Flexible or portable closure – partition – or panel – Roll type – With guides or fabric edge holders
Patent
1984-02-09
1986-07-22
Britts, Ramon S.
Flexible or portable closure, partition, or panel
Roll type
With guides or fabric edge holders
160133, 160242, 98 50, E06B 917
Patent
active
046013202
ABSTRACT:
A pressure differential compensating door includes a curtain for closing a doorway having a first upper end, a second lower end and side edges and a curtain winding mechanism having the first end of the curtain attached thereto for raising and lowering the curtain. In addition there is a pair of spaced apart guide channels in which side edge sections of the curtain are movable. These side edge sections are sealingly engagable with the channels. A door pressure releasing mechanism connects the door in sealing engagement with a door surrounding structure. The releasing mechanism is operable to move the door away from the door surrounding structure prior to the curtain being raised and to release any pressure differential existing on opposing sides of the door. Special friction reducing members are fixed to both of the side edge sections and extend therealong to reduce the amount of friction between these sections and their guide channels.
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Britts Ramon S.
Purol David M.
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