TWI841723B - Extraction Bag - Google Patents

Abstract

The extraction bag 1A of the present invention comprises: a bag body 3 formed of a water-permeable filter sheet, a thin plate-like member 10 disposed on the outer surface of the bag body 3, and an extraction material M filled in the bag body 3. The bag body 3 has two opposite surfaces 3x and 3y, and an upper edge 3a which is the edge of the two surfaces. The thin plate-like member 10 has a gripping portion 11 extending in the vertical direction of the bag body on one surface 3x of the two surfaces. The upper portion of the gripping portion 11 is fixed to the upper portion of the single surface 3x, and the lower portion of the gripping portion 11 can be pulled up from the single surface 3x. On the gripping portion 11, a fold line L1 in the vertical direction of the bag body is formed from the upper end to the lower end of the gripping portion 11 in the width direction center of the gripping portion 11, which allows the gripping portion 11 to be folded in half. Thus, a tea bag type extraction bag that obtains an extraction solution by immersing the bag body in hot water can easily obtain an extraction solution of sufficient concentration.

Description

Extraction Bag

The present invention relates to an extraction bag for obtaining an extraction liquid by immersing an extraction material filled in a water-permeable filter sheet bag body in hot water.

Previously, in order to easily load green tea, black tea, oolong tea and other beverages, tea bags filled with such tea leaves in a water-permeable bag body with a hanging string were widely used. For coffee, in addition to the drip-type extraction bag in which hot water is injected into the coffee powder, a tea bag type coffee extraction bag is used in which the bag body filled with coffee powder is immersed in hot water. However, even if the tea bag type coffee extraction bag is immersed in hot water, the coffee powder contains carbon dioxide, which makes the bag body filled with coffee powder easily float in the hot water, making it difficult to fully extract the coffee. Therefore, the following proposal has been made: a hook formed by a thin plate-like member is installed on one side of the bag body filled with coffee powder, so that the bag body filled with coffee powder does not float in the hot water, and the hook can be stuck on the edge of the cup (Patent Document 1).

In addition, there is a proposal to install a gripping part of a structure that is bent into a thin plate-like member and can be extended like a pantograph on a bag body filled with coffee powder, and to promote coffee extraction by moving the gripping part up and down in hot water soaked in the bag body (Patent Document 2). [Prior Technical Document] [Patent Document]

[Patent document 1] Utility Model Registration No. 3140084 [Patent document 2] Japanese Patent Publication No. 2006-273379

[The problem the invention is trying to solve]

However, in the previous coffee extraction bag in which the bag body filled with coffee powder is immersed in hot water, even if the bag body that wants to float is grasped by the hook or the gripping part formed by the thin plate-like member and forced to sink into the hot water, the thin plate-like member will bend or bend, and it is difficult to sink the bag body into the hot water. In order to promote the extraction of coffee, even if the hook or the gripping part is moved up and down, the bag body cannot move up and down in the hot water like the gripping part. In addition, even if the bag body temporarily sinks into the hot water, the entire coffee powder filled in the bag body is only swollen by the hot water on the surface, and the hot water is not easy to penetrate the interior of the entire coffee powder. Therefore, in the tea bag type extraction bag in which the bag body is immersed in hot water, it is difficult to obtain coffee liquid with the same concentration as the drip type in a time less than the same degree as the filter drip type.

In contrast, the subject of the present invention is to provide an extraction bag, which is a tea bag type extraction bag that obtains an extract by immersing the bag body filled with extraction materials such as coffee powder in hot water. The bag body can be easily sunk in hot water or moved up and down in hot water. Moreover, even if the hand leaves the extraction bag, the state of the bag body immersed in hot water can be stably maintained, and an extract of sufficient concentration can be easily obtained. [Technical means to solve the problem]

The inventors of the present invention have come up with the idea that in a tea bag type extraction bag in which a thin plate-shaped member is mounted on a bag body filled with extraction material, if the thin plate-shaped member extending in the vertical direction of the bag body is fixed to the upper part of the bag body and the lower part is arranged on one side of the bag body in such a manner that it can be pulled up from the bag body, when the gripping portion is pulled up, the gripping portion is folded in half from the upper end to the lower end along the folding line in the vertical direction of the bag body, and it is easy to make the length direction of the folded gripping portion stand upright in the vertical direction of the bag body. Another idea is to set the folded gripping portion in the shape of a hard rod extending from the upper part of the bag body, so that the bag body can be sunk into the hot water or moved up and down by gripping the gripping portion in the shape of a rod; further, by folding the gripping portion in half, a space is formed inside the bag body, so that hot water can easily enter the bag body, and the hot water can easily penetrate not only the surface of the extraction material in the bag body but also the inside, thereby promoting extraction; further, even if the hand leaves the gripping portion, the gripping portion is supported by the inner wall of the cup and can maintain a state of protruding from the hot water, thereby making it easy to grip the gripping portion after extraction and take the extraction bag out of the cup, thereby completing the present invention.

That is, the present invention provides an extraction bag, which has: a bag body formed by a water-permeable filter sheet, a thin plate-like member arranged on the outer surface of the bag body, and an extraction material filled in the bag body, The bag body has two opposite sides and an upper edge that becomes the edge of the two sides, The thin plate-like member has a gripping portion extending in the vertical direction of the bag body on one of the two sides, The upper part of the gripping portion is fixed to the upper part of the single side, and the lower part of the gripping portion can be pulled up from the single side, At the gripping portion, at the center of the width direction of the gripping portion, from the upper end to the lower end of the gripping portion, a fold line in the vertical direction of the bag body is formed to fold the gripping portion in half.

In addition, the present invention provides a hand-held extraction bag, in which the extraction material is not filled in the bag body in the above extraction bag, but an opening for filling the extraction material is provided in the bag body. [Effect of the invention]

According to the present invention, the lower part of the gripping part including the thin plate-like member disposed on one side of the bag body filled with the extraction material is pulled up from the bag body. If the gripping part is folded along the fold line formed in the vertical direction of the bag body, the gripping part can be easily folded in half from the upper end to the lower end, and the folded gripping part can be easily pulled up to the vertical direction of the bag body. The folded gripping part is in the shape of a hard rod fixed to the upper part of the bag body. Only the upper part of the bag body is folded in half, and a space is formed in the bag body. Therefore, by grasping the gripping part in the shape of a rod, the bag body can be sunk or moved up and down in the hot water in the cup. In addition, by forming a space in the bag body, when the bag body is sunk in the hot water in the cup or moved up and down in the hot water, the hot water can easily pass through the bag body, and the hot water not only penetrates the surface of the extraction material filled in the bag body, but also penetrates into the inside. This promotes extraction and speeds up the extraction process, and allows an extract with a concentration equal to or higher than that of the droplet extraction method to be obtained in a short time.

Furthermore, even if the hand leaves the gripping part in the cup, the gripping part is supported by the inner wall of the cup, and the gripping part can be maintained protruding from the hot water. Therefore, when the bag body is sinking in the hot water, extraction can be carried out even if the hand temporarily leaves the place, and the bag body can be moved up and down in the hot water by holding the gripping part again, and the bag body can be easily lifted out of the hot water after extraction.

Hereinafter, the present invention will be described in detail with reference to the drawings. In each of the drawings, the same reference numerals represent the same or equivalent components.

(Overall structure) Figure 1A is an extraction bag 1A of an embodiment of the present invention, and is a top view of the state where the gripping portion of the thin plate-like member is not pulled up, and Figure 1B is a back view thereof. In Figure 1A, the area filled with diagonal lines represents the adhesion area A 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. In addition, in the present invention, the adhesion area A is not limited to the state shown in the figure.

The extraction bag 1A comprises a bag body 3 formed of a water-permeable filter sheet, a thin plate-shaped member 10 disposed on the bag body 3, and an extraction material filled in the bag body 3. In the present invention, the bag body 3 comprises two opposite surfaces 3x and 3y, and an upper edge 3a which is an edge of the two surfaces 3x and 3y. In this embodiment, the bag body 3 is a flat bag. The thin plate-shaped member 10 is disposed on one of the two opposite surfaces 3x of the bag body (FIG. 1A), and is not disposed on the opposite surface 3y (FIG. 1B).

The thin plate-like component 10 has a short strip-shaped gripping portion 11 extending in the vertical direction of the bag body on one surface 3x of the bag body 3. The thin plate-like component 10 has a length from the vicinity of the upper edge 3a of the bag body 3 to the vicinity of the bottom edge 3b. The gripping portion 11 protrudes along a portion of the width of the upper edge 3a of the bag body 3, and the wide portion is also included. The band-shaped area along the upper edge 3a of the bag body becomes the contact area A between the gripping portion 11 and the bag body 3, and the gripping portion 11 is fixed to the surface 3x of the bag body through the contact area A. On the other hand, the lower part of the gripping portion 11, more specifically, the part closer to the bottom side of the bag body than the contact area A, is not in contact with the bag body 3. Therefore, as shown in Figure 2, the gripping portion 11 can be pulled up from the bag body 3.

The gripping portion 11 is provided so that its upper side 11a protrudes from the upper side 3a of the bag body 3 to the outside of the surface 3x of the bag body.

In addition, in the present invention, the upper edge 11a of the gripping portion may overlap with the upper edge 3a of the bag body, as in the extraction bag 1B shown in FIG6 , and the upper edge 11a of the gripping portion may be located closer to the bottom edge of the bag body than the upper edge 3a of the bag body. Furthermore, when the portion of the gripping portion 11 along the upper edge 3a of the bag body 3 is formed in a wide width, as in the extraction bag 1C shown in FIG7 , the upper edge 11a of the gripping portion may be formed in a wide width relative to the lower edge 11b of the gripping portion.

1A, when the upper edge 11a of the gripping portion protrudes from the upper edge 3a of the bag body, the lower edge 11b of the bag body bottom edge of the gripping portion 11 is preferably formed in a manner to be accommodated in the surface 3x of the bag body. This makes it easier to perform longitudinal sealing when the extraction bag 1A is hung on a filling and packaging machine for industrial production as described later.

The gripping portion 11 is provided with a fold line L1 in the vertical direction of the bag body that allows the gripping portion 11 to be folded in half. The fold line L1 is formed in the center of the gripping portion 11 in the width direction from the upper end to the lower end. On the other hand, the gripping portion 11 does not form a fold line in the width direction of the bag body that serves as a pull-up axis of the gripping portion 11. In addition, the fold line L1 can be formed by a pinhole, a half cut, a fold, etc.

Therefore, if the gripping portion 11 is pinched with one hand, and the gripping portion 11 is bent along the fold line L1 while being pulled up, the entire gripping portion 11 can be easily folded in half with one hand. By folding in half, the gripping portion 11 is made into a hard rod shape from its upper end to the lower end, as shown in FIG3 , and the rod-shaped gripping portion 11 can be made to stand vertically in the upper and lower directions of the bag body. At this time, the upper end portion of the bag body 3 is folded with the edge Aa of the bottom side of the bag body in the sticking area A in FIG1A as a top view, and the upper edge 11a of the gripping portion 11 protruding from the surface 3x of the bag body is pressed against the back side 3y of the bag body, thereby the upper edge 3a of the bag body 3 is also pressed against the back side 3y of the bag body, and the folded state of the upper end portion is stable. In addition, the folded portion of the bag body 3 is folded in half together with the gripping portion 11. Thereby, a space S is formed above the portion filled with the extraction material in the bag body 3. Therefore, as shown in FIG. 4 , the bag body 3 is placed in the cup 100, hot water is poured into the cup 100, and the bag body 3 is immersed in the hot water W by the gripping portion 11, so that the hot water W can flow into the bag body 3. In addition, by moving the gripping portion 11 up and down, the bag body 3 can be easily moved up and down in the hot water W, thereby making it easy for the hot water W to enter the space S in the bag body 3, and the hot water W can penetrate into the extraction material, thereby promoting the extraction of the extraction material.

Furthermore, as shown in FIG. 5 , the folded gripping portion 11 can be separated by hand, and the extraction bag 1A can be placed in the cup 100, with the gripping portion 11 leaning against the inner wall of the cup 100 and supported by the inner wall. By setting the length of the gripping portion 11 in the bag body vertical direction from the vicinity of the upper edge 3a of the bag body 3 to the vicinity of the bottom edge 3b, which is sufficiently long relative to the diameter of a general cup, the gripping portion 11 can be supported by the inner wall of the cup 100. In this case, although the gripping portion 11 protrudes from the liquid surface 11, the bag body 3 remains immersed in the hot water, so that the extraction of the extraction material can proceed. Furthermore, by gripping the gripping portion 11 again and moving it up and down, the bag body 3 can be moved up and down in the hot water W to promote extraction, and by lifting the gripping portion 11, the bag body 3 can be easily taken out of the hot water W. In addition, in the extraction bag of the present invention, since the extraction material is used in a state where it is sealed in the bag body 3, the extraction material will not be scattered outside the bag body when the extraction bag is used.

In contrast, if the gripping portion 11 is provided with a fold line L2 in the width direction of the bag body as shown in FIG. 25 , the fold line L2 becomes the pull-out axis of the gripping portion 11 as shown in FIG. 26 . In this case, even if the gripping portion 11 is pulled up while being folded in half at the fold line L1, it is difficult to fold the gripping portion 11 in half at the fold line L2. Furthermore, after the gripping portion 11 is completely folded at the fold line L2, the gripping portion 11 can be folded at the fold line L1, but the folding operation cannot be completed by one hand, making the folding operation of the gripping portion 11 complicated.

As described later, the gripping portion 11 is formed in a U-shape, and as shown in FIG27, when a fold line L2 in the width direction of the bag body is formed in the gripping portion 11, as shown in FIG28, the fold line L2 becomes a pulling axis. Therefore, if the gripping portion 11 is pulled up while the gripping portion 11 is folded in half along the fold line L1, the inner side ends 11c of the gripping portions 11 facing each other collide with each other. Therefore, in this case, it is not easy to fold in half.

(Extraction material) Extraction materials filled in the bag body 3 include coffee powder, tea leaves such as black tea and green tea, and Chinese medicine. Generally speaking, if coffee powder is filled in the bag body 3 and immersed in hot water, the bag body is easy to float due to the carbon dioxide contained in the coffee powder, so it is not easy to extract. However, according to the present invention, by grasping the gripping part of the thin plate-shaped member provided on one side of the bag body, it is easy to make the bag body sink in the hot water or move up and down in the hot water, so various extraction materials including coffee powder are suitable as extraction materials filled in the extraction bag of the present invention.

(Bag body) The shape of the bag body 3 is set as a flat bag in this embodiment. In the present invention, the shape of the bag body 3 is not limited to a flat bag, and can also be set as an accordion bag with side circumferences at the bottom or side. The shape of the bag body when viewed from above is not limited to a rectangle, and can also be a circle, etc.

The substantial planar dimensions of the bag body 3 can be appropriately set according to the size of the cup or container used when the extraction bag is used to obtain the extract. For example, the bag body 3 can be set to the size suitable for the coffee cup sold on the market.

(Water-permeable filter sheet) As the water-permeable filter sheet forming the bag body 3, various materials having water permeability and filterability that can be used for extracting the extraction material can be used, and the constituent material of the water-permeable filter sheet can be appropriately selected according to the type of the extraction material. For example, generally speaking, as water-permeable filter sheets for extracting beverages, there are known synthetic fibers such as polyester, nylon, polyethylene, polypropylene, and rayon, semi-synthetic fibers such as rayon, woven or non-woven fabrics containing single or composite fibers of natural fibers such as mulberry and mulberry, mixed paper containing Manila hemp, wood pulp, polypropylene fiber, etc., tea bag base paper, etc., and these can also be used in the present invention. In terms of the disposal of the extraction bag after use, it is preferred that the water-permeable filter sheet contain biodegradable fibers. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, and polyethylene succinate. In addition, in order to make the water-permeable filter sheet transparent so that the state of the extraction material in the bag body can be known, it is preferred to reduce the content of inorganic pigments or not contain inorganic pigments.

In addition, compared to the drip-type extraction bag, in which hot water is directly injected into the extraction material, the extraction bag of the present invention must supply hot water to the extraction material through the water-permeable filter sheet. Therefore, as long as the extraction material does not leak, it is preferred to use a water-permeable filter sheet with a coarser mesh than that used in the drip-type extraction bag. For example, when coffee powder is used as the extraction material, the air permeability of the water-permeable filter sheet can be set to 130 to 600 cm ³ /cm ² /sec (JIS L1096 air permeability A method (method using a Frazier air permeability tester)).

(Thin plate-like member) The thin plate-like member 10 is preferably waterproof and can be formed by pressing a thin plate-like material such as paperboard or plastic sheet with a resin layer on the surface. In terms of the disposal of the extraction bag 1A after use, it is preferably formed of a biodegradable material such as polylactic acid, polybutylene succinate, or polyethylene succinate.

(Usage) As the packaging and circulation form of the extraction bag 1A, as shown in FIG1A, it is preferred that the thin plate-shaped member 10 is in a flattened state on the bag body 3. Therefore, the extraction bag 1A in this state is set as the initial state, and as a method for extracting the extraction material from the extraction bag 1A, first, as shown in FIG2, the gripping portion 11 of the thin plate-shaped member 10 is pulled up from the bag body 3, and then as shown in FIG3, the gripping portion 11 is folded in half at the fold line L1, and the gripping portion 11 is pulled up in a manner that the gripping portion 11 is roughly in the vertical direction of the bag body, and as shown in FIG4, the bag body 3 is placed in a container such as a cup 100 and hot water is poured in, and the bag body 3 is pressed into the hot water with the gripping portion 11, so that the bag body 3 is immersed.

By folding the gripping portion 11, the upper side of the bag body 3 is also folded, forming a space inside the bag body 3, so that the hot water not only flows on the surface of the bag body 3, but also easily flows into the bag body 3. Therefore, if the bag body 3 in the hot water is moved up and down by moving the gripping portion 11 up and down, the hot water flows into the bag body 3 and is discharged from the bag body 3 repeatedly, thereby promoting extraction.

Alternatively, the extraction bag is placed in a cup 100 filled with hot water, and the extraction bag 1A is similarly moved up and down for extraction.

Furthermore, as shown in FIG. 5 , the extraction bag 1A can be placed while the bag body 3 is immersed in hot water by removing the gripping portion 11 from the hand and supporting the gripping portion 11 with the inner wall of the cup 100. Extraction can be performed during the placement. Furthermore, by gripping the gripping portion 11 again and moving the gripping portion 11 up and down, the bag body 3 can be moved up and down in the hot water, which can also promote extraction. The above extraction method can also be performed with cold water.

After extraction, the extraction bag 1A can be easily taken out from the cup 100 by grasping the gripping portion 11 .

Thus, according to the extraction bag 1A, an extract of a desired concentration can be obtained simply and quickly.

(Manufacturing method) As a manufacturing method of the extraction bag 1A, for example, as shown in FIG8, a sheet 20 for manufacturing an extraction bag is prepared, in which the fold line L1 of the thin plate-like member 10 is aligned with the short side direction of the long water-permeable filter sheet 21, and the thin plate-like member 10 is attached to the water-permeable filter sheet 21 in parallel at a specific interval. In the figure, the area sandwiched by the two-point chain line is used for the manufacture of one extraction bag portion.

By using the extraction bag manufacturing sheet 20 in a packaging and filling machine, extraction bags 1A can be continuously manufactured. In this case, first, as shown in FIG. 9, the extraction bag manufacturing sheet 20 is folded in half so that the two sides in the long direction overlap, and the sides in the long direction are welded to each other to form a longitudinal seal 22, thereby forming a cylindrical body 24. Then, by alternately and repeatedly welding the cylindrical body 24 in the short direction to form a transverse seal 23, and filling the bag body 3 with the extraction material M, the extraction bag 1A is manufactured. The extraction bag continuous body connected up and down on the side of the bag body 3 of the extraction bag 1A is cut into individual extraction bags to obtain the extraction bag 1A. Alternatively, when the transverse seal 23 in the short direction of the cylindrical body is formed, it is also melted and cut, and the respective cut extraction bags 1A are continuously manufactured.

(Variation) The extraction bag of the present invention may have various changes. For example, the difference between the extraction bag 1D in the top view shown in FIG10 and the extraction bag 1A in the top view shown in FIG1A is that the thin plate-like member 10 has a reinforcing portion 12 extending in the vertical direction of the bag body. More specifically, the reinforcing portion 12 is formed on the outer periphery of the gripping portion 11, and the upper end of the reinforcing portion 12 is connected to the gripping portion 11 via a fold line L3 in the width direction of the bag body, and the reinforcing portion 12 is substantially entirely attached to the bag body 3. In addition, the reinforcing part 12 may be separated from the gripping part 11 instead of being connected to the gripping part 11 via the fold line L3. However, when the gripping part 11 and the reinforcing part 12 are formed by stamping a thin plate-like material and attached to a single surface of the bag body 3, it is preferred that the reinforcing part 12 is continuous with the gripping part 11 via the fold line L3 in order to prevent the attachment positions from being shifted.

In the extraction bag 1D having the reinforcement part 12, the gripping part 11 can be pulled up to reduce the compression of the bag body 3 when the bag body 3 moves up and down in the cup 100 such as a cup, and the space can be always ensured on the extraction material filled in the bag body 3. In this way, the change of the amount of hot water flowing into the bag body 3 can be reduced, and the extraction speed can be stabilized. In addition, as shown in FIG11, when the hand leaves the gripping part 11 in the cup 100, the position or inclination of the gripping part 11 supported by the inner wall of the cup relative to the liquid surface can be stabilized. In particular, as shown in FIG12, when the extraction is performed with a tall cup 100, even if the hand leaves the gripping part 11, the gripping part 11 does not sink too much into the cup, and it is easy to grip the gripping part 11 again.

When the reinforcing part 12 is provided on the outer periphery of the gripping part 11, such as the extraction bag 1E shown in FIG. 13, the reinforcing part 12 is attached to the bag body 3, but the attachment of the gripping part 11 to the bag body 3 can be omitted. In this case, the upper part of the gripping part 11 is also fixed to the upper part of one surface 3x of the bag body 3, and the lower part of the gripping part can be pulled up from the surface 3x, so that the effect of the present invention can be obtained.

As shown in FIG. 14 , the gripping portion 11 may be formed in a U-shape. The upper end of the U-shaped gripping portion 11 is bent along the upper edge 3a of the bag body 3, and the portion along the upper edge 3a is in contact with the surface 3x of the bag body. In addition, the gripping portion 11 is formed so that the gripping portion 11 is divided into two equal parts below the U-shaped gripping portion 11 by a fold line L1 folded in the vertical direction of the bag body.

As shown in FIG15, when the gripping portion 11 of the extraction bag 1F is folded in half along the fold line L1 in the vertical direction of the bag body, the length of the fold line L1 is shorter than that of the extraction bag 1A shown in FIG1A, so the gripping portion 11 can be folded in half with a force slightly smaller than that of the extraction bag 1A shown in FIG1A.

Furthermore, after folding the gripping portion 11, the extraction material in the bag body 3 can be extracted in the same manner as the extraction bag 1A shown in FIG. 1A. As shown in FIG. 16, the hand can also be removed from the gripping portion 11 of the extraction bag 1F in the cup 100.

When the gripping portion 11 is formed into a U-shape, as shown in the extraction bag 1G in FIG17 , a notch 13 may be formed in the inner peripheral portion of the U-shaped gripping portion 11. Thus, as shown in FIG18 , the notch 13 of the folded gripping portion 11 may be hung on the opening wall of the cup 100.

19, a reinforcing portion 12 may be formed on the outer periphery of the U-shaped gripping portion 11. In this case, it is also preferred that the portion of the U-shaped gripping portion 11 along the upper edge 3a of the bag body and the upper end of the reinforcing portion 2 are continuous via the fold line L3.

As shown in FIG. 20 , the gripping portion 11 may be formed into an O-shape (i.e., a ring shape). Furthermore, when the gripping portion 11 is formed into an O-shape, as shown in FIG. 21 , a reinforcing portion 12 may be provided on the inner side of the gripping portion 11 to be in contact with the surface 3x of the bag body 3. In this case, it is preferred to provide an opening portion on the thin plate-shaped member in such a manner that a gap 25 is provided between the upper end of the reinforcing portion 12 and the inner upper end of the ring shape of the gripping portion 11. In this way, as shown in FIG. 22 , the gripping portion 11 can be lifted from the bag body and folded in half, and the shape of the bag body 3 can be prevented from being excessively squeezed. In contrast, if there is no gap 25 inside the O-shaped gripping portion 11, the entire interior of the gripping portion 11 is set as the reinforcing portion 12 and is attached to the surface 3x of the bag body, the gripping portion 11 lifted from the bag body 3 cannot be folded in half at the folding line L1.

(Hand-held extraction bag) In each of the above extraction bags 1A to 1J, the bag body 3 may not be filled with extraction material, and the bag body 3 may be set as an empty bag in advance, and an opening for filling the extraction material may be provided on the bag body 3 to serve as a hand-held extraction bag. According to the hand-held extraction bag, each extraction bag user may fill the empty bag with extraction material according to his or her own preference to obtain an extract.

It is preferable that a mechanism for closing the opening of the hand-held extraction bag is pre-set after the extraction material is filled. For example, as a hand-held empty bag corresponding to the extraction bag 1A, a hand-held extraction bag 30 shown in FIG. 23 is formed by folding back the water-permeable filter sheet on the surface 3y where the thin plate-shaped member 10 is not provided on the two opposite surfaces of the bag body 3. In this case, the folding portion 5 is provided on the bag body 3 so that the lower edge 3b of the bag body becomes a fold peak, and the opening 6 is formed at the position of the lower edge 3b. After the extraction bag user manually fills the extraction material M in the opening 6 of the bag body 3 that has been made into an empty bag, the front and back sides of the folding portion 5 are turned over, so that the opening 6 can be closed as shown in FIG. 24.

The method for closing the opening 6 of the empty bag is not limited to providing the folded portion 5 at the lower portion of the bag body 3. For example, a zipper described in Japanese Patent No. 4289363 may be provided at the opening 6, or double-sided tape for food packaging may be used.

Various aspects of the present invention have been described above, but the modifications of the various aspects of the present invention may also be appropriately combined.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1x, 1y: Extraction bag 3: Bag body 3a: Upper side of bag body 3b: Bottom side of bag body 3x: Surface of bag body 3y: Surface of bag body 5: Folding part 6: Opening part 10: Thin plate-shaped member 11: Grip part 11a: Upper side of grip part 11b: Lower side of grip part 11c: Inner end of grip part 12: Reinforcement part 1 3: Notch 20: Extraction bag manufacturing sheet 21: Water-permeable filter sheet 22: Longitudinal seal 23: Horizontal seal 24: Cylinder 25: Gap 30: Hand-held extraction bag 100: Cup A: Adhesion area Aa: The edge of the bottom side of the bag body in the adhesion area L1: The fold line of the bag body in the vertical direction L2: The fold line of the bag body in the width direction L3: The fold line of the bag body in the width direction M: Extraction material S: Space W: Hot water

FIG. 1A is a top view of the extraction bag 1A of the embodiment. FIG. 1B is a back view of the extraction bag 1A of the embodiment. FIG. 2 is a three-dimensional view of the state of pulling up the gripping portion of the extraction bag 1A of the embodiment. FIG. 3 is a three-dimensional view of the gripping portion of the extraction bag 1A of the embodiment being pulled up and folded in half. FIG. 4 is a three-dimensional view of the extraction state of the extraction bag 1A of the embodiment being pulled up and folded in half. FIG. 5 is a three-dimensional view of the extraction bag 1A of the embodiment being placed in a cup and in an extraction state. FIG. 6 is a top view of the extraction bag 1B of the embodiment. FIG. 7 is a top view of the extraction bag 1C of the embodiment. FIG. 8 is a top view of a sheet for making an extraction bag. FIG. 9 is an explanatory diagram of a method for making an extraction bag. FIG. 10 is a top view of the extraction bag 1D of the embodiment. FIG. 11 is a three-dimensional view of the extraction bag 1D of the embodiment placed in a cup in an extraction state. FIG. 12 is a three-dimensional view of the extraction bag 1D of the embodiment placed in a tall cup in an extraction state. FIG. 13 is a top view of the extraction bag 1E of the embodiment. FIG. 14 is a top view of the extraction bag 1F of the embodiment. FIG. 15 is a three-dimensional view of the gripping portion of the extraction bag 1F of the embodiment pulled up and folded in half. FIG. 16 is a three-dimensional view of the state of extraction by pulling up the gripping portion and using the folded extraction bag 1F of the embodiment for extraction. FIG. 17 is a top view of the extraction bag 1G of the embodiment. FIG. 18 is a three-dimensional view of the extraction bag 1G of the embodiment placed in a cup in an extraction state. FIG. 19 is a top view of the extraction bag 1H of the embodiment. FIG. 20 is a top view of the extraction bag 1I of the embodiment. FIG. 21 is a top view of the extraction bag 1J of the embodiment. FIG. 22 is a three-dimensional view of the extraction bag 1J of the embodiment placed in a cup in an extraction state. FIG. 23 is a three-dimensional view of the hand-held extraction bag 30 of the embodiment. FIG. 24 is a three-dimensional view of the state of closing the opening of the hand-held extraction bag 30 of the embodiment. FIG. 25 is a top view of the extraction bag 1x of the comparative example. FIG. 26 is a three-dimensional view of the state of pulling up the gripping portion of the extraction bag 1x of the comparative example. FIG. 27 is a top view of the extraction bag 1y of the comparative example. FIG. 28 is a three-dimensional view of the state of pulling up the gripping portion of the extraction bag 1y of the comparative example.

1A: Extraction bag

3: Bag body

3a: Top of the bag body

3b: Bottom edge of the bag body

3x: Bag body surface

3y: Bag body surface

10: Thin plate components

11: Gripping part

11a: Upper side of the grip

11b: Below the grip

A: Adhesion area

Aa: The edge of the bottom side of the bag body in the sticking area

L1: The fold line of the bag body in the up and down direction

Claims (13)

An extraction bag, comprising: a bag body formed of a water-permeable filter sheet, a thin plate-shaped member disposed on the outer surface of the bag body, and an extraction material filled in the bag body, wherein the bag body has two opposite sides and an upper edge forming the edge of the two sides, and the thin plate-shaped member has a short strip-shaped gripping portion extending in the vertical direction of the bag body on one of the two sides, the upper portion of the gripping portion is fixed to the upper portion of the single side, and the lower portion of the gripping portion can be pulled up from the single side, and a fold line in the vertical direction of the bag body is formed at the gripping portion at the center of the gripping portion in the width direction, from the upper end to the lower end of the gripping portion, which can fold the gripping portion in half. An extraction bag, comprising: a bag body formed of a water-permeable filter sheet, a thin plate-shaped member disposed on the outer surface of the bag body, and an extraction material filled in the bag body, wherein the bag body has two opposite sides and an upper edge forming the edge of the two sides, and the thin plate-shaped member has a U-shaped gripping portion extending in the vertical direction of the bag body on one of the two sides, the upper portion of the gripping portion is fixed to the upper portion of the single side, and the lower portion of the gripping portion can be pulled up from the single side, and a fold line in the vertical direction of the bag body is formed at the gripping portion at the center of the gripping portion in the width direction, from the upper end to the lower end of the gripping portion, which can fold the gripping portion in half. An extraction bag, comprising: a bag body formed of a water-permeable filter sheet, a thin plate-shaped member disposed on the outer surface of the bag body, and an extraction material filled in the bag body, wherein the bag body has two opposite sides and an upper edge forming the edge of the two sides, and the thin plate-shaped member has an O-shaped gripping portion extending in the vertical direction of the bag body on one of the two sides, the upper portion of the gripping portion is fixed to the upper portion of the single side, and the lower portion of the gripping portion can be pulled up from the single side, and a fold line in the vertical direction of the bag body is formed at the gripping portion at the center of the gripping portion in the width direction, from the upper end to the lower end of the gripping portion, so that the gripping portion can be folded in half. An extraction bag, comprising: a bag body formed of a water-permeable filter sheet, a thin plate-shaped member disposed on the outer surface of the bag body, and an extraction material filled in the bag body, wherein the bag body has two opposite sides and an upper edge that is the edge of the two sides, and the thin plate-shaped member has a gripping portion extending in the vertical direction of the bag body and a reinforcing portion extending in the vertical direction of the bag body on one of the two sides, the upper portion of the gripping portion is fixed to the upper portion of the single side, and the lower portion of the gripping portion can be pulled up from the single side, and a fold line in the vertical direction of the bag body is formed at the gripping portion at the center of the gripping portion in the width direction, from the upper end to the lower end of the gripping portion, which can fold the gripping portion in half. An extraction bag, comprising: a bag body formed of a water-permeable filter sheet, a thin plate-shaped member disposed on the outer surface of the bag body, and an extraction material filled in the bag body, the bag body having two opposite sides and an upper edge forming the edge of the two sides, the thin plate-shaped member having a gripping portion extending in the vertical direction of the bag body on one of the two sides, the upper portion of the gripping portion being fixed to the upper portion of the single side, the lower portion of the gripping portion being able to be pulled up from the single side, and a fold line in the vertical direction of the bag body being formed at the gripping portion in the central portion in the width direction of the gripping portion, from the upper end to the lower end of the gripping portion, which can fold the gripping portion in half and the upper portion of the bag body in half. An extraction bag as claimed in any one of claims 1 to 5, wherein no fold line in the width direction of the bag body serving as a pulling axis is formed at the gripping portion. An extraction bag as claimed in any one of claims 1 to 5, wherein the gripping portion extends from near the upper edge of the single surface to near the bottom edge. An extraction bag as claimed in any one of claims 1 to 5, wherein the portion along the upper edge of the gripping portion is attached to the single surface. An extraction bag as claimed in any one of claims 1 to 5, wherein the gripping portion has a wide portion along the upper edge of the above-mentioned single surface. An extraction bag as claimed in any one of claims 1 to 5, wherein the upper edge of the gripping portion protrudes from the upper edge of the bag body to the outside of the single surface. As in the extraction bag of claim 1 or 2, the reinforcement portion is formed on the outer periphery of the gripping portion, and the upper end of the reinforcement portion is connected to the gripping portion via a fold line in the width direction of the bag body. For example, in the extraction bag of claim 3, a reinforcement portion is formed on the inner side of the O-shaped gripping portion. A hand-held extraction bag, in which the extraction material is not filled into the bag body in any of the extraction bags in claim 1 to 12, but an opening for filling the extraction material is provided in the bag body.