JP7733402B2 - Beverage extraction filter and beverage extraction bag - Google Patents

Description

The present invention relates to a beverage extraction filter and a beverage extraction bag.

Beverage extraction filters that can be stably set in a container to brew a single cup of coffee or other beverage have been widely developed (for example, see Patent Document 1 below).
The beverage extraction filter described in Patent Document 1 is designed to be hooked onto the opening of a cup (container) with a diameter of up to about 80 mm, and to extract one cup's worth of beverage, such as coffee, i.e., about 8 g (about 140 cc).
However, in some cases, you may want to extract more coffee than the amount mentioned above. In such cases, you should increase the amount of beans in the beverage extraction filter by 1.5 times, increase the amount of hot water poured in accordance with the amount of beans, and use a larger cup.

Japanese Patent Application Publication No. 8-268440

Conventional beverage extraction filters fit cups with a diameter of about 70 to 80 mm, but it is difficult to attach the holder to a larger mug with a diameter of about 90 to 100 mm, and there are problems such as the holder coming off even when attached, or the installation being unstable.
Therefore, the present invention provides a beverage extraction filter and a beverage extraction bag that can be used in one size to accommodate cups with normal to larger diameters and that are highly stable when used in a container.

The beverage extraction filter of the present invention comprises a bag-shaped filter body having a pair of base materials facing each other; an upper attachment portion attached to the outer surface of the filter body so as to face the outer surface and attached horizontally to the top of the filter body; a central attachment portion extending downward from the horizontal center of the upper attachment portion; arm portions extending upward in a V-shape along both side edges of the central attachment portion and then extending left and right so as to be separated from each other at their upper ends; and a hook portion that is continuous with the two arm portions and their left and right ends, surrounding the sides and below the arm portions, and is spaced from the filter body so as to be hooked onto the outer peripheral surface of a container, and an upper bend line is formed at the boundary between the arm portions and the hook portion, extending vertically to align the upper part of the hook portion with the container.
With this configuration, even when the holder is hung on a large-diameter container, the upper part of the hanging portion is prevented from warping against the container, and the holding force of the holder on the container can be ensured satisfactorily.

The upper folding line of the beverage extraction filter of the present invention may extend from the outer peripheral edge of the boundary to a position not reaching the inner peripheral edge.
This configuration makes it possible to prevent the upper part of the hooking portion from warping back against the container, while still allowing the arm portion to have a resilient force against the upper part of the hooking portion.

The upper folding line of the beverage extraction filter of the present invention may be formed to have a dimension that is between one half and three-quarters of the distance from the outer peripheral edge to the inner peripheral edge on the extending line.
This configuration effectively prevents the upper part of the hook from warping back against the container, while providing the arm with resilience against the upper part of the hook.

The hanging portion of the beverage extraction filter of the present invention has an upper holding portion that extends downward with the extension of the upper folding line as its inner peripheral edge and fits along the top of the container, and a lower holding portion that tapers from the lower end of the upper holding portion toward the center in the width direction and connects to the bottom, and the upper holding portion may have a holding flap that protrudes toward the arm portion via the upper folding line on its inner peripheral edge and can rise up around the upper folding line in accordance with the shape of the peripheral surface of the container.
According to this configuration, the upper pressing portion and the pressing flap provide a stable holding force for the container.

The pressing flap of the beverage extraction filter of the present invention may be formed in a rectangular shape with the upper folding line as a longitudinal direction.
This configuration increases the holding force of the holding flap on the container.

The beverage extraction bag of the present invention has any one of the beverage extraction filters described above and a beverage extraction ingredient sealed therein.
According to this configuration, the beverage extraction bag can achieve the above-mentioned functions and effects.

The beverage extraction filter and beverage extraction bag of the present invention have the advantage that one size can be used for cups with normal to large diameters, and can be stably installed in the container.

1 is a front view of a beverage extraction filter according to an embodiment of the present invention, showing the filter in a flat state before opening. 1 is a front view of a beverage extraction filter according to an embodiment of the present invention, showing the filter in a flat state before opening. 1 is a front perspective view from above showing a state in which a beverage extraction filter according to an embodiment of the present invention is used. 1 is a side perspective view from above showing a state in which the beverage extraction filter according to one embodiment of the present invention is used. 1A is a front perspective view of a beverage extraction filter according to another embodiment of the present invention, showing a comparison of the usage states of the beverage extraction filter according to the first embodiment of the present invention; FIG. 10 is a front view of a beverage extraction filter according to another embodiment of the present invention, showing the filter in a flat state before opening.

Hereinafter, a beverage extraction filter and a beverage extraction bag according to an embodiment of the present invention will be described with reference to the drawings. In each embodiment, the terms "up, down, left, right" refer to the orientation of the beverage extraction filter when it is installed in a container.

As shown in FIG. 1, a beverage extraction filter 1 according to one embodiment of the present invention includes a bag-shaped filter body 3 having an opening 2 formed at the upper end thereof, and a holder 4 attached to the outer surface of the filter body 3, which engages the filter body 3 with a container 100 shown in FIG. 3 and maintains the shape of the filter body 3.

As shown in FIG. 2, the filter body 3 includes sheet substrates 5, 5 that are used with the same shaped sheet surfaces facing each other.
The sheet substrate 5 (one side) is formed into a pentagon surrounded by a first upper edge 5a extending horizontally, second upper edges 5b, 5b extending diagonally downward from both ends of the first upper edge 5a so as to be spaced apart from each other, and left and right lower edges 5c, 5c extending from the lower end of the upper edge 5b toward the apex 5d.
The angle formed between the first upper side 5a and the second upper side 5b is set to approximately 135 degrees, the angle formed between the second upper side 5b and the lower side 5c is set to approximately 90 degrees, and the angle formed between the lower sides 5c, 5c is set to approximately 90 degrees.

The sheet substrates 5, 5 are made of a liquid-permeable material such as filter paper or nonwoven fabric, and are stacked with their sides aligned, and are bonded together by linearly and continuously welding the portions immediately adjacent to the left and right lower sides 5c, 5c, leaving the first upper side 5a and second upper side 5b, 5b open. This forms a bag body that can be opened at the first upper side 5a and second upper side 5b, and whose closed lower sides 5c, 5c narrow toward the top 5d.

1, the holder 4 has a pair of plate-shaped holding portions 6, 6 fixed to sheet substrates 5, 5 that form the front and back sides of the filter body 3. The holder 4 is made of a rigid material such as paper or synthetic resin.
As shown in FIG. 2, the holding portion 6 is formed into a substantially hexagonal shape by a first upper side 6a and a second upper side 6b, 6b, a first lower side 6c, 6c and a second lower side 6d.

The first upper side 6 a and the second upper sides 6 b , 6 b are formed along and substantially parallel to the first upper side 5 a and the second upper sides 5 b , 5 b of the sheet substrate 5 .
The first lower sides 6 c , 6 c are formed along and substantially parallel to the lower sides 5 c , 5 c of the sheet substrate 5 .
The second lower side 6d is formed to be substantially parallel to the first upper side 5a and slightly shorter than the first upper side 5a.

As shown in FIG. 1, the holding portion 6 constituting one base material of the holder 4 mainly includes an upper adhesive portion 7, a central adhesive portion 8, arm portions 9, 9, and a hook portion 10.
The upper adhesive portion 7 is formed in a horizontal strip shape on the upper portion of the holder 4 along the upper side 6a.
The central adhesive portion 8 is formed downward from approximately the center of the upper adhesive portion 7 in the left-right direction.

As shown in Fig. 2, the arm portions 9 are formed in a band shape with a predetermined width by outer peripheral edges 16x, 17x and inner peripheral edges 16y, 17y formed by incisions and perforations (or folds). The arm portions 9 are formed in a substantially V-shaped band shape on both the left and right sides of the central adhesive portion 8, and then extend in a band shape in the left-right direction along the upper adhesive portion 7, spaced apart from each other.

The hook portion 10 is a band-like portion having a predetermined width and formed by outer peripheral edges 21x, 22x, 23x and inner peripheral edges 21y, 22y, 23y shown in Fig. 1, which are formed by continuous cuts in the outer peripheral edge 17x and inner peripheral edge 17y of the arm portion 9. The hook portion 10 is formed so as to surround the side and lower peripheries of the arm portions 9, 9.

A detailed explanation of each part is as follows:
As shown in Fig. 1, the upper adhesive part 7 is a part sandwiched between the upper side 6a and an imaginary straight line L1 that extends including the horizontally extending outer periphery of the arm part 9. The upper adhesive part 7 is adhered to the filter body 3 so as not to separate from the filter body 3 as a whole. As shown in Fig. 3, the upper adhesive part 7 forms and holds the opening 2 when the filter body 3 is opened.

As shown in Figure 2, the upper adhesive portion 7 has multiple folds f1 that facilitate the formation of an arc shape when the filter body 3 is opened. In this embodiment, four folds f1 are formed symmetrically about the center line L2 in the width direction of the holder 4. The two inner folds f1 are inclined lines that form a predetermined angle θ1 with respect to the center line L2. The two outer folds are formed so as to form an angle θ2 with respect to the center line L2 that is slightly larger than θ1. As a result, the left and right inner folds f1 and outer folds f1 are each formed to widen upward.

1 , the central adhesive part 8 extends downward from the middle position in the left-right direction of the upper adhesive part 7 in a narrow, elongated, approximately inverted triangular shape. The lines extending in an approximately V shape form valley fold lines 15. The central adhesive part 8 is attached to the filter body 3 at least at its upper and lower parts, and covers the filter body 3 as a whole with almost no separation therebetween.

The valley fold line 15 is a boundary that separates the central adhesive portion 8 from the arm portion 9, and constitutes the outer peripheral edge 16x of the arm portion 9 shown in Fig. 2. The valley fold line 15 is formed by an embossed straight line or an intermittent or broken line cut, including a shallow cut, thereby preventing the central adhesive portion 8 from separating from the inside of the arm portion 9 and facilitating folding.

The angle formed by the valley fold lines 15, 15 is set to be equal to or greater than 6 degrees and less than 90 degrees, preferably equal to or greater than 10 degrees and less than 60 degrees, and even more preferably equal to or greater than 20 degrees and less than 40 degrees.

If the angle between the valley fold lines 15, 15 is less than 6 degrees, the arm portions 9 rise in a substantially vertical direction, and therefore, when the filter body 3 is opened and liquid is poured into it, the arm portions 9 are likely to bend in an outward arc due to the weight of the liquid. Also, if the angle between the valley fold lines 15, 15 is 90 degrees or more, it becomes difficult to raise the hook portion 10.

However, if the angle between the valley fold lines 15, 15 is 10 degrees or more, the fold is difficult to bend, and if it is 20 degrees or more, the fold is hardly bent at all. Also, if the angle between the valley fold lines 15, 15 is 80 degrees or less, the hook portion 10 is easily raised, and if it is 20 degrees or more and 60 degrees or less, the fold is moderately easy to pull out.
In this embodiment, the angle formed by the valley fold lines 15, 15 is set to 40 degrees.

2, the arms 9 are formed into a generally V-shaped band with upper portions jutting out to the left and right, with outer peripheral edges 16x, 17x formed by perforations and cuts and inner peripheral edges 16y, 17y formed by cuts. The generally V-shaped portions of the arms 9 are referred to as V-shaped portions 16, and the upper portions jutting out to the left and right at the upper ends of the V-shaped portions 16 are referred to as shoulder portions 17.

The outer peripheral edge 16x of the arm portion 9 extends at an incline in a direction expanding upward relative to the center line L2 of the holder due to the perforations, then changes to a notch as the outer peripheral edge 17x, extending in a substantially horizontal direction away from the center line L2, and bends when it comes a predetermined distance close to the second upper edge 6b, extending parallel to the second upper edge 6b.

The inner peripheral edge 16y of the arm portion 9 extends horizontally, continuing into the curved notches on the left and right sides of the lower end of the outer peripheral edge 16x, and then extends linearly in a direction expanding upward relative to the center line L2, forming a V-shaped portion 16 together with the perforations on the outer peripheral edge 16x.
The inner peripheral edge 17y bends from the upper end of the V-shaped inner peripheral edge 16y in a substantially horizontal direction, extends away from the center line L2, and together with the outer peripheral edge 17x forms a shoulder 17. The inner peripheral edge 17y forming the shoulder 17 is horizontal in the left-right outward direction or is inclined very slightly upward.

The inner peripheral edges 16y, 17y and the outer peripheral edges 16x, 17x are formed as a continuous whole.
The arm portions 9, 9 are fixed to the filter body 3 at the valley fold lines 15, 15 shown in FIG. 1, but their back surfaces are not attached to the filter body 3 and are able to rise from the valley fold lines 15 as base ends.

The hooking portion 10 is formed by connecting an upper pressing portion 21 extending downward from both ends of the symmetrical shoulder portions 17, a lower pressing portion 22 extending diagonally downward approximately along the lower edge of the filter body 3, and a horizontally extending bottom portion 23.
These upper pressing portion 21, lower pressing portion 22 and bottom portion 23 are formed by an outer peripheral edge 21x shown in FIG. 1, which is formed continuously with the outer peripheral edge 17x of the arm portion 9 shown in FIG. 2, and an inner peripheral edge 21y shown in FIG. 1, which is formed continuously with the inner peripheral edge 17y of the arm portion 9 shown in FIG. 2.

As shown in FIG. 1 or 2, an upper folding line 25 is formed between the upper pressing portion 21 and the shoulder portion 17, and is a mountain fold when viewed from the front surface side of the holder 4.
The upper folding line 25 extends linearly downward from a point p1 on the outer peripheral edge 17x of the arm portion 9, tilting slightly toward the center line L2, until it reaches a point p2 on the inner peripheral edge 17y (more specifically, the intersection of the inner peripheral edge 17y of the arm portion 9 and the inner peripheral edge 21y of the upper pressing portion 21). The upper folding line 25 is formed by embossing or perforation.

The length of the upper folding line 25 preferably extends from the starting point p1 in the range of one-half to four-fifths of the length from the starting point p1 to the intersection p2, more preferably one-half to three-quarters of the length from the starting point p1, and most preferably about two-thirds of the length from the starting point p1.

The upper pressing portion 21 extends horizontally apart from the V-shaped portion 16 of the arm portion 9 , and extends to just before the height of the lower end of the V-shaped portion 16 .
The outer peripheral edge 21x of the upper holding portion 21 extends parallel to the second upper edge 5b of the filter body 3 by a cut that continues from the outer peripheral edge 17x of the shoulder portion 17, forming a shape that causes the upper part of the upper holding portion 21 to protrude outward, and then extends downward at an angle that slightly narrows the width dimension of the upper holding portion 21.
The inner peripheral edge 21y of the upper pressing portion 21 is formed by perforation or embossing on an extension of the upper folding line 25 from the intersection p2, forming a flap folding line f2.

A rectangular pressing flap 27 is connected to the flap folding line f2. The pressing flap 27 extends over the entire flap folding line f2 and protrudes toward the V-shaped portion 16.

The lower holding portion 22 extends continuously from the upper holding portion 21, approximately parallel to the lower edge 5c of the filter body 3, and is connected to both ends of the bottom portion 23, by means of an outer peripheral edge 22x formed by a cut continuing from the outer peripheral edge 21x of the upper holding portion 21, and an inner peripheral edge 22y formed by a cut continuing from the flap folding line f2 of the upper holding portion 21.

The bottom portion 23 is formed into an approximately rectangular shape extending horizontally at the bottom of the holder 4, with an outer peripheral edge 23x consisting of a notch that extends downward from the lower end of the outer peripheral edge 22x of the lower holding portion 22 and then connects the tips that extend downward, and an inner peripheral edge 23y consisting of a notch that connects the lower ends of the inner peripheral edges 22y of the lower holding portion 22.

The portion sandwiched between the upper pressing portion 21, the lower pressing portion 22 and the bottom portion 23 of the hanging portion 10 and the arm portion 9 forms the inner adhesive portion 28, which is configured to mainly maintain the conical shape of the filter body 3.
With the above-described configuration, the hook portion 10 is formed in a substantially V-shape, surrounding the arm portions 9 and the inner adhesive portion 28 from the outside.

The hanging portion 10 is not attached to the filter body 3, and as described above, the outer peripheral edge 21x etc. and the inner peripheral edge 21y etc. are each formed by a continuous cut, so that it can be lifted up and separated from the filter body 3.

Furthermore, in this embodiment, the holding portion 6 has side adhesive portions 19 formed on the outside of the hanging portion 10, continuing from both ends of the upper adhesive portion 7, and supporting the sides shown in Figure 3 when the filter body 3 is opened.
As shown in FIG. 2, the side adhesive portion 19 has a side upper support portion 30 adjacent to the shoulder portion 17 and a side center support portion 31 formed along the upper pressing portion 21 and the lower pressing portion 22.

The side upper support parts 30 extend substantially along the second upper edge 5b, at least a portion of which is affixed to the filter body 3, and are parts that support the sides of the opening 2 shown in Fig. 3. The side center support parts 31 extend downward from the vicinity of the left and right corners along the lower edge 5c and are affixed to the filter body 3, and are parts that sandwich the lower edge 5c shown in Fig. 2 and support the sides in the vertical direction when the filter body 3 is open.
In this embodiment, almost the entire upper side support portion 30 and the central side support portion 31 are adhered to the filter body 3 .

Next, the use and operation of the beverage extraction filter 1 will be described.
To install the beverage extraction filter 1 shown in Fig. 1 in the container 100 shown in Fig. 3, grasp the bottom 23 of the hooking portion 10 of the holder 4 as shown in Fig. 1 and lift it up from the filter body 3 so that the top and bottom bases 23 separate from each other. This causes the shoulder 17 to move slightly away from the filter body 3, and the hooking portion 10 to rise slightly diagonally, opening the opening 2 slightly.

In this state, the beverage extraction filter 1 is placed above the container 100, and the back surface of the base portion 23 (the surface facing the filter body 3) is placed against the outer periphery of the container 100 and pressed downward. As a result, the lower pressing portion 22, which expands upward, smoothly slides along the outer periphery of the container 100, and the outside of the shoulder portion 17 gradually moves further away from the filter body 3. In this way, the pair of hooking portions 10 are expanded radially of the container 100.

When the pair of hooking portions 10, 10 is widened, the arms 9, 9 connected to the hooking portion 10 are also pulled by the hooking portion 10, and as shown in Figure 3, the holder 4 tends to bend at the fold f1, forming a curve in the opening 2. Then, the upper adhesive portion 7 faces roughly the front or back, and the upper side support portion 30 faces roughly the side, and the filter body 3 opens wide in a conical shape.

At this time, while the valley fold line 15 forming the V-shaped portion 16 is fixed to the filter body 3, the inner peripheral edge 16y rises and the shoulder portion 17 also moves away from the filter body 3. As a result, as the hooking portions 10 move away from each other, the arm portions 9 are pulled so as to separate the sheet base materials 5 over substantially the entire vertical direction, and the entire filter body 3 is securely opened.

When the upper holding portion 21 approaches the opening of the container 100, since the upper holding portion 21 has a holding flap 27 on the inside and extends almost vertically in the vertical direction while being slightly inclined, the upper holding portion 21 can be pressed down with a force slightly stronger than when the lower holding portion 22 is attached, so that the upper holding portion 21 covers the peripheral surface of the container 100.

In this case, since an upper bending line 25 is provided between the upper holding portion 21 and the shoulder portion 17, even when the upper holding portion 21 is hung on a large-diameter container 100 as shown in Figure 4, its back surface will be slightly tilted so that it fits along the circumferential surface of the container 100, and a spring force (repulsion force) will act on the upper holding portion 21, causing it to return to its original flat shape due to the part where the upper bending line 25 is not formed.

3, when the hooking part 10 is pressed down until the inner peripheral edge 17y of the shoulder part 17 abuts the upper end of the container 100, the upper pressing part 21 tries to cover the peripheral surface of the container 100, and the spring force acts to press down on the container 100. If the upper folding line 25 is not formed between the shoulder part 17 and the upper pressing part 21, the shoulder part 17 rises significantly, particularly in the case of a large-diameter container, and the upper pressing part 21 will bend back against the container 100, reducing the fit of the hooking part 10 and the holding power for the container 100.

However, the holder 4 has an upper fold line 25 formed at the boundary between the shoulder 17 and the upper pressing portion 21, which is approximately two-thirds the width of the shoulder 17, and no crease is formed in the remaining portion, so that the upper pressing portion 21 is prevented from warping back against the container 100, and the holder 4 can be stacked on the container 100. This has the effect of increasing the holding power of the holder 4.

Furthermore, since the hooking portion 10 is fixed to the peripheral surface of the container 100, a spring force acts in the direction of keeping the filter body 3 open, making it easier to maintain the filter body 3 firmly held.
In other words, if the upper folding line 25 shown in Figure 1 is formed all the way from the starting point p1 to the intersection p2, the shoulder portions 17, 17 will be easily bent completely at the upper folding line 25, and the tension on the upper pressing portion 21 will be reduced.
Therefore, when molten metal is poured into such a filter body 3, the filter body 3 is likely to sag into the container 100 as shown in FIG. 5(a).

However, in the holder 4 of the present application, no folds are formed in the remaining approximately one-third, and therefore, when molten metal is poured into the filter body 3 and weight is applied, tension is generated in the portion where the upper fold line 25 is not formed at the boundary between the shoulder portion 17 and the upper pressing portion 21. Therefore, by keeping the shoulder portion 17 tensioned relative to the upper pressing portion 21, the filter body 3 can be prevented from sagging downward, as shown in Figure 5(b).
In this way, by pulling down the hook portion 10 until the upper end of the container 100 abuts against the inner peripheral edge 17y of the shoulder portion 17, the hook portion 10 can firmly grip the container 100.

Furthermore, the hooking part 10 has the upper pressing part 21 that follows the upper folding line 25 and the pressing flap 27 that can rise up relative to the upper pressing part 21, so that these can be aligned along the outer circumferential surface of the container 100 to further enhance adhesion to the outer circumferential surface. Therefore, the effect of firmly fixing the hooking part 10 to the outer circumferential surface of the container 100 is further strengthened.

Furthermore, when the hooking part 10 is hung on the container 100, the outer peripheral edge 16x of the V-shaped part 16 is fixed to the filter body 3, so that the outer peripheral edge 17x of the arm part 9 rises in a V shape relative to the center line L2. The parts extending on both the left and right sides of the arm part 9 of the inner adhesive part 28 shown in Fig. 1 support the conical shape of the filter body in the up-down direction, and the side center support part 31 spaced apart from them supports the central part of the side in the up-down direction when the central adhesive part 8 is viewed as the front (or back) side.
This structure has the effect that the V-shaped portion 16, the inner adhesive portion 28 and the side adhesive portion 19 can maintain the conical shape of the filter body 3 well.

Furthermore, the beverage extraction filter 1 can have the shoulder portion 17 strongly bite into the container 100, and the hooking portion 10 can be fitted to conform to the outer circumferential surface of the container 100. Furthermore, the upper pressing portion 21 and the pressing flap 27 of the hooking portion 10 can improve adhesion to the container 100.
Therefore, the beverage extraction filter 1 can be fixed to the container 100 more firmly and stably.

In the above embodiment, the outer peripheral edge 16x of the V-shaped portion 16 may have a structure including an upper side portion 35 that tapers sharply downward and a lower side portion 36 that tapers gently downward, as shown in Fig. 6. In other words, the V-shaped portion 16 may have a shape that widens in two stages, expanding from bottom to top and then narrowing thereafter.

When the outer periphery 16x of the V-shaped portion 16 is expanded in two stages as described above, the shoulder portion 17 rises slightly more easily while the arm portion 9 is formed in a V-shape, which results in a stronger adhesion of the hooking portion 10 to the outer periphery of the container 100. Therefore, the beverage extraction filter 1B is effectively fixed firmly to the container 100.

The present invention may also be a beverage extraction bag in which a beverage extraction ingredient such as ground coffee beans is placed inside the filter body 3 of the beverage extraction filter 1 of the present invention, including the embodiments exemplified above, and the opening 2 is sealed.

DESCRIPTION OF SYMBOLS 1 beverage extraction filter 2 opening 3 filter body 4 holder 7 upper adhesive portion 8 central adhesive portion 9 arm portion 10 hook portion 21 upper pressing portion 22 lower pressing portion 25 upper folding line 27 pressing flap 100 container

Claims (6)

a holder including a bag-shaped filter body having a pair of base materials facing each other; an upper attachment part that is attached to the outer surface of the filter body so as to face the outer surface and is attached horizontally to the upper part of the filter body; a central attachment part that extends downward from the center of the horizontal direction of the upper attachment part; arm parts that extend upward in a V-shape along both side edges of the central attachment part and then extend in the left and right directions so as to be separated from each other at their upper ends; and hook parts that are continuous with the two arm parts and the left and right ends of the arm parts and are formed so as to surround the sides and below the arm parts, and are spaced from the filter body and can be hooked onto the outer peripheral surface of a container,
A beverage extraction filter has an upper fold line that extends vertically at the boundary between the tip of the shoulder portion extending in the left-right direction of the arm portion and the upper holding portion of the hanging portion extending downward from both ends of the shoulder portion, and that folds the upper part of the hanging portion in a mountain fold so that it fits the container. The beverage extraction filter according to claim 1 , wherein the upper folding line extends from the outer periphery of the border to a position not reaching the inner periphery. 3. The beverage extraction filter according to claim 2, wherein the upper folding line is formed to have a dimension that is between one half and three-quarters of the distance from the outer peripheral edge to the inner peripheral edge on the extending line. The hooking portion has an upper pressing portion that extends downward with the extension of the upper folding line as its inner peripheral edge and is aligned with the upper portion of the container, and a lower pressing portion that tapers from the lower end of the upper pressing portion toward the center in the width direction and is connected to the lower portion,
The beverage extraction filter according to any one of claims 1 to 3, wherein the upper holding portion protrudes toward the arm portion via an upper folding line on its inner peripheral edge and has a holding flap that can rise up around the upper folding line according to the shape of the peripheral surface of the container. The beverage extraction filter according to claim 4, wherein the pressing flap is formed in a rectangular shape with the upper folding line as a longitudinal direction. A beverage extraction bag comprising a beverage extraction filter according to any one of claims 1 to 3 and claim 4 which cites claim 1 and in which a beverage extraction ingredient is enclosed.