Do you ever wonder, after sliding a door, where it disappears into? In some cases, the answer is easy. It slips behind or over the anchored other door. Other cases are more mysterious; the door glides into an unseen recess in an adjoining wall, hence, the name pocket door. Sliding closet doors, laundry or utility room and shower doors are familiar examples of pocket doors. Their purpose is to save space by providing more floor expanses in comparison to traditional doorways where the panel is swung forward or back.Sliding closet doors are space-economizing not unlike shoji screens in Japanese homes, with one white paper panel slipping next to another within a latticed screen frame. The mechanism for how to install a sliding door panel is that it should run through rollers fixed into place by a track secured inconspicuously by the door frame. The track and roller are usually made of steel, although PVC tracks are more common while wood and aluminum tracks are also being used.Installing a sliding panel such as for a wardrobe entry may be done by hanging one from a top track or mounting it on a bottom track. With panels suspended from a pair of hangers in an overhead trolley, a top hung gear system has lightweight doors that glide easily. It is because the hangers assume the weight of the door. With panels propped on a pair of roller wheels along a floor track, a bottom rolling gear system has heavier doors since their weight has wider distribution downwards. At each end of the track is a stopper for keeping panels open or close and also for subsuming the impact caused by the sliding action.While sliding closet doors are used mainly for space efficiency, many contemporary homes and hotels use other sliding entry systems for their sheer attractiveness. A good example is sliding glass doors, also called Arcadia doors, used mostly for dramatic effect, like in movies. Others are porch, sitting room, lanai, spa bathroom and patio doors. Although they are now associated with modern interiors, this type of openings was actually in vogue as early as in Victorian era homes.