TWI629962B - Brewing filter capable of effectively filtering out water-insoluble particles in the brewing - Google Patents

Abstract

The present invention is a brewing filter capable of effectively filtering out water-insoluble particles in a brewing solution, the brewing filter comprising at least one filter, and the filter is provided with a plurality of first through holes and a plurality of sedimentation tanks. Wherein the first through holes are through the opposite sides of the filter, and the sedimentation grooves are recessed on the inner side of the filter, so that when the user brews the beverage by using the brewing filter, only The powder to be brewed (eg, coffee powder, green tea powder, almond powder, etc.) and the liquid are filled into the filter, and the soup after the powder of the brewed powder and the liquid are mixed, The first through hole is filtered into a container, and the water-insoluble particles or impurities in the soup are precipitated into each of the sedimentation tanks to ensure that the brewed beverage retains a fine mouthfeel.

Description

Brewing filter capable of effectively filtering out water-insoluble particles in the infusion

The invention relates to a filter, in particular to a brewing filter capable of effectively filtering out water-insoluble particles in a brewing solution, and the brewing filter forms a brewing space between the water leakage portion and the loading opening for storage. a powder to be brewed (such as: coffee powder, green tea powder, almond powder, etc.), the hot water is used to wash the powder to be brewed, and evenly mixed into a soup, the soup is uniformly mixed. The juice passes through the first through hole or the second through hole on the filter hole, and is dripped into a container for drinking by the user; on the contrary, the water-insoluble particles or impurities in the soup are brewed. During the standing process, due to gravity, it naturally and gradually precipitates into the sedimentation tank adjacent to each of the first through holes, without the soup passing through the first through holes or the second through holes. Dropping the filter into the container to ensure that the broth from the filter is completely free of particles or impurities dissolved in the water, not only ensuring that the soup has the most authentic and original taste of the brew. It also ensures that it has the best fine mouthfeel.

Press, coffee (English: coffee) is a beverage made from coffee beans that have been roasted. It is one of the most popular beverages in human society. It is also an extremely important economic crop. Its quota for global futures trade. Second only to petroleum, it ranks second in the world. Generally speaking, once the fruit of coffee is ripe, it will go through the procedures of picking, processing, baking, etc., and can be made into a variety of different coffee drinks in a variety of different ways, such as: Espresso, card cloth Chino, latte, etc., usually as a hot drink, or as a cold drink, the original coffee is slightly acidic, and the content of caffeine inside has a stimulating effect on the human body.

In addition, most studies have confirmed and suggested that moderate drinking of coffee is good for your health, especially for healthy adults. In addition, many studies and experiments have shown that coffee is indeed a very healthy drink, rich in antioxidants and nutrients that are good for your health. The following are 13 reasons why people should drink coffee regularly after scientific and human experiments (extracted from a column compiled by "World Magazine" and "Health Magazine"): 1. Coffee makes you energetic and let You are smarter; 2. Helping to burn fat; 3. Greatly improving activity; 4. Enriching essential nutrients (such as riboflavin, vitamin B5, manganese, potassium, magnesium and vitamin B3); The risk of type 2 diabetes; 6. Prevention of Alzheimer's disease and dementia; 7. Reduce the risk of Parkinson's disease; 8. Have liver protection effect; 9. Fight depression to make you happier; 10. Less susceptible Specific cancer; 11. Prevent heart disease and reduce the chance of stroke; 12. Help you live longer; and 13. Coffee is the largest source of antioxidants in the Western diet.

At present, most people drink coffee, the most important thing is to "revitalize", because the caffeine contained in coffee can stimulate the central nervous system and release the excitement message, so it can be fast. In addition to reducing the feeling of fatigue and anxiety, and effectively improve thinking and learning ability, in addition, caffeine can promote vasoconstriction, and the role of the head is more helpful in relieving migraine. However, many people mistakenly believe that the thicker the coffee, the higher the caffeine, the better the natural brain effect will be; but, in fact, it is not the case, the research data shows that the coffee's shade and coffee brewing It is related to how much water is added, but it is not directly related to the amount of caffeine. Check, there are many reasons for the amount of caffeine extracted, including: the type of coffee beans, the size of the abrasive particles, brewing methods, soaking time, temperature and other factors, can make a cup of coffee play different brain-shock effects, among them, Although coffee bean varieties are important factors influencing caffeine content, for example, Arabica's caffeine accounts for 1.2% of the bean weight, but Robusta is 2.2%, but in the same Under the premise of the variety, the finer the coffee beans are ground and the longer the brewing time, the more caffeine is dissolved, and the effect of refreshing the mind is naturally better.

Referring to Fig. 1, since the Japanese invented the ear-mounted coffee pod 50, the filter bag 51 containing the ground coffee 52 is hung on the edge 61 of the cup 60 of the mug 60, and the hot water is heated at 90 to 96 °C. Brewing the ground coffee 52, and then filtering the coffee broth into the mug 60 through the filter bag 51, has almost become a standard action for tens of millions of people worldwide to repeat at least once a day.

In addition, in addition to using the aforementioned ear-mounted coffee pods to brew coffee, the most commonly used coffee brewing method is commonly referred to as "drip brewing", see Figure 2, drip type Coffee is a coffee bean 72 that has been ground into a powder, first filled into a coffee filter paper 70 (located above a brewing filter 80), and poured into the coffee filter paper 70 or In the brewing process of the brewing filter 80, in the brewing process of this manner, the hot water 90 permeates the coffee powder 72, absorbs the tar and the aroma thereof, and then seeps through the gravity to the coffee. a filter paper 70 or a container 60 placed under the brewing filter 80 (eg, a coffee cup) In the coffee maker, the coffee powder residue after brewing is filtered and retained on the coffee filter paper 70.

Referring to Figure 2, although the coffee filter paper 70 was invented by the German Melitta Bentz as early as 1908, it is still widely used in the brewing process of the aforementioned drip coffee until today. In the brewing process of the aforementioned drip coffee, the advantage of using the coffee filter paper 70 is that the coffee residue remaining after the completion of brewing can be disposed of together with the coffee filter paper 70 without completely cleaning the brewing filter. 80. In general, the aforementioned coffee filter paper 70 used in the aforementioned ear-mounted coffee pod 50 (as shown in Fig. 1) or brewed coffee powder is made of crepe paper of about 100 g/m2. The effect of the wrinkles is to allow the coffee broth to flow smoothly between the coffee filter paper 70 and the brew filter 80.

In recent years, due to the popularity of dedicated coffee machines, especially in metropolitan areas around the world, the use of drip coffee brewing methods has become more popular. However, special coffee machines are cumbersome and difficult to carry after all. Therefore, the industry has also developed designs. There are many small and portable permanent brewing filters 80A, as shown in Fig. 3, these brewing filters 80A are made of metal material M and/or plasticized material P, and are evenly distributed thereon. There are a plurality of through holes or meshes 82, and the diameter of each of the through holes or meshes 82 prevents the coffee powder from passing through, and only allows the water-soluble coffee broth to pass through, and therefore, can be used without a dedicated coffee machine. In the state, as long as there is hot water, the brewing filter 80A can replace the special coffee machine, effectively solve the brewing problem of the coffee, greatly reduce the use and maintenance times of the special coffee machine, and thus greatly reduce the overall brewing coffee. The cost, and can be used repeatedly, completely eliminates the wasteful waste of a large number of disposable coffee filter papers 51, 70 (as shown in Figures 1 and 2). However, as shown in FIG. 3, since the pore size of each of the through holes or meshes 82 on the brewing filter 80A prevents the passage of the coffee powder, it does not prevent excessive baking in the coffee powder. Water-insoluble particles or impurities pass through the through-holes or meshes 82 as the coffee broth passes. As a result of the infiltration, the brewed coffee broth often becomes too bitter because it contains excessively roasted and water-insoluble particles or impurities in the coffee powder.

According to the above, when brewing drip coffee, please refer to Figures 2 and 3, and only need to hang the brewing filters 80, 80A on the cup or the mouth of a mug or coffee pot 60. The coffee powder can be filled in the brewing space 81 of the brewing filter 80, 80A, and after the hot water is poured into the brewing space 81, the brewing space 81 can be brewed. The fragrant coffee broth is directly filtered into the mug or coffee pot 60 for consumption by the user.

According to the brewing method of FIG. 2 (that is, the coffee filter paper 70 is placed in the brewing filter 80 to brew coffee), since the long-fiber material of the coffee filter paper 70 is more filterable. In addition to the precipitated particles and impurities in the coffee broth, although the mouthfeel of the coffee broth can be more delicate, the coffee filter paper 70 can remove the unwanted precipitated particles and impurities, and the oil flower in the coffee broth And the aroma is also absorbed by the fiber of the coffee filter paper 70, and is greatly lost, so that the brewed coffee broth loses its proper smoothness and aroma, which is a pity. On the contrary, the brewing method of Fig. 3 (i.e., using the brewing filter 80A having a through hole or mesh 82 to brew coffee) does not filter out the oil and aroma in the coffee broth. However, since the pore size of the upper through hole or the mesh 82 cannot completely block the passage of water-insoluble precipitated particles and impurities in the soup, the brewed coffee broth is rich in precipitated particles and impurities, and The taste is rough, bitter and disappointing.

In view of this, the inventor thought about how to design a new brewing filter that can effectively filter out water-insoluble precipitated particles and impurities in the brewing to provide a better experience for brewing coffee. That is, the invention is an important issue to be solved here.

In view of the many shortcomings and problems in the use of the aforementioned conventional coffee brewing filters, the inventors have been researching and developing various types of containers and brewing filters for many years, and after continuous research and testing, finally The brewing filter of the present invention capable of effectively filtering out the water-insoluble particles in the infusion is designed to effectively improve the defects and problems of the prior art, thereby greatly improving the brewing filter. The performance, taste and flavor of brewing and filtering coffee are performed.

An object of the present invention is to provide a brewing filter capable of effectively filtering out water-insoluble particles in a brewing, the brewing filter comprising a support ring, a filter and a water leakage portion, wherein the support ring The utility model is formed by stamping and forming a metal plate which is not corroded, and has a receiving opening at the center thereof, and an inner edge thereof extends downward to form a filter connecting portion; the filter is stamped and bent by the metal plate. After forming a funnel shape, the corresponding side edges are welded into one body, and the top edge and the bottom edge are respectively formed with a filter interface and a water leakage port, and the configuration of the filter interface is formed with the configuration of the filter connection portion. Matching, the filter interface can be welded to the filter joint, so that the filter and the support ring can be integrated into one body, and the filter is provided with a plurality of first through holes and a plurality of sedimentation grooves, a continuous perforation system runs through the opposite sides of the filter, the precipitation grooves are uniformly recessed on the inner side of the filter, and each of the sedimentation grooves is distributed between the two adjacent first through holes; The leaking part The metal plate material is formed by press forming, and a plurality of second through holes are formed thereon, and the configuration of the water leakage portion is matched with the configuration of the water leakage port, so that the water leakage portion can be welded to the water leakage port, and The water leakage portion and the filter can be integrally joined, and a brewing space is formed between the water leakage portion and the loading opening for containing a powder to be brewed (eg, coffee powder, green tea powder, almond powder... Wait).

According to this, when the user brews the coffee by using the brewing filter, the user can a brace, which is stably supported and mounted on the top edge of an opening (eg, a cup or a mouth) of a container (eg, a coffee cup, a coffee pot, etc.), and allows the brew filter to extend Into the container, the user only needs to fill the powder to be brewed (eg, coffee powder, green tea powder, almond powder, etc.) into the brewing space through the filling opening, and then Adding hot water to the brewing space, the hot water is used to wash the powder to be brewed, and after uniformly mixing into a soup, the uniformly mixed soup passes through the first through holes or the like respectively. a second through hole that flows into the container for drinking by the user; conversely, the precipitated particles or impurities that are insoluble in water in the soup are naturally and gradually due to gravity during the rest of the brewing process. Precipitating into each of the precipitation tanks without flowing through the first through holes or the second through holes into the container to ensure the soup filled in the container It is completely free of precipitated particles or impurities dissolved in water, which not only ensures that the brewing material has the most authentic and optimal Channel, can still ensure that it has the best fine taste.

In order to have a better understanding and understanding of the structural features, actuation methods and technical appeals of the present invention, the embodiments are described in detail with reference to the following figures:

[study]

50‧‧‧Over the ear coffee bag

51‧‧‧ filter bags

60‧‧‧ mug or coffee pot

61‧‧‧The mouth of the cup or the edge of the mouth

70‧‧‧Coffee filter paper

72‧‧‧coffee powder

80, 80A‧‧‧ brewing filter

81‧‧‧ brewing space

82‧‧‧through holes or meshes

90‧‧‧ hot water

M‧‧‧Metal material

P‧‧‧plastic material

〔this invention〕

10‧‧‧Support ring

100‧‧‧French opening

11‧‧‧ horizontal support shoulder

12‧‧‧Filter connection

13‧‧‧ gripping department

20‧‧‧ filter

201, 202‧‧‧ corresponding side

205‧‧‧ brewing space

21‧‧‧Filter interface

22‧‧‧ leaking mouth

23‧‧‧First through hole

24‧‧‧Sedimentation tank

30‧‧‧ leaking department

300‧‧‧second through hole

11‧‧‧dressing angle

θ2‧‧‧Funnel tilt angle

52‧‧‧Powder powder

60‧‧‧ container

61‧‧‧Open top edge

600‧‧‧Garden space

Figure 1 is a schematic diagram of a conventional hanging ear coffee bag brewing coffee; Figure 2 is a schematic view of a conventional coffee filter paper with a brewing filter for brewing coffee; Figure 3 is a conventional brewing filter. Figure 4 is a schematic view showing the structure of the brewing filter of the present invention; Figure 5 is a schematic sectional view showing the first embodiment of the filter of the present invention; and Figure 6 is a second embodiment of the filter of the present invention. A cross-sectional view; and Fig. 7 is a schematic cross-sectional view of the brewing filter of the present invention shown in Fig. 4.

The present invention is a brewing filter capable of effectively filtering out water-insoluble particles in a brewed material. Referring to a preferred embodiment of the present invention shown in Fig. 4, in the preferred embodiment, the brewing is carried out. The filter comprises a support ring 10, a filter 20 and a water leakage portion 30, wherein the support ring 10 is formed by stamping a metal plate (such as stainless steel or aluminum alloy plate, etc.) which is not corroded. The center of the support ring 10 is formed with a receiving opening 100. The outer edge of the support ring 10 extends horizontally outward in a radial direction to form a horizontal supporting shoulder 11 . The inner edge of the supporting ring 10 extends inward and downward. A filter engagement portion 12 is formed between the horizontal support shoulder 11 and the receiving opening 100, and the filter engagement portion 12 is maintained at an inclination angle θ1 with the horizontal support shoulder portion 11.

As shown in Fig. 4 and Fig. 5, the filter 20 is also formed by stamping and forming a metal plate which is not corroded, and is bent into a funnel shape to make the corresponding side 201 202 is welded into one body, and a filter interface 21 and a water leakage port 22 are respectively formed at the top edge and the bottom edge of the filter 20, and the configuration of the filter interface 21 matches the configuration of the filter engagement portion 12. The filter adapter interface 21 can be welded to the filter adapter portion 12 such that the filter 20 and the support ring 10 can be coupled to each other. The funnel inclination angle θ2 of the filter 20 is equal to the storage inclination angle θ1. The filter 20 is provided with a plurality of first through holes 23 and a plurality of precipitation grooves 24 (as shown in FIGS. 5-6). The first through holes 23 extend through opposite sides of the filter 20, and the precipitation grooves are formed. 24 is evenly recessed on the inner side of the filter 20, and each of the sedimentation grooves 24 is distributed between the two adjacent first through holes 23.

Referring to FIG. 4, the water leakage portion 30 is also formed by stamping and forming a metal plate which is not corroded, and a plurality of second through holes 300 are formed thereon, and the configuration of the water leakage portion 30 is The configuration of the water leakage port 22 is matched so that the water leakage portion 30 can be welded to the water leakage port 22, and The water leakage portion 30 and the filter 20 can be integrally joined to each other, and a brewing space 205 is formed between the water leakage portion 30 and the containing opening 100 for filling a powder to be brewed (eg, coffee powder, green tea). Powder, almond powder, etc.).

Thus, as shown in Figures 4-7, the brewing filter can be stably supported and erected in a container 60 (e.g., coffee cup, teacup, snack bowl, etc.) by the support ring 10. The opening top edge 61 allows the filter 20 to extend into the receiving space 600 of the container 60. The user only needs to powder 52 (e.g., coffee powder, green tea powder, almond powder). . . . etc.) is filled into the brewing space 205 of the filter 20, and then a liquid (such as: hot water) is added to the brewing space 205, and the liquid to be brewed is filled with a liquid (such as hot water). After the 52 is opened and evenly mixed into the broth, the uniformly mixed broth flows into the accommodating space 600 of the container 60 through the first through holes 23 or the second through holes 300, respectively. For the user to drink, the water-insoluble particles in the soup will naturally precipitate into the sedimentation tanks 24 due to gravity during the rest of the brewing, without passing the soup. Waiting for the first through hole 23 or the second through holes 300 to flow into the containing space 600 of the container 60 to ensure the inside of the containing space 600 of the container 60 Juice, completely or only a very small amount of particles are all dissolved in water.

However, it is necessary to specifically declare that the support ring 10, the filter 20 and the water leakage portion 30 of the present invention are not limited to metal sheets which are not corroded (for example, stainless steel or aluminum alloy sheets... And the like, which can be formed by stamping, can also be made by high-temperature-resistant plasticized material by injection molding, or the filter 20 and the water leakage part 30 are stamped and formed by a metal plate which is not corroded. Forming, reusing the high temperature resistant plasticized material, and integrating the two together through an injection molding process. In short, regardless of the support ring 10, the filter 20 and the water leakage on the brewing filter of the present invention What is the material, configuration and manufacturing method of the components such as the Ministry of 30? As long as the brewing filter A brewing space 205 is formed in the filter 20 for filling the powder to be brewed (e.g., coffee powder, green tea powder, almond powder, etc.), and the filter 20 is provided with a plurality of such The first through hole 23 and the sedimentation grooves 24, wherein the first through holes 23 penetrate through opposite sides of the filter 20, and the soup formed by brewing flows, and the sedimentation grooves 24 are uniformly recessed. On the inner side of the filter 20, and each of the precipitation tanks 24 is distributed between the two adjacent first through holes 23, so that the water-insoluble particles or impurities in the soup can be brewed. During the standing process, it is naturally precipitated by gravity, and does not pass through the first through holes 23, and is referred to herein as a "bubble filter".

Referring to FIG. 4 and FIG. 5, in the preferred embodiment of the present invention, the first through holes 23 of the brewing filter are circumferentially spaced apart on the filter 20, The sedimentation tanks 24 are also circumferentially spaced apart from each other on the filter 20, and each of the sedimentation tanks 24 is arranged between the two adjacent first through holes 23 along the funnel inclination angle θ2.

Referring to FIG. 4 and FIG. 5, in another preferred embodiment of the present invention, the aperture of each of the first through holes 23 on the brewing filter is smaller than each of the second through holes 300. The pore size is such that the flow rate of the brewed broth flowing through each of the first through holes 23 is smaller than the flow rate flowing through each of the second through holes 300, thereby making the water-insoluble particles in the soup more susceptible to gravity And during the brewing process, naturally and gradually precipitated into each of the sedimentation tanks 24 without passing the soup through the first through holes 23, and filtering into the container 60 to ensure passage of the The broth that is first filtered through the first through-hole 23 into the container 60 has only a very small amount or completely no precipitated particles or impurities that are insoluble in water, so that the soup has the most authentic and original taste of the brew.

Referring to FIG. 4 and FIG. 6, in another preferred embodiment of the present invention, the depth of each of the precipitation tanks 24 on the brewing filter is from top to bottom along the funnel inclination angle θ2. Increasing, in the process of brewing, can increase the precipitation of the soup into the rest space in each of the sedimentation tanks 24, so that the water-insoluble particles are more likely to be gravity-induced, naturally and gradually during the brewing process. Precipitating into each of the precipitation tanks 24 without flowing through the first through holes 23 into the container 60 to ensure filtration through the first through holes 23 into the container 60 The broth has only a very small amount or completely no precipitated particles or impurities dissolved in water to ensure that the soup has the best fine mouthfeel.

As shown in FIG. 4, in the foregoing embodiment of the present invention, in order to make the brewing filter easy for the user, the outer edge of the support ring 10 is convexly disposed with a grip portion 13 in the radial direction. It is convenient for the user to grasp the brewing filter with a finger, and perform a brewing operation (for example, the brewing filter is erected to the top edge 61 of the container 60, and the powder to be infused 52 is filled to the In the brewing space 205 of the filter 20 and after the brewing is completed, the brewing filter is removed from the open top edge 61 of the container 60, etc.).

In order to confirm the effect of the brewing filter of the present invention for filtering out the water-insoluble particles in the powder to be brewed, the inventors particularly target a commercially available permanent brewing filter having a double-layer filter, Three types of permanent brewing filters (Kinto) with a single-layer filter and the brewing filter (XueXue) of the present invention, using the same Arabica coffee beans, ground by an electric grinder with a scale of 3 Specification, after grinding into powder, take 20 grams each, fill it into each of the brewing filters, and then inject 300 liters (ml) of hot water of 75 degrees Celsius into each brewing filter for coffee. For the brewing test and comparison, the results of each of the test items are as follows:

According to the measured data, it is clearly shown that under the same test conditions, when brewing coffee using the brewing filter (XueXue) of the present invention, please refer to Figures 4-7, because the coffee broth is insoluble in water. The particles or impurities will naturally and gradually precipitate into the sedimentation tanks 24 due to gravity during the rest of the brewing, without passing the coffee broth through the first through holes 23 or the like. The second through hole 300 is filtered into the container 60. Therefore, the bubble filter (XueXue) of the present invention is indeed more than other commercially available permanent brewing filters (Driver or the like at almost the same brewing time). Kinto) can filter out most of the particles or impurities in the coffee broth that are not dissolved in water, so as to ensure that the coffee broth from the filter in the container 60 not only has the most authentic and original flavor of the coffee, but also No particles or impurities, and ensure that it has the best fine mouthfeel.

The above description is only a few preferred embodiments of the present invention, but the technical features of the present invention are not limited thereto, and those skilled in the relevant art can easily consider after referring to the technical content of the present invention. Changes should be made without departing from the scope of protection of the invention.

Claims (6)

A brewing filter capable of effectively filtering out water-insoluble particles in a brewing machine, comprising: a supporting ring made of a material resistant to high temperature and not corroding, wherein a center of the support ring is formed with a receiving opening, The inner edge of the support ring extends downward to form a filter joint; a filter is also made of a material resistant to high temperature and rust-free, and has a funnel shape, and the top and bottom edges of the filter are respectively formed. a filter interface and a water leakage port, the filter interface configuration is matched with the configuration of the filter connector, so that the filter interface can be connected to the filter connection portion, so that the filter and the support ring can The filter is integrally formed with a plurality of first through holes and a plurality of sedimentation grooves, the first through holes penetrating through opposite sides of the filter, and the sedimentation grooves are uniformly recessed in the filter The inner side surface, and each of the sedimentation tanks is distributed between the two adjacent first through holes; and a water leakage portion is also made of a material resistant to high temperature and is not corroded, and a plurality of the plurality of Two through holes, the water leakage portion The shape is matched with the configuration of the water leakage port, so that the water leakage portion can be connected to the water leakage port, so that the water leakage portion and the filter can be integrated with each other, and a rush is formed between the water leakage portion and the storage opening. A bubble space for filling the soup mixture of the powder to be brewed and the liquid. The brewing filter of claim 1, wherein the outer edge of the support ring extends horizontally in a radial direction to form a horizontal support shoulder, and the filter support portion is formed between the horizontal support shoulder and the receiving opening. The filter engagement portion maintains a tilt angle with the horizontal support shoulder, and the funnel tilt angle of the filter is equal to the containment tilt angle. The brewing filter of claim 2, wherein the first through holes are circumferentially spaced apart on the filter, and the precipitation grooves are also circumferentially spaced apart on the filter, and Each of the sedimentation tanks is arranged between the two adjacent first through holes along the inclined angle of the funnel. The brewing filter of claim 1, wherein the aperture of each of the first through holes is smaller than the diameter of each of the second through holes, so that the flow rate of the soup flowing through the first through hole It is smaller than the flow rate of each of the second through holes, so that the water-insoluble particles in the soup are more likely to be gravity-damped, and naturally precipitate into the sedimentation tanks during the brewing process. The brewing filter according to claim 4, wherein the depth of each of the sedimentation tanks is increased from top to bottom along the inclination angle of the funnel to increase the precipitation of the juice to each of the precipitation tanks during the brewing process. The static space in the space is such that particles which are insoluble in water are more likely to be naturally precipitated into each of the precipitation tanks by gravity. The brewing filter of claim 5, wherein the outer edge of the support ring is convexly disposed in a radial direction for the finger to grasp the brewing filter.