Method of perforating a texture to be sewn
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United States of America Patent
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Jun 9, 1987
Grant Date -
N/A
app pub date -
Dec 20, 1985
filing date -
Dec 27, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for perforating materials with a metal needle whereby the method involves the utilization of an ultrasonic vibration signal being applied to the metal needle in order to vibrate the needle in an axial direction to thereby penetrate a plurality of layered materials due to the axial vibration of the metal needle.
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