AN IMPROVED CLAMP DEVICE FOR CROSS-BAR SUPPORT OF ROOFS OF TUNNELS IN UNDERGROUND MINES

摘要

Processes for the continuous preparation of fibers of Sult-spinnable polymers a by extrusion from one or more a apinnarots of a spinning been and spinning and cooling that fibers is an sir bleat,  s teaming perpendicular to the direction if travel of that fibrin,  in a blast shaft lying as hereinbefore described, there under,  in which a cone/is placed there on to turn the air bleat in the desired direction, characterized in that the air blest is allowed to stream from a supply channel Said through the said into blast tunnel, in which this supply channel lies in the direction of that axis of the cone,  in at least as long as the axis of this cornet  and in which the base area at that supply channel is the same as that of the base or the cone.