Method and apparatus for making fibers from thermoplastic materials
US4140509A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Sep 19, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
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 to provide a zone of interaction also characterized by a pair of counter-rotating tornadoes, the stream of attenuable material being carried by the jet into the blast thereby subjecting the material to a second stage of attenuation in said zone of interaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.