Array of nozzles for extruding multiple cellulose fibers

Details Array of nozzles for extruding multiple cellulose fibers Array of nozzles for extruding multiple cellulose fibers

2008-04-11

2011-10-04

Del Sole, Joseph (Department: 1743)

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

Orifice for filaments or fibers

C425S197000, C425S199000, C425S19200R, C264S177110

Reexamination Certificate

active

08029259

ABSTRACT:
An array of nozzles is disclosed for forming multiple cellulose fibers. Each nozzle has a longitudinal central axis and includes a tube with a cross-section having a diameter through which an aqueous solution of cellulose and a solvent can be extruded into a molten filament. A first opening is present which surrounds each of the tubes. The first opening has a cross-section with a diameter, and each of the first openings is capable of emitting a pressurized gas which surrounds one of the extruded molten filaments. At least three second openings are spaced away from each of the first openings. Each of the second openings is capable of emitting a pressurized gas stream essentially parallel to the longitudinal central axis of each of the nozzles, and each of the pressurized gas streams functions to shroud one of the extruded molten filaments.

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