Flat-folded personal respiratory protection devices and processes for preparing same
US6394090B1 · kind B1 · utility
89Cited by
41References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA41D13/113
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Respiratory devices having first and second lines of demarcation bisected by a fold. The devices are capable of being folded in a first substantially flat configuration for storage (e.g., in a pocket) and are capable of being unfolded in a second ready-to-wear configuration so that a portion of the device covering the nose and the mouth is off-the-face. Processes for making such devices include folding a preform over a bisecting axis and cutting the preform at desired angles and sealing the cuts together to form the mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.