the right in a separating stroke so that the thread 14a is spatially separated from the successive threads 14b 14c etc due to this spatial separation the thread 14a can then be gripped by grippers and after release by the hooks 20 26 it can be introduced by the grippers into the shed of the seam weaving machine in fig4 b the frame 10 has been moved back the length of the separating stroke moreover the slide on which the seam weaving machine is arranged together with the lifting means for the shed formation the grippers and the drive members for the needles 16 18 has been moved ahead in line with the rhythm of the weaving operation namely by the center distance between two threads 14 so that now the next thread 14b assumes the deepest position in the gap 12 and can be seized by the upper hook 20 of the first needle 16 and the lower hook 26 of the second needle 18 the thread 14b is separated again from the next following threads 14c 14d etc by the separating stroke is picked up by the grippers is released by the hooks 20 26 and is inserted into the shed by the grippers the frame 10 is then moved back into its initial position by the length of the separating stroke next the thread 14c is seized fig4 c since in vertical projection the thread 14c is somewhat overlapped by the thread 14d it is positively engaged by the lower hook 22 of the first needle 16 and the upper hook 24 of the second needle 18 if the thread 14c were seized by the upper hook 20 of the first needle 16 and by.