Composite air-filtering material
US5198294A · kind A · utility
23Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/682
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air-filtering material exchangeably attached to a home-use or automobile air filter comprises a water jet type nonwoven fabric at an air outlet side and another type nonwoven fabric or fiber assembly at an air inlet side. These nonwoven fabric sheets are laminated on one another by needle punching. The water jet type nonwoven fabric is made from crowded finer fiber staples, and bits formed therein by penetration of needles of a needle punching machine may be stopped up by centripetally moving fiber staples surrounding the bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.