SEMI BULK VACUUM PACKER FOR FINE LOW BULK DENSITY DRY POWDERS

摘要

A vacuum shell (10) defines an inner cavity (18) in which particulate materials are packed via vacuum pressure. In use, the vacuum shell (10) is positioned within the container (such as sack (16)), and the open end 15 of the shell 10 is brought into contact with a surface (such as platform (17 or 17')) such that a vacuum tight compartment is created. Particulate material is supplied through port (26 or 27) into the inner cavity (18) while vacuum pressure is applied. The particulate material is densified within the inner cavity (18) under the vacuum pressure, and when the volume/quantity of particulate is achieved, the vacuum pressure ceases, and the vacuum shell (10) is withdrawn from the container. To enhance filling, the filter media inside the vacuum shell (10) can be periodically pulsed with air or other suitable gases to remove particulate cakes from the filter material (22).