| 摘要 |
<p>A curtain 12 of pocket-forming material layers (22, 32) is sealed by seal strips (46, 50, 62, 66) on the edges of the layers which slidingly engage seal guides (74, 78, 84, 88) provided in side frame channels (18, 20), and a housing structure (16) forms a top seal for the curtain (12). Weight bars (28,38) in the lower extremities of the sheets (22, 32) enhance the seal on the bottom and keep the layers of material separated, and rotatable separating rollers (102, 104, 106) in housing (16) keep the layers separated and help in forming a top seal. A smooth operating manual chain drive (110, 112) and anchor mechanism (120) is provided, as well as a removable decorative fabric (54) for the front of the assembly. Alternative embodiments include top seal guide extensions for separating the layers, a bottom curved seal guide for accommodating the lower ends of edge seal strips (46, 50, 62, 66) to prevent binding and loss of bottom seal by accommodating differential length movement of front and rear layers (22, 32), and edge seals for inner layers adapted for sealing edges as well as for maintaining layers separate in non-vertical applications.</p> |
