Method of attaching closure member to filter housing

The method of making an oil filter housing comprising the steps of providing a cup-shaped housing member having a side wall defining an open end, said open end having a marginal edge defining the opening into said cup-shaped member, forming a bead at the marginal edge of said cup-shaped member, providing a closure member for the open end of said cup-shaped member, said closure member defining a marginal edge, the marginal edge of said closure member being of substantially the same thickness at the rest of said closure member, the thickness of said closure member being substantially greater than the thickness of said side wall of the cup-shaped member, bending said marginal edge into an annular rim, forming an annular bead-receiving cavity in said rim, installing the bead on the marginal edge of said cup-shaped member into said cavity, bending said rim into permanent engagement with said bead while maintaining the thickness of said rim of said closure member substantially equal to the thickness of the rest of the closure member and substantially greater than the thickness of said side wall.