EP2289809B1 - Base pour bouteilles sous pression - Google Patents

Base pour bouteilles sous pression Download PDF

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Publication number
EP2289809B1
EP2289809B1 EP10075356A EP10075356A EP2289809B1 EP 2289809 B1 EP2289809 B1 EP 2289809B1 EP 10075356 A EP10075356 A EP 10075356A EP 10075356 A EP10075356 A EP 10075356A EP 2289809 B1 EP2289809 B1 EP 2289809B1
Authority
EP
European Patent Office
Prior art keywords
base
bottle
standing ring
side wall
plastic bottle
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
EP10075356A
Other languages
German (de)
English (en)
Other versions
EP2289809A1 (fr
Inventor
Anthony J. Scott
John R. Ross
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.)
Amcor Rigid Packaging USA LLC
Original Assignee
Amcor Rigid Plastics USA LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Amcor Rigid Plastics USA LLC filed Critical Amcor Rigid Plastics USA LLC
Publication of EP2289809A1 publication Critical patent/EP2289809A1/fr
Application granted granted Critical
Publication of EP2289809B1 publication Critical patent/EP2289809B1/fr
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—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 present disclosure is directed to plastic bottles, and particularly to a supporting champagne style base that is unitary with the remainder of the bottle, which improves the perpendicularity of the bottle.
  • Plastic bottles that include a base having a continuous uninterrupted standing ring for supporting the bottle on any underlying surface are sometimes referred to having a champagne style base.
  • the perpendicularity or vertical alignment of such bottles can depend on the evenness of material distribution in the area of the standing ring, particularly when the bottles are subjected to even small internal pressures of 103.45 kP (15 psi; 775 torr) or less. While small variations from a true vertical alignment can be tolerated, any significant variation may cause problems in subsequent labeling and boxing of such bottles. While a large diameter standing ring is generally thought to provide enhanced stability as a result of the larger foot print, the large diameter standing ring is more flexible as a result of less material being present in the standing ring.
  • US Published Application 2004/0251258 discloses in Figs 22 and 23 a blow-molded thin wall plastic container "Ae" having a circular cross section with a neck 80, a shoulder 81, a body 82 and a bottom 83.
  • the bottom 83 includes a peripheral wall 88 and a bottom wall 89, of which the peripheral wall 88 is inclined by a predetermined angle and has its lower end 88a linked to grounding bottom edge wall 89a of the bottom wall 89 having an upwardly curved surface 89 at the center thereof.
  • the outer periphery of the grounding bottom edge wall 89a of the bottom wall 89 has a diameter remarkably smaller than that of the peripheral wall 85 of the body.
  • the lower end 88a of the peripheral wall 88 is so inclined as to be connected to the outer periphery of the grounding bottom edge wall 89a of the bottom wall 89.
  • the bottom 83 is distinguished by a transversal rib 91 arranged under the peripheral wall 88 of the bottom to surround the entire periphery of the container. Both the zone connecting the upper wall section 91a and the lower wall section 91 b of the transversal rib 91 and the zone connecting the upper wall section 91 a and the lower wall section 91 b show an arcuate profile.
  • the lower walls section 91 b of the transversal rib 91 and the peripheral wall 88 of the bottom define a predetermined angle.
  • the lower wall section 91 b of the transversal rib 91 is substantially vertical while the upper wall section 91 a is slightly inclined.
  • the wall thickness t1 of the lower end 88a of the peripheral wall 88 of the bottom is greater than the wall thickness t2 of the peripheral wall 85 of the body because the lower end 88a has a diameter and a blow ratio smaller than those of the peripheral wall 88.
  • the lower wall section 91 b of the transversal rib 91 is substantially vertical while the wall thickness of the transversal rib 91 is increased at and near the grounding bottom edge wall 89a of the bottom wall 89.
  • Japan Published Application JP 55 163 137 A discloses a bottle provided with a bottom structure similar to that of a champagne bottom in which the free standing properties of the bottle are secured by an annular portion 1 in contact with the ground and formed at the lower end of an outer peripheral wall portion 2.
  • a bottom wall portion is shown in Figs 1 , 2 , 4A and 4C as being inwardly inclined, and an inner peripheral wall portion in the form of a truncated cone is shown in Figs 2 , 4A and 4B .
  • the pressure resisting properties of the bottom are said to be secured by the truncated cone inner peripheral wall portion and a central portion of the bottom wall having a convex curved surface continuously formed thereabove.
  • the annular portion in contact with the ground has a small radius of curvature as shown in Figs 2 and 4A that can often exhibit insufficient biaxial orientation during molding.
  • the annular portion in contact with the ground is further expanded in Fig 4C into a semi-circular shape in cross-section to provide a larger radius of curvature.
  • the pressure resisting strength of the entire base decreases so that the central portion of the bottom is easily deformed due to the internal pressure from carbonated beverages, or the like.
  • a plastic bottle has a base centered on a vertical axis.
  • the base has a continuous standing ring to support the bottle on any underlying support surface.
  • a side wall is formed unitarily with the base and extends from the base upward to an upper end of the side wall.
  • a neck is unitarily connected to the upper end of the side wall that includes a finish adapted to receive a cap to close an opening into the bottle interior.
  • the bottle has a height defined by the distance between the opening and the standing ring, and a maximum width across the bottle.
  • the base standing ring is defined in vertical cross-section by a continuous curve.
  • the base standing ring has a diameter less than 80% of the maximum side wall width.
  • the continuous curve of the base standing ring is bounded on a radial outside by a conic section portion centered on the vertical axis.
  • the vertical alignment or perpendicularity of the bottle can be further enhanced by limiting the average standing ring thickness to between 1.0 and 1.3 times the thickness of the side wall, (claim 1), or the continuous curve of the base standing ring is bounded on a radial inside by an interior region that includes a plurality of concave domed wedge-shaped sections interspaced with buttress sections having substantially planar inclined outer portions, wherein the buttress sections have inclined outer portions that are inclined at an angle of between 8° and 16° with respect to a plane defined by the base standing ring (claim 2).
  • the vertical alignment or perpendicularity of the bottle can be enhanced by limiting the apex angle of the conic section portion to less than 160°.
  • the vertical alignment or perpendicularity of the bottle can be further enhanced by maintaining the width of the conic section portion to at least 0.889 cm (0.035 inches).
  • the vertical alignment or perpendicularity of the bottle can also be enhanced by limiting the standing ring diameter to be more than 70% of the maximum bottle side wall width.
  • the vertical alignment or perpendicularity of the bottle can be further enhanced by limiting variation in the standing ring thickness to less than ⁇ 20%.
  • Another feature of the base that can improve the vertical alignment or perpendicularity of the bottle is confining the vertical cross-sectional radius defining the standing ring to between 0.254 cm and 0.762 cm (0.100 inches and 0.300 inches).
  • Another feature of the base that can improve the vertical alignment or perpendicularity of the bottle is limiting the curvature of the concave dome portion to a radius of at least 1.0 times the standing ring diameter.
  • the vertical alignment or perpendicularity of the bottle can be further enhanced by providing the angle of tangency at the point of intersection of the concave dome portion and the standing ring vertical cross-section to be at least 45°.
  • Fig 1 is a sectional outline of an exterior surface of a bottle.
  • Fig 2 is a bottom plan view of the base of the bottle in Fig 1 .
  • Fig 3 is a sectional outline view of the base taken along line 3 - 3 of Fig 2 .
  • Fig 4 is an enlarged view of a portion of the left side of Fig 3 .
  • Fig 5 is an enlarged view of a portion of the right side of Fig 3 .
  • a bottle 10 is shown in Fig 1 and the other Figs that has a generally cylindrical body 12 surrounding a longitudinal axis Y and a closed base 1 that is unitary with the remainder of the bottle.
  • the 14 base has a continuous standing ring 16 to support the bottle 10 on any underlying support surface.
  • the standing ring 16 has a standing ring diameter D.
  • a side wall 18 is formed unitarily with the base 14 and extends from the base upward to an upper end 20 of the side wall 18.
  • a neck 22 is unitarily connected to the upper end 20 of the side wall 18 by a shoulder portion 21.
  • the neck 22 includes a finish 24 adapted to receive a cap (not shown) to close an opening 26 into the bottle interior 28.
  • the bottle 10 has a height H defined by the distance between the opening 26 and the standing ring 16, and a maximum width W across the bottle 10.
  • the base standing ring 16 is defined in vertical cross-section by a continuous curve of radius R s , shown in Figs 4 and 5 , which can be between 0.254 cm and 0.762 cm (0.100 inches and 0.300 inches).
  • the radius R S is independent of the standing ring diameter D, where the standing ring diameter D is measured at the lowest point on the standing ring 16.
  • the curve defining the standing ring 16, being continuous, does not include any flattened portion in the plane X defined by the standing ring, shown in Fig 3 .
  • the base standing ring 16 has a diameter D less than 80% of the maximum side wall width W.
  • the base standing ring 16 can have a diameter D greater than 70% of the maximum side wall width W.
  • the continuous curve of the base standing ring 16 defined by R S is bounded on a radial inside, starting about at point or ring 30, by an interior region 32.
  • the interior region 32 can include a plurality of concave domed wedge-shaped sections 34 as seen in Fig 2 .
  • the concave domed wedge-shaped sections 34 can be formed by a constant inside radius R C of at least 1.0 times the standing ring diameter D as shown in Figs 3 and 5 .
  • the angle of tangency at the point of intersection 30 of the concave dome portions 34 and the curve defining the standing ring 16 measured from the plane X as shown in Fig 5 can be between 45° and 55°.
  • the wedge-shaped sections 34 can be interspaced with buttress sections 36, which can also be wedge-shaped.
  • the buttress sections 36 can have substantially planar inclined outer portions 38.
  • the planar outer portions 38 can be inclined at an angle ⁇ of between 8° and 16° with respect to a plane X defined by the base standing ring 16 as seen in Fig 4 .
  • the buttress sections 36 can include inner portions 40 defined by a concave surface 42 that becomes circumferentially continuous as it approaches a central downwardly protruding portion 44 surrounding the axis Y of the bottle.
  • the lowest surface of the downwardly protruding section 44 can be spaced above the plane X by a distance H C of 14% to 20% of the standing ring diameter D.
  • the continuous curve of the base standing ring 16 defined by radius R S is bounded on a radial outside by a conic section portion 46 starting at point or ring 48 and extending linearly upwardly and outwardly to point or ring 50 as shown in Figs 4 and 5 .
  • the distance between point or ring 48 and point or ring 50 defines the width of the conic section portion 46, which is preferably at least 0.089 cm (0.035 inches).
  • the conic section portion 46 is seen to be generated by the rotation around the vertical axis Y of a line generating a conic section having an included apex angle ⁇ of less than 160° as shown in Fig 3 .
  • a base outer portion 52 extending outward from point 50 to the side wall 18 can be formed as a torus segment defined by a constant radius R T of between about 12% and 20% of the standing ring diameter D.
  • the material forming the standing ring 16 preferably has an average thickness of between 1.0 and 1.3 times the thickness of the material forming the side wall 18. Between the point or ring 30 and the point or ring 48, the thickness of the material forming the standing ring 16 desirably has a variation that is as small as possible and less than ⁇ 20%.
  • a bottle 10 as shown in Fig 1 can have a height H of 22.39 cm (8.813 inches) and a maximum width W of 6.40 cm (2.52 inches).
  • the standing ring diameter D of the example bottle can be 4.826 cm (1.90 inches).
  • the vertical cross-section radius R S defining the exterior surface of the standing ring 16 of the example bottle can be 0.381 cm (0.150 inches.
  • the width of the conic section portion 46 of the example bottle can be 0.163 cm (0.064 inches).
  • the average thickness of the material forming the side wall 16 of the example bottle can be 0.0356 cm (0.014 inches) while the average thickness of the material forming the standing ring can be 0.0406 cm (0.016 inches).
  • the inside radius R C forming the concave surfaces of the domed wedge-shaped sections 34 of the example bottle can be 5.055 cm (1.990 inches).
  • the angle of tangency at the point of intersection 30 of the concave dome portions 34 and the curve defining the standing ring 16 measured from the plane X in the example bottle can be 50°.
  • the angle of inclination ⁇ of the planar outer portions 38 of the buttress sections 36 of the example bottle can be 11°.
  • the radius R C defining the concave surface 40 of the example bottle can be 0.668 cm (0.263 inches).
  • the lowest surface of the central downwardly protruding portion 44 of the example bottle can be spaced above the plane X by a distance of 0.800 cm (0.315 inches).
  • the apex angle ⁇ of the conic section generating the portion 46 of the example bottle can be 150°.
  • the radius R T forming the base outer portion 52 of the example bottle can be 0.762 cm (0.300 inches).
  • the example bottle showed a 36% improvement in perpendicularity over a prior design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Claims (9)

  1. Bouteille en matière plastique (10) incluant une base (14) centrée sur un axe vertical (Y), la base comportant une bague d'assise (16) pour supporter la bouteille sur une quelconque surface de support sous-jacente, une paroi latérale (18) formée d'un seul tenant avec la base et s'étendant depuis la base vers le haut jusqu'à une extrémité supérieure (20) de la paroi latérale, et un col (22) connecté à l'extrémité supérieure de la paroi latérale, le col incluant une finition (24) adaptée pour recevoir un bouchon pour fermer une ouverture dans l'intérieur de bouteille, la bouteille présentant une hauteur (H) définie par la distance entre l'ouverture et la bague d'assise , et une largeur maximum (W) sur la paroi latérale, la bague d'assise de base étant définie en coupe verticale par une courbe continue délimitée sur un intérieur radial par une région intérieure (32), la courbe continue étant délimitée sur un extérieur radial par une partie de section conique (46) centrée sur l'axe vertical, la bague d'assise de base présentant un diamètre (D) inférieur à 80% de la largeur de paroi latérale maximum, et caractérisée en ce que la bague d'assise (16) présente une épaisseur moyenne qui vaut entre 1,0 et 1,3 fois l'épaisseur moyenne de la paroi latérale (18).
  2. Bouteille en matière plastique (10) incluant une base (14) centrée sur un axe vertical (Y), la base comportant une bague d'assise (16) pour supporter la bouteille sur une quelconque surface de support sous-jacente, une paroi latérale (18) formée d'un seul tenant avec la base et s'étendant depuis la base vers le haut jusqu'à une extrémité supérieure (20) de la paroi latérale, et un col (22) connecté à l'extrémité supérieure de la paroi latérale, le col incluant une finition (24) adaptée pour recevoir un capuchon pour fermer une ouverture (26) dans l'intérieur de bouteille, la bouteille présentant une hauteur (H) définie par la distance entre l'ouverture et la bague de verticalisation, et une largeur maximum (W) sur la paroi latérale, la bague d'assise de base étant définie en coupe verticale par une courbe continue délimitée sur un intérieur radial par une région intérieure (32), la région intérieure comprend une partie en forme de dôme concave, la courbe continue étant délimitée sur un extérieur radial par une partie de section conique (46) centrée sur l'axe vertical, la bague d'assise de base présentant un diamètre (D) inférieur à 80% de la largeur de paroi latérale maximum et caractérisée en ce que la partie en forme de dôme concave comporte une pluralité de sections en forme de coin en dôme concave (34) imbriquée avec des sections de renfort (36) et en ce que les sections de renfort comportent des parties externes inclinées sensiblement planes (38) inclinées selon un angle (θ) entre 8° et 16° par rapport à un plan (X) défini par la bague d'assise de base.
  3. Bouteille en matière plastique selon la revendication 1 ou 2, dans laquelle le diamètre de bague d'assise de base (D) est supérieur à 70% de la largeur de paroi latérale maximum (W).
  4. Bouteille en matière plastique selon l'une quelconque des revendication 2 ou 3, dans laquelle la bague d'assise (16) présente une épaisseur moyenne qui se situe entre 1,0 et 1,3 fois l'épaisseur moyenne de la paroi latérale (18).
  5. Bouteille en matière plastique selon l'une quelconque des revendications 1 à 4, dans laquelle la variation en épaisseur sur la circonférence de la bague d'assise (16) est inférieure à ± 20%.
  6. Bouteille en matière plastique selon l'une quelconque des revendications 1 à 5, dans laquelle la courbe continue de la bague d'assise présente un rayon de définition (RS) en coupe verticale entre 2,54 mm (0,100 pouce) et 7,62 mm (0,300 pouce).
  7. Bouteille en matière plastique selon l'une quelconque des revendications 2 à 6, dans laquelle les sections en forme de coin en dôme concave (34) sont définies par une courbe (RC) présentant un rayon d'au moins 1,0 fois le diamètre de bague d'assise (D).
  8. Bouteille en matière plastique selon l'une quelconque des revendications 1 à 7, dans laquelle la partie de section conique (46) à l'extérieur de la bague d'assise de base (16) présente une largeur entre 0,889 (0,035 pouce) et 2,413 mm (0,095 pouce).
  9. Bouteille en matière plastique selon l'une quelconque des revendications 1 à 8, dans laquelle la partie de section conique (46) présente un angle d'apex (Φ) inférieur à 160°.
EP10075356A 2009-09-01 2010-08-19 Base pour bouteilles sous pression Not-in-force EP2289809B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/552,025 US20110049083A1 (en) 2009-09-01 2009-09-01 Base for pressurized bottles

Publications (2)

Publication Number Publication Date
EP2289809A1 EP2289809A1 (fr) 2011-03-02
EP2289809B1 true EP2289809B1 (fr) 2012-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10075356A Not-in-force EP2289809B1 (fr) 2009-09-01 2010-08-19 Base pour bouteilles sous pression

Country Status (3)

Country Link
US (1) US20110049083A1 (fr)
EP (1) EP2289809B1 (fr)
AT (1) ATE552177T1 (fr)

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CN104097822B (zh) * 2013-04-10 2018-05-01 克朗斯机械（太仓）有限公司 具有柔性基座段的塑料瓶

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US20110049083A1 (en) 2011-03-03
EP2289809A1 (fr) 2011-03-02

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