Apparatus for vitrifying soot preform for optical fiber
US5513983A · kind A · utility
5Cited by
6References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Jun 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for vitrifying a soot preform from which an optical fiber is produced by drawing, is composed of a main vacuum chamber 20 in which a muffle tube 70 for vitrifying the soot preform PF is located, and an auxiliary vacuum chamber 30 mounted on the main vacuum chamber 20 and communicated therewith through a passage, and a gate valve 60 for opening and closing the passage. The muffle tube 70 has a inner surface covered with silicon carbide layer 70a.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.