In a apparatus of making a nonwoven mat wherein a multiplicity of filaments are extruded in a row and a pair of jets of compressed gas are played symmetrically from nozzles upon the filaments as same are extruded to stretch the filaments and deposit same on a substrate the compressed gas is made to flow...http://www.google.com.au/patents/US5248247?utm_source=gb-gplus-sharePatent US5248247 - Apparatus for blow-extruding filaments for making a fleece
