Apparatus and method for heat-setting carpet yarns with hot...

Details Apparatus and method for heat-setting carpet yarns with hot... Apparatus and method for heat-setting carpet yarns with hot...

2006-07-11

2006-07-11

Hurley, Shaun R (Department: 3765)

Textiles: spinning, twisting, and twining

Apparatus and processes

Twist setting

C057S289000

Reexamination Certificate

active

07073318

ABSTRACT:
An apparatus and method for texture heat-setting bulk continuous filament (BCF) yarns in hot air heat-setting machines that includes a preheating device/step using a mixture of steam and atmospheric air to preheat a twisted BCF yarn bundle to develop crimp memory and provide cohesion to the twisted BCF yarn bundle. Yarn bundle cohesion during texture heat-setting helps to avoid frequent breaks at the winder of the hot air heat-setting machine. The addition of the preheating device/step significantly improves the ability of hot air heat-setting machines to maintain continuous operation during texture setting of BCF yarns and makes the hot air heat-setting method commercially viable for this application.

REFERENCES:
patent: 5233736 (1993-08-01), Hill
patent: 5414987 (1995-05-01), Knoff et al.
patent: 5647109 (1997-07-01), Steiner et al.
patent: 6094790 (2000-08-01), Weiss

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