CPC A62B 23/025 (2013.01) [A41D 13/1115 (2013.01); A41D 13/1161 (2013.01); A62B 18/025 (2013.01); A62B 18/08 (2013.01); A41D 2400/42 (2013.01)] | 16 Claims |
1. A filter mask comprising: a filter material having an inner surface to be worn against a wearer's face, and an outer surface, the filter material comprising at least one pleat for folding and unfolding the filter material such that when folded the filter material assumes a flat storage configuration having upper, lower and side edges; a first malleable stiffening member within the filter material along the upper edge for conforming to the wearer's nose; a second malleable stiffening member within the filter material along the lower edge such that the second malleable stiffening member is located between a bottommost pleat of the at least one pleat and the lower edge, and the second malleable stiffening member having a non-conforming portion configured to be creased to form a projection pointing away from the wearer's face and under a chin of the wearer, wherein the second malleable stiffening member has a first conforming portion adjacent to a first creased end of the non-conforming portion, and a second conforming portion adjacent to a second creased end of the non-conforming portion such that the non-conforming portion is disposed between the first conforming portion and the second conforming portion, the first conforming portion and the second conforming portion configured to conform to the wearer's face, wherein the non-conforming portion comprises a peak such that the first creased end, the second creased end and the peak together form the projection having an acute angle; and a means for securing the filter material to the wearer's face; wherein longitudinal sides of the projection are configured to extend transversely to the chin when the mask is worn.
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