Filter mask

Details Filter mask Filter mask

1974-12-13

1976-10-12

Kamm, William E.

Surgery

Truss

Pad

A62B 2302

Patent

active

039851320

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.

REFERENCES:
patent: 3170461 (1965-02-01), Watts, Jr.
patent: 3802429 (1974-04-01), Bird
patent: 3884227 (1975-05-01), Lutz et al.

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