Method of making a filtering face mask that has an exhalation valve attached thereto
US7069931B2 · kind B2 · utility
19Cited by
71References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2005 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Jul 20, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2279/55
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for making a filtering face mask that comprises providing a fluid-permeable multi-layered mask body comprising a structural supporting layer and a filtration layer, the multi-layered mask body being configured to fit over the nose and mouth of a person and having an aperture disposed therein; providing an exhalation valve comprising a base portion and a deformable hollow plastic extension member that extends from the base portion to a tip; inserting the tip through the aperture; and deforming the extension member so as to make an effective seal between the exhalation valve and the mask body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.