IMPROVED SCREENING DEVICE AND SYSTEM

摘要

An exterior self supporting louvre blade 1 adapted for fixed fitting to the exterior of a window, said blade comprising an elongate generally angle shaped panel, said angle shape being formed of an upper face 2 juxtaposed to a lower face 3 such that said angle shape provides sufficient rigidity to provide said self-support over the length of said blade, wherein said upper face has an array of apertures of a first configuration 7 and said lower face has an array of apertures of a second configuration 8.