METHOD OF AND APPARATUS FOR EXPANDING TOBACCO

A method of and an apparatus for expanding tobacco, particularly tobacco impregnated with solid carbon dioxide are disclosed. The apparatus comprises an arcuate, generally C-shaped duct for conveying the tobacco material in a hot gaseous medium to sublimate the solid carbon dioxide and expand the to...

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Bibliographic Details
Main Authors LAURENCE, RICKY HARRIS, GUY, KEITH ROWAN, STEWART, TONY DEAN, POINDEXTER, DALE BOWMAN, BEARD, HOYT STURDIVANT, BARNES, RUSSELL DEAN, WILHELM, DOUGLAS EDWIN, RICHARDSON, HAROLD EUGENE
Format Patent
LanguageEnglish
French
Published 31.10.2000
Edition6
Subjects
CIGARETTES
CIGARS
HUMAN NECESSITIES
MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ORCHEWING
SMOKERS' REQUISITES
SNUFF
TOBACCO
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Summary:A method of and an apparatus for expanding tobacco, particularly tobacco impregnated with solid carbon dioxide are disclosed. The apparatus comprises an arcuate, generally C-shaped duct for conveying the tobacco material in a hot gaseous medium to sublimate the solid carbon dioxide and expand the tobacco. The duct has a non-circular cross-section, preferably a rectangular cross-section, with a high width-to-depth ratio and an increasing depth from the inlet to an intermediate portion of the duct then a decreasing depth from the intermediate portion to the outlet of the duct. A winnower device infeeds the tobacco material into the duct adjacent the throat of a venturi section connected to the inlet of the conveying duct. A tangential separator with an adjustable baffle at the inlet thereof for controlling velocity in the separator is used to separate the expanded tobacco from the gaseous medium.
Bibliography:Application Number: CA19972212652