Flexible curtain closure device drive and containment mechanism

摘要

A roll-up closure device (FIG. 1 ) comprising a light weight flexible curtain ( 1 ), an extruded profiled edge ( 2 ), a synchronizing drive mechanism ( 3 ), a vertical retaining means ( 6 ) and a take up means ( 7 ). Said roll-up closure device eliminates the need for horizontal retaining mechanism positioned across the opening and the counter balance devices commonly associated with light weight flexible curtain roll-up closure devices as a means of preventing the curtain from being pulled out of the vertical retaining guides due to differential pressures that may exist in the closure device environment.