shows a preferred embodiment of the invention in that the hopper closure 14 is equipped with an electrical vibrator 49 to help empty the contents which have been dumped from the container or containers into the hopper closure 14 fig7 and 8 are views from the bottom of the hopper closure 14 inside the hopper closure 14 the inside of the hopper closure 14 is equipped with container stop means 50 for holding the container or containers in the proper position and for breaking up aggregated container contents as the contents are dumped from the container into the hopper closure 14 the stop means 50 may be a series of horizontal bars running across the hopper closure at a depth inside the hopper to hold the container in the proper position in another embodiment of the invention the inside of hopper closure 14 is equipped with a container sealing means 51 for insuring that contents dumped from the container do not spill out of the hopper by making their way between the sides 23 front 31 or back 22 and the container sides this sealing means 51 is preferably made of a resilient material such as a rubber or plastic foam such as polypropylene foam the container fits snugly into the hopper closure 14 with the sealing means 51 pressing its sides fig7 is a bottom view of the hopper closure 14 of fig2 and illustrates a hopper closure 14 adapted to receive boxes or crates fig8 is a bottom view of the hopper closure 14 of fig4 and illustrates a hopper closure adapted to receive four drums or barrels one embodiment of.