Can shell and double-seamed can end

摘要

A drawn aluminum can shell has a peripheral crown which is double-seamed with an end portion of an aluminum can body to provide a can end having a generally flat center panel connected by an inclined curved or straight panel wall to an inclined inner wall of an annular U-shaped countersink. The countersink has an outer wall which connects with an inclined lower wall portion of a chuck wall at a junction below the center panel, and the chuck wall has a curved or inclined upper wall portion which connects with an inner wall of the crown. The chuck wall also has an intermediate wall portion forming a break, and the inner bottom width of the countersink is less than the radial width of the panel wall. The inclined upper wall portion of the chuck wall extends at an angle greater than the angle of the inclined lower wall portion of the chuck wall.

主权项

1. A one-piece metallic end closure adapted for double seaming to a container, comprising:
a peripheral curl having a first end and a second end, said first end adapted for interconnection to a neck of the container; a horizontal circular center panel with a vertical center axis; an inclined linear panel wall with a substantially uniform thickness interconnected on an upper end to said horizontal circular center panel at a first radius of curvature, said inclined linear panel wall having an angle between 30° and 60° relative to said center axis; a countersink comprising an inner wall portion, an outer wall portion, and a generally U-shaped cross-sectional configuration, said inner wall portion interconnected to said inclined linear panel wall at a second radius of curvature; and a chuck wall comprising an inclined lower wall portion interconnected to said countersink outer wall portion, and an upper wall portion interconnected to said second end of said peripheral curl at a junction, said junction formed from a third radius of curvature and a fourth radius of curvature oriented in opposite directions and positioned above a lowermost portion of said countersink a distance of at least about 0.133 inches.