US20130220964A1 - Metal beverage container with improved finish geometry - Google Patents

Metal beverage container with improved finish geometry Download PDF

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Publication number
US20130220964A1
US20130220964A1 US13/770,835 US201313770835A US2013220964A1 US 20130220964 A1 US20130220964 A1 US 20130220964A1 US 201313770835 A US201313770835 A US 201313770835A US 2013220964 A1 US2013220964 A1 US 2013220964A1
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US
United States
Prior art keywords
approximately
finish
beverage container
forming
transition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/770,835
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English (en)
Inventor
John Adams
Rajesh Gopalaswamy
Alejandro J. Santamaria
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.)
Coca Cola Co
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Coca Cola Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coca Cola Co filed Critical Coca Cola Co
Priority to US13/770,835 priority Critical patent/US20130220964A1/en
Assigned to THE COCA-COLA COMPANY reassignment THE COCA-COLA COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ADAMS, JOHN, GOPALASWAMY, RAJESH, SANTAMARIA, ALEJANDRO J.
Publication of US20130220964A1 publication Critical patent/US20130220964A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • 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
    • B21D21/00—Combined processes according to methods covered by groups B21D1/00 - B21D19/00
    • 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
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • 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
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads

Definitions

  • This disclosure relates to metal beverage containers, and more particularly, but not by way of limitation, to finish portions of metal beverage containers.
  • a bottle shaped metal beverage container may include an opening at one end sealed by a closure element, such as a cap.
  • a bottle cap is typically installed by machinery and, in certain examples, twisted or pressed onto the beverage container. This twisting or pressing operation generally causes a certain amount of force for the cap to be properly seated. This force may result in axial loading of the beverage container and damage to the beverage container.
  • beverage containers having configurations that reduce material consumption and weight while retaining the ability to withstand applied loads are desirable.
  • the following disclosure provides for incorporating an arc structure that is outwardly convex below a lip area of the beverage container.
  • the arc may be shaped based on a wall thickness of the beverage container, material of the beverage container, amount of force or load to be applied, and possibly other factors.
  • the shape of the arc may vary in radius, the radius setting an angle at a transition section below the lip at the top of the beverage container, if shaped as a bottle.
  • a finish portion of a metal beverage container includes a lip portion and a threaded portion.
  • the finish portion also includes a transition section.
  • the transition section may include an outwardly convex portion connecting the lip and threaded portions.
  • the lip portion may define a sealing surface that seals against a closure element.
  • the threaded portion may engage threads of the closure element.
  • the outwardly convex portion may have a thickness between approximately 0.125 millimeters and approximately 0.75 millimeters.
  • the outwardly convex portion may have a radius of curvature between approximately 1.0 millimeter and approximately 6.0 millimeters.
  • the outwardly convex portion may have an arc length between approximately 1.0 millimeter and approximately 5.0 millimeters.
  • the transition section may comprise aluminum, steel, or alloys thereof.
  • the outwardly convex portion may be shaped such that the transition section can bear an axial load between approximately 100 Newtons and approximately 3000 Newtons, depending on the style and configuration of beverage container and manufacturing process, without plastically deforming.
  • Other dimensions of the thickness, radius of curvature, and arc length are also contemplated and may vary depending on the materials, manufacturing process, or otherwise.
  • a metal beverage container includes a body portion, a neck portion connected with the body portion, and a finish portion connected with the neck portion.
  • the finish portion includes a lip portion defining a sealing surface that seals against a closure element (e.g., cap), a transition section, and a threaded portion that engages threads of the closure element.
  • the transition section may include an outwardly convex portion connecting the lip and threaded portions.
  • the finish portion may comprise aluminum, steel, or alloys thereof.
  • the finish portion may have a maximum diameter between 20 millimeters and 42 millimeters.
  • the outwardly convex portion may be shaped such that the transition section can bear, for example, an axial compressive load between approximately 800 Newtons and approximately 1000 Newtons without plastically deforming.
  • container top load specifications of beverage containers may be 350 lbs or approximately 1560 Newtons or higher.
  • the shape of the outwardly convex portion may also provide a certain compliance or elastic deformation to absorb a certain level of axial forces and other forces. In this manner, the convex portion may resist permanent plastic deformation and yielding, and may allow for wider manufacturing tolerances. Other axial loads that are higher or lower are also contemplated.
  • a metal beverage container may include a body portion, a neck portion connected with said body portion, and a finish portion.
  • the finish portion may include a threaded portion, a lip portion, and a transition portion coupled between the threaded portion and the lip portion.
  • the transition portion may include an outwardly convex shape.
  • One method of manufacturing a metal beverage container may include forming a body portion, forming a neck portion connected with the body portion, and forming a finish portion connected with the neck portion.
  • the finish portion may be formed by forming a threaded portion, forming a lip portion, and forming a transition portion coupled between the threaded portion and the lip portion.
  • the transition portion may include an outwardly convex shape.
  • FIG. 1 is a side view illustration of an illustrative embodiment of a metal beverage container
  • FIGS. 2-5 are side view illustrations, in cross-section, of illustrative embodiments of top portions of metal beverage containers.
  • FIG. 6 is a flow diagram of an illustrative embodiment of a process of manufacturing a metal beverage container in accordance with the principles of the present invention.
  • Axial loading of a bottle shaped metal beverage container may cause the beverage container to deform. Certain deformations (e.g., plastic or permanent deformations) may be undesirable.
  • a metal beverage container may be designed to withstand certain amounts of axial loading. For example, a thickness of the metal used to form the beverage container may affect the container's ability to bear axial load (e.g., the thicker the metal for a given container design, the greater the ability of the container to withstand axial loads, generally speaking).
  • Metal is often purchased by weight.
  • a thicker beverage container may be associated with increased material and transportation costs.
  • relatively thin (and/or light weight) metal beverage containers capable of withstanding axial loads sufficient to properly seat a closure element (e.g., bottle cap, either twist or pop-off) may be desirable.
  • a metal beverage container 100 may include a body portion 102 , a neck portion 104 and a finish portion 106 , as commonly referred to in the art.
  • the finish portion 106 includes an opening (not shown) that may be used to access an interior of, the beverage container 100 and may receive a closure element 108 with threads 110 to seal the beverage container 100 .
  • a center line to the beverage container 100 is also illustrated. Capping operations may result in loading of the beverage container 110 in the general direction of this centerline.
  • the overall height of the beverage container 100 may be approximately 185 millimeters
  • the overall height of the finish portion 106 may be approximately 20 millimeters
  • the outside diameter of the beverage container 100 at its widest may be approximately 53 millimeters
  • the outside diameter of the finish portion 106 at its widest may be in the range of 20 to 42 millimeters.
  • other dimensions and/or shapes are also contemplated.
  • the metal from which the beverage container 100 is formed in the example of FIG. 1 , is aluminum.
  • suitable metals such as steel and certain alloys (e.g., aluminum-steel alloys, etc.), however, may also be used.
  • a 3000 series aluminum may be utilized.
  • a 3104 series aluminum may be utilized.
  • the aluminum may be annealed or unannealed.
  • the thickness of the metal may vary among the body portion 102 , neck portion 104 , and finish portion 106 , or within any of the portions 102 , 104 , and 106 .
  • the average thickness of the neck portion 104 may be approximately 0.23 millimeters and the average thickness of the finish portion 106 may be approximately 0.33 millimeters.
  • the thickness of the neck portion 104 adjacent to the body portion 102 may be 0.20 millimeters, and the thickness of the neck portion 104 adjacent to the finish portion 106 may be approximately 0.28 millimeters, etc. These thicknesses are illustrative and alternative thicknesses may be utilized.
  • the finish portion 106 of the metal beverage container 100 of FIG. 1 includes a lip portion 202 , a threaded portion 204 , a transition section 206 connecting the lip portion 202 and threaded portion 204 , a tamper evidence bead 208 , and a tamper evidence band receiving portion 210 .
  • the lip portion 202 in this example, includes a curl defining a sealing surface 212 for a closure element.
  • the threaded portion 204 includes threads 214 on which corresponding threads of the closure element may be received.
  • the tamper evidence bead 208 receives a tamper evidence band during closure element application.
  • the tamper evidence band rests on the tamper evidence band receiving portion 218 after it has been separated from the closure element, as understood in the art.
  • a line 216 is shown passing through the transition section 206 connecting the lip portion 202 and threaded portion 204 . As apparent from the figure, the transition section 206 is aligned with the line 216 . Put another way, the transition section 206 is straight.
  • a hinge point 218 may form at the interface between the transition section 206 and the threaded portion 204 .
  • the transition section 206 is shown to be at an angle ⁇ from horizontal.
  • a length SL between the hinge point 218 and centerline 220 of the sealing surface 212 (curl) may range from approximately 3.3 mm and 6.1 mm. The higher the length SL, the axially stronger the transition section 206 as a result of being more vertical. Stresses associated with axial loads may concentrate at this hinge point 218 , thereby causing deformation in the vicinity of the hinge point 218 as well the threads 214 .
  • This deformation may result in (i) an improper seal between the finish portion 106 and the cap and/or (ii) increased opening torque.
  • inclusion of an arc in the transition section 206 helps to account and adjust for variations in manufacturing of the lip portion 202 as variations (e.g., non-uniformity) in height and/or shape of the lip portion 202 may cause different axial compressive forces to be applied to different portions of the lip portion 202 and, consequently, the transition section 206 .
  • the finish portion 106 and the hinge point 218 , or transition sections, as explained above, may be thickened to reduce the tendency to deform under axial loads. Thickening these transition sections, however, may result in heavier and, thus, more costly beverage containers.
  • transition sections such that they have a convex shape or radially outward profile (see FIGS. 3-5 ) improves their ability to distribute and withstand axial loads without plastically (or permanently) deforming.
  • a finish portion of a given thickness and having a convexly shaped transition section may exhibit a reduced tendency to plastically deform under a given axial load compared with a finish portion of the same thickness and having a straight or concavely shaped transition section.
  • a thinner convexly shaped transition section may exhibit the same performance under a given axial load as a thicker straight or concavely shaped transition section.
  • a convexly shaped transition section may result in improved resistance to permanent deformation relative to a straight or concavely shaped transition section.
  • One reason for such an improvement is that the substantial linearity of a straight transition section provides for a linear spring response, whereas the convexly shaped ( FIG. 3 ) or compound curve shaped ( FIGS. 4 and 5 ) transition section provides for a non-linear response to a load applied to the transition section as a result of having a non-linear shape.
  • axial loads of 800 Newtons associated with a filling or capping operation were routinely used on containers having a straight or concavely shaped transition section
  • the same or higher axial loads associated with a filling or capping operation may be routinely used on containers having a convexly shaped transition section (given the same metal thickness) since the convexly shaped transition section may be compliant to offset some of the load.
  • the inclusion of an outwardly convex or compound transition section may allow for an increase in loads used to form threads in an applied closure, which may make thread formation more repeatable during such operations. It should be understood that alternative transition section designs may provide for higher, and possibly significantly higher, axial strength in accordance with the principles of the present invention.
  • Convexly shaped transition sections may be particularly suitable for finish portions having diameters in the range of 26 millimeters to 40 millimeters, for example. Such convex shapes, however, may be used with finish portions of any suitable diameter.
  • an illustrative finish portion 300 of a container includes a lip portion 302 , a threaded portion 304 , a transition section 306 connecting the lip portion 302 and threaded portion 304 , a tamper evidence bead 308 , and a tamper evidence band receiving portion 310 .
  • the lip portion 302 in this example, includes a curl defining a sealing surface 312 adapted to seal against a closure element, such as the closure element 108 of FIG. 1 .
  • the threaded portion 304 includes threads 314 on which corresponding threads of, for example, the closure element 108 may be received.
  • the tamper evidence bead 308 receives a tamper evidence band (not shown) during closure element application. The tamper evidence band rests on the tamper evidence band receiving portion 310 after it has been separated from the closure element.
  • a straight line 316 is shown relative to the transition section 306 connecting the lip portion 302 and the threaded portion 304 .
  • the transition section 306 has a convex shape or radially outward profile. That is, the transition section 306 bulges outward away from the interior of the container. As a result, the angle ⁇ of the transition section 306 may be higher than that of the straight transition section 206 of FIG. 2 .
  • the transition section 306 includes an arc, the transition section 306 is longer than a transition section that is a straight line, such as transition section 206 of FIG. 2 .
  • another illustrative finish portion 400 includes a lip portion 402 , a threaded portion 404 , a transition section 406 connecting the lip portion 402 and threaded portion 404 , and a tamper evidence bead 408 .
  • the lip portion 402 may include a curl defining a sealing surface 410 .
  • the threaded portion 404 includes threads 412 .
  • the tamper evidence bead 408 may have a diameter in the range of 20 to 42 millimeters. Other diameters, however, are also contemplated.
  • a straight line 414 is shown relative to the transition section 406 and connects the lip portion 402 and threaded portion 404 .
  • the transition section 406 has a convex shape or radially outward profile.
  • the transition section may have a thickness in the range of approximately 0.125 to approximately 0.75 millimeters, a radius of curvature in the range of approximately 1.0 to approximately 6.0 millimeters, and an arc length in the range of approximately 1.0 millimeter to approximately 5.0 millimeters. Other thicknesses, radii or curvature, and arc lengths, however, are also contemplated.
  • yet another illustrative finish portion 500 includes a lip portion 502 , a threaded portion 504 , and a transition section 506 connecting the lip portion 502 and threaded portion 504 .
  • the lip portion 502 includes a curl defining a sealing surface 508 .
  • the threaded portion 504 includes threads 510 .
  • a straight line 512 is shown relative to the transition section 506 connecting the lip portion 502 and threaded portion 504 .
  • the transition section 506 has a convex shape or radially outward profile.
  • the compound transition section may have a portion that extends away from and toward the interior of the beverage container.
  • the radius defined by the transition sections 306 , 406 , and 506 may vary.
  • an angle at which the transition section 306 meets both the threaded portion 304 and lip portion 302 varies.
  • the more vertical the transition section 306 the more axial strength.
  • FIG. 5 shows the most vertical transition portion 506 as exemplified by the line 512 , while the transition sections 406 and 306 are more horizontal, respectively, as further exemplified by the lines 414 and 316 .
  • the angle of the transition portion 506 may range from approximately 10 degrees to approximately 45 degrees from vertical (or from approximately 45 degrees to approximately 80 degrees from horizontal).
  • the radius and length of the transition section 306 may be optimized for the overall configuration of the metal beverage container, closure element, lip displacement, and manufacturing processes.
  • Design Arc Finish Peak Force Option Radius Thickness and Displacement 1 1 mm 0.125 mm 146.8 N @ 0.37 mm 2 6 mm 0.125 mm 189.8 N @ 0.53 mm 3 straight 0.125 mm 205.6 N @ 0.61 mm 4 1 mm 0.500 mm 196 N @ 0.43 mm 5 6 mm 0.500 mm 2133 N @ 0.44 mm 6 straight 0.500 mm 2200 N @ 0.55 mm
  • the larger the radius of the arc of the transition section 306 the higher the peak force and displacement. This is, in part, as a result of the transition section 306 being more vertical.
  • the thicker the finish thickness the higher the peak force capabilities, where the peak force and displacement indicates a force and displacement at which the transition section 306 fails or permanently deforms.
  • a finite element analysis shows that a transition that is straight has a peak force and displacement that is higher than a transition section with an arc configured with a radius
  • use of a straight transition portion may make the transition portion susceptible to plastic deformation given that stresses are concentrated at a hinge point, as described in FIG.
  • the transition portion balances strength and compliance or elasticity to provide a metal beverage container that is less susceptible to complications that may arise from manufacturing defects when capped.
  • the process 600 may start at step 602 , where a body portion of the metal beverage container may be formed.
  • the body portion may be shaped as a bottle.
  • a neck portion of the metal beverage container may be formed.
  • the neck portion may be formed using the same material as the body portion.
  • the neck and body portion may be formed on a single piece of material or separate pieces and connected to one another.
  • a finish portion may be formed. In forming the finish portion, the finish portion may be the same material or separate material from the neck and body portions.
  • the finish portion may connected to the neck portion if formed on a separate material.
  • the material of the three portions may have the same or different composition.
  • the finish portion may included a threaded portion, lip portion, and transition portion including an outwardly convex shape coupled between the threaded portion and the lip portion.
  • the transition portion may be a compound shape, where a convex and concave or “s” shaped curve is utilized. Thickness of the material, shape of the transition portion, and other parameters of the transition portion may be of those provided herein.
  • These attributes may include, but are not limited to: cost, strength, durability, life cycle cost, marketability, appearance, packaging, size, serviceability, weight, manufacturability, ease of assembly, etc.
  • embodiments described as less desirable than other embodiments or prior art implementations with respect to one or more characteristics are not outside the scope of the disclosure and may be desirable for particular applications.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Closures For Containers (AREA)
US13/770,835 2012-02-17 2013-02-19 Metal beverage container with improved finish geometry Abandoned US20130220964A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/770,835 US20130220964A1 (en) 2012-02-17 2013-02-19 Metal beverage container with improved finish geometry

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261600074P 2012-02-17 2012-02-17
US13/770,835 US20130220964A1 (en) 2012-02-17 2013-02-19 Metal beverage container with improved finish geometry

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US20130220964A1 true US20130220964A1 (en) 2013-08-29

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US (1) US20130220964A1 (zh)
EP (1) EP2817231A4 (zh)
KR (1) KR20140127327A (zh)
CN (1) CN105121289A (zh)
CA (1) CA2871690A1 (zh)
MX (1) MX2014009940A (zh)
WO (1) WO2013123495A2 (zh)

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US20150329233A1 (en) * 2013-11-12 2015-11-19 Silgan Plastics Llc Plastic Container Neck Configured for Use with a Fitment
USD791593S1 (en) * 2015-07-17 2017-07-11 Cj Cheiljedang Corp. Container for food packing
USD808810S1 (en) 2015-06-01 2018-01-30 The Coca-Cola Company Bottle neck
US20180132673A1 (en) * 2016-11-15 2018-05-17 Colgate-Palmolive Company Dispenser
USD821874S1 (en) * 2012-02-17 2018-07-03 The Coca-Cola Company Bottle
JP2019199307A (ja) * 2019-08-28 2019-11-21 ユニバーサル製缶株式会社 ボトル缶
WO2020158817A1 (ja) * 2019-01-31 2020-08-06 ユニバーサル製缶株式会社 ボトル缶、ボトル缶の製造方法及びボトル缶の設計方法
JP2020125155A (ja) * 2019-01-31 2020-08-20 ユニバーサル製缶株式会社 ボトル缶、ボトル缶の製造方法及びボトル缶の設計方法
US11059619B2 (en) * 2017-08-25 2021-07-13 Toyo Seikan Co., Ltd. Bottle can and bottle can with cap
US11148847B2 (en) 2019-05-01 2021-10-19 Pepsico, Inc. Plastic neck outsert for metal beverage container
JP7126459B2 (ja) 2019-02-04 2022-08-26 アルテミラ製缶株式会社 ボトル缶

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KR20140127327A (ko) 2014-11-03
EP2817231A4 (en) 2016-07-06
WO2013123495A2 (en) 2013-08-22
WO2013123495A3 (en) 2015-06-18
EP2817231A2 (en) 2014-12-31
CA2871690A1 (en) 2013-08-22
CN105121289A (zh) 2015-12-02

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