along the shed tunnel at the same rate as the carriers as can particularly be seen in fig2 in other words and with particular reference to fig7 through 9 19 and 20 as the two carriers on opposite sides of each tunnel move therealong the upper reed cam wheels 43 contact cam contacting edges 22 and 25 of members 18 and 19 respectively thereby forcing members 18 and 19 away from each other thereafter the lower reed cam wheels 43 contact the cam contacting edges 23 and 24 of members 18 and 19 respectively thereby forcing members 18 and 19 inwardly toward each other this results in projections 27 contacting the pulling wheels 47 of the respective inserter and moving the inserter along the tunnel along with the respective carriers in order to describe in detail the manner in which the cam carriers are moved thus causing the transversal cyclic displacement of the healds and the advance of the inserters reference will be made to fig2 15 16 20 21 and 22 which illustrate the chains which move the carriers the pinions activating the chains and the means for allowing the chains to be separated within the tunnels and to be.