FR2990198A1 - Packing device for packaging food products, has prior peeling unit opening packing in partially sealed state, and sealing and tamper unit and flanges transversely arranged in discontinuous manner - Google Patents

Abstract

The device has two flanges (13, 23) attached with each other to define a closed position of a packaging space for receiving a food product. Sealing and tamper units (35, 36) cover the flanges in a closed position. The sealing and tamper units are pressed into an edge. The sealing and tamper units continuously cover edges in a transverse direction of the packing from the flange to the other flange. A prior peeling unit opens the packing in a partially sealed state. The sealing and tamper units and the flanges are transversely arranged in a discontinuous manner. An independent claim is also included for a method for manufacturing a packing device.

Description

PACKAGING FOR FOOD PRODUCT HAVING TWO SEALED PARTS TOGETHER IN THEIR REBORDS, AND METHOD OF MANUFACTURING THE SAME.

The present invention relates to a food product package comprising two parts with peripheral rims cooperating together and comprising means for sealing and tampering with the packaging which cover the edges in the closed position of the package, as well as a method of manufacture of this packaging. The invention applies in particular to the packaging of cheeses or cheese specialties, without limitation. It is known from document FR-A1-2 696 719 to seal a bell-shaped food product package mounted on a base, by heat-sealing a flat seal on the ribbed lower rim of the bell. and on the ridge also ribbed base, these flanges being provided level via a peripheral groove of the base receiving the rim of the bell below the edge of the base. To separate the bell from the base, it exerts traction on the peelable seal by means of a gripping tab which it is provided.

A major disadvantage of the package described in this document is that it requires the use of a seal separate from the bell and the base that must be attached to the respective edges of the two parts of the package. Another disadvantage of this package is that it requires the use of two peripheral edges defining in the closed position of the package a single sealing plane to fix the flat seal, which represents a constraint for the choice of the two parts of the packaging. US-B2-7, 946, 441 teaches using a peelable seal tape to seal a lid on a container containing a food product, the package being made of molded plastic. The ribbon is molded with the container and cooperates with the peripheral rim of the lid, but without any connection between this ribbon and the upper rim of the container.

An object of the present invention is to provide a novel food product packaging which overcomes the aforementioned disadvantages, the packaging comprising two parts which respectively have peripheral flanges cooperating with each other to define in a closed position of the packaging an internal space receiving the product, and comprising means for sealing and tamper with the package which cover the edges in the closed position of the package and which are formed in one piece with one of the flanges , or first edge. For this purpose, a package according to the invention is such that these means are driven into the other flange, or second flange, and are peelable along the second flange being adapted to define in this closed position: a state sealed and uninjured the package before its first opening, wherein these unpeeled means cover these flanges 15 continuously in a transverse direction of the package from the first to the second flange, and - a partially sealed state of the packaging testifying to anterior peeling of these means allowing the opening of the package, in which these means cover these flanges discontinuously in at least one transverse cutting plane of the package. By the term "two parts" is meant in the present description two functional units of the package, such as a base, a container or a flat or bell-shaped lid covering this base or container, for example, it being understood that one and / or the other of these parts 25 may not be monobloc but consist of several portions juxtaposed so as to form the base, container or lid, for example. Note that these two parts can be connected or not between themselves even in the open position of the package, being for example hinged by hinges. The term "peelable along this second rim" here means that the sealing and tamper-proof means of the package extend removably (ie tearable) along all or part of the periphery of this rim (this extension along only part of this periphery being used in particular in the case where the two parts of the package are interconnected for example by joints). By "transverse direction of the package" and "at least one transverse sectional plane of the package" is meant respectively a direction and at least one vertical plane intersecting the package from top to bottom and from the inside to the peripheral edges of the package when it is laid flat on a horizontal support. In particular, in said partially sealed state of the closed position of the package, the overlap 10 of the first and second flanges by the sealing and tamperproofing means which is discontinuous in said at least one transverse sectional plane means that these means have an interrupted surface of the flange transversely internal transverse outer edge in at least one area of the periphery of these flanges. According to another characteristic of the invention, said second flange may be arranged transversely outside (i.e. beyond) said first flange and thereby form an outer flange with respect to the first inner flange. According to another characteristic of the invention, said sealing and tamperproofing means may comprise at least one seal which is provided with a gripping tab for its peripheral peel, which is secured by bi-injection of said first flange and which is snapped into at least one peripheral groove of said second flange. It should be noted that this clipping or clipping can thus be carried out continuously on the periphery of the package in a single groove of the second flange, or alternatively discontinuously in a plurality of such grooves spaced on this periphery. It will also be noted that several gripping tabs 30 can thus be used for peeling off as many seals, for example a pair of tabs arranged back to back and peelable in opposite directions in one or more zones of the package (for example in a corner of it in the case of a generally polygonal packaging). Advantageously, said sealing and tamperproofing means may be adapted so that, in said two states of the closed package, said or each joint remains secured to: said first flange by covering an apex of said second flange, so as to providing in said partially sealed state a secondary seal of the package already open during consumption, and - an end portion of said second flange which extends said vertex transversely outward and downwardly forming said at least one groove in which said or each seal remains depressed, said or each seal being able to be peeled transversely only between this vertex and this groove so that, not yet peeled, it ensures a primary seal of the package because it is integral with said end portion of said second flange transversely with said first flange and that, when partially peeled, it covers said second flange transversely discontinuous with the first flange. According to another characteristic of the invention, said or each seal may comprise: a first non-peelable section transversely internal and horizontal, which is integral with said first rim and which tangentially covers said crown of said second rim, a second transversely outer non-peelable section 25 formed below the first section and having a transversely internal vertical leg wedged in said groove and a transversely external vertical leg surrounding an outer edge of this groove, these two legs being surmounted and interconnected by a horizontal leg extending substantially from an inner edge to that outer edge of the groove, and a third vertical peelable section, which connects the tab of said second section to said first section to two breakable peripheral connection areas and which is formed above said groove facing a transversely outer face of said vertex. According to another characteristic of the invention, said groove may have a transversely external edge which defines an outermost edge of said second flange and which is formed below said vertex, which has a transversely external face extending upwardly an edge transversely internal of said groove, and said transversely inner leg can be driven into the groove by being pressed against an inner face of said outer groove edge, said transverse outer leg being pressed against an outer face of said outer groove edge. It should be noted that this arrangement of the inner edge of the groove counter-flowing from its outer edge advantageously makes it possible to drain the serum formed in the case where the packaged product is a cheese or a cheese specialty. Advantageously, said first section of the or each seal may be formed in one piece with a vertical portion of said first flange in contact with a horizontal rib of said vertical portion, said rib being located immediately above said top of said second portion. flange in the closed position of the package so that this first section tangentially covers this vertex. According to a first exemplary embodiment of the invention, one of said parts is a bell-shaped lid or tray having said first flange with which said sealing and tamper-proof means are formed integrally, and the other part is a base or substantially flat cover respectively for this lid or for this tray and having said second flange in which these means are sunken. By "base" is meant here a tray for supporting the food product and to receive at its periphery the lid of the package. By "bell" is meant here an open lid or container having an apex, for example substantially flat or convex, which extends downwards by a peripheral lateral wall which may be substantially vertical, oblique and / or curved, or having a vertex inclined to the lower edge of the bell from a substantially rectangular bottom face of a vertical peripheral wall, oblique and / or curved of the bell, which wall further comprises two generally triangular lateral faces extending symmetrically l one from the other from this bottom face. It should be noted, however, that a packaging according to the invention could alternatively have these sealing and tamperproof means formed integrally with a base or flat cover and driven into a lid or a bell-type container. According to a second embodiment of the invention, one of said parts is a bell-type cover having said first flange with which said sealing and tamper-proof means are formed in one piece, and the other part is also a bell-type tray 15 having said second flange in which are buried these means. In general and particularly with reference to these examples of packaging parts according to the invention, it will be noted that the first and second flanges of these parts may have a peripheral contour of substantially circular, elliptical, oval, polygonal shape with corners rounded 20 (eg generally square or rectangular), or other. According to another characteristic of the invention, said sealing and tamperproofing means may be made of at least one food-grade thermoplastic material which is chosen to be flexible enough to seal the package and to force these means clipping into said second flange at an ambient temperature, for example equal to or greater than 16 ° C, this material being airtight at a refrigerated storage temperature of, for example, 4 ° C. Preferably, said sealing means and inviolability of the packaging are made of an opaque material based on at least one polyolefin, such as polyethylene, which is different from the material or materials (x) also polyolefin (s) used (s) for the part with which these means are formed in one piece.

As materials that can be used to form a container-like packaging part or bell-shaped lid, all flexible or rigid materials may be mentioned, for example wood, cardboard, metal or a plastic material that is advantageously transparent in the case of a cheese bell, such as a polyolefin such as polypropylene, without limitation. As materials that can be used to form a base-type packaging part, mention may be made in particular of all plastic materials, such as oxygen-permeable polyolefins in the case of packaging or cheese, such as, for example, polystyrene or polypropylene, without limitation. A manufacturing method according to the invention of a package as defined above essentially comprises: in the same impression of a bi-material injection mold of the lock type, a successive injection of two thermoplastic materials respectively intended to form said sealing and tamperproofing means and the part with which these means are to be formed in one piece, so that these means thus injected are integral without adhesive of this part, then 20 - a mechanical depression by pressure of a transversely outer ribbed section of these means in at least one groove of said second flange of the other part (this depression can be achieved by the food product conditioner or in an automated manner). It should be noted that this integration of the sealing function 25 and the function of opening the package by bi-injection directly during the injection of the corresponding part (such as a bell-shaped cover, for example ) avoids the usual use of a peelable sealable seal. As indicated above, this second flange into which the sealing and tampering means 30 are driven is advantageously formed beyond the first edge of which these means are integral.

Other features, advantages and details of the invention will emerge on reading the following description of several examples of embodiments of the invention, given by way of illustration and not limitation, the description being made with reference to the accompanying drawings, among which: Figure 1 is a top and perspective view of a bell of a base and bell package according to an example of the invention before its assembly on the base, the bell being provided with sealing means and 4. The inviolability of the package, FIG. 1A, is a partial cross-sectional view of the flange of the inset bell of FIG. 1 with which integral seals are formed in one piece, the FIG. 2 is a view from above and in perspective of the base of the package according to this example of the invention, which is intended to receive the bell provided with the sealing and tamper-proof means according to FIG. e 2A is a partial cross-sectional view of the rim of the medallion pedestal of FIG. 2, FIG. 3 is a partial cross-sectional view of the rims of the package according to the example of FIGS. 1A and 2A continuously covered with joints, in the closed position and in a sealed and inviolate state, FIG. 4 is a view from above and in perspective of the package of FIG. 3 shown in the closed position but in a partially sealed state due to the beginning of peeling of said means, the FIG. 4A is a partial cross-sectional view showing the edges of the inset package of FIG. 3 discontinuously covered by each seal due to this peel, FIG. 5 is a top and perspective view of the bell. of the package of FIG. 4 after complete peeling of said means and separation of the bell from the base, showing a section of each joint remaining integral with the bell, FIG. 5A is a partial view of cross section of the flange of the inset bell of Figure 5 which is integral with this section of the seal, Figure 6 is a top view and in perspective of the base of the package of Figure 4 after complete peeling said means and separation of the bell with the base, showing another section of each joint remaining fixed to the base, Figure 6A is a partial cross-sectional view of the edge of the inset base of Figure 6 which remained integral with this other section of each Figure 7 is a top and perspective view of the packaging of Figures 5 and 6 after reclosing the bell on the base, Figure 7A is a partial cross-sectional view of the flanges of the bell and the base. inset in Figure 7 coated with the remaining portions of each seal in the closed and partially sealed position of this Figure 7, Figure 8 is a perspective view of the interior of a bell according to a of the invention, of triangular cross-section and usable in relation to a base inclined bottom such as that of Figure 9, Figure 9 is a top view and perspective of a base according to a variant of the invention , with inclined bottom and usable in relation to a bell such as that of FIG. 8, FIG. 10 is a side view of a base and bell package according to the variant of the invention corresponding to FIGS. 8 and 9, showing in addition, its sealing and tamperproofing means, FIG. 11 is a view from above and in perspective of a bell-type lid of a container and lid packaging according to another example of the invention before assembly on the tray, the lid being provided with the sealing means and inviolability of Figure 1, Figure 11A is a partial cross-sectional view of the rim of the lid inset of Figure 11 with which are formed in one piece gaskets included in these means, FIG. 12 is a view from above and in perspective of the container of the packaging according to this other example, intended to receive the lid provided with the sealing and inviolability means of FIG. 11, FIG. 12A is a partial cross-sectional view of the rim of the medallion tray of FIG. 12, FIG. 13 is a top and perspective view of the package according to this other example, showing the lid and the tray of FIGS. 11 and 12 in the closed position and in a sealed and inviolate state, FIG. 13A is a partial cross-sectional view of the flanges of FIGS. 11A and 12A inset in FIG. 13 and continuously covered with each seal, in the closed position and the sealed and inviolate state of this Figure 13, Figure 14 is a top view and in perspective of the package of Figure 13 shown in the closed position but in a partially sealed state due to the beginning of FIG. 14A is a partial cross-sectional view showing the edges of the inset package of FIG. 14 discontinuously covered with each seal due to this peel, FIG. 15 is a top view, and FIG. in perspective of the lid of the package of FIG. 14 after complete peeling of said means and separation of the lid from the container, showing a section of each joint remaining fixed to this lid, FIG. 15A is a partial cross-sectional view of the the flange of the inset lid of Figure 15 which remained integral with this section of each seal, Figure 16 is a top view and in perspective of the container of the package of Figure 14 after complete peeling said means 25 and separation of lid with the tray, showing another section of each joint remaining integral with this tray, Figure 16A is a partial cross-sectional view of the rim of the bar FIG. 17 is a top view in perspective of the packaging of FIGS. 15 and 16 after reclosing its lid, and FIG. 17A is a medallion of FIG. 16 of which this other section of each seal has remained integral; a partial cross-sectional view of the edges of the lid and the inset tray in FIG. 17 coated with the remaining portions of each seal in the partially sealed closed position of this FIG. 17. The package 1 illustrated in FIGS. 1-7A comprises a bell-shaped bell 10 with vertex 11, for example flat and with an obliquely vertical oblique peripheral wall 12, a generally flat base 20 adapted to receive bell 10 in the closed position of FIGS. 3 and 4, and sealing and tamper-proof means 30 of FIGS. the packaging 1 intended to cover in a partially removable manner two respectively lower peripheral edge 13 of the bell 10 and outer 23 of the base 20 which are a adapted to cooperate with each other in the closed position. In the illustrated example, these flanges 13 and 23 both have a rectangular shape with rounded corners. Note however that other polygonal shapes (advantageously with rounded corners) or even elliptical, oval or circular are usable for the contour of these flanges 13 and 23. As shown in Figure 1A, the lower edge 13 of the bell 10 is formed by a horizontal peripheral rib 14 which is formed protruding on the outer face of the oblique side wall 12 of the bell 10 and which is extended by a vertical lower edge 15 formed under the rib 14 transversely outside the rest of the lateral wall 12 situated above this rib 14. As can be seen in FIG. 1, the sealing and tamper-proofing means 30 consist in this example of two identical gripping tabs 31 and 32 each attached to a sealing gasket 33, 34 which, as illustrated in FIG. 1A, is formed of a three-dimensional peripheral ribbon (ie of non-planar cross section) formed in one piece with the rim 13 of the bell 10 by successive bi-injection of thermoplastic materials intended to form each seal 33, 34 and the bell 10 in the same cavity of a lock injection mold.

More specifically, each gasket 33, 34 has a stepped cross-sectional shape comprising, transversely from the inside to the outside: a generally horizontal upper peripheral portion which extends level with the rib 14 (ie at the same height as this) and which is secured to both the free edge and the lower face of the rib 14 and an upper zone of the underlying vertical edge 15, it being specified that the lower face of the section 35 presents successively from the rib 14 a bulge 35a curved upwards, a flat horizontal zone 35b and a thinned external end 35c peelable, - an intermediate peripheral portion 36 vertical extending from the outer end thinned 35c over a height substantially equal to that of the vertical edge 15 of the flange 13 and which terminates in a thinned lower end 36a also breakable by peeling, and A transversely external lower peripheral section 37 comprising a generally horizontal tab 37a extending from the thinned lower end 36a over a transverse width greater than that of the upper section 35 and which bears on its underside two spaced vertical legs; 37b and 37c respectively in the transverse direction, it being specified that the outer leg 37c has a height greater than that of the inner leg 37b and is provided near its lower end with a bulge 37d on its transversely internal face. look at the other leg 37b. As illustrated in FIG. 2A, the outer rim 23 of the base 20 has essentially a peripheral groove 24 defined by two transversely internal 25 and external 26 edges which are oblique while being slightly flared and which are interconnected by a bottom 27, for example dish. The outer groove edge 26 terminates in an upper end 26a bent outwardly and then downwardly. The inner groove edge 25 has a lower portion 25a in height which is slightly greater than that of the outer groove edge 26 and which extends transversely inwards, via a short horizontal recess 25b, by an upper portion 25c forming the oblique external face of a vertex 28. This apex 28 has a pointed top zone 28a located substantially in counterpart to the upper end 26a of the outer groove edge 26, and an inner vertex face 28b which extends downwardly from also obliquely from the top zone 28a and which is then extended by the horizontal surface or bottom 29 of the remainder of the base 20 below its rim 23. As shown in Figure 3, each seal 33, 34 made previously secured to the bell 10 is pressed by clipping via the inner leg 37b of its lower outer portion 37 into the groove 24 of the rim 23 of the base 20, so that internal amber 37b is plated via its external face against the outer groove edge 26 and that its outer leg 37c opposite is wedged via its bulge 37d against the curved upper end 26a of the external groove edge 26 surrounding the latter over its entire height. In other words, it is understood that because of this clipping the two legs 37b and 37c of each seal 33, 34 enclose the outer groove edge 26. It is also seen in the closed position of Figure 3 that the upper section horizontal 35 of each seal 33, 34 wife by its underside the contour of the summit zone 28a of the top 28 by tangentially covering this zone 28a, and the peelable intermediate portion 36 of each seal 33, 34 surrounds the outer face 25c of the top 28 so that its thinned lower end 36a matches the recess 25b of the inner edge 25 of the groove 24. As shown in Figure 4, when the consumer exerts a peripheral traction on the gripping tongues 31 and 32 in a horizontal plane (It being specified that this traction could alternatively be carried out in a vertical or oblique plane), it follows a peeling of the only vertical intermediate section 36 of each corresponding gasket. 33, 34 via its thinned ends 35c and 36a (this removed section 36 is shown by dashed lines in FIG. 4A), which results in a peripheral transverse discontinuity of the surface of each gasket 33, 34 between the apex 28 and the groove 24 that it covers (see for example a transverse sectional plane P in Figure 4). It follows from this transverse peripheral discontinuity that it is possible to clear completely after this peripheral peel the rim 13 of the bell 10 of the rim 23 of the base 20 as illustrated in FIGS. 5 and 6. Following this first opening, the upper horizontal section 35 of each seal 33, 34 remains connected to the flange 13 of the bell 10 (see Figure 5A) and the lower outer portion 37 of each seal 33, 34 remains secured by its leg 37a and its two legs 37b and 37c of the groove edge external 26 (see FIG. 6A). FIGS. 7 and 7A show the partially sealed state obtained when the package 1 is closed again after each of its openings, with in particular a secondary sealing ensured by the fact that the upper section 35 of each joint 33, 34 always covers the top 28 of the rim 23 of the base 20, even if the primary seal is no longer ensured due to the peeling of the vertical intermediate section 36 of each seal 33, 34. FIGS. 8 to 10 show a variant of such a package 1 to bell 10 and base 20 and whose sealing and tamperproof means 30 are similar to those just described in connection with Figures 1 to 7A, this package 101 differing essentially from the package 1 by the respective geometries of its bell 110 (see FIG. 8) and its base 120 (see FIG. 9). The bell 110 here has an apex 111 inclined up to its lower rim 113 from a substantially rectangular and vertical bottom face 114 of the peripheral wall 112 of the bell 110, which wall 112 also has two lateral faces 115 and 116 25 substantially triangular and vertical extending symmetrically from each other from this bottom face 114. As shown in Figure 8, the inner surface of the inclined top 111 of the bell can be advantageously provided with a first series of ribs 117 (four in this example, near the four corners of this inner surface) to allow stacking of the bells 110 (independently of the pedestals 120 and food products), and a second series of ribs 118 regularly spaced to ensure a centered centering of the product relative to the bell 110. The base 120 for receiving the bell 110 which is illustrated in Figure 9 has, below its outer rim 123, an inclined bottom 129 5 which is particularly adapted to receive a cheese of geometry similar to that of the bell 110 described above, with the bottom face 114 of the bell 110 which surrounds the most 129a of this inclined bottom 129. Advantageously, this zone 129a may have a shape of channel (not shown), in the bottom of which one can have serum absorption means, such as a blotter or the like. The package 201 according to the example illustrated in FIGS. 11 to 17A differs only from the one previously described with reference to FIGS. 1 to 7A, in that a bell-shaped cover 210 of different dimensions from those of FIG. bell 10 of the package 1 (see in particular the height of the lid 210 which is less than that of the bell 10), and a tray 220 (ie a relatively deep hollow container for supporting the product) in place of the base Plate 20 of the package 1. As to the respective flanges 213 and 223 of the cover 210 and the tray 220 visible in FIGS. 11A and 11B, they are similar to those of the bell 10 and the base 20 illustrated in FIGS. 1A and 1B. . It is the same for the sealing and tamper-proof means of the package 201 which are formed integrally with the rim 213 of the cover 210 and which are identical or similar to those of the package 1, as shown in Figure 11A. As a result, the seals 33 and 34 that comprise these means 30 cooperate with these flanges 213 and 223 in the sealed and inviolate state of the closed position illustrated in FIGS. 13 and 13A in the same manner as for the packaging 1 of FIG. FIG. 3, and in the partially sealed state of this closed position illustrated in FIGS. 14 and 14A in the same manner as for the packaging 1 of FIGS. 4 and 4A with the peeling of the intermediate section 36 of each joint 33, 34 generating the aforementioned transverse peripheral discontinuity. It is then possible to completely disengage the cover 210 from the tray 220, as illustrated in FIGS. 15 and 16 with, following this first opening, the upper horizontal section 35 of each seal 33, 34 which remains connected to the rim 213 of the bell 210 ( see Figure 15A) and the lower outer portion 37 of each seal 33, 34 which remains secured by its tab 37a and its two legs 37b and 37c of the outer groove edge 26 (see Figure 16A).

FIGS. 17 and 17A show, when the package 201 is closed, a secondary seal which is always ensured because the upper portion 35 of each seal 33, 34 always covers the top 28 of the rim 223 of the tray 220. As explained above, the materials preferably used for the two parts 10, 110, 210 and 20, 120, 220 of the packages 1, 101, 201 are thermoplastics, for example polyolefinic materials, for example with a lid or bell 10, 110, 210 transparent polypropylene and a pedestal or tray 20, 120, 220 opaque polystyrene, especially chosen for its oxygen permeability in the case of the packaging of a cheese. As for the material that can be used for the or each seal 33, 34, it is advantageously of any thermoplastic material preferably based on a polyolefin sufficiently flexible to allow it to be clipped into the groove 24 at about 16 ° C. and hermetically sealed. in ambient air at a storage temperature of 4 ° C (for example a polyethylene).

Claims (12)

CLAIMS1) Packaging (1, 101, 201) for a food product comprising two parts (10, 110, 210 and 20, 120, 220) which respectively have peripheral rims (13, 113, 213 and 23, 123, 223) cooperating with each other. with one another to define in a closed position of the package an internal space receiving the product, and comprising means for sealing and tampering (30) of the package which cover the flanges in the closed position of the container. and formed integrally with one of the flanges, or first flange (13, 113, 213), characterized in that these means are sunk into the other flange, or second flange (23, 123, 223), and are peelable along this second flange being adapted to define in this closed position: - a sealed and inviolate state of the package before its first opening, wherein these unpeeled means cover these flanges continuously in a transverse direction of the packaging from the first at the second rim, and - a partially sealed state of the package testifying to an earlier peeling of these means allowing the opening of the package, in which these means cover said flanges discontinuously in at least one cutting plane transversal (P) of the package. 2) Packaging (1, 101, 201) according to claim 1, characterized in that said second flange (23, 123, 223) is arranged transversely outside said first flange (13, 113, 213). 3) Packaging (1, 101, 201) according to claim 1 or 2, characterized in that said sealing and tamperproof means (30) comprise at least one seal (33, 34) which is provided with a gripping tab (31, 32) for its peripheral peel, which is secured by bi-injection of said first flange (13, 113, 213) and which is embedded in at least one circumferential groove (24) of said second flange ( 23, 123, 223). 4) Packaging (1, 101, 201) according to claim 3, characterized in that said sealing and tamperproof means (30) are adapted so that, in said two states of the closed package, said or each seal (33, 34) remains integral with: - said first flange (13, 113, 213) covering a top (28) of said second flange (23, 123, 223), so as to ensure in said partially waterproof state secondary of the package already opened during consumption, and - an end portion (24, 26) of said second flange which extends said vertex transversely outwardly and downwardly forming said at least one groove (24) wherein said or each seal 15 remains depressed, said or each seal being able to be peeled transversely only between this vertex and this groove so that, not yet peeled, it provides a primary seal of the package because it is solidary of said terminal portion of said seco nd rim extends transversely with said first rim and, once partially peeled, covers said second rim transversely discontinuous with said first rim. 5) Packaging (1, 101, 201) according to claim 4, characterized in that said or each seal (33, 34) comprises: - a first non-peelable section (35) transversely internal and horizontal, which is secured to said first flange (13, 113, 213) and tangentially covering said crown (28) of said second flange (23, 123, 223), - a second transversely outer non-peelable section (37) formed below the first section and having a transversely internal vertical leg (37b) wedged in said groove (24) and a transversely external vertical leg (37c) surrounding an outer edge (26) of said groove, said two legs being surmounted and interconnected by a horizontal leg (37a). ) extending substantially from an inner edge (25a) to this outer edge of the groove, and - a third vertically peelable section (36), which connects the lug of said second section to said first section into two outer peripheral connection zones. es (35c and 36a) and which is formed above said groove facing a transversely outer face (25c) of said vertex. 6) Packaging (1, 101, 201) according to claim 4 or 5, characterized in that said groove (24) has a transversely outer edge (26) which defines an outermost edge of said second flange (23, 123, 223 ) and which is formed below said vertex (28), which has a transversely outer face (25c) extending upwardly a transversely inner edge (25a) of said groove, and in that said transversely inner leg (37b) is depressed in the groove being pressed against an inner face of this outer groove edge (26), said transversely outer leg (37c) being pressed against an outer face of this outer groove edge. 7) Packaging (1, 101, 201) according to claim 5, characterized in that said first section (35) of said or each seal (33, 34) is formed in one piece with a vertical portion (15) of said first flange (13, 113, 213) in contact with a horizontal rib (14) of said vertical portion, said rib being located immediately above said vertex (28) of said second flange (23, 123, 223) in the closed position of the package so that this first section tangentially covers this vertex. 8) Packaging (1, 101) according to one of claims 1 to 7, characterized in that one of said parts is a lid or tray type bell (10, 110) having said first flange (13, 113) with which said means sealing and tamper evident (30) are formed integrally, and in that the other part is a substantially flat base or cover (20, 120) respectively for this lid or for this tray and having said second flange (23, 123) in which are buried these means. 9) packaging (201) according to one of claims 1 to 7, characterized in that one of said parts is a bell-type cover (210) having said first flange (213) with which said sealing means and tamper (30) are formed integrally, and in that o the other part is a tray (220) also bell-type having said second flange (223) in which are buried these means. 10) Packaging (1, 101, 201) according to one of the preceding claims, characterized in that said sealing means and inviolability (30) are made of at least one food thermoplastic material which is chosen flexible enough to ensure the sealing the package and depressing these means by clipping into said second flange (23, 123, 223) at a temperature for example equal to or greater than 16 ° C, this material being airtight at a temperature for example refrigerated storage of 4 ° C. 11) Packaging (1, 101, 201) according to claim 10, characterized in that said sealing and tamperproof means (30) of the package are made of an opaque material based on at least one polyolefin , such as a polyethylene, which is different from the polyolefin material (s) (s) used for the part (10, 110, 210) with which these means are formed in one piece. 12) A method of manufacturing a package (1, 101, 201) according to one of the preceding claims, characterized in that it comprises essentially: - in the same footprint of a bimaterial injection mold type lock, a successive injection of two thermoplastic materials respectively intended to form said sealing and tamperproof means (30) and the part (10, 110, 210) with which these means to form in one piece, so that these means thus injected are integral without adhesive of this part, then - a mechanical depression by pressure of a ribbed transverse external section (37) of these means in at least one groove (24) of said second flange (23, 123, 223) of the other part (20, 120, 220).