Weft thread shuttle for travelling wave shedding looms

A weft thread shuttle for travelling-wave shedding looms movable in a shed of the loom along a beating-up mechanism thereof comprising:

• a body of a trapezoidal cross-section having top and bottom sides, a rear wall and side walls;
• one of said side wall facing said beating-up mechanism and having leading and trailing surface portions with respect to the direction of movement of the weft thread shuttle;
• a bevel tip of said body smoothly conjugated with said side wall of the body facing said beating-up mechanism, the distance between said side wall facing said beating-up mechanism and said beating-up mechanism gradually decreasing from said bevel tip towards said rear wall and assuming the smallest value at an intermediate portion thereof in the region of said trailing surface portion;
• a cavity in the body on the top side thereof;
• a spool with a weft stock mounted in said cavity of the body;
• means for tensioning the weft thread paid-off from said spool during its laying-in in said shed in face of the beating-up mechanism, said means being accommodated adjacent to the rear wall of the body and spaced apart from said beating-up mechanism at a distance not exceeding the spacing therefrom of said tip of the body;
• said leading and trailing surface portions of said side wall facing said beating-up mechanism being respectively arranged at greater and smaller acute angles with respect to an imaginary line extending in parallel with the direction of the shuttle in the shed and said side wall hving a height gradually increasing from said tip towards the rear of the body and having a maximum height at said intermediate portion.