Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Reexamination Certificate
2005-02-08
2005-02-08
Chin, Peter (Department: 1731)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
C065S384000, C065S424000, C065S432000, C065S477000, C264S001240, C264S002600
Reexamination Certificate
active
06851282
ABSTRACT:
A drawing apparatus1has a drawing furnace11, a heating furnace21, and a resin curing section31. The drawing furnace11has a muffle tube13to which an He gas supply passage15from an He gas supply section14is connected so as to supply He gas. The optical fiber3drawn upon heating by the drawing furnace11is fed to the heating furnace21, whereby a predetermined part of the optical fiber3is annealed at a predetermined cooling rate. The heating furnace21has a muffle tube23to which an N2gas supply passage25from an N2gas supply section24is connected so as to supply N2gas. Thereafter, the optical fiber3is coated with a UV resin39by a coating die38, and the UV resin39is cured in the resin curing section31, whereby a coated optical fiber4is formed.
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Nagayama Katsuya
Ohga Yuichi
Saitoh Tatsuhiko
Takamizawa Hiroshi
Chin Peter
Hug Eric
Sumitomo Electric Industries Ltd.
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