Flat-folded personal respiratory protection devices and processes for preparing same
US8375950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2006 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jul 14, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA41D13/1115
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A personal respiratory protection device that comprises a multilayer body including a stiffening layer, filter media layer(s) and inner or outer cover layer(s). The mask body includes a central portion between first and second portions, the central portion being defined by a fold, bond, weld, seam, or combination thereof and having a width of about 160 to 220 mm and a height of about 30 to 110 mm. The device is capable of being folded flat for storage with the first portion in at least partial face-to-face contact with a surface of the central portion and the second portion contacting a surface of the first portion. When unfolded for use the device is capable of forming a cup-shaped off the face air chamber over the nose and mouth of a wearer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.