Designed to open up and close windows in difficult to reach areas, electric screen openers, or actuators, are exceptionally handy.
They work with a motorised folding arm that is attached to a screen. The arm starts in a folded placement, however since it is powered by the engine, it starts to unfold. The arm is put in a manner that as it begins to unfold, the window begins to open up. To close a home window, the arm begins to fold back again up into its primary position, bringing the window to a close.
It is simple in framework, easy to install, just gently press the rack in the sliding door handle on the entranceway frame, the door can be easily opened.
The opening mechanism for a rack and pinion works by converting rotational Automatic Window Opening System gear rack motion into linear motion. The pinion is a circular equipment, which engages a linear bar that has been fitted with teeth, known as the rack; power can be put on the pinion leading to it to rotate, which subsequently makes the rack move in relation to the pinion, which converts the rotational movement of the pinion into linear movement. For electric home window openers, the rack is housed in external casing and is mounted on the home window. As the pinion moves, the rack is definitely pushed out, starting the screen along with it.
These are usually suited to side hung windows or doors, as they offer a 90-degree opening. They are also called folding arm actuators and can be designed to open inwards, outwards or 
both ways.
The object of the present invention is achieved, through the center gear shaft fixed on a frame, which is fixed to the frame, is fixed to the sliding gear engages with the rack on the rail of the frame, fixed to the corresponding door there could be engaged with the stationary equipment rack, the slide rack when the pushing handle on the door, so that the rotation from the apparatus rack fixed on the entranceway, the door motion, so that the entranceway is opened, with a gear fixed to the frame reset spring.
The object of the present invention is to provide a device with a special double rack door when the sliding door.