초록 ▼

A thermally insulative covering device is provided which can be removably associated with the interior side of windows or sliding doors of a building. The device is fabricated as a frame which tautly holds four sheets of a transparent film in a manner to form three successive stagnant air spaces. A

A thermally insulative covering device is provided which can be removably associated with the interior side of windows or sliding doors of a building. The device is fabricated as a frame which tautly holds four sheets of a transparent film in a manner to form three successive stagnant air spaces. A continuous border strip of a resilient material causes the device to make a snug friction fit with a window or door and causes the space between the device and the window or door to be a fourth stagnant air space.

대표청구항 ▼

A thermally insulative covering device comprising: (a) a frame having opposed parallel horizontal side members and opposed parallel vertical side members, said side members being joined in a rectangular contour, thereby defining an interior region, each side member being comprised of a center strip

A thermally insulative covering device comprising: (a) a frame having opposed parallel horizontal side members and opposed parallel vertical side members, said side members being joined in a rectangular contour, thereby defining an interior region, each side member being comprised of a center strip and two outer strips, said strips having flat abutment surfaces and arranged in stacked configuration forming a smooth flat outer edge, (b) support braces within said interior region extending perpendicularly between said horizontal and vertical side members and comprised of center and outer strips in stacked configuration and in coplanar disposition with the corresponding strips of the side members, (c) transparent plastic sheet material attached to said frame as two outer panels and two inner panels, said panels being disposed in tautly held layered configuration to cover the entire interior region while forming three successively disposed stagnant air spaces, the outer panels being attached to the exterior abutment surfaces of the outer strips, and the inner panels being held in sandwiched relationship between the abutment surfaces of the center and outer strips of the side members and support braces, whereby the panels are maintained in separated relationship, and (d) a continuous resilient border material uniformly applied to the flat outer edge of said frame.