Patent ID: 8857495

Claim:
A blind for a building opening, and comprising; a head rail attachable adjacent to the building opening; a first blind roller in said head rail; a first blind panel attached to said first blind roller in the head rail, and adapted to be lowered over the building opening, and to hang downwardly in a substantially vertical first panel plane, said blind panel defining panel edges along each side thereof; said first blind panel in turn comprising a face sheet, and an intermediate sheet; said face sheet being attached along a first side of said first blind roller; said intermediate sheet being attached to said first blind roller along a second side of said first blind roller, diametrically opposite to the attachment of said face sheet on said first side of said roller, whereby said face and intermediate sheets hang from opposite sides of said first blind roller, in spaced apart relation; transverse strips connected between said face and intermediate sheets and extending in horizontal spaced apart relation; first blind panel control mechanism in the head rail adjacent one end thereof whereby said first blind roller can be partially rotated for moving said face sheet relative to said intermediate sheet and thereby partially rotating said transverse strips; first blind control cord elements connecting with said first blind control mechanism, and hanging down therefrom in a substantially vertical element plane; first blind cord element guides in the head rail leading the first blind control cord elements forwardly; a second blind roller in said head rail, and a second blind panel attached thereto; a second roller drive mechanism, and a second roller control element for operation of said second roller drive mechanism; and, second blind control element guide ribs for guiding said second blind panel control element, and locating said second blind panel control element forward of the edges of said first and second blind panels; wherein said second blind panel is formed of a light obscuring material, to provide substantial exclusion of light.