Abstract: A wire profile comprises a rib portion and a plurality of teeth over the length of the rib portion. The teeth are sloped with a back slope representing the backbone of the teeth and a front slope representing the side in direct contact with fiber. The back slope has a tangent forming a hack angle with the rib portion, and the front slope is divided into at least two segments, a tip segment converging with the back slope to form a tip of the teeth and serving to penetrate between fibers, and an undercut segment to retain the fibers. The undercut segment has a tangent forming an undercut angle with the rib portion, and the undercut angle is at each point in the undercut segment greater than the maximum of the hack angle and smaller than the smallest value of the tip angle.

Abstract: A wire profile for card clothing comprising a rib portion and plurality of teeth over the length of said rib portion, wherein said teeth are sloped with back slope representing the backbone of said teeth and front slope representing the side in direct contact with fibre, said back slope having a tangent forming a back angle with the rib portion, said front slope being divided into at least two segments, a tip segment converging with the said back slope to form a tip of said teeth and said tip segment serving to penetrate between fibres, said tip segment having a tangent forming a tip angle with the rib portion, and an undercut segment to retain the fibres, said undercut having a tangent forming an undercut angle with the rib portion, said undercut angle being at each point in the undercut segment greater than the maximum of the back angle and being smaller than the smallest value of the tip angle.