| 摘要 |
An apparatus for opening and closing a portal in a structure in which a curtain (18) having elongated side portions (21, 22) is placed adjacent opposing sides (12, 13) of the portal (11). A first end (19) of the curtain (18) is attached to a first end (17) of the portal (11). An opposite end (23) of the curtain (18) is upturned and attached to varying means (31, 33) at the first end (17) of the portal (11) to vary the height of a pocket (24) formed in the curtain (18). Magnetic sealing means (26, 27) are placed on the elongated side portions (22, 23) of the curtain and on the opposing sides (12, 13) of the portal (11). The portal (11) is closed as the varying means (31, 33) lowers the height of the pocket (24), wherein the magnetic sealing means (27) on the curtain (18) engage the magnetic sealing means (26) on the opposing sides (12, 13) of the portal (11), thereby sealing the portal (11). The portal (11) is opened as the varying means (31, 33) raises the height of the pocket (24), wherein the magnetic sealing means (27) on the curtain (18) disengage the magnetic sealing means (26) on the opposing sides (12, 13) of the portal (11), thereby unsealing the portal (11).
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