| 摘要 |
The invention provides a dust mask comprising a sheet of filter material centrally folded in the horizontal direction to form a pocket comprising upper and lower opposed faces (14) (16), a horizontal pleat (18) essentially central to said opposed faces and at least one additional horizontal pleat (20) (22) in each of said opposed faces, a deformable strip (28) extending at least partially across the upper opposed face (14) and capable of conforming to the nasal contour of the wearer; and attachment means (32) for releasably securing the mask upon the face of the wearer. <IMAGE> |
