Method and apparatus for continuously unwinding and processing a yarn
First Claim
1. A method of continuously processing a yarn comprising the steps of:
- providing a yarn feed package and a yarn reserve package, with the trailing end of the yarn feed package joined to the leading end of the yarn reserve package by a piecing, serially withdrawing the yarn from the yarn feed package and the yarn reserve package so that the withdrawn yarn is transferred from the yarn feed package to the yarn reserve package, sensing when the withdrawn yarn is transferred from the feed yarn package to the yarn reserve package and generating a responsive signal, subjecting the withdrawn yarn to a treatment process, and supplying the signal to a controller to cause a change in the treatment process and/or a change of the feed yarn package.
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Abstract
A method and an apparatus for continuously unwinding a yarn from a yarn package which may be associated with a method and apparatus for texturing the withdrawn yarn. The yarn is withdrawn from a feed yarn package supported in a creel, and the trailing yarn end of the feed yarn package connects to a leading yarn end of a second feed yarn package (reserve package) by a knot-type piecing to achieve a continuous advance of the yarn for its treatment or processing. A sensor is provided which detects and signals the yarn change from the feed yarn package to the reserve package after the feed yarn package is unwound, and the signal may be used to control the texturing process.
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Citations
33 Claims
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1. A method of continuously processing a yarn comprising the steps of:
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providing a yarn feed package and a yarn reserve package, with the trailing end of the yarn feed package joined to the leading end of the yarn reserve package by a piecing, serially withdrawing the yarn from the yarn feed package and the yarn reserve package so that the withdrawn yarn is transferred from the yarn feed package to the yarn reserve package, sensing when the withdrawn yarn is transferred from the feed yarn package to the yarn reserve package and generating a responsive signal, subjecting the withdrawn yarn to a treatment process, and supplying the signal to a controller to cause a change in the treatment process and/or a change of the feed yarn package. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of texturing a synthetic multifilament yarn, comprising the steps of
providing a yarn feed package and a yarn reserve package, with the trailing end of the yarn feed package joined to the leading end of the yarn reserve package by a piecing, serially withdrawing the yarn from the yarn feed package and the yarn reserve package so that the withdrawn yarn is transferred from the yarn feed package to the yarn reserve package, sensing when the withdrawn yarn is transferred from the feed yarn package to the yarn reserve package and generating a responsive signal, texturing the withdrawn yarn, winding the textured yarn to form cross wound packages, and supplying the signal to a controller of the texturing process to cause a change in the process and/or a change of the feed yarn package.
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21. An apparatus for continuously unwinding a yarn, comprising
at least two feed positions, with one of the feed positions accommodating a feed yarn package and the other feed position a reserve package, conveying means for withdrawing the yarn from the feed yarn package and from the reserve package, and with the trailing end of the yarn from the feed yarn package being knotted to the leading end of the yarn from the reserve package, a sensor for detecting and signaling the transfer of the withdrawn yarn from the feed yarn package to the reserve package, and a controller for causing a change in a subsequent treatment process and/or a change of the feed yarn package responsive to a signal from the sensor.
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26. A texturing machine for texturing and winding a yarn comprising
at least two feed positions for mounting a feed yarn package and a reserve package, and wherein a trailing yarn end of the feed yarn package is knotted to a leading yarn end of the reserve package, at least one yarn feed system positioned for alternately withdrawing the yarn from the feed positions, and advancing the withdrawn yarn along a path of travel leading to a takeup device for forming yarn packages, a texturing device positioned along the yarn path of travel for imparting crimp to the advancing withdrawn yarn, a sensor for detecting and signaling the transfer of the yarn from the feed yarn package to the reserve package, and a controller for causing a change in the texturing device and/or a change of the feed yarn package responsive to a signal from the sensor.
Specification