Patent ID: 8205784

Claim:
A metal joining system, comprising: a first burner assembly configured to selectively heat a first zone, the first burner assembly comprising a burner; and an assembly support at least partially vertically lower than at least a portion of the first heat zone, the assembly support comprising a conveyor; and a first hood vertically above at least a portion of the assembly support, the first hood comprising a concavity, the concavity comprising an open entry side, an open exit side, an open first side, and an open second side, wherein at least one of the first side and the second side are configured to prevent an outflow of heated fluid from the concavity relatively more effectively than at least one of the entry side and the exit side when the outflow is substantially due to a buoyancy of the heated fluid; wherein at least one of the first side and the second side are configured to receive at least one of (1) at least a portion of the first burner assembly and (2) the heat generated by the first burner assembly into the concavity through an open space below the at least one of the first side and the second side.