Ultrasonic cutting of fabric tufts to provide improved retention of tuft indentity during use
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United States of America Patent
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Jan 14, 1992
Grant Date -
N/A
app pub date -
Dec 28, 1990
filing date -
Dec 28, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process and apparatus for cutting tufted loops of yarn of a fabric, such as a carpet, by applying sufficient energy from an ultrasonically vibrating horn, operating with either a shearing or a pincer action in cooperation with a mechanical device, either or both having a cutting edge, to cause at least some of the filaments in said yarns to soften and fuse to adjacent filaments during cutting of said tufted loops.
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