(57) An adjustable slat (10) for shutters, designed to be coupled with respective angular
rotation supports fitted in turn on window opening uprights, the slat being of the
type comprises a flat rear side (11) and an opposite side (12) arranged at a certain
angle to the previous side. The two sides (11, 12) form a cavity (13) delimited by
a side with a curved edge (14), presenting a first coupling area (A), and by the other
side with a second curved edge (18) opposite the previous one and specular with respect
to the longitudinal centre line and in turn comprising a second area (B) which allows
the coupling between adjacent slats. The first coupling area (A) comprises three consecutive
housings (15, 16, 17), the internal cavity (17) being delimited by a projection (23)
which separates it from the central cavity (16) in turn delimited by a second projection
(24) separating it from the outer:cavity (15), while the second coupling area (B)
comprises protruding longitudinal strips or ribs (19, 20, 21) defined by respective
cavities (27, 28). Moreover, the sloping side (12) of the slat (10), close to the
second area (B), presents a protruding rib (29), which in cross-section has the shape
of a tooth with a partial undercut, designed to engage in a housing (40) of the corresponding
support (30), to ensure stable positioning which is fixed with respect to the extraction
direction.
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