초록 ▼

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 slightly domed-shaped center panel extending to a curved panel wall forming the inner wall of an annular U-shaped countersink. The countersink has a gene

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 slightly domed-shaped center panel extending to a curved panel wall forming the inner wall of an annular U-shaped countersink. The countersink has a generally cylindrical outer wall and a generally flat annular bottom wall, and the outer countersink wall extends to a frusto-conical chuckwall which extends to an inner wall of the double-seamed crown at an angle between 16.degree. and 30.degree. with the can end center axis. The overall height of the can end from the crown to the chuckwall is less than 0.230 inch, and the top portion of the center panel defines a plane extending substantially through the junction of the frusto-conical chuckwall with the inner double-seamed wall of the crown.

대표청구항 ▼

1. A sheet metal can shell having a vertical center axis and a curled peripheral crown adapted to be double-seamed to an end portion of a formed sheet metal can body, said shell comprising a circular center panel connected by a curved panel wall to an inner wall of a countersink having a U-shaped cr

1. A sheet metal can shell having a vertical center axis and a curled peripheral crown adapted to be double-seamed to an end portion of a formed sheet metal can body, said shell comprising a circular center panel connected by a curved panel wall to an inner wall of a countersink having a U-shaped cross-section and a generally vertical outer wall, a frusto-conical chuckwall extending at an angle greater than 16.degree. relative to said center axis and connected to said outer wall of said countersink at a first junction, said crown having an inner wall connected to said chuckwall at a second junction, said countersink having a radius of curvature substantially smaller than a radius of curvature of said curved panel wall, said first junction being spaced below the level of said center panel with a vertical distance between said first junction and said second junction being greater than the width of said countersink at the bottom of said countersink between said inner and outer walls of said countersink, and said radius of curvature of said curved panel wall being greater than said width of said countersink.