METHOD AND MACHINE FOR PRODUCTION OF A NON-UNRAVELLING SEAM

摘要

The invention relates to a method and a machine for production of a non-unravelling seam (12) with at least one looped and interlaced seam thread with stitching holes in or through at least one thickness of the material of an object, called the sewed object (3). The stitching (12) is produced using at least one thread having a thermoplastic material at least on the outside thereof. An infrared laser beam (17, 18) is applied locally to the stitching (12), on the outside of the sewed object (3), suitable for local softening of the thermoplastic material located on the outside of at least one thread, extending along the outside of the sewed object (3) and adjacent to at least one other thread. A jet of air permits the mixing of the softened fibres and at least one pressing body (6) is then applied to the softened and mixed thermoplastic material of at least one thread such as to locally solidify adjacent threads together.