Process for expanding tobacco

Details Process for expanding tobacco Process for expanding tobacco

1975-06-05

1976-09-28

Michell, Robert W.

Tobacco

Cigar or cigarette making

Tobacco feeding

A24B 318

Patent

active

039825507

ABSTRACT:
This disclosure relates to a process for expanding tobacco which comprises the steps of (1) subjecting tobacco, preferably in cut or particulate form, to a vacuum, (2) contacting the tobacco, while under vacuum, with water, preferably as a mist or spray, to impregnate the tobacco with water, (3) freezing the water-impregnated tobacco while it is maintained under vacuum, and (4) rapidly heating the frozen water-impregnated tobacco, preferably by direct contact with superheated steam. The first three steps may be, and preferably are, conducted in the same chamber. The fourth step may be conducted in a heating or drying chamber or tower, in a cyclone dryer or in similar equipment which will provide good gas-particle contact.

REFERENCES:
patent: 3131700 (1964-05-01), Radwan
patent: 3710803 (1973-01-01), Johnson
patent: 3749103 (1973-07-01), Abbot et al.
"Freeze-Drying Foodstuffs" edited by Cotson and Smith, Based on A Symposium at the Borough Polytechnic London, May 15, 1964.

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