Foods and beverages: apparatus – Cereal-puffing
Patent
1998-09-30
2000-01-11
Alexander, Reginald L.
Foods and beverages: apparatus
Cereal-puffing
99299, 99302R, A47G 1914
Patent
active
060123796
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a filter holder, which is intended to be mounted on an espresso coffee machine and which contains a pan, suitable for receiving a filter, which is intended to contain a measure of ground coffee, said pan having a perforated bottom, a body arranged in the pan below the filter, which is provided with at least one distribution funnel, the lower end of which extends through the bottom of the pan, an infusion collection chamber formed between the bottom of the filter and the upper surface of the body and opening into an output strainer for the infusion, the mouth of which communicates with said funnel, permitting the infusion to run toward the pan, as well as a device for the making of foam.
BACKGROUND OF THE INVENTION
In a known filter holder of this type, used in an espresso machine, bringing hot water to the ground coffee contained in the filter at a pressure of 10 to 15 bars, the production of foam in the infusion leaving the filter is achieved by passing the infusion through an over-pressure valve installed on the upper face of the body, and making the mouth of the infusion output strainer communicate with the distribution funnel. However, such an over-pressure valve is an expensive component and its installation on the upper surface of the body is difficult to achieve.
OBJECT OF THE INVENTION
The main purpose of the invention is to remedy these defects and to achieve a filter holder of the type described above, which is equipped in a simple and lower-cost manner with a device making it possible to produce abundant, thick foam from the infusion.
SUMMARY OF THE INVENTION
According to the invention, the strainer extends in an annular form around a boss formed in the upper surface of the body, and the device for the making of foam has an annular elastic gasket placed around the boss, so as to obstruct the outflow from the strainer, said gasket being deformable by expansion under the effect of the pressure present in the collecting chamber in such a manner, so as to form at least one passage, which places said output in communication with the funnel, permitting the flow of the infusion.
Thus, this annular gasket, which is deformable elastically by expansion, constitutes a simple means to make it possible to obtain, as a result of its expansion, an air-infusion mix sufficiently large to create a thick foam in the coffee obtained. Furthermore, this gasket is inexpensive and is perfectly adapted to manufacturing these filter holders on a large scale.
According to another advantageous characteristic of the invention, the body includes two funnels, arranged symmetrically on each side of the boss, and the filter holder also contains an annular distribution chamber, concentric with the gasket, containing two orifices, which discharge respectively into the two funnels and which is provided with chambers surrounding, on the one hand, only the periphery of the gasket, so as to leave free the peripheral sectors of the gasket, which are diametrically opposed, which extend in a plane perpendicular to that passing through the upper ends of the two funnels and which are intended to be deformed by expansion so as to form two passages opening into the distribution chamber and allowing the infusion, which is distributed equally, to flow into the two funnels via said orifices.
Thus, during the preparation of two cups of coffee placed below the two funnels, one obtains, as a result of the particular arrangement of the two passages for the infusion, with respect to the two funnels, the same flow of coffee through the two funnels and, therefore, the same quantity of coffee in each of the two cups.
BRIEF DESCRIPTION OF THE DRAWING
The characteristics and advantages of the invention are shown primarily in the description, which will follow as an non-limiting example, referring to the attached drawings in which:
FIG. 1 is a vertical section of an inventive filter holder showing the filter holder before the addition of hot water;
FIG. 2 is a partial view from above of a body
REFERENCES:
patent: 5150645 (1992-09-01), Schiettecatte
patent: 5473973 (1995-12-01), Cortese
patent: 5634394 (1997-06-01), Cortese
Alexander Reginald L.
Robert Krups GmbH & Co. KG
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