Sliding security door

High-security sliding door apparatus for closing and opening a corridor, the apparatus including:

• (a) a high-security sliding door for use in a correctional institution, the sliding door having top and bottom edges, (b) a door frame having a track adjacent to the top edge of the door, (c) a carriage secured to the top edge of the door and having track-engaging rollers, and (d) a drive mechanism for opening and closing movement of the door, the drive mechanism including:
• a bi-directional effector secured inside the frame;
• a slide plate slideably secured to the carriage and having two end sections and being driven by the effector;
• a position sensor for sensing position of the slide plate;
• a power-storing power source;
• and
• a controller configured to enable the door to be continuously closed but not locked when a continuously-closed signal is received by the controller, wherein the controller is further configured to control the movement of the slide plate.