Abstract: A screen device includes a pair of parallel side frames, a take-up shaft mounted between ends of the side frames, and a screen wound around the take-up shaft and having a bar secured to its free end. The side frames have guide grooves formed in their opposing sides. The bar has both ends thereof received in the grooves in the side frames. Wires having their leading ends connected to the bar are taken up by a wire take-up drum. A constant force spring urges the wire take-up drum to rotate in such a direction that each wire is wound around the wire take-up drum, thereby applying tension to the screen.

Abstract: A window screen is proposed which comprises a frame, a casing, a roller mounted in the casing, a cover sheet wound around the roller and having strips attached to its opposite side edges and held in position by rails mounted in a pair of vertical stiles. The rails are loosely mounted and urged by cushioning members toward the stiles.