Patent ID: 7007743

Claim:
A heat exchanger tank for a cooling system comprising; a single sheet of material having a cladding on at least one surface thereof and extending through a rectangular cross-section defining a tube wall having tube holes therein and a parallel joint wall spaced from said tube wall with spaced parallel sidewalls interconnecting said joint and tube walls to define a chamber and opposed open ends for permitting fluid flow through said tank, said tank characterized by said joint wall including a tab integrally formed therewith and extending from said joint wall into said chamber and a first of said sidewalls disposed in sealing engagement with the outside of said tab to thereby enclose said tab within said chamber, said first sidewall extending above said joint wall and said tab to define a mounting flange for mounting said tank on the cooling system, and said flange being of a double thickness of said sheet to define a primary wall and a reinforcing wall.