PROCESS AND APPARATUS FOR PREPARING A SEAM

PCT No. PCT/EP89/00473 Sec. 371 Date Jan. 3, 1991 Sec. 102(e) Date Jan. 3, 1991 PCT Filed Apr. 28, 1989 PCT Pub. No. WO89/12130 PCT Pub. Date Dec. 14, 1989.A processing and sewing machine arrangement for preparing a seam which is uninterrupted on a seam side facing the needle of the sewing machine. The arrangement includes a shuttle thread disturbance detection arrangement and a control arrangement activating a stopping arrangement for stopping the sewing machine after the shuttle thread disturbance has been detected and after a stitch formation cycle which has been begun is completed. A regulating mechanism for setting stitch length is set into a reverse stitching mode by the control arrangement while the fabric being sewn is moved backward by one stitch length. After the shuttle thread has been fed in, thread is knotted by at least one stitch with the needle thread in the same insertion hole in which the old shuttle thread is located such that the old shuttle thread is correctly knotted with the needle thread.