Method and machine for producing a seam which is not susceptible to coming undone
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United States of America Patent
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Nov 6, 2007
Grant Date -
Dec 4, 2003
app pub date -
May 29, 2003
filing date -
May 29, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method and a machine for producing a seam which is not susceptible to coming undone, with at least one interlooped and/or interlaced stitching thread and with stitching passes in or through at least one thickness of the material of an object, called the sewn object. The seam is produced with at least one stitching thread having a thermoplastic material at least on its exterior. At least one infrared laser beam is applied locally to the seam on the exterior of the sewn object, which laser beam is adapted to soften punctually the thermoplastic material present on the exterior of at least one strand of thread extending on the exterior of the sewn object and adjacent to at least one other strand of thread.
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