Method of manufacturing a filter element
US5888442A · kind A · utility
40Cited by
3References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 17, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 17, 2017 |
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.