US20110049083A1 - Base for pressurized bottles - Google Patents
Base for pressurized bottles Download PDFInfo
- Publication number
- US20110049083A1 US20110049083A1 US12/552,025 US55202509A US2011049083A1 US 20110049083 A1 US20110049083 A1 US 20110049083A1 US 55202509 A US55202509 A US 55202509A US 2011049083 A1 US2011049083 A1 US 2011049083A1
- Authority
- US
- United States
- Prior art keywords
- standing ring
- base
- bottle
- 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.)
- Abandoned
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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
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)
Abstract
A plastic bottle with a base centered on a vertical axis, a continuous standing ring to support the bottle, a side wall formed unitarily with the base extending from the base upward to an upper side wall end, and a neck connected to the side wall upper end, the neck including a finish adapted to receive a cap to close an opening into the bottle interior. The bottle base standing ring is defined in vertical cross-section by a continuous curve bounded on a radial inside by an interior region that can include a plurality of concave domed wedge-shaped sections interspaced with buttress sections having substantially planar inclined outer portions. The bottle base standing ring has a diameter less than 80% of the maximum side wall width and is bounded on a radial outside by a conic section portion centered on the vertical axis having an apex angle of less than 1600 to improve the perpendicularity of the bottle.
Description
- 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 15 psi 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. As a result, even small variations in material distribution in large diameter standing rings can lead to unacceptable variations in the vertical alignment or perpendicularity of the bottle. This problem has in the past been addressed by forming a preform with significant non-uniform wall thicknesses so that a substantial amount of material is placed in the chime in direct alignment with the standing ring. Examples are to be found in U.S. Pat. Nos. 4,725,464; 4,780,257; 4,889,752 and 6,248,413.
- A significant disadvantage of using preforms having significant non-uniform wall thicknesses to place additional material in the chime in direct alignment with the standing ring is the additional polymer itself, which increases the cost of the bottle. There is thus a need for a lower-cost solution to enhance the perpendicularity or vertical alignment of blow molded plastic bottles having a champagne style base.
- 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. To enhance the vertical alignment or perpendicularity of the bottle, the base standing ring can be defined in vertical cross-section by a continuous curve. The base standing ring can have a diameter less than 80% of the maximum side wall width. The continuous curve of the base standing ring can be 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. The continuous curve of the base standing ring can be 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 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 0.035 inches (0.889 cm).
- 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 the average standing ring thickness to between 1.0 and 1.3 times the thickness of the side wall. 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 0.100 inches (0.254 cm) and 0.300 inches (0.762 cm).
- 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 buttress sections that have inclined outer portions that can be inclined at an angle of between 8° and 16° with respect to a plane defined by the base standing ring. 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°.
- Other features of the present bottle base and the corresponding advantages of those features will become apparent from the following discussion of the preferred embodiments of the present container, exemplifying the best mode of practice, which is illustrated in the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the features. Moreover, in the figures, like referenced numerals designate corresponding parts throughout the different views.
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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 inFIG. 1 . -
FIG. 3 is a sectional outline view of the base taken along line 3-3 ofFIG. 2 . -
FIG. 4 is an enlarged view of a portion of the left side ofFIG. 3 . -
FIG. 5 is an enlarged view of a portion of the right side ofFIG. 3 . - A
bottle 10 is shown inFIG. 1 and the other Figs that has a generallycylindrical body 12 surrounding a longitudinal axis Y and aclosed base 14 that is unitary with the remainder of the bottle. The 14 base has acontinuous standing ring 16 to support thebottle 10 on any underlying support surface. The standingring 16 has a standing ring diameter D.A side wall 18 is formed unitarily with thebase 14 and extends from the base upward to anupper end 20 of theside wall 18. Aneck 22 is unitarily connected to theupper end 20 of theside wall 18 by ashoulder portion 21. Theneck 22 includes afinish 24 adapted to receive a cap (not shown) to close anopening 26 into thebottle interior 28. Thebottle 10 has a height H defined by the distance between theopening 26 and the standingring 16, and a maximum width W across thebottle 10. - To enhance the vertical alignment or perpendicularity of the
bottle 10, thebase standing ring 16 can be defined in vertical cross-section by a continuous curve of radius RS, shown inFIGS. 4 and 5 , which can be between 0.100 inches (0.254 cm) and 0.300 inches (0.762 cm). The radius RS is independent of the standing ring diameter D, where the standing ring diameter D is measured at the lowest point on the standingring 16. The curve defining the standingring 16, being continuous, does not include any flattened portion in the plane X defined by the standing ring, shown inFIG. 3 . Thebase standing ring 16 can have a diameter D less than 80% of the maximum side wall width W. Thebase 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 RS can be bounded on a radial inside, starting about at point orring 30, by aninterior region 32. Theinterior region 32 can include a plurality of concave domed wedge-shapedsections 34 as seen inFIG. 2 . The concave domed wedge-shapedsections 34 can be formed by a constant inside radius RC of at least 1.0 times the standing ring diameter D as shown inFIGS. 3 and 5 . The angle of tangency λ at the point ofintersection 30 of theconcave dome portions 34 and the curve defining the standingring 16 measured from the plane X as shown inFIG. 5 can be between 45°and 55°. The wedge-shapedsections 34 can be interspaced with buttresssections 36, which can also be wedge-shaped. The buttresssections 36 can have substantially planar inclinedouter portions 38. The planarouter portions 38 can be inclined at an angle θ of between 8° and 16° with respect to a plane X defined by thebase standing ring 16 as seen inFIG. 4 . The buttresssections 36 can includeinner portions 40 defined by aconcave surface 42 that becomes circumferentially continuous as it approaches a central downwardly protrudingportion 44 surrounding the axis Y of the bottle. The lowest surface of the downwardly protrudingportion 44 can be spaced above the plane X by a distance HC of 14% to 20% of the standing ring diameter D. - The continuous curve of the
base standing ring 16 defined by radius RS can be bounded on a radial outside by aconic section portion 46 starting at point orring 48 and extending linearly upwardly and outwardly to point orring 50 as shown inFIGS. 4 and 5 . The distance between point orring 48 and point orring 50 defines the width of theconic section portion 46, which is preferably at least 0.035 inches (0.089 cm). Theconic 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 Φ of less than 160° as shown inFIG. 3 . A baseouter portion 52 extending outward frompoint 50 to theside wall 18 can be formed as a torus segment defined by a constant radius RT of between about 12% and 20% of the standing ring diameter D. - Between the point or
ring 30 and the point orring 48, the material forming the standingring 16 preferably has an average thickness of between 1.0 and 1.3 times the thickness of the material forming theside wall 18. Between the point orring 30 and the point orring 48, the thickness of the material forming the standingring 16 desirably has a variation that is as small as possible and less than ±20%. - By way of example, a
bottle 10 as shown inFIG. 1 can have a height H of 8.813 inches (22.39 cm) and a maximum width W of 2.52 inches (6.40 cm). The standing ring diameter D of the example bottle can be 1.90 inches (4.826 cm). The vertical cross-section radius RS defining the exterior surface of the standingring 16 of the example bottle can be 0.150 inches (0.381 cm). The width of theconic section portion 46 of the example bottle can be 0.064 inches (0.163 cm). The average thickness of the material forming theside wall 16 of the example bottle can be 0.014 inches (0.0356 cm) while the average thickness of the material forming the standing ring can be 0.016 inches (0.0406 cm). The inside radius RC forming the concave surfaces of the domed wedge-shapedsections 34 of the example bottle can be 1.990 inches (5.055 cm). The angle of tangency λ at the point ofintersection 30 of theconcave dome portions 34 and the curve defining the standingring 16 measured from the plane X in the example bottle can be 50°. The angle of inclination θ of the planarouter portions 38 of the buttresssections 36 of the example bottle can be 11°. The radius RC defining theconcave surface 40 of the example bottle can be 0.263 inches (0.668 cm). The lowest surface of the central downwardly protrudingportion 44 of the example bottle can be spaced above the plane X by a distance of 0.315 inches (0.800 cm). The apex angle Φ of the conic section generating theportion 46 of the example bottle can be 150°. The radius RT forming the baseouter portion 52 of the example bottle can be 0.300 inches (0.762 cm). The example bottle showed a 36% improvement in perpendicularity over a prior design. - While these features have been disclosed in connection with the illustrated preferred embodiment, other embodiments of the invention will be apparent to those skilled in the art that come within the spirit of the invention as defined in the following claims.
Claims (20)
1. A plastic bottle comprising a base centered on a vertical axis, the base having a standing ring to support the bottle on any underlying support surface, a side wall formed unitarily with the base and extending from the base upward to an upper end of the side wall, and a neck connected to the upper end of the side wall, the neck including a finish adapted to receive a cap to close an opening into the bottle interior, the bottle having a height defined by the distance between the opening and the standing ring, and a maximum width across the side wall, the base standing ring being defined in vertical cross-section by a continuous curve, the continuous curve being bounded on a radial inside by an interior region, the continuous curve being bounded on a radial outside by a conic section portion centered on the vertical axis, the base standing ring having a diameter less than 80% of the maximum side wall width.
2. The plastic bottle of claim 1 , wherein the conic section portion has an apex angle of less than 160°.
3. The plastic bottle of claim 1 , wherein the base standing ring diameter is more than 70% of the maximum side wall width.
4. The plastic bottle of claim 1 , wherein the standing ring has an average thickness that is between 1.0 and 1.3 times the average thickness of the side wall.
5. The plastic bottle of claim 4 , wherein the variation in standing ring thickness is less than ±20%.
6. The plastic bottle of claim 1 , wherein the continuous curve of the standing ring has a defining radius in vertical cross-section of between 0.100 inches and 0.300 inches.
7. The plastic bottle of claim 1 , wherein the interior region comprises a plurality of concave domed wedge-shaped sections interspaced with buttress sections having substantially planar inclined outer portions.
8. The plastic bottle of claim 7 , wherein the concave dome portion is defined by a curve having a radius of at least 1.0 times the standing ring diameter.
9. The plastic bottle of claim 7 , wherein the planar inclined outer portions of the buttress sections are inclined at an angle of between 8° and 16° with respect to a plane defined by the base standing ring.
10. The plastic bottle of claim 7 , wherein the angle of tangency at the point of intersection of the concave dome portion and the curve defining the standing ring measured from the plane defined by the standing ring is between 45° and 55°.
11. A plastic bottle comprising a base centered on a vertical axis, the base having a continuous circular standing ring to support the bottle on any underlying support surface, a cylindrical side wall formed unitarily with the base and extending from the base upward to an upper end of the side wall, and a neck connected to the upper end of the side wall, the neck including a finish adapted to receive a cap to close an opening into the bottle interior, the bottle having a height defined by the distance between the opening and the standing ring, and a maximum diameter across the side wall, the base standing ring being defined in vertical cross-section by a continuous curve of constant radius having a diameter of between 70% and 80% of the maximum side wall diameter, the continuous curve of the standing ring being bounded on a radial inside by an interior region, the continuous curve of the standing ring being bounded on a radial outside by a constant angle tapered portion defined by a conic section centered on the vertical axis having an apex angle of less than 160°.
12. The plastic bottle of claim 11 , wherein the standing ring has an average thickness that is between 1.0 and 1.3 times the average thickness of the side wall and the variation in standing ring thickness is less than ±20%.
13. The plastic bottle of claim 11 , wherein the continuous curve of the standing ring has a defining radius in vertical cross-section of between 0.100 inches and 0.300 inches.
14. The plastic bottle of claim 11 , wherein the interior region comprises a concave domed shaped portion.
15. The plastic bottle of claim 14 , wherein the concave domed shaped portion includes a plurality of concave domed wedge-shaped sections interspaced with buttress sections having substantially planar inclined outer portions.
16. The plastic bottle of claim 15 , wherein the buttress sections planar inclined outer portions are inclined at an angle of between 8° and 16° with respect to a plane defined by the base standing ring.
17. The plastic bottle of claim 14 , wherein the concave dome portion is defined by a curve having a radius of at least 1.0 times the standing ring diameter.
18. The plastic bottle of claim 14 , wherein the angle of tangency at the point of intersection of the concave dome portion and the curve defining the standing ring measured from the plane defined by the standing ring is between 45°and 55°.
19. The plastic bottle of claim 11 , wherein the constant angle tapered portion outside the base standing ring has a width of between 0.035 inches and 0.095 inches.
20. A plastic bottle comprising a base centered on a vertical axis, the base having a continuous circular standing ring to support the bottle on any underlying support surface, a cylindrical side wall formed unitarily with the base and extending from the base upward to an upper end of the side wall, and a neck connected to the upper end of the side wall, the neck including a finish adapted to receive a cap to close an opening into the bottle interior, the bottle having a height defined by the distance between the opening and the standing ring, and a maximum diameter across the side wall, the base standing ring having a diameter of between 70% and 80% of the maximum side wall diameter, the base standing ring being defined in vertical cross-section by a continuous curve of constant radius of between 0.100 inches and 0.300 inches, the continuous curve of the standing ring being bounded on a radial inside by an interior region that includes a plurality of concave domed wedge-shaped sections defined by a curve having a radius of at least 1.0 times the standing ring diameter, the concave domed wedge-shaped sections intersecting the continuous curve of the standing ring at an angle of tangency measured from a plane defined by the base standing ring of between 45° and 55°, the plurality of concave domed wedge-shaped sections being interspaced with wedge-shaped buttress sections having substantially planar outer portions inclined at an angle of between 8° and 16° with respect to the plane defined by the base standing ring, the continuous curve of the standing ring being bounded on a radial outside by a constant angle tapered portion defined by a conic section centered on the vertical axis having an apex angle of less than 160° and having a width of between 0.035 inches and 0.095 inches.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/552,025 US20110049083A1 (en) | 2009-09-01 | 2009-09-01 | Base for pressurized bottles |
AT10075356T ATE552177T1 (en) | 2009-09-01 | 2010-08-19 | BASE FOR PRESSURE BOTTLES |
EP10075356A EP2289809B1 (en) | 2009-09-01 | 2010-08-19 | Base for pressurized bottles |
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 (1)
Publication Number | Publication Date |
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US20110049083A1 true US20110049083A1 (en) | 2011-03-03 |
Family
ID=43127269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/552,025 Abandoned US20110049083A1 (en) | 2009-09-01 | 2009-09-01 | Base for pressurized bottles |
Country Status (3)
Country | Link |
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US (1) | US20110049083A1 (en) |
EP (1) | EP2289809B1 (en) |
AT (1) | ATE552177T1 (en) |
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Also Published As
Publication number | Publication date |
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ATE552177T1 (en) | 2012-04-15 |
EP2289809A1 (en) | 2011-03-02 |
EP2289809B1 (en) | 2012-04-04 |
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Legal Events
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AS | Assignment |
Owner name: BALL CORPORATION, COLORADO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCOTT, ANTHONY J.;ROSS, JOHN R.;REEL/FRAME:023188/0666 Effective date: 20090825 |
|
AS | Assignment |
Owner name: AMCOR RIGID PLASTICS USA, INC., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BALL CORPORATION;REEL/FRAME:026298/0137 Effective date: 20110407 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |