Abstract: A roller shutter slat has hollow sectional slats (1) with a central part (1c), two edge parts (1a) and transverse grooves (1b) arranged therebetween for receiving bearing or adjusting links (3, 4). The edge parts (1a) and the central parts (1c) are spaced apart and interconnected by linking elements (5, 6, 40, 41) inserted into hollow chambers (26) of the hollow sectional slat (1). The cross-section of the linking elements (5, 6, 40, 41) is narrower than the cross-section of the hollow chambers (26) and the linking elements (5, 6, 40, 41) are linked to the hollow sectional slats (1) by tongue-and-groove joints (9, 10; 42, 43). Easy-to-produce grooves (1b) are thus created without weakening the roller shutter slat (1) in the area of the grooves (1b).

Abstract: A louverable roller blind has lamellar blind slats (14), similar to Venetian blind slats, hingedly linked at their upper areas to pull chain elements (21, 40) and at their lower areas to adjusting chain elements (23, 41). The blind slats (14) are further laterally guided in stationary guide profiles (31). Pins (32) that connect the adjusting chain elements (23, 41) to the blind slats (14) are spaced apart from a plane in which hinge pins (30) of the adjusting chain elements (23, 41) are located. The hinge pins (30, 32) that link the pull chain elements (21, 40) and the adjusting chain elements (23, 41), as well as swivelling pins (16) of the blind slats (14), are mutually aligned when the roller blind is not used as a Venetian blind. This alignment allows the roller blind to be rolled up without problems in a reduced space and to be used as a Venetian blind with no need for special aids.