Accordion-pleated filter material and filter element incorporating same
US6726751B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Nov 13, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2275/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter material includes a filter pad made from a thin, nonwoven fiber mat which has been accordion-pleated, compressed into a unit having a large number of substantially parallel interconnected filter strips, and treated to retain the filter strips in substantially parallel relation to each other. In a preferred embodiment, activated carbon particles are operatively associated with the filter pad. Selected fibers of the nonwoven fiber material are hollow fibers, each having an outer surface, a hollow internal cavity, and an extended slot formed therein, between the hollow internal cavity and the outer fiber surface. Carbon particles may be located between selected filter strips, and additional carbon particles may be disposed within the cavities of the hollow fibers. Methods of forming the filter material, and a filter element made with the filter material are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.