High load operation of an industrial roll door

Flexible or portable closure – partition – or panel – Roll type – With fabric free edge connected operator

Reexamination Certificate

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Details

C160S265000, C160S133000

Reexamination Certificate

active

10838783

ABSTRACT:
A high load operation industrial roll door, including a flexible door curtain windable about a top roll positioned above a door opening and provided with a drive system. The roll door includes a bottom beam fastened to the door curtain, and a biasing spring, for resisting movement of the door upon application of a load thereon, and a positive stop preventing movement of the biasing means beyond a predetermined point.

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