Continuous production of tubular modular filter elements using nonwoven webs from thermoplastic fibers and products
US4116738A · kind A · utility
63Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Apr 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/0695
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided for the continuous production of modular tubular filter elements using nonwoven webs in cylindrical or sheet form spun from thermoplastic fibers, spinning the fibers continuously from a melt onto a rotating internal tubular core for the filter element, serving as a mandrel, and winding them up on the core to form a wound tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.