Heat exchanger with independently mounted tubes and fins

Claim 1

IN A HEAT EXCHANGER CORE OF THE FIN-AND-TUBE TYPE ADAPTED TO WITHSTAND THERMAL STRESSES, THE COMBINATION COMPRISING A PLURALITY OF FLAT-SIDED TUBES DISPOSED IN AXIALLY PARALLEL AND SPACED-APART RELATION, A SERPENTINE-SHAPED FIN BONDED TO EACH OPPOSITE FLAT SIDE OF EACH OF SAID TUBES AND INCLUDING CREST EXTENDING THEREFROM AND DISPOSED ALONG A PLANE OFFSET FROM AND PARALLEL TO THE AXIS OF EACH OF SAID TUES, AND WITH SAID PLANES BEING SPACED APART TO PRESENT A CONTINUOUS SPACE BETWEEN SAID CRESTS THROUGHOUT THE ENTIRE AREA OF SAID PLANES, FLAT SHEETS BONDED TO SAID CRESTS ALONG EACH OF SAID PLANES ON EACH SIDE OF EACH OF SAID TUBES AND ALSO BEING SPACED APART TO PRESENT A CONTINUOUS SPACE BETWEEN SAID SHEETS, AND A HEADER PLATE BONDED TO EACH OF THE OPPOSITE ENDS OF SAID TUBES FOR DIRECTING THE FLOW OF FLUID WITH RESPECT TO SAID TUBES AND GOVERNING THE SPACING BETWEEN SAID TUBES.