High efficiency respirator

Details High efficiency respirator High efficiency respirator

1987-03-02

1989-05-09

Coven, Edward M.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

12820616, 12820619, 12820621, A62B 710

Patent

active

048279242

ABSTRACT:
The invention provides a filtration face mask which has an expanded filtration surface area and high filter efficiency. The mask includes at least two sidewall portions generally extending away from the face of the wearer and away from an annular base. A frontal portion bridges the sidewall portions and at least two supporting arche structures are disposed at the junction of the sidewall and frontal portions.

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patent: 4641645 (1987-02-01), Tayebi
patent: 4643182 (1987-02-01), Klein
patent: 4684570 (1987-08-01), Maloney

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