Single-wall pipe of plastics or other mouldable material and...

Details Single-wall pipe of plastics or other mouldable material and... Single-wall pipe of plastics or other mouldable material and...

B - Operations, Transporting

29

C

18/756, 18/522.5

B29C 49/38 (2006.01) B29C 47/06 (2006.01) B29C 47/12 (2006.01) B29C 49/00 (2006.01) B29D 23/00 (2006.01) F16L 9/12 (2006.01) B29C 49/22 (2006.01)

Patent

CA 1225209

Abstract Single-wall pipe, tube or like conduit (9,44) having smooth inner surfaces and a mechanical-strength enhancing pattern of walls, flanges or ridges on the outer surface thereof, the conduit being made of plastics or like extrudable material. The conduit according to the invention is especially characterized in that the conduit (9,44) is of a composite structure and com- prises at least two different concentric parts (44", 44'''), these parts being made of different materials. The invention also refers to a method and apparatus for manu- facturing of conduits e.g. according to the invention. Fig. 3 for publication

467947

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