| 摘要 |
FIELD: individual devices for protecting respiratory organs. SUBSTANCE: respirator has baffle plate, head band, nose clip and filtering half-mask composed of two symmetrical parts sealed along joint. Half-mask has filtering member and outer enclosure. Each part of half-mask is formed as shaped blank defined by curved outer edge, with curvature radius equal to 1.8-2.2 of half-mask depth, and by sealing line adjacent to nose region with smooth transition portion connecting outer edge with arc having radius equal to 1.8-4.2 of half-mask depth. Continuation portion extends to part intersecting with outer edge arc of half-mask. Radius centers of arcs defining outlines of half-mask are positioned on transverse axis of half-mask. EFFECT: wider operational capabilities, increased efficiency and enhanced reliability in operation. |
