Patent ID: 6297905
Filing Date: 2001-10-02
Classification: G03B

Abstract:
A portable screen assembly comprising:an upper and a lower casing:a spring-biased roll rotatably mounted on the lower casing;a screen having first and second ends opposite to each other and wound around the spring-biased roll at a rest position;a top bar secured to the first end of the screen;a pantograph type expansion means for biasing the top bar upwards, the expansion means having an upper end that is rotatably connected to the top bar only at an intermediate portion thereof, and a lower end that is connected to an intermediate portion of the lower casing, wherein the top bar is capable of rotational movement in a plane that is substantially perpendicular to a surface of the screen; anda height retaining means engaged with a portion of the expansion means so as to maintain the screen at a desired height.