Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1986-09-12
1988-12-13
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264DIG9, 425 4C, 432 15, 432 58, 432118, C08J 922, F27B 1508, F27B 1509, F27B 1514
Patent
active
047909676
ABSTRACT:
A compact, self-contained apparatus and method for expanding loose fill foam material for packaging includes an eductor having a fan, a venturi chamber, and a wire mesh cage arrangement for automatically feeding expandable loose fill material to a hopper. The loose fill material is then uniformly fed through the hopper by air pressure in conjunction with gravity to an expansion chamber. The expansion chamber includes a stepped conveyance platform disposed over a stepped steam chamber, and a track arrangement for simultaneously conveying and tumbling the loose fill material across each conveyance platform step. A condensing unit disposed above the expansion chamber removes excess moisture from the expansion chamber and provides warm dry air to a discharge housing from which the expanded loose fill material is discharged from the expansion chamber.
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Anderlind Erik T.
Guillemard Jean-Pierre
Anderson Philip
Compex Expanders S.A.R.L.
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