Fibrous filtration face mask

Details Fibrous filtration face mask Fibrous filtration face mask

2006-11-07

2006-11-07

Lewis, Aaron J. (Department: 3743)

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

C128S205290, C128S206120, C128S206190, C128S206210

Reexamination Certificate

active

07131442

ABSTRACT:
A face mask for filtering contaminants from the air. The face mask includes a harness for securing the mask over the nose and mouth of the wearer and a nonwoven fibrous layer attached to the harness. The nonwoven fibrous layer contains at least 40 weight percent thermally bonding fibers, where at least 10 weight percent of the fibers in the nonwoven fibrous layer are bicomponent fibers. The nonwoven fibrous layer is molded in a cup-shaped configuration and has a surface fuzz value of not less than 7.5 after being subjected to a surface fuzz abrasion test.

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Beauchamp, M., “His Cups Runneth Over”, 139 Forbes 105 (Apr. 20, 1987).

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