COFFEE MACHINE

摘要

1. Coffee machine having a brewing chamber (7, 7', 40) which has a hot water inlet with a distribution filter (10, 43) and a drink outlet, located opposite the hot water inlet, with a brewing filter (13, 44), and having piston (14, 49), which is displaceable in the brewing chamber (7, 7', 40) transversely to the direction or flow of the hot water and is provided with a limiting surface (15, 15', 47) of the brewing chamber (7, 7', 40), it being possible for ground coffee to be metered automatically into the brewing chamber (7, 7', 40), characterized in that, when different amounts of ground coffee are metered in for brewing batches of coffee of different sizes, the limiting surface (15, 15', 47) of the piston (14, 49) can be pushed to a different extent into the brewing chamber (7, 7', 40) such that, with the different quantities of ground coffee the thickness of the layer of ground coffee is essentially constant in the direction of flow of the hot water, in that the brewing filter (13, 44) and the distribution filter (10, 43) are arranged with a spacing from one another which is essentially constant over the cross section of the brewing chamber (7, 7', 40) and corresponds to the thickness of the layer of ground coffee, and in that a side wall (49b) of the piston (14, 49) is constructed as a covering slide to cover the unrequired filter openings of the brewing filter (13, 44) or of the distribution filter (10, 43).