Process for production of a bundle of hollow semi-permeable fibers
US4948444A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Sep 23, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/108
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process and an apparatus for the production of a bundle of filaments from at least one filament, and its application especially to the production of a bundle of hollow semi-permeable fibers used for producing a filtration module. According to this invention, the filaments (1) is wound in a first step, in several superposed layers around a support plate (10) having two take-up edges (17) perpendicular to the direction of winding of the filament, and conferring on this filament an alternating transverse movement of decreasing amplitude in such a manner as to achieve a winding having a predetermined profile. The support plate (10) is then removed by retracting the take-up edges (17) toward each other so as to obtain a bundle having a transverse section which is a function of the profile of the winding and curved ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.