Method and apparatus for making fibers from thermoplastic materials

Abstract From the Canadian patent

Method and equipment are disclosed for forming fibers from attenuable material such as molten glass, by the use of high velocity whirling gas currents or tornadoes. Attenuation is preferably effected in two stages, the first of which utilizes a pair of high velocity whirling currents or tornadoes formed by delivering a gaseous jet through a jet guiding device of trough-like form which is concavely curved, thereby developing a pair of counter-rotating tornadoes, with a zone of laminar flow therebetween, a stream of the attenuable material being delivered to the jet in the zone of laminar flow. A larger gaseous blast is also utilized being directed in a path intercepting the path of the jet …