Patent ID: 7438115

Claim:
An architectural covering including a vertically-extending layer of shade material between an elongate longitudinally-extending roller and an elongate longitudinally-extending bar; an elongated groove extending longitudinally along the length of the outer surface of the roller; a top portion of the layer of shade material being attached to an elongate longitudinally-extending top attachment member in the groove; the layer of shade material extending longitudinally along the roller so that partial rotation of the roller causes the layer to move vertically and continued rotation of the roller winds the layer around the roller, characterized in that: the outer surface of the attachment member has at least two peaks along its length such that when the upper portion of the layer of shade material is attached to the attachment member, the peaks extend through the upper portion of the layer through an open structured section of the top portion of the layer, wherein the shade material comprises a plurality of vertically-extending layers including a front layer and a rear layer, the outer surface of the roller comprises a plurality of radially spaced apart grooves, and a top portion of each layer is attached to a different attachment member in a different groove, wherein a bottom portion of each layer of shade material is also attached to an elongate longitudinally-extending bottom attachment member and an elongate longitudinally-extending slit in the bar; the outer surface of the bottom attachment member having at least two peaks along its length such that when the bottom portion of the layer of shade material is attached to the bottom attachment member, the peaks extend through the bottom portion of the layer, wherein the bar has a generally U-shaped profile with a front wall, a rear wall, a bottom wall and the slit is between the front and rear walls and provides access to an interior space, and wherein an elongate longitudinally-extending undercut bottom pocket is located within the interior space of the bar, along the top of its front wall, preferably integral with its top wall, and the bottom pocket has a downwardly open, elongate, longitudinally-extending mouth which opens into the interior space, such that when the front and rear layers together with the bottom attachment member are attached to the bar, the layers extend downwardly through the slit into the interior space and upwardly through the mouth into the bottom pocket.