Filter inserts for brewing devices for preparing beverages, particularly coffee or tea, and brewing devices equipped with such filter inserts.

Abstract

The present invention relates to a filter insert (28) for an infusion device (10) for preparing a beverage, in particular coffee or tea. The filter insert (28) comprises a wall (30) having a first open end (31) and a second open end (31), the wall (30) enclosing a cavity into which a substance used for preparing the beverage can be inserted, the wall (30) having a perforated portion (34) with a number of filter openings (36), and a closure member (44) removably connectable or connected to the wall (30) in the region of the first open end (31) and capable of closing the first open end (31). Furthermore, the present invention relates to an infusion device (10) equipped with such a filter insert (28).

Description

Technical Field

[0001] The present application relates to a filter insert for a brewing device for preparing beverages, in particular coffee or tea. Furthermore, the present application relates to a brewing device comprising such a filter insert.

Background Art

[0002] A brewing device for preparing beverages is also called a French press or a press filter. The brewing device has a container with an opening and a closed bottom, and the container generally has a cylindrical or prismatic shape. To prepare coffee or tea, a desired amount of insoluble matter such as coffee grounds or tea leaves is put into the container, and then hot water is poured thereover. Next, the coffee grounds or tea leaves are extracted over a certain period of time. Thereafter, a plunger-filter assembly including a piston rod and a press filter attached to the piston rod is placed into the container. Typically, the piston rod is slidably attached to a lid that can be fitted into the opening and used to close the container. The press filter has a shape corresponding to the cross-section of the container, so that the press filter fits the container closely at its side portions. The press filter is pressed toward the bottom by the piston rod. As a result, the extracted coffee grounds or tea leaves are separated from the coffee or tea and compressed in the region of the closed end. The coffee or tea filtered in this way is ready for drinking. After the coffee or tea is completely consumed, the plunger-filter assembly is pulled out from the container, and the compressed coffee grounds or tea leaves are removed from the container. Documents disclosing relevant prior art include Patent Documents 1 to 4.

[0003] In such a brewing device, when the press filter is pressed down, a considerable force acts on the wall of the container, which is often made of glass. In extreme cases, the glass of the container may break, causing the hot water inside to flow out, which poses a risk of scalding the user.

[0004] From Patent Documents 5, 6, or 7, a tea infusion device having a filter insert that can be inserted into a container is known. The plunger filter assembly is displaceable within the filter insert to press the infused tea leaves toward the bottom of the filter insert. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] German Patent No. 3432289 Specification [Patent Document 2] International Publication No. 02 / 067739 [Patent Document 3] European Patent Application Publication No. 2798985 [Patent Document 4] International Publication No. 96 / 035360 [Patent Document 5] International Publication No. 92 / 13475 [Patent Document 6] U.S. Patent Application Publication No. 2005 / 0199129 Specification [Patent Document 7] International Publication No. 2007 / 082391 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, such filter inserts cannot be cleaned properly. After brewing and pouring a beverage, the extracted tea leaves remain at the bottom of the filter insert and cannot be easily removed. The same problem arises, for example, when such filter inserts are used for preparing coffee.

[0007] The objective of one embodiment of the present invention is to propose a filter insert for a leaching device that can provide a solution to the above-mentioned situation by simple and inexpensive means, and in particular to produce a filter insert that can be cleaned by a simple method.

[0008] Furthermore, one embodiment of the present invention is based on the challenge of generating a leaching device that can be operated with such a filter insert. [Means for solving the problem]

[0009] This problem is addressed by claim 1 , claim 2, and claims 6 This is resolved by the features shown. Advantageous embodiments are the subject of the subclaims. One embodiment of the present invention relates to a filter insert for an infusion device for preparing beverages, particularly coffee or tea, wherein the filter insert is A wall having a first open end and a second open end, the wall enclosing a cavity into which a substance used to prepare a beverage can be inserted, and the wall having a perforated portion with a plurality of filter openings, The device comprises a closing member that can be detachably connected to or connected to a wall in the region of the first open end, and which can close the first open end.

[0010] As mentioned earlier, when insoluble substances are typically moved toward the bottom of the container by the plunger filter assembly, the insoluble substances are located in the region of the first open end of the filter insert. Furthermore, if the beverage in question is prepared without the assistance of the plunger filter assembly, the insoluble substances will accumulate over time at the first open end of the filter insert due to the weight force acting upon them. In the prior art, cleaning the filter insert is cumbersome because a closure member is fixedly connected to the first end of the filter insert. In contrast, according to this application, the closure member can be removed from the filter insert, which makes the cleaning process much easier. In particular, it is possible to remove the insoluble substances located in the region of the first open end from the filter insert through the first open end in a simple manner before the cleaning process begins. In this respect, most of the insoluble substances can be removed from the filter insert without the need for a cleaning solution. Improved accessibility to the cavity surrounded by the filter insert prevents insoluble substances from adhering to hard-to-reach places, making their removal extremely difficult. In this respect, the filter insert proposed in this invention not only helps to simplify the cleaning process but also contributes to reducing the amount of cleaning solution required.

[0011] In a further embodiment, the filter insert may include a sealing element, which allows the closure member to be sealed against the wall. During the leaching process, it is not important whether the wall is sealed against the closure member. However, when the beverage is prepared and the filter insert is removed from the container, the sealing element prevents hot beverage residue from dripping out of the filter insert, particularly through the first open end which is closed by the closure member. This makes handling the filter insert safer and more hygienic. In particular, it prevents beverage residue from dripping uncontrollably onto surfaces that would later require more or less costly cleaning.

[0012] According to another embodiment, the wall forms a fixed portion, and the closing member forms an opposing fixed portion formed complementary to the fixed portion, and the fixed portion and the opposing fixed portion interact with each other so that the closing member can be removably connected to or connected to the wall.

[0013] The fixed portion and the opposing fixed portion may form an interaction surface. When the closure member is fixed to the insert, a friction closure is formed between the interaction surfaces, thereby fixing the closure member to the wall of the insert. The friction closure is strong enough, on the one hand, to ensure that the closure member does not detach from the wall during operation of the filter insert, and on the other hand, not too strong, to allow for comfortable connection and disconnection of the closure member to the wall of the insert.

[0014] According to further embodiments, A first projection or a first recess is formed on the fixed portion. A second projection or a second recess is formed on the opposing fixed portion. The first projection or first recess, and the second projection or second recess, interact with each other so that the closing member can be removably connected to or connected to a wall.

[0015] Recesses and protrusions can establish a latching or snapping connection between the closing member and the insert wall. Such protrusions and recesses are easy to manufacture, reliable in insert operation, and user-friendly. The protrusions and recesses may also be configured with inclinations so that the closing member can be connected to and disconnected from the insert wall in a screw-like manner.

[0016] According to another embodiment, the fixing portion is formed by a separate intermediate part fixed to the wall. As mentioned above, the wall has a perforated portion that forms a plurality of filter openings for separating insoluble substances from a liquid. The wall, or at least the perforated portion, can therefore be made of a thin material similar to a sieve. However, to provide frictional restraint or a first protrusion or a first recess, an intermediate part having a greater thickness than the perforated portion is used. As a result, the fixing portion has sufficiently high stability to ensure that the closing member, although indirectly, is reliably fixed to the wall.

[0017] In a further embodiment, the filter insert may comprise a connecting element non-removably connected to the wall, and a closing member is or can be removably inserted into said connecting element. As stated, the wall of the filter insert has a perforated portion provided with a plurality of filter openings. For this purpose, it is advantageous to manufacture the wall from a relatively thin steel plate. The connecting element can be designed such that, on the one hand, the connecting element can be easily and permanently connected to the steel plate, and on the other hand, the closing member can be easily connected to and disconnected from the connecting element.

[0018] In a further embodiment, the sealing element may be configured to seal the closing member against the connecting element. In some embodiments, it is not necessary to seal the closing member against the wall. Through the already mentioned filter openings, beverage residues can in any case flow out of the filter insert through the wall. However, sealing the closing member against the connecting element prevents beverage residues accumulated in the volume enclosed by the closing member and the connecting element from flowing out in an uncontrolled manner and causing the contamination described above.

[0019] In a further embodiment, the closure member can be screwed onto the connecting element. In this way, it is relatively easy to connect and disconnect the closure member to and from the connecting element. In addition, since the closure member is screwed onto the connecting element, a user of the filter insert can apply a sufficiently high force to the sealing element so that the sealing element can provide its sealing effect to the required extent.

[0020] A further embodiment is characterized in that in the region of the second open end, a support flange projecting radially outward beyond the wall is attached to the wall. The support flange serves for placing the filter insert onto a container in which a beverage is prepared. In this regard, the position of the filter insert relative to the container can be defined within certain limits during the brewing process. In particular, it is not necessary to hold the filter insert with one hand during the brewing process. This improves the handling of the brewing device and increases operational safety.

[0021] An embodiment of the present invention relates to a brewing device for preparing beverages, in particular coffee or tea, wherein the brewing device comprises a container having an opening, and a filter insert according to any one of the preceding embodiments, which can be inserted into the container through the opening.

[0022] The technical effects and advantages that can be obtained with the proposed brewing device are the same as those discussed for the filter insert of the present invention. In summary, it should be noted that the filter insert can be sufficiently cleaned in a simple manner. Furthermore, in particular, the improved accessibility to the cavity surrounded by the filter insert prevents coffee grounds or tea leaves from adhering to inaccessible areas, so that the amount of cleaning agent required for cleaning the filter insert can be reduced.

[0023] In a further embodiment, the brewing device comprises a retaining ring, wherein the retaining ring can be in contact with a contact edge surrounding the opening, It may be provided that the filter insert has a holding portion that can be in contact with it.

[0024] Using a retaining ring allows the filter insert to be positioned relative to the container in a way that prevents, or at least significantly reduces, the relative movement of the filter insert relative to the container, especially when pouring the finished beverage. This makes pouring the beverage safer. In addition, the retaining ring can be used like an adapter, allowing the same filter insert to be used in containers of different shapes. In this respect, there is no need to adapt the filter insert to different containers. Rather, it is sufficient to provide a retaining ring for each of the different containers, and such retaining rings can usually be manufactured in a simpler and less expensive way than the filter inserts themselves.

[0025] A more advanced embodiment may provide that the retaining ring includes a sealing portion that allows the retaining ring to seal against the container. The sealing portion also ensures that the retaining ring is positioned relative to the container. This prevents the retaining ring from unintentionally detaching from the container. In addition, it prevents the beverage from spilling out of the container uncontrolled while being poured.

[0026] In a more advanced embodiment, the retaining ring may have at least one through-opening through which the beverage can flow. In particular, when the retaining ring is sealed to the container by the aforementioned sealing portion, the through-opening allows the beverage to be poured from the container at a clearly defined location. This contributes to the operational safety of the leaching device, especially when the beverage is still very hot.

[0027] In further embodiments, the leaching device may be provided with a plunger filter assembly that is insertable into a filter insert through a second open end and slidable within the filter insert. Using the plunger filter assembly, it is possible to move coffee grounds, tea leaves, or other insoluble materials used to prepare the beverage toward the second open end of the filter insert and separate them from the rest of the beverage. Even if the filter opening already holds the insoluble materials within the cavity of the filter insert, depending on the size of the particles of the insoluble materials, it may not always be possible to reliably prevent some of the insoluble materials from exiting the filter insert and thus contaminating the prepared beverage consumed by the user. Such particles are typically perceived as unpleasant by the user. The use of a plunger filter assembly can significantly reduce the proportion of particles exiting the cavity of the filter insert and thus increase the enjoyment of the prepared beverage.

[0028] An advanced embodiment may specify that the plunger filter assembly has a piston rod, and the leaching device includes a lid that can contact a filter insert or holding portion, and the piston rod is slidably mounted to the lid. In this embodiment, in particular, the plunger filter assembly can be operated very easily and conveniently because the piston rod is guided by the lid and therefore performs a constant movement.

[0029] Exemplary embodiments of the present invention are described in more detail below with reference to the accompanying drawings. [Brief explanation of the drawing]

[0030] [Figure 1A] A side view of a first embodiment of the leaching device according to the present invention. [Figure 1B] A cross-sectional view showing the embodiment shown in Figure 1A along the section AA defined in Figure 1A. [Figure 1C]A magnified view of the area X marked in Figure 1B. [Figure 2A] A side view showing a second embodiment of the leaching device according to the present invention. [Figure 2B] A cross-sectional view showing the embodiment shown in Figure 2A along the cross-section BB defined in Figure 2A. [Figure 2C] An enlarged view of the area Y marked in Figure 2B. [Figure 3A] A cross-sectional view showing a third embodiment of the leaching device according to the present invention, according to the field of view of Figure 1B. [Figure 3B] A magnified view of the area Z marked in Figure 3A. [Modes for carrying out the invention]

[0031] Figures 1A to 1C illustrate a first embodiment of the leaching device 101 according to the present invention in relation to various figures. The leaching device 101 comprises a container 12, which in the shown embodiment is designed as a substantially cylindrical glass or plastic container and has a closed bottom 14 and an opening 16. The container 12 can be inserted into a handling device 18, which has a receiving structure 20 to which a handle 22 is attached. In this regard, the handling device 18 is in substantially tight contact with the outside of the container 12 and has legs 24 so that the leaching device 101 can be safely placed on a stand not shown herein.

[0032] The container 12 has a dispensing portion 26 in the area of ​​the opening 16, which allows the beverage prepared in the brewing device 101 to be poured, for example, into a cup, which will be discussed in more detail below.

[0033] As can be seen particularly in Figure 1B, the filter insert 28 is inserted into the container 12 through the opening 16. The filter insert 28 comprises a wall 30 surrounding the cavity 32. The wall 30 also has a substantially cylindrical shape and has a first open end 31 and a second open end 33. Referring to the embodiment selected in Figures 1A to 1C, the first open end 31 is located in the bottom region, and the second open end 33 is located in the region of the opening 16 of the container 12. The wall 30 comprises at least one perforated portion 34, the perforated portion 34 containing a plurality of filter openings 36, as shown in Figure 1C.

[0034] In particular, Figure 1C shows that a connecting element 38 is connected to the wall 30 of the filter insert 28 in the region of the first open end 31. In the embodiment shown, the connecting element 38 is fixed to the wall 30 of the filter insert 28 by form closure. For this purpose, the protrusion 40 of the connecting element 38 engages with the mounting hole 42 of the wall 30.

[0035] Furthermore, the filter insert 28 includes a closing member 44, which, in the shown embodiment, can be screwed onto a connecting element 38, thereby closing the first open end 31 of the filter insert 28. The screwing can be done, for example, in the form of a bayonet lock. In addition, a sealing element 46 is attached to the connecting element 38, and for this purpose the connecting element 38 has a correspondingly formed recess 50. The sealing element 46 seals the closing member 44 against the connecting element 38. The connecting element 38 has a sealing surface 52 that is cross-sectionally complementary to the sealing element 46, and the sealing element 46 is pressed against this sealing surface 52 when the closing member 44 is screwed onto it. The resulting deformation causes the sealing element 46 to seal the closing member 44 against the connecting element 38.

[0036] In the region of the second open end 33, the filter insert 28 is connected to a support flange 54 that allows the filter insert 28 to be positioned on the container 12 in the opening 16. The support flange 54 is connected to the filter insert 28 by a snap connection, although other methods of connecting the support flange 54 and the filter insert 28 are possible. However, in the embodiment shown, the support flange 54 does not rest directly on the container 12, but directly on a retaining ring 56 that is introduced into the container 12 through the opening 16. The retaining ring 56 has a holding portion 58 that secures the retaining ring 56 to the container 12, and the holding portion 58 abuts against the inner surface of the container 12. When fully inserted, the holding portion 58 is located below the dispensing portion 26, referring to the diagrams in Figures 1A to 1C. Furthermore, the retaining ring 56 has a plurality of through-openings 60 that are positioned in the region of the dispensing portion 26 in the intended use of the leaching device 101. To receive the support flange 54, the retaining ring 56 has a retaining portion 61.

[0037] In addition, the leaching device 101 includes a plunger filter assembly 62 comprising a press filter 64 and a piston rod 66 connected to the press filter 64. The piston rod 66 is slidably mounted to a lid 68, which can be fitted into a retaining portion 61 of a retaining ring 56 to close the opening 16 of the container 12. The lid 68 also secures the filter insert 28 to the retaining ring 56.

[0038] The procedure for preparing the beverage is as follows: First, typically insoluble substances, such as coffee grounds or tea leaves, are placed in the filter insert 28. The filter insert 28 is closed at a first open end 31 by a closing member 44, but is open at a second open end 33. Next, if not already done, a retaining ring 56 is inserted into the container 12, and then the filter insert 28 is placed on the retaining ring 56. Then, liquid, especially hot water, is poured into the container 12, and it is left to wait until the insoluble substances are extracted to the desired extent. During the extraction process, the lid 68 can already be placed on the retaining ring 56. At this time, the press filter 64 is placed in the area of ​​the second open end 33 of the filter insert 28. As the extraction process is nearing completion, the piston rod 66 is moved toward the bottom 14 of the container 12, thereby inserting the press filter 64 into the cavity 32 of the filter insert 28, thereby moving the insoluble substances toward the area of ​​the first open end 31 of the filter insert 28. With this, the leaching device 101 can be grasped by the handle 22 and the prepared beverage can be poured, for example, into a cup. The beverage flows first through the through-opening 60 and then through the dispensing section 26, as the holding section 58 seals the retaining ring 56 away from the container 12, and insoluble substances are held in place by the filter insert 28, as the filter opening 36 is sized to be smaller than most of the particles of the insoluble substances.

[0039] Once container 12 is completely empty or no further beverage will be consumed, remove the filter insert 28 from container 12. The filter insert 28 can be removed from container 12 together with the lid 68 and the plunger filter assembly 62 provided on the lid 68. However, it is also possible to first separate the plunger filter assembly 62 from the filter insert 28 together with the lid 68 before removing the filter insert 28 from container 12. In either case, the plunger filter assembly 62 must be separated from the filter insert 28 in order to clean the filter insert 28. Once this is done, insoluble matter located in the area of ​​the second open end 33 can be removed from the filter insert 28, for example, by emptying the contents of the filter insert 28 into a trash can. However, even if this is done, it will typically not be possible to remove all insoluble matter. To allow the filter insert 28 to be thoroughly cleaned, separate the closing member 44 from the rest of the filter insert 28 so that both the first open end 31 and the second open end 33 are now open. Next, both the filter insert 28 and the closing member 44 can be cleaned, for example, in a dishwasher or by hand. Because the closing member 44 is removably attached to the filter insert 28, the cavity 32 is easily accessible, particularly in the area of ​​the second open end 33, and thus insoluble substances mainly located in that area can be easily removed.

[0040] Figures 2A to 2C illustrate a second embodiment of the leaching device 102 according to the present invention. The basic structure of the leaching device 102 according to the second embodiment largely corresponds to that of the leaching device 101 according to the first embodiment, so only the main differences will be discussed below. In particular, the filter insert 28 has essentially the same structure as in the first embodiment and can therefore be used in the leaching devices according to the first and second embodiments with only minor modifications to the second open end 33.

[0041] While the brewing device 101 according to the first embodiment is particularly suitable for preparing coffee, and the brewing device 102 according to the second embodiment is particularly suitable for preparing tea, no strict distinction is made herein. In other words, each embodiment of the brewing device 10 can also be used to prepare other beverages. It should be noted that the filter insert 28 can also be used for other applications not shown herein.

[0042] The essential difference is that the leaching device 102 according to the second embodiment does not include a plunger filter assembly 62. In this respect, the lid 68 does not have a guide for the piston rod 66 of the plunger filter assembly 62. In addition, the container 12 of the leaching device 102 according to the second embodiment has a different structure from the container 12 of the leaching device 101 according to the first embodiment. In the leaching device 102 according to the second embodiment, the container 12 is made of plastic, not glass, and the handle 22 is directly integrated into the container 12. Therefore, there is no need to use the handling device 18 described for the first embodiment of the leaching device 101. The container 12 is configured to be securely placed on a support that is not shown.

[0043] As described above, the lid 68 does not have a guide for the piston rod 66 of the plunger filter assembly 62. Therefore, the retaining ring 56 also has a slightly different structure. Compared with the leaching device 101 according to the first embodiment, the retaining ring 56 of the leaching device 102 according to the second embodiment does not protrude as far into the container 12. As a result, the retaining ring 56 also does not have a through opening 60, so that the beverage can flow directly into the dispensing section 26.

[0044] The holding portion 58 of the retaining ring 56 is provided with a plurality of protrusions 70 facing radially outward. Except for the operation of the plunger filter assembly 62, the leaching device 102 according to the second embodiment can be used in the same way as described for the leaching device 101 according to the first embodiment. As already mentioned, the filter insert 28 can be used in various leaching devices. For this purpose, only minor modifications to the area of ​​the second open end 33 are necessary. Thus, a modular system is realized, and the cost of each is kept low without compromising the versatility of applications.

[0045] Figures 3A and 3B show a third embodiment of the leaching device 103 according to the present invention. Figure 3B is an enlarged view of portion Z shown in Figure 3A. The basic structure of the leaching device 103 of the third embodiment is generally similar to the leaching devices 101 and 102 according to the first and second embodiments, so only the important differences are described below.

[0046] The leaching device 103 of the third embodiment is equipped with a fixed portion 72 adjacent to the first open end 31. The fixed portion 72 is formed by an intermediate part 71 having a substantially cylindrical shape, the outer diameter of which is slightly smaller than the inner diameter of the rest of the wall 30. The intermediate part 71 is connected to the wall 30 by a morphological constraint formed by an annular projection 82 facing radially outward between the intermediate part 71 and the wall 30. The wall thickness of the intermediate part 71 is greater than the wall thickness of the wall 30.

[0047] Multiple first protrusions 74 are formed on the outer surface of the fixed portion 72 of the intermediate component 71. The first protrusions 74 are slightly inclined with respect to the plane defined by the first open end 31.

[0048] The closing member 44 forms a complementary opposing fixing portion 76 on its inner surface to the fixing portion 72. Multiple second protrusions 78 are formed on the opposing fixing portion 76, facing radially inward. The second protrusions 78 are inclined in the same way as the first protrusions 74.

[0049] To connect the closing member 44 to the wall 30, the closing member 44 is positioned coaxially with the wall 30 and then moved toward the first open end 31. The closing member 44 is further moved along the longitudinal axis of the filter insert 28 so that the first projection 74 and the second projection 78 interact with each other to form a morphological constraint. The inclination of the first projection 74 and the second projection 78 allows the closing member 44 to rotate about the longitudinal axis of the filter insert 28, thereby moving the closing member 44 along the longitudinal axis until it contacts the first open end 31. In this way, the closing member 44 is fixed to the filter insert 28 in a manner similar to a screw.

[0050] To disconnect the closing member 44 from the filter insert 28, rotate the closing member 44 in the opposite direction until the engagement between the first projection 74 and the second projection 78 is disengaged. The closing member 44 can then be removed from the filter insert 28 by moving it along its longitudinal axis. [Explanation of symbols]

[0051] 10 Leaching devices 101, 102, 103 Leaching Devices 12 containers 14 Bottom 16 Opening 18 Handling devices 20 Receptive Structure 22 handles 24 legs 26 Pour part 28 filter inserts 30 walls 31 First open end 32 Cavity 33 Second open end 34 Perforated part 36 filter aperture 38 connection elements 40 Convex part 42 mounting holes 44 Closing member 46 Seal elements 50 recesses 52 sealing surface 54 Support flange 56 Retaining ring 58 Holding section 60 Through-opening 61 Holding part 62 Plunger Filter Assembly 64 Press Filter 66 Piston Rod 68 Lid 70 Protrusion 71 Intermediate parts 72 Fixed part 74 First projection 76 Opposing fixed part 78 Second protrusion 82 Outward-facing convex part

Claims

1. A filter insert (28) for an infusion device (10) for preparing a beverage, particularly coffee or tea, wherein the filter insert (28) is A wall (30) having a first open end (31) and a second open end (33), wherein the wall (30) encloses a cavity into which a substance used to prepare the beverage can be inserted, and the wall (30) has a perforated portion (34) with a plurality of filter openings (36), The device comprises a closing member (44) that can be detachably connected to or connected to the wall (30) in the region of the first open end (31) and can close the first open end (31), The filter insert (28) comprises a connecting element (38) that is irremovably connected to the wall (30), and the closing member (44) is removablely insertable into or inserted into the connecting element (38). The filter insert (28) includes a sealing element (46), The sealing element (46) is configured to seal the closing member (44) against the connecting element (38) in a filter insert (28).

2. A filter insert (28) for an infusion device (10) for preparing a beverage, particularly coffee or tea, wherein the filter insert (28) is A wall (30) having a first open end (31) and a second open end (33), wherein the wall (30) encloses a cavity into which a substance used to prepare the beverage can be inserted, and the wall (30) has a perforated portion (34) with a plurality of filter openings (36), The device comprises a closing member (44) that can be detachably connected to or connected to the wall (30) in the region of the first open end (31) and can close the first open end (31), The wall (30) forms a fixed portion (72), The closing member (44) has an opposing fixing portion (76) formed complementary to the fixing portion (72), The fixed portion (72) and the opposing fixed portion (76) interact with each other so that the closing member (44) can be removably connected to or connected to the wall (30), The fixed portion (72) is formed by a separate intermediate component (71), and the intermediate component (71) is fixed to the wall (30) by a morphological constraint formed by an annular projection (82) facing radially outward between the intermediate component (71) and the wall (30), in a filter insert (28).

3. A first projection (74) or a first recess is formed on the fixed portion (72), A second projection (78) or a second recess is formed on the opposing fixed portion (76), The filter insert (28) according to claim 2, characterized in that the first projection (74) or first recess and the second projection (78) or second recess interact with each other so that the closing member (44) can be removably connected to or connected to the wall (30).

4. The filter insert (28) according to claim 1, characterized in that the closing member (44) can be screwed into the connecting element (38).

5. The filter insert (28) according to claim 1 or 2, characterized in that a support flange (54) that protrudes radially outward beyond the wall (30) in the region of the second open end (33) is fixed to the wall (30).

6. An infusion device (10) for preparing a beverage, particularly coffee or tea, wherein the infusion device (10) is A container (12) having an opening (16), A leaching device (10) comprising a filter insert (28) according to any one of claims 1 to 4, which can be inserted into the container (12) through the opening (16).

7. The leaching device (10) includes a retaining ring (56), The retaining ring (56) is The container (12) can come into contact with the region of the opening (16), The filter insert (28) has a retaining portion (61) that can be contacted. The leaching device (10) according to claim 6, characterized in that it is the same as the one described in claim 6.

8. The leaching device (10) according to claim 7, characterized in that the retaining ring (56) has a sealing portion (58) that can seal the retaining ring (56) to the container (12).

9. The leaching device (10) according to claim 8, characterized in that the retaining ring (56) has at least one through-opening (60) through which the beverage can flow.

10. The leaching device (10) according to claim 6, comprising a plunger filter assembly (62), wherein the plunger filter assembly (62) is insertable into the filter insert (28) through the second open end (33) and slidable within the filter insert (28).

11. The plunger filter assembly (62) has a piston rod (66), the leaching device (10) has a lid (68) that can be brought into contact with the filter insert (28), and the piston rod (66) is displaceably mounted to the lid (68), as described in claim 10.

12. The leaching device (10) includes a retaining ring (56), The retaining ring (56) can come into contact with the container (12) in the region of the opening (16), The retaining ring (56) has a retaining portion (61) that can be contacted by the filter insert (28), The plunger filter assembly (62) has a piston rod (66), the leaching device (10) has a lid (68) that can be brought into contact with the holding portion (61), and the piston rod (66) is displaceably attached to the lid (68), as described in claim 10.

Images