Method of and apparatus for threading the weft thread carriers in travelling-wave looms

摘要

The present invention relates to methods of and apparatus for threading the weft thread carriers and may be most effectively used on travelling-wave looms. In this method, the weft thread is introduced into a thread tensioner while the last coil thereof is being wound with gripping before a straight section is formed, after which the thread is shifted by being unwound from a bobbin in the direction of feed, with the carrier admitted into the looming-up zone at this time, this shifting being maintained up to the moment of separation of the straight section from the coils. In an apparatus for realizing this method, there is provided a stationary cam for jaws located in a central angle of a disk within a sector limited by a region of divergence of mechanical trajectories of the disk and a conveyer and a region corresponding to the last turn of the threadguide around its axis which is close to the axis of rotation of the disk and shifted relative to the axis of symmetry of the carrier spool.