gripping fingers 12 upon withdrawal of the finger pressure follow and slide as far as the botton rail 7 and then remain in the box 1 held by rail 7 the embodimemt with the spring 11 is to be considered only one of preferred embodiments in a simpler form of the invention the provision of the sloping face 9 alone is sufficient wherein this sloping face may also extend from the rear wall 8 of the box 1 up to the bottom rail 7 without forming an angle 13 fig 3 therebetween the sloping face 9 is shaped in such a manner that the cassettes 3 slide forwards under their own weight that is to say slide downwards along the sloping face 9 in the embodiment of the box 1 shown in fig 2 the cassettes are arranged lying flat the guide rails 16 molded on the opposite side walls 15 of the box 1 and having an edge 17 raised up toward the front side 2 serve to support the cassettes 3 the edge 17 is comparable with the bottom rail 7 as seen from fig5 the guide rails 16 extend at an angle u03b1 to the base 4 of the box 1 as a result a sloping slide face is again forced by each rail 16 for the cassettes 3 which abut against the edge 17 in the transport direction as shown in fig6 in a further embodiment of the storage container the guide rails 16 are provided with a sloping face 18 which is comparable with the sloping face 9 the.