EP3390237B1 - Container having a petaloid base with rib feet - Google Patents

Container having a petaloid base with rib feet Download PDF

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Publication number
EP3390237B1
EP3390237B1 EP16825508.1A EP16825508A EP3390237B1 EP 3390237 B1 EP3390237 B1 EP 3390237B1 EP 16825508 A EP16825508 A EP 16825508A EP 3390237 B1 EP3390237 B1 EP 3390237B1
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EP
European Patent Office
Prior art keywords
container
rib
foot
ribs
plane
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EP16825508.1A
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German (de)
French (fr)
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EP3390237A1 (en
Inventor
Ivan Pierre
Laurent NAVEAU
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Sidel Participations SAS
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Sidel Participations SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/40—Details of walls
    • B65D1/42—Reinforcing or strengthening parts or members
    • B65D1/44—Corrugations

Definitions

  • the invention relates to the manufacture of containers, in particular bottles, by blow molding or stretch blow molding from blanks (preforms or unfinished intermediate containers) in a thermoplastic material such as PET (polyethylene terephthalate).
  • a thermoplastic material such as PET (polyethylene terephthalate).
  • a container as shown in the document JP 2011 057263 A , usually comprises a body, which gives the container its volume, an open neck, which projects from an upper end of the body and through which the container is filled (generally by means of a liquid or of a dough), and a bottom, which closes the body opposite the neck and forms a base on which the container must be able to rest stably on a flat surface such as a table.
  • the bottom It is generally sought to give the bottom good mechanical rigidity because, in addition to the fact that the bottom must form a stable base for the container (not only during the conveying operations following its filling, but also during its storage and its daily use by consumers), it must also resist the hydrostatic pressure exerted by the contents, any thermal stresses induced by a high temperature of the contents when the latter is introduced hot into the container, or even a possible gas pressure dissolved in the liquid (typical case of carbonated drinks).
  • the ideal bottom shape would be the sphere, as it would evenly distribute the stresses applied to it.
  • PET receptacles with a spherical bottom were manufactured on which a base in the shape of a pot was fitted, made of a more flexible material (notably polypropylene, to allow it to be snapped onto the bottom). But this design made recycling difficult, as the two materials had to follow different channels, forcing the operators in charge of selective sorting to carry out the separation of the base from the container themselves.
  • One objective is therefore to propose a petaloid bottom which, although lightened, is nevertheless less subject to uncontrolled deformations than the known petaloid bottoms.
  • a plastic container obtained by blow molding or stretch blow molding from a blank, this container comprising a body, a neck which extends at an upper end of the body and a petaloid bottom which extends at a lower end of the body, this petaloid bottom being provided with projecting feet, separated by recessed valleys which extend radially from a central zone of the bottom, each foot having an outer wall which extends in the extension of the body and two flanks each bordering a valley and which are each connected to the outer wall by a fillet, each foot being provided with at least one rib, a lateral portion of which overlaps said fillet.
  • this (or these) rib(s) By unfolding under the pressure of the contents of the container, this (or these) rib(s) absorb(s) part of the deformations induced in the foot which are thus channeled, which avoids the formation of undesirable creases.
  • a container 1 is shown, obtained by blow molding or stretch blow molding from a blank (term denoting a raw injection preform or an intermediate container intended to undergo one or more finishing operations) made of plastic material, eg. made of PET (polyethylene terephthalate).
  • a blank term denoting a raw injection preform or an intermediate container intended to undergo one or more finishing operations
  • plastic material eg. made of PET (polyethylene terephthalate).
  • the container 1 comprises a body 2 , which extends along an axis X which may constitute an axis of revolution of the body 2 , a neck 3 which extends to an upper end of the body 2 , and a bottom 4 petaloid which extends at a lower end of the body 2 , opposite the neck 3 .
  • the bottom 4 is provided with projecting feet 5 , separated two by two by recessed valleys 6 which extend radially from a central zone 7 of the bottom 4 .
  • Each foot 5 extends axially as far as one end 8 .
  • the ends 8 of the feet 5 are coplanar and together define a laying plane 9 by which the container 1 can rest stable on a horizontal flat surface (typically a table).
  • Each foot 5 has an outer wall 10 , which extends in the extension of the body 2 , and two sides 11 each bordering a valley 6 and which are each connected to the outer wall 10 by a fillet 12 .
  • each fillet 12 widens from an upper end 13 of the valley 6 towards the end 8 of the foot.
  • the radius of fillet 12 can be constant, or increase.
  • each flank 11 has a crescent shape (but this shape is not limiting). It will be noted that the limits between the different zones of the foot 5 are not sharp edges but are soft (otherwise these limits would accumulate the stresses and would form, under load, as many incipient fractures). For reasons of clarity, however, these limits have been marked on the drawings (in the form of double dashed lines).
  • Each foot 5 has a plane symmetry with respect to a radial plane R (containing the axis X of the container 1 ) passing through its end 8 .
  • Each foot 5 thus comprises a single outer wall 10 , symmetrical with respect to this plane R , two fillets 12 which are the mirror image of each other with respect to this plane R, and two sides 11 which are also mirror image of each other with respect to this R -plane.
  • each foot 5 is provided with at least one rib 14 . Seen in section, this rib 14 protrudes (that is to say it forms a relief) towards the inside of the container 1 ( figure 6 ). Alternatively, this rib 14 protrudes outward from the container.
  • the rib 14 comprises a lateral portion 15 which overlaps the fillet 12 , that is to say that this lateral portion 15 extends over at least a part of the width of the fillet 12 .
  • each foot 5 can be provided with three ribs 14 (or three pairs of ribs 14 symmetrical with respect to the radial plane R of symmetry of the foot) superimposed (cf. the first bottom 4 illustrated on the figures 1 to 5 , which comprises, for each foot 5 , an upper rib 14.1 , an intermediate rib 14.2 and a lower rib 14.3 ).
  • each foot 5 can be provided with two (or two pairs of) superimposed ribs 14 (cf.
  • each foot 5 can be provided with a single rib 14 (or a single pair of ribs 14 symmetrical with respect to to the plane R of symmetry of the foot 5 ).
  • At least one (or each) rib 14 could thus have an arcuate outer portion 17 and one (or each) straight side portion 15 .
  • each rib 14 depends on the angle from which the bottom 4 is observed.
  • each rib 14.1, 14.2 , 14.3 has the shape of an open U.
  • each rib 14.1 , 14.2, 14.3 has a circular shape.
  • each rib 14.1, 14.2, 14.3 has a Gaussian shape.
  • each rib 14.4, 14.5 When a 5 foot from the second bottom 4 of the figures 7 to 9 is observed from below ( figure 9 ), each rib 14.4, 14.5 also has an open U-shape. When a foot of this same bottom is observed laterally ( figure 8 ), each rib 14.4, 14.5 extends along a straight line.
  • each foot 5 comprises several superposed ribs 14
  • the ribs 14 can, when examined going up in the direction of the neck from the end 8 of the foot 5 , be of different lengths (for example increasing, cf. the first bottom 4 illustrated on the figures 2, 3 and 4 ) or of the same length (see the second bottom 4 illustrated on the figures 7, 8 and 9 ).
  • each foot 5 comprises a number of ribs 14 greater than or equal to three, these can be equidistant, as in the first bottom 4 illustrated on the figures 1 to 5 .
  • the container 1 is intended to be filled with a content under pressure, typically a carbonated drink, which generates in the container 1 a pressure which can reach 6 bars.
  • a content under pressure typically a carbonated drink
  • the uncontrolled (undesirable) deformations of the legs 5 are minimized, or even eliminated, even when the container 1 is lightened.
  • the aesthetics of the container 1 is preserved, and its resistance under load (in particular in palletization) increased, at equal or lower mass.

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Description

L'invention a trait à la fabrication des récipients, notamment des bouteilles, par soufflage ou étirage soufflage à partir d'ébauches (préformes ou récipients intermédiaires non finis) dans une matière thermoplastique tel que le PET (polytéréphtalate d'éthylène).The invention relates to the manufacture of containers, in particular bottles, by blow molding or stretch blow molding from blanks (preforms or unfinished intermediate containers) in a thermoplastic material such as PET (polyethylene terephthalate).

Un récipient, tel que montré dans le document JP 2011 057263 A , comprend d'ordinaire un corps, qui confère au récipient son volume, un col ouvert, qui s'étend en saillie à partir d'une extrémité supérieure du corps et par lequel on remplit le récipient (généralement au moyen d'un liquide ou d'une pâte), et un fond, qui ferme le corps à l'opposé du col et forme un socle par lequel le récipient doit pouvoir reposer de manière stable sur une surface plane telle qu'une table.A container, as shown in the document JP 2011 057263 A , usually comprises a body, which gives the container its volume, an open neck, which projects from an upper end of the body and through which the container is filled (generally by means of a liquid or of a dough), and a bottom, which closes the body opposite the neck and forms a base on which the container must be able to rest stably on a flat surface such as a table.

On cherche en général à conférer au fond une bonne rigidité mécanique car, outre que le fond doit former une assise stable pour le récipient (non seulement lors des opérations de convoyage consécutives à son remplissage, mais également lors de son entreposage et de son utilisation quotidienne par les consommateurs), il doit également résister à la pression hydrostatique exercée par le contenu, à d'éventuelles contraintes thermiques induites par une température élevée du contenu lorsque celui-ci est introduit chaud dans le récipient, ou encore à une éventuelle pression de gaz dissous dans le liquide (cas typique des boissons carbonatées).It is generally sought to give the bottom good mechanical rigidity because, in addition to the fact that the bottom must form a stable base for the container (not only during the conveying operations following its filling, but also during its storage and its daily use by consumers), it must also resist the hydrostatic pressure exerted by the contents, any thermal stresses induced by a high temperature of the contents when the latter is introduced hot into the container, or even a possible gas pressure dissolved in the liquid (typical case of carbonated drinks).

Si elle permettait au récipient de tenir debout, la forme idéale du fond serait la sphère, car elle répartirait uniformément les contraintes qui lui sont appliquées. Il fut un temps où l'on fabriquait des récipients en PET à fond sphérique sur lequel on emboîtait un socle rapporté en forme de pot, réalisé dans un matériau plus souple (notamment en polypropylène, pour permettre son encliquetage sur le fond). Mais cette conception rendait difficile le recyclage, les deux matériaux devant suivre des filières différentes, obligeant les opérateurs chargés du tri sélectif à procéder eux-mêmes à la séparation du socle du récipient.If it allowed the container to stand upright, the ideal bottom shape would be the sphere, as it would evenly distribute the stresses applied to it. There was a time when PET receptacles with a spherical bottom were manufactured on which a base in the shape of a pot was fitted, made of a more flexible material (notably polypropylene, to allow it to be snapped onto the bottom). But this design made recycling difficult, as the two materials had to follow different channels, forcing the operators in charge of selective sorting to carry out the separation of the base from the container themselves.

L'avènement du fond pétaloïde a permis de s'affranchir de ces problèmes : un tel fond comprend une alternance de pieds en saillie, destinés à assurer le maintien vertical du récipient posé sur une surface plane horizontale, et de vallées convexes (généralement sous forme de portions de sphère) qui absorbent une partie des efforts (thermiques, mécaniques) exercés par le contenu.The advent of the petaloid bottom made it possible to overcome these problems: such a bottom comprises an alternation of projecting feet, intended to ensure the vertical maintenance of the container placed on a flat horizontal surface, and convex valleys (generally under form of portions of a sphere) which absorb part of the forces (thermal, mechanical) exerted by the content.

C'est dans des récipients à fonds pétaloïdes que sont ordinairement contenues les boissons carbonatées. Les capacités de ces récipients sont variables : par exemple 0,2 l 0,5 l, 1 l, 1,5 l, 2 l voire plus.It is in receptacles with petaloid bottoms that carbonated drinks are usually contained. The capacities of these containers are variable: for example 0.2 l, 0.5 l, 1 l, 1.5 l, 2 l or even more.

Les normes environnementales (toujours plus contraignantes) et le caractère aléatoire des cours des matières premières contraignent les fabricants à réduire la quantité de matière employée, ce qui se traduit par une diminution du poids (et donc de l'épaisseur) des récipients.Environmental standards (ever more stringent) and the uncertain nature of raw material prices force manufacturers to reduce the quantity of material used, which results in a reduction in the weight (and therefore the thickness) of the containers.

On observe, sur les fonds pétaloïdes allégés, des déformations indésirables. En particulier, on note sur les pieds l'apparition de plissures. Outre leur caractère inesthétique, les plissures peuvent former des amorces de rupture, surtout lorsque les récipients sont palettisés : aux contraintes dues à la pression interne s'ajoutent en effet des contraintes de compression dues au poids des récipients superposés.Undesirable deformations are observed on the lighter petaloid backgrounds. In particular, we note the appearance of creases on the feet. In addition to their unsightly nature, creases can form incipient fractures, especially when the containers are palletized: to the stresses due to the internal pressure are in fact added compressive stresses due to the weight of the stacked containers.

Même les perfectionnements récents apportés aux fonds pétaloïdes (cf. notamment la demande de brevet européen EP 2 560 887 au nom de la demanderesse) ne permettent pas de s'affranchir de ces plissures.Even the recent improvements made to petaloid backgrounds (see in particular the European patent application EP 2 560 887 in the name of the plaintiff) do not make it possible to overcome these creases.

Un objectif est par conséquent de proposer un fond pétaloïde qui, bien qu'allégé, soit cependant moins sujet aux déformations non contrôlées que les fonds pétaloïdes connus.One objective is therefore to propose a petaloid bottom which, although lightened, is nevertheless less subject to uncontrolled deformations than the known petaloid bottoms.

A cet effet, il est proposé, comme divulgué dans la revendication 1, un récipient en matière plastique obtenu par soufflage ou étirage soufflage à partir d'une ébauche, ce récipient comprenant un corps, un col qui s'étend à une extrémité supérieure du corps et un fond pétaloïde qui s'étend à une extrémité inférieure du corps, ce fond pétaloïde étant muni de pieds en saillie, séparés par des vallées en creux qui s'étendent radialement à partir d'une zone centrale du fond, chaque pied ayant une paroi externe qui s'étend dans le prolongement du corps et deux flancs bordant chacun une vallée et qui se raccordent chacun à la paroi externe par un congé, chaque pied étant pourvu d'au moins une nervure dont une portion latérale chevauche ledit congé.To this end, it is proposed, as disclosed in claim 1, a plastic container obtained by blow molding or stretch blow molding from a blank, this container comprising a body, a neck which extends at an upper end of the body and a petaloid bottom which extends at a lower end of the body, this petaloid bottom being provided with projecting feet, separated by recessed valleys which extend radially from a central zone of the bottom, each foot having an outer wall which extends in the extension of the body and two flanks each bordering a valley and which are each connected to the outer wall by a fillet, each foot being provided with at least one rib, a lateral portion of which overlaps said fillet.

En se déployant sous la pression du contenu du récipient, cette (ou ces) nervure(s) absorbe(nt) une partie des déformations induites dans le pied qui sont ainsi canalisées, ce qui évite la formation de plissures indésirables.By unfolding under the pressure of the contents of the container, this (or these) rib(s) absorb(s) part of the deformations induced in the foot which are thus channeled, which avoids the formation of undesirable creases.

Diverses caractéristiques supplémentaires peuvent être prévues, seules ou en combinaison :

  • au moins une nervure présente une portion d'extrémité interne qui s'étend au moins en partie sur un flanc, dans le prolongement de la portion latérale ;
  • au moins une nervure présente une portion externe qui s'étend au moins en partie sur la paroi externe du pied, dans le prolongement de la portion latérale ;
  • la nervure s'interrompt, vers l'extérieur, sur la paroi externe du pied ;
  • le récipient comprend au moins une nervure ayant deux portions latérales qui se raccordent par la portion externe ;
  • la portion externe est arquée ;
  • la (ou chaque) portion latérale est arquée en sens inverse de la portion externe ;
  • la nervure suit le contour d'une intersection du pied avec un cylindre de révolution autour d'un axe radial ;
  • la portion latérale est droite ;
  • la nervure suit le contour d'une intersection du pied avec un plan ;
  • les pieds ayant des extrémités qui définissent pour le récipient un plan de pose, le plan d'intersection précité est parallèle (ou, en variante, incliné par rapport) au plan de pose ;
  • le récipient comprend au moins deux nervures superposées ;
  • le récipient comprend trois nervures superposées ;
  • les nervures sont équidistantes ;
  • examinées en remontant en direction du col depuis une extrémité du pied, les nervures sont de longueurs croissantes ;
  • les nervures suivent le contour d'une intersection du pied avec des cylindres de révolution coaxiaux, d'axe radial et de rayons différents ;
  • au moins une nervure s'interrompt, vers l'intérieur, sur le congé de raccordement entre la paroi externe et le flanc ;
  • la (ou chaque) nervure présente une largeur comprise entre 0,4 mm et 1,5 mm.
Various additional features may be provided, alone or in combination:
  • at least one rib has an internal end portion which extends at least partly over a sidewall, in the extension of the lateral portion;
  • at least one rib has an outer portion which extends at least in part over the outer wall of the foot, in the extension of the lateral portion;
  • the rib is interrupted, towards the outside, on the external wall of the foot;
  • the container comprises at least one rib having two side portions which are connected by the outer portion;
  • the outer portion is arched;
  • the (or each) side portion is arcuate in the opposite direction to the outer portion;
  • the rib follows the contour of an intersection of the foot with a cylinder of revolution around a radial axis;
  • the side portion is straight;
  • the rib follows the contour of an intersection of the foot with a plane;
  • the legs having ends which define a laying plane for the receptacle, the aforementioned intersection plane being parallel (or, as a variant, inclined with respect to) the laying plane;
  • the container comprises at least two superposed ribs;
  • the container comprises three superposed ribs;
  • the ribs are equidistant;
  • examined up towards the neck from one end of the foot, the ribs are of increasing length;
  • the ribs follow the contour of an intersection of the foot with coaxial cylinders of revolution, of radial axis and of different radii;
  • at least one rib is interrupted, inwardly, on the fillet between the outer wall and the sidewall;
  • the (or each) rib has a width of between 0.4 mm and 1.5 mm.

D'autres objets et avantages de l'invention apparaîtront à la lumière de la description d'un mode de réalisation, faite ci-après en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective, par-dessous, d'un récipient à fond pétaloïde dont les pieds sont nervurés ;
  • la figure 2 est une vue de détail, à échelle agrandie, du fond du récipient de la figure 1 ;
  • la figure 3 est une vue de détail de dessous, à échelle agrandie, d'un pied nervuré ;
  • la figure 4 est une vue de côté du fond du récipient ;
  • la figure 5 est une vue de détail, à échelle agrandie, d'un pied du récipient de la figure 4, selon l'encadré V ;
  • la figure 6 est une vue de détail en coupe du fond, à échelle agrandie, selon le plan de coupe VI-VI de la figure 5 ;
  • la figure 7 est une vue similaire à la figure 4, illustrant une variante de réalisation ;
  • la figure 8 est une vue de détail, de côté, d'un pied du fond de la figure 7 ;
  • la figure 9 est une vue de détail de dessous, à échelle agrandie, d'un pied nervuré du fond illustré sur la figure 7.
Other objects and advantages of the invention will appear in the light of the description of an embodiment, given below with reference to the appended drawings in which:
  • the figure 1 is a perspective view, from below, of a vessel with a petaloid bottom and ribbed feet;
  • the figure 2 is a detail view, on an enlarged scale, of the bottom of the container of the figure 1 ;
  • the picture 3 is a detail view from below, on an enlarged scale, of a ribbed foot;
  • the figure 4 is a side view of the bottom of the container;
  • the figure 5 is a detail view, on an enlarged scale, of a foot of the container of the figure 4 , according to Box V;
  • the figure 6 is a detailed sectional view of the bottom, on an enlarged scale, according to sectional plane VI-VI of the figure 5 ;
  • the figure 7 is a view similar to the figure 4 , illustrating a variant embodiment;
  • the figure 8 is a detail, side, one foot view of the bottom of the figure 7 ;
  • the figure 9 is a detail view from below, on an enlarged scale, of a ribbed foot of the bottom illustrated in the figure 7 .

Sur la figure 1 est représenté un récipient 1, obtenu par soufflage ou étirage soufflage à partir d'une ébauche (terme désignant une préforme brute d'injection ou un récipient intermédiaire destiné à subir une ou plusieurs opérations de finition) en matière plastique, par ex. en PET (polytéréphtalate d'éthylène).On the figure 1 a container 1 is shown, obtained by blow molding or stretch blow molding from a blank (term denoting a raw injection preform or an intermediate container intended to undergo one or more finishing operations) made of plastic material, eg. made of PET (polyethylene terephthalate).

Le récipient 1 comprend un corps 2, qui s'étend le long d'un axe X qui peut constituer un axe de révolution du corps 2, un col 3 qui s'étend à une extrémité supérieure du corps 2, et un fond 4 pétaloïde qui s'étend à une extrémité inférieure du corps 2, opposée au col 3.The container 1 comprises a body 2 , which extends along an axis X which may constitute an axis of revolution of the body 2 , a neck 3 which extends to an upper end of the body 2 , and a bottom 4 petaloid which extends at a lower end of the body 2 , opposite the neck 3 .

Le fond 4 est muni de pieds 5 en saillie, séparés deux à deux par des vallées 6 en creux qui s'étendent radialement à partir d'une zone 7 centrale du fond 4.The bottom 4 is provided with projecting feet 5 , separated two by two by recessed valleys 6 which extend radially from a central zone 7 of the bottom 4 .

Chaque pied 5 s'étend en saillie axiale jusqu'à une extrémité 8. Les extrémités 8 des pieds 5 sont coplanaires et définissent conjointement un plan 9 de pose par lequel le récipient 1 peut reposer de manière stable sur une surface plane horizontale (typiquement une table).Each foot 5 extends axially as far as one end 8 . The ends 8 of the feet 5 are coplanar and together define a laying plane 9 by which the container 1 can rest stable on a horizontal flat surface (typically a table).

Chaque pied 5 présente une paroi 10 externe, qui s'étend dans le prolongement du corps 2, et deux flancs 11 bordant chacun une vallée 6 et qui se raccordent chacun à la paroi 10 externe par un congé 12.Each foot 5 has an outer wall 10 , which extends in the extension of the body 2 , and two sides 11 each bordering a valley 6 and which are each connected to the outer wall 10 by a fillet 12 .

Selon un mode de réalisation illustré sur les figures, et notamment sur les figures 3 et 4, chaque congé 12 va en s'élargissant depuis une extrémité 13 supérieure de la vallée 6 en direction de l'extrémité 8 du pied. Dans la même direction, le rayon du congé 12 peut être constant, ou aller croissant.According to an embodiment illustrated in the figures, and in particular in the figure 3 and 4 , each fillet 12 widens from an upper end 13 of the valley 6 towards the end 8 of the foot. In the same direction, the radius of fillet 12 can be constant, or increase.

Comme on le voit également sur les figures 3 et 4 , chaque flanc 11 présente une forme de croissant (mais cette forme n'est pas limitative). On notera que les limites entre les différentes zones du pied 5 ne sont pas des arêtes tranchantes mais sont douces (faute de quoi ces limites accumuleraient les contraintes et formeraient, sous charge, autant d'amorces de rupture). Pour des raisons de clarté, on a toutefois matérialisé ces limites sur les dessins (sous forme de traits mixtes doubles).As we also see on the figure 3 and 4 , each flank 11 has a crescent shape (but this shape is not limiting). It will be noted that the limits between the different zones of the foot 5 are not sharp edges but are soft (otherwise these limits would accumulate the stresses and would form, under load, as many incipient fractures). For reasons of clarity, however, these limits have been marked on the drawings (in the form of double dashed lines).

Chaque pied 5 présente une symétrie plane par rapport à un plan R radial (contenant l'axe X du récipient 1) passant par son extrémité 8. Chaque pied 5 comprend ainsi une unique paroi 10 externe, symétrique par rapport à ce plan R, deux congés 12 qui sont l'image miroir l'un de l'autre par rapport à ce plan R, et deux flancs 11 qui sont également l'image miroir l'un de l'autre par rapport à ce plan R.Each foot 5 has a plane symmetry with respect to a radial plane R (containing the axis X of the container 1 ) passing through its end 8 . Each foot 5 thus comprises a single outer wall 10 , symmetrical with respect to this plane R , two fillets 12 which are the mirror image of each other with respect to this plane R, and two sides 11 which are also mirror image of each other with respect to this R -plane.

Comme on le voit sur les figures, chaque pied 5 est pourvu d'au moins une nervure 14. Vue en section, cette nervure 14 fait saillie (c'est-à-dire qu'elle forme un relief) vers l'intérieur du récipient 1 (figure 6). En variante, cette nervure 14 fait saillie vers l'extérieur du récipient.As seen in the figures, each foot 5 is provided with at least one rib 14 . Seen in section, this rib 14 protrudes (that is to say it forms a relief) towards the inside of the container 1 ( figure 6 ). Alternatively, this rib 14 protrudes outward from the container.

Quelle que soit sa forme (on en décrit plusieurs ci-après), la nervure 14 comprend une portion 15 latérale qui chevauche le congé 12, c'est-à-dire que cette portion 15 latérale s'étend sur au moins une partie de la largeur du congé 12.Whatever its shape (several of them are described below), the rib 14 comprises a lateral portion 15 which overlaps the fillet 12 , that is to say that this lateral portion 15 extends over at least a part of the width of the fillet 12 .

Le nombre de nervures 14 présentes sur chaque pied 5 peut être fonction de la capacité volumique du récipient 1. Ainsi, dans un récipient 1 de grande capacité (1,5 1,2 l ou encore 3 l), chaque pied 5 peut être pourvu de trois nervures 14 (ou trois paires de nervures 14 symétriques par rapport au plan R radial de symétrie du pied) superposées (cf. le premier fond 4 illustré sur les figures 1 à 5, qui comprend, pour chaque pied 5, une nervure 14.1 supérieure, une nervure 14.2 intermédiaire et une nervure 14.3 inférieure). Dans un récipient 1 de capacité moyenne (0,5 l ou 1 l), chaque pied 5 peut être pourvu de deux (ou deux paires de) nervures 14 superposées (cf. le deuxième fond 4 illustré sur les figures 7, 8 et 9, qui comprend, pour chaque pied 5, une paire de nervures 14.4 supérieures symétriques et une paire de nervures 14.5 inférieures symétriques). Dans un récipient 1 de faible capacité (inférieure à 0,5 l, par ex. de 0,2 l), chaque pied 5 peut être pourvu d'une unique nervure 14 (ou d'une unique paire de nervures 14 symétriques par rapport au plan R de symétrie du pied 5).The number of ribs 14 present on each foot 5 can be a function of the volume capacity of the container 1 . Thus, in a container 1 of large capacity (1.5 1.2 l or even 3 l), each foot 5 can be provided with three ribs 14 (or three pairs of ribs 14 symmetrical with respect to the radial plane R of symmetry of the foot) superimposed (cf. the first bottom 4 illustrated on the figures 1 to 5 , which comprises, for each foot 5 , an upper rib 14.1 , an intermediate rib 14.2 and a lower rib 14.3 ). In a container 1 of medium capacity (0.5 l or 1 l), each foot 5 can be provided with two (or two pairs of) superimposed ribs 14 (cf. the second bottom 4 illustrated on the figures 7, 8 and 9 , which comprises, for each foot 5 , a pair of symmetrical upper ribs 14.4 and a pair of symmetrical lower ribs 14.5 ). In a container 1 of low capacity (less than 0.5 l, for example 0.2 l), each foot 5 can be provided with a single rib 14 (or a single pair of ribs 14 symmetrical with respect to to the plane R of symmetry of the foot 5 ).

Au moins l'une des nervures 14 peut présenter une ou plusieurs des caractéristiques suivantes :

  • la portion 15 latérale s'étend sur toute la largeur du congé 12, joignant ainsi la paroi 10 externe à l'un des flancs 11 du pied 5 ; c'est le cas de la nervure 14.1 supérieure du premier fond 4 (figures 3 et 4) et des nervures 14.4, 14.5 du deuxième fond 4 (figures 7, 8, 9) ;
  • la nervure 14 se prolonge sur le flanc 11, au-delà du congé 12 ; la nervure 14 présente alors une portion 16 d'extrémité interne, qui s'étend au moins en partie sur le flanc 11, dans le prolongement de la portion 15 latérale : c'est le cas de la nervure 14.1 supérieure du premier fond 4 (figures 3 et 4) et des deux nervures 14.4, 14.5 du deuxième fond 4 (figures 7, 8, 9) ;
  • la portion 15 latérale s'étend sur une partie seulement du congé 12, partant de la paroi 10 externe et venant s'interrompre au voisinage de la limite entre le congé 12 et le flanc 11 : c'est le cas de la nervure 14.2 intermédiaire du premier fond 4 (figures 3 et 4) ;
  • la portion 15 latérale s'étend sur une partie seulement du congé 12, partant de la paroi 10 externe et s'interrompant sensiblement à mi-chemin entre la paroi 10 externe et le flanc 11 : c'est le cas de la nervure 14.3 inférieure du premier fond 4 (figures 3 et 4) ;
  • la nervure 14 présente une portion 17 externe qui s'étend au moins en partie sur la paroi 10 externe du pied 5, dans le prolongement de la portion 15 latérale : c'est le cas de la nervure 14.1 supérieure du premier fond 4 (figures 3 et 4) et des deux nervures 14.4, 14.5 du deuxième fond 4 (figures 7, 8, 9) ;
  • la nervure 14 s'interrompt, vers l'extérieur, sur la paroi 10 externe du pied 5 : la nervure 14 présente alors une portion 18 d'extrémité externe, qui s'étend en partie sur la paroi 10 externe : c'est le cas des nervures 14.4, 14.5 du deuxième fond 4 des figures 7, 8, 9 ; le pied 5 illustré sur ces figures comprend deux paires superposées de nervures 14 symétriques par rapport au plan R de symétrie du pied 5. Les nervures 14.4, 14.5 de chaque paire sont écartées l'une de l'autre, leurs portions 18 d'extrémité externe s'interrompant à une distance l'une de l'autre de quelques millimètres ;
  • la portion 17 externe s'étend sur toute la largeur de la paroi 10 externe ; la nervure 14 comprend alors deux portions 15 latérales qui se raccordent par la portion 17 externe : c'est le cas des nervures 14.1, 14.2, 14.3 du premier fond 4 des figures 3 et 4 ;
  • la portion 17 externe est arquée : c'est le cas des nervures 14.1, 14.2, 14.3 du premier fond 4 des figures 3 et 4, dont les portions 17 externes s'étendent suivant un arc à concavité tournée vers le plan 9 de pose ;
  • la (ou chaque) portion 15 latérale est en outre arquée en sens inverse de la portion 17 externe : c'est le cas des nervures 14.1, 14.2, 14.3 du premier fond des figures 3 et 4, dont les portions 15 latérales s'étendent suivant un arc à concavité tournée vers le col 3 ;
  • la nervure 14 suit le contour d'une intersection du pied 5 avec un cylindre C de révolution autour d'un axe radial : c'est le cas des nervures du premier fond 4 des figures 3, 4 et 5 ; dans ce premier fond 4, et comme cela est bien visible sur la figure 5, les nervures 14.1, 14.2, 14.3 suivent le contour d'une intersection du pied 5 avec des cylindres C1, C2, C3 de révolution respectifs, de même axe A radial et de rayons différents ;
  • en variante, la nervure 14 suit le contour d'une intersection du pied 5 avec un plan P incliné par rapport au plan 9 de pose : c'est le cas des nervures 14.4, 14.5 du deuxième fond 4 des figures 7, 8, 9 ; en variante, le plan P pourrait être parallèle au plan de pose ; dans les deux cas, la (ou chaque) portion 15 latérale apparaît droite au lieu d'être arquée ;
  • la nervure 14 présente une largeur L comprise entre 0,4 mm et 1,5 mm.
At least one of the ribs 14 may have one or more of the following characteristics:
  • the side portion 15 extends over the entire width of the fillet 12 , thus joining the outer wall 10 to one of the sides 11 of the foot 5 ; this is the case of the upper rib 14.1 of the first bottom 4 ( figure 3 and 4 ) and ribs 14.4, 14.5 of the second bottom 4 ( figures 7, 8, 9 );
  • the rib 14 extends on the side 11 , beyond the fillet 12 ; the rib 14 then has an inner end portion 16 , which extends at least partly on the sidewall 11 , in the extension of the side portion 15 : this is the case of the upper rib 14.1 of the first bottom 4 ( figure 3 and 4 ) and the two ribs 14.4 , 14.5 of the second bottom 4 ( figures 7, 8, 9 );
  • the side portion 15 extends over only part of the fillet 12 , starting from the outer wall 10 and interrupting in the vicinity of the limit between the fillet 12 and the sidewall 11 : this is the case of the intermediate rib 14.2 of the first bottom 4 ( figure 3 and 4 );
  • the side portion 15 extends over only part of the fillet 12 , starting from the outer wall 10 and interrupting substantially halfway between the outer wall 10 and the sidewall 11 : this is the case of the lower rib 14.3 of the first bottom 4 ( figure 3 and 4 );
  • the rib 14 has an outer portion 17 which extends at least in part on the outer wall 10 of the foot 5 , in the extension of the lateral portion 15 : this is the case of the rib 14.1 top of the first bottom 4 ( figure 3 and 4 ) and the two ribs 14.4 , 14.5 of the second bottom 4 ( figures 7, 8, 9 );
  • the rib 14 is interrupted, towards the outside, on the external wall 10 of the foot 5 : the rib 14 then has an external end portion 18 , which extends in part on the external wall 10 : this is the case of the ribs 14.4 , 14.5 of the second bottom 4 of the figures 7, 8, 9 ; the foot 5 illustrated in these figures comprises two superimposed pairs of ribs 14 symmetrical with respect to the plane R of symmetry of the foot 5 . The ribs 14.4, 14.5 of each pair are separated from each other, their outer end portions 18 interrupting at a distance from each other of a few millimeters;
  • the outer portion 17 extends over the entire width of the outer wall 10 ; the rib 14 then comprises two lateral portions 15 which are connected by the external portion 17 : this is the case of the ribs 14.1 , 14.2 , 14.3 of the first bottom 4 of the figure 3 and 4 ;
  • the outer portion 17 is arcuate: this is the case of the ribs 14.1, 14.2, 14.3 of the first bottom 4 of the figure 3 and 4 , whose outer portions 17 extend along an arc with a concavity facing the laying plane 9 ;
  • the (or each) side portion 15 is also arcuate in the opposite direction to the outer portion 17 : this is the case of the ribs 14.1, 14.2 , 14.3 of the first bottom of the figure 3 and 4 , whose side portions 15 extend along an arc with a concavity facing the neck 3 ;
  • the rib 14 follows the contour of an intersection of the foot 5 with a cylinder C of revolution around a radial axis: this is the case of the ribs of the first bottom 4 of the figure 3 , 4 and 5 ; in this first background 4, and as is clearly visible on the figure 5 , the ribs 14.1, 14.2, 14.3 follow the outline of an intersection of the foot 5 with cylinders C1 , C2 , C3 of respective revolution, of the same radial axis A and of different radii;
  • alternatively, the rib 14 follows the contour of an intersection of the foot 5 with a plane P inclined with respect to the laying plane 9 : this is the case of the ribs 14.4, 14.5 of the second bottom 4 of the figures 7, 8, 9 ; as a variant, the plane P could be parallel to the laying plane; in both cases, the (or each) side portion appears straight instead of arcuate;
  • the rib 14 has a width L of between 0.4 mm and 1.5 mm.

Il est envisageable de combiner certaines des caractéristiques précitées. Au moins une (ou chaque) nervure 14 pourrait ainsi présenter une portion 17 externe arquée et une (ou chaque) portion 15 latérale droite.It is conceivable to combine some of the aforementioned characteristics. At least one (or each) rib 14 could thus have an arcuate outer portion 17 and one (or each) straight side portion 15 .

Compte tenu du relief assez tortueux du pied 5, la forme générale de chaque nervure 14 dépend de l'angle selon lequel on observe le fond 4.Given the rather tortuous relief of the foot 5 , the general shape of each rib 14 depends on the angle from which the bottom 4 is observed.

Ainsi, lorsque le premier fond 4 des figures 1 à 5 est observé de dessous (figure 3), chaque nervure 14.1, 14.2, 14.3 présente une forme de U ouvert. Lorsqu'un pied 5 de ce même fond 4 est observé radialement par l'extérieur (voir le pied 5 situé au centre de la figure 4), chaque nervure 14.1, 14.2, 14.3 présente une forme circulaire. Lorsqu'un pied 5 de ce premier fond 4 est observé latéralement (voir les pieds 5 situés sur les côtés de la figure 4), chaque nervure 14.1, 14.2, 14.3 présente une forme de gaussienne.Thus, when the first bottom 4 of the figures 1 to 5 is observed from below ( picture 3 ), each rib 14.1, 14.2 , 14.3 has the shape of an open U. When a foot 5 of this same bottom 4 is observed radially from the outside (see foot 5 located in the center of the figure 4 ), each rib 14.1 , 14.2, 14.3 has a circular shape. When a 5 foot of this first bottom 4 is observed laterally (see the 5 feet located on the sides of the figure 4 ), each rib 14.1, 14.2, 14.3 has a Gaussian shape.

Lorsqu'un pied 5 du deuxième fond 4 des figures 7 à 9 est observé de dessous (figure 9), chaque nervure 14.4, 14.5 présente également une forme de U ouvert. Lorsqu'un pied de ce même fond est observé latéralement (figure 8), chaque nervure 14.4, 14.5 s'étend suivant une ligne droite.When a 5 foot from the second bottom 4 of the figures 7 to 9 is observed from below ( figure 9 ), each rib 14.4, 14.5 also has an open U-shape. When a foot of this same bottom is observed laterally ( figure 8 ), each rib 14.4, 14.5 extends along a straight line.

Lorsque chaque pied 5 comprend plusieurs nervures 14 superposées, les nervures 14 peuvent, lorsqu'examinées en remontant en direction du col depuis l'extrémité 8 du pied 5, être de longueurs différentes (par ex. croissantes, cf. le premier fond 4 illustré sur les figures 2, 3 et 4) ou de même longueur (cf. le deuxième fond 4 illustré sur les figures 7, 8 et 9).When each foot 5 comprises several superposed ribs 14 , the ribs 14 can, when examined going up in the direction of the neck from the end 8 of the foot 5 , be of different lengths (for example increasing, cf. the first bottom 4 illustrated on the figures 2, 3 and 4 ) or of the same length (see the second bottom 4 illustrated on the figures 7, 8 and 9 ).

Lorsque chaque pied 5 comprend un nombre de nervures 14 supérieur ou égal à trois, celles-ci peuvent être équidistantes, comme dans le premier fond 4 illustré sur les figures 1 à 5.When each foot 5 comprises a number of ribs 14 greater than or equal to three, these can be equidistant, as in the first bottom 4 illustrated on the figures 1 to 5 .

Le récipient 1 est destiné à être rempli d'un contenu sous pression, typiquement une boisson carbonatée, qui engendre dans le récipient 1 une pression qui peut atteindre 6 bars.The container 1 is intended to be filled with a content under pressure, typically a carbonated drink, which generates in the container 1 a pressure which can reach 6 bars.

Sa forme pétaloïde permet au fond 4 de conserver globalement sa forme sans s'effondrer, les vallées 6 assurant, grâce à leur forme sphérique, une répartition relativement homogène des contraintes qu'elles subissent en raison de la pression du contenu. Les pieds 5, quant à eux, sont soumis à d'importantes variations de contraintes en raison de leur forme tortueuse. Il a été constaté que les contraintes s'accumulent dans les congés 12, entre la paroi 10 externe et les flancs 11. Chaque nervure 14 contribue, en se déployant vers l'extérieur du récipient 1 (comme illustré en pointillés sur la figure 6) à canaliser les déformations engendrées par ces contraintes. En d'autres termes, les déformations sont localisées sur la (ou les) nervures 14. Il en résulte que les déformations incontrôlées (indésirables) des pieds 5 sont minimisées, voire éliminées, même lorsque le récipient 1 est allégé. L'esthétique du récipient 1 est préservée, et sa tenue sous charge (notamment en palettisation) accrue, à masse égale ou inférieure.Its petaloid shape allows the bottom 4 to retain its overall shape without collapsing, the valleys 6 ensuring, thanks to their spherical shape, a relatively homogeneous distribution of the stresses which they undergo due to the pressure of the contents. The feet 5 , for their part, are subject to significant stress variations due to their tortuous shape. It has been observed that the stresses accumulate in the fillets 12 , between the outer wall 10 and the sidewalls 11 . Each rib 14 contributes, by extending outwards from the container 1 (as illustrated in dotted lines on the figure 6 ) to channel the deformations generated by these stresses. In other words, the deformations are localized on the rib(s) 14 . As a result, the uncontrolled (undesirable) deformations of the legs 5 are minimized, or even eliminated, even when the container 1 is lightened. The aesthetics of the container 1 is preserved, and its resistance under load (in particular in palletization) increased, at equal or lower mass.

Claims (19)

  1. Container (1) made of plastics material obtained by blow moulding or stretch blow moulding from a blank, this container (1) comprising a body (2), a neck (3) which extends at an upper end of the body (2) and a petaloid base (4) which extends at a lower end of the body (2), this petaloid base (4) being provided with protruding feet (5) that are separated by recessed valleys (6) which extend radially from a central zone (7) of the base (4), each foot (5) having an external wall (10) which extends in the extension of the body (2) and two flanks (11) which each border a valley (6) and which are each connected to the external wall (10) by a fillet (12), characterized in that each foot (5) is provided with at least one rib (14), of which a lateral portion (15) straddles said fillet (12).
  2. Container (1) according to Claim 1, characterized in that at least one rib (14) has an internal end portion (16) which at least partially extends over a flank (11), in the extension of the lateral portion (15).
  3. Container (1) according to Claim 1 or Claim 2, characterized in that at least one rib (14) has an external portion (17) which at least partially extends over the external wall (10) of the foot (5), in the extension of the lateral portion (15).
  4. Container (1) according to Claim 3, characterized in that the rib (14) is interrupted, towards the outside, on the external wall (10) of the foot (5).
  5. Container (1) according to Claim 3, characterized in that it comprises at least one rib (14) having two lateral portions (15) which are connected by the external portion (17).
  6. Container (1) according to one of Claims 3 to 5, characterized in that the external portion (17) is curved.
  7. Container (1) according to Claim 6, characterized in that the (or each) lateral portion (15) is curved in the opposite direction to the external portion (17).
  8. Container (1) according to one of the preceding claims, characterized in that the rib (14) follows the contour of an intersection of the foot (5) with a cylinder (C) of revolution about a radial axis (A).
  9. Container (1) according to one of Claims 1 to 5, characterized in that the lateral portion (15) is straight.
  10. Container (1) according to one of Claims 1 to 4, characterized in that the rib (14) follows the contour of an intersection of the foot (5) with a plane (P).
  11. Container according to Claim 10, characterized in that, with the feet (5) having ends (8) that define a standing plane (9) for the container (1), the intersection plane (P) is inclined with respect to the standing plane (9).
  12. Container according to Claim 10, characterized in that, with the feet (5) having ends (8) that define a standing plane (9) for the container (1), the intersection plane (P) is parallel to the standing plane (9).
  13. Container (1) according to one of the preceding claims, characterized in that it comprises at least two superposed ribs (14).
  14. Container (1) according to Claim 13, characterized in that it comprises three superposed ribs (14).
  15. Container (1) according to Claim 14, characterized in that the ribs (14) are equidistant.
  16. Container (1) according to one of Claims 13 to 15, characterized in that, viewed in a direction going up towards the neck (3) from an end (8) of the foot (5), the ribs (14) have increasing lengths.
  17. Container (1) according to one of Claims 13 to 16, characterized in that the ribs (14) follow the contour of an intersection of the foot with coaxial cylinders of revolution (C1, C2, C3) of radial axis (A) and of different radii.
  18. Container (1) according to one of the preceding claims, characterized in that at least one rib (14) is interrupted, towards the inside, on the connecting fillet (12) between the external wall (10) and the flank (11).
  19. Container (1) according to one of the preceding claims, characterized in that the (or each) rib (14) has a width (L) of between 0.4 mm and 1.5 mm.
EP16825508.1A 2015-12-16 2016-12-14 Container having a petaloid base with rib feet Active EP3390237B1 (en)

Applications Claiming Priority (2)

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FR1562521A FR3045571B1 (en) 2015-12-16 2015-12-16 CONTAINER WITH PETALOID BASE WITH FEET RIBS
PCT/FR2016/053414 WO2017103467A1 (en) 2015-12-16 2016-12-14 Container having a petaloid base with rib feet

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EP3390237B1 true EP3390237B1 (en) 2022-08-10

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CN (1) CN108367833A (en)
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WO (1) WO2017103467A1 (en)

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DE102012003219A1 (en) * 2012-02-20 2013-08-22 Krones Ag Plastic container
CA2895524A1 (en) 2012-12-27 2014-07-03 Niagara Bottling, Llc Plastic container with strapped base
EP3233645A4 (en) * 2014-12-19 2018-09-26 The Coca-Cola Company Carbonated beverage bottle bases and methods of making the same
IT201800005338A1 (en) 2018-05-14 2019-11-14 CONTAINER IN THERMOPLASTIC MATERIAL
US10926911B2 (en) * 2018-10-15 2021-02-23 Pepsico. Inc. Plastic bottle with base
CN110155452A (en) * 2019-06-18 2019-08-23 广东星联精密机械有限公司 A kind of predeformation reinforcement container bottom
JP7370300B2 (en) * 2020-06-22 2023-10-27 サントリーホールディングス株式会社 plastic bottle
JP7370301B2 (en) * 2020-06-22 2023-10-27 サントリーホールディングス株式会社 plastic bottle

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GB2034663B (en) * 1978-11-07 1983-09-01 Yoshino Kogyosho Co Ltd Synthetic resin thin-walled bottle
US4997692A (en) * 1982-01-29 1991-03-05 Yoshino Kogyosho Co., Ltd. Synthetic resin made thin-walled bottle
JP2595865B2 (en) * 1992-11-11 1997-04-02 東洋製罐株式会社 Pressure vessel
US7543713B2 (en) * 2001-04-19 2009-06-09 Graham Packaging Company L.P. Multi-functional base for a plastic, wide-mouth, blow-molded container
MY156895A (en) * 2009-07-13 2016-04-15 Dainippon Printing Co Ltd Plastic bottle
JP5039762B2 (en) * 2009-09-10 2012-10-03 石塚硝子株式会社 Bottom structure of pressure-resistant packaging container
JP5695380B2 (en) * 2010-09-30 2015-04-01 株式会社吉野工業所 Plastic container

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CN108367833A (en) 2018-08-03
WO2017103467A1 (en) 2017-06-22
FR3045571B1 (en) 2018-01-26
US20180362205A1 (en) 2018-12-20
MX2018006696A (en) 2018-08-01
FR3045571A1 (en) 2017-06-23

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