BRPI0922671B1 - COVER PART FOR A CONTAINER, AND CONTAINER - Google Patents

Abstract

"container lid portion, and container" The invention relates to a container lid portion (2), said lid portion substantially made of a thermoplastic material and comprising a connecting portion (5) for connecting to a rim of a container part and a lid (4) which is pivotally connected to said connecting portion (5), said connecting portion comprising an access opening (6) and a first circumferential flange (7) surrounding the said access opening (6), said cap (4) comprising a circumferential cap flange (8) extending to said connecting portion (5), perimeters of said cap flange (8) and first flange (7) ) mutually adapted to allow said cap (4) to be sealed over said first flange (7) of said connecting portion (5), and an area of said access opening (6) be at least 50cm 2 .

Description

“COVER PART FOR A CONTAINER, AND, CONTAINER” Basics

The present invention relates to a lid part for a container.

WO 2007 / 142.522 of this Applicant discloses such a cap part. In the container assembly disclosed in the order, a portion of the container has a circumferential wall that can be made substantially of cardboard coated with a material to seal it from the contents of the container, and a lid part coupled to a rim of the portion container. The Claimant uses the infant milk powder container. The cap part has a connecting portion and a cap that is hinged or pivotally coupled to the connecting portion. The cover rests on the connection portion. The closure of the cover over the connection portion can be improved.

WO 2008 / 34.172 discloses a flexible container lid, which can be sealed, with a second pivotable portion. The second portion is closed around a rim surrounding an opening of the container. The report calls it “hugging tension”. The rim forms a part formed integrally with the container wall. The second portion should pivot around or jump out of a first portion connected to the lid. This may require almost elastic behavior. This construction overloads the cover, particularly when frequent opening and closing is necessary, while maintaining a good seal. In addition, the cover is not attached to another part via the hinge.

EP-1,625,948 discloses a liquid paint package having a plastic wall with a flange integrally formed peripherally. It has a plastic cover having a wall groove to receive the flange and an internal circumferential protrusion locking under the mentioned peripheral flange, providing a quick fitting action. The lid is not pivotally connected to the rest of the packaging.

JP - 2004 / 1.815 reveals a plastic container having a separate lid. The revealed embodiments have several interlocking rings and circumferential projections and corresponding recesses that make these covers very laborious to open in daily use.

JP- 2006-282.199 discloses a container for powdered milk, for example. The container has a separate lid. The lid has a second circumferential skirt attached to the outer wall of the container and a circumferential skirt connected to the lid. A removable circumferential strip connects the first and second skirts. The first skirt has a first projection hooking behind a circumferential projection part on the outside of the container wall.

Us - 6,889,867 discloses a plastic container comprising a lid with a closing flap to seal the container closed to prevent loss of moisture, ie moisture leaving the container. The lid is placed over the rest of the container and rotated, resulting in thread matching. The seal of the lid over the rest of the container is obtained by using a crest. The lid also has a relatively small, circular dispensing door, having a notched wall through which cleaners can pass and leave the container. The dispensing door has a circumferential wall for securely receiving a circumferential wall of the closing flap. The lid is designed to keep moisture inside the container. For this purpose, the opening is round and kept as small as possible.

US 4,284,200 reveals a child-proof dispensing closure. The lid has a rim and the opening is surrounded by a rim. Both rims have an extended lip so that the lid fits quickly into the rim surrounding the opening. The lid has an ear that is slightly spaced from a fulcrum, so that a lever means is needed to open the lid, thus providing a child-proof closure.

US 6,761,279 discloses a package for viscous foods. The package has a container and a closing accessory on top of the container. The closure has a base and a lid. The base has specific provisions for cooperating with provisions on the container to couple the base to the container in such a way that the rim of the container is kept free to seal a sealing membrane over the rim. Coupling provisions make this packaging relatively complex. In addition, the lid seal can be improved. In addition, the stacking of these packages may compromise the sealing of the lid.

Summary of the invention

The invention aims to provide a lid part for a container that is easy to open and close in daily use.

Another objective of the invention is to provide a lid part that provides a good, preferably airtight, seal of a container, preferably also after frequent daily use.

Another objective of the invention is to provide a lid part that allows a container that produces a minimum amount of waste.

According to a first aspect of the invention, this is achieved by a lid part for a container, said lid part being made substantially of a thermoplastic material and comprising a PC for connection to a rim of a container part and a lid that is pivotally connected to said connection portion, said connection portion comprising an access opening and a first circumferential flange surrounding said lighting opening, said cover comprising a circumferential cover flange extending towards said connection portion , perimeters of said cover flange and first flange mutually adapted to allow said cover to close in a sealed manner on the first flange of said connecting portion, and an area of said access opening having at least about 50cm ² .

In one embodiment, the present invention relates to a powdered infant nutrition package. In such a package, it is important that foreign objects do not enter the package and contaminate the dust. On the other hand, the package needs to be opened repeatedly.

Baby milk formula is usually recovered from the container by using a measuring spoon. The measuring spoon is often included in the packaging. Thus, to be able to properly remove dust from the container, the access opening must be as large as possible.

All of these requirements seem to be difficult to contain in a single container. For example, the easiest way to provide good content sealing, however, is to make the access opening as small as possible. In addition, a better seal is usually obtained with permanent (semi-) closing means.

The lid part of the invention, however, makes this possible.

The present invention provides a lid portion for a container with an access opening large enough that the contents (e.g., powder) can be scooped out of the container, while having a seal that effectively reduces the entry of foreign objects. Surprisingly, it was found that the present lid part, with a large access opening, could be repeatedly closed, while maintaining a good seal.

The lid portion of the present invention provides a good seal, which prevents foreign objects from entering a container covered by it. In addition, the lid of the lid parts needs to be opened and closed frequently more times a day, and provide a good seal after frequent use. Preferably, the seal is easily obtained. In fact, it has been found that in one embodiment, about 2-5N of opening force would be acceptable. For closing force, in one embodiment, a force of about 6 - 15N would be acceptable.

Since the container it covers needs to be disposable, it will be cheap to produce in large quantities and provide minimal scrap. In addition, it would be beneficial if the lid part were easy to handle in production, as well as in the production of a complete container. In addition, a good seal is particularly desired if the contents of the package are hygroscopic. A better closure will reduce the exchange of air (with a high water content) between the inside and outside of the package, thereby reducing the formation of clumps in the hygroscopic material, for example, infant formula milk. Thus, the present invention is particularly useful for storing infant milk powder in an environment with a tropical climate.

The lid portion of the invention can be used for containers, for example, with a cardboard wall, but not limited to such use. Typically, such a cardboard wall is covered or lined with one or more layers of sealing to seal contents of the container against environmental influences. An example of such packaging is disclosed in Applicant's WO 2005 / 75,314. For jurisdictions in which this is of interest, these documents are hereby incorporated by reference as if fully presented in this report.

The line set sizing design is particularly suitable for use with a powder storage container. In fact, it is well suited for storing hygroscopic powder, in particular, food products such as infant formula milk. Manual opening and closing preferably requires very limited effort and / or force. Preferably, the lid can be opened manually with one hand. This is particularly relevant for packing infant formula milk, since the mother must be able to open and close the package while carrying the baby.

In order to prevent the hand from being in intense contact with the contents, the lid is preferably provided with fixing provisions to fix and contain the removal measuring spoon. This further limits the choice of dimensions. The handle dimensions of such a spoon are therefore limited. On the other hand, this can also limit the dimensions of the packaging container. The spoon handle in one embodiment is long enough to allow a person to reach the bottom of the container. In one embodiment, said first circumferential flange has a first perimeter close to said connection portion and a second perimeter close to the rim of said flange at an end of said flange away from said connection portion, said second first circumference circumferential flange being larger than its first perimeter, and said cap has a first inner perimeter close to said cap and a second inner perimeter close to the rim of said first flange, said second inner perimeter of said cap being smaller than said first perimeter close to the rim of said cover flange, said perimeters of said cover flange and the first flange mutually adapted to allow said cover to seal closed on said first flange of said connection portion, with its flange with cap surrounding the menc ionized first flange. This allows for easy closing and opening, especially for daily use. In addition, by sealing the cover flange around the first flange, it is easier to loosen the cover part after molding.

The first flange on the coal production apparatus, together with the cap flange in one embodiment, provides a quick lock seal. The corresponding cover flange (sealing bead on the cover) thus interlocks with the other first flange, in the appropriate sealing interference mode. This sealing interference can provide adequate sealing pressure to prevent moist air from entering or leaving the container, or can be implemented to ensure a maximum gap sufficiently small to prevent foreign objects from entering the container. These characteristics also allow to provide sealing performance using conventional engineering plastics and can help to avoid additional cost of bi-injected elastomeric materials.

In addition, in one embodiment, the flange and cover flange, which can also be referred to as chimney characteristics and quick-fit bead, respectively, could be interchanged to affect the same mechanism and / or two “chimney” characteristics could be used alternatively. Note that the chimney feature may have similar curvature on the inner and outer wall, which allows it to be molded by injection so that the feature can be removed from the mold without special floating cores and therefore allow for faster, lower cooling cycle time and therefore lower cost. In addition, the arrangement of these sealing characteristics allows for robust quick-fit sealing performance for holes of relatively large diameter.

In addition, the flange arrangement or quick-fit seal characteristics can be fine-tuned to allow sufficient sealing performance, adequate opening force and adequate closing force. In addition, the retention provided by the quick-fit seal prevents the lid from opening partially or fully or partially opening when the packaging is disturbed by external forces. The specific curvature, slope and undercut geometry of the flanges (chimney and sealing bead characteristics) and their mounted interference can be fine-tuned to vary the sealing pressure, opening and closing force as needed.

In one embodiment, the access opening area is at least about 60 cm. This allows for even better one-handed access. In one embodiment, the access opening area is at least 75 cm ² .

In one embodiment, the access opening area is less than about 250 cm. In this way, it is possible to provide easy access from an adult hand, and also allow the lid to be closed closed in a simple action. In one embodiment, the access opening area is less than about 200 cm ² . These upper and lower limits provide a great compromise between easy access for the human hand, sufficient rigidity, good closure and the possibility of providing a ladle or spoon that can be held in the lid and reach the bottom of a container set.

In an embodiment of the invention, said first flange limits with said access opening. This can further increase the stiffness of the lid part.

In one embodiment, said first flange fan-outwards from said access opening, thereby increasing a perimeter of said first flange.

In one embodiment, the aforementioned first circumferential flange circumferentially at its outer periphery thickens near, or, in the aforementioned rim of said first flange. Alternatively or additionally, the inner periphery of the cover flange thickens near or in the aforementioned rim.

In one embodiment, said second inner perimeter of said cap flange is about 2-7% smaller than said first perimeter of said connecting portion. Especially when made from a thermoplastic material, it has been found that this provides a good seal, but remains easy enough to open.

In one embodiment, said access opening is substantially round or substantially elliptical. This will provide, in most cases, a moisture-proof seal. In some applications, even a rectangular opening with rounded corners could be acceptable in relation to the degree of sealing. These shapes allow a good seal. In order to provide a moisture-proof seal for hygroscopic powders, it is preferred that large straight parts (in view of the dimensions discussed) are avoided at the access opening or first flange and the cover.

In one embodiment, an area of said access opening is at least 50% of the area of the connecting portion. This allows enough space to allow a hand to pass with a ladle to collect content. On the other hand, it allows proper sealing and allows a suitable ladle or spoon to be attached inside the lid.

In one embodiment, an area of said access opening is about 60-70% of the area of the connecting portion. This appears to be an appropriate compromise.

In one embodiment, an internal diameter of the access opening is at least 9-13 cm. In one embodiment, a diameter of the connecting portion is at least 10-13 cm. These dimensions provide a good seal and sufficient container content.

In one embodiment, said first flange is made of a thermoplastic material allowing its perimeters to expand when placing said cap on said first flange, and where said first and second perimeters of said cap flange, if said cover is not closing said opening, it is smaller than the perimeters of said first flange.

In one embodiment, the said thickness of said first flange, in view of its thermoplastic material, is selected to provide a rigid flange.

In one embodiment, said cap part is made of a thermoplastic polymer selected from the group consisting of polyethylene (PE) and polypropylene (PP). These materials are easy to obtain and to process. In addition, these materials provide an amount of flexibility and elasticity that allows for good sealing and daily use. If desired, some of the parts of the cover part can be made of a more elastic rubberized material in a co-molding process. A cover flange closing around the first flange can, for example, be molded from a more elastic polymeric material, the material of which is known in the art. Alternatively, a final part of the cover flange can be made of a more elastic rubberized material. This can be produced in a co-molding process.

In one embodiment, said cap is of a thermoplastic material having an elasticity so as to allow airtight sealing of said cap over said connecting portion, via said cap flange over said first flange.

In one embodiment, said connection portion comprises a wall provided with said access opening, and said first flange extends from said wall, said wall and said cover when closing said access opening providing closure for a top of said container part.

In one embodiment, said connection portion comprises a circumferential ring having a circumferential groove for receiving said ring from said container part. In one embodiment, a circumferential area of said circumferential ring is larger than the area of the access opening.

In one embodiment, said connection portion comprises stacked meats. In another embodiment, said stacked meats are provided in positions around the first flange. These meats allow stacking of lid parts during production of the containers, and also allow the containers to be stacked. The position of the meats prevents loads on the lid, and forces from the lateral direction.

The invention further relates to a container assembly comprising a container portion with a circumferential wall and a base wall, and a lid portion comprising a connection portion for connection to a rim of said circumferential wall and a lid that is pivotally connected to said connection portion, said connection portion comprising an upper wall provided with an access opening that can be sealed with said cover, and said connection portion is provided with stacking provisions that involve said access opening and which are complementary to the stacking provisions on the basis of said container part.

In an alternative, the invention aims to improve the closure of a container assembly.

In accordance with this aspect of the invention, this is accomplished with a container assembly comprising a container portion with a circumferential wall and a base wall, and a lid portion comprising a connection portion for connection to a rim of said circumferential wall and a cover that is pivotally connected to said connection portion, said connection portion comprising an upper wall provided with an access opening that can be sealed with said cover, and said connection portion provided with stacking provisions that involve the said access opening and which are complementary to the stacking provisions at the base of said container part.

The invention additionally provides a lid portion for a container assembly, said lid portion comprising a connection portion for connection to a rim of a container portion and a lid which is pivotally connected to said connection portion, said portion connecting connection comprising a U-shaped circumferential ring for receiving an upper edge of a side wall of a container part, where an inner wall of said U-shaped ring comprises reinforcement ribs extending beyond the legs of said shaped ring U, and said connecting portion comprising a circumferential abutment surface bordering an upper surface of said cover portion, said reinforcement ribs and said abutment surface mutually positioned so that, when said cover portion is stacked on a second cover part, lower endings extended from the mentioned the reinforcement ribs rest on said circumferential abutment surface of said second lid part, while maintaining the legs of said U-shaped rim of said free lid part of said circumferential abutment surface of said second cover part.

The inventions describe everything related to improving the closure of a container. In fact, they all refer to improving the reliability of this closure. In this invention, stacking provisions are provided so that they wrap around the lid when it seals the access opening. The stacking provisions on the connection portion are thus arranged around the access opening. Thus, when container assemblies are stacked on top of each other, they do not load the lid with forces that could compromise the seal. Since containers are often used for powdered milk for babies and infants, for example, it is very important that the container set is sealed and remains sealed.

In one embodiment, said stacking provisions on said connecting portion comprise meats. These meats can be easily produced, for example, as extended wall parts. Alternatively, one or more rims can be provided around the access opening. These rims are positioned to allow opening and access to the lid for opening and closing.

In one embodiment, the aforementioned meats are positioned in corners of a rectangle that surrounds the aforementioned cover by sealing the aforementioned access opening. At and position the stacking provisions over the connection portion in this way, stacking without rotation becomes possible.

In one embodiment, the height of said meats is at least the height of said cover when sealing said access opening. In fact, when the stacking provisions on the connecting part are at least as high as the lid, they prevent the bottom of a next container set from stacking on top of this container set from simply touching the lid.

In one embodiment, said connection portion comprises a circumferential ring for receiving an upper edge of a side wall of said container part in a groove, the inner perimeter of said ring being complementary to the perimeter involving said stacking provisions of the mentioned lid part to provide complementary stacking means for stacking a series of lid parts. In this way, the stacking provisions on the connecting part have a function during production, that is, keeping the lid parts stacked and positioned and then keeping the sets of containers securely stacked without loading the lids.

In an embodiment of the U-shaped rim lid, said abutment surface is connected to said U-shaped rim and defines an access opening that is closed by said lid. The invention further relates to a container comprising the lid part as described above, and a container part, where said container part comprises a bottom and connected to this bottom is a circumferential container part ending in a ring for receiving said rim. cover part.

The various aspects explained in this patent can be combined to provide additional advantages. Various aspects described here, shown in the drawings or described in the claims may form part of an order split.

Description of the drawings

The invention will be further elucidated with reference to an embodiment of a lid part and a container assembly using this lid part shown in the attached drawings, where they are shown in:

figure 1 the use of a lid part over a container set;

figure 2 is a top perspective view of an open lid portion;

figure 3 is a perspective view of figure 2 from below;

figure 4 is a bottom view of a lid portion with a closed lid;

figure 5 is a cross section shown in figure 4;

figure 6 shows a detail of a cross section of the cover flange; and figure 7 stacked lid parts.

Detailed description of the embodiments

In figure 1, a container assembly 1 with a lid part 2 of the invention is shown. The container has a container part

3. The container part 3 can be made of cardboard, coated with a layer of synthetic coating known in the art to make it suitable for containing food or liquids. The container part can also be made of plastic or metal. Preferably, it is used to contain food or liquid. In one embodiment, the container part 3 may have a layer of synthetic coating on its inner surface, and a sealing membrane sealing sheet is coupled below the rim or edge of the container part 3, in one embodiment, the about 1-3 cm below the edge. The sealing sheet can be coupled to the inner surface of the container part 3, for example, by heat sealing. In this way, some space can be provided between the lid and the seal to store, for example, a ladle or measuring spoon.

The lid part 2 is further elaborated in figures 2 and 3, showing a 3D view of the lid part 2 with the lid open 4 from above (figure 2) and from below (figure 3). The lid part 2 comprises a connecting portion 5, a (living) hinge 9 and a lid 4. The lid 4 is thus pivotally connected to the connecting portion 5. The connecting portion 5 defines an access opening 6. In this embodiment, a first flange 7 borders with the access opening 6. The lid 4 is provided with a cover flange 8 that fits over the first flange 7 to close the access opening 6 and hermetically seal a container assembly 1. In this embodiment, the access opening is almost elliptical. Access opening 6 can also be rounded. Alternatively, it can be rectangular with rounded corners. Important in all three embodiments, however, is the fact that the cover flange 8 fits around the flange 7 to tightly seal the access opening 6.

The connecting portion 5 further comprises a wall 11 provided with said access opening 6. On the wall 11, meat elements 14 are provided. The use of these meats 14 is as explained in WO 2007 / 142,522 of this Applicant. These meats 14 provide part of the stacking means for stacking lid parts in production. In addition, these meats 14 provide part of a stacking means for stacking complete container assemblies, for example, e, stores. In this embodiment, the meat is provided on the connection portion 5. An advantage of this is that the lid 4 is not loaded. In this way, the quality of closure cannot be compromised. In addition, the height of the lid 4 in the closed position is equal or substantially equal to the height of the meat 14. Thus, when sets of containers are stacked, the loading of the containers will keep the lids closed by pressure, while preventing loads from other directions.

The connecting portion 5 is further provided with a circumferential ring 12, which can be called a U-shaped ring. It has a groove 13 for receiving an upper edge of the side wall of the container part 3. Fixing the connection portion 5 to the wall of the container can be effected by any means known in the art. In one embodiment, a hot melt adhesive is provided in the groove 13.

Figure 4 shows a bottom view of a lid part 2 with the lid closed. In this drawing, a cross section is indicated. The cross section is further shown in figure 5. This cross section shows more clearly how the cover flange 8 of the cover 4 closes on the flange 7 of the connection portion 5. In figure 7, this is shown in more detail.

Figure 5 also shows the rim of the connecting portion 12 more clearly. In the view of figure 5, reinforcement ribs 20 are indicated, which provide additional rigidity to the rim 12.

Figure 6 shows a detail of the cover flange 8 closing on the flange 7 of the container part 5. The cover flange 8 fits tightly around the flange 7 of the connection portion 5. In the situation of the figure

7, where the cover is closed over the connection part 5, the perimeter 23 at the edge 15 of the flange 7 is identical to the perimeter (inner) of the cover flange 8 in position 22. In position 16, the cover flange 8 is more thick, Flange 7 is fan-shaped. It is shaped so that its outer circumferential surface is adjusted against the inner circumferential surface of the cover flange 8. The cover flange 8 is made of a thermoplastic material. This allows for a certain degree of elasticity. Especially here, the cap flange has a thickness in view of the elasticity of the thermoplastic material used. The cover flange 8 fits somewhat elastically around the relatively rigid flange 7. In order to close the cover and make it easier to do it frequently, the lower end of the cover flange 8 has a beveled edge. This makes it easy to turn the edge of the cover flange 8 over the edge of the flange 7. When not fitted over the flange 7, the cover and, in particular, the cover flange 8 is dimensioned so that the smallest internal perimeter of the flange of cap is smaller than the smallest perimeter (circumscribed or outer) of flange 7. Preferably, the outer perimeter of flange 7 at edge 15 is greater than the inner perimeter of cap flange 8 at position 22. Thus, the cap 4 cannot jump spontaneously. In one embodiment, flange 7 is fan-shaped. The shape of the cover flange follows the shape or follows it when somewhat stretched. The cover flange 8 is stretched a little to fit elastically around the flange

7. This makes a hermetic seal possible. In practice, for example, in the embodiment shown in the drawings, the smallest diameter of flange 7 is 101.89mm, the largest diameter is 112.65mm. In one embodiment, the thermoplastic material is polypropylene (PP). In this case, the internal diameters of the cover are, for example, 101.36mm and 112.12mm. The external diameters are, for example, 104.0mm and 114.8mm. For this material, the thinnest part of the cover flange 8, D1, can be about 0.7-0.8mm and the thickest part D2 is about 1.1, 1.2mm. The height of the cover flange is about 3.9

4.5mm, and the height of a corresponding flange 7 is about 2.9-3.1mm. In practice, the diameter of the cover flange will be about 3-7% smaller than the corresponding diameter of the flange 7. In practice, the cover flange 8 will taper inward slightly, at an angle of about 2- 5 degrees. Due to its elasticity, the cover flange 8, when closed around the first flange 7, will stretch a little and the cover flange 8 will no longer taper, and will fit just around the first flange 7. In the drawing, the shapes cooperating tapered flanges of the cover flange and flange 7 pull the cover over the outer surface of the wall 11 of the connection portion, in order to provide an additional seal of the edge of the cover flange 8 and the wall surface 11

In order to provide the cover flange 8 with a certain amount of elasticity while, at the same time, providing a connection portion and in particular its flange 7 with sufficient stiffness, and allowing the cover part to be made cheaper and to a greater extent. quantity, in one embodiment, the lid part is made of thermoplastic material. In particular, it is made of polyethylene (PE) or polypropylene (PP). The material in one embodiment is sufficiently flexible and elastic to allow the cover flange 8 to be stretched around the flange 7. In this way, an airtight seal is possible.

In one embodiment, the volume of a container having the lid part is about 0.5-2 liters. This volume is determined by the depth, width and height of the container. In order to be able to provide a measuring shell having a length sufficient to reach the bottom of the container inside it, one of the dimensions of the diagonal cross section or the width or depth will preferably be of the same order of magnitude as the height of the container . In addition, it is preferred that the shell can be attached to the inside of the lid. In practice, the container can have a depth of about 9-13 cm, a width of about 1119

16cm and a height of about 10-18cm. The ladle or spoon will have a total length of about 9-11 cm. The access opening will therefore need to have a larger diameter of at least about 9-11 cm, depending on the total length of the ladle or spoon used. The area of the access opening 6 will have at least about 50% of the cross-sectional area of the container equipped with the lid part. An upper limit that can be reached will be around 85%. In the example shown, this number will be around 6070%. This will allow the cover to be sufficiently large, both in area and in the maximum diameter. At the same time, it will leave enough space to allow stacking meats 14 on the connection portion 5.

A large access opening is preferred for ease of entry with a shell. In addition, for hygiene reasons when offering a filled container to the public in a store, the shell can be provided attached to clips provided inside the lid or between the lid and the product seal which is additionally provided in the container below the lid ( that is, in the space provided between the cover and the product seal). In one embodiment, the lid has at least minimal node dimensions to fit the shell.

For ease of opening, the aforementioned cover 4 comprises an opening lip 21, coupled here to the rim of the cover flange 8. The lip and opening 21 is, at its edge, blocked by tamper evidence tape 22. This tape 22 has meats holding the edge of the opening lip 21. The tape 22 is coupled to the connecting portion 5 via thin bridges of material. These bridges must be thin enough to break if the opening lip 21 passes the ribbon meat 22.

Figure 7 shows two stacked lid parts 2, 2 '. The meats 14 on the connection portion 5 provide safe stacking to define the position of the lid parts in the production of container sets 11. In fact, as already indicated in figure 1, a first use of cams 14 is to provide a part of stacking means working in conjunction with complementary stacking provisions at the bottom of the container part, in particular at the bottom. This allows safe stacking of several containers on top of each other. In addition, since the stacking provisions on the lid part are provided on the connecting portion around the lid (in the closed position), stacking and stacking sets of containers provided with lid parts, closing the lid is not committed. In fact, in the embodiment shown, the stacking provisions on the lid part extend just above the lid, in order to further ensure the closure or in order not to compromise the closure.

A second use of stacking provisions on the lid part is possible if the positioning of these stacking provisions is adapted to the dimensions of the connecting portion. In this way, the effect and use of stacking lid parts described above are realized.

The positioning of the stacking provisions 14 on the connecting portion is such that the container assembly stacked on the lid portion cannot rotate. That is, it cannot rotate around its normal axis at the access opening. For this purpose, the cams 14 are provided, in this embodiment, at the corners of a (virtual) rectangle. The complementary stacking provisions at the bottom of the container part provide support on the sides of the rectangle against the stacking provisions 14 on the lid part 2.

In this embodiment, the stacking provisions on the container part are provided by a circumferential ring on the bottom of the container part, as shown in figure 1.

It will also be clear that the above description and drawings are included to illustrate some embodiments of the invention, and not to limit the scope of protection. From this disclosure, many other embodiments will be evident to someone skilled in the art, all being within the scope of protection and the essence of this invention and which will be obvious combinations of prior art and the disclosure of this patent.

Claims (15)

1. Lid part (2) for a container, said lid part made substantially of a thermoplastic material and comprising a connection portion (5) for connection to a rim of a container part and a lid (4) which is pivotally connected to said connection portion, said connection portion comprising a substantially round or substantially elliptical access opening (6) and a first circumferential flange (7) surrounding said access opening, said cover comprising a circumferential cover flange (8) extending towards said connection portion, the perimeters of said cover flange and said first flange mutually adapted to allow said cover to close in a sealed manner around said first connection flange, characterized by the fact that an area of the mentioned access opening is at least 50 cm ² and at least 50% of the connection portion area in which said connection portion comprises four stacking cams (14), said cams being arranged in positions around the first flange corresponding to the corners of a rectangle. 2. Cap part according to claim 1, characterized in that said first circumferential flange has a first perimeter close to said connection portion and a second perimeter close to the rim of said flange at an end of said flange away from said portion of connection, mentioned second perimeter of the first circumferential flange is larger than its first Petition 870180162789, of 12/13/2018, p. 6/39 2/4 perimeter, and said cap has a first inner perimeter close to said cap and a second inner perimeter close to the rim of said cap flange, said second inner perimeter of said cap is less than said first perimeter, said perimeters of said cover flange and said first flange mutually adapted to allow said cover to seal in said first flange of said connection portion with its cover flange surrounding said first flange. 3. Cap part according to claim 1 or 2, characterized in that said first flange limits said access opening. A lid part according to any one of claims 1 to 3, characterized in that said first flange fan-outwards from said access opening, thereby increasing a perimeter of said first flange. Cap part according to any one of claims 1 to 4, characterized in that the aforementioned first circumferential flange, circumferentially in its outer periphery, thicken near or in the aforementioned first flange rim. 6. Cover part according to any one of claims 1 to 5, characterized in that an area of the said access opening is between 60% and 70% of the area of the connection portion. Cap part according to any one of claims 1 to 6, characterized in that said cap flange is made of a thermoplastic material allowing its perimeters to expand when placing said cap on said first flange, and by the fact the first and second perimeters of the aforementioned cover flange, if the Petition 870180162789, of 12/13/2018, p. 7/39 3/4 said cover is not closing said opening, be smaller than the perimeters of said first flange. 8. Cap part according to any one of claims 1 to 7, characterized in that the thickness of said first flange, in view of its thermoplastic material, is selected to provide a rigid flange. Lid part according to any one of claims 1 to 8, characterized in that the mentioned lid part is made of a thermoplastic material selected from the group consisting of polyethylene (PE) and polypropylene (PP). 10. The lid part according to any one of claims 1 to 9, characterized in that the said lid is of a thermoplastic material having an elasticity in order to allow airtight sealing of said lid on said flange of said connecting portion, via said cap flange and said first flange. 11. Cover part according to any one of claims 1 to 10, characterized in that said connection portion comprises a wall (11) provided with said access opening, and said first flange extends from said wall, said wall and said lid, when closing said access opening, provides closure for a top of said container part. Cap portion according to any one of claims 1 to 11, characterized in that said connecting portion comprises a circumferential ring (12) having a circumferential groove (13) for receiving said ring of said container part. 13. Cover part according to claim 12, Petition 870180162789, of 12/13/2018, p. 8/39 4/4 characterized by the fact that a circumscribed area of the aforementioned circumferential ring is larger than the area of the access opening. Cap part according to any one of claims 1 to 13, characterized in that said first circumferential flange has a first perimeter close to said connection portion and a second perimeter close to the rim of said flange at one end of said flange away from said connecting portion, said second perimeter of the first circumferential flange is smaller than its first perimeter, and said cover has a first inner perimeter near said cover and a second inner perimeter near the rim of said cover flange, said second inner perimeter of said cap is greater than said first perimeter close to the rim of said cap flange, said perimeters of said cap flange and first flange mutually adapted to allow said cap to close in a sealed manner on the mentioned first flange of the mentioned the connecting portion with said first flange surrounding said cap flange. 15. Container characterized in that it comprises the lid part as defined in any of claims 1 to 14 and a container part, wherein said container part comprises a bottom and, connected to said bottom, a circumferential container wall ending in a ring to receive the mentioned cap part.