Abstract: A door actuating system for reversibly displacing a door in a longitudinal direction. Energization of a motor causes frictional engagement of a drive bar which is secured to the door. The drive bar is frictionally driven in a first longitudinal direction to correspondingly displace the door into an open condition. Upon opening of a doorway, the motor is de-energized and a counter-weight drive mechanism is actuated for frictionally driving the drive bar in a second longitudinal direction for closing the doorway.