| 摘要 |
A disposable face mask is made up of molded fibrous sheet material which is formed to define a generally cup-shaped main body having two spaced, generally parallel, integral, interior nose portions filter-seals which are strategically located to engage opposed sides of the nose of the wearer. The mask body also desirably has an elongated, integral interior chin portion filter-seal which is positioned to engage the face underneath the wearer's chin. The nose and chin filter-seals cooperate to prevent passage of contaminated air beneath the peripheral edge of the mask and the user's face. The elongated nose filter-seals are especially effective in preventing passage of contaminated air along paths of travel which extend from the nose bridge encompassing part of the mask to the user's nostrils of mouth. The same is true of the chin filter-seal. The nose and chin portions preferably interconnect to form a continuous filter-seal around the periphery of the mask. In one embodiment, a groove comprised of crushed fibrous material delineates the elongated nose filter-seals from the remaining interior surface areas of the mask and assists in maintaining the generally cup shape of the mask.
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