Device for weft insertion, especially on a device for laid scrim fabrics production

The invention relates to the device for weft insertion, especially on device for laid scrim fabrics production comprising means for laying of warp threads and means for guiding of warp threads through the working path to the delivery device and further to the device for bonding of the fabric, while the means for guiding of warp threads through the working path comprise at least one pair of rollers and the device for weft insertion comprises the air insertion means and it is assigned to each inlet of warp threads in between each pair of rollers (2). In the area before inlet of warp threads in between each pair of rollers (2) there is along the rollers (2) positioned a hollow body (3), in cavity of which there is performed an insertion channel (30), while the wall of the body (3) is interrupted by a longitudinal slot (31) along a whole length of the body (3) in the place against an inlet of warp threads in between the rollers (2).