US Patent 7108268 Metal laminate gasket

A metal laminate gasket includes two surface plates, and an intermediate plate. The second surface plate has a folded-back piece folded back around a sealing hole and disposed on a first bead of the first surface plate surrounding the sealing hole. The first plate has a curved portion with a height higher than that of the folded-back piece and disposed adjacent to an outer peripheral edge of the folded-back piece. The curved portion has a crank shape section or a Z-character shape section. A second bead is provided in the intermediate plate adjacent to the curved portion.