Patent ID: 6722366
Filing Date: 2004-04-20
Classification: A41D,A62B

Abstract:
A method of making a personal respiratory protection device, which method comprises:forming a multi-layered structure that comprises a first cover web, a filtration layer that comprises a web that contains electrically-charged microfibers, and a second cover web, wherein the first and second cover webs are disposed on first and second opposing sides of the filtration layer, respectively, where at least one of the cover webs comprises spunbond fibers; adapting the multi-layered structure into a first panel, a central panel, and a second panel such that the central panel is separated from each of the first and second panels by first and second lines of demarcation, and each of the first, second, and central panels is non-pleated, the adapted multi-layered structure forming a respiratory protection device that is capable of being folded at the respective lines of demarcation so that the device can be folded flat for storage and can be opened to form a cup-shaped air chamber over the nose and mouth of the wearer when in use.