DISPOSABLE FACE RESPIRATOR

A respirator mask is formed by a filter medium that comprises a majority of the face portion of the mask and edge sealing means. The filter medium includes at least two layers of interfelted fibers: (a) a backing layer of fibers, and a binder, and (b) a filter layer including fibers having a fine di...

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Bibliographische Detailangaben
Hauptverfasser:	REIMSCHUSSEL G,US, WEEKS T,US
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HUMAN NECESSITIES OUTERWEAR PROTECTIVE GARMENTS TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS WEARING APPAREL
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Beschreibung
Zusammenfassung:	A respirator mask is formed by a filter medium that comprises a majority of the face portion of the mask and edge sealing means. The filter medium includes at least two layers of interfelted fibers: (a) a backing layer of fibers, and a binder, and (b) a filter layer including fibers having a fine diameter. The filter medium is formed by sequentially depositing solids on a foraminous mold having the desired shape of the interior of the mask, from separate aqueous slurries. A pressure differential is applied across the foraminous mold to cause the fluid portion of each slurry to pass through the mold and to deposit solids on the mold.