초록 ▼

A can end is provided, which includes a severable panel, a peripheral scoreline defining the periphery of the severable panel, an opening mechanism such as a pull tab, a rivet coupling the pull tab to the severable panel, and a rivet base scoreline in the public side of the severable panel within ab

A can end is provided, which includes a severable panel, a peripheral scoreline defining the periphery of the severable panel, an opening mechanism such as a pull tab, a rivet coupling the pull tab to the severable panel, and a rivet base scoreline in the public side of the severable panel within about 0.025 inch or less of the stem of the rivet. The rivet base scoreline includes an arcuate head portion, first and second arm portions extending from the arcuate head portion, and first and second ends. The base of the rivet has a radius of curvature forming an intersection between the stem of the rivet and the public side of the severable panel. The arcuate head portion of the rivet base scoreline is contiguous with the radius of curvature. The pull tab includes a nose portion having a number of apertures aligned with corresponding portions of the rivet base scoreline disposed thereunder.

대표청구항 ▼

1. A can end structured to be affixed to a can body, the can end comprising: a severable panel having a periphery, an interior, a product side structured to face toward the can body when the can end is affixed to the can body, and a public side structured to face away from the can body when the can

1. A can end structured to be affixed to a can body, the can end comprising: a severable panel having a periphery, an interior, a product side structured to face toward the can body when the can end is affixed to the can body, and a public side structured to face away from the can body when the can end is affixed to the can body;a peripheral scoreline defining the periphery of the severable panel;an opening mechanism coupled to the severable panel, the opening mechanism being actuatable to sever the peripheral scoreline;a rivet coupling the opening mechanism to the severable panel, the rivet having a base disposed at the severable panel, a stem extending outwardly from the severable panel, an inboard side facing the interior of the severable panel, and an outboard side facing the periphery of the severable panel; anda rivet base scoreline in the public side of the severable panel, the rivet base scoreline being disposed about 0.025 inch or less from the stem of the rivet,wherein said rivet base scoreline includes an arcuate head portion substantially disposed on the inboard side of the rivet, the arcuate head portion having a first radius of curvature,wherein the rivet base scoreline further includes first and second arcuate arm portions having a second radius of curvature and first and second ends, the radius of curvature of each of the arcuate arm portions extending from the arcuate head portion to the corresponding one of the first and second ends, the first radius of curvature of the arcuate head portion is the same as the second radius of curvature of the first and second arm portions, andwherein the first and second ends of the first and second arcuate arm portions of the rivet base scoreline generally extend toward the outboard side of the rivet. 2. The can end of claim 1 wherein the base of the rivet has a radius of curvature; wherein the radius of curvature forms an intersection between the stem of the rivet and the public side of the severable panel; and wherein the arcuate head portion of the rivet base scoreline is contiguous with the radius of curvature of the base of the rivet. 3. The can end of claim 1 wherein the first and second arm portions of the rivet base scoreline extend beyond the outboard side of the rivet toward the periphery of the severable panel. 4. The can end of claim 1 wherein the opening mechanism has a longitudinal axis; wherein, upon actuation of the opening mechanism, the rivet base scoreline is structured to propagate toward the peripheral scoreline of the can end, thereby defining a bend axis; wherein the bend axis extends generally perpendicularly with respect to the longitudinal axis of the opening mechanism; and wherein the bend axis is disposed proximate to the peripheral scoreline. 5. The can end of claim 1 wherein the opening mechanism is structured to be lifted, pivoted to a substantially inverted position, and pulled, in order to remove the severable panel; wherein, responsive to being lifted, the opening mechanism is structured to initially sever the peripheral scoreline; and wherein, responsive to being pivoted to the substantially inverted position, the opening mechanism is structured to sever at least 40 percent of the peripheral scoreline. 6. The can end of claim 1 wherein the opening mechanism is a pull tab; wherein the pull tab includes a nose portion and a lift portion disposed opposite the nose portion; wherein the nose portion of the pull tab overlays at least a portion of the rivet base scoreline; and wherein the nose portion of the pull tab includes a number of apertures structured to be aligned with corresponding portions of the rivet base scoreline thereunder. 7. The can end of claim 1 wherein the severable panel includes a number of projections protruding from the severable panel; and wherein the number of projections support the opening mechanism and resist undesired rotation of the opening mechanism relative to the rivet. 8. The can end of claim 1 wherein the opening mechanism is a pull tab; wherein the pull tab includes a nose and a lift portion disposed opposite and distal from the nose; wherein the stem of the rivet has a diameter and a centerline; wherein the pull tab has a dimension, X, measured by the distance between the centerline of the rivet and the nose of the pull tab, and a dimension, Y, measured by the total length of the pull tab between the nose of the pull tab and the lift portion of the pull tab; and wherein the ratio X/Y is about 0.20 or less. 9. The can end of claim 8 wherein the diameter of the stem of the rivet is about 0.1875 inch or less.