Foods and beverages: apparatus – Beverage – Infusors
Patent
1996-07-12
1998-08-18
Alexander, Reginald L.
Foods and beverages: apparatus
Beverage
Infusors
99302R, A47J 3140, A47J 3106
Patent
active
057945195
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a brewing head of an espresso machine to be loaded with coffee portion capsules, the machine having a lower brewing head part and an upper brewing head part that can be pivoted relative thereto, the two parts forming between themselves a receptacle for one of the coffee portion capsules, with a hot-water conduit being configured in the upper part which branches into a plurality of hollow needles with which the film forming the top side of the capsule can be penetrated so that the hot water can flow through the interior of the capsule to its underside, where the hot water, with dissolved coffee components, leaves the capsule via openings punched into the film by inwardly-pointing tips of a pyramid plate as soon as the water pressure exceeds the film's resistance to tearing, and subsequently exits the brewing head through discharge holes in the pyramid plate and a collection conduit.
European Patent Application 93 914 582.7 describes an apparatus of this type for preparing hot beverages, particularly espresso coffee, in which the ground coffee is located in a capsule formed by two spherical pieces of film welded together to be pressure-tight.
The capsule is inserted into a special apparatus, a two-part brewing head that can pivot outwardly. The outwardly-pivotable upper part of the brewing head has on its inside a plurality of needle tips that are provided with bores and lateral exit holes for water supply. The bottom part of the brewing head is equipped on its inside with a plurality of truncated pyramids that are separated from each other by conduits provided with discharge bores which penetrate the bottom part.
When the brewing head is closed, the needle tips penetrate the upper spherical piece of film forming the capsule. At the same time, the upper part of the brewing head presses the capsule onto the truncated pyramids.
The closing of the brewing head also causes the welded collar of the two pieces of foil of the capsule to be clamped between the bottom part and top part such that brewing water entering the capsule by way of the needles can only flow through the capsule, not around it.
This causes the water, which is under high pressure (10 to 15 bar), to press the underside of the capsule securely into the truncated pyramid geometry. If the film's resistance to tearing is exceeded, the capsule tears at the edges of the truncated pyramids, and the brewing water, with the dissolved coffee components, flows by way of the bottom conduits and the discharge holes into the collection vessel located beneath the brewing head.
The time between the entrance of the brewing water and the tearing of the capsule is critical for the quality of the espresso and, most importantly, for the formation of the cream typical of espresso, and is therefore essential to the above-described invention.
This apparatus has the following advantages: stored aroma-tight for an extended period of time or be available for use. cream.
However, in the above embodiment, this apparatus also has various disadvantages: head is not thermally connected to the hot water generator, a consequence of which is that it is heated by brewing water during the brewing process, which leads to a drop in the water temperature, that is, the brewing temperature, and therefore to a decrease in the quality of the brew. used capsule remains hanging on the needles of the pivoted-out upper brewing head part, and impedes the removal to be undertaken manually.
SUMMARY OF THE INVENTION
The object of the invention is therefore to provide means with which the used portion capsules can be ejected from the brewing head and possibly disposed of, and to ensure, with suitable means, that the espresso brewed with the first portion capsule, that is, when the brewing head, particularly the upper part, is at room temperature, is already of outstanding quality.
To accomplish the first partial object mentioned above, the invention is characterized by the provision of an ejector in the upper part of the brewing head that eje
REFERENCES:
patent: 2968560 (1961-01-01), Goros
patent: 3295998 (1967-01-01), Goros
patent: 3403617 (1968-10-01), Lampe
patent: 3470812 (1969-10-01), Levinson
patent: 3824913 (1974-07-01), Herman et al.
patent: 5649472 (1997-07-01), Fond et al.
Alexander Reginald L.
Eugster Frismag AG
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