Patent ID: 6868637

Claim:
A handling door for an industrial building, comprising: a flexible curtain or apron having a plurality of parallel sheaths, each having a plurality of cut-outs therein; a plurality of reinforcing bars or tubes extending horizontally through a respective one of said plural sheaths; a hauling bar extending through one of said plural sheaths; a plurality of hauling straps that move the flexible curtain from an open position to a closed position; a plurality of strap runners connecting adjacent ones of said plural reinforcing bars; and means for retaining and immobilizing the plural reinforcing bars within respective sheaths, said means for retaining and immobilizing comprising recesses in each of said plural reinforcing bars, each of said recesses is aligned with a respective one of said plural cut-outs so that a respective one of said strap runners is within a respective one of said recesses and through a corresponding one of said cut-outs.