Heating and radiating unit for electrical heaters

Claim 1

A unitary composite striplike heating unit for baseboard or like electric heaters comprising at least two strips of relatively thin metallic material each having a plurality of integral continuous radiating fins stamped to extend laterally outward from one face of each strip generally throughout the entire width of said strip so as to expose substantially the entire areas thereof, two relatively thin strips of insulating material positioned between said metallic strips adjacent the inner surfaces thereof, a wirelike electric heating element positioned between said insulating strips and extending along the length of said strips, the upper and lower edges of one of said metallic strips being folded over the outer face of the other of said metallic strips throughout substantially its entire length tightly to clamp said insulating strips and said heating element within said metallic strips, and sealing means at the ends of the striplike heating unit to guard against entrance of moisture.