Extraction bag

Abstract

To provide a sufficient length in a grip part in an extraction bag of a tea bag type for obtaining extraction liquid by immersing a bag body filled with an extraction material such as coffee powder in hot water.SOLUTION: An extraction bag 1A includes a bag body 3 formed of a water permeable filter sheet 30, a thin plate-like member 10 provided on the outer surface of the bag body 3, and an extraction material M filled in the bag body 3. The thin plate-like member 10 includes a first grip part 11 and a second grip part 21. The first grip part 11 and the second grip part 21 in which one end parts of the grip parts are fixed ends 12, 22, and the other end parts are free ends 13, 23, are pulled up from the bag body 3 in opposite directions to each other and can be engaged by pulling up. In plan view, in the first grip part 11, the free end 13 protrudes from the edge side 4 of the bag body 3, and the edge side 4 is a folding ridge of the water permeable filter sheet 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an extraction bag in which an extraction material packed in a bag body made of a water-permeable filter sheet is immersed in hot water to obtain an extract. [Background technology]

[0002] Conventionally, tea bags, in which tea leaves are filled in a water-permeable bag body with a hanging thread, have been widely used to easily make beverages such as green tea, black tea, and oolong tea. For coffee, in addition to drip-type extraction bags in which hot water is poured onto coffee powder, tea bag-type coffee extraction bags in which the bag body filled with coffee powder is immersed in hot water are also used. However, even if you try to immerse a tea bag-type coffee extraction bag in hot water, the bag body filled with coffee powder tends to float up in the hot water because the coffee powder contains carbon dioxide, making it difficult to extract the coffee sufficiently. Therefore, a hook piece formed of a thin plate-like member has been attached to one side of the bag body filled with coffee powder, and the hook piece can be hooked onto the edge of a cup so that the bag body filled with coffee powder does not float up in the hot water (Patent Document 1).

[0003] However, in a conventional coffee extraction bag in which a bag body filled with coffee powder is immersed in hot water, even if an attempt is made to forcibly submerge the bag body, which is about to rise, in the hot water by gripping a hook piece or a gripping portion formed of a thin plate-like member, the thin plate-like member bends or warps, making it difficult to submerge the bag body in the hot water. Even if the hook piece or the gripping portion is moved up and down in order to promote coffee extraction, the bag body does not move up and down in the hot water in the same way as the gripping portion. In addition, even if the bag body is temporarily submerged in hot water, only the surface layer of the entire coffee powder filled in the bag body swells with the hot water, and the hot water does not easily penetrate into the entire coffee powder. For this reason, with a tea bag type extraction bag in which the bag body is immersed in hot water, it is difficult to obtain a coffee liquid of the same strength as a drip type in the same time or less as the drip type.

[0004] In response to this, the applicant of the present application has proposed that in a teabag-type extraction bag in which a thin plate member is attached to a bag body filled with an extraction material, the thin plate member is attached to one surface of the bag body, and a pair of grip parts that can be lifted up from the bag body are formed so as to be engageable with the thin plate member (Patent Document 2). With this extraction bag, the bag body can be easily submerged in hot water or moved up and down in the hot water, and the bag body can be stably maintained immersed in hot water even if the extraction bag is released, so that a sufficiently strong extraction liquid can be easily obtained. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3140084 [Patent Document 2] Patent No. 7228947 Summary of the Invention [Problem to be solved by the invention]

[0006] However, according to the extraction bag described in Patent Document 2, since the pair of grips are formed from a thin plate-like member on one surface of the bag body, it is difficult to ensure that the grips are long enough. Therefore, when the grip of the extraction bag in hot water is picked up by the hand, there is a risk that the hand will feel hot due to the hot air from the hot water.

[0007] In contrast, the present invention aims to industrially produce a tea bag-type extraction bag in which an extract is obtained by immersing a bag body filled with an extraction material such as coffee powder in hot water, where the bag body has a handle that makes it easy to submerge the bag body in hot water or move it up and down in the hot water, and where the handle is sufficiently long so that a hand holding the handle does not feel hot due to the heat from the hot water. [Means for solving the problem]

[0008] The inventors of the present invention conceived that when forming a pair of handle parts from a thin plate-like member for a tea bag-type extraction bag, which are raised from the bag body and engage with each other, one of the handle parts is formed from a thin plate-like member that spans the edge of the bag body and extends to the front and back of the bag body to ensure its length, and in this case, if the free end of the handle part is made to protrude from the edge of the bag body, it can be picked up at a position farther from the water surface than the handle part of the extraction bag described in Patent Document 2, so that heat is less likely to be felt, and that extraction bags with handle parts of sufficient length in this way can be manufactured industrially using conventional filling and packaging machines, and thus completed the present invention.

[0009] That is, the present invention provides an extraction bag having a bag body formed from a water-permeable filterable sheet, a thin plate-like member provided on the outer surface of the bag body, and an extraction material filled in the bag body, The thin plate member includes a first gripping portion and a second gripping portion, The first gripping portion and the second gripping portion each have one end as a fixed end and the other end as a free end, and are raised in opposite directions from the bag body and can be engaged by being raised; In a plan view, the first gripping portion has a free end protruding from an edge of the bag body, The edge of the bag body is formed into a fold of the water-permeable filterable sheet to provide an extraction bag. Effect of the Invention

[0010] According to the extraction bag of the present invention, the first and second gripping parts, which are made of a thin plate-like member provided on the outer surface of the bag body filled with the extraction material, can be raised and engaged with each other, and after engaging them, the gripping parts can be grasped to submerge the bag body in hot water or move the bag body up and down in hot water. Therefore, the bag body spreads horizontally and extraction can be performed with the extraction material spread horizontally, so that the hot water can permeate the entire bag body, not just the surface, of the extraction material, promoting extraction.

[0011] In this case, the first gripping portion has a free end that protrudes beyond the edge of the bag body, and can be formed to be longer than the second gripping portion accordingly. Therefore, when the extraction bag is immersed in hot water, the first gripping portion can be held at a position farther away from the surface of the hot water, thereby reducing or eliminating the effects of hot air. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view, a side view, and a rear view of an extraction bag 1A according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of the extraction bag 1A of the embodiment in a state where the first gripping portion and the second gripping portion are raised and engaged with each other. [Diagram 3] FIG. 3 is a perspective view of an extraction bag 1A of the embodiment being immersed in hot water in a cup and moved up and down. [Figure 4] FIG. 4 is a plan view of a sheet for producing the extraction bag 1A of the embodiment. [Diagram 5] FIG. 5 is an explanatory diagram of a method for producing the extraction bag 1A of the embodiment. [Figure 6] FIG. 6 is a plan view and a rear view of the extraction bag 1B of the embodiment. [Figure 7] FIG. 7 is a perspective view of the extraction bag 1B of the embodiment in a state where the first gripping portion and the second gripping portion are raised and engaged with each other. [Figure 8] FIG. 8 is a plan view and a rear view of the extraction bag 1C of the embodiment. [Figure 9] FIG. 9 is a plan view of a manufacturing sheet for the extraction bag 1C of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will now be described in detail with reference to the drawings, in which the same reference numerals denote the same or equivalent components.

[0014] (Overall composition) Fig. 1 shows a plan view, a side view and a back view of an extraction bag 1A according to an embodiment of the present invention, in a state in which the first and second gripping portions 11, 21 included in the thin plate-like member 10 are not raised. In Fig. 1, the area filled with diagonal lines represents the adhesion area between the thin plate-like member 10 and the bag body 3, and the area filled with dots represents the surface of the bag body 3. Note that in the present invention, the adhesion area is not limited to the embodiment shown in the figures. FIG. 2 is a perspective view of the extraction bag 1A with the first gripping portion 11 and the second gripping portion 21 raised and engaged, and FIG. 3 is a perspective view of the extraction bag 1A shown in FIG. 2 immersed in hot water in a cup and being moved up and down.

[0015] The extraction bag 1A includes a bag body 3 which is a flat bag formed of a water-permeable filter sheet, a thin plate-like member 10 provided on the outer surface of the bag body 3, and an extraction material M filled in the bag body 3.

[0016] The thin plate-like member 10 includes a first gripping portion 11 and a second gripping portion 21 that can be raised from the bag body 3. That is, the first gripping portion 11 and the second gripping portion 21 are formed by cutting into the thin plate-like member 10 so that one end of each of the first gripping portion 11 and the second gripping portion 21 is a fixed end 12, 22 and the other end is a free end 13, 23 and raised from the bag body 3. The remaining areas of the first gripping portion 11 and the second gripping portion 21 of the thin plate-like member 10 are attached to the bag body 3 and serve as support portions that support the raised gripping portions 11, 21 to the bag body 3. Note that, in FIG. 1, almost the entire remaining areas of the first gripping portion 11 and the second gripping portion 21 of the thin plate-like member 10 are attached to the bag body 3, but the present invention is not limited to this. The remaining region may be attached to the bag body 3 so as to function as a support portion for the first grip portion 11 and the second grip portion 21 to be raised.

[0017] On the other hand, the fixed ends 12, 22 of the first gripping portion 11 and the second gripping portion 21 are formed on one surface of the bag body 3. The first gripping portion 11 and the second gripping portion 21 are not attached to the bag body 3 except for the fixed ends 12, 22. A fold line Lf1 is formed on the fixed ends 12, 22 so that the fixed ends 12, 22 serve as axes for raising. This fold line Lf1 extends across the entire width of the thin plate-like member 10 except for the raised portions of the first gripping portion 11 and the second gripping portion 21. The fold line Lf1 can be formed by perforation, half cutting, creasing, or the like.

[0018] The first gripping part 11 and the second gripping part 21 are raised in opposite directions from each other from the bag body 3. Here, "raised in opposite directions from each other from the bag body 3" means that the fixed ends 12, 22 that serve as axes for raising the first gripping part 11 and the second gripping part 21 are parallel to each other, and the raising directions θ1, θ2 with respect to the fixed ends 12, 22 are opposite to each other.

[0019] The first gripping portion 11 and the second gripping portion 21 are formed alternately in the thin plate-like member 10 so that the lengths of the first gripping portion 11 and the second gripping portion 21 raised in opposite directions from the bag body 3 can be increased. That is, in the thin plate-like member 10, a region on one surface of the bag body 3 where the fixed end 12 of the first gripping portion 11 and the fixed end 22 of the second gripping portion 21 are provided is equally divided in half in the longitudinal direction of the bag body 3 into a first region R1 and a second region R2, and when the fixed end 12 of the first gripping portion 11 is in the first region R1 and the fixed end 22 of the second gripping portion 21 is in the second region R2, the first gripping portion 11 extends from the fixed end 12 into the second region R2, the fixed end 22 of the second gripping portion 21 is in the second region R2, and the second gripping portion 21 extends from the fixed end 22 into the first region R1. The fixed end 12 of the first gripping portion 11 and the fixed end 22 of the second gripping portion 21 are spaced apart in the longitudinal direction of the bag body 3 by a distance D1.

[0020] Furthermore, the free end 13 of the first gripping portion 11 protrudes from the edge 4 of the bag body 3 in a plan view.

[0021] The water-permeable filterable sheet 30 forms a fold at the edge 4 of the bag body 3 from which the free end 13 of the first gripping portion 11 protrudes. The thin plate-like member 10 is fixed to the bag body 3 at a peripheral region 14 of the free end 13 of the first gripping portion 11, and the peripheral region 14 has a fold 14a that overlaps with the edge 4 of the bag body 3. That is, the fold of the water-permeable filterable sheet 30 and the fold of the thin plate-like member 10 overlap with each other. At the fold 14a of the thin plate-like member 10, the thin plate-like member 10 may be curved, and a sharp fold line is not necessary. Also, the first gripping portion 11 and the second gripping portion 21 have no fold lines formed other than at the fixed ends 12, 22.

[0022] The fixed end 12 of the first gripping portion 11 and the fixed end 22 of the second gripping portion 21 do not overlap in the longitudinal direction of the bag body 3, but since the first gripping portion 11 and the second gripping portion 21 have sides that extend diagonally beyond the center line L0 of the width of the bag body 3, there are overlapping portions in the longitudinal direction of the bag body 3 at a portion near the free end 13 of the first gripping portion 11 and a portion near the free end 23 of the second gripping portion 21. In the lateral direction of the bag body 3, the overlapping width W1 between the first gripping portion 11 and the second gripping portion 21 is preferably 50% or more of the width W0 of the thin plate-like member 10.

[0023] Further, notches 15, 25 are formed in the portion of the first gripping portion 11 near the free end 13 and the portion of the second gripping portion 21 near the free end 23 within the overlapping width W1.

[0024] Therefore, as shown in FIG. 2, when first gripping portion 11 and second gripping portion 21 are raised and engaged with each other at notches 15, 25, the engaged state between first gripping portion 11 and second gripping portion 21 becomes stable.

[0025] (extraction material) Examples of the extraction material filled in the bag body 3 include coffee powder, tea leaves such as black tea and green tea, and herbal medicines. Generally, when coffee powder is filled in the bag body 3 and immersed in hot water, the bag body is likely to float due to the carbon dioxide contained in the coffee powder, making it difficult to extract. However, according to the present invention, by gripping the gripping portion of the thin plate-like member provided on one side of the bag body, it is easy to submerge the bag body in hot water from the other side of the bag body or to move it up and down in the hot water. Furthermore, when the bag body is submerged in hot water, the other side can be turned down or even spread out horizontally, so that the coffee powder spreads over a wide area in the bag body and the head space also expands. Therefore, hot water can easily permeate the entire coffee powder in the bag body, and an extract can be efficiently obtained from the entire coffee powder. For extraction materials other than coffee powder, hot water can be similarly permeated into the extraction material to efficiently obtain an extract from the entire extraction material.

[0026] In the extraction bag of the present invention, the extraction material is used in a sealed state within the bag body 3, so that the extraction material will not scatter outside the bag body when the extraction bag is used.

[0027] (Bag body) In this embodiment, the shape of the bag body 3 is a flat bag. In the present invention, the shape of the bag body 3 is not limited to a flat bag, and may be, for example, a gusseted bag having a gusset at the bottom or side. The shape of the bag body in a plan view is also not limited to a rectangle, and may be a circle, etc.

[0028] The net planar dimensions of the bag body 3 can be appropriately set according to the size of a cup or container used when obtaining an extract using the extraction bag. For example, the bag body 3 may be sized to fit a commercially available coffee cup.

[0029] (Water-permeable filter sheet) As the water-permeable filterable sheet forming the bag body, various ones having water permeability and filterability can be used so that they can be used for extracting the extraction material, and the constituent material of the water-permeable filterable sheet can be appropriately selected according to the type of the extraction material. For example, generally, as water-permeable filterable sheets for extracting beverages, woven or nonwoven fabrics made of synthetic fibers such as polyester, nylon, polyethylene, polypropylene, vinylon, etc., semi-synthetic fibers such as rayon, natural fibers such as paper mulberry and mitsumata, mixed papers made of Manila hemp, wood pulp, polypropylene fibers, etc., and papers such as tea bag base paper are known, and these can also be used in the present invention. From the viewpoint of disposal after use of the extraction bag, it is preferable to include biodegradable fibers in the water-permeable filterable sheet. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, polyethylene succinate, etc. In addition, from the viewpoint of imparting transparency to the water-permeable filterable sheet so that the state of the extraction material in the bag body can be seen, it is preferable to reduce the content of inorganic pigments or to avoid containing inorganic pigments.

[0030] In addition, in the case of a drip-type extraction bag, hot water is poured directly onto the brewing material, whereas in the case of a tea bag-type extraction bag of the present invention, hot water is always supplied to the brewing material through the water-permeable filter sheet 30. Therefore, it is preferable to use a water-permeable filter sheet with a coarser mesh than that used in the drip-type extraction bag, provided that there is no leakage of the brewing material M powder. For example, when coffee powder is used as the brewing material, the air permeability of the water-permeable filter sheet is 130 to 600 cm. 3 / cm 2 / sec (JIS L1096 Air Permeability Method A (method using a Frazier type air permeability tester)).

[0031] (Thin plate member) The thin plate member 10 is preferably water repellent and can be formed by punching out a thin plate material such as a paperboard with a resin laminated surface, a plastic sheet, etc. From the viewpoint of disposability after use of the extraction bag 1A, it is preferable that the thin plate member 10 is formed from a biodegradable material such as polylactic acid, polybutylene succinate, polyethylene succinate, etc.

[0032] (How to use) The extraction bag 1A is preferably packaged and distributed in a state in which the thin plate-like member 10 is flattened on the bag body 3 as shown in Fig. 1. To use the bag in this state, first, as shown in Fig. 2, the first gripping portion 11 and the second gripping portion 21 of the thin plate-like member 10 are lifted from the bag body 3, and the ends of the thin plate-like member 10 are switched so that the front and rear portions are engaged with each other. Next, the free end 13 of the first gripping portion 11 is picked up, and the bag body 3 is placed in a container 100 such as a cup from the side opposite to the side on which the thin plate-like member 10 is provided, as shown in Fig. 3, and hot water is poured into the bag body 3, so that the bag body 3 is immersed in the hot water A and the bag body 3 is moved up and down in the hot water A. In this case, even if the fixed end of the first gripping portion and the fixed end of the second gripping portion are fixed within a single plane of the bag body, the free end 13 of the first gripping portion 11 is farther from the water surface than the free end 23 of the second gripping portion 21, so the effect of hot air on the fingertips is reduced or eliminated.

[0033] In the hot water, the bag body 3 spreads horizontally, and the brewing material in the bag body 3 also spreads over a wide area. Therefore, the hot water A permeates the entire brewing material.

[0034] In particular, in this extraction bag 1A, the fixed end 12 of the first gripping portion 11 and the fixed end 22 of the second gripping portion 21 are spaced apart, and the fold line Lf1 formed on these fixed ends 12, 22 is formed across the entire width of the thin plate-like member 10, except for the raised portions of the first gripping portion 11 and the second gripping portion 21, so that the thin plate-like member 10 is bent into a trapezoid, ensuring a headspace in the bag body 3 and promoting extraction.

[0035] When the extraction bag 1A is moved up and down with the hand holding the first gripping portion 11, the bag body 3 maintains a head space that spreads approximately horizontally, and hot water repeatedly flows in and out of the bag body 3 from the surface of the bag body 3, thereby further promoting extraction.

[0036] Alternatively, the extraction bag may be placed in a container 100 containing hot water, and the extraction bag 1A may be similarly moved up and down to perform extraction.

[0037] If necessary, the first gripping portion 11 and the second gripping portion 21 may be released and the extraction bag 1A may be left in the container 100 such as a cup. In this case, the extraction bag can be stably maintained in a state in which the first gripping portion 11 and the second gripping portion 21 stand up from one side of the bag body and the opposite side faces downward. Therefore, extraction can be continued while the bag is left alone. Also, by maintaining the first gripping portion 11 and the second gripping portion 21 in an upright state, these gripping portions may be grasped again to move the bag body 3 up and down in hot water to promote extraction. The above mentioned extraction method may be carried out with cold water.

[0038] After extraction, the extraction bag can be easily removed from the container by gripping the first grip portion 11 and the second grip portion 21.

[0039] Thus, with this extraction bag 1A, an extract of a desired strength can be obtained simply and quickly, and the problem of hot air from hot water when gripping the extraction bag 1A can be reduced or eliminated.

[0040] (Manufacturing method) As a method for producing the extraction bag 1A, for example, as shown in Fig. 4, the longitudinal direction of the thin plate-like members 10 shown in Fig. 1 is aligned with the width direction of a long water-permeable filterable sheet 31, and the edge 4 of the bag body 3 from which the free end 13 of the first gripping portion 11 protrudes is aligned with the center line L1 of the width of the water-permeable filterable sheet 31 to prepare an extraction bag manufacturing sheet 40A. In the figure, the area sandwiched between the two-dot chain lines is used for manufacturing one extraction bag 1A.

[0041] In this case, it is preferable that the free ends 13 of the first gripping parts 11 protruding from the edge 4 are arranged alternately on the left and right sides of the center line L1 of the water-permeable filterable sheet 31. This makes it possible to prevent the roll around which the extraction bag manufacturing sheet 40A is wound from becoming cone-shaped, and allows the extraction bag manufacturing sheet to be smoothly unwound from the roll.

[0042] The extraction bag manufacturing sheet 40A can be used in a packaging and filling machine to continuously manufacture the extraction bags 1A. In this case, as shown in FIG. 5, the extraction bag manufacturing sheet 40A is folded in half so that both longitudinal sides 41 overlap each other, and the longitudinal sides 41 are welded together to form a vertical seal 42 to form a cylindrical body. Next, the formation of the horizontal seal 43 that welds the cylindrical body in the short direction and the filling of the extraction material M into the bag body 3 are alternately repeated to manufacture a continuous extraction bag in which the extraction bags 1A are connected vertically at the side of the bag body 3 of the extraction bag 1A, and the continuous extraction bag is cut into individual extraction bags to obtain the extraction bag 1A. Alternatively, the horizontal seal 43 in the short direction of the cylindrical body is also fused at the same time, and the individually cut extraction bags 1A are continuously manufactured.

[0043] (Transformation mode) The extraction bag of the present invention may have various modifications. For example, the extraction bag 1B shown in the plan view and rear view in Fig. 6 is the extraction bag 1A shown in Fig. 1 in which the fold lines are not formed at the fixed end 12 of the first grip part 11 and the fixed end 22 of the second grip part 21, but a fold line Lf2 is formed at the support part of the thin plate member between them (the remaining part of the liftable grip parts 11, 21 in the thin plate member 10). Fig. 7 is a perspective view showing the state in which the first grip part 11 and the second grip part 21 of this extraction bag 1B are lifted and engaged.

[0044] As shown in FIG. 7, in this extraction bag 1B, when the first gripping portion 11 and the second gripping portion 21 are raised and engaged with each other, the thin plate-like member 10 is bent into an inverted V-shape rather than a trapezoidal shape.

[0045] In this extraction bag 1B, the gripping position of the first gripping part 11 can be moved away from the water surface during extraction, reducing or eliminating the effect of hot air from the water on the fingertips. Also, since the bag body 3 hangs down from the thin plate-like member 10 bent in an inverted V shape, it becomes easier to ensure the distance between the fingertips gripping the gripping part and the water surface.

[0046] The extraction bag 1C shown in the plan view and back view in FIG. 8 is different from the extraction bag 1A shown in FIG. 1 in that the thin plate-like member 10 is formed only on one side of the bag body 3. That is, when the extraction bag 1C is expanded so that the front and back of the bag body 3 are connected by the edge 4 of the bag body 3 of this extraction bag 1C, the thin plate-like member 10 is not present on both sides of the free end 13 of the first member 11 that protrudes from the edge 4 of the bag body 3, and no support part is provided in this part. FIG. 9 is a plan view of the manufacturing sheet 40C of this extraction bag 1C. This extraction bag 1C has the same extraction performance as the above-mentioned extraction bag 1A.

[0047] In addition, the present invention can take various other forms. For example, the fixed end of the first gripping part and the fixed end of the second gripping part may be provided on different sides of the bag body. The various modifications in the present invention can be combined as appropriate. [Explanation of symbols]

[0048] 1A, 1B, 1C Extraction Bags 3 Bag body 4. The edge of the bag body that is folded 10 Thin plate member 11 First grip part 12 Fixed end of first gripping part 13 Free end of first gripping portion 14 Free edge surrounding area 14a Folds in the peripheral area of ​​the free end 15 First gripping part notch 21 Second grip part 22 Fixed end of second gripping portion 23 Free end of second gripping portion 25 Notch of second gripping part 30 Water-permeable filter sheet 31 Long water-permeable filter sheet 40A, 40C Extraction bag manufacturing sheet 41 Side 42 Vertical seal 43 Horizontal seal 100 containers A Bath D1: Distance between the fixed end of the first gripping part and the fixed end of the second gripping part in the longitudinal direction of the bag body L0 Center line of the bag body width L1: The center line of the width of the long water permeable filter sheet Lf1, Lf2 broken line M extraction material R1, R2 The area dividing the bag body into two equal parts in the longitudinal direction θ1, θ2 Raising direction W0 Width of thin plate W1: overlap width between the first and second gripping parts

Claims

1. An extraction bag having a bag body formed from a water-permeable filter sheet, a thin plate-like member provided on an outer surface of the bag body, and an extraction material filled in the bag body, The thin plate-like member includes a first gripping portion and a second gripping portion, The first gripping portion and the second gripping portion each have one end as a fixed end and the other end as a free end, and are raised in opposite directions from the bag body and can be engaged by being raised; In a plan view, the first gripping portion has a free end protruding from an edge of the bag body, The edge of the extraction bag is formed as a fold of the water-permeable filterable sheet.

2. The extraction bag according to claim 1, wherein the thin plate-like member is fixed to the bag body in a peripheral region of the free end of the first gripping portion protruding from the edge of the bag body, the peripheral region having a fold, and the fold of the peripheral region overlaps with the edge of the bag body.

3. 3. The extraction bag according to claim 1, wherein the fixed end of the first gripping portion and the fixed end of the second gripping portion are spaced apart in the longitudinal direction of the bag body.

4. In the thin plate-like member, when an area on one surface of the bag body where the fixed end of the first gripping part and the fixed end of the second gripping part are provided is divided into two equal parts in the longitudinal direction of the bag body into a first area and a second area, the fixed end of the first gripping part is in the first area, and the first gripping part extends from the fixed end into the second area, 4. The extraction bag according to claim 3, wherein the fixed end of the second gripping portion is in the second region, and the second gripping portion extends from the fixed end into the first region.

Images