Filter folded in a zig-zag configuration
US5071555A · kind A · utility
46Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Jan 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/941
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter comprising a sheet of filter material folded in a zig-zag configuration. A hardenable material is dispensed in a flowable state onto the sheet. The hardenable material has a varying thickness such that upon hardening, it holds the folds of the sheet apart in a selected orientation. The hardenable material may comprise glue to also secure the folds together. An air penetrable sheet can be secured to the fold edges at one or both sides of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.