Flexible sheet rollup window structure

摘要

A flexible sheet rollup window structure used in conjunction with a conventional window sash frame as an auxiliary or storm window. The invention includes an elongated sheet of thin, flexible plastic material (vinyl) which is designed to be supported and stored or dispensed by means of elongated spring rollers. An auxiliary guide roller is provided to direct the film into a straight-line plane. A lower end of the sheet of material is provided with a structurally rigid edge lockable structure, with the support roller and guide roller being mounted at the upper end. A horizontal sealing element is secured to a surface of the film and is automatically brought into sealing engagement with the upper end of the window frame when the sheet is placed in a closed position with respect to the window frame. Additional sealing of the sheet of material is effected by longitudinally extending, vinyl sealing strips or ribs that are dielectrically welded to one surface of the sheet adjacent each longitudinal edge thereof. The marginal edge portions of the vinyl sheet are provided with at least two parallel spaced apart sealing ribs.