| 摘要 |
PCT No. PCT/JP88/00750 Sec. 371 Date Mar. 23, 1989 Sec. 102(e) Date Mar. 23, 1989 PCT Filed Jul. 27, 1988 PCT Pub. No. WO89/00821 PCT Pub. Date Feb. 9, 1989.An expanding apparatus of this invention includes a preparatory vessel that is supplied with material of agricultural origin, for example, tobacco material. The tobacco material in the preparatory vessel is supplied to an impregnation vessel through a convey pipe. Carbon dioxide having an impregnation pressure is supplied to the impregnation vessel so as to fill the same. A booster mechanism is associated with the convey pipe to increase the pressure of carbon dioxide around the tobacco material to a pressure substantially equal to the impregnation pressure in the impregnation vessel when the tobacco material is supplied from the preparatory vessel to the impregnation vessel. The tobacco material impregnated in the impregnation vessel is discharged to a blow pipe through a delivery pipe and is expanded by means of a heating medium generated in the blow pipe. A debooster mechanism is associated with the delivery pipe to reduce the pressure of carbon dioxide around the tobacco material to a pressure substantially equal to the pressure in the blow pipe when the impregnated material is discharged from the impregnation vessel to the blow pipe.
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