Optical waveguides – Optical transmission cable – Loose tube type
Reexamination Certificate
2001-03-23
2008-03-18
Wong, Tina M. (Department: 2874)
Optical waveguides
Optical transmission cable
Loose tube type
C385S100000, C385S105000, C385S109000
Reexamination Certificate
active
07346244
ABSTRACT:
A foam polymer jacketed rigid strength member for a fiber optic cable is disclosed, as is the method for its production. The foam jacket is made by feeding into an extruder a base polymer material, preferably a resin, such as polypropyene. The base material is melted in the extruder and a blowing agent is admixed. As the mixture exits the extruder, the polymer is expanded into a cellular foam. The polymer is foamed onto a rigid strength member by means of a crosshead. The resulting jacketed rigid strength member demonstrates improved resistance to thermal contractions reducing the contribution of stresses in the fiber optic cable components.
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Cheatle Wayne
Gowan Russell W.
Risch Brian
Draka Comteq B.V.
Wong Tina M.
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