Patent ID: 7115233

Claim:
A reformer comprising: first and second tubular members, each of the first and second tubular members including respective first and second tubular ends, the first and second tubular members being disposed coaxially along an axis; a first annular plate member including an external rim disposed within and hermetically sealed to the first tubular end of the first tubular member at the external rim by a first folded seam; a second annular plate member including an external rim and an internal rim, disposed between and hermetically sealed to the first tubular ends of the first and second tubular members at the internal and external rims, respectively, by second and third folded seams, respectively, wherein the first tubular ends of the first and second tubular members are located at axially different positions with the first tubular end of the first tubular member projecting relative to the first tubular end of the second tubular member; and a catalyst disposed between the first and second tubular members.