Patent ID: 7750251

Claim:
A frame member for use with a skin member in forming an electromagnetic interference shielded panel, said frame member comprising: a base wall extending between a first end and a second end; a first side wall extending between a first end and a second end, said first end of said first side wall attached to said first end of said base wall, said first side wall including a first surface extending from a first end to a second end, a lip extending outwardly from said second end of said first surface to an outer end, said first surface and said lip forming a first recess, a second surface extending from a first end to a second end, said first end of said second surface located adjacent said outer end of said first lip, and a third surface extending between a first end and a second end, said second end of said third surface being located adjacent said second end of said second surface, said third surface being located outwardly from said second surface such that a second recess is formed by said second and third surfaces, and an elongated rib extending outwardly from said second surface of said first side wall; a second side wall extending between a first end and a second end, said first end of said second side wall attached to said second end of said base wall, said second side wall being spaced apart from and generally parallel to said first side wall; whereby said rib provides sacrificial material for welding the skin member to said first side wall of said frame member.