Vertical blind with corrugated surface

摘要

There is disclosed a blind slat to be used particularly for vertical blinds wherein at least the outer surface is formed with regularly distributed successive corrugations. In practice, the inner face is also corrugated. The slat is extruded from a plastic material of one basic color and preselected opposite surfaces forming the corrugations are of a color which is different from the basic color. Some or all of the remaining opposite surfaces have the basic color or a color which different from the basic color and from the color of the preselected opposite surfaces. Such blind slat is particularly useful to create special effects for example by vertical blinds. The method and the apparatus for producing these blind slats are also disclosed.