Patent ID: 6038910
Filing Date: 2000-03-21
Classification: B21D

Abstract:
A method of forming a tapered container body from a metal blank, wherein said container body has a tapered sidewall with a predetermined axial height and an integral bottom wall, including the steps of:A) forming the blank into a cup having a substantially cylindrical sidewall and an integral bottom wall with said sidewall having an axial height less than the predetermined axial height of the container body;B) redrawing the cup into a first stage container body by redrawing the sidewall and bottom wall by reducing the diameter of the bottom wall and increasing the axial height of the sidewall to a height substantially equal to the said predetermined axial height of the container body while maintaining the metal thickness of the bottom wall and sidewall to that of the metal blank; andC) redrawing the first stage container body into the container body by imparting a final taper to said sidewall.