Maryland's Defense Patent Database

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Multi heating zone apparatus and process for making core/clad glass fibers

Patent image
NRL

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.

Inventors: 
Mossadegh, Reza; Cole, Brian; Pureza, Pablo; Sanghera, Jasbinder; Bayya, Shyam; Aggarwal, Ishwar
Patent Number: 
Technical domain: 
Machines and Processing
FIle Date: 
2003-01-06
Grant Date: 
2007-04-03
Grant time: 
1,548 days
Grant time percentile rank: 
28
Claim count percentile rank: 
3
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY