EP2814741B1 - Flat container including an arcuate bottom - Google Patents

Description

The invention relates to the field of containers obtained by blow molding or stretch blow molding from a blank (for example a preform or an intermediate container) made of plastic material such as PET (polyethylene terephthalate).

The invention relates more particularly to flat containers, that is to say to the containers having in section a flattened shape, typically oval or rectangular. The document EP0130023A2 discloses a container according to the preamble of claim 1. This type of container is particularly suitable for certain applications (including cosmetics) in which the content has a high viscosity, a pressure on the container body promoting the flow of the contents.

But this type of container is not limited to cosmetic applications, and for ergonomic reasons, it is also used in the packaging of drinks, the flattened section offering indeed a better grip, as explained in international demand WO 2007/127789 (The Coca Cola Company) or its American counterpart US 2010/0000963 .

This advantage in terms of ergonomics is, however, accompanied by a mechanical disadvantage: the instability due to the flattening of the container which increases the risk of tilting in an axial plane parallel to the small width of the container.

The stability of the container is inversely proportional to its ease of handling. It is a compromise between these two constraints that the solution outlined in the aforementioned document, which proposes on the one hand to maintain the ratio W / D (where W is the large width of the container, and D its small width) between 1 , 2 and 1.8, and secondly to provide the bottom of the container rounded chamfers (sic) whose diameter is smaller in the small width of the container that in its great width.

In reality, this solution provides only a partial answer to the problem of instability which flat containers are affected. In practice, it is found that the natural instability (due to the flat shape) of such a container is often coupled with instability due to defects in shape on the bottom.

Indeed, when forming a flat container, it is more stretched in the direction of the width than in the direction of the small width. This variation of the stretching ratio can cause on the bottom flatness defects which it is desirable to overcome.

A first simple solution could be to increase the blowing pressure, but manufacturers face the need to control the energy consumption of machines, forcing the blowing pressure down.

A second simple solution could be to increase the blowing time (and therefore increase the cycle time) to promote a better impression of the bottom, but this solution also faces the procedural constraints, which aim to reduce the cycle time to increase production rates.

It remains therefore to optimize the shape of the bottom.

• bonne stabilité ;
• bon compromis entre ergonomie et stabilité ;
• bonne soufflabilité ;
• absence (ou quasi-absence) de défauts de planéité sur le fond.

The invention aims to propose a flat container capable of filling one or more (and preferably all) of the following objectives:

• good stability;
• good compromise between ergonomics and stability;
• good puffiness;
• absence (or near absence) of flatness defects on the bottom.

For this purpose, it is proposed, in the first place, a container according to claim 1.

Thus dimensioned, this container offers a better compromise between ergonomics and stability.

• l'extension transversale minimum A2 du plan de pose et l'extension transversale minimum B2 du corps sont telles que : $$\frac{\mathrm{A}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\ge \mathrm{0,90}$$
  
• l'extension transversale minimum A2 du plan de pose et l'extension transversale minimum B2 du corps sont telles que : $$\frac{\mathrm{A}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\cong \mathrm{0,95}$$
  
• le plan de pose présente, parallèlement à l'extension transversale maximum du plan de pose, une largeur L1 maximum et, parallèlement à l'extension transversale minimum du plan de pose , une largeur L2 minimum telles que : $$\frac{\mathrm{L}1}{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">L</figure-callout>}2}>1$$
  
• la largeur L1 maximum et la largeur L2 minimum du plan de pose sont telles que : $$1<\frac{\mathrm{L}1}{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">L</figure-callout>}2}<3$$
  
• la largeur L1 maximum et la largeur L2 minimum du plan de pose sont telles que : $$\frac{\mathrm{L}1}{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">L</figure-callout>}2}\cong 2$$
  
• la hauteur H1 minimum et la hauteur H2 maximum de la joue sont telles que : $$\mathrm{0,5}<\frac{\mathrm{H}1}{\mathrm{H}2}<1$$
  
• la hauteur H1 minimum et la hauteur H2 maximum de la joue sont telles que : $$\frac{\mathrm{H}1}{\mathrm{H}2}\cong \mathrm{0,95}$$
  
• l'extension transversale maximum A1 et l'extension transversale minimum du plan de pose sont telles que : $$\frac{\mathrm{A}1}{\mathrm{A}2}>\mathrm{1,5}$$
  
  et, de préférence : $$\frac{\mathrm{A}1}{\mathrm{A}2}>\mathrm{1,8}$$
  
• en tout point M d'un périmètre externe du plan de pose, la largeur L_M du plan de pose est telle que : $$\frac{1}{15}\le \frac{{\mathrm{L}}_{\mathrm{M}}}{{\mathrm{C}}_{\mathrm{M}}}\le \frac{1}{5}$$
  
  où C_M est la distance du point M à l'axe X principal du récipient.

Various characteristics may be provided, alone or in combination:

• the minimum transverse extension A2 of the laying plane and the minimum transverse extension B2 of the body are such that: $$\frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\ge 0.90$$
  
• the minimum transverse extension A2 of the laying plane and the minimum transverse extension B2 of the body are such that: $$\frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\cong 0.95$$
  
• the laying plane has, parallel to the maximum transverse extension of the laying plane, a maximum width L1 and, parallel to the minimum transverse extension of the laying plane, a minimum width L2 such that: $$\frac{\mathrm{The}1}{\mathrm{The}2}>1$$
  
• the maximum width L1 and the minimum width L2 of the laying plane are such that: $$1<\frac{\mathrm{The}1}{\mathrm{The}2}<3$$
  
• the maximum width L1 and the minimum width L2 of the laying plane are such that: $$\frac{\mathrm{The}1}{\mathrm{The}2}\cong 2$$
  
• the minimum height H1 and the maximum height H2 of the cheek are such that: $$0.5<\frac{\mathrm{H}1}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}<1$$
  
• the minimum height H1 and the maximum height H2 of the cheek are such that: $$\frac{\mathrm{H}1}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}\cong 0.95$$
  
• the maximum transverse extension A1 and the minimum transverse extension of the laying plane are such that: $$\frac{\mathrm{AT}1}{\mathrm{AT}2}>1.5$$
  
  and, preferably: $$\frac{\mathrm{AT}1}{\mathrm{AT}2}>1.8$$
  
• at any point M of an external perimeter of the laying plane, the width L _M of the laying plane is such that: $$\frac{1}{15}\le \frac{{\mathrm{The}}_{\mathrm{M}}}{{\mathrm{VS}}_{\mathrm{M}}}\le \frac{1}{5}$$
  
  where C _M is the distance from the point M to the main axis X of the container.

• la figure 1 est une vue en perspective par-dessous d'un récipient en matière plastique, détaillant en encart, à échelle agrandie, le fond du récipient ;
• la figure 2 est une vue de dessous du fond du récipient de la figure 1 ;
• la figure 3 est une vue de détail en section du récipient de la figure 2, selon le plan de coupe III-III ;
• la figure 4 est une vue de détail en section du récipient de la figure 3, selon le plan de coupe IV-IV ;
• la figure 5 est une vue similaire à la figure 4, selon une variante de réalisation.

Other objects and advantages of the invention will emerge in the light of the description of a preferred embodiment, given below with reference to the appended drawings in which:

• the figure 1 is a perspective view from below of a plastic container, detailing in an insert, on an enlarged scale, the bottom of the container;
• the figure 2 is a bottom view of the bottom of the container from the figure 1 ;
• the figure 3 is a detail view in section of the container of the figure 2 according to section plane III-III;
• the figure 4 is a detail view in section of the container of the figure 3 according to section plane IV-IV;
• the figure 5 is a view similar to the figure 4 , according to an alternative embodiment.

On the figure 1 is shown a container 1 formed by stretching blow molding within a mold in the cavity of the container 1, a plastic preform such as PET (polyethylene terephthalate).

The container 1 comprises a body 2 which extends along a main axis X and extends, on a lower side, by a bottom 3, and, on an upper side, opposite the bottom 3, by a shoulder 4 itself. even extended by a neck 5 defining a drinking.

The body 2 has in section a flattened shape, in this case substantially oval. This shape extends to the bottom 3, whose contour is substantially the same as the body 2 in section.

At the junction between the body 2, at the lower end thereof, and the bottom 3, the container 1 has an external connection fillet 6 having a low radius radius arc profile (less than or equal to 2 mm). ).

The bottom 3 comprises a peripheral seat 7 which defines a plane 8 of continuous laying, substantially perpendicular to the main axis X of the container 1, and by which the latter can lie flat on a flat surface (in particular the upper surface of a table or conveyor belt, within a handling machine on a container production line).

The laying plane 8 is delimited transversely outwards (that is to say opposite to the axis X of the container 1 ) by an external perimeter 9 defined internally by the fillet 6.

There is a transverse extension of the laying plane 8 , measured perpendicularly to the main axis X of the container 1 at the outer perimeter 9 . The laying plane 8 having an oval contour, A is not constant, and has a maximum, called large dimension and denoted A1 and a minimum, called small dimension and denoted A2, whose ratio is strictly greater than 1: $$\frac{\mathrm{AT}1}{\mathrm{AT}2}>1$$

More specific examples of this report will be provided below.

B is also noted a transverse extension (or width) of the body 2, measured perpendicular to the main axis X of the container 1, near the bottom 3, that is to say at a distance from the lower laying plane 8 or equal to one fifth of the total height of the body 2. The body 2 having in cross section an oval contour like the bottom 3, B is not constant, and has a maximum B1, called the large dimension of the body 2 and a minimum B2, called small dimension of the body 2, whose ratio is strictly greater than 1: $$\frac{\mathrm{B}1}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}>1$$

The seat 7 comprises an inner annular cheek 10 that extends axially inwardly of the container 1 in the extension of the laying plane 8 , substantially perpendicular to it. The laying plane 8 is connected to the cheek 10 by an internal fillet 11 having a low-radius (less than or equal to approximately 2 mm) arcuate circle profile, or a medium-radius (approximately 2 mm to 5 mm) profile. .

The laying plane 8 is delimited transversely inwards (that is to say in the direction of the axis X of the container 1 ) by an internal perimeter 12 defined externally by the internal fillet 11 .

The bottom 3 further comprises a concave arch 13 , concavity facing outwardly of the container 1. This arch 13 extends from the seat 7, in the extension of the cheek 10, to a central zone of the bottom 3 defining a pin 14 which extends axially projecting inwardly of the container 1.

• H une hauteur de la joue 10 (confondue avec une hauteur interne de l'assise 7), mesurée axialement entre le plan 8 de pose et la jonction de la joue 10 avec la voûte 13 ;
• L une largeur du plan 8 de pose (confondue avec une largeur de l'assise 7), mesurée radialement entre le périmètre 12 interne et le périmètre 9 externe.

We notice :

• H a height of the cheek 10 (coincides with an internal height of the seat 7 ), measured axially between the laying plane 8 and the junction of the cheek 10 with the roof 13 ;
• L a width of the laying plane 8 (coincides with a width of the seat 7 ), measured radially between the inner perimeter 12 and the outer perimeter 9 .

• d'une part, la hauteur H de la joue 10 et la largeur L du plan 8 de pose sont tels que : $$\mathrm{0,5}\le \frac{\mathrm{L}}{\mathrm{H}}\le \mathrm{2,5}$$
  
• d'autre part, l'extension A transversale du plan 8 de pose et l'extension B transversale du corps 2 au voisinage du fond 3 sont telles que : $$\frac{\mathrm{A}}{\mathrm{B}}\ge \mathrm{0,85}$$
  

The bottom 3 is dimensioned as follows:

• on the one hand, the height H of the cheek 10 and the width L of the laying plane 8 are such that: $$0.5\le \frac{\mathrm{The}}{\mathrm{H}}\le 2.5$$
  
• on the other hand, the transverse extension A of the laying plane 8 and the transverse extension B of the body 2 in the vicinity of the bottom 3 are such that: $$\frac{\mathrm{AT}}{\mathrm{B}}\ge 0.85$$
  

This dimensioning significantly increases the stability of the container 1.

The A1 / B1 and A2 / B2 ratios can be dimensioned separately; they can be substantially identical: $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}\cong \frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}$$

et par exemple : $$\frac{\mathrm{A}2}{\mathrm{B}2}\cong \mathrm{0,95}$$

According to a preferred embodiment, the ratio A2 / B2 is greater than or equal to 0.90, and for example substantially equal to 0.95, as illustrated in FIG. figure 3 : $$\frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\ge 0.90$$

and for example: $$\frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}\cong 0.95$$

This dimensioning, which moves the outer perimeter 9 of the laying plane 8 outwards, that is to say opposite the axis X, gives the container 1 a substantially cylindrical shape in the vicinity of the bottom 3. This results in an increase in the stability of the container 1 in the plane of the small dimension A2.

et par exemple : $$\frac{\mathrm{A}1}{\mathrm{B}1}\cong \mathrm{0,95}$$

The ratio A1 / B1 may also be greater than or equal to 0.90, and for example substantially equal to 0.95, as illustrated in FIG. figure 4 : $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}\ge 0.90$$

and for example: $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}\cong 0.95$$

As a variant, the ratios A1 / B1 may be different, the ratio A1 / B1 being preferably lower than the ratio A2 / B2: $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}<\frac{\mathrm{AT}2}{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}2}$$

et par exemple : $$\frac{\mathrm{A}1}{\mathrm{B}1}\cong \mathrm{0,89}$$

Thus, the ratio A2 / B2 being maintained greater than or equal to 0.90, and for example approximately equal to 0.95 as illustrated in FIG. figure 3 , the ratio A1 / B1 is then less than 0.90, and for example substantially equal to 0.89, as illustrated in FIG. figure 5 : $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}<0.90$$

and for example: $$\frac{\mathrm{AT}1}{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="imgf0002.png"\; state="\{\{state\}\}">B</figure-callout>}1}\cong 0.89$$

This makes it possible to maintain a good stability of the container 1 in the plane of the small dimension A2 (A2 / B2 ratio high), while maintaining a good puffability of the container 1 (A1 / B1 relatively lower ratio) in the plane of the large dimension A1, where stretching is more difficult but where the stability of the container 1 is naturally better.

According to a preferred embodiment, illustrated on the figures 2 , 3 and 4 the width L of the laying plane 8 is not constant along its outer perimeter 9 , but has a maximum noted L1, measured parallel to the large dimension A1, and a minimum, noted L2, measured parallel to the small dimension A2, whose ratio is strictly greater than 1: $$\frac{\mathrm{The}1}{\mathrm{The}2}>1$$

In other words, the laying plane 8 is wider parallel to the large dimension A1 than parallel to the small dimension A2. This greater relative width of the laying plane 8 in the larger dimension contributes to a good blowing of the bottom 3 in this direction, minimizing the risk of occurrence of distortions (or flatness defects) on the laying plane 8 .

In addition, the narrowness of the laying plane 8 in the small dimension gives it a quasi-linear character which reduces the risk of hyperstatism of the seat 7 and therefore increases the stability of the container 1.

Preferably, the ratio L1 / L2 is between 1 and 3: $$1<\frac{\mathrm{The}1}{\mathrm{The}2}<3$$

According to an embodiment illustrated on the figure 1 , this ratio is equal to 2 approximately: $$\frac{{\mathrm{The}}_1}{{\mathrm{The}}_2}\cong 2$$

Moreover, according to an embodiment according to the invention illustrated on the Figures 3 and 4 , the height H of the cheek 10 is not constant along the outer perimeter 9 of the laying plane 8 , but has a minimum, denoted H1, measured parallel to the large dimension A1 of the laying plane 8 , and a maximum, noted H2, measured parallel to the small dimension A2 of the laying plane 8 , the ratio of which is strictly less than 1: $$\frac{\mathrm{H}1}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}<1$$

Preferably, the ratio H1 / H2 is between 0.5 and 1: $$0.5<\frac{\mathrm{H}1}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}<1$$

According to a particular embodiment, illustrated on the Figures 3 and 4 this ratio is about 0.95: $$\frac{\mathrm{H}1}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}\cong 0.95$$

• à une meilleure soufflabilité du fond 3 dans le plan de la grande dimension A1, en minimisant la quantité de matière nécessitant un étirage axial ;
• à une meilleure rigidité de la voûte 13, grâce à la variation de hauteur de son périmètre externe (à sa jonction avec la joue 10) ;
• à une plus grande rigidité de l'assise 7 parallèlement à la petite dimension A2, au bénéfice de sa stabilité dans cette direction.

Thus, the cheek 10 is higher in the plane of the small dimension A2 than in that of the large dimension A1. This characteristic contributes in particular:

• a better blowing of the bottom 3 in the plane of the large dimension A1, minimizing the amount of material requiring axial stretching;
• a better rigidity of the vault 13, thanks to the variation in height of its outer perimeter (at its junction with the cheek 10 );
• to a greater rigidity of the seat 7 parallel to the small dimension A2, to the benefit of its stability in this direction.

It is thus possible, without compromising the stability, to flatten the container 1 beyond a ratio A1 / A2 (or B1 / B2) greater than 1.5, to the benefit of ergonomics. Preferably, the ratio A1 / A2 (or B1 / B2) is strictly greater than 1.8: $$\frac{\mathrm{AT}1}{\mathrm{AT}2}>1.8$$

Thus, according to a particular embodiment, illustrated in particular on the figure 2 the A1 / A2 ratio is about 1.9: $$\frac{\mathrm{AT}1}{\mathrm{AT}2}\cong 1.9$$

The variations, mentioned above, of the width L of the laying plane 8 and / or the height H of the cheek 10 can be expressed by a variation of the ratio L / H along the perimeter 9, preferably with : $$\frac{\mathrm{The}2}{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}2}<\frac{\mathrm{The}1}{\mathrm{<figure-callout\; id="1"\; label="H"\; filenames="imgf0002.png"\; state="\{\{state\}\}">H</figure-callout>}1}$$

• à hauteur H constante (H1 = H2), le plan 8 de pose est plus large dans la grande dimension (L1 > L2) ;
• à largeur L du plan 8 de pose constante (L1 = L2), la joue 10 est plus haute dans la petite dimension (H2 > H1).

This inequality reflects the fact that:

• at a constant height H (H1 = H2), the laying plane 8 is wider in the large dimension (L1>L2);
• at a width L of the plane 8 of constant laying (L1 = L2), the cheek 10 is higher in the small dimension (H2> H1).

It is also possible to dimension, at any point M of the outer perimeter 9 of the laying plane 8 , the width of the laying plane 8 , denoted by L _M , as a function of the distance, denoted C _M , from the point M to the axis X of the container 1, preferably with: $$\frac{1}{15}\le \frac{{\mathrm{The}}_{\mathrm{M}}}{{\mathrm{VS}}_{\mathrm{M}}}\le \frac{1}{5}$$

Thus, the width of the laying plane 8 at all points remains low compared to the distance to the axis X of the container 1. This ensures a more homogeneous formation of the seat 7 during the blowing of the container 1, the material being distributed more uniformly on the periphery of the laying plane 8 . This results in better blowing of the container 1 and a better stability thereof.

According to a preferred embodiment, the bottom 3 of the container 1 is formed by a stretch-blow molding process comprising a boxing operation, within a mold provided with a lateral wall defining an impression corresponding to the body 2 of the container 1 and a mold base relative to the wall so as to cause an overstretching of the base 3, conducive to a good rigidity and a good impression thereof.

Claims (11)

1. Container (1) obtained by blow-moulding or stretch-blow-moulding a plastic preform, provided with a flattened body (2) which extends along a main axis X and which is extended by a bottom (3) at a lower end thereof, the body (2) having a substantially oval shape which extends all the way down to the bottom (3), the bottom (3) comprising:

   a. a peripheral seating (7) defining:

   i. a continuous seating plane (8), substantially perpendicular to the main axis X of the container (1), the seating plane (8) being delimited transversely towards the outside, away from the main axis X of the container (1), by an external perimeter (9), the seating plane (8) being delimited transversely towards the inside, in the direction of the main axis X of the container (1) by an internal perimeter (12), the seating plane (8) having an oval contour, the transverse extension A of the seating plane (8), measured perpendicular to the main axis X of the container (1) at the level of the external perimeter (9) having a maximum A1 and a minimum A2 which are such that A1 is strictly greater than A2, and

   ii.an internal annular flange (10) which extends axially towards the inside of the container (1) in the continuation of the seating plane (8), substantially perpendicular with respect to the latter;

   b. a concave arch (13) which extends from the seating (7), in the continuation of the flange (10), towards a central zone (14);

   characterized in that:

   - the height H of the flange (10), measured axially between the seating plane (8) and the junction between the flange (10) and the arch (13), and the width L of the seating plane (8), measured radially between the internal perimeter (12) and the external perimeter (9) are such that: $$0.5\le \frac{\mathrm{L}}{\mathrm{H}}\le 2.5$$

   

   - the transverse extension A of the seating plane (8) and the transverse extension B of the body (2), measured perpendicular to the main axis X of the container (1) at a distance away from the seating plane (8) that is less than or equal to one fifth of the total height of the body (2), are such that: $$\frac{\mathrm{A}}{\mathrm{B}}\ge 0.85$$

   

   - the height H of the flange (10) has a minimum H1, measured parallel to the maximum transverse extension A1 of the seating plane (8), and has a minimum H2 measured parallel to the minimum transverse extension of the seating plane (8), the ratio between which is strictly less than 1, namely: $$\frac{\mathrm{H}1}{\mathrm{H}2}<1$$

   
2. Container (1) according to Claim 1, characterized in that the minimum transverse extension A2 of the seating plane (8) and the minimum transverse extension B2 of the body (2) are such that: $$\frac{\mathrm{A}2}{\mathrm{B}2}\ge 0.90$$

   
3. Container (1) according to Claim 2, characterized in that the minimum transverse extension A2 of the seating plane (8) and the minimum transverse extension B2 of the body (2) are such that: $$\frac{\mathrm{A}2}{\mathrm{B}2}\cong 0.95$$

   
4. Container (1) according to one of the preceding claims, characterized in that the seating plane (8) has, parallel to the maximum transverse extension A1 of the seating plane (8), a maximum width L1 and, parallel to the minimum transverse extension A2 of the seating plane (8), a minimum width L2 such that: $$\frac{\mathrm{L}1}{\mathrm{L}2}>1$$

   
5. Container (1) according to Claim 4, characterized in that the maximum width L1 and the minimum width L2 of the seating plane (8) are such that: $$1<\frac{\mathrm{L}1}{\mathrm{L}2}<3$$

   
6. Container (1) according to Claim 5, characterized in that the maximum width L1 and the minimum width L2 of the seating plane (8) are such that: $$\frac{\mathrm{L}1}{\mathrm{L}2}\cong 2$$

   
7. Container (1) according to any one of Claims 1 to 6, characterized in that the minimum height H1 and the maximum height H2 of the flange (10) are such that: $$0.5<\frac{\mathrm{H}1}{\mathrm{H}2}<1$$

   
8. Container (1) according to Claim 7, characterized in that the minimum height H1 and the maximum height H2 of the flange (10) are such that: $$\frac{{\mathrm{H}}_1}{{\mathrm{H}}_2}\cong 0.95$$

   
9. Container (1) according to one of the preceding claims, characterized in that the maximum transverse extension A1 and minimum transverse extension A2 of the seating plane (8) are such that: $$\frac{\mathrm{A}1}{\mathrm{A}2}>1.5$$

   
10. Container (1) according to Claim 10, characterized in that the maximum transverse extension A1 and the minimum transverse extension A2 of the seating plane (8) are such that: $$\frac{\mathrm{A}1}{\mathrm{A}2}>1.8$$

    
11. Container (1) according to one of the preceding claims, characterized in that, at any point M on an external perimeter (9) of the seating plane (8), the width L_M of the seating plane (8) is such that: $$\frac{1}{15}\le \frac{{\mathrm{L}}_{\mathrm{M}}}{{\mathrm{C}}_{\mathrm{M}}}\le \frac{1}{5}$$

    

    where C_M is the distance from the point M to the main axis X of the container (1).

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