Tobacco expansion batch forming, unloading and expansion agent p

Details Tobacco expansion batch forming, unloading and expansion agent p Tobacco expansion batch forming, unloading and expansion agent p

1997-10-07

2000-05-30

Derrington, James

Tobacco

Tobacco treatment

Extraction of component, other than moisture, by contact...

131291, 131300, 131302, 131304, 131309, A24B 318

Patent

active

060679948

ABSTRACT:
Processes and apparatus are provided for processing tobacco for expansion thereof including process and apparatus for forming a batch of tobacco for delivery to a tobacco impregnation apparatus and processes and apparatus for unloading the expanded tobacco and purging expansion agent from the expanded tobacco. The tobacco batch forming and feeding system forms and feeds tobacco batches of predetermined weight which can be readily changed to accommodate different types of tobacco. Expanded tobacco is unloaded directly into an unloading chamber wherein expansion agent is purged from the expanded tobacco. The tobacco unloading chamber includes a purge gas circulation system for circulating the purge gas through the expanded tobacco in the lower portion of the unloading chamber and removing the released expansion agent from an upper portion of the unloading chamber. The purge gas is circulated at a predetermined flow rate which is sufficient to remove substantially all of the expansion agent in a time of less than 30 seconds, but which is less than the terminal velocity of the tobacco.

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