POLYGONAL TILT DRUM FOR VENETIAN BLINDS
First Claim
1. 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, said ladder drum comprising:
- an elongated polygonal cylindrical structure having a plurality of exterior plane sidewalls defining a substantially hollow interior, said exterior sidewalls having at least two walls that are equal in dimension but that are 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 two primary reinforcing ribs which are oriented at vertical angles and diverge from the central tilt rod aperture, thereby defining a sequence of at least four cavities within the profile structure; and
a pair of tapered access slots, laterally converging in parallel relation to each other from the front and rear edges of two nonadjacent mediate sidewalls, each terminating with an enlarged intersecting aperture to accommodate the insertion and retention of corresponding tabbed ladder legs of a ladder cord.
1 Assignment
0 Petitions
Accused Products
Abstract
A ladder drum for adjusting and regulating the angular orientation and closure of horizontal slats of a venetian blind, of the type incorporating ladder cords or tape ladders, having a polygonal profiled structure comprising a series of planar sidewalls defining a substantially hollow interior. The number of sidewalls defining the polygonal structure is greater than four sidewalls, and less than or equal to twelve sidewalls, with each adjacent plane sidewall having an internal angular orientation in the range of 90° to 150°. To enhance the uniform closure of the slats of a horizontal blind, the polygonal ladder drum is more preferably in the form of an uneven hexagon that is either formed from injection molded plastics or a metal die stamping. The opposing top and bottom sidewalls are greater in measurement than the remaining mediate sidewalls, with at least two opposing mediate sidewalls having attachment means to insert and retain ladder cords in a counter balanced relation. The lateral peripheral edges of the profile body have either flared openings or notches to catch and re-spool misaligned ladder cords. Ladder tapes may also be secured to the profile structure through die cut serrated prongs or through the use of a detachable serrated clip.
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Citations
42 Claims
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1. 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, said ladder drum comprising:
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an elongated polygonal cylindrical structure having a plurality of exterior plane sidewalls defining a substantially hollow interior, said exterior sidewalls having at least two walls that are equal in dimension but that are 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 two primary reinforcing ribs which are oriented at vertical angles and diverge from the central tilt rod aperture, thereby defining a sequence of at least four cavities within the profile structure; and a pair of tapered access slots, laterally converging in parallel relation to each other from the front and rear edges of two nonadjacent mediate sidewalls, each terminating with an enlarged intersecting aperture to accommodate the insertion and retention of corresponding tabbed ladder legs of a ladder cord. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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 or tape ladders, said ladder drum comprising:
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an elongated polygonal cylindrical structure formed from a metal blank that is cut and creased into a series of rectangular facets, with two laterally extending side sections having a perimeter geometry corresponding to the configuration of the tilt drum profile, the facets and sections of which fold inward to form an enclosed hollow structure; a pair of aligned tilt rod apertures that are centrally located within the laterally extending side sections, said apertures being contoured to receive the insertion of a polygonal control rod of the Venetian blind tilt mechanism; and 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. 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 cord or tape ladders, said ladder drum comprising:
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an elongated polygonal cylindrical structure having a plurality of exterior plane sidewalls defining a substantially hollow interior, said exterior sidewalls having at least two walls that are equal in dimension but that are 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 two primary reinforcing ribs which are oriented at vertical angles and diverge from the central tilt rod aperture, thereby defining a sequence of at least four cavities within the profile structure; and a pair of tapered access slots, laterally converging in parallel relation to each other from the front and rear edges of two nonadjacent mediate sidewalls, each terminating with an enlarged intersecting aperture to accommodate the insertion and retention of corresponding tabbed ladder legs of a ladder cord. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification