Fluted filter medium and process for its manufacture
US7997425B2 · kind B2 · utility
82Cited by
64References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluted filter medium (74) comprising a corrugated filter sheet, where each flute (120) has an end closure defined by a regular fold arrangement in the corresponding corrugation. Each regular fold arrangement has at least four folds. A process for manufacturing the fluted filter medium comprising deforming a portion of each corrugation to define at least one foldable tip, and folding the said tip in order to close the corrugation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.