WO2014060800A2 - Second generation low gauge crown cap - Google Patents
Second generation low gauge crown cap Download PDFInfo
- Publication number
- WO2014060800A2 WO2014060800A2 PCT/IB2013/000831 IB2013000831W WO2014060800A2 WO 2014060800 A2 WO2014060800 A2 WO 2014060800A2 IB 2013000831 W IB2013000831 W IB 2013000831W WO 2014060800 A2 WO2014060800 A2 WO 2014060800A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crown cap
- crown
- bottle
- corrugations
- panel
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000005028 tinplate Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 235000013361 beverage Nutrition 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 230000009467 reduction Effects 0.000 description 7
- 238000002788 crimping Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/10—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts
- B65D41/12—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts made of relatively stiff metallic materials, e.g. crown caps
-
- 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
- B21D51/44—Making closures, e.g. caps
- B21D51/48—Making crown caps
-
- 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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/10—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts
- B65D41/14—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts made of metallic foil or like thin flexible material
Definitions
- the present invention relates to closures for containers, and more particularly to a fluted crown cap for sealing a bottle or container opening.
- the bottle cap was first produced in the 1890's, based on the invention of William Painter of Baltimore described in U.S. Patent No. 468,226. Painter's invention was a circular steel closure, characterized by circular top, a circular skirt depending downwardly from a periphery of the top, and a downwardly and radially outwardly extending flange extending from a periphery of the skirt.
- the flange was formed originally with 24 teeth (or corrugations) to enable crimping of the crown to the bottle neck, later reduced to a standard of 21.
- a cork seal with a paper backing was provided as liner on an inside surface of the crown, to prevent contact between the metal cap and a liquid enclosed in the bottle.
- a lightweight, crimp-type crown cap for application to a glass beverage bottle comprises a shell formed of a material comprising steel tinplate.
- the shell includes a round panel having an upper surface, a lower surface and a peripheral edge.
- a skirt depends downwardly from the peripheral edge of the panel, the skirt having fewer than 21 corrugations, wherein the corrugations are adapted to be crimped to affix the crown cap to a rim of a bottle opening.
- a circular groove is formed in the panel, defining a downwardly concave portion on the upper surface of the panel and a corresponding downwardly convex portion on the lower surface of the panel, and the circular groove is arranged to align with the rim of the bottle.
- a liner is disposed on the lower surface of the panel.
- Embodiments of the crown cap preferably include, ten to nineteen corrugations defined by alternate flutes and lands.
- the flutes and lands define non- contact zones and contact zones, respectively, wherein the contact zones are adapted to make sealing contact with a bead surrounding the rim of the bottle when the crown cap is affixed to the bottle.
- a ratio of a circumferential length of the contact zone to a circumferential length of a non-contact zone is preferably greater than 1.0.
- a thickness of the tinplate material is preferably less than 0.17mm, and more preferably less than 0.14mm.
- Fig. 1A is a partial cutaway side view of an embodiment of a crown cap according to the present invention.
- Fig. IB is a top plan view of the crown cap of Fig. 1 A;
- Fig. 1 C is a top perspective view of the crown cap of Fig. 1 A;
- Fig. ID is a bottom perspective view of the crown cap of Fig. 1A;
- Figs. 2A-2I show a top plan view of further embodiments of crown caps according to the present invention.
- Fig. 3 is a cross sectional view of the crown cap of Fig. 1 A crimped onto a bottle.
- Fig. 4A is a cross sectional schematic view showing a top loading effect on a conventional crown cap.
- Fig. 4B is a cross sectional schematic view showing a top loading effect on an embodiment of a crown cap of the present invention.
- Fig. 5 is a detailed partial bottom perspective view of the corrugations of an embodiment of a crown cap of the present invention.
- Fig. 6 is a perspective view of a corrugating die for forming a crown cap to the present invention.
- Figs. 7A-7I show a top plan view of further embodiments of corrugating dies according to the present invention.
- Fig. 8A is a schematic illustration of a crown press tool for forming crown caps, shown in a "stand-by" configuration.
- Fig. 8B is a schematic illustration of the crown press tool of Fig. 8A, shown in a drawing operation.
- a low-gauge crown cap 10 of the present invention includes a shell 100 and a liner 200.
- the shell 100 includes a circular panel 1 10, a skirt 120 and a flange 130.
- the skirt 120 extends downward and outward from a periphery of the circular panel 1 10, and the flange 130 extends obliquely from the skirt 120.
- Corrugations 132 are formed on a circumferential portion of the flange 130, the corrugations 132 comprising alternating flutes 134 and lands 136.
- the skirt 120 and flange 130 are adapted to be crimped onto the neck of a bottle for closing and sealing the bottle.
- the crown cap 10 is shown in the figures as a pry-off type that is opened with a lever or bottle opener.
- the present invention also encompasses a twist- off type (not shown in the figures) that is opened by twisting, as will be understood by persons familiar with crown cap technology.
- a crown cap 10 of the present invention may be crimped onto a bottle top in a conventional manner. Crown cap 10 is shown applied to a bottle 50 having a rim 52 and a bead 54. With the liner 200 disposed on its underside, crown cap 10 is placed on the bottle 50 such that groove 1 12 is located over the bottle rim 52. Upon crimping of flutes 134 relative to bead 54, the liner 200 is squeezed between and deformed by the underside of groove 1 12 and rim 52.
- the crimping process for applying any of the crown caps described herein to a bottle preferably is performed by a ring-like crimping tool that contacts the outer edge or edge region of the flange 130, thereby avoiding or diminished scuffing or marring of flange 130 and diminishing force applied to bead 54.
- the circular panel 1 10 is preferably a substantially flat planar panel.
- the flat planar panel improves performance of the crown cap by reducing the "spring back effect," which is a tendency of the crimped corrugations to return to their original un-crimped state, creating a tendency for the crown cap to become loosened from a bottle.
- this tendency of the crimped corrugations to return to their original un-crimped state results from material stiffness and poor resiliency characteristics associated with the higher temper material of a thinner tinplate. That is, simply stated, a thinner tinplate may be more spring-like in nature than a thicker material simply owing to material requirements associated with forming the thinner plate, resulting in a greater tendency to some degree of resistance in holding a crimped shape.
- the upwardly convex top of a conventional crown cap shown in Fig. 4A contributes to this effect when a load is applied to the top of the crown cap. That is, the material tendency of the crown cap to spring back to its uncrimped state may be exacerbated by a downward force or load applied to the top of the crown cap.
- the downward force on the cap results in a "levering" of the crown cap about the bottle rim, tending to urge the corrugations outward and away from the bottle rim, potentially loosening the cap from the bottle or reducing the effectiveness of its seal.
- this undesirable effect of the downward force or load applied to the crown cap is reduced or eliminated.
- a circular groove 1 12 is formed in the panel 1 10, defining a downwardly concave portion 1 12a on the upper surface of the panel 1 10 and a corresponding downwardly convex portion 1 12b on the lower surface of the panel 1 10. Stated differently, the circular groove 1 12 may be considered to be a downwardly protruding circular bead.
- the circular groove 1 12 is generally concentric with the outer perimeter of the crown cap 10, and the circular groove 1 12 is arranged to align with top surface of the rim 52 of the bottle 50 when the crown cap 10 is crimped onto the bottle 50.
- the groove 1 12 presses the liner 200 against the top surface of the rim 52 increasing the contact surface between the liner 200 and the rim 52, and thereby increasing the sealing, and increasing the bottle cap performance.
- the circular groove 1 12 is preferably arranged to coincide with the sealing portion 202 of the liner 200 if such is provided.
- the liner 200 is provided on the inside surface of the circular panel 1 10.
- a sealing element 202 may be formed on the liner as a downwardly protruding feature or features arranged to contact with a top surface of the rim 52 of the bottle 50. After crimping the crown cap 10 onto the bottle top, the liner 200 contacts and seals against the rim 52 of the bottle 50.
- the liner 200 may be a conventional, thermoformed, single or dual lip or bead liner such as is available from SACMI IMOLA (as shown in the figures), as will be understood by persons familiar with crown cap technology.
- the present invention is not limited to the choice or presence of a liner, and encompasses other liner configurations, such as a conventional, single bead liner (not shown in the figures) or no bead, as well as other materials, such as PVC and conventional PVC substitutes.
- the sealing element 202 of the liner 200 as shown includes an inboard and outboard lip for contact with an inboard and outboard portion of the bottle.
- the bead of the single bead liner preferably engages the inboard portion or corner region of the rim 52 of the bottle 50.
- the crown cap 10 of the present invention is formed with fewer than the conventional 21 corrugations, preferably having ten (10) to nineteen (19) corrugations.
- the crown cap 10 is shown embodied with nineteen (19) corrugations.
- the crown cap 10 is shown embodied with ten (10) corrugations.
- a reduction in the number of corrugations has been found to reduce the "spring back" effect described above, and increases the surface contact between the lands 136 and the bead 54. That is, by reducing the number of corrugations 132, the surface contact between the land 136 and the bead 54 surrounding the rim is increased. Increasing the contact surface will improve the "bite" of the metal of the shell and the bottle, hence the internal pressure resistance of the crown cap.
- the ratio of the circumferential length of the contact zone (the lands 136) to the circumferential length of a non-contact zone (the flutes 134) increases, and will be greater than 1.0.
- increasing the relative length of the lands 136 (versus the flutes 143) will increase the contact perimeter between the cap and the bottle.
- the crown cap 10 may be formed of a harder or higher temper tinplate, in turn allowing a thinner gauge of tinplate to be used, resulting in a reduction in the material required and a corresponding reduction in cost to manufacture the crown caps 10.
- the crown cap 10 may be formed with ten (10) to nineteen (19) corrugations, and may be formed of a high temper tinplate material of a thickness less than 0.17mm (more preferably between 0.12mm and 0.15mm), such as a double reduction tinplate having a temper of DR9 (according to the ASTM A623-83 Standard Specification for TIN MILL PRODUCTS) or higher.
- the corrugations 132 comprising alternating flutes 134 and lands 136 are shown in greater detail.
- the flutes 134 and lands 136 form alternately disposed non-contact zones (the flutes 134) and contact zones (the lands 136), wherein the contact zones (lands 136) are adapted to make sealing contact with the a bead 54 surrounding the rim 52 of the bottle 50 when the crown cap 10 is affixed to the bottle 50.
- a ratio of a circumferential length a of the contact zones to a circumferential length b of the non-contact zones is greater than 1. That is, the contact zone is longer in its extent along the bottle top bead than the non-contact zone.
- the corrugating die 300 is a die element configured for forming the skirt and corrugated flange of a crown cap of the present invention.
- the corrugating die 300 is a generally cylindrical die element having top 310, a bottom 320 and a cylindrical inner wall 330 defining a hollow interior.
- a top rim of the corrugating die 300 and an adjacent portion of the inner wall 330 are formed with a plurality of notches 332 separated by teeth 334, corresponding to the flutes and lands of a crown cap that will be formed by the corrugating die 300.
- the corrugating die 300 is configured to form, in a pressing operation, a crown cap having a substantially planar top surface, a circular notch formed proximately to an outer periphery of the planar top surface, and a skirt depending downwardly from the planar top surface and having a plurality of flutes and lands defined by the plurality of teeth and notches.
- the corrugating die 300 shown in Fig. 6 is configured to form nineteen (19) corrugations or flutes. Additional embodiments are shown in Figs. 7A-7I, having ten (10) to eighteen (18) corrugations or flutes, respectively.
- a corrugating die 300 is used in conjunction with a crown press tool 400 for forming the crown caps.
- the corrugating die 300 can be considered as the most important element of the crown press tool, as it is the corrugating die 300 which defines the shape of the crown caps which are formed.
- the corrugating die 300 should be made from a non-deforming steel and should be pack hardened to avoid scaling of the die.
- a crown press tool 400 comprises, in relevant part, an upper forming punch 402, blanking punch 404, lower forming punch 406, a blanking die 408, the corrugating die 300 and a presser 410.
- a blank that is a sheet of material for forming the crown cap, such as a tinplate or steel sheet 420, is placed in the crown press tool 400 as shown, between the upper and lower tool elements.
- the upper forming punch 402 is lowered until the steel sheet 420 becomes positioned in the same plane as the blanking die 408, corrugating die 300 and presser 410.
- the upper forming punch 402 presses the steel sheet 420 against the corrugating die 300 and the presser 410 to form the crown cap corrugations. At this point, the crown is embossed into the steel sheet 420, although the crown cap is not yet "cut out” from the sheet.
- blanking punch 404 is pressed downward to cut the formed crown cap from the steel sheet 420, against the blanking die 408. That is, the blanking punch 404 and blanking die 408 are used to remove the formed crown cap from the steel sheet 420. The formed and cut crown cap is then expelled from the crown press tool 400, by operation of a lower spring system in conjunction with air jets.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2889308A CA2889308A1 (en) | 2012-10-17 | 2013-05-02 | Second generation low gauge crown cap |
BR112015008637A BR112015008637A8 (en) | 2012-10-17 | 2013-05-02 | Second-generation low-measure crown cap |
CN201380054017.9A CN104870328A (en) | 2012-10-17 | 2013-05-02 | Second generation low gauge crown cap |
US14/436,675 US20160107802A1 (en) | 2012-10-17 | 2013-05-02 | Second generation low gauge crown cap |
CR20150176A CR20150176A (en) | 2012-10-17 | 2015-03-30 | SECOND GENERATION THIN CROWN COVER |
IN4203DEN2015 IN2015DN04203A (en) | 2012-10-17 | 2015-05-18 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261714868P | 2012-10-17 | 2012-10-17 | |
US61/714,868 | 2012-10-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2014060800A2 true WO2014060800A2 (en) | 2014-04-24 |
WO2014060800A3 WO2014060800A3 (en) | 2015-08-13 |
Family
ID=50488834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2013/000831 WO2014060800A2 (en) | 2012-10-17 | 2013-05-02 | Second generation low gauge crown cap |
Country Status (9)
Country | Link |
---|---|
US (1) | US20160107802A1 (en) |
CN (1) | CN104870328A (en) |
BR (1) | BR112015008637A8 (en) |
CA (1) | CA2889308A1 (en) |
CL (1) | CL2015000267A1 (en) |
CR (1) | CR20150176A (en) |
IN (1) | IN2015DN04203A (en) |
PE (1) | PE20151320Z (en) |
WO (1) | WO2014060800A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700062510A1 (en) * | 2017-06-07 | 2018-12-07 | Pelliconi & C Spa | METHOD FOR THE REALIZATION OF A PLUG, THE CAP OBTAINED AND MEANS FOR THE IMPLEMENTATION OF THE METHOD. |
IT202100025805A1 (en) * | 2021-10-08 | 2023-04-08 | Sacmi | CROWN CLOSURE AND MOLD TO MAKE IT |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US468226A (en) * | 1892-02-02 | Bottle-sealing device | ||
US1607091A (en) * | 1924-06-09 | 1926-11-16 | Anthony F G Lucas | Bottle cap |
US1706561A (en) * | 1927-03-05 | 1929-03-26 | Tilt Top Cap Company | Bottle cap |
US2048062A (en) * | 1932-06-07 | 1936-07-21 | Crown Cork & Seal Co | Crown cap and apparatus for forming same |
NL45798C (en) * | 1933-10-20 | |||
US2196877A (en) * | 1937-01-27 | 1940-04-09 | Spengrey Cap Corp | Closure |
US3122254A (en) * | 1960-12-08 | 1964-02-25 | Hagmann | Crown-type sealing closure |
US4405058A (en) * | 1981-02-13 | 1983-09-20 | American Can Company | Container |
US5360676A (en) * | 1992-04-06 | 1994-11-01 | Kawasaki Steel Corporation | Tin mill black plate for canmaking, and method of manufacturing |
PE20081220Z (en) * | 2007-07-06 | 2008-11-01 | Packaging Products Del Peru Sa | REINFORCED CROWN COVER |
US8322549B2 (en) * | 2008-04-22 | 2012-12-04 | Crown Packaging Technology, Inc. | Twist off crown |
-
2013
- 2013-05-02 CN CN201380054017.9A patent/CN104870328A/en active Pending
- 2013-05-02 US US14/436,675 patent/US20160107802A1/en not_active Abandoned
- 2013-05-02 CA CA2889308A patent/CA2889308A1/en not_active Abandoned
- 2013-05-02 BR BR112015008637A patent/BR112015008637A8/en not_active Application Discontinuation
- 2013-05-02 WO PCT/IB2013/000831 patent/WO2014060800A2/en active Application Filing
-
2015
- 2015-02-04 CL CL2015000267A patent/CL2015000267A1/en unknown
- 2015-03-30 CR CR20150176A patent/CR20150176A/en unknown
- 2015-05-18 IN IN4203DEN2015 patent/IN2015DN04203A/en unknown
- 2015-06-03 PE PE2015000739U patent/PE20151320Z/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
IN2015DN04203A (en) | 2015-10-16 |
CL2015000267A1 (en) | 2015-08-14 |
WO2014060800A3 (en) | 2015-08-13 |
BR112015008637A2 (en) | 2017-07-04 |
CN104870328A (en) | 2015-08-26 |
BR112015008637A8 (en) | 2021-06-08 |
CA2889308A1 (en) | 2014-04-24 |
PE20151320Z (en) | 2015-10-25 |
US20160107802A1 (en) | 2016-04-21 |
CR20150176A (en) | 2015-07-30 |
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