Patent ID: 7147123

Claim:
A metal cap for a container, the metal cap having a top part and a side part connected to and extending peripherally around the top part to form a generally cylindrically shaped cavity with a packing disposed in the cavity and contacting the top part and an upper portion of the side part adjacent the top part, the metal cap having a knurl part with slits formed on an outer perimeter thereof so as to release outside an inner pressure of the container generated from contents contained therein, wherein the knurl parts comprises, plural of knurls having short width slits and at least one knurl having a long width slit; and the knurl having long width slit is formed in a mixture with the knurls having short width slits and wherein the plural of knurls having short width slits and the knurl having the long width slit are formed on and about the side part, the short width slits and the long width slit extending through the side part adjacent the upper portion of the side part yet disposed apart from the packing.