| 摘要 |
An apparatus for the preparation of hot beverages by brewing a water-extractable particulate substance includes a delivery pump ( 5 ), water heater ( 6 ), brewing area ( 36 ) and beverage outlet ( 7 ). The apparatus comprises a delivery member in the form of a screw shaft ( 10 ) provided with at least one flight ( 13 ) by means of which the particulate substance is delivered into and out of the brewing area ( 36 ) in one and the same direction. An extraction area (37 ) is provided downstream of the brewing area ( 36 ) in which the substance is compacted by the screw shaft ( 10 ) and thereby the essence of the substance extracted or the substance is additionally extracted. This is achieved by the pitch of the flights (13 ) in the region of the extraction zone ( 25 ) being smaller than in the region of the brewing zone ( 24 ).
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