| 摘要 |
<p>A method for forming a consumable extract from a solid raw material such as roasted coffee comprises (a) filling an extraction vessel (11) with a quantity of solid raw material to form a bed of said material, (b) closing the at least one outlet line (23) from the vessel and filling said vessel with a predetermined volume of liquid solvent such as hot water, (c) pressurising the internal volume (75) of the vessel to a predetermined and controllable pressure by supplying a fluid under pressure from a source of pressurised fluid (41) external to the vessel, (d) maintaining the pressure in the vessel under non-flow conditions for a predetermined and controllable period of time, and (e) opening an outlet line to collect a consumable extract from the vessel.</p> |
