Textiles: manufacturing – Thread finishing – Surface modification of running length
Patent
1993-02-04
1994-10-04
Crowder, Clifford D.
Textiles: manufacturing
Thread finishing
Surface modification of running length
28248, 28250, 73 377, 364470, 364510, D02G 112, G01N 3336
Patent
active
053513746
ABSTRACT:
Threads made from thermoplastic materials are textured, in that they are heated by a delivery medium in a delivery channel and conveyed through an orifice into a stuffer box where they are stuffed to form a plug. In order to maintain plug formation constant, the orifice area is monitored in a sensory manner and the measured signals are used for monitoring purposes as a measured quantity in a control loop, in which the supply of damming back medium, the conveying away speed of the plug, the position of the stuffer box walls, or the supply of delivery medium are used as manipulated variables. The measuring signals produced by monitoring can be compared with thresholds to produce control signals corresponding to the comparison result for activating alarm, warning or stopping elements. Sensory monitoring is carried out by measuring the dynamic pressure prevailing in the delivery channel close to the orifice, by measuring the dynamic pressure in a fluidic nozzle issuing into the stuffer box, or by monitoring with an optical sensor the interior of the stuffer box.
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Fibre M.: Non-Isothermal Texturing at High Speed, Textile Institute and Industry, Jun. 1975; pp. 172-173: Foster.
Graf Felix
Grossenbacher Peter
Maier Jorg
Nabulon Werner
Wirz Armin
Calvert John J.
Crowder Clifford D.
Hand Francis C.
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