By Doris RufOn Dec 05, 2017 Ideas
Horizontal blinds use a thin woven corded ladder system to suspend the slats and enable them to be closed or opened via a rotating drum to which each upper end of the woven ladder is wrapped and attached. A lift cord allows the blind to be pulled up and stack tightly to top of the window when desired.
Vertical blinds use a generally wider slat and one can pull a cord to stack the slats together, to one side, or to separate them in the centre and stack them on each end. The slats can be rotated via a rotating shaft in the upper head rail housing, which runs through independent geared carriers that convert the twisting of a tilt rail to a rotation of each individual slat in synchrony. The original vertical blinds were invented in Kansas City, Missouri by Edward Bopp and Fredrick Bopp, who held the original patent. The company name at the time was Sun Vertical. In the 1960s, the patent and company were sold.
The term window blinds is also sometimes used, somewhat inaccurately, to describe window coverings generically—in this context window blinds include almost every type of window covering, including both curtains and blinds for homes and commercial premises, such as bars/pubs, offices, and shops, e.g., Plantation Shutters/Jigsaw Shutters, Roman blinds, roller blinds, and of course, vertical and horizontal blinds.
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