Abstract: A container for carbonated beverages is disclosed. The container includes an interlocking plastic lid and plastic can construction wherein the lid snaps onto the can to provide a sealed container capable of withstanding high internal pressure without leakage.The can includes a neck portion having an inwardly extending ridge and an outwardly flared mouth thereabove. An outwardly and downwardly extending locking flange is unitarily formed at the top of the can mouth. The lid includes a concave top wall which fits into the can mouth and engages the ridge, and a peripheral rim which includes a downwardly opening groove to receive the locking flange. The lid is rigid, and is shaped to compress the locking flange as the lid is pressed onto the can, with the locking flange snapping outwardly over an annular shoulder to secure the lid in place.

Abstract: A two part closure for a container is comprised of a flexible foil sealing disk together with a flanged linerless screw threaded closure cap. The cap's sealing flanges contact the flexible foil sealing disk on opposite edges of the container's mouth rim and, as the cap is screwed down, these flanges bring the flexible foil sealing disk into continuous, intimate sealing contact with the container rim. Additionally, the inner closure flange draws the portion of the flexible foil sealing disk situated within the container mouth tight to eliminate creases and wrinkles in the foil sealing disk. Once the closure has been opened and the foil sealing disk removed, the container can be resealed by using the flanged linerless closure cap.

Abstract: A tamper-evident closure, having a lower band attached by connecting ribs to the lower edge of the skirt portion of a cap, is disclosed. The attaching ribs for the lower band extend radially inwardly, and are adapted to engage radially outwardly extending fins on a container adapted to receive the closure, so that rotation of the cap will fracture the connecting ribs to detach the tamper-evident ring from the cap.The lower band also incorporates along its bottom edge an inwardly extending shoulder which engages the lower edges of the container fins, when the cap is in place. The cap incorporates a thumb tab for lifting the cap off the container. When this is done, the lifting motion will fracture the connecting ribs to detach the tamper-evident ring from the cap. Thus, either rotational or lifting movement of the cap provides visible evidence that the cap has been moved.

Abstract: A plastic closure cap particularly suited for use in situations which require a tight seal such as with carbonated beverage containers is disclosed. A pair of sealing flanges extend downwardly and outwardly from an inner surface of the top of the closure cap. These sealing flanges have a horizontal seal interference distance which increases with increased cap size to maintain an effective sealing function. Seal flange back up abutment surfaces are contacted by the free ends of the seal flanges and limit the deflection of the flanges thus causing the seal flanges to wrap around the container mouth as the cap is secured to the bottle. A load stop ring is positioned between, and separated from the seal flanges on the inner surface of the closure cap and contacts the container neck when the closure is in place. The sealing flanges include vent slots which increase the safety and convenience of the closure cap.

Abstract: A tamper proof closure cap for a container, a tool for manufacturing the cap and a method for removing the cap from the tool are defined. The cap is designed with the tamper proof skirt as a unitary structure with the main body of the cap. The skirt has unique structural aspects which allow for less complexity in the tool and ease of removal of the cap from the tool. The tool includes a stripper ring which laterally support the skirt and permits a shift of the pivot plane for the skirt relative to the main body portion during removal of the cap from the mold.

Abstract: A tamper evident closure preferably for use on a screw threaded neck of a container is disclosed. The closure includes a tamper evident band which is quite thin and has a diameter which approximates that of the cap's sidewall. The tamper evident band is joined to the cap's sidewall by a plurality of bridge strips that are circumferentially aligned with ratchet teeth on the tamper evident band. During application of the cap to the container neck, the band deforms as the ratchet teeth cam over cooperatively shaped ratchet lugs on the bottle neck. However, during cap removal, the ratchet lugs stop the ratchet teeth and the tamper evident band from moving so that the band is separated from the cap thereby providing a clear indication of tampering with the closure.

Abstract: A tamper proof closure cap for a container, a tool for manufacturing the cap and a method for removing the cap from the tool are defined. The cap is designed with the tamper proof skirt as a unitary structure with the main body of the cap. The skirt has unique structural aspects which allow for less complexity in the tool and ease of removal of the cap from the tool. The tool includes a stripper ring which laterally support the skirt and permits a shift of the pivot plane for the skirt relative to the main body portion during removal of the cap from the mold.

Abstract: A closure cap for a container with enhanced sealing capability including a sealing member which is uniquely structurally arranged for optimum sealing without the need for excessive torque applications.

Abstract: A unitary cap of two dissimilar materials for sealing containers such as bottles or jars comprising a rigid outer closure member and a substantially resilient inner sealing member formed together as a unitary cap wherein the substantially rigid outer closure member includes a top wall and a depending annular side wall which extends over and is adapted to be secured to the neck of a container, serrations are provided on the exterior surface of the substantially rigid outer closure member for gripping purposes, and a reinforcement shoulder is located on the outer perimeter of the depending annular side wall adjacent the lower edge thereof to prevent excessive cap expansion upon application to a container and the substantially resilient inner closure member includes a base sealing element bonded or anchored to the substantially rigid closure member disposed to engage the inner and outer rim edges and/or top surface of the container to which the unitary cap is applied.