Inflatable storm window

Claim 1

A flexible storm window apparatus for inflated support against surfaces of a window opening; said flexible storm window apparatus including the combination of: two rectangular flexible facing sheets of transparent plastic material extending in a generally spaced-apart and face-to-face relation, flexible side walls joined to the peripheral edges of said flexible rectangular facing sheets to define therewith an internal airtight space formed a thermal barrier against heat flow, some of said side walls being heat welded to at least on of said facing sheets, a plurality of discrete spacing support strips having opposed longitudinal marginal edge portions secured by heat welding to the face surfaces of said rectangular facing sheets, said spacing support strips having a gas permeable opening and extending within said internal airtight space at spaced-apart locations from some of said flexible side walls and between other of such walls to space and support said flexible facing sheets, valve means to admit a gaseous medium into said internal airtight space under a sufficient pressure for inflated support against surfaces of a window opening, and an interface seal strip extending along the outer face surfaces of said flexible side walls to prevent rupture of said side wall of the airtight space for interface sealing between said side walls and the support surfaces therefor defined by the window opening.