Tobacco expansion process and apparatus

Details Tobacco expansion process and apparatus Tobacco expansion process and apparatus

A - Human Necessities

24

B

A24B 3/18 (2006.01)

Patent

CA 2204705

An apparatus for impregnating tobacco with an expansion agent includes a chamber for confining a charge of tobacco under elevated pressure conditions. An accumulator connected to the chamber maintains a supply of an expansion agent in fluid form under conditions of elevated temperature and pressure but less than the desired tobacco impregnation temperature and pressure. The expansion agent is forcibly and rapidly moved from the accumulator and introduced into the chamber under conditions such that the pressure and temperature of the expansion agent are increased to the desired impregnation temperature and pressure, preferably including a pressure approaching or above the supercritical pressure thereof.

Appareil servant à imprégner le tabac d'un agent d'expansion. Il est constitué d'un compartiment destiné à confiner une charge de tabac dans des conditions de pression élevée. Un accumulateur relié au compartiment conserve une réserve d'agent d'expansion sous forme fluide dans des conditions de température et de pression élevées, mais inférieures aux température et pression désirées d'imprégnation du tabac. L'agent d'expansion est acheminé avec force et rapidité depuis l'accumulateur, et est introduit dans le compartiment dans des conditions telles que la pression et la température de l'agent d'expansion sont augmentées pour atteindre la température et la pression d'imprégnation désirées. De préférence, le niveau de pression se rapproche du niveau de pression supercritique ou le dépasse.

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