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EP2697125B1 - Blütenförmiger behälterboden mit doppelmulde - Google Patents

Blütenförmiger behälterboden mit doppelmulde Download PDF

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Publication number
EP2697125B1
EP2697125B1 EP12722768.4A EP12722768A EP2697125B1 EP 2697125 B1 EP2697125 B1 EP 2697125B1 EP 12722768 A EP12722768 A EP 12722768A EP 2697125 B1 EP2697125 B1 EP 2697125B1
Authority
EP
European Patent Office
Prior art keywords
container
inflection
circle
section
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12722768.4A
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English (en)
French (fr)
Other versions
EP2697125A1 (de
Inventor
Michel Boukobza
Sylvain Meillerais
Laurent Penet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sidel Participations SAS
Original Assignee
Sidel Participations SAS
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Filing date
Publication date
Application filed by Sidel Participations SAS filed Critical Sidel Participations SAS
Publication of EP2697125A1 publication Critical patent/EP2697125A1/de
Application granted granted Critical
Publication of EP2697125B1 publication Critical patent/EP2697125B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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—Rigid or semi-rigid 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 or 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

Definitions

  • the invention relates to the manufacture of containers, in particular bottles, obtained by blow molding or stretch blow molding from preforms or intermediate containers of thermoplastic material.
  • a container generally comprises an open neck, through which the contents (for example a liquid), a body, which gives the container its volume, and a bottom, which closes the body opposite the neck and forms, are introduced or extracted. a base for holding and maintaining the container, when it rests on a surface.
  • contents for example a liquid
  • body which gives the container its volume
  • bottom which closes the body opposite the neck and forms, are introduced or extracted.
  • a base for holding and maintaining the container, when it rests on a surface.
  • the containers for carbonated beverages in which the pressure of the gas dissolved in the liquid induces significant mechanical stresses, are mainly provided with petaloid-shaped bottoms: the bottom comprises projecting feet, in the form of petals, separated by portions of convex wall, called valleys or valleys, which extend radially from a central zone of the bottom.
  • the feet are intended to maintain the container placed on a surface; the valleys are intended to absorb the forces (thermal, mechanical) undergone by the bottom (weight of the contents and / or superimposed containers, if any).
  • the documents US 5454481 , FR2772720 , US 5988416 and US 2010/072165 present bottles with petaloid bottoms for carbonated beverages.
  • the document US 4249667 discloses a plastic container, provided with a petaloid-shaped bottom according to the preamble of claim 1. It is known that the mechanical performance (i.e., in practice, its rigidity) of a petaloid bottom increases with the height of the bottom, because of the increase of the average height of the feet, that is to say the height of the protrusion that form each foot compared to the valleys which border it. But the bottom flowability, that is to say the ease with which the material can flow from the valleys to the feet, decreases concomitantly.
  • a plastic container comprising a body and a petaloid bottom as defined in claim 1.
  • the recess creates a discontinuity in the junction zone on the valleys. Thus, it allows, on the one hand, to increase the rigidity of the bottom.
  • the position of the recess improves the blowing at constant bottom height.
  • the recess reduces the height of the feet, that is to say the measured dimension axially from the seat, defining a laying plane, to the periphery.
  • a container 1 - in this case a bottle - obtained by blowing or stretching blow from a preform of thermoplastic material, for example polyethylene terephthalate (PET), previously heated.
  • PET polyethylene terephthalate
  • the bottom 3 also comprises a series of feet 5 formed by protuberances protruding outwardly from the container 1, and which extend from a central zone 6 of the bottom 3 in the form of a pellet, where the material has remained substantially amorphous, towards a periphery 7 of the bottom 3 where it is connected to the body 2.
  • a diameter of the periphery, denoted by A, is defined as being the minimum diameter of the circle in which the periphery 7 is inscribed .
  • the periphery 7 is circular, it being understood that the periphery 7 may be of any shape.
  • Each foot 5 has an end face 11 which extends gently from the central zone 6 of the bottom 3 towards the apex 8, so that the foot 5 has a substantially triangular profile in radial section ( figure 7 ). More specifically, as illustrated on the figure 7 , the end face 11 is slightly curved, concave towards the outside of the container 1, the concavity being accentuated near the central zone 6 of the bottom 3.
  • the valleys 12 are concave outwards in cross section (that is to say in a plane perpendicular to the radial direction, cf. Figures 4 to 6 ).
  • the radius of curvature of the valleys 12, measured in cross section, may be variable. More specifically, it is preferably low near the central zone 6 , and relatively greater near the periphery 7.
  • each valley 12 widens from the central zone 6 towards the periphery 7 that it joins. This widening is preferably continuous, that is to say that the edges of the valleys 12 form between them, at any point, a non-zero angle.
  • the valleys 12 have a contour in plan tulip-shaped (or bell) but this form is not restrictive, and the edges of the valleys 12 may be straight (the valleys 12 then having a contour V).
  • each valley 12 is devoid of branching (in particular on the periphery side 7 ) , and thus forms a unitary hollow reserve.
  • Each foot 5 is further delimited radially by an external face 15 which extends in the extension of the body 2 to the vicinity of the apex 8, to which the external face 15 is connected by a fillet 16.
  • the outer face 15 is connected to the body 2 by a fillet.
  • the outer face 15 is not cylindrical, but substantially conical of revolution around the main axis X. More specifically, the outer face 15 is inclined toward the central area 6 of the bottom 3 of the container 1 when approaching the laying plane. Furthermore, in radial section, the outer side 15 is not straight but convex.
  • the vertices 8 of the feet 5 are thus shifted towards the central zone 6 of the base 3, that is to say that they are not at right of the periphery 7. More precisely, the vertices 8 of the feet 5 are positioned so that the laying circle 10 is located radially recessed relative to the periphery 7, that is to say with respect to the circle in which is inscribed the periphery 7. In addition, the ratio between the diameter B of the laying circle 10 and the diameter A of the periphery 7 is less than 4/5.
  • the ratio between the diameter B of the laying circle 10 and the diameter A of the periphery 7 is between 2/5 and 4/5, and more preferably, the ratio between the diameters B and A is greater than 1. / 2, for example (as in the example shown) equal to 7/10.
  • the curvature C and D rays are not necessarily constant but may vary with the distance to the main axis X; in addition, the centers of curvature of sections 17 and 19 are not necessarily confused or located on the main axis X of the container.
  • This offset E is the value of the offset between the central section 17 and the peripheral section 19 . This offset E is defined as follows.
  • the value of the offset E may be between 0.5 mm and 6 mm, depending on the capacity of the container 1. For example, for a container 1 with a capacity of 1.5 L, the offset E is between 0.8 mm and 2 mm.
  • the ratio E / C is then advantageously between 1/100 and 1/25 and is for example equal to 1/50, as on the Figures 1 to 8 .
  • the first inflection 21 is softer than the second point of inflection 22, the angle ⁇ between the tangent to the first point of inflection 21 and the vertical direction is smaller than the angle ⁇ formed between the tangent to second inflection point 22 and the vertical direction.
  • the angle ⁇ between the tangent to the first point of inflection 21 and the vertical direction is between 40 ° and 65 °, and is for example equal to 55 °
  • the angle ⁇ between the tangent to the second point of inflection 22 and the vertical direction is between 70 ° and 85 °, and is for example equal to 80 °.
  • the second inflection circle 24 is between the central zone 6 of the bottom 3 and the laying circle 10 .
  • the laying circle 10 may be for example between the two circles 23, 24 inflection.
  • the ratio between the diameter B of the circle 10 of pose and the diameter G of the second circle 24 of inflection is preferably between 1.3 and 0.7, and is for example equal to about 1.1.
  • the step 20 makes it possible, on the one hand, to increase the rigidity of the bottom 3. Its position, on the other hand, makes it possible to improve the blowing, at the level of the constant bottom 3 .
  • the stresses generated for example by a pressure internal to the container 1 tend to accentuate the convexity of the valleys 12.
  • the recess 20, offering a sudden variation of curvature in the valleys 12, and more exactly by introducing a concavity change between the peripheral section 19 and the central section 17 reduces the deformability of the valleys 12.
  • the peripheral section 19 joins the periphery 7 at a lower height than if the central section 17 was extended to the periphery 7.
  • the presence of the recess 20 between the central section 17 and the peripheral section 19 can be combined with additional features to stiffen the bottom 3.
  • the bottom 3 can it be provided with radial grooves 25 extending recessed inwardly of the container 1, at the bottom and along the valleys 12 along a center line of a valley 12, from a vicinity of the central zone 6 to the vicinity of the periphery 7.
  • the grooves 25 serve to further increase the rigidity of the bottom 3.
  • the grooves 25 tend to flow, expanding and flattening, which causes an enlargement of the valleys 12 and, consequently, a verticalization of the feet 5 which opposes the overall subsidence of the bottom 3.
  • the peripheral section 19 can be connected to the periphery 7 by means of an external section 26 ( Figures 9 and 10 ), concave in the absence of constraints, which increases the mechanical performance of the bottom 3. Indeed, under the effect of a pressure inside the container 1, for example when filling the container 1, the central section 17 and section 19 both convex, of each valley 12, tend to inflate, while a reversal of the concave external section 26 , which then adopts a convex profile. The peripheral section 19 and the outer section 26 then form in fine a single continuous convex profile.
  • the feet 5 of the bottom 3 can be stiffened thanks to the formation of a projecting protruding stop, as described in the document FR 2,897,292 , in the name of the plaintiff.

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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, umfassend einen Körper (2) und einen blütenförmigen Boden (3), der den Körper (2) von einer Peripherie (7) ausgehend verlängert, wobei der Boden (3) eine Bodenwand (4) von allgemeiner nach außen konvexer Form umfasst, aus der Füße (5) herausragen, die Spitzen (8) definieren, die gemeinsam einen Sitz bilden, der in einen Aufstellkreis (10) mit einem Durchmesser (B) eingeschrieben ist, dessen Verhältnis mit einem Durchmesser (A) der Peripherie (7) kleiner als 4/5 ist, wobei die Füße (5) zwei und zwei durch Abschnitte der Bodenwand (4) getrennt sind, die hohle Mulden (12) bilden, die sich radial von einer zentralen Zone (6) des Bodens bis zur Peripherie (7) erstrecken, wobei jede Mulde (12) zwei aneinandergrenzende Abschnitte umfasst, nämlich:
    - einen zentralen Abschnitt (17), der sich von der zentralen Zone (6) des Bodens (3) bis zu einer Verbindungszone (18) erstreckt, die sich senkrecht zu dem Aufstellkreis (10) befindet und in einer Radialebene einen ersten Krümmungsradius (C) aufweist,
    - einen Umfangsabschnitt (19), der sich von der Verbindungszone (18) bis zur Peripherie (7) erstreckt und in der Radialebene einen zweiten Krümmungsradius (D) aufweist, dadurch gekennzeichnet, dass der Umfangsabschnitt (19) nach außen zum Behälter (1) um einen Versatzwert (E) in Bezug zum zentralen Querschnitt (17) versetzt ist, wobei die Verbindungszone (18) eine Stufe (20) bildet, die zwei aufeinanderfolgende Wendepunkte (21, 22) definiert,
    - wobei der Versatzwert (E) zwischen dem zentralen Abschnitt (17) und dem Umfangsabschnitt (19) gleich dem Abstand zwischen zwei Schnittpunkten P1 und P2 ist, wobei P1 der Schnittpunkt einer Referenzachse (R) mit dem zentralen Abschnitt (17) ist, und P2 der Schnittpunkt der Referenzachse (R) mit dem Umfangsabschnitt (19) ist, wobei die Referenzachse (R) an zwei Mittelpunkte Op und Oc angrenzt, wobei Op der Krümmungsmittelpunkt eines Fußes (5) an der Spitze (8) und Oc der Krümmungsmittelpunkt des zentralen Abschnitts (17) ist, wobei der zentrale Abschnitt (17) und der Umfangsabschnitt (19) durch Extrapolation verlängert werden können, um die Schnittpunkte P1 und P2 zu bestimmen.
  2. Behälter (1) nach Anspruch 1, bei dem das Verhältnis zwischen dem Durchmesser (B) des Aufstellkreises (10) und dem Durchmesser (A) der Peripherie (7) größer als 1/2 ist.
  3. Behälter (1) nach Anspruch 1 oder Anspruch 2, bei dem die Stufen (20) gemeinsam einen ersten Wendekreis (23), der durch die ersten Wendepunkte (21) verläuft, und einen zweiten Wendekreis (24), der durch die zweiten Wendepunkte (22) verläuft, definieren, wobei der Durchmesser (F) des ersten Wendekreises (23) kleiner als der Durchmesser (G) des zweiten Wendekreises (24) ist.
  4. Behälter (1) nach Anspruch 3, bei dem das Verhältnis zwischen dem Durchmesser (B) des Aufstellkreises (10) und dem Durchmesser (G) des zweiten Wendekreises (24) zwischen 1,3 und 0,7 beträgt.
  5. Behälter (1) nach einem der Ansprüche 3 oder 4, bei dem die Tangente an den ersten Wendepunkt (21) einen Winkel (α) mit einer Vertikalrichtung kleiner als der Winkel (β) bildet, der von der Tangente an den zweiten Wendepunkt (22) mit der Vertikalrichtung gebildet ist.
  6. Behälter (1) nach einem der vorhergehenden Ansprüche, bei dem der Boden (3) mit radialen Nuten (25) versehen ist, die sich entlang der Mulden (12) erstrecken.
  7. Behälter (1) nach einem der vorhergehenden Ansprüche, bei dem der Wert des Versatzes (E) und der Wert des ersten Krümmungsradius (C) derart sind, dass ihr Verhältnis E/C zwischen 1/100 und 1/25 beträgt.
  8. Behälter (1) nach Anspruch 7, bei dem das Verhältnis E/C ungefähr 1/50 beträgt.
  9. Behälter (1) nach einem der vorhergehenden Ansprüche, bei dem der zentrale Abschnitt (17) und der Umfangsabschnitt (19) nicht zusammenfallende Krümmungsmittelpunkte aufweisen.
  10. Behälter (1) nach einem der vorhergehenden Ansprüche, bei dem der zentrale Abschnitt (17) und der Umfangsabschnitt (19) unterschiedliche Krümmungsradien aufweisen.
EP12722768.4A 2011-04-12 2012-04-10 Blütenförmiger behälterboden mit doppelmulde Not-in-force EP2697125B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1153190A FR2974069B1 (fr) 2011-04-12 2011-04-12 Fond de recipient petaloide a double vallee
PCT/FR2012/050779 WO2012140358A1 (fr) 2011-04-12 2012-04-10 Fond de récipient pétaloïde à double vallée

Publications (2)

Publication Number Publication Date
EP2697125A1 EP2697125A1 (de) 2014-02-19
EP2697125B1 true EP2697125B1 (de) 2018-07-04

Family

ID=46147487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12722768.4A Not-in-force EP2697125B1 (de) 2011-04-12 2012-04-10 Blütenförmiger behälterboden mit doppelmulde

Country Status (5)

Country Link
US (1) US9623999B2 (de)
EP (1) EP2697125B1 (de)
CN (1) CN103547512B (de)
FR (1) FR2974069B1 (de)
WO (1) WO2012140358A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013110139B4 (de) * 2013-09-13 2025-11-06 Krones Ag Kunststoffbehältnis mit wärmestabilem Boden
USD792229S1 (en) 2014-08-01 2017-07-18 The Coca-Cola Company Bottle
EP3233645B1 (de) * 2014-12-19 2025-07-30 The Coca-Cola Company Verfahren zur herstellung einer basis für kohlensäurehaltige flaschengetränke.
FR3032946B1 (fr) * 2015-02-23 2017-02-10 Sidel Participations Recipient muni d'un fond mini petaloide a cannelures transversales
WO2019115535A1 (en) 2017-12-15 2019-06-20 Nestec S.A. Bottle, method of making the same and use of fdca and diol monomers in such bottle
DE102019119984A1 (de) * 2019-07-24 2021-01-28 Krones Ag Kunststoffbehältnis mit Zugbandgeometrie am Bodenbereich
JP7370300B2 (ja) * 2020-06-22 2023-10-27 サントリーホールディングス株式会社 プラスチックボトル
JP7370301B2 (ja) * 2020-06-22 2023-10-27 サントリーホールディングス株式会社 プラスチックボトル
DE102022120143A1 (de) * 2022-08-10 2024-02-15 Krones Aktiengesellschaft Kunststoffbehältnis mit Zugbandgeometrie am Bodenbereich

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249667A (en) * 1979-10-25 1981-02-10 The Continental Group, Inc. Plastic container with a generally hemispherical bottom wall having hollow legs projecting therefrom
EP0703152A1 (de) * 1994-09-09 1996-03-27 Hoover Universal,Inc. Einstückiger Kunststoffbehälter für kohlensäurehaltige Getränke

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Publication number Priority date Publication date Assignee Title
GB2098167A (en) * 1981-05-08 1982-11-17 Owens Illinois Inc Free-standing plastics containers
US4867323A (en) * 1988-07-15 1989-09-19 Hoover Universal, Inc. Blow molded bottle with improved self supporting base
US5454481A (en) * 1994-06-29 1995-10-03 Pan Asian Plastics Corporation Integrally blow molded container having radial base reinforcement structure
JP3612775B2 (ja) * 1995-03-28 2005-01-19 東洋製罐株式会社 耐熱耐圧自立容器及びその製造方法
US6019236A (en) * 1997-09-10 2000-02-01 Plastipak Packaging, Inc. Plastic blow molded container having stable freestanding base
FR2772720B1 (fr) * 1997-12-23 2000-03-17 Sidel Sa Recipient en matiere thermoplastique a fond petaloide
US5988416A (en) * 1998-07-10 1999-11-23 Crown Cork & Seal Technologies Corporation Footed container and base therefor
US6085924A (en) * 1998-09-22 2000-07-11 Ball Corporation Plastic container for carbonated beverages
US20060175283A1 (en) * 2005-01-28 2006-08-10 Graham Packaging Company, L.P. Plastic container with improved petaloidal base
FR2897292B1 (fr) 2006-02-16 2010-06-04 Sidel Participations 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
FR2932458B1 (fr) 2008-06-13 2010-08-20 Sidel Participations Recipient, notamment bouteille, en matiere thermoplastique equipe d'un fond renforce
DE102008047450A1 (de) * 2008-09-15 2010-04-15 Krones Ag Kunststoffbehältnis

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249667A (en) * 1979-10-25 1981-02-10 The Continental Group, Inc. Plastic container with a generally hemispherical bottom wall having hollow legs projecting therefrom
EP0703152A1 (de) * 1994-09-09 1996-03-27 Hoover Universal,Inc. Einstückiger Kunststoffbehälter für kohlensäurehaltige Getränke

Also Published As

Publication number Publication date
FR2974069B1 (fr) 2014-08-08
EP2697125A1 (de) 2014-02-19
WO2012140358A1 (fr) 2012-10-18
CN103547512B (zh) 2015-11-25
US9623999B2 (en) 2017-04-18
FR2974069A1 (fr) 2012-10-19
US20140103007A1 (en) 2014-04-17
CN103547512A (zh) 2014-01-29

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