Abstract: A new type of segmented fin 12 for use on a finned tube 18, the unique type of finned tube 18 that is created with the new type of segmented fin 12, specialized serrating wheels 14 and 16 for creating the new type of segmented fin 12, and the process 10 for employing the specialized serrating wheels 14 and 16 to create the new type of segmented fin 12. Each of the segments 26 of the new type of segmented fin 12 is permanently curved, and the segments 26 are coined to increase surface area of the segments 26 and to further shape the sheared edges 42 and 44 of the segments 26 into a more pointed configuration in order to make them more aerodynamic.

Abstract: A finned tube comprising a tube and a texturized solid fin attached thereto, the fin having a proximal edge and an opposite distal edge, the proximal edge being attached helically to the tube so the fin extends outwardly from the tube, the fin having two opposite faces extending from the proximal edge to the distal edge, the two faces of the fin being texturized by regular, small female impressions. In one embodiment the fin is texturized at a location between a fin material supply station and the point of attachment of the fin to the tube. In another embodiment, the fin is texturized at the fin attachment station.