US20190329939A1 - Metal Closure with Low Pressure Engagement Lugs - Google Patents
Metal Closure with Low Pressure Engagement Lugs Download PDFInfo
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- US20190329939A1 US20190329939A1 US16/507,966 US201916507966A US2019329939A1 US 20190329939 A1 US20190329939 A1 US 20190329939A1 US 201916507966 A US201916507966 A US 201916507966A US 2019329939 A1 US2019329939 A1 US 2019329939A1
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- US
- United States
- Prior art keywords
- lugs
- closure
- lug
- container
- lower edge
- 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
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
-
- 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
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0471—Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
- B65D43/0231—Removable lids or covers without integral tamper element secured by rotation only on the outside, or a part turned to the outside, of the mouth of the container
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00064—Shape of the outer periphery
- B65D2543/00074—Shape of the outer periphery curved
- B65D2543/00092—Shape of the outer periphery curved circular
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00259—Materials used
- B65D2543/00277—Metal
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00527—NO contact
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
Definitions
- the present invention relates generally to the field of closures.
- the present invention relates specifically to a metal closure with multiple thread engaging lugs.
- One embodiment of the invention relates to a metal closure having multiple thread engaging lugs, and in one embodiment the lug design is configured to decrease the pressure exerted by the closure lugs on the neck finish of the container.
- One embodiment of the invention relates to a metal closure having a top wall, a skirt and a plurality of lugs.
- the skirt extends downwards from a peripheral edge of the top wall. A first end of the skirt is attached to the top wall. A second end of the skirt is defined by a lower edge. The lower edge is radially defined between an exterior surface and an interior surface.
- the closure includes a plurality of radially inwardly extending lugs located at positions about the lower edge. The interior surface of the lower edge at the positions of the lugs extend radially inwards relative to the interior surface of the lower edge of the skirt adjacent the lugs; The plurality of lugs occupy at least 25% of the length of the perimeter of the lower edge.
- a metal closure having a top wall, a sidewall, and a plurality of lugs.
- the top wall has a center point that lies along a central axis.
- the top wall is concentrically disposed about the central axis.
- the sidewall extends downward along its length from a peripheral edge of the top wall to a lower edge.
- the plurality of lugs, the top wall, and sidewall are formed from a single contiguous piece of metal.
- the lugs are deformed sections the sidewall that extend radially inwards towards the central axis. Adjacent lugs are separated from each other by undeformed portions of the sidewall. Adjacent lugs are separated from each other by undeformed portions of the sidewall.
- Each lug has a first end and a second end spaced from the first end in the circumferential direction. The angular distance between the first end and second end of each lug as measured from the central axis is at least 30°.
- a metal closure having a top wall, a skirt, and a plurality of lugs.
- the skirt extends downward from a peripheral edge of the top wall.
- the skirt includes a lower edge. At least five lugs are formed at the lower edge of the skirt.
- FIG. 1 is a top perspective view of a closure according to an exemplary embodiment.
- FIG. 2 is a bottom perspective view of a closure according to an exemplary embodiment.
- FIG. 3 is a bottom plan view of a closure according to an exemplary embodiment.
- FIG. 4 is a container according to an exemplary embodiment.
- FIG. 5 is a diagram showing the threaded neck of the container of FIG. 4 according to an exemplary embodiment.
- FIG. 6 is a sectional view taken along line 6 - 6 showing a top perspective view of the engagement surface of the lugs of the closure of FIG. 1 according to an exemplary embodiment.
- FIG. 7 is a perspective view of a lug bushing according to an exemplary embodiment.
- FIG. 8 is a perspective view of a lug tool according to an exemplary embodiment.
- FIG. 9 is a detailed view of a portion of the lug bushing of FIG. 7 according to an exemplary embodiment.
- FIG. 10 is a detailed view of a portion of the lug tool of FIG. 8 according to an exemplary embodiment.
- the metal closure discussed herein includes a plurality of lugs (e.g., five or more lugs) that have an increased width such that the sealing force is more evenly distributed around the neck of the container, thereby decreasing the pressure exerted on the container neck by the closure.
- the container sealed by the closure is formed from a plastic material such as polyethylene terephthalate.
- the plastic material of the container may be softened (e.g., by heat from a hot-fill process, steam retort, pasteurization, etc.), and the lower pressure lug design discussed herein acts to decrease or prevent deformation of the plastic material of the container neck that may otherwise be caused by a closure with a different, higher pressure lug design.
- Closure 10 includes a top wall 12 , and a sidewall or skirt 14 extending downward from a peripheral edge of skirt 14 .
- Skirt 14 has a lower edge 16 that extends in a radial direction between an inner surface 13 and an outer surface 15 .
- closure 10 is formed from a single contiguous piece of metal.
- Closure 10 includes a plurality of engagement lugs, shown as lugs 18 , formed at lower edge 16 .
- Lugs 18 extend radially inward from the lower edge 16 , and are formed by deforming a curled, rolled or crimped portion of the lower edge 16 .
- lugs 18 are also formed from sections of the skirt 14 that have been deformed to extend radially inwards towards the central axis of the closure 10 , with adjacent lugs 18 separated from each other by undeformed portions of the skirt 14 .
- lugs 18 are also formed from the same single contiguous piece of metal that forms the rest of the closure 10 .
- the inner surface 13 of the lower edge 16 extends radially inwards from the inner surface 13 of those portions of the lower edge 16 about which no lugs 18 are formed. Additionally, in various embodiments, at those locations along the lower edge 16 where the lugs 18 are formed, the width of the lower edge 16 in a radial direction is greater than the width of the lower edge 16 in a radial direction at locations at which lugs 18 are not formed.
- closure 10 includes more than four lugs 18 , and in one such embodiment closure 10 includes five lugs 18 .
- Closure 10 includes a plurality of non-lugged, curved sections 20 located between each lug 18 . The curvature of the non-lugged, curved sections 20 generally mirrors the curvature of the peripheral edge of the top wall 12 .
- closure 10 includes more than four non-lugged, curved sections 20 , and in one such embodiment, closure 10 includes five non-lugged, curved sections 20 .
- the lugs 18 are formed about the lower edge 16 of the skirt 14 such that none of the lugs 18 lie diametrically opposite each other.
- each lug 18 has a length generally in the circumferential direction shown as L 1 .
- L 1 is between 5 and 15 percent of the perimeter length of lower edge 16 .
- L 1 is between 0.5 inches and 1.5 inches, and in a specific embodiment, L 1 is about 0.75 inches. In one such embodiment, the diameter of closure 10 is 63 mm.
- each lug 18 defines an angle B relative to the center point of closure 10 .
- Angle B is defined between a first lug end 25 and a second lug end 26 spaced from the first lug end 25 in a circumferential direction.
- the angular distance between the first lug end 25 and the second lug end 26 i.e. angle B, is between 30 degrees and 50 degrees, specifically is between 35 degrees and 45 degrees and more specifically between 38 degrees and 42 degrees.
- angle B is at least 30 degrees.
- each lug 18 increases the contact area with the neck 32 of the container 30 by approximately 72% as compared to a standard four lug metal closure.
- the increased length L 1 of lugs 18 and the increased number of lugs 18 as compared to a standard four lug closure act to better distribute sealing forces around the neck 32 of the container 30 sealed by closure 10 , and in some embodiments, this decrease in force acts to limit distortion of the container neck 32 .
- closure 10 is configured to seal a container such as container 30 shown in FIG. 4 .
- Container 30 includes a neck 32 defining an opening 34 .
- Threading 36 is formed on the outer surface of neck 32 .
- both the container 30 and the threading 36 are formed from a plastic material such as, but not limited to polyethylene terephthalate.
- An inner surface of container 30 defines a contents cavity 38 that may hold a variety of container contents including various food products.
- lugs 18 of closure 10 engage threading 36 to attach closure 10 to neck 32 of container 30 .
- closure 10 includes a gasket material 22 that forms a hermetic seal with the upper rim of neck 32 during sealing.
- Gasket material 22 is located on the underside of top wall 12 , surrounding the peripheral edge of the underside of the top wall 12 from which the skirt 14 extends. In various embodiments, the gasket material 22 may also surround the inner corner formed at the juncture between the underside of the top wall 12 and the interior surface of the downwardly extending skirt 14 .
- Gasket material 22 may be a deformable polymer material, such as a thermoplastic elastomer material, that forms a seal with container neck 32 upon application of closure 10 .
- threading 36 includes a plurality of threads 40 having an upper surface 48 and a lower surface 49 .
- container 30 includes one thread 40 for each lug 18 of closure 10 .
- container 30 includes five threads 40 .
- Threads 40 are shaped and positioned to allow closure 10 to be threaded on and off of neck 32 and also facilitate the lower pressure sealing provided by closure 10 .
- Threads 40 have a thread pitch angle or beta helix angle shown by angle A. In various embodiments, angle A is between 5 degrees and 7 degrees, specifically is about 6 degrees and more specifically is 6 degrees, 6 minutes.
- Threads 40 have a front portion 42 that overlaps the rear portion 44 of the adjacent thread 40 at overlap 46 . Threads 40 are sized and arranged such that overlap portion 46 facilitates threading of closure 10 on to container 30 .
- FIG. 6 is a sectional view of the closure 10 taken along line 6 - 6 of FIG. 1 and shows a top perspective view of the upper surface of the lugs 18 .
- each lug 18 includes a thread engagement surface 19 that extends along the upper surface of the lug 18 .
- the thread engagement surface 19 of each lug 18 is formed having an angle D, as measured between the thread engagement surface 19 and a plane along which the lower edge 16 of the closure 10 lies. In general the angle D of the thread engagement surface 19 of the lugs 18 matches the angle A of the threads 40 .
- FIG. 7 shows lug bushing 100
- FIG. 8 shows lug tool 102
- lug bushing 100 includes an inner engagement surface 104 for each lug 18 to be formed
- lug tool 102 includes an outer engagement surface 106 for each lug 18 to be formed.
- a portion of skirt 14 is positioned between surfaces 104 and 106 , and surfaces 104 and 106 engage the material of skirt 14 to form lugs 18 .
- surfaces 104 and 106 are shaped to form the shape of lug 18 discussed above.
- surface 104 of lug bushing 100 has a length L 2 , and in general L 2 matches L 1 of lug 18 .
- L 2 is between 0.5 inches and 1.5 inches, and in a specific embodiment, L 2 is about 0.75 inches.
- surface 106 forms an angle F, and in various embodiments, angle F matches angle A of threads 40 and D of the engagement surface 19 of the lugs 18 .
- the angled surface 106 is disposed about the lug tool 102 as a curved, outer surface of the lug tool 102 .
- This curved outer surface of the lug tool 102 defined by the angled surface 106 has a radius that matches the radius of the thread profile.
- the resulting thread engagement surface 19 of the lug 18 is formed with a radius that matches the radius of the thread profile. Because the thread engagement surface 19 extends radially along the lug 18 rather than being formed linearly, the contact area between the lugs 18 and the threads 40 is increased, resulting in a decreased amount of pressure being imparted on the neck 32 of the container 30 by the closure 10 .
- the relative dimensions, including angles, lengths and radii, as shown in the Figures are to scale. Actual measurements of the Figures will disclose relative dimensions, angles and proportions of the various exemplary embodiments. Various exemplary embodiments extend to various ranges around the absolute and relative dimensions, angles and proportions that may be determined from the Figures. Various exemplary embodiments include any combination of one or more relative dimensions or angles that may be determined from the Figures. Further, actual dimensions not expressly set out in this description can be determined by using the ratios of dimensions measured in the Figures in combination with the express dimensions set out in this description.
Abstract
Description
- This application is a continuation of U.S. Non-Provisional patent application Ser. No. 15/608,353, filed May 30, 2017, which is a continuation of U.S. Non-Provisional patent application Ser. No. 15/014,909, filed Feb. 3, 2016, now U.S. Pat. No. 9,694,946, which is a continuation of International Application No. PCT/US2015/024648, filed Apr. 7, 2015, which claims the benefit of and priority to U.S. Provisional Patent Application No. 61/978,524 filed Apr. 11, 2014, each of which are incorporated herein by reference in their entireties.
- The present invention relates generally to the field of closures. The present invention relates specifically to a metal closure with multiple thread engaging lugs.
- One embodiment of the invention relates to a metal closure having multiple thread engaging lugs, and in one embodiment the lug design is configured to decrease the pressure exerted by the closure lugs on the neck finish of the container.
- One embodiment of the invention relates to a metal closure having a top wall, a skirt and a plurality of lugs. The skirt extends downwards from a peripheral edge of the top wall. A first end of the skirt is attached to the top wall. A second end of the skirt is defined by a lower edge. The lower edge is radially defined between an exterior surface and an interior surface. The closure includes a plurality of radially inwardly extending lugs located at positions about the lower edge. The interior surface of the lower edge at the positions of the lugs extend radially inwards relative to the interior surface of the lower edge of the skirt adjacent the lugs; The plurality of lugs occupy at least 25% of the length of the perimeter of the lower edge.
- Another embodiment of the invention relates to a metal closure having a top wall, a sidewall, and a plurality of lugs. The top wall has a center point that lies along a central axis. The top wall is concentrically disposed about the central axis. The sidewall extends downward along its length from a peripheral edge of the top wall to a lower edge. The plurality of lugs, the top wall, and sidewall are formed from a single contiguous piece of metal. The lugs are deformed sections the sidewall that extend radially inwards towards the central axis. Adjacent lugs are separated from each other by undeformed portions of the sidewall. Adjacent lugs are separated from each other by undeformed portions of the sidewall. Each lug has a first end and a second end spaced from the first end in the circumferential direction. The angular distance between the first end and second end of each lug as measured from the central axis is at least 30°.
- Another embodiment of the invention relates to a metal closure having a top wall, a skirt, and a plurality of lugs. The skirt extends downward from a peripheral edge of the top wall. The skirt includes a lower edge. At least five lugs are formed at the lower edge of the skirt.
- This application will become more fully understood from the following detailed description, taken in conjunction with the accompanying figures, wherein like reference numerals refer to like elements in which:
-
FIG. 1 is a top perspective view of a closure according to an exemplary embodiment. -
FIG. 2 is a bottom perspective view of a closure according to an exemplary embodiment. -
FIG. 3 is a bottom plan view of a closure according to an exemplary embodiment. -
FIG. 4 is a container according to an exemplary embodiment. -
FIG. 5 is a diagram showing the threaded neck of the container ofFIG. 4 according to an exemplary embodiment. -
FIG. 6 is a sectional view taken along line 6-6 showing a top perspective view of the engagement surface of the lugs of the closure ofFIG. 1 according to an exemplary embodiment. -
FIG. 7 is a perspective view of a lug bushing according to an exemplary embodiment. -
FIG. 8 is a perspective view of a lug tool according to an exemplary embodiment. -
FIG. 9 is a detailed view of a portion of the lug bushing ofFIG. 7 according to an exemplary embodiment. -
FIG. 10 is a detailed view of a portion of the lug tool ofFIG. 8 according to an exemplary embodiment. - Referring generally to the figures, various embodiments of a metal closure configured to exert a decreased pressure on the neck of a container are shown and described. In general, the metal closure discussed herein includes a plurality of lugs (e.g., five or more lugs) that have an increased width such that the sealing force is more evenly distributed around the neck of the container, thereby decreasing the pressure exerted on the container neck by the closure. In some embodiments, the container sealed by the closure is formed from a plastic material such as polyethylene terephthalate. In some applications, the plastic material of the container may be softened (e.g., by heat from a hot-fill process, steam retort, pasteurization, etc.), and the lower pressure lug design discussed herein acts to decrease or prevent deformation of the plastic material of the container neck that may otherwise be caused by a closure with a different, higher pressure lug design.
- Referring to
FIG. 1 andFIG. 2 , ametal closure 10 is shown according to an exemplary embodiment. Closure 10 includes atop wall 12, and a sidewall orskirt 14 extending downward from a peripheral edge ofskirt 14.Skirt 14 has alower edge 16 that extends in a radial direction between aninner surface 13 and anouter surface 15. In the embodiment shown,closure 10 is formed from a single contiguous piece of metal. -
Closure 10 includes a plurality of engagement lugs, shown aslugs 18, formed atlower edge 16.Lugs 18 extend radially inward from thelower edge 16, and are formed by deforming a curled, rolled or crimped portion of thelower edge 16. In various embodiments,lugs 18 are also formed from sections of theskirt 14 that have been deformed to extend radially inwards towards the central axis of theclosure 10, withadjacent lugs 18 separated from each other by undeformed portions of theskirt 14. In such embodiments,lugs 18 are also formed from the same single contiguous piece of metal that forms the rest of theclosure 10. - As shown in
FIG. 2 , at those locations along thelower edge 16 about whichlugs 18 are formed, theinner surface 13 of thelower edge 16 extends radially inwards from theinner surface 13 of those portions of thelower edge 16 about which nolugs 18 are formed. Additionally, in various embodiments, at those locations along thelower edge 16 where thelugs 18 are formed, the width of thelower edge 16 in a radial direction is greater than the width of thelower edge 16 in a radial direction at locations at whichlugs 18 are not formed. - In one embodiment,
closure 10 includes more than fourlugs 18, and in onesuch embodiment closure 10 includes fivelugs 18.Closure 10 includes a plurality of non-lugged,curved sections 20 located between eachlug 18. The curvature of the non-lugged,curved sections 20 generally mirrors the curvature of the peripheral edge of thetop wall 12. In one embodiment,closure 10 includes more than four non-lugged,curved sections 20, and in one such embodiment,closure 10 includes five non-lugged,curved sections 20. As shown inFIG. 3 , in some embodiments, thelugs 18 are formed about thelower edge 16 of theskirt 14 such that none of thelugs 18 lie diametrically opposite each other. - Referring to
FIG. 3 , a bottom plan view ofclosure 10 is shown. As shown inFIG. 3 , lugs 18 are evenly spaced aroundlower edge 16. In various embodiments, angle C is defined between the midpoints ofadjacent lugs 18. Angle C is between 60 degrees and 80 degrees, and in a specific embodiment, the midpoint of eachlug 18 is spaced about 72 degrees (e.g., 72 degrees plus or minus 1 degree) from the midpoint of anadjacent lug 18. In one embodiment, eachlug 18 has a length generally in the circumferential direction shown as L1. In one embodiment, L1 is between 5 and 15 percent of the perimeter length oflower edge 16. In various embodiments, L1 is between 0.5 inches and 1.5 inches, and in a specific embodiment, L1 is about 0.75 inches. In one such embodiment, the diameter ofclosure 10 is 63 mm. - In various embodiments, each
lug 18 defines an angle B relative to the center point ofclosure 10. Angle B is defined between afirst lug end 25 and asecond lug end 26 spaced from thefirst lug end 25 in a circumferential direction. In various embodiments, the angular distance between thefirst lug end 25 and thesecond lug end 26, i.e. angle B, is between 30 degrees and 50 degrees, specifically is between 35 degrees and 45 degrees and more specifically between 38 degrees and 42 degrees. In one embodiment, angle B is at least 30 degrees. In one embodiment, eachlug 18 increases the contact area with theneck 32 of thecontainer 30 by approximately 72% as compared to a standard four lug metal closure. Thus, in various embodiments, the increased length L1 oflugs 18 and the increased number oflugs 18 as compared to a standard four lug closure act to better distribute sealing forces around theneck 32 of thecontainer 30 sealed byclosure 10, and in some embodiments, this decrease in force acts to limit distortion of thecontainer neck 32. - In various embodiments,
closure 10 is configured to seal a container such ascontainer 30 shown inFIG. 4 .Container 30 includes aneck 32 defining anopening 34.Threading 36 is formed on the outer surface ofneck 32. In various embodiments, both thecontainer 30 and the threading 36 are formed from a plastic material such as, but not limited to polyethylene terephthalate. An inner surface ofcontainer 30 defines acontents cavity 38 that may hold a variety of container contents including various food products. In general, lugs 18 ofclosure 10 engage threading 36 to attachclosure 10 toneck 32 ofcontainer 30. As shown inFIG. 3 ,closure 10 includes agasket material 22 that forms a hermetic seal with the upper rim ofneck 32 during sealing.Gasket material 22 is located on the underside oftop wall 12, surrounding the peripheral edge of the underside of thetop wall 12 from which theskirt 14 extends. In various embodiments, thegasket material 22 may also surround the inner corner formed at the juncture between the underside of thetop wall 12 and the interior surface of the downwardly extendingskirt 14.Gasket material 22 may be a deformable polymer material, such as a thermoplastic elastomer material, that forms a seal withcontainer neck 32 upon application ofclosure 10. - Referring to
FIG. 5 , a detailed view of threading 36 is shown according to an exemplary embodiment. As shown, threading 36 includes a plurality ofthreads 40 having anupper surface 48 and alower surface 49. Ingeneral container 30 includes onethread 40 for eachlug 18 ofclosure 10. Thus, in the embodiment shown,container 30 includes fivethreads 40.Threads 40 are shaped and positioned to allowclosure 10 to be threaded on and off ofneck 32 and also facilitate the lower pressure sealing provided byclosure 10.Threads 40 have a thread pitch angle or beta helix angle shown by angle A. In various embodiments, angle A is between 5 degrees and 7 degrees, specifically is about 6 degrees and more specifically is 6 degrees, 6 minutes. -
Threads 40 have afront portion 42 that overlaps therear portion 44 of theadjacent thread 40 atoverlap 46.Threads 40 are sized and arranged such thatoverlap portion 46 facilitates threading ofclosure 10 on tocontainer 30. -
FIG. 6 is a sectional view of theclosure 10 taken along line 6-6 ofFIG. 1 and shows a top perspective view of the upper surface of thelugs 18. As shown inFIG. 6 , eachlug 18 includes athread engagement surface 19 that extends along the upper surface of thelug 18. Thethread engagement surface 19 of eachlug 18 is formed having an angle D, as measured between thethread engagement surface 19 and a plane along which thelower edge 16 of theclosure 10 lies. In general the angle D of thethread engagement surface 19 of thelugs 18 matches the angle A of thethreads 40. When theclosure 10 is attached to thecontainer 30, thethread engagement surface 19 of the lugs interfaces with thelower surface 49 of thethreads 40 to seal thecontainer 30. - Referring to
FIGS. 7-10 , tooling configured to form lugs 18 is shown according to an exemplary embodiment.FIG. 7 shows lugbushing 100, andFIG. 8 showslug tool 102. In general,lug bushing 100 includes aninner engagement surface 104 for eachlug 18 to be formed, andlug tool 102 includes anouter engagement surface 106 for eachlug 18 to be formed. To form lugs 18, a portion ofskirt 14 is positioned betweensurfaces skirt 14 to form lugs 18. - As shown in
FIG. 9 andFIG. 10 ,surfaces lug 18 discussed above. As shownsurface 104 oflug bushing 100 has a length L2, and in general L2 matches L1 oflug 18. In various embodiments, L2 is between 0.5 inches and 1.5 inches, and in a specific embodiment, L2 is about 0.75 inches. As shown inFIG. 10 ,surface 106 forms an angle F, and in various embodiments, angle F matches angle A ofthreads 40 and D of theengagement surface 19 of thelugs 18. - Also, as shown in
FIG. 8 , theangled surface 106 is disposed about thelug tool 102 as a curved, outer surface of thelug tool 102. This curved outer surface of thelug tool 102 defined by theangled surface 106 has a radius that matches the radius of the thread profile. When lugs 18 are formed using thelug tool 102, the resultingthread engagement surface 19 of thelug 18 is formed with a radius that matches the radius of the thread profile. Because thethread engagement surface 19 extends radially along thelug 18 rather than being formed linearly, the contact area between thelugs 18 and thethreads 40 is increased, resulting in a decreased amount of pressure being imparted on theneck 32 of thecontainer 30 by theclosure 10. - It should be understood that the figures illustrate the exemplary embodiments in detail, and it should be understood that the present application is not limited to the details or methodology set forth in the description or illustrated in the figures. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.
- Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only. The construction and arrangements, shown in the various exemplary embodiments, are illustrative only. Although only a few embodiments have been described in detail in this disclosure, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. Some elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the present invention.
- While the current application recites particular combinations of features in the claims appended hereto, various embodiments of the invention relate to any combination of any of the features described herein whether or not such combination is currently claimed, and any such combination of features may be claimed in this or future applications. Any of the features, elements, or components of any of the exemplary embodiments discussed above may be used alone or in combination with any of the features, elements, or components of any of the other embodiments discussed above.
- In various exemplary embodiments, the relative dimensions, including angles, lengths and radii, as shown in the Figures are to scale. Actual measurements of the Figures will disclose relative dimensions, angles and proportions of the various exemplary embodiments. Various exemplary embodiments extend to various ranges around the absolute and relative dimensions, angles and proportions that may be determined from the Figures. Various exemplary embodiments include any combination of one or more relative dimensions or angles that may be determined from the Figures. Further, actual dimensions not expressly set out in this description can be determined by using the ratios of dimensions measured in the Figures in combination with the express dimensions set out in this description.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/507,966 US20190329939A1 (en) | 2014-04-11 | 2019-07-10 | Metal Closure with Low Pressure Engagement Lugs |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US201461978524P | 2014-04-11 | 2014-04-11 | |
PCT/US2015/024648 WO2015157236A1 (en) | 2014-04-11 | 2015-04-07 | Metal closure with low pressure engagement lugs |
US15/014,909 US9694946B2 (en) | 2014-04-11 | 2016-02-03 | Metal closure with low pressure engagement lugs |
US15/608,353 US10364070B2 (en) | 2014-04-11 | 2017-05-30 | Metal closure with low pressure engagement lugs |
US16/507,966 US20190329939A1 (en) | 2014-04-11 | 2019-07-10 | Metal Closure with Low Pressure Engagement Lugs |
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US15/608,353 Continuation US10364070B2 (en) | 2014-04-11 | 2017-05-30 | Metal closure with low pressure engagement lugs |
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US20190329939A1 true US20190329939A1 (en) | 2019-10-31 |
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US15/014,909 Active US9694946B2 (en) | 2014-04-11 | 2016-02-03 | Metal closure with low pressure engagement lugs |
US15/608,353 Active US10364070B2 (en) | 2014-04-11 | 2017-05-30 | Metal closure with low pressure engagement lugs |
US16/507,966 Abandoned US20190329939A1 (en) | 2014-04-11 | 2019-07-10 | Metal Closure with Low Pressure Engagement Lugs |
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US15/014,909 Active US9694946B2 (en) | 2014-04-11 | 2016-02-03 | Metal closure with low pressure engagement lugs |
US15/608,353 Active US10364070B2 (en) | 2014-04-11 | 2017-05-30 | Metal closure with low pressure engagement lugs |
Country Status (6)
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US (3) | US9694946B2 (en) |
EP (1) | EP3066017B1 (en) |
CA (1) | CA2933218C (en) |
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PL (1) | PL3066017T3 (en) |
WO (1) | WO2015157236A1 (en) |
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-
2015
- 2015-04-07 CA CA2933218A patent/CA2933218C/en active Active
- 2015-04-07 EP EP15776911.8A patent/EP3066017B1/en active Active
- 2015-04-07 ES ES15776911T patent/ES2905001T3/en active Active
- 2015-04-07 WO PCT/US2015/024648 patent/WO2015157236A1/en active Application Filing
- 2015-04-07 PL PL15776911T patent/PL3066017T3/en unknown
-
2016
- 2016-02-03 US US15/014,909 patent/US9694946B2/en active Active
-
2017
- 2017-05-30 US US15/608,353 patent/US10364070B2/en active Active
-
2019
- 2019-07-10 US US16/507,966 patent/US20190329939A1/en not_active Abandoned
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WO2015157236A1 (en) | 2015-10-15 |
EP3066017A4 (en) | 2017-05-31 |
US10364070B2 (en) | 2019-07-30 |
US9694946B2 (en) | 2017-07-04 |
EP3066017B1 (en) | 2021-11-24 |
PL3066017T3 (en) | 2022-01-17 |
EP3066017A1 (en) | 2016-09-14 |
CA2933218A1 (en) | 2015-10-15 |
US20170267414A1 (en) | 2017-09-21 |
CA2933218C (en) | 2023-04-04 |
US20160152384A1 (en) | 2016-06-02 |
ES2905001T3 (en) | 2022-04-06 |
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