Second generation low gauge crown cap
AssigneePackaging Products Del Peru S.A.
InventorAlfredo Abel MERINO
Life of this patent
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Abstract
A lightweight, crimp-type crown cap for application to a glass beverage bottle, comprises a shell formed of a material comprising steel tinplate. The shell includes a round panel having an upper surface, a lower surface and a peripheral edge. A skirt depends downwardly from the peripheral edge of the panel, the skirt having fewer than 21 corrugations, wherein the corrugations are adapted to be crimped to affix the crown cap to a rim of a bottle opening. A circular groove is formed in the panel, defining a downwardly concave portion on the upper surface of the panel and a corresponding downwardly convex portion on the lower surface of the panel, and the circular groove is arranged to align with the rim of the bottle. A liner is disposed on the lower surface of the panel.
Claims19
A lightweight, crimp-type crown cap for application to a glass beverage bottle having a body, a neck extending up from the body and a rim formed at a top of the neck, the crown cap comprising:
- a shell formed of a material comprising steel tinplate, the shell including:
- a round panel having an upper surface, a lower surface and a peripheral edge;
- a skirt depending downwardly from the peripheral edge of the panel, the skirt having fewer than 21 corrugations, wherein the corrugations are adapted to be crimped to affix the crown cap to the bottle;
- a liner disposed on the lower surface of the panel;
- and
- a circular groove formed in the panel defining a downwardly concave portion on the upper surface of the panel and a corresponding downwardly convex portion on the lower surface of the panel, wherein the circular groove is arranged to align with the rim of the bottle and the liner.
A die for forming a crown cap for application to a glass beverage bottle, comprising:
- a substantially cylindrical die body having a top, a bottom and a substantially cylindrical inner wall defining a hollow interior;
- a plurality of alternately disposed teeth and notches formed around an inner circumference of a top rim of the die body;
- and
- wherein the teeth and notches are configured for forming in a pressing operation, in conjunction with the top rim and cylindrical inner wall, a crown cap having a substantially planar top surface, a circular notch formed proximately to an outer periphery of the planar top surface, and a skirt depending downwardly from the planar top surface and having a plurality of flutes and lands defined by the plurality of teeth and notches;
- wherein the plurality of teeth and notches consists of fewer than 21 teeth and notches.
A method of forming a crown cap for application to a glass beverage bottle, comprising:
- providing a material blank;
- forming in said blank a substantially planar circular crown top;
- forming in said crown top a circular groove disposed proximately to an outer periphery of said crown top;
- forming in said blank a circular skirt depending downwardly from a periphery of the crown top, and a downwardly and radially outwardly extending flange extending from a periphery of the skirt;
- forming in said skirt a plurality of corrugations, the plurality of corrugations consisting of fewer than 21 corrugations;
- and
- cutting from said blank a formed crown top comprising the circular crown top, skirt and corrugated flange.
Dependencies are inferred from the claim text.