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US 4,407,422 AGranted
Composite closure
AssigneeH-C Industries, Inc.
InventorsSheldon L. Wilde, Thomas J. McCandless, Robert M. Saunders
Life of this patent
Estimating the term…
Abstract
A composite closure for a bottle or like container is disclosed which includes a compression molded plastic cap and a plastic sealing liner retained within the cap. Effective retention of the sealing liner in position within the plastic cap is provided by an inwardly extending annular lip disposed between an internal thread formation of the plastic cap and its top wall portion, and a ring of projections extending integrally from the inner surface of the top wall portion of the cap. The sealing liner includes an annular bead portion adjacent to and in engagement with the annular lip and ring of projections so that the liner is effectively retained in position within the plastic cap.
Claims31
A composite closure for a container, comprising
- a plastic cap having a top wall portion and an annular skirt portion having a thread formation,
- a disc-shaped plastic sealing liner disposed within said cap generally adjacent said top wall portion including an annular sealing portion having a generally inwardly facing sealing surface, and
- means for retaining said liner within said cap comprising a plurality of projections on the inner surface of said top wall portion arranged in circumferentially spaced relation in a ring engaging said annular sealing portion.
A composite closure for a container, comprising:
- a plastic cap having a top wall portion and an annular skirt portion having a thread formation,
- a plastic sealing liner disposed within said cap generally adjacent said top wall portion including an annular sealing portion, and
- means for retaining said liner within said cap comprising a plurality of projections on the inner surface of said top wall portion arranged in circumferentially spaced relation in a ring engaging said annular sealing portion,
- said retaining means further including an annular lip extending inwardly of said cap between said thread formation and said top wall portion in engagement with said annular sealing portion, said annular sealing portion being substantially thicker than the central portion of said liner, the inside diameter of said ring of projections being less than the inside diameter of said annular lip, and the outside diameter of said ring of projections being greater than the inside diameter of said annular lip.
1 more element
A composite closure for a container, comprising
- a plastic cap having a top wall portion and an annular skirt portion,
- a plastic cap sealing liner formed in said cap and disposed within said cap adjacent said top wall portion, and
- means for retaining said liner within said cap comprising a plurality of projections on the inner surface of said top wall portion arranged in circumferentially spaced relation in a ring adjacent said skirt portion, and an inwardly extending, linerengaging annular lip spaced from said top wall portion.
A composite closure for a container, comprising
- a compression molded plastic cap having a top wall portion and an annular skirt portion having an internal thread formation,
- a plastic sealing liner positioned within said cap generally adjacent said top wall portion, said liner having a central portion and an annular sealing bead portion, and
- liner retaining means comprising an integral annular lip extending inwardly of said cap between said thread formation and top wall portion and defining with said top wall portion an annular recess within which at least a portion of said annular bead portion is disposed, said annular lip having an inside diameter generally equal to or less than the inside diameter of said thread formation, and a ring of circumferentially spaced projections extending integrally from the inner surface of said top wall portion in engagement with said annular bead portion.
A composite closure for a container, comprising
- a compression molded plastic cap having a top wall portion and an annular skirt having an internal thread formation,
- a plastic sealing liner positioned within said cap generally adjacent said top wall portion, said liner having a central portion and an annular sealing bead portion, and
- liner retaining means comprising an integral annular lip extending inwardly of said cap between said thread formation and said top wall portion and defining with said top wall portion an annular recess within which a portion of said annular bead portion is disposed, said annular lip having an inside diameter generally equal to or less than the inside diameter of said thread formation, and a ring of circumferentially spaced projections extending integrally from the inner surface of said top wall portion in engagement with said annular bead portion, the inside diameter of said ring being less than the inside diameter of said lip, and the outside diameter of said ring being greater than the inside diameter of said lip.
A composite closure for a container, comprising
- a compression molded plastic cap having a top wall portion and an annular skirt having an internal thread formation,
- a plastic sealing liner positioned within said cap generally adjacent said top wall portion, said liner having a central portion and an annular sealing bead portion, and
- liner retaining means comprising an integral annular lip extending inwardly of said cap between said thread formation and said top wall portion and defining with said top wall portion an annular recess within which at least a portion of said annular bead portion is disposed, said annular lip having an inside diameter generally equal to or less than the inside diameter of said thread formation, and a ring of circumferentially spaced projection extending integrally from the inner surface of said top wall portion in engagement with said annular bead portion, wherein the inside diameter of said ring is greater than the inside diameter of said lip.
A composite closure for a container, comprising
- a compression molded plastic cap having a top wall portion and an annular skirt having an internal thread formation,
- plastic sealing liner positioned within said cap generally adjacent said top wall portion, said liner having a central portion and an annular sealing bead portion, and
- liner retaining means comprising an integral annular lip extending inwardly of said cap between said thread formation and top wall portion and defining with said top wall portion an annular recess within which at least a portion of said annular bead portion is disposed, said annular lip having an inside diameter generally equal to or less than the inside diameter of said thread formation, and a ring of circumferentially spaced projections extending integrally from the inner surface of said top wall portion in engagement with said annular bead portion, and gusset means formed integrally with said plastic cap for reinforcing said annular lip.
A composite closure, comprising:
- a molded plastic cap having a top wall portion and a depending annular skirt portion, said cap including an inwardly extending lip spaced from said top wall portion and defining an annular recess therewith having a generally concave, inwardly facing surface;
- and
- a plastic sealing liner disposed adjacent said top wall portion, and including an annular sealing portion having a generally inwardly facing sealing surface, said annular sealing portion substantially filling said annular recess;
- said cap including liner retention means integral with said top wall portion and in engagement with said sealing liner for retaining said liner in position within said cap.
1 more element
A composite closure, comprising
- a molded plastic cap having a top wall portion, a depending annular skirt portion, and an inwardly extending annular lip spaced from said top wall portion and defining an annular recess therewith;
- and
- a plastic sealing liner formed in said cap, including an annular sealing portion engaging said annular lip and substantially filling said recess, said lip being adapted to provide support for sleeve means advanced into said cap during formation of liner in said cap;
- said cap including liner-engaging means integral with said top wall portion adapted to cooperate with said lip for retaining said liner within said cap.
1 more element
Dependencies are inferred from the claim text.