Abstract: Fibers, which are substantially longitudinally profiled, are wound both around a cylindrical mandrel and a metallic double cone-shaped tip which is engaged onto said mandrel. Said fibers are turned back about studs distributed on a ring which is mounted on a threaded portion extending from the tip, whereupon said longitudinal fibers are binded thereto by means of circumferential fibers before the polymerization process of the tube has been completed. The composite tubes thus produced may be used in off-shore oil prospecting.

Abstract: An anti-electrostatic brush comprising handle means (1,3:1', 3') leading to receiving means for bristle support means (2,2') with said support means being located in the receiving means and having bristles (21, 21') extending therefrom, characterized in that the bristle support means (2,2') is electrically conductive and has an extension portion (22') or extension portions (22) extending towards the handle means (1,3:1', 3') and to a region (23, 23') where said portion(s) will be contacted by the hand of a user during normal brushing operations.