| 摘要 |
A louvre blade formed as an extrusion is described. The louvre blade includes front and rear curved faces joined at their ends to form an interior cavity and a support web located in the interior cavity between the front and rear faces and extending longitudinally along the louvre blade that defines a pivot axis. The support web also includes mounting means located on at least one end of the louvre blade to mount the louvre blade to be pivoted about the pivot axis. The mounting means has a bore extending longitudinally along the support web including a screw thread to receive a grub screw 240. This allows for a spring 241 and pin member 245 to be inserted at one, and typically each, end of the blade before end cap 250 is fastened to the louvre blade by screws 252 engaging part-circular grooves in the louvre blade which is typically extruded.
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