Patent ID: 6419110
Filing Date: 2002-07-16
Classification: B21D,B65D

Abstract:
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 16Â° 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.