Method and apparatus for the volume expansion of tobacco

Details Method and apparatus for the volume expansion of tobacco Method and apparatus for the volume expansion of tobacco

1982-09-13

1987-03-03

Millin, V.

Tobacco

Tobacco treatment

Puffing

A24B 318

Patent

active

046467602

ABSTRACT:
A method and apparatus for carrying out the volume-expansion (puffing) of disintegrated tobacco, wherein said tobacco is impregnated with an impregnating medium containing water and/or orthophosphoric acid and/or the sodium or ammonium salts thereof and/or ammonium sulphate to an initial moisture content of at least about 35% by weight, and is then reduced to a final moisture content of about 10-13% by weight with the aid of a heating medium containing gaseous water vapor, the overall duration of the method being at least about 10 seconds. The method according to the invention is carried out as a continuous two-step process including a first process step during which the impregnated tobacco's moisture content is reduced by about 5% to about 60% of its initial moisture content under standard puffing conditions, and a second less severe process step, during which the tobacco is subjected to a flow of heating medium and/or mechanically conveyed under moderated process conditions as compared to the puffing conditions, and at a lower temperature, to attain a final moisture content of about 10% to 13% by weight.

REFERENCES:
patent: 4044780 (1977-08-01), Kelly

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