Slats for a sun protection blind

A roller shutter (1) comprising:

• a plurality of roller shutter laths (3) each made from a rolled and formed one piece sheet material;
• said laths (3) each comprising a slat (5) extending the length of the roller shutter lath (3), said slat (5) being curved at a lengthwise edge thereof to form a channel (6) and a hook arrangement;
• a plurality of light/air slots (22) arranged in the slat (5), said light/air slots (22) being arranged adjacent each other in the lengthwise direction of the roller shutter lath (3), said light/air slots (22) having a height corresponding to 40% to 80% of the height of the slat (5) such that in the suspended state of the roller shutter (1) the proportion of surface area of the light/air slots (22) amounts to about 20% to 30% of the total surface area of the roller shutter (1);
• a lath body (4) having a top side (13) from which the slat (5) emerges and extends, said channel (6) being arranged a distance from the lath body (4) such that the height of the slat (5) measured between the channel (6) and the top side of the lath body (4) is more than 30% of the height of the lath body (4);
• said lath body (4) having an underside (10) and defining an interengagement slot (7) extending along the length of the lath (3), said interengagement slot (7) opening downwardly away from the slat (5) and being configured such that the channel (6) of a second identically configured roller shutter lath (3) can be hooked therein;
• and
• a canopy-like projection (10) formed by said underside (10) between the interengagement slot (7) and a front side (8,9) of the lath (3) that extends along the length of the roller shutter lath (3) alongside the slot (7) and forms a sunroof protruding forwardly of the light/air slots (22) in the lath (3) located underneath which shades the light/air slots (22) of an underlying lath (3).