Abstract: A packaging or wrapping for a food product, capable of resisting to high temperatures and of eliminating the overpressure generated by the water vapour inside the packaging due to temperature rise, without the same packaging having any aperture communicating its inside and the outside environment. The packaging is also adapted to restrain/reduce the emission of odor-generating substances that are generated during the heating or baking of the packaged food product, with respect to what occurs in the absence of a packaging, or with a packaging provided with apertures.

Abstract: Induction heat-seal liner that allows a visual inspection of the product in the container to be made through the seal, and/or an aroma from the product to be detected through the seal, while the seal remains secured to the container to protect against leakage or contamination. In one embodiment, the liner has an intermediate metal-foil layer having a central opening, and a central liner portion, aligned in a thickness direction with a central opening of a metal-foil layer, comprises one or more materials or spaces that provide visibility into and/or aroma penetration from the open mouth of the container. In another embodiment, a dual heat-seal liner having a dispensing aperture is provided that heat seal bonds to both the cap and container to form a non-removable closure assembly that protects the metal-foil layer from degradation by the product being dispensed.

Abstract: A composite element for the realization of protection devices of parts of the human body includes a matrix, a reinforcing element, at least partially embedded in the matrix, wherein the reinforcing element has at least one opening shaped so as to define an undercut between the matrix and the reinforcing element, such undercut being suitable for determining a mechanical constraint between the matrix and the reinforcement element.

Abstract: The present invention provides a seal comprising an elastomeric composite, said composite comprising an elastomeric polymer and a negative thermal expansion (NTE) filler, the NTE filler has a coefficient of thermal expansion (CTE) lower than ?6×10-6 K-1 within a temperature range of 220-293 K and is present in an amount of 0.01-50 volume % based on the total volume of the elastomeric composite at 20° C.

Abstract: A vessel closing laminate comprising: a seal laminate comprising a bottom subassembly of layers including a foil layer; and a seal substrate attached to the uppermost layer of the bottom subassembly of layers wherein the seal substrate has a bottom foam layer and a top plastic material layer and further includes a free tab lying wholly within the circumference of the seal; a wax layer on top of the plastic material layer of the seal substrate; and an absorbent liner adhered to the plastic material layer of the seal substrate by means of the wax layer.

Abstract: A holographic sealing member for a container including a heat actuated sealant or adhesive layer that secures the sealing member to a container. The sealing member also includes a metal foil sealing layer over and covering and bonded to the heat actuated sealant or adhesive layer, a holographic layer over and covering and bonded to the metal foil layer having an upper plastic layer and a lower embossed image layer, and a tab over and covering and bonded to the upper plastic layer. The tab may be pulled to remove the tab and the plastic layer from a container, thereby exposing the lower embossed image layer which may then be perforated to gain access to the contents of the container.

Abstract: A system and method for controlling oxygen ingress in cap closures is disclosed. According to one embodiment, an apparatus includes a cap and a cap liner. The cap liner includes a first diffusive layer and a semi-diffusive layer. A first side of the semi-diffusive layer is adjacent to the first diffusive layer, where the semi-diffusive layer has a lower oxygen transmission rate than that of the first diffusive layer. The cap liner further includes a second diffusive layer, where a first side of the second diffusive layer is adjacent to a second side of the semi-diffusive layer, and the semi-diffusive layer has a lower oxygen transmission rate than that of the second diffusive layer. The oxygen transmission rate of the cap liner is controlled by varying a thickness of the semi-diffusive layer.

Abstract: Sealing disc (1) for closing a container having a plug or cap closure, comprising a support (2) to be positioned at the bottom of the plug or of the cap, joined by means of a temporary adhesive (7) to a membrane seal (3) to be sealed on the mouth of the container, the membrane seal (3) being provided on all or part of its thickness with a prolongation constituting a pull tab (4), characterized in that the whole surface of the tab is folded back on the face of the membrane seal (3) in contact with the corresponding face of the support (2).

Abstract: The present invention relates to containers suitable for uses such as liquid hot-fill processes. More specifically the invention relates a containers having gas permeable vents with an integral sealing means that is externally activatable by non-mechanical means to effect hermetic sealing of the containers after filling.

Abstract: Heat-sealable seal including a support bonded to an inner seal by a temporary adhesive is provided. The inner seal has a pull-tab which is folded back once on the surface of the inner seal in contact with the corresponding surface of the support. The inner seal includes a laminate having a reinforcing layer and a sheet of a conducting material, to the lower surface of which is applied a heat-sealing film. The temporary adhesive is applied to the whole surface of the inner seal once the pull-tab is folded back. The seal is characterized in that the laminate has over its entire thickness a notch from which the pull-tab emerges, and a fold line formed by the pull-tab once the pull-tab is folded back, the fold line having a shorter length than the length of the notch. Methods of producing the seal are also disclosed.

Abstract: An aroma delivery system comprising aroma compound entrapped in a polymeric matrix.

Abstract: A seal for a container for comestibles, especially potable liquids, and in particular for use for sealing polyester containers such as bottles, which is suitable for passage through a PET recycling process, comprises a metal foil layer, a foam layer and a plastics film layer as well as a heat sealable layer below the foil. The foam is selected for its density and thickness so is to confer upon the seal a high buoyancy. The adhesion a between the foam and the foil is increased compared to currently available products, in order to prevent de-lamination between the foil and the foam during the recycling process.

Abstract: An induction seal disc for a closure (4) of a bottle for storing medicaments comprises an elastic pressure inlay (9) and an, in particular, metallic sealing foil (8). Between the pressure inlay (9) and the sealing foil (8) is disposed a film (10) having low permeability.

Abstract: Heat-sealable seal including a support bonded to an inner seal by a temporary adhesive is provided. The inner seal has a pull-tab which is folded back once on the surface of the inner seal in contact with the corresponding surface of the support. The inner seal includes a laminate having a reinforcing layer and a sheet of a conducting material, to the lower surface of which is applied a heat-sealing film. The temporary adhesive is applied to the whole surface of the inner seal once the pull-tab is folded back. The seal is characterized in that the laminate has over its entire thickness a notch from which the pull-tab emerges, and a fold line formed by the pull-tab once the pull-tab is folded back, the fold line having a shorter length than the length of the notch. Methods of producing the seal are also disclosed.

Abstract: A venting liner is connectable in fluid communication between a closure and an interior of a device for venting gas from the interior into the ambient atmosphere. The venting liner has an outer foam layer defining an inner surface and an outer surface, a plurality of fluid-flow apertures spaced relative to each other, extending between the inner and outer surfaces, and forming substantially vertical fluid-flow paths through the outer layer, and a plurality of relatively raised portions extending outwardly relative to the outer surface adjacent to respective fluid-flow apertures. A plurality of the relatively raised portions are engageable with the closure, define a substantially horizontal, tortuous fluid-flow path between the outer surface and the closure, and are in fluid communication with a plurality of fluid-flow apertures for venting gas flowing substantially vertically through the fluid-flow aperture(s) and, in turn, substantially horizontally between the outer surface and the closure.

Abstract: A cap for use with bottled water dispensing systems. The cap includes a main cap and a liner. The main cap has an opening which receives and seals against a probe. The liner is gripped between the main cap and the bottle neck and has a outside part and an inner movable part. The inner movable part is linked to the outer part by a large connecting section that serves as a hinge, and breakable or frangible connecting section. When the bottle is lowered onto the dispensing system, the probe enters into the opening in the main cap, breaks the frangible connection, and pushes the inner movable part open like a flap. The liner, at the location of the large connecting section, is resilient such that the inner movable part tends to close when the bottle is removed from the dispensing system.

Abstract: The present invention is a non-removable closure. A non-removable closure in accordance with the present invention may comprise (a) a first sealant layer; (b) a sealant interface layer; and (c) a second sealant layer. A non-refillable container for flowable materials in accordance with the present invention may comprise: (a) a cap; (b) a first sealant layer; (c) a sealant interface layer; (d) a second sealant layer; and (e) a flowable material receptacle. A method for manufacturing a non-removable bottle closure in accordance with the present invention may comprise the steps: (a) disposing a first sealant layer on a first surface of a sealant interface layer; (b) disposing a second sealant layer on a second surface of the sealant interface layer; (c) adhering the first sealant layer to a cap; and (d) adhering the second sealant layer to a receptacle mouth.

Abstract: A tamper evident container closure seal with an integral pull opener is constructed from one or more layers of frangible sheet material adhesively bonded to one or more layers of strengthening sheet material. The one or more strengthening layers each contain one or more duplicate void configurations that form a weak area in the multi layered seal only in the area of the void configuration. When a consumer forces a finger into the seal when bonded to the rim of a container the applied pressure forces the seal to break open and tear only in the weaker area of the void configuration while the peripheral portion of the seal remains bonded to the container rim. The broken open center portion of the seal then forms a pull tab that can be partially connected which allows the pull tab to be lifted back out and pulled from the container.

Abstract: A stopper cap and method for its manufacture, the stopper cap including a shell with a head, a skirt and a seal, in which the seal is a form seal, and the form seal has a resilient layer and a set of adjacent layers. The adjacent layers include a barrier layer, a malleable support layer to provide the adjacent layers a global malleable property such that the seal can be shaped without creation of folds, and an outer layer having an outer surface which can be compressed by the axial compression resulting from stoppering so as to match the form of the mouth of the neck.

Abstract: An container sealing material suitable for sealing a container comprises a liner sheet (liner), a sealant sheet, and an interlayer portion (interlayer) bound between the liner and the sealant sheet by individual layers of wax. The material has a closure-contacting surface and a heat-sealable surface. At least one of the surfaces of the liner and the interlayer that contacts a layer of wax is capable of absorbing liquid wax when the layer of wax is melted. At least one of the surfaces of the sealant sheet and interlayer which contacts a layer of wax is capable of absorbing liquid wax when the layer of wax is melted. The liner and the sealant sheet each release from the interlayer when sufficient heat is applied to the container sealing material to melt the layers of wax. The interlayer can include printed matter visible on one or both of its surfaces (e.g., a logo, proof-of-purchase indicator, and the like). The printed matter can include promotional indica for a product, a service, a game and the like.

Abstract: Disclosed are self-authenticating seals for containers in which the seals include a non-visible taggant correlated to a pre-determined indicia. Containers sealed with the sealing members as well as methods of authenticating containers that have been sealed with the sealing members are disclosed.

Abstract: Provided is container and container closure with a liner material that includes a substrate layer, an active material absorbed into or overlying the substrate layer, and a first protective layer overlying the active material on the top surface of said substrate layer. Optionally, a second protective layer underlies the bottom surface of the substrate layer. The protective layers are impermeable to the active material and are water-soluble. The protective layer precludes release of the active material from the substrate layer so long as the protective layers are intact and undissolved.

Abstract: Provided is a liner-provided cap for sealing the mouthpiece of a threaded container, which includes the cap shell 4 consisting of the top plate 2 and the tubular peripheral wall section 3 that hangs from the peripheral edge of the top plate 2, and the synthetic resin liner 5 provided on the inner surface of the top plate 2. The liner 5 includes the disk-shaped rigid sheet 5a disposed in contact with the inner surface of the top plate 2, and the soft layer 5b that is laminated to the rigid sheet 5a and is more flexible than the rigid sheet 5a. The soft layer 5b is concentric with the rigid sheet 5a and is formed in an annular or disk shape with a diameter smaller than that of the rigid sheet 5a so that the soft layer 5b can be brought into contact with at least the mouthpiece.

Abstract: An improved two-piece container seal suitable for sealing a container having a removable closure and for lining the closure comprises a flexible sealant sheet and a flexible liner sheet bonded thereto. The sealant sheet and liner sheet are of the same size and shape. The sealant sheet has a sealing surface and a first thermoplastic surface, and the liner sheet has an outer surface and a second thermoplastic surface. The first and second thermoplastic surfaces are in opposed, congruent contact with each other, and the first thermoplastic surface is ultrasonically welded to the second thermoplastic surface by an array of spaced, frangible ultrasonic welds, forming an adhesive-free interface therebetween. A method of manufacturing a two-piece container seal and a sealed container comprising a two-piece container seal are also described.

Abstract: This manufacturing process of a composite part (B), including a stamped body (11, 12) and an injected polymer material part (14), includes steps consisting of: a) placing a blank (1) of a body (11, 12) between a support (456) and a mold (31, 32), such that the said hollow part forms a pattern cavity (33) communicating with an opening (13) going through the blank (1); b) stamping the blank (1) using a punch (8); c) placing the holder (456) in a position in which it defines with the blank (1) at least one cavity (400) and in which there is at least one injection runner (50-60) leading to the said cavity (400). d) injecting the polymer material through the injection runner (50-60), said cavity (400) and said opening (13), so as to fill the said pattern cavity (33); and e) removing the composite part (B) from the mold.

Abstract: The present invention relates to a crown closure with 27 grooves that is opened or removed by applying a rotating force or a removal twist with a torque of from about 2 in lb to 9 in lb. The crown closure has a smaller contact surface between the grooves and the lip of the container that reduces friction and requires less force to open and therefore advantageously diminishes any potential harm the hands of those opening the closure.

Abstract: The present development is for a closure which provides a liner for abutting a surface and maintaining an effective pressure against a peelable seal affixed to a container lip as the sealed container is exposed to relatively high temperature and pressure conditions. The liner which abuts a surface of the seal sandwiches the seal between the liner and the container lip. The liner defines a resting thickness at ambient temperature and pressure conditions and is made from a material capable of being compressed to a thickness less than the resting thickness and of recovering to a recovery thickness sufficient to allow the liner to maintain a positive pressure against the seal upon exposure to elevated temperatures, elevated pressure, or a combination of elevated temperature and elevated pressure.

Abstract: A beverage container comprising a container body (3) including an opening and a plurality of recesses (80) in an exterior surface thereof, a cap (5) for closing the opening, and a collar (73) having a plurality of flaps (13) engagement with the recesses (80) to mount the collar (73) on the container body (3), the cap (5) and the collar (73) being connected to each other by a screw thread such that when secured together the collar (73) and hence the cap (5) is secured to the container body (3).

Abstract: The invention relates to a lid (1) and a method of opening the lid which is used for closing a container (15) having means on the inner side of screwing on to the neck (2) of a container. Internally, the lid has an inner lid (5) which is secured in the lid (1) by at least one securing means. The object of the invention is to provide a lid which is easy to open without using a great force or by using a tool, and which may simultaneously be disposed of without significant environmental impact. This is achieved by a lid (1) whose collar (3) has at least one projection (13) which points radially toward the centre and which extends from the inner side of the collar (3), wherein, during unscrewing of the lid (1), the projection (13) presses the edge of the inner lid (5) at least at one point out of contact with the upper edge of the package neck. This ensures venting of the volume of the container with a relatively weak torque.

Abstract: A cap for use with bottled water dispensing systems. The cap includes a main cap and a liner. The main cap has an opening which receives and seals against a probe. The liner is gripped between the main cap and the bottle neck and has a outside part and an inner movable part. The inner movable part is separated from the outer part by perforations and is connected to the outer part by a large connecting section, which serves as a hinge, and small connecting sections, which serve as frangible ties. When the bottle is lowered onto the dispensing system, the probe enters into the opening in the main cap, breaks the frangible ties, and pushes the inner movable part open like a flap. The liner, at the location of the large connecting section, is resilient such that the inner movable part tends to close when the bottle is removed from the dispensing system.

Abstract: Disclosed is a container cap having, as a sealing gasket, a layer of a resin composition as adhered to the surface of the cap body of polypropylene, wherein said resin composition comprises (A) from 25 to 70% by weight of an ethylene-vinyl alcohol copolymer having an ethylene content of from 20 to 60 mol % and a degree of saponification of at least 96% and (B) from 30 to 75% by weight of a polyolefin having a propylene or 1-butene content of at least 50 mol %. The container cap has excellent gas-barrier properties and sealability for containers, and is suitable for packaging containers for foods, medicines, agricultural chemicals, etc.

Abstract: An all-metal beverage can with a pour spout is disclosed. The can includes a can body for containing a beverage and a closure member. The closure contains a metal pour spout and a cap covering the pour spout. The pour spout and cap are in a recessed condition within the can body prior to opening the can, allowing the can to be shipped and stacked in the normal fashion. The closure further comprises a first layer forming the pour spout, a second layer forming the cap, and a scored area formed in the second layer. The cap separates from the closure by the user grasping the cap and breaking of the scored area (e.g., by twisting) and then removing the cap from the pour spout. When the container is opened, the pour spout is extendable from the can body to facilitate pouring of the beverage. In one possible embodiment, the pour spout is threaded. The cap threads onto the pour spout, enabling a resealing of the can.

Abstract: A drinking container comprises a bottle and a permanently leak-proof closure. The bottle is formed with contours that facilitate grasping by a user and has an opening sized to facilitate placing ice cubes into the bottle. Graduations on the sidewall of the bottle provide an indication of the volume of fluid within the bottle. The closure has threads configured to engage corresponding threads on the bottle and has a seal ring for sealing the liquid contents within the bottle. The closure further includes a lobe having an aperture.

Abstract: A seal for a container opening includes a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is bonded to the seal layer. The pull-tab forming layer has a heat resistant surface joined to the seal layer, and a hinge disposed near the center of the seal. A portion of the pull-tab forming layer defines a pair of opposed pull-tabs extending from the hinge, in which the heat resistant surface covers a top surface of each of the pull-tabs, a surface of the pull-tabs opposite the top surface, and a portion of the pull-tab forming layer facing the surface of the pull-tabs opposite the top surface. A method of forming the seal and a material blank for forming a plurality of the seals are also described.

Abstract: A venting cap liner used in a pressurized container closure arrangement. The cap liner includes a multi-layer sandwich structure having a first layer and a generally flat resilient intermediate layer. The layers include at least one perforation extending through the layers to enable gas flow therethrough. The first layer has a first surface including at least one channel extending from one edge of the first layer to another edge of the first layer. The intermediate layer is responsive to a gas pressure level in the container such that, at a first selected pressure level, the perforation extending through said second layer opens to allow gas to flow through the perforation and at a second selected pressure level, the intermediate layer expands to close the perforation thereby resisting gas flow.

Abstract: A sealing disc and a film composite for a container closure is provided, for use on a container with an opening bounded by a peripheral edge. The film composite includes a plurality of layers. An adhesive layer is arranged at least over a joining surface between the upper layer and the underlying layer.

Abstract: A sealing member for a cap featuring excellent cap performance as well as excellent safety and environmental friendliness, and a metallic cap. A foamed polyurethane elastomer having a JIS A hardness of from 15 to 65 and a foaming magnification of from 1.1 to 10 times is used as the sealing member so as to obtain excellent sealing performance, durability, safety and environmental friendliness. The sealing member is provided for a metallic cap shell that has a polyester film formed on the inner surface of the cap, thereby to obtain a cap featuring excellent sealing performance, durability, safety and environmental friendliness.

Abstract: A method for at least locally providing an article coated with an organic coating with a layer of readily deformable sealing material (so-called compound), which involves a layer of an intermediate of the compound being applied to the coating layer, after which the article is temporarily kept at an elevated temperature in order to form the compound from its intermediate, wherein the coating layer of the article comprises a polyethylene terephthalate and the compound is chosen from the group consisting of urethanes, amides, mixtures thereof and heteropolymers thereof, and in that the free surface of the coating layer prior to the application of the intermediate of the compound, at least at the location where this intermediate is applied, is briefly subjected to a processing operation from the group of equivalent processing operations comprising a flame treatment in the course of which the coating layer does not melt.

Abstract: A container and closure assembly whereby a pull tab sufficiently narrow in width is secured to the interior of the closure, thereby preventing the closure from becoming loosened or displaced, yet when sufficient torque is applied by the consumer to open the closure and remove it from the container the narrow pull tab is disengaged from its seal to the interior of the closure, yet having the liner over the mouth of the closure remains intact and undamaged, thus preventing any contamination of the container content.

Abstract: The present invention provides a container closure, including: a metal closure shell having a top surface and a bottom surface, the top and bottom surfaces having at least one varnish coating thereon; a detachable sealing liner in contact with a portion of the bottom surface; and a print layer containing a polyester ink and interposed between the bottom surface and the liner; wherein the liner includes a PVC resin, wherein the print layer is in direct contact with the liner and the varnish coating on the bottom surface. Other embodiments include methods for making and using the closure.

Abstract: The invention concerns a method which consists in moulding a plastic cap (1) and steps which consist in: providing, proximate to an inner surface of base web (7) of the cap (1), a first layer (6) of material impermeable to a predetermined gas or gases and depositing, on said first layer (6) set in the cap (1), a second layer (8) made of an elastic material different from that of the first layer (6), said second layer (8) being designed to form the joint, by isolating the first layer from ambient air.

Abstract: A method for creating a seal gasket in the closure cap of a container starting from a cap formed separately, characterised by comprising the following operations: inserting into a cap (1, 10, 100) a first portion (3, 30, 300) of material in the plastic state having barrier properties against O2, CO2, or other gases; inserting a first die (4, 40, 400) to subject said first portion of material to compression in order to form on the base of the cap a first layer (5, 50, 500) of material having barrier properties against said gases; inserting into the cap onto said first layer a second portion (6, 60, 600) of material in the plastic state having hydraulic sealing properties; and inserting a second die (7, 70, 700) to subject said second portion of material to compression in order to form on said first layer a second layer (8, 80, 800) with hydraulic sealing properties.

Abstract: The present development is for a closure which provides a means for maintaining an effective pressure against a peelable seal affixed to a container lip as the sealed container is exposed to relatively high temperature and pressure conditions. The closure includes a liner which abuts a surface of the seal so as to sandwich the seal between the liner and the container lip. The resilient liner and inner foil seal are positioned above a retaining structure and function such that the peelable seal will not rotate relative to a container rim upon engaging the container rim as the closure is rotationally applied. This functions to inhibit torque transmission from the closure to the inner seal or reseal structure and further inhibits imperfections in the container rim from scraping or otherwise damaging the inner seal.

Abstract: A plastic closure that includes a cap having a base with a peripheral skirt defining a cap interior and threads on the skirt for securing the closure to a container. A liner is secured to the interior of the cap, preferably by compression molding in situ. The liner preferably consists essentially of a blend of matrix polymer material, particulate barrier polymer material and compatibilizer material. The heat and pressure of compression forms the particles of barrier polymer material into platelets that are oriented essentially parallel to the plane of the closure base.

Abstract: A plastic closure that comprises a cap having a base with a peripheral skirt defining the cap interior and threads on the skirt for securing the closure to a container. A liner is secured to the interior of the cap, preferably by being compression molded in situ on the base. The liner consists essentially of a multiplicity of alternating layers of a matrix polymer material such as EVA and a barrier material such as EVOH to resist transmission of gas, water vapor and/or flavorants through the liner. The matrix polymer material preferably is preblended with a compatibilizer material such as a maleic anhydride grafted polymer that ties the matrix polymer material to the barrier material.

Abstract: The present invention relates to a plastic barrier closure (or cap) for bottles and the like that has (1) a body having a top wall, a side wall, a securing means and a seal that has at least one concentric sealing member extending from the top wall, and (2) a barrier incorporated into the top wall. The barrier layer may be incorporated into the top wall by (1) depositing a melted mass of barrier polymer in the pre-molded cap body and then molding it into place by mechanical means or (2) forming a barrier layer from the barrier polymer and inserting it into a pre-molded cap body.

Abstract: A one-component seal and wadding system (1) for a screw-cap includes a seal (3) having lower layers (4,5) forming an induction heating sealable system for attaching the seal (3) to the neck of a container, a seal substrate (6) including a free tab (50) lying wholly within the circumference of the seal, a layer of liner (2), and attachment means (10,11,12) including a release layer (11) for attaching the seal substrate (7) including the tab (50) to the wadding (2).

Abstract: A closure cap adapted to be removably retained on a container can include a cap portion and a film portion. The cap portion can include an opening adapted to permit flow from an interior of the container to an exterior of the container when the closure cap is retained on the container. The film portion can be adapted to prohibit flow through the opening and can be positionable to permit flow through at least a portion of the opening when the closure cap is retained on the container. A drinking straw can be introduced into the opening to permit flow from the interior to the exterior of the closure cap.

Abstract: The present development is for a closure which provides a means for maintaining an effective pressure against a peelable seal affixed to a container lip as the sealed container is exposed to relatively high temperature and pressure conditions. The closure includes a liner which abuts a surface of the seal so as to sandwich the seal between the liner and the container lip. The liner defines a resting thickness at ambient temperature and pressure conditions and is made from a material capable of being compressed to a thickness less than the resting thickness and of recovering to a recovery thickness sufficient to allow the liner to maintain a positive pressure against the seal upon exposure to elevated temperatures, elevated pressure, or a combination of elevated temperature and elevated pressure.

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.