Patent ID: 8950346
Filing Date: 2015-02-10
Classification: B65D,D05B

Abstract:
1. Method for production of bags for the transport and storage of bulk goods comprising the steps of providing fabric, cutting the fabric into several pieces and assembling them one to another, wherein the step of assembling comprises the steps of providing a sewing machine equipped with at least two needles, feeding each needle with a thread and operating said needles in-line one behind the other in one and the same direction so as to produce a seam along a single line through the thicknesses of the pieces of fabric with a stitch formed by the second needle being made on the thread of a stitch formed by the first needle, the stitch formed by the second needle covering a perforation produced by the first needle, and a perforation produced by the second needle being thus made through the thread, thereby filling the perforation with the thread.