Optical cable elements

Details Optical cable elements Optical cable elements

B - Operations, Transporting

29

D

18/103

B29D 11/00 (2006.01) B29C 35/06 (2006.01) B29C 55/22 (2006.01) B29C 63/18 (2006.01) B29C 71/02 (2006.01) G02B 6/44 (2006.01) B29C 35/04 (2006.01)

Patent

CA 1200062

14. ABSTRACT In the manufacture, for use in an optical cable element, of a tube of polymeric material, the drawn-down extruded polymeric tube is annealed by causing it to travel through at least one elongate oven into which is injected at a position intermediate of the ends of the oven gas which will have no deleterious effect on, and which is at a temperature sufficient to anneal, the drawn-down polymeric tube. Turbulent flow and even distribution of hot gas within the oven is caused by means of a perforated elongate baffle, which is positioned between the inlet port through which the hot gas is injected and the advancing drawn-down tube and which extends throughout the length Or the oven, to effect annealing of the drawn-down tube. The drawn-down tube is set by passing it through a cooling device. Use this method of annealing enables the speed of manufacture to be at least twice the speed of manufacture hitherto achieved.

418088

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