Patent ID: 6968719
Filing Date: 2005-11-29
Classification: B21C,Y10S,Y10T

Abstract:
1. A texturing machine for forming a tube having a textured inner surface and a textured outer surface, comprising: a mandrel; an inner knurling tool coupled to the mandrel such that the inner knurling tool is configured to rotate relative to the mandrel, and wherein the inner knurling tool is configured to form a helical pattern of grooves in the inner surface of the tube; an outer knurling tool configured to form a helical pattern of grooves in the outer surface of the tube, wherein a depth of the grooves formed by the outer knurling tool is less than about 0.030 inches; a positioner configured to adjust the position of the outer knurling tool relative to the tube; and a drive configured to rotate the outer knurling tool.