Process for making a filter having a continuous density gradient
US4731135A · kind A · utility
13Cited by
8References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 4, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Mar 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter for removing dusts from fluids, which comprises fibers bonded each other with a binder and/or hot-pressed, having a fiber density of 0.01 to 0.1 at the side of inflow of fluid to be treated and a fiber density of 0.05 to 0.5 at the side of outflow of the fluid with a continuous fiber density gradient and having a uniform distribution of fiber material in direction of thickness, and a process for the production thereof. The filter is particularly useful as an air filter for automobiles or air conditioner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.