Patent ID: 6915553
Filing Date: 2005-07-12
Classification: B21D,Y10T

Abstract:
1. An apparatus for forming a seam joining a can end to a metal can body, said can end having a peripheral curl, said can body defining a longitudinal axis and having a peripheral flange, comprising: a seaming chuck received by said can end when said can end is placed over said can body to join the can body and can end together, said chuck having an anvil portion and a peripheral anvil wall, wherein said anvil wall is inclined relative to said longitudinal axis at an angle α greater than or equal to about 6 degrees; and a seaming roll having a seaming surface for engaging said peripheral curl in a seaming operation to compress said peripheral curl against said peripheral flange and said peripheral anvil wall to form a seam therebetween; wherein said seaming surface is inclined relative to said longitudinal axis by an angle β, wherein β is greater than or equal to about 4 degrees, and wherein the value of angle β=α± up to about 4 degrees; and wherein said seaming roll and seaming chuck are arranged relative to each other such that said seam is formed such that thinning of the metal in said can body due to the formation of said seam is substantially avoided.