Patent ID: 6315511
Filing Date: 2001-11-13
Classification: B21D

Abstract:
A method of forming an easy-open container end panel having a displaceable panel therein and a tab for separating the periphery of the displaceable panel from the end panel, the end panel having a top surface and a bottom surface, comprising the steps of:a) positioning the bottom surface of the end panel on a coining die and a control die;b) engaging a first portion of the top surface of the end panel between a pressure sleeve and the coining die;c) engaging a second portion of the top surface of the end panel adjacent the periphery of the displaceable panel between a coining punch and the coining die while holding pressure on the first portion of the end panel whereby an area adjacent the periphery of the displaceable panel is coined; andd) leaving a third portion of the end panel outboard of the second portion substantially unrestrained during Step C.