Apparatus for the thermal treatment of textile fibers
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United States of America Patent
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Aug 4, 1992
Grant Date -
N/A
app pub date -
Dec 4, 1990
filing date -
Dec 4, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heat treatment chamber for textile threads continuously treats the textile threads utilizing forced circulation units of a treatment fluid. The circulation units are these units being crossed consecutively by a conveyor belt that carries a lap of threads. Each circulation unit is provided with a blower and a closed circuit or an open circuit for the treatment fluid (air or steam). A heat exchanger is positioned near the conveyor belt, in such a way that the fluid crosses it and takes the desired temperature immediately before crossing the lap of threads. The heat exchanger can be formed of longitudinal tubes criss-crossed by heating or cooling fluid. Such a chamber is usable either to preheat the threads, to maintain them heated, or to cool them. The forced circulation units can ensure a gradual variation in the temperature of the threads in the same treatment chamber, or can enable a homogeneity to be obtained in a particular portion of the tunnel, by virtue of the communication between at least two forced circulation units that function in open circuit with the surrounding zone.
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