Patent ID: 9707615
Date: 2017-07-18
CPC Classifications: B21D,B65D

Claim:
1. A process for forming a metal container comprising: providing a container having a sidewall, wherein the sidewall has a thickness, a thinnest portion, and a height, and wherein the thickness varies along the height of the sidewall by at least 0.001 inches; and necking the container with a necking die so that a working surface of the necking die contacts a section of the sidewall and reduces a diameter of the section of the sidewall by at least 2% in a single stroke, wherein the thickness of the section of the sidewall being necked varies along the height of the sidewall by at least 0.001 inches at locations which directly contact the necking die before and after necking, wherein the section of the sidewall being necked includes the thinnest portion of the sidewall.