Patent attributes
Methods of manufacturing a mask include: providing a shell having an inlet formed on a body of the shell and a flange formed around a lower end of the body, the flange forming a surface on a bottom thereof; providing a first film substrate; providing a second film substrate; bonding the first film substrate to the second film substrate around an outer edge and around an inner edge shaped to fit around a nose and mouth of a patient; cutting the first film substrate and the second film substrate around the outer edge and the inner edge of the first film substrate and the second film substrate. The bonded and cut first film substrate and second film substrate form a first sheet that is joined to a second sheet. The shell is joined to the first sheet at the surface formed on the bottom of the flange.
