Patent ID: 7926541

Claim:
A ladder drum, which pivotally mounts to a control rod within a Venetian blind tilt mechanism, for selectively regulating the angular adjustment and closure of slats in a horizontal blind assembly of the type incorporating ladder cords and tape ladders, said ladder drum comprising: an elongated polygonal cylindrical structure having a plurality of exterior plane sidewalls defining a substantially hollow interior; said exterior plane sidewalls having at least two opposing walls that are equal in dimension but greater in measurement than the remaining mediate sidewalls that define the profile structure; a tilt rod aperture longitudinally extending through the central section of the polygonal cylindrical structure; said aperture formed to correspondingly receive a polygonal control rod of the Venetian blind tilt mechanism; a hollow profile segmented by at least five primary reinforcing ribs which diverge from the central tilt rod aperture defining a sequence of longitudinally extending hollow cavities, with at least two cavities having an open end and a closed end, with said ribs demarcating no less than two upper cavities, two mediate cavities, and one bottom cavity within the profile structure; a pair of access slots reciprocally located on nonadjacent mediate sidewalls of the profile body to accommodate the insertion and retention of corresponding tabbed ladder legs of a ladder cord; a single tapered notch, transforming into a wider retaining slot, longitudinally being defined within the bottom cavity of the profile structure; said wider retaining slot bisecting at least one of the two opposing larger sidewalls of the polygonal tilt drum and the single tapered notch having a midsection that is greater in width than origin or terminus of the wider retaining slot.