Inventors:
Elvin L. Boyce - Salt Lake City UT
William Keith Robinson - Salt Lake City UT
Assignee:
Tape-Licator, Inc. - Riverton UT
International Classification:
A62B 2302
Abstract:
An improved filter mask having a laterally pleated filter medium and a stiffening member parallel to and in the vicinity of the pleats. Lateral opening of the pleats causes the stiffening members to bow outwardly and support the filter medium away from the nose and mouth of the wearer thereby providing greater filtering efficiency and wearer comfort.