US20150034586A1 - Reduced gauge bottle cap - Google Patents
Reduced gauge bottle cap Download PDFInfo
- Publication number
- US20150034586A1 US20150034586A1 US14/243,437 US201214243437A US2015034586A1 US 20150034586 A1 US20150034586 A1 US 20150034586A1 US 201214243437 A US201214243437 A US 201214243437A US 2015034586 A1 US2015034586 A1 US 2015034586A1
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- US
- United States
- Prior art keywords
- crown
- panel
- corrugation
- cap
- top portion
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/1406—Septums, pierceable membranes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/1412—Containers with closing means, e.g. 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
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
-
- 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
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
- B65D17/4014—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab and provided with attached means for reclosing or resealing
-
- 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
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/40—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts
- B65D41/42—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts made of relatively-stiff metallic material, e.g. 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
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/36—Closures with frangible parts adapted to be pierced, torn, or removed, to provide discharge openings
-
- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0093—Membrane
Definitions
- the present disclosure relates to caps and crowns for beverage bottles and other containers, and in particular, to a reduced gauge corrugated bottle cap.
- a bottle crown that has corrugation across its top will be stiffer than a non-corrugated crown. Therefore, to achieve the same degree of stiffness of a non-corrugated crown, a corrugated crown may be thinner, or have a lower gauge, of crown material such as steel or tinplate.
- the advantages of corrugation that are implicitly inherent in the crown of the '533 application are made explicit in the present disclosure. The present disclosure, therefore, describes a corrugated crown and the advantages thereof.
- FIG. 1 is an isometric side view illustration of a reduced gauge crown of the present invention.
- FIG. 2A is a top view illustration of the crown of FIG. 1 .
- FIG. 2B is a side cross-section view of the crown of FIG. 2A .
- FIG. 3A is a top view illustration of an alternative embodiment of a crown of the present disclosure.
- FIG. 3B is a side cross-section view of the crown of FIG. 3A .
- FIG. 4A is a top view illustration of another alternative embodiment of a crown of the present disclosure.
- FIG. 4B is a side cross-section view of the crown of FIG. 4A .
- FIG. 1 is an isometric side view illustration of a reduced gauge crown of the present invention.
- Crown 100 includes top portion 110 contiguous with recess 120 which terminates in panel 130 .
- Skirt 140 downwardly extends from top 110 .
- a flange extends obliquely from skirt 140 .
- Alternating flutes 150 and lands 152 are formed on a circumferential portion of skirt 140 .
- Crown 100 and other crowns shown in the figures, is shown as a pry-off type that is opened with a lever.
- 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.
- crown 100 is suitable for use with pull tab type assemblies mounted to panel 130 with effective score lines embossed on crown 100 .
- Panel 130 is recessed, that is, it is lower than top 110 but is contiguous with top 110 by virtue of transition surface 120 , which will be referred to herein for convenience as recess 120 .
- Recess 120 may formed in crown 100 in a variety of suitable way to provide advantageous shapes. For example, in specific exemplary embodiments concentric tiers, grooves or steps are integrally formed in the crown 100 material until the desired depth of panel 130 is obtained, as illustrated in FIG. 1 .
- recess 120 is formed with a smoothly curved surface from top 110 to panel 130 .
- the form of recess 120 functions as ribs or structural reinforcements that, it is surmised, help to stiffen panel 130 against deflection or deformation.
- Skirt 140 descends from top 110 along the external perimeter of crown 100 and in specific exemplary embodiments smoothly merges into downwardly and radially outwardly extending flange.
- the skirt 140 is preferably adapted to be crimped onto the neck of a bottle for sealing.
- Specific exemplary embodiments of skirt 140 are divided into undulating, repeating portions that define the flutes 150 and lands 152 .
- the repeating portions are circumferentially evenly spaced apart such that each flute 150 is identical to all other flutes 150 around the circumference of the crown cap 100 , and each land 152 is identical to all other lands 152 around the circumference of the crown cap 100 .
- the crown cap 100 may include any number of flutes 150 and lands 152 .
- each depicted embodiment is the horizontal cross section of its “A” counterpart through line B-B.
- Each embodiment, designated 2 A/B, 3 A/B and 4 A/B, is characterized by a particular diameter of its panel 130 , as represented by width B 210 , 310 and 410 of each embodiment, respectively, and depth A of recess 120 represented by depths 220 , 320 , and 420 , respectively.
- a specific amount of material strengthening from corrugation is achieve by selecting an embodiment with a particular combination of panel diameter 210 , 310 or 410 , for example, and recess depth 220 , 320 or 420 , for example.
- Exemplary embodiment 3 A/B has panel diameter 210 , which is a relative wide, and recess depth 220 , which is intermediately deep.
- Exemplary embodiment 3 A/B has panel width 310 , which of intermediate width, and recess depth 320 , which is the deepest of the three exemplary embodiments.
- Exemplary embodiment 4 A/B has panel diameter 410 , which is the narrowest of the embodiments, and recess depth 420 , which is the shallowest depth of the three embodiments.
- a combination of panel width 210 , 310 , or 410 , for example, and recess depth 220 , 320 or 420 , for example, is selected to achieve a specific embodiment.
- Corrugation strengthens materials. This is particularly true of laminar materials formed into a sheet or plane.
- a laminar product can use less of a material if the material is corrugated to provide lateral strength.
- a bottle cap is a laminar product in which the sheet material, often steel or tin plate, is shaped to be affixed to the top of a bottle or other container.
- a standard pry-off or twist off cap has a thickness of material that is predominantly determined by considerations of leak prevention and the secureness of the attachment of the cap to the container.
- a reduced gauge corrugated cap comes into play with innovated “pull-off” caps, which have a pull tab assembly attached to the crown as described in the related patent applications.
- the pull tab breaks the cap material and the crown is torn off the bottle using the pull tab.
- a reduced gauge cap facilitates the tear off because the cap material is thin and the tearing action is parallel to the direction of material strengthening provided by the corrugation and therefor the tearing force does not have to overcome the material strengthening of the corrugation.
- Corrugation affords material strengthening perpendicular to the direction of corrugation.
- Corrugation forms may be provided to a bottle cap by a variety means, including without limitation, metal stamping, pressing, embossing and so forth.
- Non-metal crowns of the present disclosure may be formed by injection molding for plastic crowns, or by other suitable means of production.
- the crown caps 100 preferably are formed with steel of increased hardness compared with conventional crown caps presently in commercial production.
- conventional crown caps are often formed of single reduced, T4, tinplate having a thickness of from 0.21 mm to 0.23 mm.
- Such tinplate has an average hardness (that is, the reported hardness value regardless of +/ ⁇ variations) of approximately 61 on a 30T hardness scale, in accordance with ASTM 623.
- Crown caps 100 described herein may be made thinner and lighter weight compared, with the prior art, for example, crown caps 100 may be formed of a material having a thickness of about 0.16 mm to 0.18 mm that have the same or roughly equal performance as conventional, thicker caps.
- crown caps 10 are made with steel having increased hardness.
- the inventor has demonstrated the effectiveness of low gauge crowns having grooves using DR8 (according to ASTM 623) or DR550 (according to EN 10203).
- DR8 accordinging to ASTM 623
- DR550 accordinging to EN 10203.
- other materials such as single reduced tinplate or like material having enhance tempering, tin-free steel having similar properties as those described herein, and the like.
- the crown pops 100 preferably have an average hardness of greater than 62 on the 30T scale (conforming to ASTM 623), more preferably greater than about 65, more preferably greater than about 68, more preferably greater than about 71.
- the embodiments shown in FIG. 1 and FIG. 3A were demonstrated to be effective using steel having a hardness of 73.
- the upper limit of hardness is set by the maximum stress acceptable to the glass bottle during the crimping process or the spring back (which may tend to urge the crimped flanges toward an uncrimped state) associated with harder plate.
- the crown caps 100 may be formed with conventional press equipment, with only minor changes to parts of the tooling to form the structure (such as the grooves, crosses, stars, and dimples). And crown caps 100 may be crimped with conventional equipment, only modified to have a smaller throat compared with existing, conventional crimpers.
- the aspect of the hardness of the crown may be expressed in yield point on a corresponding scale.
- DR8 or DR550 tinplate may has a yield point (in a tensile test) of 550 MFA.
- the inventor believes that the most advantageous crown cap has a combination of one or more of the structured described herein and harder plate as described herein.
- a crown of the present disclosure encompasses crown caps that do not have all of the structure, materials, and/or advantages in this specification.
- crown caps formed according to the present disclosure can be commercially made with up to 25 percent less steel compared with many conventional crown caps, which has corresponding advantages in carbon emissions.
- the savings in steel weight are approximately proportionate to the reduction in metal thickness. Further, even though energy required to cool an individual crown is tiny, the energy required to cool the total number of crowns produced each year (approximately 45 billion, in North America and approximately 300 billion throughout the world) and the corresponding reduction in that energy, it significant.
- tinplate material which, demonstrates an approximate hardness of T-4 on the Rockwell 30T Hardness Scale is preferred tot the present cap (see item 3 in table 1).
- This may be contrasted against the prior art which typically uses tinplate having a hardness of K-3 on the Rockwell scale.
- the preferred softer tinplate material requires less force to open and tear with the opener assembly of the present crown while still providing sufficient sealing of the container content.
- tinplate refers the any material, including tin or tin alloys, from which a brown may be fabricated and does not necessarily mean that the crown is made from tin or a tin alloy.
- inventive subject matter may be referred to herein, individually and/or collectively, by the term “invention” merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in face disclosed.
- inventive concept merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in face disclosed.
- the present disclosure describes a crown for a container opening.
- the crown has a top portion and an inner portion contiguous with the top portion.
- the inner is portion formed into a panel.
- An outer portion contiguous with the top portion is formed into a skirt that descends from the top portion.
- the crown has corrugation formed in the panel.
- the present disclosure also contemplates methods for making the crown described above.
- Methods include the steps of shaping a sheet of crown material to provide a top portion and an inner portion contiguous with the top portion and formed into a panel. An outer portion contiguous with the top portion is formed into a skirt that descends from the top portion.
- the methods also include forming corrugation in the panel.
- the step of forming corrugation in the panel consists of forming a recess that descends from the top portion to the panel in the inner portion.
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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Abstract
Description
- The present disclosure is related to, incorporates by reference, and claims priority from U.S. patent application entitled “Easy-Pull Bottle Cap” filed Oct. 6, 2011 and assigned Ser. No. 13/267,264, and U.S. patent application entitled “Bottle Crown”, Ser. No. 12/903,533, filed Oct. 13, 2010, which in turn claims priority from the U.S. patent application Ser. No. 11/698,247 filed Jan. 24, 2007 (issued as U.S. Pat. No. 8,061,544), which is a continuation-in-part of co-pending PCT patent application of the same title, Serial No.: PCT/US2006/002421 by the same inventor filed Jan. 24, 2006 and entitled EASY-PULL BOTTLE CAP.
- The present disclosure relates to caps and crowns for beverage bottles and other containers, and in particular, to a reduced gauge corrugated bottle cap.
- Published U.S. patent application Ser. No. 12/597,385 to Merino Caballero (“Caballero”) discloses a low gauge crown cap in which the top panel exhibits grooves in various shapes, depending on the embodiment, to achieve corrugation and obtain a crown that has a low gauge of crown material such as steel. Although not prior art due a priority date subsequent to the priority date of the present disclosure, the present inventor acknowledges the Caballero application because it was published prior to the filing date of the present disclosure.
- Related application Ser. No. 12/903,533, and its parent Ser. No. 11/698,247 (issued as U.S. Pat. No. 8,061,544), reference above, disclose a bottle crown that has a seat in which rests a pull tab assembly so that the pull tab assembly is flush with the top of the crown. The seat is formed by means of a depression or recess in the top of the crown. A benefit of the recessed top is that the recess functionally acts to corrugate the top of the crown. As is well understood, corrugation has the advantage of stiffening a sheet of material against forces that are perpendicular to the direction of corrugation. That is, a corrugated sheet is harder to bend than a non-corrugated sheet, at least in certain directions. A bottle crown that has corrugation across its top will be stiffer than a non-corrugated crown. Therefore, to achieve the same degree of stiffness of a non-corrugated crown, a corrugated crown may be thinner, or have a lower gauge, of crown material such as steel or tinplate. The advantages of corrugation that are implicitly inherent in the crown of the '533 application are made explicit in the present disclosure. The present disclosure, therefore, describes a corrugated crown and the advantages thereof.
- The detailed description that follows, by way of non-limiting examples of embodiments, makes reference to the noted drawings in which reference numerals represent the same parts throughout the several views of the drawings, and in which:
-
FIG. 1 is an isometric side view illustration of a reduced gauge crown of the present invention. -
FIG. 2A is a top view illustration of the crown ofFIG. 1 . -
FIG. 2B is a side cross-section view of the crown ofFIG. 2A . -
FIG. 3A is a top view illustration of an alternative embodiment of a crown of the present disclosure. -
FIG. 3B is a side cross-section view of the crown ofFIG. 3A . -
FIG. 4A is a top view illustration of another alternative embodiment of a crown of the present disclosure. -
FIG. 4B is a side cross-section view of the crown ofFIG. 4A . -
FIG. 1 is an isometric side view illustration of a reduced gauge crown of the present invention. Crown 100 includestop portion 110 contiguous withrecess 120 which terminates inpanel 130.Skirt 140 downwardly extends fromtop 110. In some specific embodiments a flange extends obliquely fromskirt 140.Alternating flutes 150 andlands 152 are formed on a circumferential portion ofskirt 140.Crown 100, and other crowns shown in the figures, is shown as a pry-off type that is opened with a lever. 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. Finally,crown 100 is suitable for use with pull tab type assemblies mounted topanel 130 with effective score lines embossed oncrown 100. -
Panel 130 is recessed, that is, it is lower thantop 110 but is contiguous withtop 110 by virtue oftransition surface 120, which will be referred to herein for convenience asrecess 120. Recess 120 may formed incrown 100 in a variety of suitable way to provide advantageous shapes. For example, in specific exemplary embodiments concentric tiers, grooves or steps are integrally formed in thecrown 100 material until the desired depth ofpanel 130 is obtained, as illustrated inFIG. 1 . In alternative embodiments,recess 120 is formed with a smoothly curved surface fromtop 110 topanel 130. The form ofrecess 120 functions as ribs or structural reinforcements that, it is surmised, help to stiffenpanel 130 against deflection or deformation. -
Skirt 140 descends fromtop 110 along the external perimeter ofcrown 100 and in specific exemplary embodiments smoothly merges into downwardly and radially outwardly extending flange. Theskirt 140 is preferably adapted to be crimped onto the neck of a bottle for sealing. Specific exemplary embodiments ofskirt 140 are divided into undulating, repeating portions that define theflutes 150 andlands 152. Preferably, the repeating portions are circumferentially evenly spaced apart such that eachflute 150 is identical to allother flutes 150 around the circumference of thecrown cap 100, and eachland 152 is identical to allother lands 152 around the circumference of thecrown cap 100. It should be understood that thecrown cap 100 may include any number offlutes 150 andlands 152. - Referring to now to
FIGS. 2A and 2B , 3A and 3B and 4A and 4B, the “B” figure of each depicted embodiment is the horizontal cross section of its “A” counterpart through line B-B. Each embodiment, designated 2A/B, 3A/B and 4A/B, is characterized by a particular diameter of itspanel 130, as represented bywidth B recess 120 represented bydepths - A specific amount of material strengthening from corrugation is achieve by selecting an embodiment with a particular combination of
panel diameter depth panel diameter 210, which is a relative wide, andrecess depth 220, which is intermediately deep. Exemplary embodiment 3A/B haspanel width 310, which of intermediate width, andrecess depth 320, which is the deepest of the three exemplary embodiments. Exemplary embodiment 4A/B haspanel diameter 410, which is the narrowest of the embodiments, andrecess depth 420, which is the shallowest depth of the three embodiments. To obtain a desired amount of material strengthening from corrugation, a combination ofpanel width recess depth - Corrugation strengthens materials. This is particularly true of laminar materials formed into a sheet or plane. A laminar product can use less of a material if the material is corrugated to provide lateral strength. A bottle cap is a laminar product in which the sheet material, often steel or tin plate, is shaped to be affixed to the top of a bottle or other container. A standard pry-off or twist off cap has a thickness of material that is predominantly determined by considerations of leak prevention and the secureness of the attachment of the cap to the container.
- Billions of bottle caps are used worldwide and the cost of the caps is largely determined by the amount of material required for the caps. Corrugation allows caps that use less material to have the equivalent strength of a standard thick crown, a corrugated crown is thinner, that is, it has a reduced gauge, in comparison to a standard bottle cap. An advantage of a reduced gauge cap is the money savings obtained by using less material.
- Another advantage of a reduced gauge corrugated cap comes into play with innovated “pull-off” caps, which have a pull tab assembly attached to the crown as described in the related patent applications. The pull tab breaks the cap material and the crown is torn off the bottle using the pull tab. A reduced gauge cap facilitates the tear off because the cap material is thin and the tearing action is parallel to the direction of material strengthening provided by the corrugation and therefor the tearing force does not have to overcome the material strengthening of the corrugation. Corrugation affords material strengthening perpendicular to the direction of corrugation.
- In addition to the structures illustrated in the figures herein, it is understood that other structures will imbue a cap of the present disclosure with the advantages of corrugation and provide a reduced gauge crown for a bottle. For instance, concentric rings, which progress from the top of the skirt toward the center of the panel, and decorative shapes such as stars, brand logos, sports team logos, religious insignia, and the like, formed in the plane of the cap, are embraced in the present disclosure.
- Corrugation forms may be provided to a bottle cap by a variety means, including without limitation, metal stamping, pressing, embossing and so forth. Non-metal crowns of the present disclosure may be formed by injection molding for plastic crowns, or by other suitable means of production.
- The crown caps 100 preferably are formed with steel of increased hardness compared with conventional crown caps presently in commercial production. For example, conventional crown caps are often formed of single reduced, T4, tinplate having a thickness of from 0.21 mm to 0.23 mm. Such tinplate has an average hardness (that is, the reported hardness value regardless of +/−variations) of approximately 61 on a 30T hardness scale, in accordance with ASTM 623. Crown caps 100 described herein may be made thinner and lighter weight compared, with the prior art, for example,
crown caps 100 may be formed of a material having a thickness of about 0.16 mm to 0.18 mm that have the same or roughly equal performance as conventional, thicker caps. These decreases in metal usage are more easily achieved when the structure of crown caps 10 are made with steel having increased hardness. For example, the inventor has demonstrated the effectiveness of low gauge crowns having grooves using DR8 (according to ASTM 623) or DR550 (according to EN 10203). Optionally, the inventor surmises that other materials may be used, such as single reduced tinplate or like material having enhance tempering, tin-free steel having similar properties as those described herein, and the like. - The crown pops 100 preferably have an average hardness of greater than 62 on the 30T scale (conforming to ASTM 623), more preferably greater than about 65, more preferably greater than about 68, more preferably greater than about 71. The embodiments shown in
FIG. 1 andFIG. 3A were demonstrated to be effective using steel having a hardness of 73. The upper limit of hardness is set by the maximum stress acceptable to the glass bottle during the crimping process or the spring back (which may tend to urge the crimped flanges toward an uncrimped state) associated with harder plate. - The crown caps 100 may be formed with conventional press equipment, with only minor changes to parts of the tooling to form the structure (such as the grooves, crosses, stars, and dimples). And
crown caps 100 may be crimped with conventional equipment, only modified to have a smaller throat compared with existing, conventional crimpers. - Because hardness has a relationship to strength as reflected in the yield point, the aspect of the hardness of the crown may be expressed in yield point on a corresponding scale. For example, DR8 or DR550 tinplate may has a yield point (in a tensile test) of 550 MFA. The inventor believes that the most advantageous crown cap has a combination of one or more of the structured described herein and harder plate as described herein. A crown of the present disclosure, however, encompasses crown caps that do not have all of the structure, materials, and/or advantages in this specification.
- According to this description, commercially acceptable crown caps formed according to the present disclosure can be commercially made with up to 25 percent less steel compared with many conventional crown caps, which has corresponding advantages in carbon emissions. The savings in steel weight are approximately proportionate to the reduction in metal thickness. Further, even though energy required to cool an individual crown is tiny, the energy required to cool the total number of crowns produced each year (approximately 45 billion, in North America and approximately 300 billion throughout the world) and the corresponding reduction in that energy, it significant.
- In addition to the various structures described herein, certain advantages over the prior art are bestowed on the present crown by the recommended specifications shown in Table 1.
-
TABLE 1 Items Acceptable Range/Target 1. Appearance Disc properly adhering White liner Complete liner Clean liner Clean crown and ring No rust and scratch for crown and ring Two cut lines on the downward surface of crown Rivet Crown 2. Dimensions Thickness (mm): 0.24-0.28 Inside diameter (mm): 32.08-32.12 Outside diameter (mm): 26.60-26.90 Radius of angle (mm): 1.5-1.9 Number of angels: 21 Ring Diameter (mm): 21.1-21.5 Thickness (mm): 0.28-0.32 Liner Diameter (mm): 20.00-20.50 3. Rockwell Hardness T4 on the Rockwell 30T scale 4. Secure Seal Greater than/equal to 150 PSI for 1 minute 5. Finish Hardness Should not scratch with “H” pencil 6. Sensory No significant differences with an identified control after 12 weeks at 20 degrees C. 7. Lubricant Migration No particles or lubricant should be present 8. Simulated Palletizing CO2 loss should not differ against control caps when stored for 1 week with max weight of 45 Kgs over each bottle 9. Corrosion Maximum corrosion: slight to moderate 10. Odor No off odors detected 11. Pulling Force 2.5 kg of Ring (kg) 12. Composition of Tinplate crown and ring; food Material class non-PVC for liner 13. Package 5000 Crowns per box 14. Pressure (kg) 10 kg 15. Container Loading 1,000 Master Cartons 16. Printing Logo/other design may be printed on the Easy Pull ™ Cap 17. Crown Anti-Oxidation Material used is “food grade” PET; clear, with no odor, 1.2 UM (micrometers) - In particular, a tinplate material which, demonstrates an approximate hardness of T-4 on the Rockwell 30T Hardness Scale is preferred tot the present cap (see item 3 in table 1). This may be contrasted against the prior art which typically uses tinplate having a hardness of K-3 on the Rockwell scale. The preferred softer tinplate material requires less force to open and tear with the opener assembly of the present crown while still providing sufficient sealing of the container content. For the purposes of this disclosure, tinplate refers the any material, including tin or tin alloys, from which a brown may be fabricated and does not necessarily mean that the crown is made from tin or a tin alloy.
- The foregoing description is provided for the purpose of explanation and is not to be construed as limiting the invention. While the invention has been described with reference to preferred embodiments or preferred methods, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Furthermore, although the invention has been described herein with reference to particular structure, methods, and embodiments, the invention is not intended to be limited to the particulars disclosed herein, as the invention extends to all structures, methods and uses that are within the scope of the appended claims. Those skilled in the relevant art, having the benefit of the teachings of this specification, may effect numerous modifications to the invention as described herein, and changes may be made without departing from the scope and spirit of the invention as defined by the appended claims. Furthermore, any features of one described embodiment can be applicable to the other embodiments described herein.
- Such embodiments of the inventive subject matter may be referred to herein, individually and/or collectively, by the term “invention” merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in face disclosed. Thus, although specific embodiments have been illustrated and described herein, it should be appreciated that any arrangement calculated to achieve the same purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, will be apparent to those of skill in the art upon reviewing the above description.
- In summary, the present disclosure describes a crown for a container opening. The crown has a top portion and an inner portion contiguous with the top portion. The inner is portion formed into a panel. An outer portion contiguous with the top portion is formed into a skirt that descends from the top portion. The crown has corrugation formed in the panel.
- The present disclosure also contemplates methods for making the crown described above. Methods include the steps of shaping a sheet of crown material to provide a top portion and an inner portion contiguous with the top portion and formed into a panel. An outer portion contiguous with the top portion is formed into a skirt that descends from the top portion. The methods also include forming corrugation in the panel.
- In specific embodiments the step of forming corrugation in the panel consists of forming a recess that descends from the top portion to the panel in the inner portion.
- The Abstract of the Disclosure is provided to comply with 37 C.F.R. §1.72(b), requiring an abstract that will allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment.
- The description has made reference to several exemplary embodiments. It is understood, however, that the words that have been used are words of description and illustration, rather than words of limitation. Changes may be made within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the disclosure in all its aspects. Although description makes reference to particular means, materials and embodiments, the disclosure is not intended to be limited to the particulars disclosed; rather, the disclosure extends to all functionally equivalent technologies, structures, methods and uses such as are within the scope of the appended claims.
Claims (6)
Priority Applications (1)
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US14/243,437 US20170029172A9 (en) | 2006-01-14 | 2012-07-24 | Reduced gauge bottle cap |
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PCT/US2006/002421 WO2007081349A1 (en) | 2006-01-13 | 2006-01-24 | Easy-pull bottle cap |
US11/698,247 US8061544B2 (en) | 2006-01-14 | 2007-01-25 | Easy-pull crown bottle cap |
US12/903,533 US8276773B2 (en) | 2006-01-14 | 2010-10-13 | Bottle crown with removable frangible portion |
US13/267,264 US8608006B2 (en) | 2006-01-14 | 2011-10-06 | Bottle crown |
PCT/US2012/047949 WO2013052194A1 (en) | 2011-10-06 | 2012-07-24 | Reduced gauge bottle cap |
US14/243,437 US20170029172A9 (en) | 2006-01-14 | 2012-07-24 | Reduced gauge bottle cap |
USPCT/US12/47949 | 2012-07-24 |
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US14/243,437 Abandoned US20170029172A9 (en) | 2006-01-14 | 2012-07-24 | Reduced gauge bottle cap |
US15/048,776 Expired - Fee Related US10618700B2 (en) | 2006-01-14 | 2016-02-19 | Medical vial cap |
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US12/903,533 Active 2026-02-23 US8276773B2 (en) | 2006-01-14 | 2010-10-13 | Bottle crown with removable frangible portion |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9321562B2 (en) | 2006-01-14 | 2016-04-26 | World Bottling Cap Llc | Bottle crown with opener assembly |
US9592936B2 (en) | 2006-01-14 | 2017-03-14 | World Bottling Cap, LLC | Bottle crown with opener assembly |
US10618700B2 (en) | 2006-01-14 | 2020-04-14 | World Bottling Cap, LLC | Medical vial cap |
US9533800B2 (en) | 2014-03-28 | 2017-01-03 | World Bottling Cap, LLC | Bottle crown with opener assembly |
US11046479B2 (en) | 2014-03-28 | 2021-06-29 | World Bottling Cap Llc | Non-metal and hybrid bottle crowns with opener assembly |
US11548683B2 (en) | 2014-03-28 | 2023-01-10 | World Bottling Cap, LLC | Bottle crown with opener assembly |
US10882678B2 (en) * | 2014-06-04 | 2021-01-05 | Gino Rapparini | Reinforcement ring for capsules for obtaining beverages |
Also Published As
Publication number | Publication date |
---|---|
WO2009035472A1 (en) | 2009-03-19 |
US20070181526A1 (en) | 2007-08-09 |
US8276773B2 (en) | 2012-10-02 |
US20170029172A9 (en) | 2017-02-02 |
US20110024381A1 (en) | 2011-02-03 |
US20160271014A1 (en) | 2016-09-22 |
US10618700B2 (en) | 2020-04-14 |
US8061544B2 (en) | 2011-11-22 |
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Legal Events
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AS | Assignment |
Owner name: LIBERMAN, TERRY, MISSOURI Free format text: SECURITY AGREEMENT;ASSIGNOR:WORLD BOTTLING CAP, LLC;REEL/FRAME:032065/0453 Effective date: 20130516 Owner name: SWEENEY, BART, ARIZONA Free format text: SECURITY AGREEMENT;ASSIGNOR:WORLD BOTTLING CAP, LLC;REEL/FRAME:032065/0381 Effective date: 20130516 Owner name: SWEENEY, BART, ARIZONA Free format text: SECURITY INTEREST;ASSIGNOR:WORLD BOTTLING CAP, LLC;REEL/FRAME:032065/0284 Effective date: 20130516 Owner name: SWEENEY, KATHLEEN, ARIZONA Free format text: SECURITY INTEREST;ASSIGNOR:WORLD BOTTLING CAP, LLC;REEL/FRAME:032065/0284 Effective date: 20130516 |
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Owner name: WORLD BOTTLING CAP, LLC, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FRISHMAN, ABE;REEL/FRAME:038286/0327 Effective date: 20140404 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |