Fiber-drawing furnace for drawing down an optical-fiber preform into an optical fiber
US5848093A · kind A · utility
3Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The fiber-drawing furnace includes a graphite tube positioned vertically, heated by induction, and subjected internally to an inert atmosphere, said tube internally defining a fiber-drawing chamber. In the furnace said graphite tube is a double-walled tube having an inner wall and an outer wall, its inner wall is porous and separates the fiber-drawing chamber from a peripheral chamber defined between the walls and subjected to a flow of inert gas which diffuses through said porous wall into said fiber-drawing chamber. Application to drawing down an optical-fiber preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.