Respirators

Details Respirators Respirators

A - Human Necessities

62

B

2/72.1

A62B 18/00 (2006.01) A41D 13/11 (2006.01) A61M 16/00 (2006.01)

Patent

CA 1178751

ABSTRACT Improvements in and relating to Respirators The present invention relates to a filtering facepiece made from flexible filtering sheet material. The facepiece is made from a flat pocket 100 of filtering sheet material having opposed side walls 105,106, a generally tapering shape with an open end 104 at the larger end and a closed end 101 at the smaller end. The edge of the pocket at the closed end is out- wardly bowed, e.g. defined by intersecting straight lines and/or curved lines, and the closed end is provided with fold lines 107 defining a surface which is folded in- wardly of the closed end of the pocket to define a generally conical inwardly extending recess 108 for rigidifying the pocket against collapse against the face of the wearer on inhalation.

380619

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