US20150158624A1 - Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink - Google Patents
Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink Download PDFInfo
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- US20150158624A1 US20150158624A1 US14/622,499 US201514622499A US2015158624A1 US 20150158624 A1 US20150158624 A1 US 20150158624A1 US 201514622499 A US201514622499 A US 201514622499A US 2015158624 A1 US2015158624 A1 US 2015158624A1
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- Prior art keywords
- bottle
- side wall
- support legs
- diameter
- flexed
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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
- B65D1/12—Cans, casks, barrels, or drums
- B65D1/14—Cans, casks, barrels, or drums characterised by shape
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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
- B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
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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
- B65D1/12—Cans, casks, barrels, or drums
- B65D1/14—Cans, casks, barrels, or drums characterised by shape
- B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
- B65D1/165—Cylindrical cans
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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
- B65D1/40—Details of walls
Definitions
- the present invention relates generally to a can bottle in a bottomed, cylindrical configuration, and a can product that is filled up therein with a soft or hard drink, and sealed up with a lid, and specifically to a can bottle with its bottom having such morphological features that the rigidity of the bottom can be maintained even when it is made thinner than ever before and the freestanding capability of the can bottle is ensured even as the internal pressure rises, and a soft or hard drink can product. More specifically, the invention relates to a can bottle provided with a bottom having just only these morphological features but also a feature that is capable of preventing inward slippage of legs and enhancing buckling strength to vertical loads, and a soft or hard drink can product.
- the central portion of the bottom is domed in such a way as to make its way into the can bottle as described above, and the thickness of the bottom is set by far larger than that of the can shank forming the side wall of the can bottle.
- JP-T 2002-515842 shows that for the main purpose of reducing the thickness of the metal material of a can bottom wall, there is a bottom wall provided, in which an outwardly convex dome is provided, and a plurality of support legs, each of a substantially truncated quadrangular shape, are formed on that dome, and alternately located at spaces in a circumferential direction, extending down from the dome.
- the first idea (aspect) of the invention has for its object to provide a can bottle having a bottom that enables its rigidity to be maintained even when the bottom is made thin, and make sure the freestanding capability of the can bottle as the internal pressure rises, and a soft or hard drink can product using that can bottle.
- the second idea (aspect) of the invention is an improvement in the first aspect of the invention, having for its object to provide a can bottle having a bottom configuration capable of increasing buckling strength to vertical loads, and a soft or hard drink can product using that can bottle.
- a problem with a metal can having a so-called petaloid bottom configuration is that when there is a vertical load applied in the axial direction of the can bottle, the legs slip down toward the central portion of the bottom, deforming and starting to buckle up.
- the main purpose of the second aspect of the invention is to provide a solution to that problem.
- the inventors have made study after study of a variety of parameters including leg height, the radius of curvature of the domed portion, and can diameter in particular, and found that processing limits to metal materials in general and aluminum in particular impose some restrictions on increasing leg height L, and in order to make sure the freestanding capability of the can bottle, the relation of the radius of curvature of the domed portion to the magnitude of can diameter is of vital importance.
- Such findings have underlain the invention of this application.
- the first aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein said bottom satisfies a condition: 1.04 ⁇ R 3 /D ⁇ 1.67 where R 3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
- the diameter D (mm) of the cylindrical side wall is set at 52 to 95 mm.
- each flexed support leg is set in such a way as to satisfy 0.12 ⁇ L/D ⁇ 0.18 where D (mm) is the diameter of the side wall.
- the bottom has an average thickness t (mm) enough to satisfy 0.0030 ⁇ t/D ⁇ 0.0045 where D (mm) is the diameter of the side wall.
- the domed portions are defined by a gap between adjacent flexed support legs, and a central portion of the bottom surrounded by a plurality of flexed support legs.
- the plurality of flexed support legs are located and constructed in a petaloid configuration.
- a soft or hard drink can product of the invention is formed by filling a drink up in the can bottle in a bottomed, cylindrical configuration, and then sealing an opening with a lid.
- the internal pressure of the can is set at up to 640 kPa.
- the drink is a carbonated drink.
- the first aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein said bottom satisfies a condition: 1.04 ⁇ R 3 /D ⁇ 1.67 where R 3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
- the second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction.
- the grounding sites of the flexed support legs at the bottom define the most extended positions of the flexed support legs, and the ribs are formed in a direction crossing a radial line of flexion passing through said positions.
- said ribs are formed such that there are two or more grounding points provided at the can bottle's bottom per one flexed support leg.
- said ribs are formed such that said ribs per se each define two or more grounding points at the can bottle's bottom.
- said ribs are each configured into a concavely dented shape as viewed in cross section in the radial section passing through the most extended position of the flexed support leg.
- each or the rib is configured in an elongated, dented groove shape.
- another rib is added to and formed at the most extended position of the flexed support leg at said bottom such that two ribs cross each other at the most extended position.
- said two ribs are provided in such a way as to cross each other, whereby there are four grounding points provided at the can bottle's bottom per one flexed support leg.
- said bottom satisfies a condition: 1.04 ⁇ R 3 /D ⁇ 1.67 where R 3 (mm) is the radius of curvature that defines the curvature of the domed portion, and D (mm) is the diameter of the cylindrical side wall.
- the diameter D (mm) of the cylindrical side wall is set at 52 to 95 mm.
- the height L (mm) of each or the flexed support leg is provided in such a way as to satisfy 0.12 ⁇ L/D ⁇ 0.18 where D (mm) is the diameter of the side wall.
- the bottom has an average thickness t (mm) enough to satisfy 0.0030 ⁇ t/D ⁇ 0.0045 where D (mm) is the diameter of the side wall.
- the domed portions are defined by a gap between adjacent flexed support legs, and a central portion of the bottom surrounded by a plurality of flexed support legs.
- the plurality of flexed support legs are located and constructed in a petaloid configuration.
- a soft or hard drink can product of the invention is formed by filling a drink up in the can bottle in a bottomed, cylindrical configuration, and then sealing an opening with a lid.
- the internal pressure of the can is set at up to 640 kPa.
- the drink is a carbonated drink.
- the second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material having a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction.
- the arrangement being like this, even when the bottom of the can bottle is thinned, it is possible to maintain the rigidity of that bottom. In particular, it is possible to prevent inward slippage of the legs, resulting in the ability to make buckling strength to vertical loads much higher.
- the inventive ribs are provided at given sites of the bottom, when there is a vertical load applied in the axial direction, it is possible to prevent inward slippage of the legs, and keep the central portion of the bottom against rising. These preventive actions contribute much more to improvements in buckling strength to vertical loads.
- FIG. 1 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction.
- FIG. 2 is a schematically enlarged perspective view of the bottom of the inventive can bottle in a bottomed, cylindrical configuration.
- FIG. 3 is a schematically enlarged perspective view, as in FIG. 2 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines.
- FIG. 4 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet, and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized.
- FIG. 5 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet, and the flexed support legs are arranged uniformly in the radial direction.
- a solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively. That is, the dotted line is indicative of the drink can product that is being pressurized or a positive pressure can.
- FIG. 6 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction.
- FIG. 7 is a schematically enlarged perspective view of the bottom of the inventive can bottle in a bottomed, cylindrical configuration.
- FIG. 8 is a schematically enlarged perspective view, as in FIG. 7 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines: the bump form at the bottom in general, and one preferable form of the ribs in particular that is part of the invention is clearly shown. Note here that one rib is shown in partial section.
- FIG. 9 is a schematically enlarged perspective view of the bottom in a modification to FIG. 8 , wherein there are 8 flexed support legs provided.
- FIG. 10 is a schematically enlarged perspective view of the bottom in a modification to FIG. 9 , wherein there are two ribs crossing each other at the most extended position.
- FIG. 11 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized.
- FIG. 12 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction.
- a solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively. That is, the dotted line is indicative of the drink can product that is being pressurized or a positive pressure can.
- the can bottle in a bottomed, cylindrical configuration according to the first aspect of the invention, and a drink can product obtained by filling a drink in that can bottle and sealing it with a lid will now be explained in further details.
- FIG. 1 is a schematically perspective view of the inventive can bottle in a bottomed, cylindrical configuration, as viewed from the bottom direction;
- FIG. 2 is a schematically enlarged perspective view of the bottom of the can bottle;
- FIG. 3 is a schematically enlarged perspective view, similar to FIG. 1 , of the bottom wherein the morphological image of a bump-and-dip arrangement is indicated by lines;
- FIG. 4 is a schematically sectional view of the bottom of the inventive can bottle before pressurized, wherein four (or six or eight) flexed support legs are provided such that their sections appear uniformly at both ends of the drawing sheet, and they are uniformly arranged in the radial direction;
- FIG. 5 is illustrative in schematic and section, as in FIG. 4 , of how the bottom of the can bottle deforms as it is pressurized (the state of a positive pressure can).
- downward or “down” means a direction toward the bottom of a can bottle when it is in an upright posture. In other words, when the can bottle is being held up, that term is defined as a direction in which the can bottle is placed upright on the bottom side. The opposite direction is “upward” or “up”.
- the inventive can bottle 1 is formed of a metal material such as aluminum in a bottomed, cylindrical configuration comprising a cylindrical side wall 20 (the so-called can shank) and a bottom 30 joined to and integrated with that side wall 20 .
- a lid seal material such as a can lid (not shown) may be tightly sealed and fitted.
- the bottom 30 of the can bottle includes, and is constructed from, domed portions 31 that flex and extend downwardly and outwardly, and a plurality of flexed (or curved) support legs 35 that are formed by extending a plurality of peripheral sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion.
- the configuration in which a plurality of flexed support legs 35 are positioned and constructed like a petal is sometimes called the petaloid configuration.
- flexed support legs 35 are shown as a preferable example.
- the number of the flexed support legs 35 is preferably four to eight, and most preferably five. Less than four legs will make it difficult to keep the can bottle stable by itself, and make stable delivery or the like impossible. Greater than eight legs will be very difficult to form.
- FIGS. 4 and 5 there are four (or six or eight) flexed support legs provided such that their sections appear uniformly at both ends of each drawing sheet. That is, the flexed support legs 35 are shown in section to be arranged uniformly in the radial direction.
- some domed portions 31 are defined by a gap between the adjacent flexed support legs 35 (in FIG. 1 there are five such gaps depicted), and one domed portion 31 is defined by a central portion of the bottom surrounded by the plurality of flexed support legs 35 (in FIG. 1 there is one central portion depicted), these domed portions being integrally joined to one another.
- the domed portion 31 indicated by a dotted line is the one positioned in a gap between the adjacent flexed support legs 35
- the domed portion 31 indicated by a solid line is the one positioned at the central portion of the bottom surrounded by the plurality of flexed support legs 35 .
- One characteristic feature of the invention is that, given the curvature of the domed portion at the bottom 30 defined by a radius of curvature R 3 (mm), the bottom is configured in such a way as to satisfy a specific condition: preferably 1.04 ⁇ R 3 /D ⁇ 1.67, and more preferably 1.17 ⁇ R 3 /D ⁇ 1.33 where D (mm) is the diameter of the cylindrical side wall 20 .
- D (mm) is the diameter of the cylindrical side wall 20 .
- the base point for R 3 (mm) is found on the axis P of the can bottle shown in FIG. 4 .
- a general can of beer has a diameter D of 66 mm, and given the relation of this diameter D to the can thickness as an example, the radius of curvature R 3 must be 68.7 to 110.1 mm, preferably 72.1 to 99.2 mm, more preferably 73.0 to 97.0 mm, and most preferably 77.2 to 87.5 mm.
- a diameter D distribution may be taken in the longitudinal (axial) direction to determine the most frequently found value of D as the diameter D (mm) of the cylindrical side wall 20 .
- the diameter D (mm) used herein may be in a range of 52 mm to 95 mm.
- the value of L is in a range of 8 to 12 mm, and preferably 10 mm if the diameter D is 66 mm. Processing limits to aluminum impose some restriction on the height of the flexed support legs 35 in view of the diameter D.
- the value of t is in a range of 0.20 to 0.30 mm, preferably 0.20 to 0.25 mm, more preferably 0.20 to 0.22 mm, and most preferably 0.20 mm if the diameter D is 66 mm.
- the value of the radius R 1 of the flexed support leg 35 is given by 0.12 ⁇ R 1 /D ⁇ 0.18 where D (mm) is the diameter of the side wall 20 .
- the value of R 1 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm.
- the value of the radius R 2 extending from the flexed support leg 35 and joined to the domed portion positioned at the central site is given by 0.12 ⁇ R 2 /D ⁇ 0.18, and the value of R 2 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm.
- the soft or hard drinks to be filled up in the can preferably include carbonated soft and hard drinks that create a positive internal pressure in the can, for instance, beers, beer-like drinks, the so-called third beers, carbonated beverages, and carbonated wines.
- the invention is preferably applied to soft or hard drink can products having an internal pressure of up to 640 kPa.
- the resisting pressure strength of 640 kPa have had to be guaranteed, and for displacements of the central portion and legs at the can bottom (at an internal pressure of 640 kPa), the central portion have had to be spaced up away from the bottom (make sure the freestanding capability of the can), and an increment of up to 1.0 mm was allowed for the leg.
- the resisting pressure analysis was carried out as follows.
- the thickness of the bottom was set at 0.20 to 0.30 mm.
- Diameter D of the cylindrical side wall 20 66 mm
- the variables are the radius of curvature R 3 (mm) that defines the curvature of the domed portion with respect to the diameter D, and the initial height H (see FIG. 4 ) of the central portion of the bottom affected by that value (with no internal pressure).
- R 3 /D the radius of curvature of the domed portion with respect to the diameter D
- H the initial height of the central portion of the bottom affected by that value (with no internal pressure).
- Criterion (1) is not satisfied, it is condemned or judged as being lack of the freestanding capability. If Criterion (2) is not satisfied, it is condemned or judged as being too large in terms of leg stretching.
- the R 3 /D range capable of satisfying Criteria (1) and (2) at the internal pressure of 640 kPa was determined while the thicker bottom portion was varied in thickness between 0.20 mm and 0.30 mm.
- Leg Stretching ⁇ Condition (2) ⁇ L ⁇ 1.0 mm at the internal pressure of 640 kPa is satisfied.
- Leg Stretching x Condition (2) ⁇ L ⁇ 1.0 mm at the internal pressure of 640 kPa is unsatisfied.
- the first aspect of the invention provide a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprising a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of said domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, wherein said bottom satisfies a condition: 1.04 ⁇ R 3 /D ⁇ 1.67 where R 3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
- the can bottle in a bottomed, cylindrical configuration according to the second aspect of the invention and a drink can product obtained by filling a drink in that can bottle and sealing it with a lid will now be explained in further details.
- FIG. 6 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction;
- FIG. 7 is a schematically enlarged perspective view of the bottom of the inventive can bottle;
- FIG. 8 is a schematically enlarged perspective view, as in FIG. 7 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines: the bump form at the bottom in general, and one preferable form of the ribs in particular that is part of the invention is clearly shown.
- FIGS. 6 and 7 schematically illustrative of the can bottle, the ribs that are part of the invention are left out.
- FIG. 9 is a schematically enlarged perspective view of the bottom in a modification to FIG. 8 , wherein there are eight flexed support legs provided.
- FIG. 10 is a schematically enlarged perspective view of the bottom in a modification to FIG. 9 , wherein there are two ribs crossing each other at the most extended position.
- FIG. 11 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized.
- FIG. 10 is a schematically enlarged perspective view of the bottom in a modification to FIG. 9 , wherein there are two ribs crossing each other at the most extended position.
- FIG. 11 is a schematically sectional view of the bottom of the can bottle, where
- FIG. 12 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction.
- a solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively.
- downward or “down” means a direction toward the bottom of a can bottle when it is in an upright posture. In other words, when the can bottle is being held up, that term is defined as a direction in which the can bottle is placed upright on the bottom side. The opposite direction is “upward” or “up”.
- the inventive can bottle 2 is formed of a metal material such as aluminum in a bottomed, cylindrical configuration comprising a cylindrical side wall (the so-called can shank) and a bottom 3 joined to and integrated with that side wall 20 .
- a lid seal material such as a can lid may be tightly sealed and fitted.
- the bottom 3 of the can bottle comprises domed portions 31 that flex and extend downwardly and outwardly, and flexed support legs 35 formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion.
- the most characteristic feature of the invention is that at possible grounding sites of the flexed support legs 35 at the bottom, there are ribs 38 formed in a direction crossing the radial direction. In the embodiment shown in FIG. 8 , five such flexed support legs 35 are each provided with one rib 38 .
- some domed portions 31 are defined by a gap between the adjacent flexed support legs 35 (in FIG. 6 there are five such gaps depicted), and one domed portion 31 is defined by a central portion of the bottom surrounded by the plurality of flexed support legs 35 (in FIG. 6 there is one central portion depicted), these domed portions being integrally joined to one another.
- the configuration of the domed portions 31 could clearly be understood.
- the domed portion 31 indicated by a dotted line is the one positioned in a gap between the flexed support legs 35
- the domed portion 31 indicated by a solid line is the one positioned at the central portion of the bottom surrounded by the plurality of flexed support legs 35 .
- the ribs 38 are formed at the possible grounding sites of the flexed support legs at the bottom whereby the buckling strength of the thinner flexed support legs 35 with respect to vertical loads can be brought up.
- possible grounding sites of the flexed support legs at the bottom refers to sites where the flexed support legs would sit on a plane when the bottom side of the can bottle is placed thereon.
- the possible grounding sites of the flexed support legs 35 at the bottom match the most extended positions of the flexed support legs 35 , and the ribs 38 are formed in a direction crossing a radial line of flexion passing through those positions.
- the crossing direction for the rib 38 should preferably be a substantially right-angle direction along a circumferential direction with respect to the radial direction. This is to achieve efficient improvements in buckling strength to vertical loads.
- the “substantially right-angle direction” here refers to a range of 90° ⁇ 15°.
- each and every rib 38 acts as a reinforcement (bone) structure for giving rigidity or strength to thinner portions, and if the rib 38 has such action, there is no particular limitation on rib morphology.
- the rib 38 takes on an elongated, dented groove form, with its longitudinal direction lying in the substantially right-angle direction along the circumferential direction with respect to the radial direction.
- the elongated, dented groove form is formed at the site of the bottom at which the flexed support leg is to be grounded in the direction crossing the radial direction, so the contour of that groove form assumes on an elongated, oval form. It follows that, as shown in the partially sectioned view of the rib attached to the lower right of FIG. 8 , there is a concavely dented rib body portion 38 a formed as viewed in section in the radial direction passing through the most extended position of the flexed support leg.
- the rib 38 of such morphology there are two or more grounding points formed at the bottom per one flexed support leg 35 .
- two or more grounding points should be formed at the bottom by the rib's outer edge itself. The formation of two or more grounding points makes sure the prevention of inward slipping of the legs, resulting in a lot more improvements in the buckling strength to vertical loads, and leading to improvements in grounding stability as well.
- FIG. 9 illustrates a modification to FIG. 8 , and shows an embodiment wherein there are eight flexed support legs 35 provided, and one rib 38 is formed for each leg 35 .
- the rib 38 is positioned and formed at the possible grounding site of the flexed support leg 35 at the bottom in the substantially right-angle direction along the circumferential direction with respect to the radial direction.
- FIG. 10 illustrates a further modification to FIG. 9 , and shows an embodiment wherein another new rib 39 is added and formed at the most extended position of the flexed support leg 35 at the bottom in a radial line of flexion passing through that position, resulting in an arrangement wherein, as shown in FIG. 10 , two ribs 38 and 39 cross each other (substantially orthogonal to each other) at the most extended position of the flexed support leg 35 .
- two ribs 38 and 39 cross each other (orthogonal to each other)
- there are four grounding points formed at the bottom per one flexed support leg 35 contributing much more to just only buckling strength with respect to vertical loads but grounding stability as well.
- the configuration here in which a plurality of flexed support legs 35 are positioned and constructed like a petal is sometimes called the petaloid configuration.
- flexed support legs 35 are shown as a preferable example.
- the number of the flexed support legs 35 is preferably four to eight, and most preferably five. Less than four legs will make it difficult to keep the can bottle stable and upright by itself, and make stable delivery or the like impossible. Greater than eight legs will be very difficult to form.
- the bottom of the can bottle should preferably be set up in such a way as to satisfy a condition: 1.04 ⁇ R 3 /D ⁇ 1.67, and preferably 1.17 ⁇ R 3 /D ⁇ 1.33
- R 3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom 3
- D (mm) is the diameter of the cylindrical side wall 20 .
- the base point for R 3 (mm) is found on the axis P of the can bottle shown in FIG. 11 .
- a general can of beer has a diameter D of 66 mm, and given the relation of this diameter D to the can thickness as an example, the radius of curvature R 3 must be 68.7 to 110.1 mm, preferably 72.1 to 99.2 mm, more preferably 73.0 to 97.0 mm, and most preferably 77.2 to 87.5 mm.
- a diameter D distribution may be taken in the longitudinal (axial) direction to determine the most frequently found value of D as the diameter D (mm) of the cylindrical side wall 20 .
- the diameter D (mm) used herein may be in a range of 52 mm to 95 mm.
- the value of L is in a range of 8 to 12 mm, and preferably 10 mm if the diameter D is 66 mm. Processing limits to aluminum impose some restriction on the height of the flexed support leg 35 in view of the diameter D.
- D (mm) is the diameter of the side wall 20 .
- the value of t is in a range of 0.20 to 0.30 mm, preferably 0.20 to 0.25 mm, more preferably 0.20 to 0.22 mm, and most preferably 0.20 mm if the diameter D is 66 mm.
- the value of the radius R 1 of the flexed support leg 35 is given by 0.12 ⁇ R 1 /D ⁇ 0.18 where D (mm) is the diameter of the side wall 20 .
- the value of R 1 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm.
- the value of the radius R 2 extending from the flexed support leg 35 and joined to the domed portion positioned at the central portion is given by 0.12 ⁇ R 2 /D ⁇ 0.18, and the value of R 2 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm.
- the soft or hard drinks filled up in the can preferably include carbonated soft and hard drinks that create a positive internal pressure in the can, for instance, beers, beer-like drinks, the so-called third beers, carbonated beverages, and carbonated wines.
- the invention is preferably applied to soft or hard drink can products having an internal pressure of up to 640 kPa.
- Circumferential width 10 mm
- Resisting pressure strength was determined on the following basis.
- the second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprising a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction.
- the inventive can bottle in a bottomed, cylindrical configuration, and a drink can product in which that can bottle is filled up with a soft or hard drink, for instance, may find use in a variety of drink industries and general packaging industries.
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Abstract
A can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material has a cylindrical side wall and a bottom joined to and integrated with the side wall. The bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion. The bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall. In addition ribs are formed at possible grounding sites of the flexed support legs at the bottom in a direction crossing the radial direction.
Description
- This is a Divisional application of U.S. application Ser. No. 13/393,061 filed Feb. 28, 2012 which is a National Stage application of International Application No. PCT/JP2010/065459 filed Sep. 2, 2010, which claims priority to Japanese Application Nos. JP-2009-202231 and JP-2009-218575, filed on Sep. 2, 2009 and Sep. 24, 2009, respectively. The disclosures of the prior applications are hereby incorporated by reference herein in their entirety.
- The present invention relates generally to a can bottle in a bottomed, cylindrical configuration, and a can product that is filled up therein with a soft or hard drink, and sealed up with a lid, and specifically to a can bottle with its bottom having such morphological features that the rigidity of the bottom can be maintained even when it is made thinner than ever before and the freestanding capability of the can bottle is ensured even as the internal pressure rises, and a soft or hard drink can product. More specifically, the invention relates to a can bottle provided with a bottom having just only these morphological features but also a feature that is capable of preventing inward slippage of legs and enhancing buckling strength to vertical loads, and a soft or hard drink can product.
- Generally for the bottom configuration of a so-called positive pressure can in which a carbonated drink like beer is sealingly contained, there has so far been a structure used, in which a central area accounting for most of the bottom is domed in such a way as to make its way into the can bottle, and ring-form bumps are joined to the outer periphery of the dome to provide a surface on which the bottom is to sit.
- In such a general, conventional positive pressure can, the central portion of the bottom is domed in such a way as to make its way into the can bottle as described above, and the thickness of the bottom is set by far larger than that of the can shank forming the side wall of the can bottle.
- Such positive pressure cans are now used on a huge market scale; so if the metal used for individual cans are able to be saved just a bit, it would end up with some considerable overall cost cuttings.
- From such a point of view, Japanese Translation of PCT International Application Publication No. JP-T 2002-515842 shows that for the main purpose of reducing the thickness of the metal material of a can bottom wall, there is a bottom wall provided, in which an outwardly convex dome is provided, and a plurality of support legs, each of a substantially truncated quadrangular shape, are formed on that dome, and alternately located at spaces in a circumferential direction, extending down from the dome.
- However, that publication discloses nothing about teachings enough to make sure resisting pressure and the freestanding capability of the can bottle: only with what is disclosed in that publication, there is a risk that even when the central area of the bottom bulges only a bit as the internal pressure rises, the freestanding capability of the can bottle may possibly be lost.
- The situations being like this, the first idea (aspect) of the invention has for its object to provide a can bottle having a bottom that enables its rigidity to be maintained even when the bottom is made thin, and make sure the freestanding capability of the can bottle as the internal pressure rises, and a soft or hard drink can product using that can bottle.
- The second idea (aspect) of the invention is an improvement in the first aspect of the invention, having for its objet to provide a can bottle having a bottom configuration capable of increasing buckling strength to vertical loads, and a soft or hard drink can product using that can bottle. To put it another way, a problem with a metal can having a so-called petaloid bottom configuration is that when there is a vertical load applied in the axial direction of the can bottle, the legs slip down toward the central portion of the bottom, deforming and starting to buckle up. The main purpose of the second aspect of the invention is to provide a solution to that problem.
- To accomplish the aforesaid object (1), the inventors have made study after study of a variety of parameters including leg height, the radius of curvature of the domed portion, and can diameter in particular, and found that processing limits to metal materials in general and aluminum in particular impose some restrictions on increasing leg height L, and in order to make sure the freestanding capability of the can bottle, the relation of the radius of curvature of the domed portion to the magnitude of can diameter is of vital importance. Such findings have underlain the invention of this application.
- That is, the first aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein said bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, that condition is narrowed down to 1.17≦R3/D≦1.33 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the diameter D (mm) of the cylindrical side wall is set at 52 to 95 mm.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the height L (mm) of each flexed support leg is set in such a way as to satisfy 0.12≦L/D≦0.18 where D (mm) is the diameter of the side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the bottom has an average thickness t (mm) enough to satisfy 0.0030≦t/D≦0.0045 where D (mm) is the diameter of the side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, there are four to eight support legs provided.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the domed portions are defined by a gap between adjacent flexed support legs, and a central portion of the bottom surrounded by a plurality of flexed support legs.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the plurality of flexed support legs are located and constructed in a petaloid configuration.
- A soft or hard drink can product of the invention is formed by filling a drink up in the can bottle in a bottomed, cylindrical configuration, and then sealing an opening with a lid.
- In a preferable embodiment of the inventive soft or hard drink can product, the internal pressure of the can is set at up to 640 kPa.
- In a preferable embodiment of the inventive soft or hard drink can product, the drink is a carbonated drink.
- The first aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein said bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall. The arrangement being like this, even when the bottom of the can bottle is thinned, it is possible just only to maintain the rigidity of the bottom of the can bottle but also to make sure the freestanding capability of the can bottle as the internal pressure grows high, for instance, even when the internal pressure of a soft or hard drink can bottle that has been filled up with a carbonated drink and sealed with a lid reaches as high as 640 kPa.
- To accomplish the aforesaid object (2), the second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprises a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the grounding sites of the flexed support legs at the bottom define the most extended positions of the flexed support legs, and the ribs are formed in a direction crossing a radial line of flexion passing through said positions.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, said ribs are formed such that there are two or more grounding points provided at the can bottle's bottom per one flexed support leg.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, said ribs are formed such that said ribs per se each define two or more grounding points at the can bottle's bottom.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, said ribs are each configured into a concavely dented shape as viewed in cross section in the radial section passing through the most extended position of the flexed support leg.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, each or the rib is configured in an elongated, dented groove shape.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, there are four to eight flexed support legs provided, each one including said rib.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, another rib is added to and formed at the most extended position of the flexed support leg at said bottom such that two ribs cross each other at the most extended position.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, said two ribs are provided in such a way as to cross each other, whereby there are four grounding points provided at the can bottle's bottom per one flexed support leg.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, said bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion, and D (mm) is the diameter of the cylindrical side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the diameter D (mm) of the cylindrical side wall is set at 52 to 95 mm.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the height L (mm) of each or the flexed support leg is provided in such a way as to satisfy 0.12≦L/D≦0.18 where D (mm) is the diameter of the side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the bottom has an average thickness t (mm) enough to satisfy 0.0030≦t/D≦0.0045 where D (mm) is the diameter of the side wall.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the domed portions are defined by a gap between adjacent flexed support legs, and a central portion of the bottom surrounded by a plurality of flexed support legs.
- In a preferable embodiment of the inventive can bottle in a bottomed, cylindrical configuration, the plurality of flexed support legs are located and constructed in a petaloid configuration.
- A soft or hard drink can product of the invention is formed by filling a drink up in the can bottle in a bottomed, cylindrical configuration, and then sealing an opening with a lid.
- In a preferable embodiment of the inventive soft or hard drink can product, the internal pressure of the can is set at up to 640 kPa.
- In a preferable embodiment of the inventive soft or hard drink can product, the drink is a carbonated drink.
- The second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material having a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction. The arrangement being like this, even when the bottom of the can bottle is thinned, it is possible to maintain the rigidity of that bottom. In particular, it is possible to prevent inward slippage of the legs, resulting in the ability to make buckling strength to vertical loads much higher.
- According to the second aspect of the invention wherein the inventive ribs are provided at given sites of the bottom, when there is a vertical load applied in the axial direction, it is possible to prevent inward slippage of the legs, and keep the central portion of the bottom against rising. These preventive actions contribute much more to improvements in buckling strength to vertical loads.
-
FIG. 1 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction. -
FIG. 2 is a schematically enlarged perspective view of the bottom of the inventive can bottle in a bottomed, cylindrical configuration. -
FIG. 3 is a schematically enlarged perspective view, as inFIG. 2 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines. -
FIG. 4 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet, and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized. -
FIG. 5 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet, and the flexed support legs are arranged uniformly in the radial direction. A solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively. That is, the dotted line is indicative of the drink can product that is being pressurized or a positive pressure can. -
FIG. 6 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction. -
FIG. 7 is a schematically enlarged perspective view of the bottom of the inventive can bottle in a bottomed, cylindrical configuration. -
FIG. 8 is a schematically enlarged perspective view, as inFIG. 7 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines: the bump form at the bottom in general, and one preferable form of the ribs in particular that is part of the invention is clearly shown. Note here that one rib is shown in partial section. -
FIG. 9 is a schematically enlarged perspective view of the bottom in a modification toFIG. 8 , wherein there are 8 flexed support legs provided. -
FIG. 10 is a schematically enlarged perspective view of the bottom in a modification toFIG. 9 , wherein there are two ribs crossing each other at the most extended position. -
FIG. 11 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized. -
FIG. 12 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. A solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively. That is, the dotted line is indicative of the drink can product that is being pressurized or a positive pressure can. - The can bottle in a bottomed, cylindrical configuration according to the first aspect of the invention, and a drink can product obtained by filling a drink in that can bottle and sealing it with a lid will now be explained in further details.
- First of all, the can bottle in a bottomed, cylindrical configuration is explained.
-
FIG. 1 is a schematically perspective view of the inventive can bottle in a bottomed, cylindrical configuration, as viewed from the bottom direction;FIG. 2 is a schematically enlarged perspective view of the bottom of the can bottle;FIG. 3 is a schematically enlarged perspective view, similar toFIG. 1 , of the bottom wherein the morphological image of a bump-and-dip arrangement is indicated by lines;FIG. 4 is a schematically sectional view of the bottom of the inventive can bottle before pressurized, wherein four (or six or eight) flexed support legs are provided such that their sections appear uniformly at both ends of the drawing sheet, and they are uniformly arranged in the radial direction; andFIG. 5 is illustrative in schematic and section, as inFIG. 4 , of how the bottom of the can bottle deforms as it is pressurized (the state of a positive pressure can). - It is here to be noted that the term “downward” or “down” means a direction toward the bottom of a can bottle when it is in an upright posture. In other words, when the can bottle is being held up, that term is defined as a direction in which the can bottle is placed upright on the bottom side. The opposite direction is “upward” or “up”.
- As shown in
FIG. 1 , the inventive can bottle 1 is formed of a metal material such as aluminum in a bottomed, cylindrical configuration comprising a cylindrical side wall 20 (the so-called can shank) and a bottom 30 joined to and integrated with thatside wall 20. - On top of the
side wall 20, there is anopening 10 provided, and there is aneck portion 11 provided around which a lid seal material such as a can lid (not shown) may be tightly sealed and fitted. - As shown in
FIG. 1 , the bottom 30 of the can bottle includes, and is constructed from,domed portions 31 that flex and extend downwardly and outwardly, and a plurality of flexed (or curved)support legs 35 that are formed by extending a plurality of peripheral sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion. - The configuration in which a plurality of flexed
support legs 35 are positioned and constructed like a petal is sometimes called the petaloid configuration. - In
FIGS. 1 , 2 and 3, five flexedsupport legs 35 are shown as a preferable example. The number of the flexedsupport legs 35 is preferably four to eight, and most preferably five. Less than four legs will make it difficult to keep the can bottle stable by itself, and make stable delivery or the like impossible. Greater than eight legs will be very difficult to form. - Referring to
FIGS. 4 and 5 , there are four (or six or eight) flexed support legs provided such that their sections appear uniformly at both ends of each drawing sheet. That is, the flexedsupport legs 35 are shown in section to be arranged uniformly in the radial direction. - Due to the presence of the flexed
support legs 35, unlike an ordinarily envisioned image, somedomed portions 31 are defined by a gap between the adjacent flexed support legs 35 (inFIG. 1 there are five such gaps depicted), and onedomed portion 31 is defined by a central portion of the bottom surrounded by the plurality of flexed support legs 35 (inFIG. 1 there is one central portion depicted), these domed portions being integrally joined to one another. - By looking at
FIG. 4 with reference toFIG. 1 , the morphology of thedomed portion 31 could clearly be understood. Referring specifically toFIG. 4 , thedomed portion 31 indicated by a dotted line is the one positioned in a gap between the adjacentflexed support legs 35, and thedomed portion 31 indicated by a solid line is the one positioned at the central portion of the bottom surrounded by the plurality of flexedsupport legs 35. - One characteristic feature of the invention is that, given the curvature of the domed portion at the bottom 30 defined by a radius of curvature R3 (mm), the bottom is configured in such a way as to satisfy a specific condition: preferably 1.04≦R3/D≦1.67, and more preferably 1.17≦R3/D≦1.33 where D (mm) is the diameter of the
cylindrical side wall 20. As a matter of course, the base point for R3 (mm) is found on the axis P of the can bottle shown inFIG. 4 . - In view of design, it could be difficult to divide the domed portion into multiple sites to locally vary the value of the radius of curvature R3 defining the curvature of the domed portion in a place dependent fashion. However, if the joined or combined radius of locally varying, two or more radii of curvature is used for determining the curvature of the domed portion, a certain radius of curvature R3 refigured out of three points: central portion G1, and G2 and G3 contiguous to the
side wall 20 inFIG. 1 may be applied as the radius of curvature R3 (mm) referred to herein. - A general can of beer has a diameter D of 66 mm, and given the relation of this diameter D to the can thickness as an example, the radius of curvature R3 must be 68.7 to 110.1 mm, preferably 72.1 to 99.2 mm, more preferably 73.0 to 97.0 mm, and most preferably 77.2 to 87.5 mm.
- When the outer diameter of the
cylindrical side wall 20 varies locally in the axial direction, a diameter D distribution may be taken in the longitudinal (axial) direction to determine the most frequently found value of D as the diameter D (mm) of thecylindrical side wall 20. The diameter D (mm) used herein may be in a range of 52 mm to 95 mm. - The height L (mm) of each flexed
support leg 35 herein (distance L in the height direction from point G3 at which the outermost portion of the radius of curvature R3 of the domed portion crosses thecylindrical side wall 20 to aplane 70 on which the can bottle sits as shown inFIG. 4 ) is given by 0.12≦L/D≦0.18, and preferably L/D=0.15 where D (mm) is the diameter of theside wall 20. In consideration of L alone, the value of L is in a range of 8 to 12 mm, and preferably 10 mm if the diameter D is 66 mm. Processing limits to aluminum impose some restriction on the height of the flexedsupport legs 35 in view of the diameter D. - The average thickness t (mm) of the bottom 30 herein is given by 0.0030≦t/D≦0.0045, and preferably t/D=0.0030 where D is the diameter of the
side wall 20. In consideration of t alone, the value of t is in a range of 0.20 to 0.30 mm, preferably 0.20 to 0.25 mm, more preferably 0.20 to 0.22 mm, and most preferably 0.20 mm if the diameter D is 66 mm. - As the value of the aforesaid R3/D gets less than 1.04, the distance H from the lowermost position G1 of the domed portion to the
plane 70 inFIG. 4 tends to get short. When, in that state, a positive pressure can product having an internal pressure of 640 kPa is made, there will be inconvenience: the can bottle will be unable to satisfy the freestanding capability. As the value of R3/D exceeds 1.67, on the other hand, a positive pressure can product having an internal pressure of 640 kPa will grow too high because the downward stretching ΔL of the flexedsupport leg 35 shown inFIG. 5 will exceed 1 mm, resulting in jamming during can delivery, poor packaging or other inconveniences. - For further details of the determination of these R3/D values, see Specific Experiment Examples to be given later.
- It is here to be noted that in the sectional view of
FIG. 4 , the value of the radius R1 of the flexedsupport leg 35 is given by 0.12≦R1/D≦0.18 where D (mm) is the diameter of theside wall 20. The value of R1 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm. In the sectional view ofFIG. 4 , the value of the radius R2 extending from the flexedsupport leg 35 and joined to the domed portion positioned at the central site is given by 0.12≦R2/D≦0.18, and the value of R2 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm. - After the can bottle in a bottomed, cylindrical configuration provided with the bottom having such configuration features as described above is filled up with a soft or hard drink, a lid is tightly sealed and fitted over the
opening 10, whereby a drink can product is formed. The soft or hard drinks to be filled up in the can preferably include carbonated soft and hard drinks that create a positive internal pressure in the can, for instance, beers, beer-like drinks, the so-called third beers, carbonated beverages, and carbonated wines. - The invention is preferably applied to soft or hard drink can products having an internal pressure of up to 640 kPa.
- The first aspect of the invention is now explained more specifically to the specific experiment examples regarding the can bottle in a bottomed, cylindrical configuration.
- By way of simulation using the finite element method, the so-called petaloid configuration was searched, and resisting pressure analysis was carried out.
- The prerequisites for the searching of the bottom configuration were to clear the following configuration checkpoints.
- The resisting pressure strength of 640 kPa have had to be guaranteed, and for displacements of the central portion and legs at the can bottom (at an internal pressure of 640 kPa), the central portion have had to be spaced up away from the bottom (make sure the freestanding capability of the can), and an increment of up to 1.0 mm was allowed for the leg.
- The resisting pressure analysis was carried out as follows.
- The thickness of the bottom was set at 0.20 to 0.30 mm.
- The values of the following configuration-setting factors remained constant.
- Leg Height L (see
FIG. 4 ): 10 mm - Leg Bulging R1 (see
FIG. 4 ): 10 mm - Joining R2 of the leg to the domed portion (see
FIG. 4 ): 10 mm - Diameter D of the cylindrical side wall 20: 66 mm
- Accordingly, the variables are the radius of curvature R3 (mm) that defines the curvature of the domed portion with respect to the diameter D, and the initial height H (see
FIG. 4 ) of the central portion of the bottom affected by that value (with no internal pressure). In the experiment here, if R3/D is determined, then the height H of the central portion of the bottom gets determined, because the diameter D remains constant. - Set out below are the criteria for the determination of resisting pressure strength.
- (1) ΔH-ΔL<H (at an internal pressure of 640 kPa)
- (2) ΔL<1.0 mm (at an internal pressure of 640 kPa) where ΔH is the amount of deformation of the bottom's central portion, ΔL is the amount of deformation of the leg (see
FIG. 5 ), and H is the initial height of the bottom's central portion (with no internal pressure) (seeFIG. 4 ). - If Criterion (1) is not satisfied, it is condemned or judged as being lack of the freestanding capability. If Criterion (2) is not satisfied, it is condemned or judged as being too large in terms of leg stretching.
- On the basis of such criteria for the determination of resisting pressure strength, the R3/D range capable of satisfying Criteria (1) and (2) at the internal pressure of 640 kPa was determined while the thicker bottom portion was varied in thickness between 0.20 mm and 0.30 mm.
- The results are shown in Table 1.
-
TABLE 1 Bottom's Thickness (mm) 0.20 0.25 0.30 R3/D range capable of 1.17~1.33 1.09~1.50 1.04~1.67 satisfying the following Conditions (1) and (2) at the internal pressure of 640 kPa (1) ΔH − ΔL < H (at the internal pressure of 640 kPa) (2) ΔL < 1.0 mm (at the internal pressure of 640 kPa) where ΔH is the amount of deformation of the bottom's central portion, ΔL is the amount of deformation of the leg (see Fig. 5), and H is the initial height of the bottom's central portion (with no internal pressure) (see Fig. 4). - In conjunction with Table 1, specific values indicative of how much the can bottle deformed as well as the results of estimation of the freestanding capability and leg stretching at the bottom's thickness of 0.20 mm and the R3/D value of 1.27, 0.98, and 1.74 are shown in Table 2.
-
TABLE 2 (at the bottom's thickness of 0.20 mm) Free- Leg R3/D H ΔH − ΔL ΔL standing Stretching Ex. 1-I-1 1.27 3.2 2.26 0.85 ∘ ∘ Comparative 0.98 1.0 1.57 0.72 x ∘ Ex. 1-I-1 Comparative 1.74 5.1 3.44 1.35 ∘ x Ex. 1-I-2 Freestanding Capability ∘ Condition (1): ΔH − ΔL < H at the internal pressure of 640 kPa is satisfied. Freestanding Capability x Condition (1): ΔH − ΔL < H at the internal pressure of 640 kPa is unsatisfied. Leg Stretching ∘ Condition (2): ΔL < 1.0 mm at the internal pressure of 640 kPa is satisfied. Leg Stretching x Condition (2): ΔL < 1.0 mm at the internal pressure of 640 kPa is unsatisfied. - In conjunction with Table 1, specific values indicative of how much the can bottle deformed as well as the results of estimation of the freestanding capability and leg stretching at the bottom's thickness of 0.25 mm and the R3/D value of 1.27, 0.98, and 1.74 are shown in Table 3.
-
TABLE 3 (at the bottom's thickness of 0.25 mm) Free- Leg R3/D H ΔH − ΔL ΔL standing Stretching Ex. 1-II-1 1.27 3.2 1.90 0.71 ∘ ∘ Comparative 0.98 2.0 1.29 0.60 x ∘ Ex. 1-II-1 Comparative 1.74 5.1 3.01 1.17 ∘ x Ex. 1-II-2 - In conjunction with Table 1, specific values indicative of how much the can bottle deformed as well as the results of estimation of freestanding capability and leg stretching at the bottom's thickness of 0.30 mm and the R3/D value of 1.27, 0.98, and 1.74 are shown in Table 4.
-
TABLE 4 (at the bottom's thickness of 0.30 mm) Free- Leg R3/D H ΔH − ΔL ΔL Standing Stretching Ex. 1-III-1 1.27 3.2 1.61 0.60 ∘ ∘ Comparative 0.98 1.0 1.06 0.49 x ∘ Ex. 1-III-1 Comparative 1.74 5.1 2.63 1.03 ∘ x Ex. 1-III-2 - Pursuant to Experiment Example 1-I, simulation experimentation for the determination of the ranges of other parameters making sure the advantages of the invention was carried out in conjunction with the diameter D of the can bottle while that diameter D was varied in a range of 52 mm to 95 mm.
- As a result, it has experimentally been found that the advantages of the invention are ensured within the ranges defined by the following relations or conditions:
-
1.04≦R 3 /D≦1.67 -
0.0030≦t/D≦0.0045 -
0.12≦L/D≦0.18 -
0.12≦R 1 /D≦0.18 -
0.12≦R 2 /D≦0.18 - From the aforesaid results, the advantages of the first aspect of the invention could clearly be understood. That is, the first aspect of the invention provide a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprising a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending a plurality of peripheral edge sites of said domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, wherein said bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the bottom, and D (mm) is the diameter of the cylindrical side wall. The arrangement being like this, even though the bottom of the can bottle is thinned, it is possible just only to maintain the rigidity of the bottom of the can bottle but also to make sure the freestanding capability of the can bottle as the internal pressure grows high, for instance, even when the internal pressure of the soft or hard drink can bottle that has been filled up with a carbonated drink and sealed with a lid reaches as high as 640 kPa.
- The can bottle in a bottomed, cylindrical configuration according to the second aspect of the invention, and a drink can product obtained by filling a drink in that can bottle and sealing it with a lid will now be explained in further details.
- First of all, the can bottle in a bottomed, cylindrical configuration is explained.
-
FIG. 6 is a schematic perspective view of the inventive can bottle in a cylindrical bottomed configuration, as viewed from the bottom direction;FIG. 7 is a schematically enlarged perspective view of the bottom of the inventive can bottle;FIG. 8 is a schematically enlarged perspective view, as inFIG. 7 , of the bottom, wherein the morphological image of a bump-and-dip arrangement is indicated by lines: the bump form at the bottom in general, and one preferable form of the ribs in particular that is part of the invention is clearly shown. InFIGS. 6 and 7 schematically illustrative of the can bottle, the ribs that are part of the invention are left out. -
FIG. 9 is a schematically enlarged perspective view of the bottom in a modification toFIG. 8 , wherein there are eight flexed support legs provided.FIG. 10 is a schematically enlarged perspective view of the bottom in a modification toFIG. 9 , wherein there are two ribs crossing each other at the most extended position.FIG. 11 is a schematically sectional view of the bottom of the can bottle, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. Note here that the interior of the can bottle is not yet pressurized.FIG. 12 is a schematically sectional view of how the bottom of the can bottle serving as a drink can product deforms by being pressurized, wherein four (or six or eight) flexed support legs are provided such that the sections of the flexed support legs appear uniformly at both ends of the drawing sheet (but the ribs are left out), and the flexed support legs are arranged uniformly in the radial direction. A solid line and a dotted line at the bottom are indicative of before and after pressurization, respectively. - It is here to be noted that the term “downward” or “down” means a direction toward the bottom of a can bottle when it is in an upright posture. In other words, when the can bottle is being held up, that term is defined as a direction in which the can bottle is placed upright on the bottom side. The opposite direction is “upward” or “up”.
- As shown in
FIG. 6 , the inventive can bottle 2 is formed of a metal material such as aluminum in a bottomed, cylindrical configuration comprising a cylindrical side wall (the so-called can shank) and a bottom 3 joined to and integrated with thatside wall 20. - On top of the
side wall 20, there is anopening 10 provided, and there is aneck portion 11 provided around which a lid seal material (not shown) such as a can lid may be tightly sealed and fitted. - As shown in
FIG. 6 , thebottom 3 of the can bottle comprisesdomed portions 31 that flex and extend downwardly and outwardly, and flexedsupport legs 35 formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion. As shown inFIG. 8 , the most characteristic feature of the invention is that at possible grounding sites of the flexedsupport legs 35 at the bottom, there areribs 38 formed in a direction crossing the radial direction. In the embodiment shown inFIG. 8 , five suchflexed support legs 35 are each provided with onerib 38. - Due to the presence of the flexed
support legs 35, unlike an ordinarily envisioned image, somedomed portions 31 are defined by a gap between the adjacent flexed support legs 35 (inFIG. 6 there are five such gaps depicted), and onedomed portion 31 is defined by a central portion of the bottom surrounded by the plurality of flexed support legs 35 (inFIG. 6 there is one central portion depicted), these domed portions being integrally joined to one another. - By looking at
FIG. 11 with reference toFIG. 6 , the configuration of thedomed portions 31 could clearly be understood. Referring specifically toFIG. 11 , thedomed portion 31 indicated by a dotted line is the one positioned in a gap between the flexedsupport legs 35, and thedomed portion 31 indicated by a solid line is the one positioned at the central portion of the bottom surrounded by the plurality of flexedsupport legs 35. - In the invention, as shown in
FIG. 8 , theribs 38 are formed at the possible grounding sites of the flexed support legs at the bottom whereby the buckling strength of the thinner flexedsupport legs 35 with respect to vertical loads can be brought up. - The wording “possible grounding sites of the flexed support legs at the bottom” refers to sites where the flexed support legs would sit on a plane when the bottom side of the can bottle is placed thereon. In other words, the possible grounding sites of the flexed
support legs 35 at the bottom match the most extended positions of the flexedsupport legs 35, and theribs 38 are formed in a direction crossing a radial line of flexion passing through those positions. - When, as shown in
FIG. 8 , there is onerib 38 provided for each flexedsupport leg 35, the crossing direction for therib 38 should preferably be a substantially right-angle direction along a circumferential direction with respect to the radial direction. This is to achieve efficient improvements in buckling strength to vertical loads. The “substantially right-angle direction” here refers to a range of 90°±15°. - Each and every
rib 38 acts as a reinforcement (bone) structure for giving rigidity or strength to thinner portions, and if therib 38 has such action, there is no particular limitation on rib morphology. In the invention, however, it is particularly preferred that therib 38 takes on an elongated, dented groove form, with its longitudinal direction lying in the substantially right-angle direction along the circumferential direction with respect to the radial direction. The elongated, dented groove form is formed at the site of the bottom at which the flexed support leg is to be grounded in the direction crossing the radial direction, so the contour of that groove form assumes on an elongated, oval form. It follows that, as shown in the partially sectioned view of the rib attached to the lower right ofFIG. 8 , there is a concavely dented rib body portion 38 a formed as viewed in section in the radial direction passing through the most extended position of the flexed support leg. - By the formation of the
rib 38 of such morphology, there are two or more grounding points formed at the bottom per one flexedsupport leg 35. Preferably, two or more grounding points should be formed at the bottom by the rib's outer edge itself. The formation of two or more grounding points makes sure the prevention of inward slipping of the legs, resulting in a lot more improvements in the buckling strength to vertical loads, and leading to improvements in grounding stability as well. -
FIG. 9 illustrates a modification toFIG. 8 , and shows an embodiment wherein there are eight flexedsupport legs 35 provided, and onerib 38 is formed for eachleg 35. As is the case withFIG. 8 , it is then preferable that therib 38 is positioned and formed at the possible grounding site of the flexedsupport leg 35 at the bottom in the substantially right-angle direction along the circumferential direction with respect to the radial direction. -
FIG. 10 illustrates a further modification toFIG. 9 , and shows an embodiment wherein anothernew rib 39 is added and formed at the most extended position of the flexedsupport leg 35 at the bottom in a radial line of flexion passing through that position, resulting in an arrangement wherein, as shown inFIG. 10 , tworibs support leg 35. By allowing tworibs support leg 35, contributing much more to just only buckling strength with respect to vertical loads but grounding stability as well. - When there are two
ribs support leg 35 as shown inFIG. 10 , it is preferable that given the zero degree lying in the radial direction, there are (1) a rib combination of a 0°±15° rib and a 90°±15° rib (the same as shown inFIG. 10 ), and (2) a rib combination of a 45°±15° rib and a 135°±15° rib. - The configuration here in which a plurality of flexed
support legs 35 are positioned and constructed like a petal is sometimes called the petaloid configuration. - In
FIGS. 6 , 7 and 8, five flexedsupport legs 35 are shown as a preferable example. The number of the flexedsupport legs 35 is preferably four to eight, and most preferably five. Less than four legs will make it difficult to keep the can bottle stable and upright by itself, and make stable delivery or the like impossible. Greater than eight legs will be very difficult to form. - In the invention, it is desired to rely upon bottom specifications capable of satisfying the following requirements or conditions for the purpose of making the bottom thinner and making sure the stable freestanding capability of the can bottle.
- That is, the bottom of the can bottle should preferably be set up in such a way as to satisfy a condition: 1.04≦R3/D≦1.67, and preferably 1.17≦R3/D≦1.33 where R3 (mm) is the radius of curvature that defines the curvature of the domed portion at the
bottom 3, and D (mm) is the diameter of thecylindrical side wall 20. As a matter of course, the base point for R3 (mm) is found on the axis P of the can bottle shown inFIG. 11 . - In view of design, it could be difficult to divide the domed portion into multiple portions to locally vary the value of the radius of curvature R3 defining the curvature of the domed portion in a place dependent fashion. However, if the joined or combined radius of locally different, two or more radii of curvature is used for determining the curvature of the domed portion, a certain radius of curvature R3 refigured out of three points: central portion G1, and G2 and G3 contiguous to the
side wall 20 inFIG. 11 may be applied as the radius of curvature R3 (mm) referred to herein. - A general can of beer has a diameter D of 66 mm, and given the relation of this diameter D to the can thickness as an example, the radius of curvature R3 must be 68.7 to 110.1 mm, preferably 72.1 to 99.2 mm, more preferably 73.0 to 97.0 mm, and most preferably 77.2 to 87.5 mm.
- When the outer diameter of the
cylindrical side wall 20 varies locally in the axial direction, a diameter D distribution may be taken in the longitudinal (axial) direction to determine the most frequently found value of D as the diameter D (mm) of thecylindrical side wall 20. The diameter D (mm) used herein may be in a range of 52 mm to 95 mm. - The height L (mm) of each flexed
support leg 35 herein (distance L in the height direction from point G3 at which the outermost portion of the radius of curvature R3 of the domed portion crosses theside wall 20 to aplane 70 on which the can bottle sits as shown inFIG. 11 ) is given by 0.12≦L/D≦0.18, and preferably L/D=0.15 where D (mm) is the diameter of theside wall 20. In consideration of L alone, the value of L is in a range of 8 to 12 mm, and preferably 10 mm if the diameter D is 66 mm. Processing limits to aluminum impose some restriction on the height of the flexedsupport leg 35 in view of the diameter D. - The average thickness t (mm) of the bottom 30 herein is given by 0.0030≦t/D≦0.0045, and preferably t/D=0.0030 where D (mm) is the diameter of the
side wall 20. In consideration of t alone, the value of t is in a range of 0.20 to 0.30 mm, preferably 0.20 to 0.25 mm, more preferably 0.20 to 0.22 mm, and most preferably 0.20 mm if the diameter D is 66 mm. - As the value of the aforesaid R3/D gets less than 1.04, the distance H from the lowermost position G1 of the domed portion to the
plane 70 inFIG. 11 tends to get short. When, in that state, a positive pressure can product having an internal pressure of 640 kPa is made, there will be inconvenience: the can bottle will be unable to satisfy the freestanding capability. As the value of R3/D gets greater than 1.67, on the other hand, a positive pressure can product having an internal pressure of 640 kPa will grow too high because the downward stretching ΔL of the flexedsupport leg 35 shown inFIG. 12 will get greater than 1 mm, resulting in jamming during can delivery, poor packaging or other inconveniences. - It is here to be noted that in the sectional view of
FIG. 11 , the value of the radius R1 of the flexedsupport leg 35 is given by 0.12≦R1/D≦0.18 where D (mm) is the diameter of theside wall 20. The value of R1 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm. In the sectional view ofFIG. 11 , the value of the radius R2 extending from the flexedsupport leg 35 and joined to the domed portion positioned at the central portion is given by 0.12≦R2/D≦0.18, and the value of R2 alone is 8 to 12 mm, preferably 9 to 11 mm, and more preferably 10 mm if the diameter D is 66 mm. - After the can bottle in a bottomed, cylindrical configuration provided with the bottom having such configuration features as described above is filled up with a soft or hard drink, a lid is tightly sealed and fitted over the
opening 10, whereby a drink can product is formed. The soft or hard drinks filled up in the can preferably include carbonated soft and hard drinks that create a positive internal pressure in the can, for instance, beers, beer-like drinks, the so-called third beers, carbonated beverages, and carbonated wines. - The invention is preferably applied to soft or hard drink can products having an internal pressure of up to 640 kPa.
- The second aspect of the invention is now explained more specifically to the specific experiment examples regarding the can bottle in a bottomed, cylindrical configuration.
- By way of simulation using the finite element method, the so-called petaloid configuration was analyzed in terms of buckling.
- Buckling analysis was carried out as follows.
- Analysis was carried out at the bottom's thickness of 0.25 mm. Note here that in a thickness range of 0.20 mm to 0.30 mm, too, the same effects as obtained in the case of 0.25 mm were confirmed through analysis.
- Set out below are the bottom configuration-setting parameters.
- Number of flexed support legs 35: 5 (see
FIG. 8 ) -
- or 8 (see
FIG. 9 ) Leg height L (seeFIG. 11 ): 10 mm Leg bulging R1 (seeFIG. 11 ): 10 mm Jointing R2 of the leg to the domed portion (seeFIG. 11 ): 10 mm
Diameter D of the cylindrical side wall 20: 66 mm
Radius of curvature R3 of the domed portion (seeFIG. 11 ): 84 mm
Distance H from the central can bottom to the plane at which the can bottle sits (seeFIG. 11 ): 3.2 mm
Rib's morphology and location:
- or 8 (see
- (i) Inventive sample having one rib for each flexed
support leg 35 as shown inFIGS. 8 and 9 - Rib Size
- Diametrical width: 2 mm
- Circumferential width: 10 mm
- Depth: 1 mm at deepest
- (ii) Comparative sample having no rib at all
- Resisting pressure strength was determined on the following basis.
- When progressive compression load was applied to the sample at 10 mm/min., where in the load (N) the sample buckled up was measured: to what load (N) the sample was held out was measured.
- Set out in Table 5, given below, are the numeral data indicative of the results of analysis.
-
TABLE 5 Buckling Strength (at the average bottom thickness of 0.25 mm) Number of Legs Rib Buckling Strength (N) Ex. 2-I-1 5 Used 900 Comparative Ex. 2-I-1 5 None 700 Ex. 2-I-2 8 Used 600 Comparative Ex. 2-I-2 8 None 510 - From the results set out in Table 5, the advantages of the invention could clearly be appreciated. That is, the second aspect of the invention provides a can bottle in a bottomed, cylindrical configuration, which is constructed of a metal material and comprising a cylindrical side wall and a bottom joined to and integrated with said side wall, wherein said bottom includes domed portions that flex and extend downwardly and outwardly, and flexed support legs formed by extending (or bulging out) a plurality of peripheral edge sites of the domed portions arranged at uniform angles further downwardly and outwardly in a flexed fashion, and wherein there are ribs formed at possible grounding sites of the flexed support legs at said bottom in a direction crossing the radial direction. The arrangement being like this, even when the bottom of the can bottle is thinned, it is possible to maintain the rigidity of that bottom. In particular, it is possible to prevent inward slippage of the legs, resulting in the ability to make buckling strength to vertical loads much higher.
- The inventive can bottle in a bottomed, cylindrical configuration, and a drink can product in which that can bottle is filled up with a soft or hard drink, for instance, may find use in a variety of drink industries and general packaging industries.
Claims (10)
1. A can having a cylindrical shape and being constructed of a metal material, the can comprising:
a cylindrical side wall; and
a bottom joined to and integrated with said side wall, the bottom including:
domed portions that flex and extend downwardly; and
support legs formed by flexing and extending a plurality of peripheral edge sites of the domed portions further downwardly; wherein
said domed portions include a first portion that is surrounded by the plurality of support legs and a plurality of second portions that are positioned between adjacent support legs; and
said bottom satisfies a condition: 1.04≦R3/D≦1.67 where R3 (mm) is a radius of curvature that defines a curvature of the first portion at the bottom, and D (mm) is a diameter of the cylindrical side wall.
2. The can recited in claim 1 , wherein said condition is narrowed down to 1.17≦R3/D≦1.33 where R3 (mm) is the radius of curvature that defines the curvature of the first portion at the bottom, and D (mm) is the diameter of the cylindrical side wall.
3. The can recited in claim 1 , wherein the diameter D (mm) of the cylindrical side wall is set at 52 to 95 mm.
4. The can recited in claim 1 , wherein a height L (mm) of each support leg is set to satisfy 0.12≦L/D≦0.18 where D (mm) is the diameter of the cylindrical side wall.
5. The can recited in claim 1 , wherein said bottom has an average thickness t (mm) enough to satisfy 0.0030≦t/D≦0.0045 where D (mm) is the diameter of the cylindrical side wall.
6. The can recited in claim 1 , wherein there are four to eight support legs provided.
7. The can recited in claim 1 , wherein the plurality of support legs are located and constructed in a petaloid configuration.
8. A drink product, which is formed by filling the can recited in claim 1 with a drink, and then sealing an opening with a lid.
9. The drink product as recited in claim 8 , wherein the can has an internal pressure that is within a range of up to 640 kPa.
10. The drink product as recited in claim 9 , wherein the drink is a carbonated drink.
Priority Applications (1)
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US14/622,499 US20150158624A1 (en) | 2009-09-02 | 2015-02-13 | Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink |
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JP2009-202231 | 2009-09-02 | ||
JP2009202231A JP5256150B2 (en) | 2009-09-02 | 2009-09-02 | Can body body with bottomed cylindrical body and beverage can product filled with beverage |
JP2009-218575 | 2009-09-24 | ||
JP2009218575A JP5256155B2 (en) | 2009-09-24 | 2009-09-24 | Can body body with bottomed cylindrical body and beverage can product filled with beverage |
PCT/JP2010/065459 WO2011027910A1 (en) | 2009-09-02 | 2010-09-02 | Bottomed cylinder-shaped can container body and beverage can product having the same filled with beverage |
US201213393061A | 2012-02-28 | 2012-02-28 | |
US14/622,499 US20150158624A1 (en) | 2009-09-02 | 2015-02-13 | Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink |
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PCT/JP2010/065459 Division WO2011027910A1 (en) | 2009-09-02 | 2010-09-02 | Bottomed cylinder-shaped can container body and beverage can product having the same filled with beverage |
US13/393,061 Division US8993021B2 (en) | 2009-09-02 | 2010-09-02 | Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink |
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US14/622,499 Abandoned US20150158624A1 (en) | 2009-09-02 | 2015-02-13 | Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink |
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2010
- 2010-09-02 WO PCT/JP2010/065459 patent/WO2011027910A1/en active Application Filing
- 2010-09-02 US US13/393,061 patent/US8993021B2/en not_active Expired - Fee Related
-
2015
- 2015-02-13 US US14/622,499 patent/US20150158624A1/en not_active Abandoned
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
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USD254957S (en) * | 1977-08-17 | 1980-05-13 | Ball Corporation | Beverage container |
USD256333S (en) * | 1977-08-17 | 1980-08-12 | Ball Corporation | Beverage container |
USD257463S (en) * | 1977-08-17 | 1980-10-28 | Ball Corporation | Beverage container |
US4426013A (en) * | 1978-02-06 | 1984-01-17 | Jos. Schlitz Brewing Company | Can body |
US4175670A (en) * | 1978-03-22 | 1979-11-27 | Reynolds Metals Company | Container construction |
USD269066S (en) * | 1980-06-12 | 1983-05-24 | Plastona (John Waddington) Limited | Can or the like |
USD269158S (en) * | 1980-06-12 | 1983-05-31 | Plastona (John Waddington) Limited | Can or the like |
USD270332S (en) * | 1980-08-28 | 1983-08-30 | Plastona (John Waddington) Limited | Can or the like |
USD267393S (en) * | 1980-12-08 | 1982-12-28 | The Continental Group, Inc. | Can |
USD269593S (en) * | 1981-03-27 | 1983-07-05 | The Continental Group, Inc. | Container for liquids or the like |
US5626228A (en) * | 1996-05-01 | 1997-05-06 | Anheuser-Busch Incorporated | Thin-walled can having plurality of supporting feet with two support features |
USD391482S (en) * | 1996-08-15 | 1998-03-03 | Anheuser-Busch Incorporated | Container bottom |
USD398528S (en) * | 1997-03-11 | 1998-09-22 | Anheuser-Busch, Incorporated | Container bottom |
US6293422B1 (en) * | 2000-03-08 | 2001-09-25 | Ball Corporation | Container with combination convex/concave bottom |
US8993021B2 (en) * | 2009-09-02 | 2015-03-31 | Kirin Beer Kabushiki Kaisha | Can bottles in a bottomed, cylindrical configuration, and can products filled up therein with a soft or hard drink |
USD676325S1 (en) * | 2010-04-06 | 2013-02-19 | Petainer Lidkoeping Ab | Self-standing container |
USD722892S1 (en) * | 2013-05-29 | 2015-02-24 | Edward H. Baddour | Beverage container |
Also Published As
Publication number | Publication date |
---|---|
US8993021B2 (en) | 2015-03-31 |
US20120156335A1 (en) | 2012-06-21 |
WO2011027910A1 (en) | 2011-03-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |