| 摘要 |
A method of forming a removable section in a metal wall portion of a container is disclosed herein. A first, area of reduced cross-section is coined the wall portion outside the first coined area and most of the displaced metal is forced inside the first area so that the portion inside the first area is in compression and is substantially dish-shaped in cross section, a weakened line is then produced in the first area to define a removable section.
|
