Pressure relief system for an aerosol container

Claim 1

A metal container adapted to hold a pressurized product that is dispensed through a valve mounted on said container, said container having a safety venting system therein whereby the contained product is vented from the container through said system when an increase in internal pressure threatens to cause rupture of said container, comprising: a tubular metal body closed at one end; a metal, domed end member attached to the opposite end by a double seam having a countersink segment, said countersink segment having a straight line portion, and said domed end member being adapted to receive said valve to close said container; a plurality of score lines in a peripheral portion of said domed end member, said score lines being in at least a part of the straight line portion of the countersink segment and extending to at least the midpoint of the top portion of the double seam and penetrating only partially through the metal of said domed end member, whereby when the internal pressure within the sealed container increases and threatens to cause rupture of said container, said domed end member will buckle outwardly causing the residual of said scores to fracture to produce a plurality of vents to permit the highly pressurized contents of said sealed container to escape safely therefrom.