Patent Number: 6,253,440

Title: Method of manufacturing self cooling beverage container

Abstract: A method of forming a flange in the bottom of a container by first removing a portion of the container bottom and then forming or swaying the material around the opening to form a flange extending away from the container bottom. A valve and valve cup assembly along with a heat exchange unit are positioned adjacent the flange and the combination is crimped to permanently affix the heat exchange unit to the bottom of the container.

Inventors: Chen; Jeffrey W. (Irvine, CA)

Assignee: Chill-Can International, Inc.

International Classification: B21D 51/38 (20060101); B21D 51/26 (20060101); B21D 039/00 (); B21D 039/03 ()

Expiration Date: 07/03/2018