Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1986-04-07
1989-02-28
Howell, Kyle L.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820619, A62B 710
Patent
active
048076198
ABSTRACT:
New molded fibrous filtration face masks that are highly resilient and shape-retaining are provided using one or more molded fibrous shaping layers, with a fibrous filtration layer disposed on one side of or between the molded fibrous shaping layers; the molded fibrous shaping layers having a total basis weight of at least 150 g/m2, and at least one of the fibrous shaping layers having an average density over the central area of the face mask of no greater than about 0.2 g/cc, such that at bends of the layer during deformation of the face mask the layer elastically deforms and tends to return to its original thickness and shape when the deforming pressure is removed.
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Berg Harvey J.
Dyrud James F.
Murray Alice C.
Howell Kyle L.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Sykes Angela D.
Tamte Roger R.
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