Bulk material retaining system having plural retainers

A bulk material retaining system comprising a generally rectangular parallelepipedic container including a top and bottom, right and left sides and front and back ends, wherein the back end of the container is an operable closure made generally of left and right doors mounted for pivotal movement about a vertical axis at the back end of the left and right sides respectively, a first retainer positioned vertically between the free end of the left door in a closed position and the right side of the container in spaced relation to the back end of the right side of the container, a second retainer positioned between firstly the left side of the container in spaced relation to the back end of the container and secondly along a continuous line extending upwardly first against the lower portion of the first retainer and then against the left door kept in a closed position, the second retainer being in a position vertically inclined toward the left side of the container and toward the left door kept in a closed position, a flexible liner supported within the container of substantially the same size as the container, said liner includes means for passing bulk material into it and evacuating air therefrom and means for discharging bulk material from the liner, and a manifold secured to the first retainer through which bulk material is discharged from the liner.