Spinneret for producing circular cross section yarn and...

Details Spinneret for producing circular cross section yarn and... Spinneret for producing circular cross section yarn and...

2007-01-23

2007-01-23

Del Sole, Joseph S. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Plural orifices

C425S464000, C264S211140, C264S177130

Reexamination Certificate

active

10698163

ABSTRACT:
A melt extrusion spinneret plate has at least one non-circular capillary orifice for producing at least a single filament of circular cross-sectional shape. This non-circular cross-sectional shape of the extrusion capillary, when used to extrude filaments of circular cross-sectional shape, extends the spinneret wipe life by lessening the amount of thermal deposits, which extends the time between wipe cycles. As a result of increased wipe life, the productivity of the process is increased.

REFERENCES:
patent: 4221755 (1980-09-01), Wellenhofer et al.
patent: 5154908 (1992-10-01), Edie
patent: 5432002 (1995-07-01), Kramer
patent: 6673442 (2004-01-01), Johnson et al.

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