US20160107802A1 - Second generation low gauge crown cap - Google Patents

Second generation low gauge crown cap Download PDF

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Publication number
US20160107802A1
US20160107802A1 US14/436,675 US201314436675A US2016107802A1 US 20160107802 A1 US20160107802 A1 US 20160107802A1 US 201314436675 A US201314436675 A US 201314436675A US 2016107802 A1 US2016107802 A1 US 2016107802A1
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US
United States
Prior art keywords
crown cap
crown
bottle
corrugations
panel
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
US14/436,675
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English (en)
Inventor
Alfredo Abel Merino
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.)
PACKAGING PRODUCTS DEL PERU SA
Original Assignee
PACKAGING PRODUCTS DEL PERU SA
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 PACKAGING PRODUCTS DEL PERU SA filed Critical PACKAGING PRODUCTS DEL PERU SA
Priority to US14/436,675 priority Critical patent/US20160107802A1/en
Assigned to PACKAGING PRODUCTS DEL PERU S.A. reassignment PACKAGING PRODUCTS DEL PERU S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MERINO, Alfredo Abel
Publication of US20160107802A1 publication Critical patent/US20160107802A1/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
    • 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. Pat. 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 bottle opener was required to pry the cap from the bottle.
  • the basic metal crown cap has not conceptually changed from that time.
  • the inventor of the present invention has identified certain characteristics or effects which impact on the ability to fashion a crown cap from thinner material.
  • crown cap Further improvements in the design and structure of a crown cap, including further reduction in material thickness and weight, are desired.
  • 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 0.17 mm, and more preferably less than 0.14 mm.
  • FIG. 1A is a partial cutaway side view of an embodiment of a crown cap according to the present invention.
  • FIG. 1B is a top plan view of the crown cap of FIG. 1A ;
  • FIG. 1C is a top perspective view of the crown cap of FIG. 1A ;
  • FIG. 1D is a bottom perspective view of the crown cap of FIG. 1A ;
  • FIGS. 2A-21 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. 1A 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-71 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 110 , a skirt 120 and a flange 130 .
  • the skirt 120 extends downward and outward from a periphery of the circular panel 110 , 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 112 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 112 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 110 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 112 is formed in the panel 110 , defining a downwardly concave portion 112 a on the upper surface of the panel 110 and a corresponding downwardly convex portion 112 b on the lower surface of the panel 110 .
  • the circular groove 112 may be considered to be a downwardly protruding circular bead.
  • the circular groove 112 is generally concentric with the outer perimeter of the crown cap 10 , and the circular groove 112 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 112 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 112 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 110 .
  • 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. In the embodiment of FIGS. 1A-1C , the crown cap 10 is shown embodied with nineteen (19) corrugations. In the embodiment of FIG. 2 , 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 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 0.17 mm (more preferably between 0.12 mm and 0.15 mm), 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Sealing Of Jars (AREA)
US14/436,675 2012-10-17 2013-05-02 Second generation low gauge crown cap Abandoned US20160107802A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/436,675 US20160107802A1 (en) 2012-10-17 2013-05-02 Second generation low gauge crown cap

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261714868P 2012-10-17 2012-10-17
US14/436,675 US20160107802A1 (en) 2012-10-17 2013-05-02 Second generation low gauge crown cap
PCT/IB2013/000831 WO2014060800A2 (fr) 2012-10-17 2013-05-02 Capsule-couronne de faible calibre de deuxième génération

Publications (1)

Publication Number Publication Date
US20160107802A1 true US20160107802A1 (en) 2016-04-21

Family

ID=50488834

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/436,675 Abandoned US20160107802A1 (en) 2012-10-17 2013-05-02 Second generation low gauge crown cap

Country Status (9)

Country Link
US (1) US20160107802A1 (fr)
CN (1) CN104870328A (fr)
BR (1) BR112015008637A8 (fr)
CA (1) CA2889308A1 (fr)
CL (1) CL2015000267A1 (fr)
CR (1) CR20150176A (fr)
IN (1) IN2015DN04203A (fr)
PE (1) PE20151320Z (fr)
WO (1) WO2014060800A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200180820A1 (en) * 2017-06-07 2020-06-11 Pelliconi & C. S.P.A. Metal closure for a container, method for making the same and method for capping a container with the same
IT202100025805A1 (it) * 2021-10-08 2023-04-08 Sacmi Chiusura a corona e stampo per realizzarla

Citations (9)

* Cited by examiner, † Cited by third party
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
US2195698A (en) * 1933-10-20 1940-04-02 Karl Haggenmiller Closure for bottles and receptacles
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
US20100326949A1 (en) * 2007-07-06 2010-12-30 Crown Packaging Technology Inc. Low gauge crown cap

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2048062A (en) * 1932-06-07 1936-07-21 Crown Cork & Seal Co Crown cap and apparatus for forming same
US8322549B2 (en) * 2008-04-22 2012-12-04 Crown Packaging Technology, Inc. Twist off crown

Patent Citations (9)

* Cited by examiner, † Cited by third party
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
US2195698A (en) * 1933-10-20 1940-04-02 Karl Haggenmiller Closure for bottles and receptacles
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
US20100326949A1 (en) * 2007-07-06 2010-12-30 Crown Packaging Technology Inc. Low gauge crown cap

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200180820A1 (en) * 2017-06-07 2020-06-11 Pelliconi & C. S.P.A. Metal closure for a container, method for making the same and method for capping a container with the same
US11702250B2 (en) * 2017-06-07 2023-07-18 Pelliconi & C. S.P.A. Metal closure for a container, method for making the same and method for capping a container with the same
IT202100025805A1 (it) * 2021-10-08 2023-04-08 Sacmi Chiusura a corona e stampo per realizzarla
WO2023057892A1 (fr) * 2021-10-08 2023-04-13 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Capsule-couronne et moule pour la fabrication de la capsule-couronne

Also Published As

Publication number Publication date
CR20150176A (es) 2015-07-30
CN104870328A (zh) 2015-08-26
IN2015DN04203A (fr) 2015-10-16
PE20151320Z (es) 2015-10-25
WO2014060800A2 (fr) 2014-04-24
BR112015008637A8 (pt) 2021-06-08
CL2015000267A1 (es) 2015-08-14
CA2889308A1 (fr) 2014-04-24
BR112015008637A2 (pt) 2017-07-04
WO2014060800A3 (fr) 2015-08-13

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AS Assignment

Owner name: PACKAGING PRODUCTS DEL PERU S.A., PERU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MERINO, ALFREDO ABEL;REEL/FRAME:035436/0091

Effective date: 20120823

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION