optical fiber preform manufacturing technologies patents

#Optical fiber preform manufacturing technologies patents pdf

If the temperature within the heating furnace is set to achieve the optimum properties of the optical fiber formed about the start-up time of the drawing operation, followed by keeping the furnace temperature constant, as in the conventional method referred to above, a change takes place in the amount of heat actually imparted to the optical fiber preform. Naturally, an optical fiber preform is rendered bulky and larger in outer diameter.

taperedĪ longer optical cable is required nowadays. by modification of the core tube shape or by using baffles using means for gradually reducing the cross-section towards the outlet or around the preform draw end, e.g.

C03B2205/92- Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g.

by modification of the core tube shape or by using baffles

C03B2205/90- Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g.

C03B2205/72- Controlling or measuring the draw furnace temperature.

C03B2205/60- Optical fibre draw furnaces.

C03B2205/44- Monotoring or regulating the preform feed rate.C03B2205/40- Monitoring or regulating the draw tension or draw rate.C03B2205/00- Fibre drawing or extruding details.fibre draw towers, preform alignment, butt-joining preforms or dummy parts during feeding C03B37/02736- Means for supporting, rotating or feeding the tubes, rods, fibres or filaments to be drawn, e.g.C03B37/027- Fibres composed of different sorts of glass, e.g.direct drawing of molten glass from nozzles Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. C03B37/025- Manufacture of glass fibres or filaments by drawing or extruding, e.g.direct drawing of molten glass from nozzles Cooling fins therefor C03B37/02- Manufacture of glass fibres or filaments by drawing or extruding, e.g.C03B37/01- Manufacture of glass fibres or filaments.C03B37/00- Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags.C03B- MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES.Assignors: GOLDMELER, STEVEN Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). reassignment RAND INTERNATIONAL LEISURE PRODUCTS, LTD. Assignors: INABA, SHIGEO, MAEDA, KEIGO, TATEISHI, TOSHIAKI Application granted granted Critical Publication of US5961681A publication Critical patent/US5961681A/en Assigned to RAND INTERNATIONAL LEISURE PRODUCTS, LTD. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from JP7-286922 external-priority Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd Assigned to FURUKAWA ELECTRIC CO., LTD., THE reassignment FURUKAWA ELECTRIC CO., LTD., THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Furukawa Electric Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US08/739,180 Inventor Toshiaki Tateishi Keigo Maeda Shigeo Inaba Current Assignee (The listed assignees may be inaccurate.

#Optical fiber preform manufacturing technologies patents pdf

Google Patents Method of drawing optical fiber preform to manufacture optical fiberĭownload PDF Info Publication number US5961681A US5961681A US08/739,180 US73918096A US5961681A US 5961681 A US5961681 A US 5961681A US 73918096 A US73918096 A US 73918096A US 5961681 A US5961681 A US 5961681A Authority US United States Prior art keywords optical fiber preform temperature fiber preform heating furnace Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5961681A - Method of drawing optical fiber preform to manufacture optical fiber US5961681A - Method of drawing optical fiber preform to manufacture optical fiber