Abstract: A device for opening and closing a sliding-door, of the type wherein the rollers by which the door is carried sink into recesses in the guide-rail when the door is in front of the doorway so that the door, when opening it, has to be lifted somewhat, said device comprising a lever rotatable around a rotation shaft, the one arm of which is provided with a push-off cam and the other arm of which forms an operating handle, said lever being supported in the door in such a manner that, when the door has almost reached a final position, the lever can assume a position which is inclined in respect of a vertical line, by which the operating handle will be at a larger distance from the immediately adjacent post of the door-frame than the rotation shaft of the lever.

Abstract: Device for operating a sliding door comprising an endless chain guided over at least two wheels in a plane parallel to the plane of the door, said chain being provided with at least one catch which can co-operate with at least one abutment connected to the door for opening and/or closing said door. The guiding wheels of the chain being positioned such that the direction of movement of the catch has a relatively large vertical component at the beginning of the movement of the door.

Abstract: A sliding door construction including a door provided with rollers at its upper edge, which rollers are supported for rolling along a V-shaped portion of a guide rail having recesses adjacent the locations of the rollers in the closed position of the door for moving the door slightly downwards and towards the wall just before reaching its closed position. The guide rail is provided at one block for arresting the sliding movement of the door and a detachable cover for concealing the rollers and the upper edge of the door from view.