provided with shed retaining elements which determine the upper shed position or lower shed position respectively of the warp threads k by means of the shed retaining elements the warp threads are retained over the entire wrap angle at the weaving rotor in their upper shed position or in their lower shed position as the case may be fig2 shows the individual lamellae or small plate members 4 5 illustrated exaggerated in thickness the so called tube formed between two adjacent guide lamellae 5 is designated by reference character b and the tube formed between two adjacent beat up lamellae 4 is designated by reference character c it will be seen that both of the lamellae combs 2 and 3 see fig1 containing the lamellae 4 and 5 respectively are mutually offset or shifted by half a tube width according to the illustration two warp threads k are present in each tube of each of the two lamellae combs 2 3 thus it will be seen that the two warp threads k in the tube b between two guide lamellae 5 are conjointly either in the upper shed position or in the lower shed position in the tube c between two beat up lamellae 4 one of the two warp threads k is in the upper shed position while the other one is in the lower shed position such representation corresponds to double stitch linen weaves the shed retaining elements for the warp threads k are formed by laterally protruding projections or extensions provided at the guide lamellae 5 each guide lamella.