| 摘要 |
A raisable-curtain door for closing a door-bay through a wall between two volumes of air maintained at different temperatures includes two vertical side uprights, each of which forms a slideway delimited by two vertical edges and a raisable curtain having side portions that slide in the slideways. Each of the side uprights includes two vertical metal bars forming respective edges of the slideway, which bars are separated from each other so as to define the associated slideway over substantially the entire height of the upright. A first of the vertical bars is located closer to the wall than the second of the vertical bars. The first bar is in draft-proof contact with the wall and in substantially draft-proof contact with the curtain over the entire height of the curtain when the curtain is down.
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