EP0450651B1 - Récipient pour boisson présentant une résistance améliorée aux chocs par chute - Google Patents

Récipient pour boisson présentant une résistance améliorée aux chocs par chute Download PDF

Info

Publication number
EP0450651B1
EP0450651B1 EP91105432A EP91105432A EP0450651B1 EP 0450651 B1 EP0450651 B1 EP 0450651B1 EP 91105432 A EP91105432 A EP 91105432A EP 91105432 A EP91105432 A EP 91105432A EP 0450651 B1 EP0450651 B1 EP 0450651B1
Authority
EP
European Patent Office
Prior art keywords
container
panel
radius
curvature
height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP91105432A
Other languages
German (de)
English (en)
Other versions
EP0450651A1 (fr
Inventor
Gary Arthur Baldwin
John M. Ury
Gregory Edwin Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ball Corp
Original Assignee
Ball Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24011097&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0450651(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ball Corp filed Critical Ball Corp
Priority to AT91105432T priority Critical patent/ATE96391T1/de
Publication of EP0450651A1 publication Critical patent/EP0450651A1/fr
Application granted granted Critical
Publication of EP0450651B1 publication Critical patent/EP0450651B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • 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

Definitions

  • the present invention relates generally to metal container bodies of the type having a seamless sidewall and a bottom formed integrally therewith. More particularly, the present invention relates to a bottom contour that provides increased cumulative drop resistance.
  • Container manufacturers package beverages of various types in these containers formed of either steel or aluminum alloys.
  • the most ideal type of container bottom wall would be a flat wall which would allow for maximum capacity for a given container with a minimum height.
  • a container is not economically feasible because, in order to prevent deformation, the thickness of the bottom wall would have to be of such magnitude that the cost of the container would be prohibitive.
  • drawing and ironing processes have been installed and extensively used in recent years, especially for the aluminum container industry.
  • Much work has been done on thinning the body wall.
  • the dome structure itself has been integrally formed with other curvilinear or walled members, usually at different inclinations to that of the longitudinal axis of the container, in order to further strengthen the container structure.
  • curvilinear or walled members usually at different inclinations to that of the longitudinal axis of the container, in order to further strengthen the container structure.
  • Patents which teach apparatus for forming containers with domed bottoms and/or which teach containers having domed bottoms include Maeder et al., U.S. Patent No. 4,289,014, September 15, 1981; Gombas, U.S. Patent No. 4,341,321, July 27, 1982; Elert et al., U.S. Patent No. 4,372,143, February 8, 1983; and Pulciano et al., U.S. Patent No. 4,620,434, November 4, 1986.
  • Stephan in U.S. Patent No. 3,349,956, teaches using a reduced diameter annular supporting portion with an inwardly domed bottom disposed intermediate of the reduced diameter annular supporting portion. Stephan also teaches stacking of the reduced diameter annular supporting portion inside the double-seamed top of another container.
  • Kneusel et al. in U.S. Patent No. 3,693,828, teach a steel container having a bottom portion which is frustoconically shaped to provide a reduced diameter annular supporting portion, and having an internally domed bottom that is disposed radially inwardly of the annular supporting portion.
  • Various contours of the bottom are adjusted to provide more uniform coating of the interior bottom surface, including a reduced radius of the domed bottom.
  • Pulciani et al. in U.S. Patent Nos. 4,685,582 and 4,768,672, instead of the frustoconical portion of Kneusel et al., teach a transition portion between the cylindrically shaped body of the container and the reduced diameter annular supporting portion that includes a first annular arcuate portion that is convex with respect to the outside diameter of the container and a second annular arcuate portion that is convex with respect to the outside diameter of the container.
  • McMillin in U.S. Patent No. 4,834,256, teaches a transitional portion between the cylindrically shaped body of the container and the reduced diameter annular supporting portion that is contoured to provide stable stacking for containers having a double-seamed top which is generally the same diameter as the cylindrical body, as well as providing stable stacking for containers having a double-seamed top that is smaller than the cylindrical body.
  • containers with reduced diameter tops stack inside the reduced diameter annular supporting portion; and containers with larger tops stack against this specially contoured transitional portion.
  • one of the problems is obtaining a maximum dome reversal pressure for a given metal thickness.
  • another problem is obtaining resistance to damage when a filled container is dropped onto a hard surface. More particularly, this other problem includes the resistance to structural damage as caused by the combination of dropping the container onto a hard surface, together with the internal fluid pressure in the container, the internal fluid pressure being a function of the type of beverage and of the temperature thereof.
  • the cumulative drop height is the cumulative height at which the bottom contour is damaged sufficiently to preclude standing firmly upright on a flat surface.
  • the internal fluid pressure of the beverage is closely controlled at an elevated pressure by controlling the temperature of the beverage.
  • failure of the container is caused by the combination of the stresses induced by the internal fluid pressure and the impacts of repeated drop tests with the inertial force of the fluid in the container.
  • a drawn and ironed beverage container includes an annular supporting portion that is disposed radially inwardly from the sidewall of the container and that is disposed around and concentric to a vertical axis, a domed panel, or concave panel, that is disposed inwardly of the annular supporting portion, and an outer connecting portion that connects the annular supporting portion to the sidewall.
  • the outer connecting portion includes a lower concave annular arcuate portion and an upper convex annular arcuate portion that is connected to the lower concave annular supporting portion and to the sidewall.
  • the annular supporting portion includes inner and outer convex annular portions which preferably are arcuate and are disposed about the same center of curvature.
  • the annular supporting portion, and the inner and outer convex annular portions thereof, provide an annular supporting surface for supporting the container on a flat and horizontal surface, for providing means for nesting the containers when they are stacked.
  • the container includes an inner connecting portion that connects the domed panel, or concave panel, to the annular supporting portion.
  • the inner connecting portion includes an inner concave annular portion that extends radially outward from the domed panel and that curves downward toward the inner convex annular portion, and an inner wall that is disposed circumferentially around the vertical axis, that connects the inner concave annular portion to the inner convex annular portion, and that disposes the domed panel at a positional distance above the annular supporting surface.
  • the radius of curvature of the domed panel is reduced into a range wherein the static dome reversal pressure is degraded to the point wherein the container would not perform satisfactorily.
  • This radical reduction in the radius of curvature of the domed panel produces not only an entirely unacceptable reduction in the static dome reversal pressure, but also produces a dramatic, and an unexpected increase in the cumulative drop height resistance.
  • This increase in the cumulative drop height resistance may be as much as, or even more than, six hundred percent. And this tremendous improvement in the cumulative drop height resistance is achieved with the same thickness of material.
  • the benefits are of no commercial value without accompanying means for obviating most, or nearly all, of the detrimental decrease in the static dome reversal pressure that accompanies the required reduction in the radius of curvature of the domed panel.
  • the present invention provides a container with an excellent static dome reversal pressure, an astonishingly increased cumulative drop height resistance, and makes it possible for not only permitting the use of shrink wrap and other inexpensive means in the place of cardboard for packaging containers, but also the possibility of using thinner metal stock material for the containers and achieving a reduction in material cost.
  • a container in the first three aspects of the present invention, includes a sidewall that is disposed around a vertical axis, an annular supporting portion that is disposed around the vertical axis, and that includes an annular supporting surface disposed around the vertical axis and orthogonal thereto, an outer connecting portion that interconnects the sidewall and the annular supporting portion, a concave panel that is disposed inwardly from the annular supporting portion, and an inner connecting portion that is connected to the annular supporting portion, that extends upwardly into the container, that is connected to the concave panel, and that disposes the concave panel at a positional distance above the supporting surface.
  • the curvature of the concave panel is increased into a range wherein dome reversal pressure of the container is decreased with an increase in pressure, for increasing the cumulative drop height resistance of the container.
  • the positional distance from the supporting surface to the curved portion is increased to increase the dome reversal pressure of the container.
  • the curvature of the concave panel is reduced wherein the dome reversal pressure of the container is decreased with increases in the curvature, for increasing the cumulative drop height resistance of the container, and the positional distance from the supporting surface to the concave panel is increased to at least partially prevent the increase in the curvature of the concave panel from decreasing the dome reversal pressure of the container.
  • a container in the fourth and fifth aspects of the invention, includes a sidewall that is substantially cylindrical and that is disposed concentrically around a vertical axis, an annular supporting portion that includes an annular supporting surface orthogonal to the vertical axis, and that includes a convex annular portion disposed around the vertical axis curving inwardly and upwardly from the supporting surface, an outer connecting portion that interconnects the sidewall and the supporting portion, a concave panel that includes a substantially spherical contour and that is disposed radially inwardly from the convex annular portion, a concave annular portion that is disposed circumferentially around the concave panel, that is connected to the concave panel, and that curves downwardly toward the convex annular portion, a circumferential inner wall that is connected to the convex annular portion, that extends upwardly from the convex annular portion, and that is connected to the concave annular portion.
  • the radius of curvature of the concave panel is reduced into a range wherein the dome reversal pressure of the concave panel is decreased with decreases in the radius of curvature, for increasing the cumulative drop height resistance of the container.
  • the radius of curvature of the concave panel is reduced into a range wherein the dome reversal pressure of the concave panel is decreased with decreases in the radius of curvature, for increasing the cumulative drop height resistance of the container, and the height of the inner wall is increased, for increasing the dome reversal pressure of the concave panel.
  • a method for increasing the strength of a container in which the container includes a sidewall that is disposed around a vertical axis, a supporting portion that is disposed around the vertical axis and that includes an annular supporting surface disposed around the vertical axis, an outer connecting portion that connects the sidewall to the supporting surface, and a concave panel that is disposed inwardly from the annular supporting portion, an inner connecting portion that is connected to the annular supporting portion, that extends upwardly into the container, and that disposes the concave panel at a positional distance above the supporting surface.
  • the cumulative drop resistance of the container is increased by increasing the curvature of the concave panel, and by limiting the increasing step to an allowable decrease in the dome reversal pressure.
  • the dome reversal pressure of the container is increased by increasing the positional distance from the supporting surface to the concave panel.
  • the dome reversal pressure and the cumulative drop strength of a container are optimized by increasing the curvature of the domed panel to a curvature in which the dome reversal pressure is reduced from that which is produced by a smaller curvature, thereby increasing the cumulative drop strength, and increasing the positional distance to at least partially compensate for the reduction in the dome reversal pressure.
  • a container in an eighth and ninth aspect of the invention, includes a generally cylindrical sidewall that has a first diameter and that is disposed circumferentially around a vertical axis, an annular support that is disposed circumferentially around the vertical axis, that is disposed radially inwardly from the sidewall, that includes an outer convex annular portion, and that includes an inner convex annular portion disposed radially inwardly from the outer convex annular portion and attached to the outer convex annular portion, for supporting the container, an outer connecting portion that includes an upper convex annular portion connected to the sidewall, that includes a recessed annular portion disposed radially inwardly of a line tangent to the outer convex annular portion and the upper convex annular portion, for connecting the sidewall to the outer convex annular portion of the annular supporting means, a domed panel that is generally spherically-shaped, that is disposed radially inwardly from the annular supporting means, and that curves
  • a container capable of substantially resisting dome reversal upon impact includes a structure with a seamless cylindrical sidewall and a bottom wall integrally formed with the sidewall at the lower extremity thereof, an outer connecting member that extends downwardly and inwardly from the sidewall toward the vertical axis of the container, the outer connecting member including an upper convex portion with an interior radius and a lower concave portion with an exterior radius, the radii being substantially equal, an annular bottom member that is integrally connected with and that extends downwardly from the lower concave portion to provide a supporting means for the container, a frustoconical surface that integrally connects with the annular bottom member and that extends upwardly and inwardly therefrom, said frustoconical surface forming a slight angle with respect to the vertical axis of the container, and a downwardly concave center panel that is integrally connected with the frustoconical surface and that extends upwardly and inwardly from the frustocon
  • FIGURES 3, 4, and 5 are generally common to Pulciani et al. in U.S. Patents 4,685,582 and 4,768,672 and 4,620,434, to a design manufactured by the assignee of the present invention, and to embodiments of the present invention. More particularly, FIGURE 3 is common to the aforesaid prior art, FIGURE 4 is common to two embodiments of the prior art, and FIGURE 5 shows some details of FIGURES 3 and 4 in an enlarged scale.
  • FIGURES 3-5 Since the present invention differs from the prior art primarily by selection of some of the parameters shown in FIGURES 3-5, the forthcoming description refers to all of these drawings, except as stated otherwise; and some dimensions pertaining to FIGURES 3 and 4 are placed only on FIGURE 5 in order to avoid crowding.
  • a drawn and ironed beverage container 10 includes a generally cylindrical sidewall 12 that includes a first diameter D1, and that is disposed circumferentially around a vertical axis 14; and an annular supporting portion, or annular supporting means, 16 that is disposed circumferentially around the vertical axis 14, that is disposed radially inwardly from the sidewall 12, and that provides an annular supporting surface 18 that coincides with a base line 19.
  • the annular supporting portion 16 includes an outer convex annular portion 20 that preferably is arcuate, and an inner convex annular portion 22 that preferably is arcuate, that is disposed radially inwardly from the outer convex annular portion 20, and that is connected to the outer convex annular portion 20.
  • the outer and inner convex annular portions, 20 and 22, have radii R1 and R2 whose centers of curvature are common. More particularly, the radii R1 and R2 both have centers of curvature of a point 24, and of a circle of revolution 26 of the point 24.
  • the circle of revolution 26 has a second diameter D2.
  • An outer connecting portion, or outer connecting means, 28 includes an upper convex annular portion 30 that is preferably arcuate, that includes a radius of R3, and that is connected to the sidewall 12.
  • the outer connecting portion 28 also includes a recessed annular portion 32 that is disposed radially inwardly of a line 34, or a frustoconical surface of revolution 36, that is tangent to the outer convex annular portion 20 and the upper convex annular portion 30.
  • the outer connecting means 28 connects the sidewall 12 to the outer convex annular portion 20.
  • a domed panel, or concave panel, 38 is preferably spherically-shaped, but may be of any suitable curved shape, has a radius of curvature, or dome radius, R4, is disposed radially inwardly from the annular supporting portion 16, and curves upwardly into the container 10. That is, the domed panel 38 curves upwardly proximal to the vertical axis 14 when the container 10 is in an upright position.
  • the container 10 further includes an inner connecting portion, or inner connecting means, 40 having a circumferential inner wall, or cylindrical inner wall, 42 with a height L1 that extends upwardly with respect to the vertical axis 14 that may be cylindrical, or that may be frustoconical and slope inwardly toward said vertical axis 14 at an angle ⁇ 1.
  • the inner connecting portion 40 also includes an inner concave annular portion 44 that has a radius R5, and that interconnects the inner wall 42 and the domed panel 38. Thus, the inner connecting portion 40 connects the domed panel 38 to the annular supporting portion 16.
  • the inner connecting portion 40 positions a periphery 45 of the domed panel 38 at a positional distance L2 above the base line 19.
  • the positional distance L2 is approximately equal to, but is somewhat less than, the sum of the height L1 of the inner wall 42, the radius of curvature R5 of the inner concave annular portion 44, the radius R2 of the inner convex annular portion 22, and the thickness of the material at the inner convex annular portion 22.
  • the positional distance L2 is less than the aforementioned sum by a function of the angle ⁇ 1, and as a function of an angle ⁇ 3 at which the periphery 45 of the domed panel 38 is connected to the inner concave annular portion 44.
  • the positional distance L2 is about, but somewhat less than 2,591 mm (0.102 inches) more than the height L1 of the inner wall 42.
  • the positional distance L2 is about, but a little less than, 4,115 mm (0.162 inches).
  • the annular supporting portion 16 has an arithmetical mean diameter D3 that occurs at the junction of the outer convex annular portion 20 and the inner convex annular portion 22.
  • the mean diameter D3 and the diameter D2 of the circle 26 are the same diameter.
  • the dome radius R4 is on the vertical axis 14.
  • the recessed annular portion 32 includes a circumferential outer wall 46 that extends upwardly from the outer convex annular portion 20 and outwardly 5 away from said vertical axis by an angle ⁇ 2, and includes a lower concave annular portion 48 with a radius R6. Further, the recessed annular portion 32 may, according to the selected magnitudes of the angle ⁇ 2, the radius R3, and the radius R6, include a lower part of the upper convex annular portion 30.
  • the container 10 includes a dome height, or panel height, H1 as measured from the supporting surface 18 to the domed panel 38, and a post diameter, or smaller diameter, D4, of the inner wall 42.
  • the upper convex annular portion 30 is tangent to the sidewall 12, and has a center 50.
  • the center 50 is at a height H2 above the supporting surface 18.
  • a center 52 of the lower concave annular portion 48 is on a diameter D5.
  • the center 52 is below the supporting surface 18. More specifically, the supporting surface 18 is at a distance H3 above the center 52.
  • the static dome reversal pressure (S.D.R) is in pounds per square inch one pound per square inch being 0,0068947 N/mm2
  • the cumulative drop height (C.D.H.) is in inches one inch being 25,4 mm
  • the internal pressure (I.P.) at which the cumulative drop height tests were run is in pounds per square inch one pound per square inch being 0,0068947 N/mm2.
  • the radius of curvature R4 of the domed panel 38 is the actual radius of curvature of the container, as measured, not the radius of curvature of the domer tooling.
  • a radius of curvature R4 of 60,325mm (2.375 inches) is made with a tool that has a radius of 53,848 mm (2.120 inches). This difference in radius of curvature for the actual container and the tooling is true for both the three aforementioned patents and the prior art embodiments of the assignee of the subject invention.
  • Tables 1-10 the following Table A comparison between tooling radius and the actual dome radius R4 of the containers.
  • a radius of curvature R4 of 60,325 mm (2.375 inches) compares to the prior art of FIGURES 3 and 4, in which the radius of the domer tooling was 53,848 mm (2.120 inches); and the improvements of the present invention, at other radii of curvature, can be seen as a comparison to an R4 of 60,325 mm (2.375 inches).
  • Tables 1-10 The tests of Tables 1-10 were run with two thickness of metal, as specified.
  • the 0,2997 mm (0.0118 inch) thickness is the standard gauge for use in the United States; and the 0,3226 mm (0.0127 inch) thickness is used for special orders, particularly for use outside the United States. All of the test material was aluminum alloy which is designated as 3104 H19, and the test material was taken from production stock.
  • the cumulative drop heights in the tables represent the average of eighteen tests, and the static dome reversal pressures represent the average of ten tests.
  • the internal fluid pressures in each container prior to dropping is shown in the table for each drop test.
  • the purpose for the cumulative drop height is to determine the cumulative drop height at which a filled can exhibits partial or total reversal of the domed panel.
  • the procedure is as follows: 1) warm the product in the containers to 32,22 ⁇ 1,11 degrees Celsius (90 degrees, plus or minus 2 degrees, Fahrenheit); 2) position the tube of the drop height tester to 5 degrees from vertical to achieve consistent container drops; 3) insert the container from the top of the tube, lower it to the 76,2 mm (3 inch) position, and support the container with a finger; 4) allow the container to free-fall and strike the steel base; 4) repeat the test at heights that successively increase by 76,2 mm (3 inch) increments; 5) feel the domed panel to check for any bulging or "reversal" of the domed panel before testing at the next height; 6) record the height at which dome reversal occurs; 7) calculate the cumulative drop height, that is, add each height at which a given container has been dropped, including the height at which dome reversal occurs; and 8) average the results from 10 containers.
  • the present invention provides a container with a cumulative drop height resistance that greatly exceeds that of prior art containers; and containers manufactured according to the present invention are able to meet a cumulative drop height requirement of 508, 762, 1016 or even 1524 mm (20, 30, 40, or even 60 inches) without any increase in the gauge of the material, and without any increase in cost.
  • the cumulative drop heights were 127 mm (5.0 inches) and 444,5 mm (17.5 inches), for metal thicknesses of 0,2997 mm (0.0118 inches) and 0,3226 mm (0.0127 inches), respectively, and with internal pressures of 0,43023 N/mm2 (62.4 pounds per square inch) and 0,42058 N/mm2 (61.0 pounds per square inch), respectively. Notice that the static dome reversal pressures were 0,66051 and 0,76462 N/mm2 (95.8 and 110.9 pounds per square inch) for the two metal thicknesses.
  • the radius of curvature of the domed panel for Table 1, as listed, is 60,325 mm (2.375 inches), and that this is the actual radius of curvature for prior art in which the domer tooling radius is 53,848 mm 2.120 inches.
  • the present invention increased the cumulative drop height by more than fourteen times, from 127 mm (5.0 inches) to 1867 mm (73.5 inches) for the thinner stock, and by nearly eight times, from 444,5 mm (17.5 inches) to 3497,6 mm (137.7 inches) for the thicker stock.
  • the present invention provides means for obviating, or at least ameliorating, this decrease in the static dome reversal pressure that accompanies the dramatic increase in the cumulative drop height.
  • the present invention increased the cumulative drop height from 127 mm (5.0 inches) and 444,5 mm (17.5 inches), respectively, to 1778 mm (70.0 inches) and 3454,4 mm (136.0 inches), respectively for the thinner and the thicker stock. Therefore, the present invention increased the cumulative drop height by fourteen times for the thinner stock and by almost eight times for the thicker stock.
  • the containers had a static dome reversal pressure of 0,63018 N/mm2 (91.4 psi) and 0,73704 N/mm2 (106.9 psi) respectively.
  • increasing the height L1 of the inner wall 42 limited the reduction in the static dome reversal pressure to less than 5 percent for the thinner stock, and by 4 percent for the thicker stock, while achieving increases in the cumulative drop height by about eight to fourteen times, depending upon the metal thickness.
  • Table 11 the test data of Tables 1-10 has been rearranged in Table 11 to show variations in test results when the dome height H1 is kept constant; and in FIGURE 6, the data of Table 11 is plotted to show the cumulative drop heights vs. the radius of curvature R4 for tests wherein the dome height H1 is kept constant at 9,779 mm (0.385 inches).
  • the designation B6A denotes a container made in accordance with the dimensions presently given for the prior art container of the assignee of the subject invention.
  • the other container designations e.g., X0133 refer to experimental drawing numbers of various experimental tools.
  • Table 12 the test data of Tables 1-10 has been rearranged in Table 12 to show variations in test results when the dome height H1 is varied to maintain a constant, or nearly constant, static dome reversal pressure of 0,66189 N/mm2 (96 psi) for the 0,2997 mm (0.0118 inches) stock thickness and 0,76531 N/mm2 (111 psi) for the 0,3226 mm (0.0127 inches) stock thickness.
  • the data of Table 12 is plotted to show the cumulative drop heights vs. the radius of curvature R4 for tests wherein the static dome reversal pressure is kept constant, or nearly constant, as noted for Table 12.
  • the static dome reversal pressures are plotted for various radii of curvature R4 of the domed panel 38, and for various ratios of radii of curvature R4 to the mean diameter D3 of the annular supporting portion 16.
  • the dome height H1 that is, the distance from the supporting surface 18 to the domed panel 38 along the axis 14, is kept constant at 9,779 mm (0.385 inches).
  • the present invention yields unexpected results. It is believed that one skilled in the art would not have anticipated that a decrease in the dome radius R4 would achieve such a remarkable increase in cumulative drop strengths. Moreover, it is believed that there is no hint in the prior art that any increase in cumulative drop strength can be achieved by a reduction in the dome radius R4 as disclosed and claimed herein.
  • reciting an increase in the dome height H1, or a limit thereof is one way of reciting an increase in, or a limit of, the height L1 of the inner wall 42.
  • reciting an increase in the positional distance L2, or a limit thereof is one way of reciting an increase in, or a limit of, the height L1 of the inner wall 42.
  • upper ones of the containers 10 stack onto lower ones of the containers 10 with the outer connecting portions 28 of the upper ones of the containers 10 nested inside double-seamed tops 56 of lower ones of the containers 10; and both adjacently disposed and vertically stacked containers 10 are bundled into a package 58 by the use of a shrink-wrap plastic 60.
  • the present invention is applicable to containers made of aluminum and various other materials. More particularly, the present invention is applicable to beverage containers of the type having a seamless, drawn and ironed, cylindrically-shaped body, and an integral bottom with an annular supporting portion.
  • the invention may be summarized as follows:
  • a container having increased cumulative drop height resistance which container comprises: a sidewall being disposed around a vertical axis; an annular supporting portion being disposed around said vertical axis and having an annular supporting surface; an outer connecting portion interconnecting said sidewall and said annular supporting portion; a concave panel being disposed inwardly from said annular supporting portion; and an inner connecting portion being connected to said annular supporting portion, extending upwardly and toward said vertical axis, being connected to said concave panel, said concave panel being disposed a positional distance above said supporting surface; said concave panel having a preselected curvature wherein the static dome reversal pressure of said container is decreased.
  • a container having increased cumulative drop height resistance which container comprises: a sidewall being disposed around a vertical axis; an annular supporting portion being disposed around said vertical axis, and having an annular supporting surface that is disposed around said vertical axis and that is orthogonal thereto; an outer connecting portion interconnecting said sidewall and said annular supporting portion; a concave panel being disposed inwardly from said annular supporting portion; an inner connecting portion being connected to said annular supporting portion, extending upwardly into said container, being connected to said concave panel, and disposing said concave panel a positional distance above said supporting surface; and said concave panel having a preselected curvature wherein the static dome reversal pressure of said container is decreased.
  • a container having increased drop height resistance which container comprises: a sidewall being disposed around a vertical axis; an annular supporting portion being disposed around said vertical axis and having an annular supporting surface; an outer connecting portion interconnecting said sidewall and said annular supporting portion; a concave panel being disposed inwardly from said annular supporting portion; an inner connecting portion being connected to said annular supporting portion, extending upwardly into said container, being connected to said concave panel, said concave panel being disposed a positional distance above said supporting surface; said concave panel having a preselected curvature wherein the static dome reversal pressure of said container is decreased; and means, comprising said positional distance, for at least partially preventing said preselected curvature of said concave panel from decreasing said static dome reversal pressure of said container.
  • a container having increased cumulative drop height resistance which container comprises: a sidewall being substantially cylindrical, and being disposed concentrically around a vertical axis; an annular supporting portion comprising an annular supporting surface that is orthogonal to said vertical axis, and comprising a convex annular portion that is disposed around said vertical axis and that curves inwardly and upwardly from said supporting surface; an outer connecting portion interconnecting said sidewall and said annular supporting portion; a concave panel having a substantially spherical contour and being disposed radially inwardly from said convex annular portion; a concave annular portion being disposed circumferentially around said concave panel, being connected to said concave panel, and curving downwardly toward said convex annular portion; a circumferential inner wall being connected to said convex annular portion, extending upwardly therefrom, and being connected to said concave annular portion; and said concave panel having a preselected radius of curvature in the range wherein the static dome
  • a container in which said preselected radius of curvature of said spherical contour is less than about 2.1 inches.
  • a container with increased cumulative drop height resistance which container comprises: a sidewall being substantially cylindrical, and being disposed concentrically around a vertical axis; an annular supporting portion comprising an annular supporting surface that is orthogonal to said vertical axis, and comprising a convex annular portion that is disposed around said vertical axis and that curves inwardly and upwardly from said supporting surface; an outer connecting portion interconnecting said sidewall and said annular supporting portion; a concave panel having a substantially spherical contour and being disposed radially inwardly from said convex annular portion; a concave annular portion being disposed circumferentially around said concave panel, being connected to said concave panel, and curving downwardly toward said convex annular portion; and a circumferential inner wall being connected to said convex annular portion, extending upwardly therefrom, and being connected to said concave annular portion; said concave panel having a preselected radius of curvature in the range wherein static dome
  • a method for increasing the cumulative drop height resistance of a container in which said container includes a sidewall being disposed around a vertical axis, an annular supporting portion being disposed around said vertical axis and having an annular supporting surface that is disposed around said vertical axis, an outer connecting portion connecting said sidewall to said supporting surface, and a concave panel being disposed inwardly from said annular supporting portion, an inner connecting portion being connected to said annular supporting portion, extending upwardly into said container, and disposing said concave panel at a positioned distance above said supporting surface, and in which said method comprises: increasing the curvature of said concave panel to increase said cumulative drop height resistance of said container; and limiting said increasing step to an allowable decrease in static dome reversal pressure.
  • a method which comprises forming said supporting surface with an arithmetical mean diameter, and forming said concave panel with at least a portion thereof that is substantially spherical and that has a radius of curvature; and said increasing step comprises decreasing said radius of curvature to less than about 105 percent of said mean diameter.
  • a method which comprises forming said sidewall substantially cylindrical, and forming said concave panel with at least a portion thereof that is substantially spherical and that has a radius of curvature; and said increasing step comprises decreasing said radius of curvature to less than about 78 percent of the diameter of said sidewall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Table Devices Or Equipment (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Claims (8)

  1. Récipient (10) présentant une résistance accrue à la hauteur cumulative de chute et ayant une pression statique voulue correspondant à une inversion de la direction de bombé de dôme, ce récipient (10) comprenant :
       une paroi latérale (12) qui est disposée autour d'un axe central (14) ;
       une partie annulaire (16) de support, qui est disposée autour dudit axe central (14) et qui comporte une surface (18) annulaire de support présentant une valeur arithmétique moyenne de son diamètre (D₃) ;
       une partie (28) extérieure de connexion, qui effectue la liaison d'interconnexion entre ladite paroi latérale (12) et ladite partie annulaire (16) de support ;
       un panier concave (18), qui est disposé à l'intérieur de ladite partie annulaire (16) de support et qui présente un rayon de courbure (R₄) et une hauteur (H₁) de panier, que l'on mesure le long dudit axe central (14) depuis ladite surface (18) de support jusqu'audit panier (38) concave ; et
       une partie intérieure (40) de connexion, qui relie ladite partie annulaire (16) de support et ledit panier concave (38), ladite partie intérieure de liaison s'étendant vers le haut et vers ledit axe central (14) selon un angle (α₁), récipient caractérisé en ce que
       ledit angle (α₁), ladite hauteur (H₁) de panier, le rayon (R₄) de courbure et la valeur de la moyenne arithmétique du diamètre (D₃) étant choisis ensemble de façon à assurer ladite résistance à une hauteur cumulée de chute et ladite pression statique voulue correspondant à une inversion du sens de la concavité du dôme ou du bombé du dôme, le rapport entre ledit rayon choisi de courbure (R₄) et ladite valeur arithmétique moyenne choisie du diamètre (D₃) étant inférieur à 1,05, le rapport entre ladite hauteur (H₁) choisie de panier et ladite valeur arithmétique moyenne choisies du diamètre (D₃) étant supérieur à 0,2, et ledit angle (α₁) choisi étant inférieur à 5° par rapport à la verticale.
  2. Récipient (10) tel que revendiqué à la revendication 1, dans lequel au moins une partie (32) de ladite partie de liaison extérieure (28) est concave.
  3. Récipient (10) tel que revendiqué à la revendication 1, dans lequel ladite partie (28) de liaison comprend des première et seconde extrémités (30, 20) voisines de ladite paroi latérale (12) et de ladite partie annulaire (16) de support, respectivement, au moins une partie (32) de ladite partie extérieure (28) de liaison entre lesdites première et seconde extrémités (30, 20) étant déplacée vers l'intérieur, par rapport audit axe central (14), à partir d'un plan (34) passant par lesdites première et seconde extrémités (30, 20).
  4. Récipient (10) tel que revendiqué à la revendication 1, dans lequel le rapport entre ledit rayon choisi de courbure (R₄) et ladite valeur de moyenne arithmétique choisie du diamètre (D₃) est inférieur à 1,019.
  5. Récipient (10) tel que revendiqué à la revendication 1, dans lequel le rapport entre ledit rayon choisi de courbure (R₄) et ladite valeur arithmétique moyenne choisie du diamètre (D₃) se situe entre 0,875 et 1,019.
  6. Récipient (10) tel que revendiqué à la revendication 1, dans lequel ledit angle (α₁) choisi se situe entre 1,25° et 3,5°.
  7. Récipient (10) tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel ledit élément (28) de liaison comprend une partie (30) convexe supérieure ayant un rayon intérieur (R₃) et une partie concave inférieure ayant un rayon extérieur (R₆), lesdits rayons étant sensiblement égaux.
  8. Récipient (10) tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel ledit récipient est fabriqué en un alliage d'aluminium.
EP91105432A 1990-04-06 1991-04-05 Récipient pour boisson présentant une résistance améliorée aux chocs par chute Revoked EP0450651B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91105432T ATE96391T1 (de) 1990-04-06 1991-04-05 Getraenkebehaelter mit verbessertem fallwiderstand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US505618 1983-06-20
US50561890A 1990-04-06 1990-04-06

Publications (2)

Publication Number Publication Date
EP0450651A1 EP0450651A1 (fr) 1991-10-09
EP0450651B1 true EP0450651B1 (fr) 1993-10-27

Family

ID=24011097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105432A Revoked EP0450651B1 (fr) 1990-04-06 1991-04-05 Récipient pour boisson présentant une résistance améliorée aux chocs par chute

Country Status (9)

Country Link
EP (1) EP0450651B1 (fr)
JP (1) JP2771343B2 (fr)
CN (1) CN1055333A (fr)
AT (1) ATE96391T1 (fr)
AU (1) AU644856B2 (fr)
CA (1) CA2038817C (fr)
DE (1) DE69100550T2 (fr)
ES (1) ES2045976T3 (fr)
MX (1) MX174630B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217737A (en) * 1991-05-20 1993-06-08 Abbott Laboratories Plastic containers capable of surviving sterilization
US7472800B2 (en) 2004-03-05 2009-01-06 Rexam Beverage Can Company Bottom profile for drawn and ironed can body
JP4877538B2 (ja) * 2010-06-08 2012-02-15 東洋製罐株式会社 シームレス缶体
CN105899433A (zh) * 2013-12-16 2016-08-24 鲍尔欧洲有限公司 罐体
JP2018104047A (ja) * 2016-12-27 2018-07-05 サントリーホールディングス株式会社 樹脂製容器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693828A (en) * 1970-07-22 1972-09-26 Crown Cork & Seal Co Seamless steel containers
EP0005025B1 (fr) * 1978-04-26 1983-10-19 Ball Corporation Conteneur en métal de faible poids
US4412627A (en) * 1981-05-29 1983-11-01 Metal Container Corporation Drawn and ironed can body
US4465199A (en) * 1981-06-22 1984-08-14 Katashi Aoki Pressure resisting plastic bottle
JPS62500440A (ja) * 1984-10-03 1987-02-26 ナショナル・キャン・コ−ポレイション 容器終端壁を形成するためのド−ム形成装置
US4685582A (en) * 1985-05-20 1987-08-11 National Can Corporation Container profile with stacking feature
JPS62177611U (fr) * 1986-04-30 1987-11-11

Also Published As

Publication number Publication date
CN1055333A (zh) 1991-10-16
AU644856B2 (en) 1993-12-23
JP2771343B2 (ja) 1998-07-02
DE69100550D1 (de) 1993-12-02
DE69100550T2 (de) 1994-05-19
JPH06156467A (ja) 1994-06-03
ATE96391T1 (de) 1993-11-15
MX174630B (es) 1994-05-30
AU7394891A (en) 1991-10-10
CA2038817A1 (fr) 1991-10-07
CA2038817C (fr) 1997-04-22
EP0450651A1 (fr) 1991-10-09
ES2045976T3 (es) 1994-01-16

Similar Documents

Publication Publication Date Title
EP0482586B1 (fr) Récipient pour boissons à fond renforcé
US6293421B1 (en) Beverage container with increased bottom strength
US6077554A (en) Controlled growth can with two configurations
US4768672A (en) Container profile with stacking feature
JP3081312B2 (ja) 底強度を改善した容器、容器の製造方法及び装置
US6131761A (en) Can bottom having improved strength and apparatus for making same
US4037752A (en) Container with outwardly flexible bottom end wall having integral support means and method and apparatus for manufacturing thereof
US5351852A (en) Base profile for a drawn container
JP3120241B2 (ja) 容 器
CA1228822A (fr) Flan de fermeture pour boites de conserverie
US4953738A (en) One piece can body with domed bottom
US5421480A (en) Thin-walled can having a displaceable bottom
US20090321384A1 (en) Plastic container having vacuum panels
US7740148B2 (en) Container bottom
EP3109176A1 (fr) Récipient muni d'un diaphragme réversible incurvé
EP0450651B1 (fr) Récipient pour boisson présentant une résistance améliorée aux chocs par chute
EP0337500B1 (fr) Récipient
EP0005025B1 (fr) Conteneur en métal de faible poids
GB1600006A (en) Containers
US5477977A (en) Thin-walled can having a nestable/stackable bottom support ring
AU4237199A (en) Beverage container with improved bottom strength
WO2006124530A1 (fr) Fond de recipient
US20220242605A1 (en) Lightweight beverage can made from aluminum alloy

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19911231

17Q First examination report despatched

Effective date: 19920907

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931027

Ref country code: CH

Effective date: 19931027

Ref country code: BE

Effective date: 19931027

REF Corresponds to:

Ref document number: 96391

Country of ref document: AT

Date of ref document: 19931115

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 69100550

Country of ref document: DE

Date of ref document: 19931202

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2045976

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3009699

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Effective date: 19940405

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940406

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940430

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: AMERICAN NATIONAL CAN COMPANY

Effective date: 19940725

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19941031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19941101

NLR1 Nl: opposition has been filed with the epo

Opponent name: AMERICAN NATIONAL CAN COMPANY.

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
EUG Se: european patent has lapsed

Ref document number: 91105432.8

Effective date: 19941110

REG Reference to a national code

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3009699

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970409

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970414

Year of fee payment: 7

Ref country code: AT

Payment date: 19970414

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970425

Year of fee payment: 7

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19980601

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 980601