Filter element
US5720790A · kind A · utility
121Cited by
5References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2279/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter element made of nonwoven filter fabric includes a plurality of pleated portions and a flange portion formed integrally with the filter portion. The flange portion is formed by a pair of press-forming dies to have a thin and compressed connecting portion formed along the outer periphery of the filter portion, a thick and uncompressed seal portion formed along the outer periphery of the connecting portion and a thin and compressed protecting portion formed along the outer periphery of the seal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.