Means for preventing fogging of optical aids used by the wearer

Details Means for preventing fogging of optical aids used by the wearer Means for preventing fogging of optical aids used by the wearer

1974-07-08

1976-08-17

Michell, Robert W.

Surgery

Truss

Pad

128139, A61M 1600

Patent

active

039748294

ABSTRACT:
A surgical mask is provided with means for preventing fogging of optical aids used by the wearer. The means comprises a strip of pliable material bonded to a layer of soft foam interposed between the upper edge of the mask and the wearer's face. An air impervious film sheathes the layer of foam and extends laterally therefrom a sufficient distance to cover an upper portion of the mask in the area below the wearer's eyes. The interposed material shapes itself and sufficiently extends over the wearer's face to form a seal and a moisture barrier preventing fluid vapor in the wearer's breath from contacting eye glasses or other optical instruments worn by the wearer and susceptible to fogging.

REFERENCES:
patent: 3316903 (1967-05-01), Richards
patent: 3664335 (1972-05-01), Boucher
patent: 3721238 (1973-03-01), Wise et al.
patent: 3782377 (1974-01-01), Rychlik
patent: 3834384 (1974-09-01), Raines
patent: 3888246 (1975-06-01), Lauer

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