Method and machine for producing a seam which is not susceptible to coming undone
First Claim
1. A method 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, which receives the seam, this seam comprising at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object, in which:
- the seam is produced with at least one stitching thread having a thermoplastic material at least on the exterior of this stitching thread;
at least one laser beam is then applied locally to the seam on the exterior of at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object, wherein;
each laser beam is adapted to soften punctually the thermoplastic material present on the exterior of at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object,after the application of each laser beam and before the complete re-solidification of the softened thermoplastic material at least one pressing device is applied to the softened thermoplastic material of at least one strand of stitching thread having such thermoplastic material which is exposed to said laser beam, so as to join punctually all or some of the adjacent strands together on the exterior of the sewn object by means of said thermoplastic material, andat least one laser beam is adapted to soften the thermoplastic material without melting it, while raising it locally to a temperature equal to or above its softening temperature but below its melting point is applied.
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Accused Products
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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Citations
12 Claims
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1. A method 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, which receives the seam, this seam comprising at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object, in which:
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the seam is produced with at least one stitching thread having a thermoplastic material at least on the exterior of this stitching thread; at least one laser beam is then applied locally to the seam on the exterior of at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object, wherein; each laser beam is adapted to soften punctually the thermoplastic material present on the exterior of at least one strand of sewn stitching thread extending on the exterior of the sewn object and adjacent to at least one other strand of sewn stitching thread on the exterior of the sewn object, after the application of each laser beam and before the complete re-solidification of the softened thermoplastic material at least one pressing device is applied to the softened thermoplastic material of at least one strand of stitching thread having such thermoplastic material which is exposed to said laser beam, so as to join punctually all or some of the adjacent strands together on the exterior of the sewn object by means of said thermoplastic material, and at least one laser beam is adapted to soften the thermoplastic material without melting it, while raising it locally to a temperature equal to or above its softening temperature but below its melting point is applied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification