Abstract This invention concerns improvements in a plastic closure for a tight-head container having a protruding lip opening and adapted to hold a liquid under pressure wherein the closure includes a base, a generally cylindrically-shaped inner section or skirt adapted to fit into the container opening and a generally cylindrically-shaped outer rim section or skirt having an annular flexible support lip adapted to enclose the outer surface of the container opening and to engage the protruding lip of the container. The improvements include (1) a circumferential strengthening collar disposed on the outer portion of the outer rim section in the region of the rim opposite the closure base, (2) an outward taper of the inner surface of the outer rim section in the region of the collar and (3) a base which is concave in shape. Closure caps of the present invention provide an improved seal with glass bottles, reduce bottle breakage in the capping operation, and provide a ready indication if the bottles have been previously opened.
An assembly of (1) a tight-head glass bottle container having a protruding lip opening and adapted to hold a liquid under pressure, said protruding lip having a rounded outer contour, and (2) a plastic closure for said container comprising a base having a concave shape, a generally cylindrically-shaped hollow inner section adapted to fit into the container opening and having a diameter larger than the diameter of said container opening, the outer surface of said inner section being convex in contour, and a generally cylindrically-shaped outer rim section having an annular, flexible support lip adapted to enclose the outer surface of the container opening and to engage the protruding lip of the container, said outer rim section having a circumferential collar disposed on the outer portion thereof in the region of the rim opposite said base, the apex of the convex contour of said inner section being disposed at a point closer to said base than the location of the support lip of the outer rim section, the closure and collar thereof being constructed of a flexible, resilient plastic and said outer rim section being tapered outwardly in the region of said collar to form a pointed edge at its end opposite said base whereby said pointed rim discourages people from trying to remove by hand said closure from said container and whereby removal of said closure from said container by means of a bottle opener leaves indentations indicating that said container has been opened.
Claim 2
Dependent Claim
245 words
An assembly of (1) a tight-head glass bottle container having a protruding lip opening and adapted to hold a liquid under pressure, said protruding lip having a rounded outer contour, and (2) a plastic closure for said container comprising a base having a concave shape, a generally cylindrically-shaped hollow inner section adapted to fit into the container opening and having a diameter larger than the diameter of said container opening, the outer surface of said inner section being convex in contour, and a generally cylindrically-shaped outer rim section having an annular, flexible support lip adapted to enclose the outer surface of the container opening and to engage the protruding lip of the container, said outer rim section having a circumferential collar disposed on the outer portion thereof in the region of the rim opposite said base, the apex of the convex contour of said inner section being disposed at a point closer to said base than the location of the support lip of the outer rim section, the closure and collar thereof being constructed of a flexible, resilient plastic and said outer rim section being tapered outwardly in the region of said collar to form a pointed edge at its end opposite said base whereby said pointed rim discourages people from trying to remove by hand said closure from said container and whereby removal of said closure from said container by means of a bottle opener leaves indentations indicating that said container has been opened.
Claim 3
Dependent Claim
17 words
The invention of claim 1 wherein the concave shape of said base extends from the periphery thereof.
Claim 4
Dependent Claim
10 words
The invention of claim 1 wherein the plastic is polyethylene.