contactor 54 of the relay 53 is incorporated into a circuit which generates a signal to inhibit the restart of the loom or a signal to interrupt the weft removing operation fig7 shows a series of sequential actions of the weft removing device 1 in the normal picking operation the picking nozzle 5 pulls out wefts 56 from a measuring and storing device and picks the wefts 56 successively into sheds of warps 57 upon the occurrence of a mispick a weft stop motion unit provides an h level logic 34 1 34 signal namely a weft stop signal to actuate a brake so that the loom is stopped automatically in the next weaving cycle a mispick is detected by a well known yarn sensor or the like positioned at the edge of the cloth on the arriving side where the picked weft 56 arrives upon the reception of the weft stop signal the measuring and storing device not shown releases the weft 56 so that the weft 56 of an appropriate length can be supplied to the picking nozzle 5 this appropriate length is such a length necessary for extending the weft 56 at least from the picking nozzle 5 to the guide hole 37 of the winding device 4 the free weft 56 of such an appropriate length can be obtained when the measuring and storing device is of a drum type by retracting the retaining pin to unwind for example one.