Importance

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Abstract

In a brewing head of an espresso machine including a pressure-tightly closable brewing compartment which comprises an inlet for hot water, a filling opening for fresh coffee powder and an outlet for freshly brewed espresso, a leached-out coffee powder cake (69) is lifted, after a brewing process, by means of a force-controlled lifting piston (4, 4a) disposed in the brewing compartment up to an upper edge of the peripheral wall. From that position, the coffee powder cake (69) is laterally removed by a scraper (36). The scraper (36) is associated with a carriage (19) which can be moved along a glide face (41) above an opening of the brewing chamber and which has a seal by which, in a work position of carriage (19), the opening of the brewing chamber can be sealed. In order to obtain a reliable and wear resistant seal of the brewing compartment with a flat brewing head, a brewing compartment sleeve (3) forming the peripheral wall of the brewing compartment and substantially movable perpendicularly to the plane of the glide face (41) is force-controlledly moved, in the working position of carriage (19), through the plane of glide face (41) into a sealing position at which the brewing compartment is sealed by means of the seal. After a brewing process, it is moved back from the plane of glide face (41) into a rest position so that carriage (19) can be moved into a start position next to the brewing compartment.

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First Claim