A - Human Necessities – 47 – J
Patent
A - Human Necessities
47
J
A47J 31/06 (2006.01) A47J 31/36 (2006.01)
Patent
CA 2181246
The invention is directed to a cup-shaped permanent filter element (25) for a domestic espresso maker, which receives the espresso grounds in a brewing chamber (28). The cup-shaped permanent filter element (25) has at its bottom a sieve-type filter base plate (1) provided with filter perforations (4), and is insertable into a filter basket holder (15) from which the espresso beverage is allowed to be discharged through the filter perforations (4). The cup-shaped permanent filter element (25) includes a supporting plate (2) mounted downstream of the filter base plate (1) as seen when looking in the direction of flow (A) of the espresso beverage, the supporting plate combining with the filter base plate (1) to form a pressure chamber (8) for the purpose of improving the production of crema. The espresso bev- erage is required to flow through the pressure chamber (8) before it is allowed to exit on the filter basket holder (15), with the generation of pressure in the pressure chamber (8) be- ing effected by a means (11) mounted on the pressure chamber outlet and operating to increase the flow resistance. The pressure chamber (8) and the permanent filter element (25) are firmly connected with each other mechanically. The means (11) for the generation of pressure is comprised of one or several apertures whose overall cross-section is sufficiently small relative to the overall cross-section of the filter perforations (4) in the filter base plate (1) of the permanent filter element (25) to produce a pressure drop in the aperture(s) (11) suffi- cient for the production of crema. This results in a one-piece construction of the permanent filter element (25) which affords ease of handling and with which good crema results are obtained.
Une cartouche filtrante durable (25) en forme de pot pour recevoir le café moulu dans la chambre d'infusion (28) d'une machine à café express domestique a pour fond une plaque filtrante de base (1) en forme de crible avec des trous de criblage (4) et peut être placée dans un support (15) de crible. Le café express peut s'écouler à travers les trous de criblage (4) du support (15) de crible. La cartouche filtrante durable en forme de pot (25) comprend une plaque de support (2) montée en aval de la plaque filtrante de base (1), dans le sens d'écoulement (A) du café express, et qui forme avec la plaque filtrante de base (1) une chambre de compression (8), ce qui permet d'améliorer la génération d'écume. Le café express doit traverser la chambre de compression (8) avant de s'écouler dans le support (15) du crible. La pression est générée dans la chambre de compression (8) par un élément (11) monté à sa sortie qui augmente la résistance à l'écoulement. La chambre de compression (8) et la cartouche filtrante durable (25) sont mécaniquement assujetties l'une à l'autre. L'élément de génération de pression (11) comprend un ou plusieurs orifices dont la section transversale totale est suffisamment réduite par rapport à la section transversale totale des trous de criblage (4) de la plaque filtrante de base (1) de la cartouche filtrante durable (25) pour assurer une chute de pression suffisante dans les orifices (11) pour former de l'écume. On obtient ainsi une cartouche filtrante durable (25) en une seule pièce facile à manipuler qui permet de préparer du café express avec une bonne quantité d'écume.
Gasser Ruedy
Miltenberger Christof
Schamberg Stefan
Stumvoll Ernst
Braun Aktiengesellschaft
Macrae & Co.
Maxs Ag
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