Foods and beverages: apparatus – Beverage – Infusors
Patent
1994-03-11
1995-10-24
Jenkins, Robert W.
Foods and beverages: apparatus
Beverage
Infusors
99306, A47J 3100
Patent
active
054600782
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a beverage brewing machine in which cold water can be heated by an electric heating unit and flows as brewing water onto the upper surface of a product, preferably ground coffee or tea leaves, contained in a filter insert which is permeable for the brewed beverage and, in turn, is inserted into the receiving chamber of a brewing unit, from which after extraction of the product the so prepared brewed beverage finally dispenses into a storing tank, while brewing water can propagate into the storing tank also along another path than along the upper surface of the product.
A beverage brewing machine of this kind is already known from U.S. Pat. No. 4,064,795. In this beverage brewing machine, brewing water flows along the other path directly into the storing tank without getting in contact with the product. By reducing the contact time of the brewing water with the product, it is desired to prevent undesirable coffee materials substantially from extracting from the product so that the brew dispensing in the storing tank contains undesirable solids such as bitter constitutents only to a small extent.
When brewing water in this beverage brewing machine passes into the upper surface of the product, the latter is usually bloated such that the ground coffee ascends the edge of the filter insert already at the beginning of the brewing action. When further brewing water is introduced into the product, this upper fringe area will hardly be reached by the brewing water. This effect is augmented by the brewing water generally exiting from an outlet opening that is arranged relatively centrally onto the upper surface of the product and, consequently, by the effect of gravity, the flow density of the brewing water in the fringe areas is anyway considerably less than in the middle of the product. It ensures from both effects that although the extraction of bitter constituents can be largely avoided, the product is still not made use of sufficiently.
Therefore, the object of the present invention is to provide a beverage brewing machine of the kind referred to which permits to make better use of the product in the brewing action without the portion of bitter constituents in the brew noticeably increasing.
This object is achieved by the present invention in that the filter insert is water-permeable from the outside to the inside, in that the portion of brewing water flowing along the other path is directed in the area of the upper surface of the product to the outside surface of the filter insert and, subsequently, by extracting the product finally reaches the storing tank. Owing to this inventive arrangement, also the upper area of the product is penetrated from the outside by the portion of brewing water flowing along the other path, and is additionally extracted. Since due to the split-up of the brewing water which reaches the brewing unit along two different paths the contact time of the brewing water with the product is shorter now as before, the portion of brewing water flowing along the other path through the product does not either cause extraction of any appreciable undesirable flavours from the product. Namely, without causing undesirable bitter constituents in the brew, the portion of brewing water flowing along the other path accomplishes in addition a better extraction of the product so that the resulting brew contains almost the same concentrate components as if the entire brewing water had passed along the surface of the product.
Tests have shown that if the entire brewing water (8 cups) is introduced through the upper surface of the product being ground coffee (52 gm roughly) (conventional brewing method), approximately 1.35 percentage by weight concentrate and a large portion of bitter constituents result. The brewing water being produced according to the method described in U.S. Pat. No. 4,064,795, with a bypass portion of roughly 25 percent, there result only approximately 1.15 percentage by weight concentrate in the brewed beverage, however, with small portions of bitter co
REFERENCES:
patent: 3793934 (1974-02-01), Martin
patent: 4064795 (1977-12-01), Ackerman
patent: 4448113 (1984-05-01), Brabon
patent: 4920871 (1990-05-01), Anson
Driesen Georges
Herber Peter
Peter Andreas
Schafer Gerhard
Schamberg Stephen
Braun Atkiengesellschaft
Jenkins Robert W.
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