includes a first clamping element 39 which has been fixed to a support 40 and a second clamping element 41 which has been attached to this support 40 in a rotatable manner and which can be moved by means of a drive cylinder 42 the support 40 can be moved up and down by means of the drive element 38 for example along the guide pieces 43 the blowing nozzles 25 and 34 can preferably also be moved vertically together with the support 40 such that they can take two positions as shown fig6 and 8 respectively whereby the ends of these blowing nozzles 25 and 34 are in the highest position at a short distance under the warp to this end the blowing nozzles 25 and 34 are for example telescopic according to fig7 these telescopic blowing nozzles 25 and 34 are connected to the support 40 via a pin 44 which engages and is guided by a circle shaped guide piece 45 which fastened to the blowing nozzles 25 and 34 the above mentioned mechanism 28 to rotate a dropped drop wire 2a includes a rotating table 46 which has been mounted on the element 33 and which can be turned to and fro by means of a drive as shown in fig6 this drive may includes a gear rack 48 which can be moved by means of drive cylinder 47 and which works in conjunction with a.