Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Reexamination Certificate
2007-04-03
2007-04-03
Walls, Dionne A. (Department: 1731)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
C065S404000, C065S405000, C065S502000
Reexamination Certificate
active
10339255
ABSTRACT:
A process includes the steps of disposing a solid core glass rod at a point removed from hot temperature that can cause crystallization in the core glass rod, disposing a solid clad glass rod at a point removed from the core glass rod; softening to the flowing condition the solid clad glass rod, transferring the softened clad glass to a lower point, the softened clad glass having a central void therethrough, heating the softened clad glass above its crystallization temperature, cooling the softened clad glass to a draw temperature, transferring the solid core glass rod into the central void in the softened glad glass, softening to the flowing condition the solid core glass rod with the heat from the softened and cooled clad glass, and drawing the core/clad, glass fiber by allowing the clad and core glasses to flow in the form of a fiber.
REFERENCES:
patent: 4145200 (1979-03-01), Yamazaki et al.
patent: 5651083 (1997-07-01), Kortan et al.
patent: 5900036 (1999-05-01), Mossadegh et al.
patent: 6021649 (2000-02-01), Sanghera et al.
Aggarwal Ishwar
Bayya Shyam
Cole Brian
Mossadegh Reza
Pureza Pablo
Dehghan Queenie
Karasek John J.
Koshy Suresh
United States of America as represented by the Secretary of the
Walls Dionne A.
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