Assa Abloy Entrance Systems Ab

Albany International Corporation

Holger Siewert

Raymond Sauve

Mikael Bengtsson

Hakan Larsson

Jan Victor

Kent Palsson

Friedhelm Frede

Meinolf Steffen

A mechanical link is provided to lessen or eliminate air infiltration between a topmost lamella of a rollup door and the lintel of the doorway. The link is deployed in an unfolded configuration to support the topmost lamella against deflection caused by application of a force perpendicular to the plane of the door. The link components are folded into a storage position upon rolling up of the door upon a series of take-up discs.

System for stabilizing the top lamella against wind load by using a linear chain

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.

High load operation of an industrial roll door

Growing community of inventors

Rheda-Wiedenbrueck, Germany

Holger Siewert