Carbon coating for a starting member used in producing...

B - Operations – Transporting – 29 – D

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B29D 11/00 (2006.01) B29C 73/00 (2006.01) B29C 73/34 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01)

Patent

CA 1115509

080977 Dominick-Scherer 2-1 D-7309 (CO-76) CARBON COATING FOR A STARTING MEMBER USED IN PRODUCING OPTICAL WAVEGUIDE Abstract Of The Invention In making a preform for an optical waveguide, the bait rod is coated with carbon. After the preform is built up on the bait rod, it is easily removed. The carbon coating produces a smooth improved inner surface in the preform, thereby eliminating flaws which otherwise may be present when the preform is drawn into a waveguide.

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