Abstract: Containers for receiving solid particulate product and for fluidizing and dispensing said product under the influence of a pressurized air flow. The present containers comprise a product compartment having a substantially vertical interior wall of air-permeable fabric, structure for supporting said vertical interior wall closely spaced from the exterior, vertical shell or wall of the container to provide an interconnecting narrow air space therebetween around the entire inner periphery of said shell, and structure for introducing pressurized air into said air space and through the air-permeable interior wall to fluidize substantially all of said particulate product which is in contact with said substantially vertical, air-permeable fabric inner wall.

Abstract: A closed system for fluidizing and conveying solid particulate material from one or more porous floor supply containers to one or more receptor containers by means of aeration while preventing the release of aerated particulate material into the atmosphere. The system comprises at least one porous floor supply container which receives pressurized air to fluidize the particulate material and which feeds the fluidized mixture to a delivery conduit which communicates with the receptor container(s). The invention comprises venting the supply container to a material recovery unit to isolate the vented aeration air and all of the particulate material carried thereby and then readmitting at least said vented particulate material to the system, the vent air being passed through a filter before release to the atmosphere.