Abstract: The procedure for manufacturing thin profiled strips, made up of continuous unidirectional fibers embedded in a thermoplastic resin, consists of impregnating a lap (1) of parallel fibers with resin particles, achieving resin fusion, forming the profiled strip and of cooling the latter.The lap (1) of fibers is dipped into a bath (26) of resin particles, mechanically impregnated with the particles, by feeding it for instance around rollers (15, 16, 17) immersed in the resin particles and the excess particles are removed to obtain the desired resin to fiber content ratio.Use of profiled strips obtained, in particular for outwardly reinforcing tubes or for producing moulded items.

Abstract: According to the method of the invention there is wound, around a hollow body (1) and in substantially contiguous turns, a flexible strip (2), the latter strip being fixed onto the hollow body. The strip is of a material, the tensile limit of which is in excess of that of the material of which the hollow body (1) is made, and when wound around the hollow body, a tension is applied thereto which is sufficient for the stresses which may develop within the body and the winding of the strip (2) to reach their permissible maximum limits at substantially the same time, when the hollow body is used under pressure.

Abstract: The pipeline for the conveying of hot or cold fluids comprises metallic and rigid tubes (2) which are assembled directly end to end, a covering (5) of heat-insulating material in the form of sleeves (6) which are made on the basis of a cement filled with thermically insulating inorganic particles, with said covering (5) being disposed inside said tubes (2) and being in direct contact with the fluid conveyed by the pipeline.The thickness of the covering (5) made of heat-insulating material is determined in such a way that the expansion or contraction of the tubes (2) upon the feeding of hot or cold fluid into the pipeline remains compatible with the mechanical resistance of the tubes and that the outer diameter of the sleeves (6) is slightly smaller than the interior diameter of the tubes (2), with the annular space between said tubes (2) and said sleeves (6) being filled by a sealing material (8) which is injected under pressure and is more elastic than the material of the sleeves.