| 摘要 |
An extraction means for the producing of coffee for a coffee machine is equipped with a brewing cylinder ( 2 ) for the receiving of coffee powder, whereby the same is reciprocably adjustable between pre-determined positions in its axis direction in co-operation with a drive means ( 4 ). Two pistons ( 31, 32 ) coaxially adjustable relative to one another are located in this brewing cylinder ( 2 ). The brewing cylinder ( 2 ) incorporates a cylinder section ( 20 ), and an additional part ( 22 ) is also envisaged. The additional part ( 22 ) is moveably located at the end of the brewing cylinder ( 2 ) that can be closed by the first piston ( 31 ) and equipped with a filler opening ( 24 ) for the insertion of the coffee powder. In this way the construction length of the extraction means can be shortened.
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