Method for threading a pick insertion device on weaving machines, and a device which uses this method

A method for threading a weft insertion device on a weaving machine of the type including a sley, said weft insertion device including at least one first nozzle mounted beside the sley and at least one second nozzle arranged to move with the sley, said method comprising:

• maintaining the first nozzle a distance from the second nozzle during normal operation of the weaving machine and/oriented relative to the second nozzle such that threading the first and second nozzles from a single weft supply by blowing the weft thread from a thread exit opening of the first nozzle into a thread induction opening of the second nozzle is normally uncertain, upon occurrence of an unthreaded condition of the nozzles, moving the sley to a pre-determined stopped position, operating the weaving to cause machine thread exit opening of the first nozzle to be presented to said respective thread induction opening of the second nozzle by moving the nozles relative to each other, and, while the weaving machine is stopped, leading a weft thread to be threaded through both nozzles by first presenting the weft thread to the thread induction opening of the first nozzle and generating an airflow through at least one of said first and second nozzles.