weft insertion and the selvage of desirable quality is formed during weaving the time at which severing occurs is adjustable by altering the angular relationship of the cam 50 with respect to the loom frame if the width of cloth is to be changed bracket 20 and bracket 32 may be adjusted to suitable positions in accordance with the desired width by loosening the fastening member 21 and clamp member 33 the position of the cam 50 being correspondingly changed another preferred embodiment is described hereinafter in connection with fig6 and 7 filament yarns for instance of acetate or rayon have a property that they are liable to break on slight contact with the sharp edge of any solid material not necessarily of a blade of cutting expedient since in this invention a fixed blade is secured directly to the reed the filament yarns may eventually contact the fixed blade resulting in abnormal breaking of the weft yarns the embodiment shown in fig6 and 7 proposes a cutter with a thread protecting element to avoid this undesirable effect as shown the inverted l profiled thread protector 60 preferably made of wood has a longer leg 60a located along the rear face of the reed and.