Abstract: A method for emplacing a seal on a closure for a container which comprises despositing a foamed adhesive in liquid form on an interior surface of the closure and allowing that foamed adhesive to solidify and adhere as a solid cellular foam to the interior surface of the closure.

Abstract: An internally rotation-symmetrical closure cap for closing a container, comprising a closed end wall and a side wall, said end wall being internally provided with an integral annular channel provided with a sealing ring in co-operation with the upper rim of the container by means of which the container is sealed. The channel comprises side walls which have the shape of two facing undercuts, while the sealing ring is a ring formed in situ by gelation.

Abstract: A tamper-proof closure for a container including an endwall and an annular, threaded sidewall. The sidewall includes an internal projection for mating with a part of the container to prevent turning of the closure when the closure is mounted on said container. A tear tab is provided on the sidewall radially outwardly of the projection. The sidewall includes tear facilitating portions on circumferentially opposite sides of the tear tab to enhance tearing of the sidewall on opposite sides of the tear tab to permit the tear tab and the projection to be swung outwardly to a removed position in which the closure can be turned. Another aspect of the invention includes a method of making the closure.

Abstract: This invention is directed to a liner for venting excessive internal pressure of an associated container, the liner including at least two plies of plastic material in which a first ply is formed of impermeable plastic and a second ply is deformable when subjected to a compressive force, the second ply including a plurality of indentations, the material in the areas of the indentations of the second ply are compressively deformed whereas second areas of the second ply are generally uncompressed or less compressed whereby when the liner is associated with a container and closure venting is permitted either through vents formed between a sealing lip of the container and the first or second areas depending upon the axial load of the closure relative to the container as determined by the torque involved in applying the closure to the container.

Abstract: A synthetic cork-like material for use as a closure for liquid containers which is composed of a fine celled polyolefin foam containing an ionomer and which may be formed by a foaming process.

Abstract: An improved vapor-seal, child-resistant closure and container combination is disclosed herein. The container comprises a cylindrical plastic body which is molded in one piece and has circumferentially spaced, radially extending projections on the upper end thereof that have notches therein. The closure comprises a one-piece plastic body having a top panel and an annular depending skirt with circumferentially spaced lugs extending radially inwardly for engagement with the notches. An annular integral rim or abutment is provided on the annular surface of the top panel of the closure and depends downwardly therefrom. A unique two-piece, vapor-seal liner is interposed between the annular abutment and the lugs for engagement with the upper end of the container.

Abstract: Cap liner construction in the form of a sandwich and so arranged that a compressible intermediate layer of relatively great thickness is disposed between two relatively thin non-resilient layers. The cap liner is sealed to the cap. The intermediate layer can be squeezed beyond the periphery of the material for making a better seal. Another embodiment discloses a two layer liner bonded to the cap.

Abstract: A method for producing a foamed plastic product suitable as liner material for container closures, including the steps of extruding a polymer composition foamable at atmospheric pressure into an air space at atmospheric pressure and then into a liquid quenching agent for stopping foaming and for setting, wiping against the quenched composition, and maintaining the residence time of the composition in the air space as a function of bubbling from the composition during the wiping.Also a container closure having a gas impermeable shell and a polyvinyl chloride foam liner of a density of 0.67 to 0.72 grams per cubic centimeter in the shell.

Abstract: A one-piece reusable closure for home canning. The closure is adapted for sealing home canning containers, such as "Mason Jars." The closure has a one-piece threaded cap with a bonded annular closed-cell foam gasket at the periphery of the central cover panel positioned to seal against the jar lip. A central cover portion is dished outwardly and moves to an inwardly dished configuration when vacuum is developed in the container. When the closure is unscrewed, the central panel portion springs with an audible click to the outwardly dished configuration. Limiting projections extending downwardly into the gasket bear and compress the gasket material against the lip of the jar to control tightening of the closure on the jar so that, when the jar contents are heated, gases will be vented under the circumferentially spaced portions of the gasket.

Abstract: For the capping of champagne bottles long skirt caps of frustoconical shape are used. These caps of thin metal foils are very fragile and bulky. Generally they are stacked one in another for shipping. To avoid any risk of the stacked caps being wedged into each other, their bottom is filled with a foamed thermoplastic washer. It is either detachable or injected cold.