Abstract: Door operator device comprising an indicator that the door is in either fully opened or fully closed condition, including a drive for moving the door to these positions in response to operation of an initiator connected therewith. The device includes a switch circuit to switch off the drive when the door has reached either of the positions, and the indicator is operatively interconnectable with the door operator device to provide the information that the door is in its fully opened or closed condition.

Abstract: A mullion section member is disclosed for fitting between a pair of adjacent roller shutter doors in a door opening. The mullion section member is of a suitable length, has opposed channels at opposite sides each for slidably receiving the edge of the curtain of a respective roller shutter door. A portion bridges the two channels, and behind said portion on the inside face of the mullion section member, there is provided flange means defining a recess between said flange means and said portion, in which a plate-like tongue member is slidably received to slide longitudinally of the length of the mullion section member. This permits the releasable fastening thereof to a similar mullion section member fastened relative to said door opening. The tongue member has a cut-out at one side which is hidden by said flange means.

Abstract: A roller shutter door limit sensing means comprising a screw member for rotation in response to rotation of the drum onto which the curtain of the roller shutter door is wound, a limit switch actuator means threadably carried by the screw member to advance or retreat therealong in response to its rotation operates a corresponding opposite limit switch means, whereby the switch means can be activated for the curtain fully closed or the curtain fully opened positions whereby to switch off an electric drive means which opens or closes said roller shutter door.

Abstract: A roller door and frame combination is disclosed. The roller door has corrugations therein and the corrugations are maintained in the desired shape by flexible wearing strips at each side of the door and fastened to crests on one face of the door. The frame has channel members at each side in which the door slides. The channel members have a resilient friction surface therein which is arranged to engage with the face of the door which does not have the wearing strips fastened thereto and the friction surface is of such size as to restrain the door against lateral back and forth movement in the frame and provide controlled resistance to sliding of the door should the door thickness change.

Abstract: The present invention relates to a door handle lock and latch mechanism for a corrugated roller shutter door wherein the door handle is situated some distance up from the bottom of the door.The door handle and lock is situated in a corrugation which is open to the front face of the door and the latch mechanism is located in an adjacent corrugation(s) open to the rear face of the door. The latch mechanism attaches to the lock mechanism through an opening in either or both of the top or bottom wall of the corrugation in which the lock is situated.