Patent ID: 9603395
Date: 2017-03-28
CPC Classifications: A41D,A62B,Y10T

Claim:
1. A filtering face-piece respirator that comprises: (a) a harness; and (b) a mask body comprising a filtering structure and having a first side edge on a first side of the mask body, a second opposite side edge on a second side of the mask body, and a perimeter, the filtering structure folded into a three-layer pleat at the side edges and sealed to itself at a location on the first side of the mask body distanced from the perimeter to create a transversely extending dart, wherein the mask body further comprises an unsealed length of pleat between the sealed location and the first side edge, and wherein the mask body further comprises first and second flanges located at the first and second opposing sides, the first and second flanges each being folded inwardly to contact the filtering structure when the mask body is in an in-use configuration, wherein the transversely extending dart extends from the first flange to the second flange.