US20030098286A1 - Plastic closure, method of manufacture, and closure and container package for high-temperature applications - Google Patents
Plastic closure, method of manufacture, and closure and container package for high-temperature applications Download PDFInfo
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- US20030098286A1 US20030098286A1 US09/994,554 US99455401A US2003098286A1 US 20030098286 A1 US20030098286 A1 US 20030098286A1 US 99455401 A US99455401 A US 99455401A US 2003098286 A1 US2003098286 A1 US 2003098286A1
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- United States
- Prior art keywords
- closure
- disk
- liner
- set forth
- base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/78—Moulding material on one side only of the preformed part
- B29C70/80—Moulding sealing material into closure members
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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
- B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
- B65D41/045—Discs
Abstract
A plastic closure includes a plastic closure shell having a base wall, a peripheral skirt with an internal thread for securing the closure to a container finish, and an internal bead on the skirt adjacent to but spaced from the base wall. A plastic disk has a periphery loosely captured between the bead and the base wall of the closure shell. An annular ring extends axially from the base of the disk adjacent to but spaced from the periphery of the disk. A resilient liner is molded onto the disk over at least the central portion of the disk base and the disk ring. The ring urges the liner into sealing engagement with a radially inner edge of a container finish when the closure is secured to the container finish.
Description
- The present invention is directed to plastic closures for beverage, food, juice, pharmaceutical and like applications, and more particularly to a closure and method of manufacture that are particularly well suited for high-temperature (e.g., pasteurization, hot fill, asceptic fill and retort) applications.
- It has heretofore been proposed to provide a plastic closure for a container, which comprises a plastic cap or shell with an interior liner for sealing engagement with the sealing surface of the container finish. For example, U.S. Pat. No. 4,984,703 discloses a plastic closure that comprises a shell having a base wall with a peripheral skirt and a thread for securing the closure to a container finish, and a sealing liner compression molded in situ on the interior of the shell base wall. U.S. Pat. No. 5,451,360 discloses a method and apparatus for compression molding the liner in situ within the closure shell. It has also been proposed to provide plastic resin barrier materials within the sealing liner for resisting transmission of gases (e.g., carbon dioxide and oxygen), water vapor and/or flavorants through the liner. For example, EP 0926078A1 discloses a plastic closure and method of manufacture in which the liner is compression molded in situ on the interior surface of the closure base wall, and includes a multiplicity of alternating layers of matrix polymer such as EVA and barrier polymer such as EVOH. EP 0926215A1 discloses a plastic closure and method of manufacture in which the liner is compression molded in situ on the interior surface of the closure base wall, and includes a dispersion of barrier polymer platelets, such as EVOH, dispersed within matrix polymer such as EVA.
- Although the closures, the methods of manufacture, and the closure and container packages disclosed in the noted documents have addressed problems theretofore extent in the art, further improvements remain desirable. For example, it is desirable to provide a closure and liner construction, a method of closure manufacture, and a closure and container package that are particularly well adapted for high-temperature applications. Such high-temperature applications include, for example, applications in which the container is filled with product while the product is hot, such as so-called hot fill and asceptic fill applications. High-temperature applications also include applications in which the filled package is subjected to pasteurization or retort after filling. During retort applications, for example, the filled package may be subjected to a temperature of 265° F. for fifteen minutes. High-temperatures situations can also occur when a package is filled with a carbonated beverage and subjected to storage under high-temperature conditions, in which the internal pressure within the container can increase dramatically. In all of such high-temperature situations, the container closure is subjected to elevated internal pressure, which tends to distort or dome the closure base wall and lift the sealing liner away from sealing engagement with the container finish. It is an objective of the present invention to provide a closure, preferably a barrier closure, a method of closure manufacture, and a closure and container package that are particularly well suited for such high-temperature applications, and specifically in which the sealing liner of the closure remains in sealing engagement with the container finish during high-temperature situations.
- The present invention contemplates a number of different aspects or features, which may be implemented separately from or more preferably in combination with each other.
- A two-piece plastic closure in accordance with a first aspect of the present invention comprises a plastic closure shell that includes a base wall and a peripheral skirt with an internal thread or bead for securing the closure to a container finish. A plastic disk is loosely retained within the closure shell parallel to but separate from the base wall. A resilient sealing liner is molded in situ on the disk for sealing engagement with a container finish. The plastic disk preferably includes an annular ring underlying the liner on a side of the disk remote from the base wall. The ring is spaced from the closure skirt for urging the liner against the radially inner edge around the mouth of a container finish when the closure is secured to the container finish. Thus, even if the closure base wall is distorted or domed outwardly during a high-temperature situation, the annular ring maintains the liner in sealing engagement with the radially inner edge of the container finish.
- The disk in the preferred embodiments of this first aspect of the invention preferably includes a flat circular base from which the annular ring extends coaxially with the circular disk periphery. The ring preferably has an S-shaped radially outwardly facing surface, including a rounded convex portion that extends from an axial edge of the ring and a rounded concave portion that extends from the convex portion to a flat axially facing surface on the base of the disk. The liner is urged against the axially facing sealing surface of the container finish and against the radially inner edge of the container finish by this S-shaped ring surface. The base of the disk has a central portion within the ring and a peripheral portion outside of the ring. The liner is preferably of uniform thickness over the central portion of the disk, over the ring and over the peripheral portion of the disk. The disk preferably includes an axially extending bead around a peripheral portion of the disk base to space the disk base from the base wall of the liner. The closure preferably includes a bead extending radially inwardly from the closure skirt adjacent to but spaced from the base wall, and the periphery of the disk is preferably loosely captured between the skirt bead and the base wall.
- In some preferred embodiments in accordance with this first aspect of the invention, the disk further includes an annular rib around a radially outer edge of the disk base extending axially away from the base wall of the closure shell and underlying the liner for engaging the liner against a radially outer edge of the container finish. Thus, in this embodiment, even if the liner becomes separated from the container finish around the radially inner edge of the finish, sealing engagement is maintained between the liner and the container finish around the radially outer edge of the finish. The closure shell preferably has a bead extending radially inwardly from the skirt adjacent to but spaced from the base wall of the closure shell, and the annular rib on the disk preferably has a concave radially outwardly directed surface portion received over the skirt bead for holding the disk and liner in position within the closure.
- In accordance with a second aspect of the present invention, a plastic closure includes a plastic shell having a base wall and a peripheral skirt with an internal thread or bead for securement to a container finish. A resilient sealing liner is urged by the base wall into sealing engagement with the container finish upon securement of the closure to the finish. An annular ring underlies the liner and is spaced radially inwardly from the skirt for urging the liner into sealing engagement with a radially inner edge of the container finish mouth. The ring may be provided either on the base wall of the closure shell, or on a separate plastic disk loosely retained within the shell parallel to but spaced from the base wall of the shell.
- In accordance with yet another aspect of the present invention, a method of making a plastic closure includes providing a plastic closure shell having a base wall and a peripheral skirt with an internal thread or bead for securing the closure to a container finish. A plastic disk is placed within the closure shell against the base wall, and a resilient plastic liner is compression molded in situ onto the disk for sealing engagement with a container finish. In the preferred embodiments in accordance with this aspect of the invention, an internal bead is provided around the skirt of the closure shell adjacent to but spaced from the base wall, and the disk is placed within the shell such that a periphery of the disk is loosely captured between the bead and base wall of the closure shell. The liner is compression molded over the disk, including a central portion of the disk, and preferably includes barrier material to resist migration of gases, water vapor or flavorants through the liner and the closure shell. The barrier material may comprise, for example, EVOH, crystalline semi-crystalline and amorphous nylons, acrylonitrile copolymers, blends of EVOH and nylon, especially amorphous nylon, nanocomposites of clay, especially smectite clay, with EVOH and/or nylon, blends of EVOH and an ionomer, cyclic olefin copolymers, or blends thereof.
- A closure and container package in accordance with a further aspect of the present invention includes a plastic container having a body and a finish with an external thread, and a plastic closure that includes a shell with a base wall and a peripheral skirt with an internal thread securing the closure to the container finish. A plastic disk is retained within the closure shell between the base wall and an internal bead on the closure skirt. The disk includes a flat circular base with a peripheral portion captured between the bead and the closure base wall, and an annular ring extending axially from the base adjacent to but spaced from the periphery of the disk. A resilient liner is molded onto the disk underlying at least the central portion of the disk base and the ring that extends from the disk base. The ring urges the liner into sealing engagement with a radially inner edge of the container finish mouth when the closure is secured to the container finish. The liner is preferably molded in situ on the disk within the closure. The liner may include barrier materials to resist migration of gases (e.g., carbon dioxide or oxygen), water vapor and/or flavorants through the liner.
- The invention, together with additional objects, features and advantages thereof, will be best understood from the following description, the appended claims and the accompanying drawings in which:
- FIG. 1 is a partially sectioned elevational view of a closure and container package in accordance with one presently preferred embodiment of the invention;
- FIG. 2 is a fragmentary sectional view of the portion of the package within the
circle 2 in FIG. 1; - FIG. 3 is a fragmentary exploded perspective view of the container finish and closure in the embodiment of FIG. 1;
- FIG. 4 is a top plan view of the plastic disk in the closure of FIGS.1-3;
- FIG. 5 is a sectional view taken substantially along the line5-5 in FIG. 4;
- FIG. 6 is an enlarged fragmentary sectional view of the portion of the disk within the
circle 6 in FIG. 5; - FIG. 7 is a fragmentary partially sectioned elevational view of a closure and container package in accordance with a modified embodiment of the invention;
- FIG. 8 is a fragmentary sectional view on an enlarged scale of the portion of the package within the
circle 8 in FIG. 7; - FIG. 9 is a fragmentary exploded perspective view of the container finish and closure in the package of FIGS.7-8;
- FIG. 10 is a fragmentary sectional view similar to that of FIG. 6 but illustrating a portion of the closure disk in the package of FIGS.7-9;
- FIG. 11 is a fragmentary partially sectioned elevational view of a closure and container package in accordance with another embodiment of the invention;
- FIG. 12 is a fragmentary sectional view on an enlarged scale of the portion of the package within the
circle 12 in FIG. 11; - FIG. 13 is a fragmentary exploded perspective view of the container finish and closure in the package of FIGS.11-12;
- FIG. 14 is a fragmentary partially sectioned elevational view of the closure and container package in accordance with another embodiment of the invention;
- FIG. 15 is a fragmentary sectional view on an enlarged scale of the portion of FIG. 14 within the
circle 15; - FIG. 16 is an exploded perspective view of the closure and container finish in the package of FIGS. 14 and 15; and
- FIG. 17 is a fragmentary sectional view similar to that of FIG. 15 but illustrating another embodiment of the invention.
- FIGS.1-3 illustrate a closure and
container package 20 in accordance with one presently preferred embodiment of the invention as comprising acontainer 22 having abody 24 from which acylindrical finish 26 integrally extends. Aclosure 28 includes abase wall 30 and a cylindricalperipheral skirt 32 having one or moreinternal threads 34 received over one or moreexternal threads 36 oncontainer finish 26.Closure 28 preferably, but not necessarily, additionally includes a tamper—indicatingband 38 connected by frangible bridges or a frangible web to the lower edge ofskirt 32. (Directional words such as “lower” are employed by way of description and not limitation with respect to the upright orientation of the packages illustrated in the drawings, and directional words such as “axially” and “radially” are taken with respect to the axis of the container finish or closure skirt, as applicable. All dimensions are provided by way of example and not limitation.) Astop flange 40 extends from tamper-indicatingband 38 into engagement with abead 42 oncontainer finish 26 so that, whenclosure 28 is removed fromcontainer 22,band 38 is separated from the closure skirt by rupture of the frangible ribs or web. Other types of tamper indicating means may be employed. To the extent thus far described,closure 28 andpackage 20 are of generally conventional construction. The closure is preferably of molded plastic construction. The container may be of glass or plastic construction. - In accordance with one aspect of the present invention, a
liner disk subassembly 44 is loosely captured withinclosure 28 adjacent tobase wall 30.Liner disk subassembly 44 includes a plasticcircular disk 46 onto the undersurface of which a flexibleresilient sealing liner 48 is secured. In the embodiment of FIGS. 1-3,liner 48 does not extend to the peripheral edge ofdisk 46. Referring to FIGS. 4-6,disk 46 includes a generally flat circular base having acentral portion 50 and aperipheral edge 52. The disk base, includingcentral portion 50 andperipheral edge portion 52, is of generally uniform thickness in the axial direction, and peripheral edge of the disk extends at constant radius entirely around the axis of the disk. A circumferentially continuousannular ring 54 extends axially downwardly from the disk base coaxially with the disk base.Ring 54 is adjacent to but spaced radially inwardly from the peripheral edge ofdisk 46, effectively separatingcentral portion 50 fromperipheral portion 52. As best seen in FIG. 6,ring 54 has a generally S-shaped radially outwardly facing surface formed by aconvex portion 56 that extends from the rounded axial edge ofring 54, and aconcave portion 58 that extends fromconvex portion 56 to the flataxially facing surface 60 of diskperipheral portion 52. The radially inwardly facingsurface 62 ofring 54 is conical. Abead 64 extends axially upwardly fromperipheral portion 52 around the peripheral edge of the disk for engagement with the opposing undersurface of closure base wall 30 (FIG. 2) to position the body of the disk parallel to but spaced from the opposing surface of the closure base wall.Bead 64 may be circumferentially continuous or segmented. In one presently preferred but exemplary embodiment of the invention for a 40 mm retortable closure,disk 46 has a nominal outside diameter of 1.477 inches, andring 54 has a nominal radial thickness of 0.148 inch.Surfaces ring 54 wheresurface 56 blends intosurface 58 has a nominal angle of 120° with respect to the plane of the disk base.Surface 62 has a nominal angle of 27° with respect to the disk plane.Bead 64 has a nominal axial height of 0.003 inch.Disk base 50 has a nominal thickness of 0.036 inch, and the overall height of the disk base plusring 54 has a nominal dimension of 0.084 inch.Peripheral portion 52 has a nominal radial dimension of 0.081 inch. - Returning to FIGS.1-3, a
rounded bead 66 extends radially inwardly fromclosure skirt 32 adjacent to but spaced from the undersurface ofclosure base wall 30.Bead 66 may be circumferentially continuous or segmented. Theperipheral portion 52 ofdisk 46 is loosely captured betweenbead 66 andbase wall 30. (Liner disk subassembly 44 is loosely captured within the closure shell until the closure is secured to the container finish, at which point the liner disk is tightly clamped between the closure base wall and the container finish.)Liner 48 is preferably compression molded in situ ontodisk 46 while the disk is captured within the closure. That is,disk 46 is first placed within the closure shell and captured betweenbead 66 andbase wall 30, andliner 48 is then compression molded in situ onto the disk. Alternatively, but less preferably, the liner may be compression molded onto the disk, and the liner disk subassembly then assembled to the closure.Liner 48 may be of any suitable material construction. In accordance with the preferred embodiments of the invention,liner 48 is of resin construction, and most preferably includes a barrier material to resist permeation of gases, water vapor and flavorants through the liner. The liner is most preferably provided in accordance with the disclosure of one of the European publications noted above, the disclosures of which are incorporated herein by reference. Other suitable barrier liners or non-barrier liners may alternatively be provided. It will be noted in FIGS. 1 and 2 thatliner 48 extends over the entire undersurface ofdisk 46 that is exposed in assembly to the interior ofcontainer 22. The liner extends overring 54 and surfaces 56, 58, and ontoflat surface 60 for at least a distance sufficient to engage the axial end ofcontainer finish 26 whenclosure 28 is secured tocontainer 22.Ring 54 additionally urges the liner into sealing engagement with the radially inner edge of the container finish mouth, so that the liner normally is in sealing engagement with both the axial end and the radially inner edge of the container finish. In FIG. 2, thephantom line 48 a shows compression of the peripheral portion of the liner in sealing engagement with the container finish.Liner 48 is preferably of uniform thickness over the central portion ofdisk 46, overring 54 and ontosurface 60. By way of example,liner 48 may have a nominal thickness of 0.025 inch. In a tamper-indicating closure, the axial spacing betweenbead 66 andbase wall 30 preferably is such thatflange 40 ofband 38 abutsbead 42 onfinish 26, and fractures the frangible bridges or web, beforebead 66 liftsliner disk subassembly 44 out of sealing engagement with the container finish. In this way, the closure will indicate tampering before the seal is broken. - FIGS.8-10 illustrate a closure and
container package 70 in accordance with a modified embodiment of the invention. (In all embodiments, identical reference numerals are employed to indicate identical or functionally related elements.) Inpackage 70, theliner disk subassembly 72 comprises acircular disk 74 and a flexibleresilient liner 76 molded thereon.Disk 74 includes acentral base portion 50 and aperipheral portion 52, from which a circumferentially continuousannular rib 78 integrally extends.Rib 78 is disposed at the outer peripheral edge ofperipheral disk portion 52, and extends axially therefrom coaxially with the disk base. Theinner surface 80 ofrib 78 is conical, extending axially and radially outwardly fromflat surface 60 ofdisk 74. The radially outer surface ofrib 78 has a concave recess ordepression 82 that is received by snap fit in assembly overbead 66 onclosure skirt 32. In a presently preferred embodiment ofdisk 74 for a 40 mm retortable closure,rib 78 has a nominal axial dimension of 0.060 inch,surface 82 has a nominal radius of 0.035 inch, andbead 64 has a nominal axial dimension of 0.006 inch. All other dimensions are the same as those provided in connection withdisk 46 in FIGS. 4-6.Liner 76 is molded over the entire undersurface ofdisk 74, including inside surface 80 ofrib 78. As best seen in FIG. 8 with reference tophantom line 76 a that shows the initial uncompressed geometry of the liner, the liner has a uniform thickness along the central portion of the disk, alongring 54 and alongperipheral portion 52, but tapers in thickness axially alongsurface 80 ofrib 78.Surfaces disk 74urge liner 76 into sealing engagement with the radially inner edge, the axial end, and the radially outer edge of the container finish. Thus, even if pressure within the container is sufficient to distort or domeclosure base wall 30 anddisk 74 sufficiently for loss of sealing engagement at the radially inner edge of the container finish, sealing engagement is maintained along the radially outer edge of the container finish bydisk rib 78 and the portion of the liner underlying the disk rib. - FIGS.11-13 illustrate a closure and
container package 84 in accordance with another aspect of the invention. In this package, theclosure 86 does not include a liner disk subassembly captured within the closure. Instead, a flexibleresilient sealing liner 88 is molded in situ directly onto the inside face of theclosure base wall 90. Theclosure base wall 90 includes aring 92 formed integrally with the closure base wall concentrically with the closure skirt and over which theliner 88 is formed. As best seen in FIG. 12,ring 92 onclosure base wall 90 urgesliner 88 into sealing engagement with the radially inner edge ofcontainer finish 26, while the flataxially facing surface 94 urgesliner 88 into sealing engagement with the axial end of the container finish. Thus, package 84 functions in a manner similar to that of package 20 (FIGS. 1-3) discussed above, with the exception thatliner 88 is molded directly onto the base wall of the closure rather than being provided in a separate liner disk subassembly captured within the closure. - FIGS.14-16 illustrate a closure and
container package 96 that includescontainer 22 and aclosure 98.Closure 98 includes aninternal shoulder 100 at the juncture ofclosure base wall 90 andperipheral skirt 32.Shoulder 100 has a radially inwardly orientedsurface 102 that extends axially and radially outwardly from the adjacentflat surface 104 of the closure base wall coaxially with the closure skirt. A flexibleresilient liner 106 extends along the inner surfaces ofbase wall 30 andshoulder 100. Thus,shoulder 100 functions to urgeliner 106 against the radially outer edge ofclosure finish 26, while the liner is simultaneously urged against the axial end offinish 26 bybase wall surface 104, and against the axially inner edge of the container finish by thering 92 around the closure base wall. - FIG. 17 illustrates a closure and
container package 108, in which anannular wall 110 extends axially fromclosure base wall 90 at a position adjacent to and coaxial withclosure skirt 32, but spaced radially inwardly from the closure skirt.Annular wall 110 may be spaced fromskirt 32 entirely aroundannular wall 110, or may be coupled to the skirt by circumferentially spaced buttresses.Annular wall 110 has a radially inwardly directedconical surface 112. A flexibleresilient liner 114 is compression molded in situ along the inner face ofclosure base wall 30, includingring 92, and along the radiallyinner face 112 ofwall 110 for sealing engagement with the radially inner edge, the axial end and the radially outer edge ofcontainer finish 26 as previously described. - There have thus been described several embodiments of a plastic closure, a method of making such a closure, and a closure and container package, which fully satisfy all of the objects and aims previously set forth. All of the closures and packages possess superior sealing capability, particularly in high-temperature applications such as hot fill, asceptic fill, pasteurization and retort applications. The closures and packages also achieve superior barrier properties when barrier materials are included in the sealing liners of the closures. The invention has been described in conjunction with a number of aspects and embodiments, and a number of modifications and variations have been discussed. Other modifications and variations will readily suggest themselves to persons of ordinary skill in the art. The invention is intended to embrace all such modifications and variations as fall within the spirt and broad scope of the appended claims.
Claims (58)
1. A two-piece plastic closure that comprises:
a plastic closure shell including a base wall and a peripheral skirt with internal means for securing the closure over a container finish, and a plastic disk loosely retained within said shell parallel to but separate from said base wall, and a resilient sealing liner molded in situ on said disk for sealing engagement with a container finish.
2. The closure set forth in claim 1 wherein said disk includes an annular ring underlying said liner on a side of said disk remote from said base wall, said ring being spaced from said skirt for urging said liner against a radially inner edge of a container finish when said closure is secured to the container finish.
3. The closure set forth in claim 2 wherein said disk comprises a flat base form while said annular ring extends.
4. The closure set forth in claim 3 wherein said ring has an S-shaped radially outwardly facing surface, including a rounded convex portion that extends from an axial edge of said ring and a rounded concave portion that extends from said convex portion to a flat axially facing surface of said base.
5. The closure set forth in claim 4 wherein said disk base has a central portion within said ring and a peripheral portion outside of said ring, said central and peripheral portions being of identical thickness.
6. The closure set forth in claim 5 wherein said liner is of uniform thickness over said central portion, said ring and said peripheral portion of said disk.
7. The closure set forth in claim 6 wherein said liner includes a barrier resin material to resist migration of gases, water vapor or flavorants through said liner.
8. The closure set forth in claim 5 wherein said disk further includes an axially extending bead around a peripheral portion of said disk base to space said disk base from said base wall of said shell.
9. The closure set forth in claim 3 wherein said disk further includes an annular rib around a radially outer edge of said disk base extending away from said base wall and underlying said liner for engaging said liner against a radially outer edge of a container finish when said closure is secured to the container finish.
10. The closure set forth in claim 9 wherein said annular rib has a radially inwardly directed surface, onto which a peripheral portion of said liner is molded, that extends axially and radially outwardly from said base of said disk.
11. The closure set forth in claim 10 wherein thickness of said liner on said radially inwardly directed surface of said rib is less than the thickness of said liner on said disk base and said ring.
12. The closure set forth in claim 10 wherein said closure shell has a bead extending radially inwardly from said skirt adjacent to but spaced from said base wall, and wherein said annular rib has a concave radially outwardly directed surface portion received over said bead.
13. The closure set forth in claim 1 wherein said closure shell includes a bead extending radially inwardly from said skirt at a position spaced from said base wall, and wherein said disk and liner are loosely captured between said bead and said base wall.
14. The closure set forth in claim 13 wherein said closure shell further includes a tamper-indicating band connected by frangible means to a lower edge of said skirt for abutment with a stop on the container finish, spacing between said bead and said base wall being such that said band abuts the stop and fractures said frangible means before said bead lifts said disk and liner from sealing engagement with the container finish.
15. The closure set forth in claim 1 wherein said liner includes a barrier material against migration of gases, water vapor or flavorants through said liner.
16. A plastic closure that comprises:
a plastic closure shell including a base wall, and a peripheral skirt with an internal thread for securing the closure to a container finish and an internal bead adjacent to but spaced from said base wall,
a plastic disk loosely retained by said bead parallel to but separate from said base wall, said disk including a flat base with a peripheral portion captured between said bead and said base wall and an annular ring extending axially from said base adjacent to but spaced from said periphery, and
a resilient liner molded onto said disk covering at least a central portion of said base and said ring, said ring urging said liner into sealing engagement with a radially inner edge of a container finish when said closure is secured to the container finish.
17. The closure set forth in claim 16 wherein said liner is molded in situ onto said disk within said closure.
18. The closure set forth in claim 17 wherein said ring has an S-shaped radially outwardly facing surface, including a rounded convex portion that extends from an axial edge of said ring and a rounded concave portion that extends from said convex portion to a flat axially facing surface of said base.
19. The closure set forth in claim 18 wherein said liner includes a barrier resin material to resist migration of gases, water vapor or flavorants through said liner.
20. The closure set forth in claim 16 wherein said disk further includes an axially extending bead around a peripheral portion of said disk base to space said disk base from said base wall of said shell.
21. The closure set forth in claim 16 wherein said disk further includes an annular rib around a radially outer edge of said disk base extending away from said base wall and underlying said liner for engaging said liner against a radially outer edge of a container finish when said closure is secured to the container finish.
22. The closure set forth in claim 21 wherein said annular rib has a radially inwardly directed surface, onto which a peripheral portion of said liner is molded, that extends axially and inwardly outwardly from said base of said disk.
23. The closure set forth in claim 22 wherein thickness of said liner on said radially inwardly directed surface of said rib is less than the thickness of said liner on said disk base and said ring.
24. The closure set forth in claim 22 wherein said closure shell has a bead extending radially inwardly from said skirt adjacent to but spaced from said base wall, and wherein said annular rib has a concave radially outwardly directed surface portion received over said bead.
25. A plastic closure that comprises:
a plastic shell including a base wall and a peripheral skirt with internal means for securement to a container finish,
a resilient sealing liner for urging by said base wall into sealing engagement with a container finish upon securement of said skirt to the finish, and
an annular ring underlying said liner and spaced radially inwardly from said skirt for urging said liner into sealing engagement with a radially inner edge of the container finish.
26. The closure set forth in claim 25 wherein said ring is on said base wall.
27. The closure set forth in claim 26 wherein said closure shell further includes a shoulder that extends radially inwardly from said skirt adjacent to said base wall, said liner extending along a radially inwardly directed surface of said shoulder for sealing engagement with an outer edge of a container finish when the closure is secured to the container finish.
28. The closure set forth in claim 27 wherein said radially inwardly directed surface is a conical surface that is angled radially outwardly from said base wall.
29. The closure set forth in claim 26 wherein said closure shell further includes an annular wall that extends axially from said base wall adjacent to said skirt, said liner extending along a radially inwardly directed surface of said annular wall for sealing engagement with an outer edge of a container finish when said closure is secured to the container finish.
30. The closure set forth in claim 29 wherein said radially inwardly directed surface is a conical surface that is angled radially outwardly from said base wall.
31. The closure set forth in claim 25 wherein said ring is on a plastic disk loosely retained within said shell parallel to but separate from said base wall.
32. The closure set forth in claim 31 wherein said disk comprises a flat base from which said annular ring extends.
33. The closure set forth in claim 32 wherein said disk further includes an axially extending bead around a peripheral portion of said disk base to space said disk base from said base wall of said liner.
34. The closure set forth in claim 32 wherein said disk further includes an annular rib around a radially outer edge of said disk base extending away from said base wall and underlying said liner for engaging said liner against a radially outer edge of the container finish when said closure is secured to the container finish.
35. The closure set forth in claim 34 wherein said annular rib has a radially inwardly directed surface, onto which a peripheral portion of said liner is molded, that extends axially and radially outwardly from said base of said disk.
36. The closure set forth in claim 35 wherein said closure shell has a bead extending radially inwardly from said skirt adjacent to but spaced from said base wall, and wherein said annular rib has a concave radially outwardly directed surface portion received over said bead.
37. The closure set forth in claim 25 wherein said liner includes a barrier resin material to resist migration of gases, water vapor or flavorants through said liner.
38. A closure and container package that comprises:
a container including a body and a finish with an external thread, and
a plastic closure that includes:
a plastic closure shell including a base wall, and a peripheral skirt with an internal thread securing the closure to a said container finish and an internal bead adjacent to but spaced from said base wall,
a plastic disk retained by said bead parallel to but separate from said base wall, said disk including a flat base with a peripheral portion captured between said bead and said base wall and an annular ring extending axially from said base adjacent to but spaced from said periphery, and
a resilient liner molded onto said disk covering at least a central portion of said base and said ring, said ring urging said liner into sealing engagement with a radially inner edge of said container finish.
39. The package set forth in claim 38 wherein said liner is molded in situ onto said disk within said closure.
40. The package set forth in claim 39 wherein said ring has an S-shaped radially outwardly facing surface, including a rounded convex portion that extends from an axial edge of said ring and a rounded concave portion that extends from said convex portion to a flat axially facing surface of said base.
41. The package set forth in claim 40 wherein said liner includes a barrier resin material to resist migration of gases, water vapor or flavorants through said liner.
42. The package set forth in claim 38 wherein said disk further includes an axially extending bead around a peripheral portion of said disk base to space said disk base from said base wall of said shell.
43. The package set forth in claim 38 wherein said disk further includes an annular rib around a radially outer edge of said disk base extending away from said base wall and underlying said liner for engaging said liner against a radially outer edge of said container finish.
44. The package set forth in claim 43 wherein said annular rib has a radially inwardly directed surface, onto which a peripheral portion of said liner is molded, that extends axially and radially outwardly from said base of said disk.
45. The package set forth in claim 44 wherein thickness of said liner on said radially inwardly directed surface of said rib is less than the thickness of said liner on said disk base and said ring.
46. The package set forth in claim 44 wherein said closure shell has a bead extending radially inwardly from said skirt adjacent to but spaced from said base wall, and wherein said annular rib has a concave radially outwardly directed surface portion received over said bead.
47. A method of making a two-piece plastic closure that comprises:
(a) providing a plastic closure shell that includes a base wall and a peripheral skirt with internal means for securing the closure to a container finish,
(b) placing a plastic disk within said closure shell against said base wall, and
(c) compression molding a resilient plastic liner in situ onto said disk for sealing engagement with a container finish.
48. The method set forth in claim 47 wherein said step (a) includes providing an internal bead around said skirt adjacent to but spaced from said base wall, and wherein said step (b) includes placing said disk within said shell such that a periphery of said disk is loosely captured between said bead and said base wall.
49. The method set forth in claim 48 wherein said disk has a central portion adjacent to said base wall.
50. The method set forth in claim 49 wherein said step (c) comprises compression molding a liner over said disk, including said central portion, which includes a barrier resin to said migration of gases, water vapor or flavorants through said liner.
51. The method set forth in claim 48 wherein said disk includes an annular ring underlying said liner on a side of said disk remote from said base wall, said ring being spaced from said skirt for urging said liner against a radially inner edge of a container finish when said closure is secured to the container finish.
52. The method set forth in claim 51 wherein said ring has an S-shaped radially outwardly facing surface, including a rounded convex portion that extends from an axial edge of said ring and a rounded concave portion that extends from said convex portion to a flat axially facing surface of said base.
53. The method set forth in claim 52 wherein said disk base has a central portion within said ring and a peripheral portion outside of said ring, said central and peripheral portions being of identical thickness.
54. The method set forth in claim 53 wherein said liner is of uniform thickness over said central portion, said ring and said peripheral portion of said disk.
55. The method set forth in claim 53 wherein said disk further includes an axially extending bead around a peripheral portion of said disk base to space said disk base from said base wall of said shell.
56. The method set forth in claim 51 wherein said disk further includes an annular rib around a radially outer edge of said disk base extending away from said base wall and underlying said liner for engaging said liner against a radially outer edge of the container finish when said closure is secured to the container finish.
57. The method set forth in claim 56 wherein said annular rib has a radially inwardly directed surface, onto which a peripheral portion of said liner is molded, that extends axially and radially outwardly from said base of said disk.
58. The method set forth in claim 57 wherein said closure shell has a bead extending radially inwardly from said skirt adjacent to but spaced from said base wall, and wherein said annular rib has a concave radially outwardly directed surface portion received over said bead.
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/994,554 US20030098286A1 (en) | 2001-11-27 | 2001-11-27 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
CA002412357A CA2412357C (en) | 2001-11-27 | 2002-11-22 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
MXPA02011665A MXPA02011665A (en) | 2001-11-27 | 2002-11-26 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications. |
CNB021281718A CN1294055C (en) | 2001-11-27 | 2002-11-26 | Plastic sealing cover for use at high temp and mfg. method thereof and assembly of sealing cover and container |
HU0204067A HU226940B1 (en) | 2001-11-27 | 2002-11-26 | Plastic closure, package and method of making plastic closure |
NZ522784A NZ522784A (en) | 2001-11-27 | 2002-11-26 | Plastic closure and container package for high- temperature applications and manufacturing process thereof |
TW091134371A TW200300400A (en) | 2001-11-27 | 2002-11-26 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
DE60214662T DE60214662T2 (en) | 2001-11-27 | 2002-11-27 | Plastic closure, with this equipped container, and manufacturing process |
SG200207199A SG112861A1 (en) | 2001-11-27 | 2002-11-27 | Plastic closure, method of manufacture, and closure and containier package for high-temperature applications |
AT02258167T ATE339367T1 (en) | 2001-11-27 | 2002-11-27 | PLASTIC CLOSURE, CONTAINER EQUIPPED WITH SAME, AND PRODUCTION METHOD |
ES02258167T ES2273975T3 (en) | 2001-11-27 | 2002-11-27 | PLASTIC CLOSURE, CONTAINER EQUIPPED WITH THIS, AND MANUFACTURING METHOD. |
JP2002382720A JP4165696B2 (en) | 2001-11-27 | 2002-11-27 | Plastic closure, manufacturing method, and closure and container package for high temperature applications |
EP02258167A EP1329393B1 (en) | 2001-11-27 | 2002-11-27 | Plastic closure, container equipped with it and method of manufacture |
AU2002306198A AU2002306198B2 (en) | 2001-11-27 | 2002-11-27 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
PL357404A PL205128B1 (en) | 2001-11-27 | 2002-11-27 | Plastic closure for a packaging container desogned to hold a product requiring special packaging and storage conditions, packaging container with its associated plastic closure for such products and method of making such plastic closure |
BRPI0204777-2A BR0204777B1 (en) | 2001-11-27 | 2002-11-27 | two piece plastic closure, container and closure packing and process of manufacturing a two piece plastic closure. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/994,554 US20030098286A1 (en) | 2001-11-27 | 2001-11-27 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
Publications (1)
Publication Number | Publication Date |
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US20030098286A1 true US20030098286A1 (en) | 2003-05-29 |
Family
ID=25540793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/994,554 Abandoned US20030098286A1 (en) | 2001-11-27 | 2001-11-27 | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
Country Status (16)
Country | Link |
---|---|
US (1) | US20030098286A1 (en) |
EP (1) | EP1329393B1 (en) |
JP (1) | JP4165696B2 (en) |
CN (1) | CN1294055C (en) |
AT (1) | ATE339367T1 (en) |
AU (1) | AU2002306198B2 (en) |
BR (1) | BR0204777B1 (en) |
CA (1) | CA2412357C (en) |
DE (1) | DE60214662T2 (en) |
ES (1) | ES2273975T3 (en) |
HU (1) | HU226940B1 (en) |
MX (1) | MXPA02011665A (en) |
NZ (1) | NZ522784A (en) |
PL (1) | PL205128B1 (en) |
SG (1) | SG112861A1 (en) |
TW (1) | TW200300400A (en) |
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Also Published As
Publication number | Publication date |
---|---|
CN1426930A (en) | 2003-07-02 |
HU226940B1 (en) | 2010-03-29 |
HUP0204067A2 (en) | 2003-07-28 |
NZ522784A (en) | 2003-11-28 |
HUP0204067A3 (en) | 2004-06-28 |
PL205128B1 (en) | 2010-03-31 |
HU0204067D0 (en) | 2003-01-28 |
JP4165696B2 (en) | 2008-10-15 |
CA2412357C (en) | 2008-12-30 |
TW200300400A (en) | 2003-06-01 |
ATE339367T1 (en) | 2006-10-15 |
JP2003200960A (en) | 2003-07-15 |
PL357404A1 (en) | 2003-06-02 |
MXPA02011665A (en) | 2004-09-03 |
SG112861A1 (en) | 2005-07-28 |
EP1329393A3 (en) | 2003-08-06 |
DE60214662T2 (en) | 2007-09-27 |
AU2002306198B2 (en) | 2009-04-02 |
EP1329393B1 (en) | 2006-09-13 |
EP1329393A2 (en) | 2003-07-23 |
CN1294055C (en) | 2007-01-10 |
DE60214662D1 (en) | 2006-10-26 |
BR0204777A (en) | 2004-06-15 |
CA2412357A1 (en) | 2003-05-27 |
ES2273975T3 (en) | 2007-05-16 |
BR0204777B1 (en) | 2011-01-25 |
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