Importance

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Abstract

The closure of the present invention provides a seal a variety of neck configurations, including substantially new and different neck profiles. The top of the cap, which may or may not include a valve, has side wall depending from the top of the cap and a skirt extending further downwardly from the side wall. The inside surface of the cap has an elongated sealing flange extending downwardly and outwardly from the underside of the top of the cap. The lower tip of the sealing flange is preferably disposed outside, in the radial direction, of the inside diameter of the latch bead formed at the base of the side wall of the cap. The length of the sealing flange, its position on the underside of the cap and the length-to-basewidth ratio of the flange keep it from becoming misaligned or twisted. The inside surface of the wedge-shaped sealing flange is preferably disposed at an obtuse angle from the plane of the top of the cap. The side wall of the cap may include a concave section or seat immediately above the latch bead and a stop above the concave section which has a slightly convex configuration. The seat and stop provide a way of locating the outside surface of the neck finish relative to the sealing flange to ensure that a consistent pressure is applied at the interface between the sealing flange and the upwardly facing surface of the neck finish. The extended-length sealing flange of the cap of the present invention enhances the stability of liners, such as foam liners, preferred by some bottlers as a extra measure of sealing.

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First Claim