Abstract: A roller blind assembly is securable between horizontally spaced apart first and second support brackets. The assembly includes a roller tube, a connector for securing one end of the roller tube to the first bracket, an actuator for securing the other end of the roller tube to the second bracket, and a blind supportable by the roller tube. The roller tube includes circumferentially spaced apart first and second grooves. The blind includes a bottom rail and a blind material having a first edge securable to the first groove, and an opposed second edge securable to the second groove. The blind material has alternating first and second strips with different light transmissibility. When secured to the roller tube, the blind material defines superposed front and rear segments. The front segment extends from the first edge to the bottom rail. The rear segment extends from the second edge to the bottom rail.

Abstract: A roller blind assembly includes a blind roller, a clutch assembly that includes a bracket engagement member, and a pre-torsioned spring assembly that includes a spring. The pre-torsioned spring assembly is positioned in an interior cavity of the blind roller, and exerts a torque proportional to a preset torsion of the spring to promote rotation of the blind roller relative to the bracket engagement member. Rotation of the blind roller relative to the bracket engagement member in a first direction decreases torsion in the spring while rotation of the blind roller relative to the bracket engagement member in a second direction increases torsion in the spring. The pre-torsioned spring assembly is preferably selected from a group of at least two pre-torsioned spring assemblies, each spring assembly having a different spring preset torsion.

Abstract: A roller blind assembly includes a blind roller, a clutch assembly that includes a bracket engagement member, and a pre-torsioned spring assembly that includes a spring. The pre-torsioned spring assembly is positioned in an interior cavity of the blind roller, and exerts a torque proportional to a preset torsion of the spring to promote rotation of the blind roller relative to the bracket engagement member. Rotation of the blind roller relative to the bracket engagement member in a first direction decreases torsion in the spring while rotation of the blind roller relative to the bracket engagement member in a second direction increases torsion in the spring. The pre-torsioned spring assembly is preferably selected from a group of at least two pre-torsioned spring assemblies, each spring assembly having a different spring preset torsion.