Filter unit
US7344580B2 · kind B2 · utility
1Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2002 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 13, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Converting machines give rise to polluted air which must be removed with the aid of fans and filters. The invention aims at removal of the polluted air in such a way that the servicing interval is greatly extended by the use of a filter unit having a number of part-filters arranged one after the other and formed of pleated fiber mats, the various mats having different filtering properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.