Abstract: A closing device including a tubular cover; a rotating member disposed at least partially inside the cover; a torsion member connected between the cover and the rotating member; and a pulling member at least partially into the cover; the pulling connected to the rotating member; whereby extension of the pulling member away from the cover adjusts a torque in the torsion member to affect a closing. A method of closing a sliding screen door includes attaching the cover to a stationary member and attaching the pulling member to a sliding screen door. The door may be slid to an open position; whereby a torque in the torsion member is increased. The door may then be released; whereby the door is moved from the open position to a closed position by a linear force created in the pulling member through rotation of the rotating member by release of the torque.

Abstract: A device that has adjustable torque, and is used for the mechanical automation of closing a sliding screen door panel in a manner that is consistent with the force of a natural beings manual operation of the sliding screen door panel. The device is engineered to be consistent with the design of the said sliding screen panel, to prevent failure of the sliding screen panel after longterm continuous use with the device.

Abstract: A device that has adjustable torque, and is used for the mechanical automation of closing a sliding screen door panel in a manner that is consistent with the force of a natural beings manual operation of the sliding screen door panel. The device is engineered to be consistent with the design of the said sliding screen panel, to prevent failure of the sliding screen panel after longterm continuous use with the device.