MXPA01000809A - Filtering device for an espresso-type coffeemaker - Google Patents

Abstract

A filtering device for an espresso-type coffeemaker of the type having a spout to deliver heated water under pressure and a receptacle to receive brewed filtered coffee having a permanent filter in the path of heated coffee passing to the receptacle and at least one layer of a paper filter in the path of the heated coffee passing to the receptacle that captures lipids and grounds from the brewed coffee.

Description

FILTRATION DEVICE FOR AN EXPRESS-TYPE COFFEE MACHINE FIELD OF THE INVENTION The invention relates to filtration devices for an express type coffee machine and methods for making coffee with lower lipid content in an express coffee machine.

BACKGROUND OF THE INVENTION Express coffee makers are well known. Generally, espresso coffee machines supply hot water having an optimum temperature of approximately 96 ° C through very finely ground coffee in a permanent filtering container, generally a metal filtering container, using a driving pressure of 3 to 15 bar. Examples of express type coffee machines are described and represented in U.S. Patent Nos. 5,280,747; 5,392,694; 4,882,982 and 5,150,645. The current technology in express filtration provides a finely fenestrated permanent filter that is commonly metallic, on which the crushed coffee is located in particle size of 0.3 millimeters or less. These filtering functions intercept most of the crushed coffee while allowing the beverage of the coffee liquid to pass with its oils and some fine crushed particles at the receiving rate. Although this filtration of particulate matter (crushed), until Now, it has been considered in the world as "state of the art", recent tests have shown that the fraction of lipids (coffee oils) as well as the fine particles of ground coffee that escape filtration in this system described above, are actually harmful to the human organism. The components cafestol and ahweol ("C" and "K" in this), present in coffee oils in the fine particles of ground coffee (escape the metallic filtration, see above) have been extensively studied by medical researchers and They have conclusively shown substantially elevated serum cholesterol, triglycerides and liver function tests. See, for example, P. Zock, M.B. katan, M.P. Merkus, et al., Effect of a Lipid-Rich Fraction from Boiled Coffee on Cholesterol Serum, Lancet 1990; 335: 1235-7, H. Heckers, U. Gobel & or. Kleppel, End of the Coffee Mystery: Di terpene Alcohols Raise Low-Density Serum and Lipoprotein Cholesterol and triglyceride Levéis, Journal of Infernal Medicine, (J. Int. Med.) 1994; 235: 192-3; R. Urgert, A. G.M. Schultz & M.B. Katan, Effeets of Cafestol and Kahweal from Coffee Ground, Serum Lipids and Serum, Liver Enzymes in Humans, American Journal of Clinical Nutrition (AM, Clin. Nutr.) 1995; 61: 149-54, W. Weusten-Van Der oy et al., Identity of the Cholesterol-Raising Factor From Boiled Coffee and i ts Effeets on Liver Functions Enzymes, Journal of Lipid Research (J. Lipid, Res.) 1994; 35: 721 -33; E. Arnesen, N.E. Huseby, T. Brenn & K. Try, The Tromso Heart Study, Distribution of and Determinants for, Garnma-Glutamyl Transferase in a Free Living Population, Scandinavian Journal of Clinical Laboratory Investigation, (Scand J. Clin. Lab. Invest,) 1986; 46:63 - 70; Or, Nelssen, D.H. Forde, & T. Brenn, The Tromso Study, Distribution and Population Determination of Gamma-Glutamyl Transferase, American Journal of Epidemiology (AM J. Epidemiol.) 1990; 132: 318-26; Ulmann's Encyclopedia of Industrial Chemistry - 5th Edition, 1986; Vol. A7: pg. 334; M. Van Desseldorp et al., Cholesterol-Raising Factor from Boiled Coffee does not Pass Paper Filter, Arteriosclerosis and Thrombosis 1 991; 11: 586-93.

Approximately 18% of Arab coffee (seed) is lipid (oil). Of that 18%, 20% is composed of fatty acid esters of the dipertenal alcohols known as cafestol and kahweol. The aforementioned article Zock et al., Show that the lipid-rich (oil) floats on the surface of the boiled coffee by raising serum LDL-C cholesterol and triglyceride serums (both atherogenic) by 29% and 55% respectively. The article Heckers, et al., Mentioned above found that the subjects are given 148 mg of C and K daily for a month. 50% increase in LDL-C serum and 87% increase in serum triglyceride. A double express (approximately 30 ce) can contain up to 24 mg of C and K in a single cup, (in addition, the express fermentation method was shown by Urgert, et al., In the Journal of Agricul tural and Food Chemistry, August 1995, because it is the most effective to extract the harmful compounds C and K, when compared to other methods of fermentation, for example dripping vs. Boiling vs. Precolation and similar). The article cited above by Urgert et al. Confirms these results, but the studies described there are based on the C and K found in the crushed particles found in the bottom of the coffee cup. It was found that the crushed particles that escape filtration are potent transporters of C and K and in addition they were found to raise cholesterol and triglycerides C and K to elevate the serum of liver enzymes ALT (alanine aminotransferase) and serum AST (aminotransferase aspartate) lesser degree. These liver enzymes, when elevated, can indicate dysfunction and / or hepatocellular damage (liver). Other research confirms the adverse effects of C and K on liver function. See, for example, the cited reference Urgert et al., Eusten-Van Der ouw et al., Amesen et al., And Nilssen et al. This evidence clearly establishes the need for a filtration that can release an espresso beverage from its harmful oils and unfiltered waste, which is what the invention can complement. It has been found that coffee paper filters can substantially remove C and K in coffee beverages by filtering the oils and small crushed particles that have been found to contain C and K. See the cited papers Urgert et al., and Van Desseldorp et al. Prior to the invention, paper filters have not been developed for express type coffee machines since they appear to be redundant to the metallic or other permanent filter, or felt paper filters were not suitable for use in high pressure environments of coffee makers. of express type.

COMPENDIUM OF THE INVENTION A principal feature of the invention is the provision of an improved filtering device for an express type coffee machine. The espresso machine is of the type that has a spout or ducts to supply hot water under pressure and a receptacle to receive the filtered fermented coffee. The filtering device has a permanent filter in the path of the hot coffee going to the receptacle. In accordance with the invention, the paper filter in the flow path of the fermented coffee liquid that removes a substantial part of the coffee oils and crushed particles that escape filtration through the permanent filter. These substances contain cafestol and kahewol therefore, these substances are not desirable, at least partially, removed from the fermented coffee liquid. Furthermore, an advantage of the invention is that the filtration device of the invention substantially prevents, in the consumers of its treated coffee, the elevation of serum LDL cholesterol, liver enzymes (ALT) and triglycerides, all of these potentially dangerous. Yet another advantage of the invention is that the removal of bitter coffee oils, often rancid and residues can improve the taste of the coffee beverage. Still another feature of the invention is that the paper filter may have a plurality of layers to increase the removal of coffee seed oils and fine coffee residues. These layers are preferably folded together approximately the perimeter of the filter to both increase the stiffness of the disposable filter and make it easier to handle and use. Another advantage of the invention is that it is easy to use and clean. The paper filter fits quickly and easily inside the container container and on the metal filter or existing permanent. After the crushed coffee is exhausted, a tap on the container container is held upside down on a reject container, sends the load of ground coffee with the paper filter (which forms a cake) inside the reject container, without That there remain residues in the container, which is not infrequent the case when a paper filter is not used. In addition, features and advantages will be completely more evident in the following description of the embodiments of the invention and the attached clauses. The invention, together with other advantages and features thereof, can be better understood by reference to the following description taken in connection with the accompanying drawings, in some figures of which like reference numbers identify like elements.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an elevational view, partly in section of an express type coffee machine incorporating the principles of the invention. Figure 2 is a perspective view of a part of the apparatus of Figure 1, naming a disposable filter made in accordance with the principles of the invention. Figure 3 is a perspective view with parts removed to show internal parts, part of the coffee maker express type of figure 1, illustrating the position of the filter of figure 2 within it.

DESCRIPTION OF THE PREFERRED MODALITIES With reference to Figure 1, an express type 9 coffee machine is generally designed, with a filtering device, 10 generally designed. The coffee machine 9 is of the type that supplies hot water under pressure through ducts 12, after the heated water passes through the ground coffee seed CT in the filtering device to a receptacle 14, such as a cup that receives the heated coffee . The filtering device 10 has a container 16, which receives a perforated permanent filter, generally a metal filter 18, of a type known in express type makers. The container 16 can have a rubber ring 20 for sealingly fitting against an external surface of the metal filter 18 and ensuring that the hot water is pumped under pressure through the CT coffee and filters. The container 16 has a conical chamber 22 below the metal filter 18 communicating with a conduit 26, then the receptacle 14. According to the invention, a paper filter 30 is removably placed on the top of the metal filter 18 between the crushed coffee CT and the metal filter 18. The paper filters can be of the type sold on the registered trademark MR. COFFEE for conventional (non-pressurized) type coffee makers and filters can be cut to size to fit the base of the metal filter 18. In a preferred form, the filter 30 can be made from a plurality of layers of paper layers such as two layers 31, 32 shown in figure 3, each of the layers is of a conventional thickness for non-express coffee filters. These layers are folded together approximately at their perimeter as indicated at 34. These form a disposable, multi-layer, easy to handle filtration unit. In addition, the ground coffee CT is filtered by the metal filter 18 and the fermented coffee is also filtered by the paper filter 30 to remove the harmful lipids and coffee residues that can effect an elevation in the cholesterol levels in a coffee user. fermented. The modified paper filter 30 of the type sold under the trademark is preferably placed directly on the metal filter 18, and the seeds of ground coffee CT are placed directly on the paper filter. A prototype filtration device of the invention was constructed, tested and proved to be effective. The prototype was measured and shaped to fit the express container of a Rancilio® trademark machine, Model No. MISS 935624, made by Rancilio of Italy. In addition, it was approximately circular in shape with a diameter of approximately 5 cm (which, surely, may be suitable to fit in any container container size) and formed of two layers of standard filter paper derived from a variety of cone filters . It was as a consequence, to double the standard thickness of conventional coffee filters. Some tests were made on the filtration device 10 as follows. First, to determine the amount of oil in the fermented coffee without using the paper filter, some coffee is fermented and cooled in a refrigerator for 2 to 3 hours to allow the oils to rise to the surface of the liquid air interface . Copious amounts of lipids were found on unfiltered coffee. Otherwise, about 80% or less lipids were found from a coffee that was filtered by a paper filter layer 30, while approximately 95% of the coffee lipids were removed when two layers of the paper filter 30 were used. Insignificant amounts of fine particles of ground coffee were noted in the bottom of the cup when one or two layers of filter paper were used compared to none. These observations are in agreement with other studies carried out, such as those previously mentioned in the articles by Urgert et al., And Van Desseldorp et al. Now it should be clear that an espresso machine has been described that is easy to clean and use. The filter fits quickly and easily inside the container container on top of the pre-existing permanent filter. After the crushed coffee is exhausted, a tap on the container container held upside down on a reject container sends the crushed coffee load with the paper filter (forming a cake) into the reject container, leaving no residue in the container. the recipient. The above detailed description is only for clarity of understanding and should not be understood as unnecessary limitations of this, there may be apparent modifications within the scope of the invention to those skilled in the art.

Claims (1)

1. CLAIMS A filtration device for an express type coffee machine of the type having a spout for supplying hot water under high pressure for finely ground coffee seeds for fermenting coffee from this and a receptacle for receiving the filtered fermented coffee, by defining a flow path between finely crushed seeds to the receptacle, consisting of: a permanent filter in the heated coffee path going to the receptacle with the filter having an opening size to filter the fine crushed espresso; and at least one layer of paper filter in the path of the heated coffee that passes to the receptacle. The device of claim 1, wherein the permanent filter is a metal filter. The device of claim 1 or 2, wherein the paper filter has a plurality of layers. The device of claim 3, wherein the paper filter layers are glued together to form an easy to handle unit. In an express type coffee machine of the type that supplies hot water under pressure to a container in which fine-crushed coffee seeds are present and from which the fermented coffee is removed through a permanent filter, the improvement of a disposable paper filter through the flow of the fermented coffee path, the paper filter being of a thickness and size to be effectively removable and trap lipids and fine residues of the fermented coffee and to reduce the lipids in the fermented coffee and where the paper filter is sized and shaped to fit over and adjacent to the top of the permanent filter between the filter and the finely ground coffee and the finely ground coffee is placed on top and on the paper filter so that the paper filter also helps to remove, in a single operation, the waste used as well as the paper filter from the coffee maker. The express coffee machine of claim 5, wherein the heated water is under a pressure of at least 3 bars. The espresso coffee machine of claim 5, wherein the heated water is under pressure from 3 to 15 bar. The espresso machine of claim 5, 6 or 7 wherein the paper filter is of such thickness and size as to effectively remove and trap lipids and fine crushed particles of fermented coffee as to remove at least 50% of the lipids that must be present absent the paper filter. 9. The espresso coffee machine of claim 5, 6 or 7 wherein the paper filter is of such thickness and size as to effectively remove and trap fine crushed lipids and particles from fermented coffee to remove at least 95% of the lipids that must be present absent the paper filter. 10. The express coffee machine of claim 5, 6, 7, 8 or 9, wherein the paper filter is made of at least two paper filter layers of standard thickness for coffee. 11. The espresso coffee machine of claim 5, 6, 7, 8, 9 or 10, wherein the finely ground coffee has residues of 0.3 mm or less in particle size. 12. The method of making fermented coffee liquid with low lipid content in an express coffee machine of the type that makes coffee liquid passed through hot water under pressure through crushed coffee seeds finely maintained on top of a permanent filter comprising the steps of: the placement of disposable paper coffee filter material of the type that can absorb lipids and of the size and shape to cover the permanent filter in the coffee pot above and covering the permanent filter; placing the finely ground coffee seeds on top of the filter paper for coffee paper; and sequentially passing hot water at an elevated pressure through the coffee seeds and through the paper filter material and permanent filter to create fermented coffee liquid and to allow the lipids of this to be absorbed by the filter material of paper to make a coffee liquid with low lipid content. 13. The method of claim 12, where the heated water is under a pressure of at least 3 bars. 14. The method of claim 12, wherein the heated water is under a pressure of at least 3 to 15 bar. The method of claim 12 or 14, wherein the paper filter is of such thickness and size to effectively remove and trap lipids and fine particle residues from the fermented coffee as well as to remove at least 50% of the lipids that must be removed. be present absent the paper filter. 16. The coffeemaker method of claim 12, 13 14 or 15, wherein the paper filter is of such thickness and size as to effectively remove and trap fine crushed lipids and particles from the fermented coffee as to remove approximately 95% of the lipids that must be present absent the paper filter. 17. The espresso machine of claim 12, 13, 14, 15 or 16, wherein the coffee paper filter is made of at least two paper filter layers of standard thickness. 18. The express coffee machine of claim 12, 13, 14, 15, 16 or 17 wherein the finely ground coffee has residues of 0.3 mm or less in particle size. 19. In a method of making fermented coffee liquid with low lipid content in an express type coffee machine of the type having a spout to supply water heated under high pressure to finely ground coffee beans for fermenting coffee therefrom and a receptacle for receiving coffee fermented coffee and having an undefined coffee flow between seeds finely ground to the receptacle including a permanent filter on the road and characterized by the steps of: placing at least one layer of paper filter on the road; and sequentially passing water heated under pressure through the finely ground coffee seeds, by at least one filter paper layer and permanent filter to the receptacle. 20. The method of claim 19, wherein the filter permanent is a metal filter. The method of claim 19 or 20, wherein the paper filter has a plurality of layers. The method of claim 21, wherein the paper filter layers are folded together to form a user-friendly unit.