Filter medium for air filter and filter unit
US9242201B2 · kind B2 · utility
7Cited by
0References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2012 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Oct 9, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/724
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter medium for an air filter collecting dust in an air flow has a principal collection layer including a porous polytetrafluoroethylene film. A surface of the filter medium is provided with a plurality of embossed projections. Preferably, a processed filter medium maintains a zigzag shape by pleating an unprocessed filter medium to create mountain folds and valley folds. Preferably, an air filter unit includes such a processed filter medium and a frame body holding the processed filter medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.