摘要 |
<p>The device (1) has roller devices for rolling/unrolling covers (3a-3d), where each device rollingly retains the covers in a position and unrollingly retains the covers in another position. A guide unit (5a) e.g. telescopic rod, is set into an extended condition from a retracted condition and vice-versa. A drive mechanism i.e. electric motor, is coupled with the guide unit and/or the roller devices such that the roller devices are set in the latter position from the former position and/or from the latter position to the former position.</p> |