C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/82
C03B 37/012 (2006.01) C03B 23/07 (2006.01)
Patent
CA 1317464
Abstract: Methods and apparatus are provided for overcladding a preform rod. The preform rod is aligned with and inserted into an overcladding tube. The outer diameter of the preform rod and the inner diameter of the tube are such that the clearance between the tube and the rod does not exceed a predetermined value. Successive increments of length of the tube and rod therein are subjected to a controlled zone of heat while the pressure inside the tube is maintained at a value which is substantially less than that outside the tube. This causes the tube to be collapsed onto the preform rod to provide an overclad preform and subsequently is substantially concentric with respect to the optical fiber core.
532470
Baumgart Jerry William
D'annessa Anthony Thomas
Flegal William Malcolm
Geyling Franz Thomas
Miller Thomas John
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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