JPS5685409A - Method of measuring uneveness in man-made fiber yarn - Google Patents
Method of measuring uneveness in man-made fiber yarnInfo
- Publication number
- JPS5685409A JPS5685409A JP15947579A JP15947579A JPS5685409A JP S5685409 A JPS5685409 A JP S5685409A JP 15947579 A JP15947579 A JP 15947579A JP 15947579 A JP15947579 A JP 15947579A JP S5685409 A JPS5685409 A JP S5685409A
- Authority
- JP
- Japan
- Prior art keywords
- yarn
- speed
- uneveness
- measured
- fluctuation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
PURPOSE: When a yarn is made from a molten substance, the fluctuation in the yarn speed is measured by the use of a frequency modulation type noncontacting speed detector to detect the yarn uneveness with high accuracy.
CONSTITUTION: The feed of a molten substance is controlled with metering pump 1 and the substance is spun from spinneret 2 and wound up to revolving drum 3 wherein the fluctuation in yarn speed is measured with speed sensor 5, which is a frequency modulation type noncontacting speed detector to obtain signals of the yarn uneveness of the man-made fiber. At the same time, preferably, the fluctuation in the thoroughput of the molten substance is measured with throughput sensor 4. These signals are processed in yarn-speed detecting circuit 6 and signal processing circuit 7 and the yarn uneveness is continuously detected. The speed sensor 5 is a Doppler type in which the yarn speed is measured without contact with the yarn utilizing the heterodyne effect between original frequency f0 and modified frequency (f) which has undergone Doppler shift caused by the yarn speed V.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15947579A JPS5685409A (en) | 1979-12-07 | 1979-12-07 | Method of measuring uneveness in man-made fiber yarn |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15947579A JPS5685409A (en) | 1979-12-07 | 1979-12-07 | Method of measuring uneveness in man-made fiber yarn |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5685409A true JPS5685409A (en) | 1981-07-11 |
Family
ID=15694576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15947579A Pending JPS5685409A (en) | 1979-12-07 | 1979-12-07 | Method of measuring uneveness in man-made fiber yarn |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5685409A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007003377A1 (en) * | 2005-07-05 | 2007-01-11 | Oerlikon Textile Gmbh & Co. Kg | Device for producing a spun-bonded non-woven |
JP2009085955A (en) * | 2007-09-28 | 2009-04-23 | Gebr Loepfe Ag | Method and instrument for measuring velocity of yarn |
-
1979
- 1979-12-07 JP JP15947579A patent/JPS5685409A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007003377A1 (en) * | 2005-07-05 | 2007-01-11 | Oerlikon Textile Gmbh & Co. Kg | Device for producing a spun-bonded non-woven |
JP2009085955A (en) * | 2007-09-28 | 2009-04-23 | Gebr Loepfe Ag | Method and instrument for measuring velocity of yarn |
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