EP2785603B1 - Behälter mit einem gebogenen boden mit sternförmigem querschnitt - Google Patents

Behälter mit einem gebogenen boden mit sternförmigem querschnitt Download PDF

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Publication number
EP2785603B1
EP2785603B1 EP13719993.1A EP13719993A EP2785603B1 EP 2785603 B1 EP2785603 B1 EP 2785603B1 EP 13719993 A EP13719993 A EP 13719993A EP 2785603 B1 EP2785603 B1 EP 2785603B1
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EP
European Patent Office
Prior art keywords
container
arch
seat
section
axis
Prior art date
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Active
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EP13719993.1A
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English (en)
French (fr)
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EP2785603A1 (de
Inventor
Michel Boukobza
Laurent Penet
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Sidel Participations SAS
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Sidel Participations SAS
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Priority to PL13719993T priority Critical patent/PL2785603T3/pl
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    • 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
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom

Definitions

  • the invention relates to containers obtained by blow molding or stretching from blanks (preforms or intermediate containers having undergone one or more prior blowing operations) of plastic.
  • the blow-molding of a container comprises a step of introducing, into a mold in the impression of the container, a pre-heated blank at a temperature above the glass transition temperature of the material constituting the preform (such as than PET), and a step of injection into the blank of a fluid (such as air) under pressure. Stretching by means of a sliding rod can complete the blowing.
  • blowing difficulties (called “blowing” capacity of the container to be formed by blowing, that is to say, the capacity of the material to marry properly mold cavity) because the thickness of the material makes it difficult to creep into the cavities of the mold corresponding to the ribs.
  • JP08133260 , US4247012 , US2003 / 0061014 , US5236097 and GB2034663 disclose a blown container having a vault on the bottom.
  • Another solution is to push back the constituent material of the bottom of the container, using for this, inter alia, a special mold equipped with a mold bottom movable in translation that pushes the material (see in particular the European patent EP 1 069 983 ).
  • the repoussage induces an increase in the rate of deformation of the material and therefore a mechanical increase in its crystallinity, the repoussage phase conferring on the bottom of the container its final shape.
  • boxing does not guarantee that the rigidity of the bottom will be sufficient and does not exonerate the manufacturers to resort to particular forms that remain subject to the constraints of blowing.
  • This bottom offers both good structural rigidity and good blowing, while not requiring additional material, to the benefit of the lightness of the container.
  • PET polyethylene terephthalate
  • This container 1 comprises a body 2 of generally cylindrical shape around a main axis X.
  • the body 2 is extended at an upper end by a neck 3 forming a rim and, at a lower end, by a bottom 4.
  • the bottom 4 comprises a seat 5 in the form of an annular bead (in this case O-ring) which extends in the extension of the body 2 and ends axially by a continuous annular face which forms the lower end of the container and defines a laying plane 6 perpendicular to the axis X of the container 1, by which it can rest stably on a flat surface such as a table.
  • a seat 5 in the form of an annular bead (in this case O-ring) which extends in the extension of the body 2 and ends axially by a continuous annular face which forms the lower end of the container and defines a laying plane 6 perpendicular to the axis X of the container 1, by which it can rest stably on a flat surface such as a table.
  • D denotes the overall width measured transversely of the body 2.
  • this width D overall corresponds to a diameter.
  • the laying plane 6 meanwhile, is perpendicular to the axis X of the container 1.
  • the laying plane 6 extends radially over a width denoted d which, in the illustrated examples where the container 1 is symmetrical with revolution, corresponds to a diameter.
  • the seat 5 is connected externally to the body 2 by a fillet 7 with large radius; the diameter d of the laying plane 6 and the overall diameter D of the body are preferably in a ratio of between 0.65 and 0.9. In the example shown, this ratio is about 0.7: d D ⁇ 0 , 7
  • the seat 5 Towards the inside of the container 1, the seat 5 is connected, by an annular cheek 8 in the form of a short radius fillet, to a membrane 9 conical open-angle angle (in the illustrated examples, this angle is about 135 °) and having a small radial extension.
  • the bottom 4 further comprises a conical arch 10 extending from an inner edge 11 of the membrane 9 inwardly of the container 1 to a central apex 12 . From the inner edge 11 of the membrane 9 (which, given the small radial extension of the membrane 9, remains in the vicinity of the seat 5 ) to the top 12, the roof 10 has a cross section (perpendicular to the axis ) a starry profile.
  • this starry profile is inscribed between an inner circle 13 (virtual) and an outer circle 14 (virtual) having respective diameters D1 and D2 whose ratio is greater than or equal to 0.7. According to a preferred embodiment illustrated in the figures, this ratio is between 0.8 and 0.9: D 1 D 2 ⁇ 0.7
  • the star formed by the profile (in cross section) of the vault 10 has branches 15 whose radial extension is small compared to the radius (or diameter) overall of the star.
  • the vault 10 thus comprises a series of facets 16 which, grouped in pairs, define the branches 15 of the star.
  • the angles between the facets 16 of the same branch 15, and between two adjacent facets 16 of two adjacent branches 15 are preferably obtuse.
  • angles A, B are advantageously greater than or equal to 100 °.
  • angles A and B are about 100 ° and 150 °, respectively.
  • the roof 10 has an axial extension (or height), measured axially between the seat 5 and the top 12, denoted H.
  • H an axial extension (or height), measured axially between the seat 5 and the top 12, denoted H.
  • the vault 10 is advantageously deep, that is to say that the height H of the vault is not negligible compared to the diameter d of the seat 5, the H / d ratio being greater than 0.25. In the illustrated examples, this ratio is about 0.3.
  • the roof 10 is unitary and extends continuously from the membrane 9 to the top 12.
  • the roof 10 preferably has, in axial section ( figure 4 ), a concavity curved profile facing the X axis of the container 1.
  • the radius of curvature of the vault denoted R0
  • R0 the radius of curvature of the vault
  • the vault 10 has an acute average angle C at the top, between 70 ° and 90 °. In the example shown (cf. figure 4 ), this average angle C at the top is about 80 °.
  • the vault 10 is stepped and comprises two superimposed portions, namely a lower portion 17 on the side of the seat 5, and an upper portion 18 on the side of the top 12.
  • the lower portion 17 and the upper portion 18 both have in section a star-shaped profile inscribed between an inner circle 13 and an outer circle 14 having respective diameters D1 and D2 whose ratio D1 / D2 is greater than 0.7. ( Figures 9 and 10 ).
  • the lower portion 17 extends from the inner edge 11 of the membrane 9 (in the vicinity of the seat 5 ) to an intermediate joining zone 19 located at approximately mid-height of the roof 10 , and the upper portion 18 extends from the intermediate junction zone 19 to the top 12 of the vault 10 .
  • the lower portion 17 is substantially conical at an acute angle E at the vertex, this angle E at the vertex being preferably between 40 ° and 60 °, and for example about 50 °, as illustrated in FIG. figure 8 .
  • the upper portion 18 is, for its part, substantially conical at an angle F obtuse at the apex, this angle F at the vertex being preferably between 100 ° and 120 °, and for example about 110 °, as illustrated in FIG. figure 8 .
  • the intermediate junction zone 19 (where a juncture between the lower portion 17 and the upper portion 18 ) is located approximately halfway up the vault 10 , the lower portion 17 and the upper portion 18 have axial extensions (or heights), respectively denoted H1 and H2, equivalent or practically equivalent, such that: H 1 ⁇ H 2 ⁇ H 2
  • the lower portion 17 has, in axial section, a curved profile concavity turned towards the axis X of the container 1, while the upper portion 18 has, in axial section, a curved profile concavity turned to the opposite the axis X. in other words, the concavity of the arch 10 is reversed between the lower portion 17 and upper portion 18, at their intermediate region 19 junction.
  • the lower portion 17 and the upper portion 18 preferably have respective radii of curvature, denoted R1 and R2, which are of the same order of magnitude and are comparable to the radius of the laying plane.
  • R1 and R2 are of the same order of magnitude and are comparable to the radius of the laying plane.
  • the radii R1 and R2 are not of the same order of magnitude, but that R1 may be less than or equal to R2.
  • the radii R1 and R2 are for example in a ratio between 0.6 and 1: 0.6 ⁇ R 1 R 2 ⁇ 1
  • This arch 10 gives the bottom 4 a good compromise between blowing and resistance to deformation.
  • the star shape of the vault 10 makes it possible to obtain a good axial stiffness, that is to say a good resistance to compression along the X axis , the 16 angular facets acting at the stiffening manner and opposing a reversal of the vault 10 under the effect of the pressure in the container 1.
  • the inversion of curvature 10 in the stepped arch gives it the advantage of greater Blowing through a lesser amount of material necessary for its realization.
  • Tests have thus demonstrated that a container having the vault 10 described above can be manufactured with a much lower blowing fluid pressure than that required for a container with vaults according to the prior art. More specifically, while a mean blowing pressure of between 35 and 38 bar was necessary to make a vault container of equivalent strength, the container 1 provided with the vault 10 described above can be made by injecting a fluid into a container. blowing pressure of the order of 24 bar, which represents a reduction of 30% to 40%. This results in lower requirements for blowing fluid and it becomes possible to employ smaller pressurized fluid production facilities.
  • the manufacture of the bottom 4 of the container 1 can be advantageously carried out by implementing a boxing technique, in which the mold in which the container 1 is formed has a movable mold bottom which makes it possible to overstretch the material at the bottom 4 , with the benefit of a good impression and a higher degree of crystallinity (favorable to the structural rigidity of the bottom).
  • the container 1 is particularly suitable for filling carbonated beverages, especially beer.

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Claims (10)

  1. Behälter (1) aus Kunststoff, der einen Körper (2), der sich entlang einer Hauptachse (X) erstreckt, und einen Boden (4) in der Verlängerung des Körpers (2) an einer Unterseite desselben umfasst, wobei der Boden (4) umfasst:
    - einen ringförmigen Auflagebereich (5), der eine Aufstellebene (6) definiert;
    - eine konische Wölbung (10), welche sich von einer Umgebung des Auflagebereichs (5) in Richtung des Inneren des Behälters (1) bis zu einem zentralen Scheitelbereich (12) erstreckt,
    dadurch gekennzeichnet, dass sich die Wölbung (10) in Richtung des Inneren des Behälters (1) bis zu einem zentralen Scheitelbereich (12) ausgehend von einem inneren Rand (11) einer Membran (9) erstreckt, an welche der Auflagebereich angeschlossen ist, dadurch, dass sie im Querschnitt ein sternförmiges Profil aufweist, das zwischen zwei Kreisen (13, 14) einbeschrieben ist, deren Verhältnis D1/D2 der Durchmesser (D1, D2) größer oder gleich 0,7 ist, und dadurch, dass sie wenigstens einen Abschnitt umfasst, welcher im axialen Schnitt ein gekrümmtes Profil mit der Achse (X) des Behälters (1) zugewandter Konkavität aufweist.
  2. Behälter (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis D1/D2 der Durchmesser (D1, D2) zwischen 0,8 und 0,9 liegt.
  3. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wölbung (10) eine Reihe von Facetten (16) aufweist, die zwischen sich stumpfe Winkel (A, B) in einer quer verlaufenden Ebene definieren.
  4. Behälter (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Winkel (A, B) zwischen Facetten (16) größer oder gleich 100° sind.
  5. Behälter (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Wölbung (10) einheitlich ist und sich durchgehend von der Membran (9) zum Scheitelbereich (12) erstreckt, im axialen Schnitt das gekrümmte Profil mit der Achse (X) des Behälters (1) zugewandter Konkavität aufweist und einen Krümmungsradius (R0) aufweist, der größer oder gleich dem Durchmesser (d) des Auflagebereichs ist.
  6. Behälter (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Wölbung (10) zwei übereinander angeordnete Abschnitte umfasst, nämlich einen unteren Abschnitt (17), der im Wesentlichen konisch mit spitzem Winkel ist und der sich von der Umgebung des Auflagebereichs (5) bis zu einem Verbindungs-Zwischenbereich (19) erstreckt, wobei dieser untere Abschnitt (17) im axialen Schnitt das gekrümmte Profil mit in Richtung der Achse (X) des Behälters (1) gewandter Konkavität aufweist, und einen oberen Abschnitt (18), der im Wesentlichen konisch mit stumpfem Winkel ist und der sich von dem Verbindungs-Zwischenbereich (19) bis zum Scheitelbereich (12) erstreckt.
  7. Behälter (1) nach Anspruch 6, dadurch gekennzeichnet, dass der untere Abschnitt (17) und der obere Abschnitt (18) der Wölbung (10) äquivalente oder praktisch äquivalente axiale Erstreckungen (H1, H2) aufweisen.
  8. Behälter (1) nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass der obere Abschnitt (18) der Wölbung (10) im axialen Schnitt ein gekrümmtes Profil mit von der Achse (X) des Behälters (1) abgewandter Konkavität aufweist.
  9. Behälter (1) nach Anspruch 8, dadurch gekennzeichnet, dass im axialen Schnitt die Profile des unteren Abschnitts (17) und des oberen Abschnitts (18) solche jeweiligen Krümmungsradien (R1, R2) aufweisen, dass das Verhältnis R2/R1 zwischen 0,6 und 1 liegt.
  10. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wölbung (10) eine axial gemessene Höhe (H) aufweist, und dadurch, dass der Auflagebereich eine in Querrichtung gemessene Breite (d) aufweist, wobei das Verhältnis (H/d) dieser Abmessungen größer als 0,25 ist.
EP13719993.1A 2012-04-17 2013-04-10 Behälter mit einem gebogenen boden mit sternförmigem querschnitt Active EP2785603B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13719993T PL2785603T3 (pl) 2012-04-17 2013-04-10 Pojemnik zawierający sklepione dno o gwiaździstym przekroju

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1253543A FR2989356B1 (fr) 2012-04-17 2012-04-17 Recipient comprenant un fond voute a section etoilee
PCT/FR2013/050773 WO2013156710A1 (fr) 2012-04-17 2013-04-10 Récipient comprenant un fond voûté à section étoilée

Publications (2)

Publication Number Publication Date
EP2785603A1 EP2785603A1 (de) 2014-10-08
EP2785603B1 true EP2785603B1 (de) 2018-12-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13719993.1A Active EP2785603B1 (de) 2012-04-17 2013-04-10 Behälter mit einem gebogenen boden mit sternförmigem querschnitt

Country Status (7)

Country Link
US (1) US9598201B2 (de)
EP (1) EP2785603B1 (de)
CN (1) CN104136329B (de)
FR (1) FR2989356B1 (de)
MX (1) MX350909B (de)
PL (1) PL2785603T3 (de)
WO (1) WO2013156710A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9272827B2 (en) 2008-08-29 2016-03-01 Pepsico, Inc. Post-mix beverage system
GB2527171B (en) * 2014-06-12 2016-04-27 Lucozade Ribena Suntory Ltd Bottle and base
EP2957522B1 (de) * 2014-06-17 2017-05-03 Sidel Participations Behälter mit einer gekrümmten umkehrbaren Membran
EP3109176A1 (de) * 2015-06-23 2016-12-28 Sidel Participations Behälter mit einer gekrümmten umkehrbaren membran
US10464797B2 (en) 2016-01-15 2019-11-05 Pepsico, Inc. Post-mix beverage system
US10610045B2 (en) 2016-06-14 2020-04-07 Pepsico, Inc. Beverage system including a removable piercer
BR112019025417A2 (pt) 2017-06-12 2020-06-16 Société des Produits Nestlé S.A. Base de fundo de um recipiente dotada de arco bicôncavo
FR3076818B1 (fr) 2018-01-18 2019-12-13 Sidel Participations Recipient comprenant un fond voute presentant des bossages de rigidification repartis en bandes annulaires imbriquees
DE102022115361A1 (de) * 2022-06-21 2023-12-21 Optipack Gmbh Verpackungsbehälter

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB2034663A (en) * 1978-11-07 1980-06-11 Yoshino Kogyosho Co Ltd Synthetic resin thin-walled bottle
US4247012A (en) * 1979-08-13 1981-01-27 Sewell Plastics, Inc. Bottom structure for plastic container for pressurized fluids
US20030061014A1 (en) * 2001-09-17 2003-03-27 Cheng J. John Method of designing a champagne-type base for a plastic container

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US3718229A (en) * 1971-10-26 1973-02-27 Du Pont Noneverting bottom for thermoplastic bottles
US4525401A (en) 1979-11-30 1985-06-25 The Continental Group, Inc. Plastic container with internal rib reinforced bottom
AU626878B2 (en) * 1988-06-24 1992-08-13 Hoover Universal Inc. Polyester container for hot fill liquids
US5236097A (en) * 1991-11-04 1993-08-17 Hoover Universal Inc. Plastic container with improved base structure
JP3423452B2 (ja) * 1994-11-02 2003-07-07 日精エー・エス・ビー機械株式会社 二軸延伸ブロー成形容器及びその成形型
US5503283A (en) * 1994-11-14 1996-04-02 Graham Packaging Corporation Blow-molded container base structure
US6277321B1 (en) 1998-04-09 2001-08-21 Schmalbach-Lubeca Ag Method of forming wide-mouth, heat-set, pinch-grip containers
US8127955B2 (en) * 2000-08-31 2012-03-06 John Denner Container structure for removal of vacuum pressure
US6634517B2 (en) * 2001-09-17 2003-10-21 Crown Cork & Seal Technologies Corporation Base for plastic container
FR2892048B1 (fr) * 2005-10-17 2008-01-04 Sidel Sas Fond de moule pour moule de fabrication de recipients thermoplastiques, et dispositif de moulage equipe d'au moins un moule equipe d'un tel fond.
US8548879B2 (en) * 2007-12-14 2013-10-01 The Boeing Company Materials management system
FR2941924B1 (fr) * 2009-02-12 2011-05-13 Sidel Participations Recipient dont le fond est muni d'une voute flexible a double assise

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034663A (en) * 1978-11-07 1980-06-11 Yoshino Kogyosho Co Ltd Synthetic resin thin-walled bottle
US4247012A (en) * 1979-08-13 1981-01-27 Sewell Plastics, Inc. Bottom structure for plastic container for pressurized fluids
US20030061014A1 (en) * 2001-09-17 2003-03-27 Cheng J. John Method of designing a champagne-type base for a plastic container

Also Published As

Publication number Publication date
US9598201B2 (en) 2017-03-21
MX2014010087A (es) 2014-09-16
WO2013156710A1 (fr) 2013-10-24
EP2785603A1 (de) 2014-10-08
FR2989356B1 (fr) 2014-04-11
CN104136329B (zh) 2016-08-17
PL2785603T3 (pl) 2019-08-30
US20150136725A1 (en) 2015-05-21
FR2989356A1 (fr) 2013-10-18
CN104136329A (zh) 2014-11-05
MX350909B (es) 2017-09-25

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