as shown in fig5 b adjacent to dumping unit 38 is a preferably sloped second conveyor means 56 56 39 preferably a roller conveyor for receiving emptied bins and returning them by gravity to a destination which may be marshalling area 58 conveyor section 56 56 39 may have a folded path as shown in fig1 and 2 which path may include a roller conveyor crossover section 57 57 39 of conventional design the initial portion 60 60 39 of section 56 56 39 is mounted lower than and canted away from dumping unit 38 38 39 at an angle of preferably about 20 degrees such that dumper conveyor 48 48 39 is substantially coplanar with portion 60 60 39 when frame 40 40 39 is rotated through the equivalent angle in a second rotational direction from horizontal as shown in fig5 c to cause an emptied bin 26 to be expelled by gravity from dumping unit 38 onto conveyor portion 60 60 39 preferably conveyor section 56 56 39 is provided with guide rollers 62 along its lower edge to facilitate conveyance of bins along the conveyor preferably the angle of cant is progressively lessened along the length of conveyor 56 56 39 such that the conveyor is non canted at its distal end 64 64 39 preferably section 56 56 39 is provided with a bin washer 66 66 39 such that the interior of each bin may be washed automatically as desired prior to the bin being.