초록 ▼

A conformal seal carried on a face mask is disclosed herein which is mounted about the edge marginal peripheral region of a rigid shell intended to be placed over the nose and mouth areas of a user. The seal includes an endless toroid made with a pliable membrane preferably filled with a deformable

A conformal seal carried on a face mask is disclosed herein which is mounted about the edge marginal peripheral region of a rigid shell intended to be placed over the nose and mouth areas of a user. The seal includes an endless toroid made with a pliable membrane preferably filled with a deformable filler material so, that upon donning the mask, the seal causes the filler material volume to become smaller in cross section so that its peripheral length is shorter or reduced in cross section as compared with the peripheral length of the toroidal membrane. Thus, the slack membrane allows the filler material to conform to and seal with any irregular face against which it is applied.

대표청구항 ▼

A face mask sealing device for sealing against an irregular facial surface of the user to prevent passage of of vapors or gas therebetween, the combination comprising: a hollow mask having an edge marginal portion adapted to cover the irregular facial area; sealing means carried on said mask edge ma

A face mask sealing device for sealing against an irregular facial surface of the user to prevent passage of of vapors or gas therebetween, the combination comprising: a hollow mask having an edge marginal portion adapted to cover the irregular facial area; sealing means carried on said mask edge marginal portion separating said edge marginal region from the facial area; and said sealing means having a closed, thin film, toroidal, distortable membrane having a smooth and regular external surface and enclosing a continuous, pliable and deformable filler material adapted under pressure to forcibly urge a porton of said thin film membrane to occupy adjacent surface irregularities of the facial area.