Abstract: A loom is provided with a weft inserting nozzle for picking a weft yarn under the influence of fluid jet and equipped with a weft picking control system which consists of a device for detecting the tension of the picked weft yarn at a timing of termination of travel of the weft yarn in weft picking. The thus detected weft yarn tension is compared with a standard tension by a comparing device forming part of a control circuit thereby to obtain the difference therebetween. The pressure of air to be supplied to the weft inserting nozzle is controlled in accordance with the difference in tension, thus maintaining the weft yarn tension at a constant value.

Abstract: An air jet loom is equipped with a weft inserting nozzle through which a weft yarn is picked under a traction force of an air jet ejected therefrom. The loom is provided with a weft picking system which is so controlled as to accomplish a weft picking under the traction force at a first level during normal loom operation while increasing the traction force to a second level not lower than the first level for a predetermined time at starting of the loom, thereby preventing shortpick at the loom starting.