a distance b lower than the level of the end roller 15a as shown in fig1 b the conveyor belt 15 is pivoted in the direction q and the fiber bale 1b is thereafter moved onto the conveyor belt 14 by virtue of the motion of the conveyor belt 15 by virtue of the pressure cylinder 49 the support roller 15b is lifted to a level which is by the distance c higher than the level of the support roller 15a fig1 a and 15b show how initial bales 1a and countersupporting additional bales 1b may be delivered to the conveyor belt 14 by means of a stationary bale supply device 15 it is noted that the tilting possibilities of the construction shown in fig1 a and 15b may be applied by appropriate modifications to the conveyor belt 48 of the carriage 22 it will be also understood that a driven roller track or the like may be used as the bale transporting device instead of conveyor belts 48 15 the invention may find application in case of a bale series 1a 1b positioned stationarily on the floor of the plant or deposited on a conveyor belt roller track or the like in a displaceable manner turning to fig1 the invention further may find application in cases where an initial bale 1a and a countersupporting bale 1b 39 are at an inclination toward one another in a direction transversely to the working direction of the bale opener and additional countersupporting bales 1b 39.