Method of making a filtering face mask that has an exhalation valve attached thereto
Assignee3M Innovative Properties Company
InventorsDesmond T. Curran, Elfed I. Williams
Life of this patent
Estimating the term…
Abstract
A method for making a filtering face mask that comprises providing a fluid-permeable multi-layered mask body comprising a structural supporting layer and a filtration layer, the multi-layered mask body being configured to fit over the nose and mouth of a person and having an aperture disposed therein; providing an exhalation valve comprising a base portion and a deformable hollow plastic extension member that extends from the base portion to a tip; inserting the tip through the aperture; and deforming the extension member so as to make an effective seal between the exhalation valve and the mask body.
Claims22
A method for making a filtering face mask comprising:
- providing a fluid-permeable multi-layered mask body comprising a structural supporting layer and a filtration layer, the multi-layered mask body being configured to fit over the nose and mouth of a person and having an aperture disposed therein;
- providing an exhalation valve comprising a base portion and a deformable hollow plastic extension member that extends from the base portion to a tip;
- inserting the tip through the aperture;
- and
- deforming the extension member so as to make an effective seal between the exhalation valve and the mask body.
Dependencies are inferred from the claim text.