Mask and method of manufacture
US4951664A · kind A · utility
56Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 9, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/025
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A mask for filtering dust and other particulates from air to be breathed by a person and a process for making same. The mask includes a compressible strip covered partially by a sealing material around the entire contact path between the mask and the person's face. The compressible strip provides for changes in the configuration of the face, while the impermeable material maintains a seal during all such changes. Another embodiment includes a support for said compressible strip either in the form of a semi-rigid frame member behind said strip or a plurality of inwardly cantilevered bendable finger members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.