Semi-bulk vacuum packer for fine low bulk density dry powders

Details Semi-bulk vacuum packer for fine low bulk density dry powders Semi-bulk vacuum packer for fine low bulk density dry powders

1997-09-10

1998-09-22

Johnson, Linda

Package making

Methods

With contents treating

53436, 53469, 53512, 53527, 53255, 141 59, 141 65, 141314, B65D 126, B65D 3100

Patent

active

058097449

ABSTRACT:
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and when the volume/quantity of particulate is achieved, the vacuum pressure ceases, and the vacuum shell (10) is withdrawn from the container.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).

REFERENCES:
patent: 2806771 (1957-09-01), Cuthertson
patent: 2815621 (1957-12-01), Carter
patent: 3218778 (1965-11-01), Moreland
patent: 3377945 (1968-04-01), Davis
patent: 3468095 (1969-09-01), Vogt
patent: 3847191 (1974-11-01), Aronson
patent: 4457125 (1984-07-01), Fishburne
patent: 5339871 (1994-08-01), Collins et al.
patent: 5447183 (1995-09-01), Derby
patent: 5474111 (1995-12-01), Williamson et al.
Advertisement, "Automated Packaging Systems and Conveyors Co.", Jan. 30, 1991.
Advertisement, "Dry solids Densifiers", 1992, Carman Industries.
Advertisement, "Feeding Vacuum Conveyors", Semi-Bulk Systems Inc.

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