ES2936184A2 - Culinary item for microwave oven (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Culinary article for microwave oven. The present invention refers to a culinary item (1) used in a microwave oven, comprising a container (2) made of metallic material, which comprises a bottom (21) whose first contour (C1) is symmetrical and describes a circle or a substantially rectangular shape, and a side wall (22), and including a joining area (220) that has a curved shape, an intermediate area (221) and an upper area (222) ending in an edge (223) that describe a second contour (C2) symmetrically similar to that of said first contour (C1), characterized in that said container (2) is made of stainless steel, and in that said upper area (222) has a substantially curved shape oriented such that an outer surface (201) is concave in said upper zone (222);The outer surface (201) has a first area (2225) and a second area (2226), the ratio R/R' between the radii of curvature of these two areas being between 1.5 and 15, and preferably between 1.875 and 12.5. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Culinary item for microwave oven

Technical field of the invention

The present invention relates to the field of containers usable in microwave ovens, and refers more specifically to a culinary article comprising a stainless steel container intended to be used to heat food in a microwave oven.

Background art

Microwave ovens generate electromagnetic waves that agitate water molecules within food, causing a rapid and local rise in temperature. This process does not allow the use of all types of containers. Indeed, some plastics, polystyrene or terracotta cannot or are not suitable for heating food in microwave ovens.

Usually, the containers used in microwave ovens are made of glass or plastic. It is generally accepted that metal (especially stainless steel) containers or accessories that have one or more sharp edges cannot be used in microwave ovens. Said articles are known to those skilled in the art, such as those described in patent applications US2017202393 or EP313725. Thus, in the US patent application, it takes into account the shape requirements of a metal microwave container. These requirements result in very precise conditions on the final shape of the container (particularly rounded shapes). But nothing is said about a specific shape of the side wall of the container that allows a good circulation of waves and heat inside the box.

Exhibition of the invention

In order to comply with the above specifications, the applicant has developed a culinary article intended to be used in a microwave oven comprising a container made of metallic material (which can preferably be integrally molded), with an inner surface suitable for receiving food and a surface exterior, including the container:

- a bottom of a shape adapted to rest at least partially on a work surface and whose contour is symmetrical and describes a circle, or a substantially rectangular shape, and

- a continuous side wall comprising:

- a junction zone, or connection, rising from said bottom and presenting a curved shape oriented so that said inner surface is concave in said junction zone, - an intermediate zone rising from said junction zone, and

- an upper area that extends said intermediate area ending in an edge that describes a second contour C2 symmetrical in a similar way to that of said first contour C1, the culinary article according to the invention being characterized by the fact that the container is made of stainless steel, and

because:

- the upper zone has a substantially curved shape oriented so that the outer surface is concave at the level of the upper zone, and

in the upper area,

- the outer surface has a first area that has a first radius of curvature R and a second area that has a second radius of curvature R', the first area representing at least 10% of the second contour C2 and the progression being homogeneous and regular from R' to R between said second zone and said first zone, the first zone representing at least 10% of the second contour C2, and preferably between 10% and 20% of the second contour C2 when the shape is circular and preferably between 25% and 30% when the shape is rectangular, with the progression from R' to R between the second zone and the first zone being homogeneous and regular, and

the ratio of R/R' is between 1.5 and 15 and preferably between 1.875 and 12.5.

Therefore, the container of the culinary article according to the invention has a general shape having perfectly continuous flowing lines. In addition, the container according to the invention, which is metallic in nature and has rounded and continuous shapes, can be used both in a microwave oven and in a freezer.

On the other hand, a ratio R/R', from the first radius of curvature R to the second radius of curvature R', between 1.5 and 15, and preferably between 1.875 and 12.5, causes the side wall to have a widened neck. in the upper zone, which allows a good circulation of waves and heat inside the container.

When the first contour C1 describes a circle, in the joining area, the inner surface It can present in section the shape of a truncated torus of third radius r or, when the first contour C1 describes a substantially rectangular shape, the inner surface can have four lower rounded corners, each of which has the shape of a spherical cap of third radius r, with r between 10 mm and 50 mm.

The fact that the joining area is in the shape of a truncated torus (Circular Contour) or with four corners in the shape of a spherical cap (Rectangular Contour) makes it possible to avoid the presence of a sudden rupture of the profile between the side wall and the bottom of the container.

In the middle zone,

- the side wall can be a truncated cone of revolution whose height passes through the center O of the first contour C1 when the latter describes a circle, or

- the side wall can be a truncated pyramid comprising four inclined walls each of which rises from each of the lower rounded corners when the first contour C1 describes a substantially rectangular shape,

- forming any plane tangent to the truncated cone of revolution or each of the inclined walls at an angle a with respect to a flat support on which it is intended to place said bottom that is between 80 and 88 degrees of angle. At the level of the intermediate zone, the angle between 80 and 88 degrees of angle has the effect of allowing the evacuation of electrical charges outside the container; such a range of variation of the value of the angle a also makes it possible to optimize the stacking of boxes of the same format one inside the other and thus optimize costs and size (logistics, storage in the user space, etc.).

At the level of the upper zone, said second contour C2 can describe a substantially rectangular or circular shape.

In the case of a substantially rectangular shape, the outer surface may comprise two adjacent first upper rounded corners having the shape of a spherical cap of first radius R and defining a first upper side and two second upper rounded corners having the shape of a spherical cap of second radius R' and which are opposite said first upper rounded corners defining a second upper side opposite said first upper side.

In the upper zone, the second contour C2 can have a length L2 or a diameter D2 (depending on whether the second contour C2 is substantially rectangular or circular), which are such that L2 or D2 are at least equal to 1.3 xh, and preferably at least equal at 3 x h.

This also has the effect of preventing any accumulation of electrical charges within the container.

The side wall can have a height h from the bottom of between 30 and 150 mm

As stainless steels in the context of the present invention for producing the container of the culinary article according to the invention, ferritic or non-ferritic (especially austenitic) stainless steels can be used, depending on whether one wants to make a container that has deep or light drawing. .

Thus, for example, as non-ferritic (so-called austenitic) stainless steels, stainless steel INOX 304 according to the American AISI standard (composed of 18% Cr and 8% nickel) will preferably be used in the context of the present invention. , and corresponding to the AFNOR reference Z7CN18-09), allowing deep drawing.

Instead, as ferritic stainless steels, in the context of the present invention, stainless steel INOX 430 according to the American AISI standard (containing 18% Cr, and corresponding to the reference AFNOR Z8C17) will preferably be used. Said steel has the advantage of being less expensive, on the other hand, it has a low elongation capacity, which is a problem when it is desired to make tall containers, especially suitable for nesting.

In order to allow a ferritic stainless steel container to be drawn, it is preferable that the ratio between the height h and the value of the perimeter pC2 of the second contour C2 is between 5 and 12% and that r is equal to or greater than 20 mm.

According to a first embodiment of the culinary article according to the invention in which the first contour C1 and the second contour C2 each describe a substantially rectangular shape,

- in said junction area, said inner surface has four lower rounded corners having the shape of a spherical cap of third radius r, with r comprised between 5 mm and 50 mm,

- in said intermediate zone,

- said side wall is a truncated pyramid comprising four inclined walls, each of which rises from each of said lower rounded corners, - each of said inclined walls forming an angle a with respect to a flat support on which It is intended to place said background, which has between 80 and 88 degrees of angle.

According to a first variant of this first embodiment, the container may be a large container, with a substantially rectangular bottom (hereinafter, designated by the expression "large box").

According to a first example of such a variant, the container can be made of non-ferritic (austenitic) stainless steel and have a length L2 of 334 mm, a height h of 94 mm, a third radius r of 15 mm, a first radius R of 41 mm and a second radius R' of 5 mm.

According to a second example of such a variant, the container can be made of ferritic stainless steel and have a length L2 of 322 mm, a height h of 59 mm, a third radius r of 30 mm, a first radius R of 59 mm and a second radius R' of 5 mm. For such a variant, the perimeter pC2 of the second contour C2 is 89 cm, and the height h corresponds to 6.63% of the perimeter pC2 of the second contour C2.

According to a second variant of this first embodiment, the container may be a medium-sized container, with a substantially rectangular bottom (hereinafter, designated by the expression "medium box").

According to a first example of such a variant, the container can be made of non-ferritic (austenitic) stainless steel and have a length L2 of 157 mm, a height h of 80 mm, a third radius r of 10 mm, a first radius R of 28 mm and a second radius R' of 5 mm.

According to a second example of such a variant, the container can be made of ferritic stainless steel and have a length L2 of 180 mm, a height h of 60 mm, a third radius r of 25 mm, a first radius R of 21 mm and a second radius R' of 5 mm. For such a variant, the perimeter pC2 of the second contour C2 is 60 cm, and the height h corresponds to 10% of the perimeter pC2 of the second contour C2.

According to a third variant of this first embodiment, the container may be a flat (shallow) container, with a substantially rectangular bottom (hereinafter, designated by the expression "flat box")

According to a first example of such a variant, the container can be made of non-ferritic (austenitic) stainless steel and have a length L2 of 270 mm, a height h of 40 mm, a third radius r of 10 mm, a first radius R of 16 mm and a second radius R' of 5 mm. According to a second example of such a variant, the container can be made of ferritic stainless steel and have a length L of 270 mm, a height h of 40 mm, a third radius r of 25 mm, a first radius R of 15 mm and a second radius R' of 5 mm. For such a variant, the perimeter pC2 of the second contour C2 is 74 cm, and the height h corresponds to 5.4% of the perimeter pC2 of the second contour C2.

According to a second embodiment of the culinary article according to the invention, the first contour C1 and the second contour C2 each describe a circle and the joining area has the shape of a truncated torus (hereinafter referred to as "round box"),

- in said junction area, said inner surface has the shape of a truncated torus of third radius r,

- in said intermediate zone,

- said side wall is a truncated cone of revolution whose height passes through the center O of said first contour C1,

- any plane tangent to the truncated cone of revolution forming an angle a with respect to a flat support on which it is intended to place said bottom that is between 80 and 88 degrees of angle;

- in said upper area,

- at the level of said first zone, any plane tangent to said lateral wall can be common to the truncated torus of first radius R of said upper zone and to the truncated torus of third radius r of said junction zone,

- at the level of said second zone diametrically opposite to the first zone, any plane tangent to the side wall can be common to the truncated torus of second radius R' of the upper zone and to the truncated torus of third radius r of the joining zone.

According to a first variant of this second embodiment, the container can be made of ferritic (austenitic) stainless steel and have a diameter D2 of 213 mm, a height h of 65 mm, a third radius r of 47 mm, a first radius R of 30 mm and a second radius R' of 5 mm.

According to a second variant of this second embodiment, the container can be made of non-ferritic (austenitic) stainless steel and have a diameter D2 of 155 mm, a height h of 51 mm, a third radius r of 22 mm, a first radius R of 30 mm and one second radius R' of 5 mm. For such a variant, the perimeter pC2 of the second contour C2 is 74 cm, and the height h corresponds to 7.97% of the perimeter pC2 of the second contour C2.

The edge 223 that ends in the upper area 222 can be a rolled edge, that is to say an edge that closes at an angle of 90 degrees with respect to the wall of the container. Preferably, the rolling will not allow the section of the edge of the side wall to appear so as not to create a risk when passing through a microwave oven (risk of creating an electric arc).

Between said first two adjacent upper rounded corners, the width of the edge is greater, and for example equal to 20 mm.

The culinary article according to the invention may also comprise a lid, preferably made of plastic that can be placed in a microwave oven.

Brief description of the figures

Other advantages and characteristics of the present invention will result from the following description, given as a non-limiting example and made with reference to the attached figures and the examples according to the present invention:

[fig. 1]: Figure 1 is a schematic top view of a first embodiment of the culinary article according to the invention in which the first contour C1 and the second contour C2 each describe a substantially rectangular shape;

[fig. 2]: Figure 2 comprises two schematic views 2A and 2B in side perspective of another example of a culinary article according to the invention;

[fig. 3]: Figure 3 comprises two schematic sectional views 3A and 3B of a first variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "big box" type); these schematic views corresponding to two different examples that differ in the embeddability of each of the embodiments;

[fig. 4]: Figure 4 comprises two schematic sectional views 4A and 4B of a second variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "medium box"type); these schematic views corresponding to two different examples that differ essentially by the embeddability of each of the embodiments;

[fig. 5]: Figure 5 comprises two schematic sectional views 5A and 5B of a third variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "flat box" type); these schematic views corresponding to two different examples that differ in the embeddability of each of the embodiments;

[fig. 6]: Figure 6 comprises two schematic views 6A and 6B in section of a second embodiment of the culinary article according to the invention (of the "round box" type), these two schematic views corresponding to two different examples of this embodiment, as well as a third perspective schematic view 6C showing the first and second zones and the evolution of the value of the radii of curvature from R to R' in the upper zone of the container.

Detailed description of figures 1 to 6

In the description that will follow, identical, similar or analogous elements will be designated with the same numerical references.

In figures 1 and 2, the first embodiment of the culinary article 1 according to the invention is shown in which the first contour C1 and the second contour C2 each describe a substantially rectangular shape. The culinary article 1 comprises a container 2 made of deep-drawn stainless steel, with an inner surface 200 (visible in Figures 1 and 2) adapted to receive food and an outer surface 201 (visible in views 2A and 2B). The container 2 comprises a bottom 21 with a shape adapted to rest on a work surface (in this case a flat bottom) and whose first contour C1 has a substantially rectangular shape, as well as a continuous side wall 22 (visible in figure 2). .

The structure of the side wall 22 of the container 2 is particularly visible in Figure 3, but this also applies to the diagrams in Figures 1, 2, 4 and 5. Thus, Figure 3 shows in particular that the side wall side 22 comprises: a junction area 220 (visible in figure 3) rising from the bottom 21 and having a curved shape oriented so that the inner surface 200 is concave at the junction area 220: indeed , Figure 2 shows that the inner surface 200 has four lower rounded corners 2201, 2202, 2203, 2204 that are shaped like a spherical cap of third radius r, an intermediate zone 221 (visible in Figure 3) rising from the zone union 220: figure 2 shows in particular that, in this intermediate zone, the side wall 22 is a truncated pyramid including four inclined walls 2211, 2212, 2213, 2214 each of which rises from each of the lower rounded corners 2201, 2202, 2203 , 2204 and forms an angle a with respect to a flat support on which it is intended to place the bottom 21, which is between 80° and 88 degrees of angle; an upper area 222 (visible in FIG. 3) which extends the intermediate area 221 ending in an edge 223 (visible in particular in views 3B and 4A) describing a second rectangular symmetrical contour C2, the upper area 222 presenting a shape curve oriented so that the outer surface 201 is concave at the level of said upper zone 222: Figures 2 to 5 show in particular that the outer surface 201 includes two first adjacent upper rounded corners 2221, 2222 having the shape of a spherical cap of first radius R and defining a first upper side 2231, and two second upper rounded corners 2223, 2224 having the shape of a spherical cap of second radius R' and which are opposite the first upper rounded corners 2221, 2222 of first radius R'. radius R that define a second upper side 2232 (visible in Figure 2) opposite said first upper side 2231, R representing between two and ten times the value of R' so that the container 2 has a greater edge width in the side of the rounded corners of radius R (2221, 2222) than on the side of the rounded corners of radius R' (2223, 2224).

In this way, in this zone that extends between the rounded corners 2221 and 2222 of the first radius R, the first upper side 2231 of the edge is in the form of a lip that has the effect of facilitating the grip of the container 2. This lip also has the effect of forming this part of the upper edge into a neck that facilitates the pouring of the contents of the container such as dishes, and for example dishes in sauce. The width of the lip, considered globally in plan view, is preferably of the order of 20 mm.

View 2B shows that the outer surface 201 has a first area 2225 that has the shape of a truncated sphere of first radius R and a second area 2226) that has the shape of a truncated sphere of second radius R', representing the first area 2225 25% of the second contour C2 and the progression from R' to R being homogeneous and regular between the second zone 2226 and said first zone 222

Figure 3 illustrates more particularly a first variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "big box" type): according to the first example illustrated in view 3A, L=334 mm , h = 94mm, r = 15mm, R=41mm and R'=5mm; and according to the second example illustrated in view 3B, L=322 mm, h=59 mm, r=30 mm, R=17 mm and R'=5 mm.

Figure 4 more particularly illustrates a second variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "medium box" type): according to the first example illustrated in view 4A, L = 157 mm, h=80mm, r=10mm, R=28mm and R'=5mm; and according to the second example illustrated in view 4B, L=180 mm, h=60 mm, r=25 mm, R=21 mm and R'=5 mm.

Figure 5 more particularly illustrates a third variant of the first embodiment of the culinary article according to the invention represented in Figures 1 and 2 (of the "flat box" type): according to the first example illustrated in view 5A, L=270 mm, h=40mm, r=10mm, R=16mm and R'=5mm; and according to the second example illustrated in view 5B, L=270mm, h=40mm, r=25mm, R=15mm and R=5mm. For such a loosely drawn container, a non-ferritic stainless steel may be used.

The variants illustrated in views 3B, 4B and 5B are made of ferritic stainless steel.

In figure 6, the second embodiment of the culinary article 1 according to the invention is represented in which the first contour C1 and the second contour C2 of the container 2 each describe a circle so that the container 2 has the shape of a truncated sphere. (hereinafter referred to as "round box". The container 2 comprises a bottom 21 with a shape suitable for resting on a work surface (in this case a flat bottom) and whose first contour C1 is circular, as well as a side wall 22 which, in the same way as the first embodiment (as shown in Figures 1 to 5) includes three zones:

- 6 in the junction zone 220, the inner surface 200 presents in section the shape of a truncated sphere of third radius r,

- in the intermediate zone 221, the side wall 22 is a truncated cone of revolution 215 whose generatrix passes through the center O of said first contour C1 and any tangent plane to the truncated cone of revolution 215 forming an angle a with respect to a flat support on which said bottom 21 intended to be placed rests, having between 80 and 88 degrees of angle;

- in said upper area 222,

- at the level of said first zone 2225, any plane tangent to said side wall 22 is common to the truncated sphere of first radius R of said upper zone 222 and to the truncated sphere of third radius r of said joining zone 220 and

- at the level of said second zone 2226, any plane tangent to the side wall 22 is common to the truncated sphere of second radius R' of said upper zone 222 and to the truncated sphere of third radius r of said junction zone 220.

Views 3B, 4B, 5B and 6B show the presence of a weather strip located at a height corresponding to 2/3 of the height h from the bottom. This weather stripping, which stiffens the side wall, results from the stuffing of the containers.

A digital simulation of the electric field maps in containers according to the invention during their passage through a microwave oven was carried out.

For this, digital simulation tools and the finite element modeling software "Ansys Electronic Desktop version 18.2" from the company Ansys coupled to two calculation servers were used.

In order to introduce realistic data into the model, the data available in the bibliography have been taken into account to feed the model.

The modeling focused on three containers or boxes that could, in terms of geometry, fit into a microwave oven: a medium box, a round box, and a flat box.

At first, the containers were modeled without a load, that is, without containing any food inside.

These containers are then filled up to three quarters with water and then with a liquid whose dielectric properties are close to an average value of the products that are normally contained in said containers.

The results of this simulation show in particular that the fluid and rounded shape of the corners of each container allows a smooth circulation of the waves. They also show that the lip (which forms a flared neck) very wide (on the side of the first corners upper rounded 2221 and 2222) allows an easier evacuation of electrical charges. This enlarges the opening without necessarily changing the size and volume of the container.

Claims (16)

1. Culinary article (1), intended to be used in particular in a microwave oven, comprising a container (2) made of metallic material, said container (2) presenting an inner surface (200) suitable for receiving food and an outer surface (201), comprising said container (2): - a bottom (21) of a shape suitable for resting at least partially on a work surface and of which a first contour (C1) is symmetrical and describes a circle or a substantially rectangular shape, and - a continuous side wall (22), of height h from said bottom (21), and comprising: - a junction area (220) rising from said bottom (21) and having a curved shape oriented so that said inner surface (200) is concave in said junction area (220), - an intermediate area (221) rising from said junction area (220), and - an upper area (222) that extends said intermediate area (221) and ends in an edge (223) describing a second symmetrical contour (C2) similar in shape to said first contour (C1), characterized in that said container (2) is made of stainless steel, and because: - said upper area (222) has a substantially curved shape oriented so that said outer surface (201) is concave at the level of said upper area (222); - in said upper zone (222), - said outer surface (201) has a first zone (2225) having a first radius of curvature R and a second zone (2226) having a second radius of curvature R', said first zone (2225) representing at least 10 % of said second contour (C2) and the progression from the second radius of curvature R' to the first radius of curvature R, between said second zone (2226) and said first zone (2225), being homogeneous and regular; - the ratio R/R' between said second and first radii of curvature is between 1.5 and 15, and preferably between 1.875 and 12.5. A culinary article (1) according to claim 1, according to which said second contour (C2) describes a substantially rectangular shape, said outer surface (201) comprising two adjacent first upper rounded corners (2221, 2222) having the shape of a spherical cap with a first radius R and defining a first upper side (2231), and two second upper rounded corners (2223, 2224) having the shape of a spherical cap with a second radius R' and being opposite said first rounded corners tops (2221, 2222) defining a second top side (2232) opposite said first top side (2231). 3. Culinary article (1) according to any one of claims 1 and 2, according to which said second contour C2 has a length L2 or a diameter D2, according to which the second contour C2 is substantially rectangular or circular, which are such that L2 or D2 are greater than or equal to 1.3 x h, and preferably 3 x h. A culinary article (1) according to any one of claims 1 to 3, according to which R is between 15 and 50 mm and R' is between 4 mm and 8 mm. A culinary article (1) according to any one of claims 1 to 4, according to which said side wall (22) has a height h from said bottom (21) of between 30 and 150 mm. Culinary article (1) according to any one of claims 1 to 5, wherein, when said first contour (C1) and second contour (C2) each describe a substantially rectangular shape, - in said junction zone (220), said inner surface (200) includes four lower rounded corners (2201, 2202, 2203, 2204) that have the shape of a spherical cap of third radius r, with r between 5 and 50 mm, - in said intermediate zone (221), - said side wall (22) is a truncated pyramid comprising four inclined walls (2211,2212, 2213, 2214) each of which rises from each of said lower rounded corners (2201,2202, 2203, 2204) when said first contour (C1) describes a substantially rectangular shape, - each of said inclined walls (2211, 2212, 2213, 2214) forming an angle a with respect to a flat support on which it is intended to place said bottom (21), which is between 80 and 88 degrees of angle. 7. Culinary article (1) according to claim 6, according to which the container (2) is made of austenitic stainless steel, and has a length L2 of 334 mm, a height h of 94 mm, a first radius R of 41 mm and a second radius R' of 5 mm. 8. Culinary article (1) according to claim 6, according to which the container (2) is made of ferritic stainless steel, and has a length L2 of 322 mm, a height h of 59 mm, a first radius R of 17 mm and a second radius R' of 5 mm 9. Culinary article (1) according to claim 6, according to which the container (2) is made of austenitic stainless steel, and has a length L2 of 157 mm, a height h of 80 mm, a first radius R of 28 mm and a second radius R' of 5 mm. 10. Culinary article (1) according to claim 6, according to which the container (2) is made of ferritic stainless steel, and has a length L2 of 180 mm, a height h of 60 mm, a first radius R of 21 mm and a second radius R' of 5 mm. 11. Culinary article (1) according to claim 6, according to which the container (2) is made of austenitic stainless steel, has a length L2 of 270 mm, a height h of 40 mm, a first radius R of 16 mm and a second radius R' of 5 mm. 12. Culinary article (1) according to claim 4, according to which the container (2) is made of austenitic stainless steel and has a length L2 of 270 mm, a height h of 40 mm, a first radius R of 15 mm and a second radius R' of 5 mm. 13. Culinary article (1) according to any one of claims 1 to 5, wherein, when said first contour (C1) and second contour (C2) are circular, - in said junction area (220), said inner surface (200) has the shape of a truncated torus of third radius r, - in said intermediate zone (221), - said side wall (22) is a truncated cone of revolution (215) whose height passes through the center (O) of said first contour (C1), - any plane tangent to said truncated cone of revolution (215) forming an angle a with respect to a flat support on which it is intended to place said bottom (21), which has an angle of between 80 and 88 degrees; - in said upper area (222): - At the level of said first zone (2225), any plane tangent to said lateral wall (22) is common to a truncated torus of first radius R of said upper zone (222) and to a truncated torus of third radius r of said zone of junction (220), and- at the level of said second zone (2226), any plane tangent to said side wall (22) is common to a truncated torus of second radius R' of said upper zone (222) and a truncated torus of third radius r of said joining area (220). 14. Culinary article (1) according to claim 13, according to which the container (2) is made of ferritic stainless steel, having a diameter D2 of 213 mm, a height h of 65 mm, a third radius r of 47 mm, a first radius R of 30 mm and a second radius R' of 5 mm. 15. Culinary article (1) according to claim 13, according to which the container (2) is made of ferritic stainless steel, having a diameter D2 of 155 mm, a height h of 51 mm, a third radius r of 22 mm, a first radius R of 30 mm and a second radius R' of 5 mm. A culinary article according to claim 2, according to which, between said first two adjacent upper rounded corners (2221, 2222), the width of the edge (223) is equal to 20 mm.