发明名称 |
Method and apparatus for texturizing thermoplastic yarn |
摘要 |
Thermoplastic yarn is texturized by the known method of forwarding it in a heated condition to a crimping zone at the entrance of a stuffer chamber (7) so as to form a plug (8) of crimped yarn within the chamber and withdrawing the yarn from the other end of the plug at a speed which is related to the input speed. The improvement comprises deriving signals from the speed of the yarn plug (8) in the stuffer chamber (7) by means of a sensing wheel (11) which drives a gapped monitoring disc (13). The disc (13) operates to intercept a beam of light from a source (14) which is directed on to a photo-sensor (15). The output of the photo-sensor is supplied to an electrical controller (36) which measures the time during which light is received for each gap in the disc (13) to provide a measure of the speed of the yarn plug. The resultant signals are used to control the temperature of the yarn passing to the crimping zone in such a way as to maintain the speed and hence the quality of the bulk yarn substantially constant. For this purpose, the signals from the controller (36) are fed to a heater controller (28) to adjust the current to a heating element (5) in a chamber (4) through which steam passes before feeding the yarn (1) through a jet passage (2) leading to the chamber (7).
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申请公布号 |
US4337557(A) |
申请公布日期 |
1982.07.06 |
申请号 |
US19810267529 |
申请日期 |
1981.05.27 |
申请人 |
JAMES MACKIE & SONS LIMITED |
发明人 |
MCDONALD, WILLIAM J.;ROBINSON, BRIAN |
分类号 |
D02G1/16;D02G1/12;(IPC1-7):D02G1/12 |
主分类号 |
D02G1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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