Apparatus for the production of non-woven material from endless filaments
US4964197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Apr 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S239/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
To produce non-woven materials, endless filaments in the form of a warp are drawn off a filament draw-off nozzle to which are joined a filament offlet, a filament guide tube and a spreading extruder. An amount of compressed air under high pressure is admitted to the filament draw-off nozzle. By means of the invention the amount of compressed air at the filament draw-off nozzle is reduced and at the same time an additional amount of compressed air under relatively low pressure is admitted between the filament guide tube and the spreading extruder by means of a propelling nozzle. In spite of an additional amount of compressed air at the propelling nozzle the reduction at the filament draw-off nozzle is so large that for the isothermal compression output as a whole a considerable savings in energy of almost 30% can be achieved, and this while maintaining the important filament draw-off force necessary for the drawing of the filaments inside the filament offlet. In addition, the additional compressed air also permits an improved, more even distribution (spreading) of the warp at the exit of the spreading extruder, whereby the quality of the non-woven material is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.