RESPIRATOR Russian patent published in 2007 - IPC A62B7/10 A41D13/11 

FIELD: individual respiratory organs protective devices.

SUBSTANCE: respirator comprises filtering half-mask made as a circle with bent edges, spacing means, elastic cord, fixing plate to secure the respirator on user's nose bridge and bands. The circle edges form seal means. Respirator additionally has multilayered filter made of nonwoven fabric, located on outer half-mask surface and thermally connected thereto. Perforation lines and slots are formed along edges of each additional filter. Additional filter layers are arranged so that the slots are mutually shifted.

EFFECT: increased time of respirator usage.

3 dwg