Pop-a-top canning jar lids

Claim 1

A closure assembly for a mason-type glass jar having an externally threaded top neck with an upper edge defining a wide mouth comprising an internally threaded skirt portion adapted to be screwed on said neck, and a transverse lid portion formed in one piece with said skirt portion covering said mouth, said transverse lid portion comprising a relatively narrow annular rim section extending inwardly from the upper end of said skirt portion to overlie the upper edge of said neck and a center section, there being a sealant annulus adapted to be compressed between said rim section and said jar mouth edge, means forming a continuous weakened region in said lid portion located to define an iner periphery of said rim section and an outer periphery of said center section and thereby establishing a boundary between said rim section and said center section, and means providing a continuous longitudinal slit in said threaded portion and the adjoining rim section, latch means on said skirt portion for contracting said skirt portion about the neck threads when the assembly is mounted on the jar, and a manual pull member on said center section whereby when said pull member is operated said entire center section may be removed from said lid portion to expose the contents of the jar on which the closure assembly is mounted.