EP3972913A1

EP3972913A1 - Container, the body of which has a gripping handle formed by a single boxing operation

Info

Publication number: EP3972913A1
Application number: EP20724857.6A
Authority: EP
Inventors: Mikael Derrien
Original assignee: Sidel Participations SAS
Current assignee: Sidel Participations SAS
Priority date: 2019-05-20
Filing date: 2020-05-14
Publication date: 2022-03-30
Anticipated expiration: 2040-05-14
Also published as: FR3096358B1; WO2020234125A1; US20220242616A1; FR3096358A1; EP3972913B1

Abstract

The invention concerns a container (1) made from plastic material comprising a body (10) extending along a central axis (C) between an opening (11) and a bottom (12), the body (10) having a boxed gripping indentation (2) extending parallel to the central axis (C) over a predetermined height (H), the boxed gripping indentation (2) being the only boxed indentation on the body (10) over the predetermined height (H), and having a median line (20) of maximum indentation, the median line (20) of maximum indentation lying in a diametral plane (P).

Description

DESCRIPTION

TITLE: CONTAINER WHOSE BODY PRESENTS A GRIP HANDLE SHAPED BY A SINGLE BOXING.

The field of the invention is that of the design and manufacture of plastic containers.

More specifically, the invention relates to containers obtained by blow molding or stretch blow molding from blanks (preforms, or intermediate containers having undergone one or more prior blowing operations) made of plastic.

The manufacture by blow molding of a container comprises a step of introducing, into a mold in the cavity of the container, a blank previously heated to a temperature above the glass transition temperature of the material constituting the preform (such as than PET), and a step of injecting a fluid (such as air) under pressure into the blank. Stretching by means of a sliding rod can complete the blowing.

A container thus obtained has a shape defined by a body extending between a bottom and an opening.

The gripping of such containers may be more or less easy depending on the shape and volume of the container, as well as the size of the hands of the person who wishes to take hold of the container.

To facilitate the gripping of the container, it is known to produce one or more gripping handles directly on the body of the container.

In this case, the handle is made on the body of the container, during the formation of the latter. To this end, the mold into which the container is blown has inserts, called boxing inserts of a handle, which are movable through the walls of the mold.

The method of manufacturing a container with a gripping handle comprises a step of boxing a handle using the inserts. Boxing consists of pushing a zone of material towards the inside of the container, so as to form a handle in the form of a hollow on the wall. The handle is formed by bringing two portions of a wall of the container together during its formation under the action of the boxing inserts. The boxing inserts thus deform the still softened plastic. The boxing allows the production of a recess having a significant depth on the wall of the body. The depth of this recess cannot be reached by simply blowing the container into its mold.

It is known from the prior art containers comprising a boxed grip handle, such as those described in the patent document published under the number US10086969B2. The containers described in this document include a handle formed by two boxed recesses presented by the body, facing each other, and thus bringing two opposite portions of the wall of the container body together. The boxed handle makes it easier for a person to grip the container, by inserting their thumb into one of the boxed recesses, wrapping their hand around the grip, and inserting their other fingers into the other boxed recess. The user can thus grab the handle to lift the container.

In the field of the invention, it is also known the patent document published under the number EP3112280A1. This document describes a container with a large capacity and provided with a handle. The handle is formed by two recesses boxed on the body, facing each other and located on one side of the container. The handle is thus eccentric on the container to allow a person to insert their fingers into the boxed recesses to grip the container. The recesses are symmetrically boxed to allow gripping of the bottle by a right hand or a left hand.

The handles described in these documents simplify the gripping of the containers. This type of handle design nevertheless has several drawbacks.

Indeed, the production of such a handle leads to overconsumption of plastic material for the formation of the container. More specifically, compared to forming a container without boxing, making boxing requires a larger amount of plastic to allow good deformation of the softened plastic material.

This results in an increase, although small, in the mass of the container, which is undesirable and clearly contrary to current trends in material savings. For certain applications where the cost of the packaging is predominant over the total cost of the product, this increase in mass proves to be problematic. In addition, this double boxing entails constraints for the design of the mold used to form the container, and for the vertical positioning of the boxing inserts relative to the mold.

More precisely, during the forming of the container, a compensation

Pneumatic blow pressure is implemented. The blowing pressure corresponds to the air injected into a preform placed in the mold to produce the container. This blowing pressure tends to separate two parts of the mold pressed against each other to form the mold. Pneumatic compensation consists in injecting air into a chamber between one of the parts of the mold and its support to counteract the blowing pressure. The chamber is delimited between the part of the mold and its support by a compensation seal. The seal is arranged so that the projected area of the compensation chamber is at least equal to that of the container taken in a plane parallel to the longitudinal axis of the container. For reasons of production cost in particular, the compensation zone, which was personalized in the past in the applicant's machines, is now standardized and the compensation chamber has a position and dimensions which are the same regardless of the surface. projected from the bottle. For reasons related to the design of the mold of its support, the height of the chamber is generally less than that of the container (the height is the dimension taken along the longitudinal axis of the container) and the width of the chamber is greater for that the projected area of the chamber is at least equal to that of the container. As a result, the bottom of the container, its neck and part of the shoulder face the outside of the clearing house.

In this context, if double boxing must be carried out, then the boxing insert fitted to the compensated mold part must move within the perimeter defined by the compensation joint. By way of example, in one embodiment of the Applicant, the boxing insert passing through the compensated mold part must have a vertical positioning such that the axis of the gripping handle produced cannot be positioned less than 97mm from the container neck.

Finally, such a handle formed by two recesses boxed on the body is not optimal for bottles of smaller diameter. Indeed, the handle is ultimately not very ergonomic. This results from the fact that the rear of the grip and the grip developed are necessarily reduced. The object of the invention is in particular to overcome the drawbacks of the prior art.

More specifically, the aim of the invention is to provide a container having a gripping handle, the design of which limits the

overconsumption of plastic material during the manufacture of the container, in particular compared to containers according to the prior art having a gripping handle formed by a double boxing.

The invention also aims to provide such a container which can be grasped equally and just as easily by the right hand or the left hand of a consumer.

These objectives, as well as others which will appear subsequently, are achieved by virtue of the invention which relates to a plastic container comprising a body extending along a central axis between an opening and a bottom, the body having a boxed gripping recess extending parallel to the central axis over a predetermined height H, characterized in that the boxed gripping recess is the only boxed recess on the body over the predetermined height, and has:

- a median line of maximum sag;

- a right side border and a left side border framing the center line of maximum sag;

the median line of maximum draft falling in a diametrical plane equidistant from the right side border and the left side border.

Thanks to the invention, the container has a gripping handle formed by the very shape of the body over its predetermined height H. In fact, over this predetermined height H, the body has a single boxed grip indentation making it possible to improve gripping the body of the container.

According to the principle of the invention, the gripping handle makes it possible to “pinch” the container in order to grip it. The boxed grip indentation extends over the predetermined height and thus provides a housing in which at least one of the fingers of one hand (for example one or more of the fingers except the thumb or, on the contrary, only the thumb) can be inserted. The hand can then close on the body of the container so that the thumb comes into opposition with respect to the body of the container, vis-à-vis the other finger or fingers. The clamp as well formed by the hand allows an effective grip of the container, for a right-handed or a left-handed, using the single boxed recess.

This grip is particularly ergonomic on containers with a small diameter (less than 100 mm).

As a result, there is no other boxed grip indentation on the predetermined height H apart from the first and only boxed grip indentation. Thus, the formation of the container only results in a slight overconsumption of plastic material for the formation of further boxed gripping recesses. A container according to the invention can thus be made lighter compared to a container having a gripping handle formed by a double boxing.

In addition, the realization of a single boxing to form the gripping handle offers greater flexibility in the design of the mold for the container on the one hand, and increased possibilities in the design of the packaging since the positioning range of the mobile insert is larger, on the other hand. This results from the fact that the boxing insert making the boxed gripping indentation can be movable through the part of the mold which is not compensated. Thus, the boxing insert passing through the non-compensated mold part may have a vertical positioning such that the gripping handle produced may be located, relative to the container, at a height greater than that which is permitted for containers with a handle. gripping formed by double boxing, with a pneumatically compensated mold. If we compare with the example mentioned above in which the gripping handle could not have an area located less than 97mm from the neck of the blank, the invention makes it possible to drastically reduce this distance: the boxed grip indentation can be much closer to the neck of the container.

It can also be noted that the formation of a gripping handle using a single boxing, and not two boxes, consumes less energy because there is only one insert of boxing to set in motion. In addition, this solution, insofar as it requires only one insert in a mold (preferably the uncompensated half-mold), is less expensive than those using double boxing which, in turn, require two inserts per mold. (one insert in each half-mold). According to a preferred characteristic, at least one deepest point of the median line of maximum depression is located 15 mm or less from the central axis C.

The boxed gripping indentation then has a sufficiently large depth for optimal insertion of the fingers of one hand, whatever the format of the bottle, and to allow the production of a clamp using one hand on the container. .

The median line of maximum indentation describes the profile of the boxed indentation in the diametral plane. The deepest point (s) corresponds to the point along this center line of maximum sag which is closest to the central axis C or which exceeds the central axis C in the diametral plane the most, with respect to at the other points constituting the median line of maximum draft. Thus, if the center line of maximum sag has at its maximum depth a cross section parallel to the central axis C, then the points constituting this cross section are the deepest points of the center line of maximum sag.

Advantageously, the deepest point or points are located 5 mm or more from the central axis C.

In this advantageous manner, the creation of the boxed gripping indentation during the formation of the container by stretch-blow molding does not require an unconventional adjustment of the stroke of the extension rod serving to stretch and hold the container. More specifically, during blowing, the extension rod extends inside the preform along the central axis C to ensure that an amorphous point of the preform is well maintained at the bottom of the mold. This rod

elongation thus occupies a space centered on the central axis C inside the container during its formation. Consequently, the position 5 millimeters or more from the central axis C of the deepest point (s) avoids contact between the boxed recess and the extension rod. There is thus no need to reassemble the extension rod early to allow boxing of the boxed gripping indentation that would extend opposite the stroke of the extension rod.

Advantageously, the body has a first developed and a second developed on either side of the diametral plane P of the body, between said deepest point and a point diametrically opposed to said deepest point, the first developed and the second developed. each being 100 to 160 millimeters. The container gripping handle is thus particularly ergonomic.

According to a preferred design, the body is symmetrical with respect to the diametral plane over the predetermined height H.

Thanks to this design, the container can be gripped with the right hand or the left hand, indifferently and just as easily.

According to a preferred design, the boxed grip recess has, on either side of the median line of maximum depression, a right side panel and a left side panel respectively inscribed in a first plane and a second plane which intersect according to an opening angle of between 25 ° and 45 °.

Such an opening of the boxed grip indentation promotes the correct insertion of at least one of a person's fingers, whether right-handed or left-handed.

Below 25 °, inserting at least one of the fingers into the boxed indentation becomes difficult, and above 45 ° gripping the container using the handle is no longer easy or effective.

According to an advantageous characteristic, the body has, over its predetermined height H and along the central axis C, a transverse section which fits inside a circle whose diameter decreases from a top end of the predetermined height. , then which increases to a lower end of the predetermined height.

This decrease in the diameter of the circle in which the body is inscribed induces a decrease in the minimum developed necessary to be able to grip the container with one hand.

The body thus has smaller dimensions over its predetermined height which make it easier to grip the container with one hand.

In fact, when a person grasps the container, he inserts his fingers (for example from the index finger to the little finger) in the boxed grip recess and surrounds the body with the rest of his palm to position his thumb in opposition by relative to the body and form a clamp. Alternatively, although this is less natural, the person can grip the container by inserting their thumb into the boxed grip indentation and surround the body with the rest of their palm to come and position his other fingers in opposition to the body and form a clamp.

According to a preferred solution, the body has on its height

H predetermined positioning constriction of a finger diametrically opposed to the boxed gripping indentation, the function of which is to receive a finger in order to facilitate gripping of the container, as explained below.

Such a positioning constriction makes it easier to grip the container using one hand: in fact, tests have shown that when gripping the container, the thumb is naturally lodged in this constriction of

positioning while at least one other finger is naturally housed in the boxed grip recess.

Preferably, in the case of particularly light packaging, the body has at least over its predetermined height H annular reinforcing corrugations, the positioning constriction being positioned between two annular corrugations.

The body is thus reinforced over its predetermined height H, thus avoiding fragility of the container due to the presence of the positioning constraint. Such reinforcement is particularly important when the packaging requires a resistance that its weight and therefore the thickness of available PET cannot allow it to achieve.

In addition, the positioning constriction is then visually integrated on the body.

Advantageously, in the diametral plane and in an orthogonal projection on the central axis C, the positioning constriction is located above the mid-height of the boxed gripping indentation.

Gripping the container is thus even easier and more comfortable. Indeed, this arrangement of the positioning constriction with respect to the boxed grip recess then respects the morphology of a hand and the gesture conventionally performed to grab an object.

According to an advantageous embodiment, the median line of maximum depression is convex towards the central axis C, between an upper end and a lower end remote from the central axis C, the median line of maximum depression having successively from from the high end:

- a first portion having a radius of curvature R1; - a second portion having a radius of curvature R2;

the radius of curvature R1 being less than the radius of curvature R2.

According to this embodiment, the boxed grip recess has a profile that promotes gripping of the container using the handle formed on the body. Indeed, by having a radius of curvature smaller than that of the second portion, the first portion of the median line of maximum depression forms a larger stop than that formed by the second portion. This improves the way in which the weight of the container is exerted on the upper part of the finger (s) inserted in the boxed gripping recess, This also corresponds logically to the profile offered by the lengths of the four fingers of the hand, other than the thumb, when they are all inserted into the boxed recess.

According to another advantageous embodiment, the median line

of maximum depression is convex towards the central axis C, between an upper end and a lower end remote from the central axis C, the median line of maximum depression presenting successively from the upper end:

- a first curved portion;

- an essentially straight intermediate portion;

- a second curved portion.

This design forms a housing for ergonomically accommodating in the boxed gripping recess all fingers except the thumb when gripping the container.

Other characteristics and advantages of the invention will emerge more clearly on reading the following description of two preferred embodiments of the invention, given by way of illustrative and non-limiting example, and the accompanying drawings, among which:

[Fig. 1] is a perspective view of a container according to a first embodiment of the invention, illustrating in particular the boxed grip recess;

[Fig. 2] is a side view of the container according to the first embodiment of the invention, showing on the boxed gripping recess and the positioning constriction of a finger;

[Fig. 3] is a sectional view of the first embodiment of the container, along the diametral plane, in which is located a central axis of the container; [Fig. 4] is a horizontal sectional view of the first embodiment of the container passing, through the deepest point of the median line of maximum depression of the boxed grip indentation;

[Fig. 5] is a sectional view of a second embodiment of the container, along the diametral plane, in which is located a central axis of the container;

[Fig. 6] is a horizontal sectional view of the second embodiment of the container, passing through the deepest point of the center line of maximum depression of the boxed grip indentation.

As shown in Figures 1, 2, 3 and 5, a container 1 according to the invention comprises a body 10 which extends along a central axis C between an opening 11 and a bottom 12.

The opening 11 is conventionally present at the end of a neck 13 located above a shoulder 14 surmounting the body 10.

More particularly, the container 1 is, according to the illustrated embodiments, a bottle made from a thermoplastic material such as PET (acronym for polyethylene terephthalate).

The container 1 has a boxed grip recess 2. This boxed grip recess 2 extends parallel to the central axis C over a predetermined height H.

Such a boxed recess is produced during the manufacture of the container 1 using a boxing insert which deforms the plastic material previously heated and blown into a mold cavity of a mold, in the shape of the container to be obtained. , by penetrating inside the mold.

The boxed gripping indentation 2, produced using a boxing insert, cannot be obtained by the sole blowing of a preform on a determined shape of a mold (for example a protuberance projecting towards the inside the molding cavity), and in particular with regard to the depth of the

boxed grip recess 2. In fact, as explained above, the depth of a boxed recess is greater than the maximum depth attainable by blowing a preform onto a determined shape of a mold.

According to the principle of the invention and as illustrated by Figures 3 and 5, the boxed grip indentation 2 has a center line 20 of maximum depression. This median line 20 of maximum depression corresponds to the profile of the boxing insert through the mold over the predetermined height H, and to the imprint that the boxing insert leaves on the container 1.

The boxed gripping indentation 2 also has, as shown in Figure 1, a right side border 21 as well as a left side border 22.

The right side border 21 and the left side border 22 frame the center line 20 of maximum sag.

Still according to the principle of the invention and with reference to Figures 3 to 6, the median line 20 of maximum depression is in a diametral plane P which is equidistant from the right side border 21 and from the left side border 22.

This diametral plane P corresponds to the views of Figures 3 and 5, and is shown in Figures 4 and 6.

In addition, the boxed gripping recess 2 is the only boxed recess on the body 10 over the predetermined height H.

That is to say that at the predetermined height H, the body 10 does not present any other boxing. The body 10 may however have other recesses which are not made by boxing over the predetermined height H.

With reference to Figures 4 and 6, the deepest point 200 of the center line 20 of maximum depression is located 5 millimeters to 15 millimeters from the central axis C of the container 1 without the boxed grip indentation 2 n ' interferes with the central axis C.

According to the present embodiment, the deepest point 200 of the center line 20 of maximum depression is located at a distance D of 7.5 millimeters from the central axis C.

As illustrated by Figures 4 and 6, it is understood that the boxing insert, during the manufacture of this container 1, is moved along a translation axis, inscribed in a median plane of the insert, secant with the central axis C of the container.

In this way, the container 1 can be formed by stretch blow molding.

Indeed, during its manufacture, it is not necessary for an extension rod to be raised in advance to allow the boxing of the boxed gripping recess 2 on, or in, or through, the volume occupied by this rod. elongation when fully inserted into the container 1. As illustrated by Figures 4 and 6, the body 10 is symmetrical with respect to the diametral plane P over the predetermined height H.

The boxed gripping indentation 2 is detailed below with reference to Figures 3 to 6.

As illustrated in Figure 4, the boxed gripping indentation 2 has an opening angle a.

More specifically, the boxed grip indentation 2 has on either side of the center line 20 of maximum depression a right side panel 210 and a left side panel 220.

The right side panel 210 fits into a first plane L1, and the left side panel 220 fits into a second plane L2.

The first plane L1 and the second plane L2 intersect according to the opening angle a which is between 25 ° and 45 °, and more preferably from 30 ° to 40 °. This opening angle a is measured in a plane orthogonal to the central axis C.

According to the embodiment illustrated in Figure 4, the opening angle a is equal to 35 °. According to the embodiment illustrated in Figure 6, the opening angle a is equal to 37 °.

Referring to Figures 2, 4 and 6, the first plane L1 and the second plane L2 intersect in a plane orthogonal to the central axis C and over the predetermined height H at a meeting point 5.

This meeting point 5 is located behind the central axis C relative to the boxed grip recess 2.

This meeting point 5 is also located in the diametral plane P.

As illustrated by Figures 3 and 5, the center line 20 of maximum depression is convex towards the central axis C, between a high end and a low end remote from the central axis C.

In other words, the center line 20 of maximum depression is curved between its upper and lower ends so that a central part of this center line 20 of maximum depression is closer to the central axis C than said ends.

As illustrated by the detail of Figure 3, and according to the first embodiment, the center line 20 of maximum sag has:

- a first portion 201;

- a second portion 202. The first portion 201 extends from the upper end of the center line 20 of maximum depression to the deepest point 200 of the center line 20 of maximum depression.

The second portion 202, for its part, extends from the first portion 201, and in particular from the deepest point 200, to the lower end of the center line 20 of maximum depression.

The first portion 201 has a radius of curvature R1, and the second portion 202 has a radius of curvature R2.

As shown in Figure 3, the radius of curvature R1 is less than the radius of curvature R2.

This design moves the deepest point 200 of the center line 20 of maximum depression above the mid-height M of the boxed grip recess 2, i.e. towards the opening 11 of the container.

As illustrated by the detail of Figure 5, and according to the second embodiment, the center line 20 of maximum sag has:

- a first portion 201;

- a second portion 202;

- an intermediate portion 203.

The first portion 201 extends from the upper end of the center line 20 of maximum sinkage to the deepest point 200 of the center line 20 of maximum sinkage.

The intermediate portion 203 extends from the first portion 201, and in particular from the deepest point 200, to an intermediate point 204 along the center line 20 of maximum depression.

The second portion 202 in turn extends from the intermediate portion 203, and in particular from the intermediate point 204, to the lower end of the center line 20 of maximum depression.

The first portion 201 has a radius of curvature R1, the second portion 202 has a radius of curvature R2., And the intermediate portion 203 has a radius of curvature R3.

As illustrated by Figure 5, the radius of curvature R1 and the radius of curvature R2 are such that the first portion 201 and the second portion 202 have significant curvature, and are thus curved. The intermediate portion 203 is essentially straight. For this purpose, the radius of curvature R3 is so large that the intermediate portion 203 can be likened to a straight line.

Referring to Figures 1 to 3, the body 10 has, on its predetermined height H and along the central axis C a cross section, such as that shown in Figure 4, which fits inside a circle.

Preferably, over the predetermined height H, the diameter of the circle decreases from an upper end of the predetermined height H, that is to say towards the opening 11 of the container 1, then, after having reached a predetermined minimum diameter, increases to a lower end of the predetermined height H, that is to say towards the bottom 12 of the container 1.

In other words, in such a case of reduction in diameter, the container 1 exhibits a thinning over its predetermined height H.

As illustrated by Figures 1, 2, 3 and 5, the body 10 has over its predetermined height H a positioning constraint 3 of a finger.

This positioning constriction 3 is diametrically opposed to the boxed gripping indentation 2.

This positioning constriction 3 is obtained by virtue of the shape of the mold cavity.

More precisely, the positioning constriction 3 is obtained thanks to the blowing of the plastic material, during the production of the container 1, and thus to the application of the plastic material against the surface of the mold which has a shape complementary to that of the container 1 illustrated. by figure 3.

The positioning constriction 3 is substantially smooth.

As illustrated in Figures 1, 2, and 3, the body 10 may have annular corrugations 4 of reinforcement, distributed regularly over its height. These annular reinforcing corrugations 4 are in particular present on the predetermined height H.

As illustrated by Figures 1, 2 and 3, the annular corrugations 4 of reinforcement on the predetermined height H can be configured so that the positioning constriction 3 is positioned between two adjacent annular corrugations 4.

Indeed, above the positioning constriction 3, the annular corrugations 4 extend from the boxed gripping recess 2 by orienting upwards, and below the positioning constriction 3, the corrugations annulars 4 extend from the boxed gripping recess 2 while facing downwards.

The two annular corrugations 4 which frame the shrinkage of

positioning 2 thus deviate from each other at the positioning constriction 3.

Referring to Figure 3, in the diametral plane P and in an orthogonal projection on the central axis C, the positioning constriction 3 is located above the mid-height M of the boxed grip recess 2.

Such a container 1 according to the invention is more ergonomic when handling the bottle thanks to the presence of the boxed gripping recess 2 and the positioning constriction 3 of a finger.

In fact, when gripping the container with a hand, the user's fingers, with the exception of the thumb, naturally come to be inserted into the boxed gripping recess 2. The thumb of the hand is then oriented towards the opening 11 of the container. Thus, the position of the positioning neck 3, above the mid-height M of the boxed gripping recess 2, helps a natural positioning of the thumb for gripping the bottle.

Referring to Figures 4 and 6, the body 10 has a first developed 101 and a second developed 102 on either side of the diametral plane P of the body 10.

The first developed 101 and the second developed 102 correspond to the perimeter of the body 10, in a plane orthogonal to the central axis C, between the deepest point 200 and a point 23 diametrically opposite the deepest point 200.

The lengths of the first press 101 and second press 102 are each between 100 and 160 millimeters.

According to the embodiments illustrated by FIGS. 4 and 6, the first developed 101 and the second developed 102 are equal given that the body 10 is symmetrical with respect to the diametral plane P over the predetermined height H.

With reference to the first embodiment illustrated by FIG. 4, the first developed 101 and the second developed 102 are equal to 126 millimeters.

With reference to the second embodiment illustrated by FIG. 6, the first developed 101 and the second developed 102 are equal to 140 millimeters.

Such gripping developments allow good gripping of the containers by hands of different dimensions.

Claims

1. A container (1) made of plastic material comprising a body (10) extending along a central axis (C) between an opening (11) and a bottom (12), the body (10) having a boxed grip recess ( 2) extending parallel to the central axis (C) over a predetermined height (H),

characterized in that the boxed grip indentation (2) is the only boxed indentation on the body (10) over the predetermined height (H), and has:

- a median line (20) of maximum sag;

- a right side border (21) and a left side border (22) framing the median line (20) of maximum sag;

the median line (20) of maximum sag inscribed in a diametral plane (P) equidistant from the right side border (21) and the left side border (22).

2. Container (1) according to the preceding claim, characterized in that at least one deepest point (200) of the median line (20) of maximum depression is located 15 millimeters or less from the central axis ( VS).

3. Container (1) according to the preceding claim, characterized in that the deepest point or points (200) are located 5 millimeters or more from the central axis (C).

4. Container (1) according to any one of claims 2 or 3, characterized in that the body (10) has a first developed (101) and a second developed (102) on either side of the diametral plane P of the body (10), between said deepest point (200) and a point (23) diametrically opposite said deepest point (200), the lengths of the first press (101) and the second press (102) each being included from 100 to 160 millimeters.

5. Container (1) according to any one of the preceding claims, characterized in that the body (10) is symmetrical with respect to the diametral plane (P) over the predetermined height (H).

6. Container (1) according to any one of the preceding claims,

characterized in that the boxed grip indentation (2) has on either side of the median line (20) of maximum depression a right side panel (210) and a left side panel (220) respectively inscribed in a first plane (L1) and a second plane (L2) which intersect at an opening angle of between 25 ° and 45 °.

7. Container (1) according to any one of the preceding claims,

characterized in that the body (10) has, over its predetermined height (H) and along the central axis (C), a cross section which fits inside a circle whose diameter decreases since an upper end of the predetermined height (H), then which increases to a lower end of the predetermined height (H).

8. Container (1) according to any one of the preceding claims,

characterized in that the body (10) has over its predetermined height (H) a positioning constraint (3) of a finger, the positioning constriction (3) being diametrically opposed to the boxed gripping recess (2).

9. A container (1) according to claim 8, characterized in that the body (10) has at least over its predetermined height (H) annular reinforcing corrugations, the positioning constriction being positioned between two annular corrugations.

10. Container (1) according to any one of claims 8 or 9, characterized in that, in the diametral plane (P) and in an orthogonal projection on the central axis (C), the positioning constriction (3) is located above the mid-height (M) of the boxed grip recess (2).

11. A container (1) according to any one of the preceding claims, characterized in that the median line (20) of maximum depression is convex towards the central axis (C), between an upper end and a lower end remote from the central axis (C),

the median line (20) of maximum sag presenting successively from the upper end:

- a first portion (201) having a radius of curvature R1;

- a second portion (202) having a radius of curvature R2;

the radius of curvature R1 being less than the radius of curvature R2.

12. Container (1) according to any one of claims 1 to 10, characterized in that the median line (20) of maximum depression is convex towards the central axis (C), between an upper end and a lower end. away from the central axis (C),

the median line (20) of maximum sag presenting successively from the upper end:

- a first curved portion (201);

- an intermediate portion (203) essentially straight;

- a second curved portion (202).