and extending downward from a folding area to a lower edge of the skirt, said grooves (45) reducing the thickness of the wall of the skirt in such a way that the skirt can be broken along the grooves in order to fold the foldable skirt section from the engagement position (P1) thereof toward the outwardly directed position thereof

   characterized in that the first engagement portion (27) of the container bearing the outwardly directed ridge (28) extends and is elongated below the ridge, referred to as first ridge, and ends below the first ridge by a second ridge (30), also outwardly directed having a curved corner section, and wherein the foldable skirt (42) section bears at least one lug (47), inwardly directed, which in the position of engagement (P1) of the foldable skirt section (44) is able to latch below the second outwardly directed ridge (30) of the first engagement portion, at least when a force is applied to the lid tending to detach it,

   and wherein the latching of the said at least one lug (47) on the second ridge (30) is achieved, in the engagement position (P1) of the foldable skirt section (44) in a local area only along the curved corner section of the second outwardly directed ridge (30), and with a latching covering (Rac2) between the mutually engaging faces of said at least one lug (47) and of the second ridge (30), when viewed in a direction radial to the curved section of the second ridge (30), of larger dimension than the latching covering (Rac1) between the mutually engaging faces of the inwardly directed ridge (41) and of the first outwardly directed ridge (28), when viewed along a direction radial to the curved section of the first ridge (28).
2. The packaging according to claim 1, wherein said latching covering (Rac2) between said at least one lug (47) and the second ridge (30) is at least twice as large as the latching covering (Rac1) between the inwardly directed ridge (41) and the first outwardly directed ridge (28).
3. The packaging according to claim 1 or 2, wherein said latching covering (Rac2) between said at least one lug (47) and the second ridge (30) has a value of more than 2 mm and less than 4 mm.
4. The packaging according to one of claims 1 to 3, wherein said at least one lug (47) extends along the second ridge (30) in a length less than 1/3, even 1/5 of the length of the second ridge (30) over the curved corner section.
5. The packaging according to one of claims 1 to 4, wherein the foldable skirt section (42) of the lid (4) having a through recess (48) extending along the height of the foldable skirt section (44), above and perpendicular to said at least one lug (47).
6. The packaging according to claim 5, wherein said through recess (48) extends from the lower part thereof from said at least one lug (47) and up to the folding area (46) between the foldable skirt section (44) and the upper part of the second engagement portion (40), and only over the length of the lug (47).
7. The packaging according to one of claims 1 to 6, wherein in the engagement position (P1) of the foldable skirt section, and when no exterior force is applied to the lid, the latch between the inwardly directed ridge (41) and the first outwardly directed ridge (28) is free, while a clearance (J) separates the second outwardly directed ridge (30) and the said at least one lug (47) positioned below the second ridge, said lug (47) coming into latching contact with the second ridge (30) only when the lid (4) is subjected to a force.
8. The packaging according to one of claims 1 to 7, the container whereof comprises four lateral walls meeting at four corners, the inwardly directed ridge (41) of the lid having four curved corner sections (43) with four foldable skirt sections (44), each bearing said at least one lug (47) of the foldable skirt section, capable of latching with the second outwardly directed ridge (30) of the container.
9. The packaging according to one of claims 1 to 8, wherein the foldable skirt section (44) bears said at least one lug (47), as well as the inwardly directed ridge (41), both positioned under the folding area (46), in the engagement position (P1) of the foldable skirt section (44).
10. The packaging according to one of claims 1 to 9, wherein the peripheral wall (49) of the lid immediately extending the second engagement portion (40) comprises, along the edges of the lid, on the lateral sections between the curved corner sections (43) where the inwardly directed ridge (41) of the lid latches the outwardly directed ridge (28) of the container, counter-support ribs (50), projecting, vertical, positioned under the lid, oriented outwardly, forming between the curved corner sections (43) a plurality of counter-supports (Ap) on the inner faces of the lateral walls (20, 21, 22, 23) of the container, distributed over the periphery of the container, reinforcing the latching between the ridges (18, 41) latched along the edges of the lid between the curved corner sections (43).
11. The packaging according to claim 10, wherein the density of the counter-support ribs (50) along the edge of the lid (4) is, over the median part (PM) between two curved corner sections (43), greater than the density of the counter-support ribs (50) over the end parts (PE) in proximity to the curved corner sections (43), on either side of the median part
12. The packaging according to claim 10 or 11, the peripheral wall (49) extending the second engagement portion (40) connects the second engagement portion to the horizontal wall of the lid, while being inclined relative to the horizontal wall, for example by an angle α of between 45° and 70°, the peripheral wall defining with the inner walls of the container a groove G opening below the under face of the lid inside which said counter-support ribs (50) extend in protrusion.
13. The packaging according to claim 12, wherein each counter-support rib (50) is triangular in shape in shape, adjoining the peripheral wall (49) by the largest side (51) of the triangle, while a second side (52) of the triangle, substantially horizontal, is oriented in the extension of the horizontal wall of the lid, the third side (53) forming a support area on the inner face of the container.
14. The packaging according to claim 13, wherein the third side (52) has a longer section (Sls), forming the support area on the inner face of a lateral wall of the container, and a shorter section (Sli), reduced so as not to press on the lateral wall, the angle formed between the second side (52) and the third side (53) being rounded.
15. The packaging according to one of claims 1 to 14, comprising wedging ribs (54), extending in projection over the periphery of the lid, toward the interior relative to the second engagement portion (40) and upward relative to the horizontal wall of the lid, said wedging ribs (54) being distributed over the inner periphery of the second engagement portion (40), in such a way as to receive among them the lower part of a container, while centering it, of an identical packaging stacked on the horizontal wall of the lid, said wedging ribs constituting abutments with the lower part of the lateral walls of the stacked container.
16. The packaging according to one of claims 10 to 14, taken in combination with claim 15, wherein the counter-support ribs (50) are, at least in part, ribs situated, relative to the peripheral wall (49), in the extension of the wedging ribs (54); said counter-support ribs (50) and said wedging ribs being coplanar by pairs
17. The packaging according to claim 12 and 15 or 16, wherein each wedging rib extends upward from the horizontal wall of the lid and above the lower part of the second engagement portion (40), and inwardly, from the second engagement portion up to the horizontal wall, partially covering the horizontal wall, and wherein each wedging rib (54) is adjacent to the rest of the lid at the level of a first ridge (55) along the horizontal wall of the lid, at a second ridge (56) along the peripheral wall (49), and over a portion of the height of the second engagement portion (40), along a third ridge (57).
18. The packaging according to one of claims 1 to 17 the second engagement portion (40) forms a groove open downward, receiving the first engagement portion (27), the second engagement portion (40) comprising an inverted U-shaped section, including a first longitudinal section extending the upper wall of the lid, including, if applicable, said peripheral wall (49), followed by a second longitudinal section, inclined relative to the first section, for example horizontal, followed by a third longitudinal section, inclined relative to the second section and extending downward, forming said skirt (42), said third section bearing the inwardly directed ridge (41).
19. A method for manufacturing a packaging according to one of claims 1 to 18, wherein said lid and said container are obtained by injection molding.

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