Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent
1998-11-27
2000-11-14
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Roll type
With rotating means
160291, 160 8402, A47G 502
Patent
active
061455725
ABSTRACT:
A goods-handling door for opening and closing a bay in a wall, the door including a flexible curtain (1), said bay being closed off when the curtain is deployed, and open when the curtain is gathered up on an edge of the bay, the door including a rolling-up shaft on said edge of the bay for receiving said curtain, or straps serving to displace said curtain by folding it up, the rolling-up shaft being rotated by an electric motor, said curtain having an edge fixed to said shaft or in the vicinity of said shaft, and a displaceable free opposite edge, said door being characterized in that it includes a safety system including firstly at least one elongate element such as a strap that can be rolled up with the curtain or with the straps on said rolling-up shaft while one end of said strap is fixed substantially to the free edge of the curtain, and secondly signal-emitting means for emitting a signal when the tension of the strap (10) drops below a predetermined threshold.
REFERENCES:
patent: 5307859 (1994-05-01), Kraeutler
patent: 5706875 (1998-01-01), Simon
Johnson Blair M.
Nergeco S.A.
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