TWI834840B - extraction bag - Google Patents

Abstract

The extraction bag 1A of the present invention has: a bag body 3 formed of a water-permeable filter sheet 2; a thin plate-shaped member 10 provided on the outer surface of the bag body 3; and an extraction material filled in the bag body 3. The bag body 3 has a first surface 3A and a second surface 3B facing each other, and an upper edge 4a forming the edge of these surfaces. The thin plate member 10 has a first member 10A on the first surface 3A of the bag body and a second member 10B on the second surface 3B of the bag body. These 10A and 10B are separated by the first transverse fold line Lh1 along the upper edge 4a. And continuous. The thin plate member 10 has a pair of elongated areas 12 that span the first member 10A and the second member 10B, sandwich the central contact portion 11 of the first member 10A from the left and right, and stand up from the bag body to face each other. ; and the longitudinal fold line Lv1, which enables the long area 12 to stand up. The extraction bag 1 is a tea bag-type extraction bag filled with extraction materials such as coffee powder. It is easy to sink the bag body into hot water or move the bag body up and down.

Description

extraction bag

The present invention relates to an extraction bag in which an extraction material filled in a bag body made of a water-permeable filter sheet is immersed in hot water to obtain an extraction liquid.

Previously, in order to easily brew green tea, black tea, oolong tea and other beverages, tea bags filled with these tea leaves in a water-permeable bag body with a sling were widely used. The same goes for coffee. In addition to drip-type coffee extraction bags in which hot water is poured into coffee powder, there are also tea bag-type coffee extraction bags in which the bag body filled with coffee powder is immersed in hot water. However, even if you try to immerse a tea bag type coffee extraction bag in hot water, since the coffee powder contains carbon dioxide, the bag body filled with coffee powder tends to float in the hot water, making it difficult to fully extract coffee. Therefore, it is proposed that a hook-shaped piece formed in advance from a thin plate member be attached to one side of the bag body filled with coffee powder, and the hook-shaped piece can be hooked in such a way that the bag body filled with coffee powder does not float in hot water. One that hangs on the rim of the cup (Patent Document 1).

Furthermore, it is proposed that a handle having a structure in which a thin plate-shaped member is bent and stretched like a pantograph is attached to a bag body filled with coffee powder, and the handle is moved up and down in hot water immersed in the bag body. This promotes coffee extraction (Patent Document 2).

[Prior technical literature]

[Patent Document]

[Patent Document 1] Utility Model Registration No. 3140084

[Patent Document 2] Japanese Patent Application Publication No. 2006-273379

However, in the previous coffee extraction bag in which the bag body filled with coffee powder is immersed in hot water, the bag body is forced to sink even if the hook-shaped piece or the handle portion formed of a thin plate member is held. into hot water, but it is difficult to sink the bag body into hot water due to the bending or deflection of the thin plate-shaped member. In order to promote the extraction of coffee, even if the hook piece or the handle part is moved up and down, the bag body does not move up and down like the holding part in the hot water. Furthermore, even if the bag body is temporarily immersed in hot water, only the surface layer of the entire coffee powder filled in the bag body will swell in the hot water, and the hot water will not easily penetrate into the interior of the entire coffee powder. Therefore, in a tea bag type extraction bag in which the bag body is immersed in hot water, it is difficult to obtain a coffee liquid with the same concentration as the drip type in a time or less than that of the drip type.

In contrast, the present invention is a tea bag-type extraction bag that obtains an extraction liquid by immersing the bag body filled with extraction materials such as coffee powder in hot water, and its subject is to easily immerse the bag body in hot water. Or move it up and down, and spread the hot water throughout the extraction material inside the bag body, and easily obtain the extraction liquid with sufficient concentration.

The inventors of the present invention completed the present invention by assuming that a thin plate-like member is attached to a tea bag-type extraction bag filled with an extraction material and the thin plate-like member is given a specific shape. The thin plate-like member is formed into a strong rod shape extending from the center of the bag body. By holding the rod-shaped part, the bag body can be easily sunk into hot water or moved up and down, and the bag body can also be expanded. The area or head space of the upper surface of the part occupied by the extraction material. When the bag body is moved up and down in hot water, the hot water flows downward relative to the upper surface of the extraction material in the bag body, and the hot water easily penetrates into the bag body. Inside the extracted material.

That is, the extraction bag of the present invention has: a bag body formed of 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; and the bag body When the bag body is unfolded so that the first surface is located below the upper edge and the second surface is located above the upper edge of the two surfaces, the thin plate is The shape member has a first member on the first surface of the bag body and a second member on the second surface of the bag body, and the first member and the second member are continuous through the first transverse fold line along the aforementioned upper edge, and the thin plate The shaped member has: a central adhesion portion, which is in contact with the first surface of the bag body at the central portion of the first member; a pair of elongated areas, which span the first member and the second member and can stand up from the bag body. Starting from the left and right sandwiching the central adhesion part; and the longitudinal folding line, which can stand up the pair of long strip areas from the sides close to the sides of the bag body. Make the pair of strips face each other.

Furthermore, the present invention provides an extraction bag for manual filling. In the above extraction bag, the bag body is not filled with extraction material, and the bag body is provided with an opening for filling the extraction material.

According to the present invention, a pair of elongated areas of a thin plate-like member provided on the outer surface of a bag body filled with extraction material is bent in such a manner that they become opposed, thereby suppressing mutual deflection of the pair of elongated areas. It forms a solid rod shape extending in one plane of the bag body. Therefore, by holding the rod-shaped portion, the bag body can be easily sunk into hot water or moved up and down. Therefore, hot water can easily pass through the bag body.

In addition, since the pair of elongated areas are provided throughout the two opposing surfaces of the bag body, by making them into a rod shape, the elongated area provided on only one surface of the bag body is made into a rod shape. In contrast, the rod-shaped part becomes a long strip. Therefore, when holding the rod-shaped part and causing the bag body to sink or move up and down in hot water, it is possible to prevent the hand holding the rod-shaped part from getting heated by the hot air.

Furthermore, according to the present invention, by inclining and holding the rod-shaped portion, the shape of the portion occupied by the extraction material in the bag body is changed in such a way that the area of the upper surface is expanded, thereby expanding the head space. Therefore, the hot water flowing into the bag body easily flows downward from the upper surface of the extraction material, promoting extraction within the bag body not only from the surface of the part occupied by the extraction material, but also from the entire body. In particular, in the state where the second surface of the bag body is pulled up by the central pull-up portion of the thin plate-shaped member, the pull-up of the central pull-up portion can also prevent the bag body from being affected by the own weight of the extraction material. It is pulled downward to flatten, thereby expanding the head space. Furthermore, by providing a reinforcing portion extending in the width direction of the bag body below the rod-shaped portion, the bag body can be prevented from shrinking in the width direction, thereby enlarging the entire space inside the bag body.

Therefore, according to the present invention, the extraction speed can be accelerated, and an extract with a concentration equal to or higher than that of the trickling filter extraction method can be easily obtained in a short time.

1A: Extraction bag

1B: Extraction bag

1C: Extraction bag

1D: Extraction bag

1E: Extraction bag

1F: Extraction bag

1G: Extraction bag

1x:extraction bag

3: Bag body

3A:Side 1

3B: Side 2

4a:top

4b: side

4c: bottom edge

5:Folding part

6:Opening part

10: Thin plate components

10A: 1st component

10B: 2nd component

11: Central sticking part

11a: The center is close to the side of the part

12:Long area

13: Reinforcement Department

13a: Reinforcement Department

13b: Reinforcement Department

14:Central upper end

15: Central pull-up section

15A: Adhesion area

16:Hooking part

17: Gap

18: The upper part is attached to the part

20: Sheet for extraction bag manufacturing

21: Water filter sheet

22: Vertical sealing

23:Horizontal sealing

30: Extraction bag for manual filling

100: cup

Lh1: 1st horizontal fold line, horizontal fold line

Lh2: The second horizontal fold line

Lv1: Vertical fold line, 1st vertical fold line

Lv1’: Vertical fold line

Lv2: Vertical fold line, 2nd vertical fold line

Lv3: The third vertical fold line

Lv4: Vertical fold line, 4th vertical fold line

M:Extraction material

Figure 1A is a front view (first component side plan view) of the extraction bag 1A of the embodiment.

FIG. 1B is a rear view (second member side plan view) of the extraction bag 1A of the embodiment.

Figure 2 is an expanded view of the extraction bag 1A of the embodiment.

Figure 3 is a perspective view of the extraction bag 1A in a state where the second member of the thin plate-shaped member is pulled up from the second surface of the bag body.

FIG. 4A is a side view of the extraction bag 1A of the embodiment with the elongated area erected.

FIG. 4B is a perspective view of the extraction bag 1A of the embodiment with the elongated area viewed from the first side of the main body.

FIG. 4C is a perspective view of the extraction bag 1A of the embodiment in a state where the elongated area is erected, viewed from the second side of the main body.

Figure 5 is a plan view of the sheet used for manufacturing extraction bags.

Figure 6 is an explanatory diagram of the manufacturing method of the extraction bag.

Figure 7 is an expanded view of the extraction bag 1B of the embodiment.

FIG. 8 is a side view of the extraction bag 1B with the elongated region of the embodiment erected.

Figure 9 is an expanded view of the extraction bag 1C of the embodiment.

FIG. 10 is a perspective view of the extraction bag 1C according to the embodiment with the elongated region erected.

Figure 11 is an expanded view of the extraction bag 1D of the embodiment.

FIG. 12 is a perspective view of the extraction bag 1D of the embodiment with the elongated region erected.

Fig. 13 is a perspective view of the extraction bag 1D in a state where the long area is erected and the hooking portion 16 is hooked on the cup.

Figure 14 is an expanded view of the extraction bag 1E of the embodiment.

FIG. 15 is a perspective view of the extraction bag 1E of the embodiment with the elongated region erected.

Figure 16 is an expanded view of the extraction bag 1F of the embodiment.

FIG. 17 is a perspective view of the extraction bag 1F according to the embodiment with the elongated region erected.

Figure 18 is an expanded view of the extraction bag 1x of the comparative example.

Fig. 19 is a perspective view of the extraction bag 1x of the comparative example with the elongated region erected.

Figure 20 is an expanded view of the extraction bag 1G of the embodiment.

Figure 21 is a perspective view of the extraction bag 30 for manual filling according to the embodiment.

Fig. 22 is a perspective view of a state in which the opening of the extraction bag 30 for manual filling according to the embodiment is closed.

Hereinafter, the present invention will be specifically described with reference to the drawings. In addition, in each figure, the same symbol represents the same or equivalent component.

(overall composition)

1A and 1B are respectively a front view (front view of the first member side) and a rear view (front view of the second member side) of the extraction bag 1A according to one embodiment of the present invention in a state where the elongated area of the thin plate member is not raised. rear view). In addition, FIG. 4A is a side view of the extraction bag 1A with the elongated area of the thin plate-shaped member standing up, FIG. 4B is a perspective view of the extraction bag 1A viewed from the first surface side of the bag body, and FIG. 4C is a view from the bag body. The second perspective view of the extraction bag 1A.

This extraction bag 1A has: a bag body 3 composed of a flat bag formed of a water-permeable filter sheet; a thin plate-shaped member 10 provided on the outer surface of the bag body 3; and an extraction material filled in Inside the bag body 3. The bag body 3 has a first surface 3A and a second surface 3B facing each other, and an upper edge 4a forming an edge of the two surfaces. In this embodiment, the upper edge 4a is a fold line outside the first surface 3A and the second surface 3B.

Figure 2 is an expanded view of the extraction bag 1A. The first side A of the bag body and the first member 10A of the thin plate-shaped member 10 provided on the first side 3A are shown on the lower side of the paper surface of the upper side 4a. The upper side of the paper shows the second surface 3B of the bag body and the second member 10B of the thin plate-shaped member 10 provided on the second surface 3B. In the figure, the hatched area indicates the contact area between the thin plate member 10 and the bag body 3, and the black dotted area indicates the exposed portion of the bag body 3 in the expanded view. Furthermore, in the present invention, the adhesion area is not limited to that shown in the figures.

The first member 10A and the second member 10B are continuous across the first transverse fold line Lh1, which coincides with the upper edge 4a of the bag body and is along the upper edge 4a.

A central contact portion 11 is formed in the center of the first member 10A and is in contact with the first surface 3A of the bag body. It is preferable that the adhesion area of the central adhesion part 11 includes at least the vicinity of the first transverse fold line Lh1. In this embodiment, substantially the entire surface of the central adhesion part 11 is in contact with the bag body 3.

The thin plate-like member 10 is formed with a pair of elongated areas 12 sandwiching the central contact portion 11 from the left and right (areas surrounded by a two-point chain line in FIG. 2 ). The elongated area 12 is formed across the first member 10A and the second member 10B and can stand up from the bag body 3 .

In addition, a vertical fold line is formed on the thin plate-like member 10, which can stand up a pair of long areas 12 from the sides close to the side 4b of the bag body, and make them opposite each other as shown in Figures 4A, 4B, and 4C. Towards. The longitudinal fold lines extend in the length direction of the long strip areas 12 and form an upright rotation axis when the pair of long strip areas 12 are erected. Furthermore, in the present invention, a pair of elongated areas 12 can be erected and their opposite longitudinal folding lines are formed. Strictly speaking, they are not formed in the length direction of the elongated area or the up and down direction of the bag body, but can be as described later. The fourth longitudinal fold line Lv4 is generally formed obliquely with respect to the longitudinal direction of the elongated region 12 . On the other hand, in the present invention, it is preferable that the longitudinal fold lines form at least one pair in the first member 10A, and more preferably also form at least one pair in the second member 10B. It is particularly preferable that the longitudinal fold lines of the second member 10B are at It is formed on the extension line of the longitudinal fold line of the first member 10A. In this embodiment, since the left and right side edges 11a of the central abutting portion 11 of the first member 10A are separated from the elongated area 12, the first member 10A is closer to the bottom of the bag body than the central abutting portion 11. The ends of the long area 12 on the side 4c form a pair of first longitudinal fold lines Lv1. Furthermore, a pair of second longitudinal fold lines Lv2 extending from the first transverse fold line Lh1 is formed in the second member 10B, and a third longitudinal fold line Lv3 is formed in a portion where the ends of the pair of elongated regions 12 are continuous with each other.

Furthermore, the transverse folding line Lh1 and the longitudinal folding lines Lv1, Lv2, and Lv3 of the thin plate-like member 10 can be formed by hole-shaped wiring, half-cutting, crimping, etc.

The characteristic structure of the present invention is that a pair of long areas 12 extending across the first member 10A and the second member 10B are erected from the bag body 3 using longitudinal fold lines and facing each other. A pair of long strip areas 12 erected on the main body 3 function as long and strong rod-shaped handles when the extraction material in the bag body 3 is immersed in hot water.

In this embodiment, the first member 10A has a reinforcing portion 13 in contact with the bag body 3 at the lower end of the longer strip area 12 and closer to the bottom edge 4c of the bag body (Fig. 2). Thereby, the longitudinal fold line LV1 forming the erected axis of the lower end of the elongated area 12 is sandwiched between the central adhesion part 11 and the reinforcing part 13, and the strength of the lower end is improved. In addition, the reinforcing portion 13 extends in the width direction of the bag body. Therefore, shrinkage of the bag body in the width direction due to the weight of the extraction material is prevented, and a wide space can be ensured within the bag body 3 . Furthermore, in the present invention, the reinforcing part 13 is provided as necessary.

On the other hand, in this embodiment, the second member 10B has a central upper end portion 14 extending from the first transverse fold line Lh1 between the pair of elongated areas 12 . The central upper end 14 is connected to the elongated area 12 via the second longitudinal fold line Lv2 and floats without contacting the bag body 3 . Moreover, the 2nd member 10B has the center pull-up part 15, and it is connected with the center upper end part 14 via the 2nd transverse fold line Lh2. The central pull-up portion 15 is cut away from the elongated area 12 . In addition, the center pull-up portion 15 has a contact area 15A with the bag body at a portion away from the center upper end portion 14 . Therefore, in a state where the pair of elongated areas 12 stand upright from the bag body 3 and face each other, as shown in FIGS. 4A and 4C , the center portion of the second surface 3B of the bag body is directed toward the upper edge 4a of the bag body. When the bag body is pulled up, the surface area of the part occupied by the extraction material becomes larger, and the top space also becomes larger. Therefore, the hot water flowing into the bag body can be used to efficiently extract the extraction material, and the time required to obtain an extraction liquid with a specific concentration can be shortened.

(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, Chinese herbal medicine, and the like. Generally speaking, when coffee powder is filled into the bag body 3 and is immersed in hot water, the bag body floats due to the carbon dioxide contained in the coffee powder, so it is difficult to extract. However, according to the present invention, by erecting the elongated area 12 into a strong rod shape, and using the rod-shaped portion like a handle extending from the central portion of the bag body 3, the bag body 3 can be easily sunk into the cup. The hot water inside, or moving up and down in the hot water. Therefore, since the hot water not only penetrates the surface layer of the entire coffee powder in the bag body, but also penetrates the inside, the extraction liquid can be efficiently obtained from the entire coffee powder. For extraction materials other than coffee powder, hot water is also soaked into the extraction material, and the extraction liquid can be efficiently obtained from the entire extraction material.

Furthermore, since the extraction bag of the present invention is used with the extraction material sealed in the bag body 3, the extraction material will not be dispersed outside the bag body when the extraction bag is used.

(Bag body)

In this embodiment, the shape of the bag body 3 is a flat bag with three sides sealed with the upper edge being a fold line outside the water-permeable filter sheet. In the present invention, the shape of the bag body 3 is not limited to a flat bag. For example, it can also be a crotch bag with an inner barrier at the bottom or side. In addition, the upper edge 4a of the bag body 3 is not limited to being an outer fold line, and may also be a sealing edge. However, in terms of the manufacturing method of the extraction bag, it is better to set it as an outer fold line.

The net plane size of the bag body 3 can be determined according to the cup used when using the extraction bag to obtain the extraction liquid. Or set appropriately according to the size of the container. For example, the bag body 3 can be set to a size suitable for a commercially available coffee cup.

(water filter sheet)

As the water-permeable filter sheet forming the bag body, various materials with water-permeability and filterability can be used so that they can be used for extraction of extraction materials. The constituent materials of the water-permeable filter sheet can also be appropriately selected according to the type of extraction material. For example, generally speaking, as a water-permeable filter sheet used for extracting beverages, synthetic fibers such as polyester, nylon, polyethylene, polypropylene, and vinylon, semi-synthetic fibers such as rayon, nylon, and polyester are known. Woven or non-woven fabrics of natural fibers such as single or composite fibers; paper including mixed paper such as abaca, wood pulp, polypropylene fiber, etc., tea bag base paper, etc., can be used in the present invention. From the viewpoint of the disposability of the extraction bag after use, it is preferable that the water-permeable filter sheet contains biodegradable fibers. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, polyethylene succinate, and the like. Furthermore, from the point of making the water-permeable filterable sheet transparent so that the state of the extraction material in the bag body can be known, it is preferable to reduce the content of inorganic pigments or to exclude inorganic pigments.

In addition, compared with directly injecting hot water into the extraction material in the trickling filter extraction bag, in the extraction bag of the present invention, since the hot water must be supplied to the extraction material through the water-permeable filter sheet, as long as no extraction material is produced, To prevent powder leakage, it is better to use a mesh with a coarser mesh than the water-permeable filter sheet used in drip filter extraction bags. For example, when coffee powder is used as the extraction material, the air permeability of the water-permeable filter sheet can be set to 130~600cm ³ /cm ² /sac (JIS LH1096 Air permeability method A (using Fraser type air permeability test) machine method)).

(thin plate member)

Thin plate-like members are preferably water-repellent and can be formed by stamping thin plate-like materials such as cardboard and plastic sheets with resin laminated on the surface. From the viewpoint of the disposability of the extraction bag 1A after use, it is preferably made of biodegradable materials such as polylactic acid, polybutylene succinate, and polyethylene succinate.

(Instructions)

As for the packaging and distribution form of the extraction bag 1A, it is preferable that the entire thin plate member 10 is located on the surface of the bag body 3 and the bag body is in a flattened state, as shown in FIGS. 1A and 1B . Therefore, as a method of use from this state, first, as shown in FIG. 3 , the second member 10B of the thin plate-shaped member is erected from the second surface 3B of the bag body so that the first member 10A and the second member 10B are positioned approximately same plane. At this time, the contact area 15A (Fig. 2) of the central pull-up portion 15 of the second surface 3B of the bag body is pulled up toward the upper edge 4a. The shape of the bag body 3 is changed from a flat state and the first surface 3A is buckled. The area of the upper surface of the part occupied by the extraction material in the body becomes larger, and the head space also becomes larger.

Next, as shown in FIG. 4B , the thin plate-shaped member is bent using the first longitudinal fold line Lv1, the second longitudinal fold line Lv2, and the third longitudinal fold line Lv3 so that the pair of elongated regions 12 face each other. Thereby, the pair of elongated areas 12 form a long and strong rod shape. If so, hold the rod-shaped part, put the extraction bag into a container such as a cup, and pour hot water. Or put the extraction bag into a container filled with hot water. Then, the rod-shaped part including the long area 12 can be used to sink the bag body into the hot water, or move it up and down in the hot water to increase the extraction speed of the extraction material. At this time, among the rod-shaped portions extending across the length of the first surface 3A and the second surface 3B of the bag body, the rod-shaped portion formed by the elongated area 12 of the first surface 3A is fixed to the first surface 3A, and from the second surface The erected rod-shaped part 3B is located above the upper edge 4a of the bag body 3, and can be held by hand. The upper edge 4a of the bag body 3 is closer to the upper rod-shaped part, so even if boiling hot water enters the container, the hand holding the rod-shaped part can be prevented from getting hot due to the heat. Of course, you can also use cold water for extraction if needed. In addition, the rod-shaped part can be erected on the inner wall of a container such as a cup in advance, and the bag body can be placed in the container.

After extraction, the bag body can be removed from the container by holding the rod-shaped part.

In this way, according to this extraction bag 1A, the extraction liquid of the desired concentration can be obtained simply and quickly.

(manufacturing method)

As a method of manufacturing the extraction bag 1A, for example, as shown in FIG. 5 , an extraction bag manufacturing sheet 20 is prepared. The extraction bag manufacturing sheet 20 is formed by connecting the first transverse fold line Lh1 of the thin plate-shaped member 10 and the long strip. The thin plate-shaped members 10 are arranged at specific intervals and attached to the water-permeable filtration sheet 21 in a direction corresponding to the longitudinal direction of the water-permeable filtration sheet 21 . In the figure, the area sandwiched by the two-point chain line is used to make one portion of the extraction bag.

The extraction bag 1A can be continuously manufactured by using the extraction bag manufacturing sheet 20 in a packaging and filling machine. In this case, first, as shown in FIG. 6 , the extraction bag manufacturing sheet 20 is folded in half so that both sides in the longitudinal direction overlap, and the longitudinal sides are welded to each other to form a longitudinal seal 22 . This forms a cylindrical body. Next, the extraction bag 1A is manufactured by alternately repeating the process of forming the horizontal seal 23 that welds the cylindrical body in the short side direction and filling the extraction material M into the bag body 3. The extraction bag 1A is placed up and down on the side of the bag body 3. The extraction bag continuum is connected, and the extraction bag continuum is cut into individual extraction bags to obtain the extraction bag 1A. Or, in the short period of forming the cylindrical body The horizontal seals 23 in the side direction are also melted simultaneously, and the extraction bags 1A cut into individual pieces are continuously produced.

(changing form)

The extraction bag of the present invention can have various modification points. For example, the extraction bag 1B with the developed view shown in FIG. 7 omits the central pull-up part 15 of the extraction bag 1A with the developed view shown in FIG. 2, and exposes the bag body of this part. According to this extraction bag 1B, even if the rod-shaped portion including the pair of elongated areas 12 is tilted as shown in FIG. 8 , the central contact portion 11 of the bag body 3 can be held by the rod-shaped portion. Therefore, by inclining the rod-shaped part during extraction of the extraction material, the shape of the part occupied by the extraction material in the bag body 3 can be changed with its upper surface compared to the case where the rod-shaped part is erected in the vertical direction. Large changes in the way can also make the head space larger. Therefore, the extraction bag 1B can also easily extract from the entire extraction material in the bag body.

The extraction bag 1C with the developed view shown in FIG. 9 is the extraction bag 1A with the developed view shown in FIG. 2 , in which a long area 12 is provided on the left and right of the central adhesion part 11 across the cutting line in the first member. Continuous across the longitudinal fold line Lv1'. This longitudinal folding line Lv1' extends the second longitudinal folding line Lv2 between the central upper end 14 and the elongated regions 12 provided on the left and right of the second member 10B toward the first member 10A. Thereby, the rotation axis when the elongated area 12 is erected is the part held on the surface of the bag body, and is longer than the extraction bag 1A in the expanded view shown in Figure 2, thereby erecting a pair of elongated areas 12. The mounting strength of the formed rod-shaped member to the bag body 3 is improved.

Furthermore, in this extraction bag 1C, the first member 10A has a reinforcing portion 13a in contact with the bag body 3 at the outer peripheral portion of the elongated area 12, and the reinforcing portion 13a crosses over the upper edge 4a of the bag body and is on the second member. The upper part of the second member 10B is extended, and a reinforcing part 13b in contact with the bag body is also formed on the upper part of the second member 10B. Therefore, in the state of erecting the elongated area 12, as shown in FIG. 10, the upper part of the second surface 3B of the bag body is pressed by the reinforcing part 13b, and the second side of the bag body is lifted by the central pull-up part 15. When the part of surface 3B is pulled up, the head space in the bag body can be easily enlarged, which can further increase the extraction speed.

The extraction bag 1D having a developed view shown in Figure 11 is an L-shaped protrusion provided on the side of a pair of elongated areas 12 in the first member 10A relative to the extraction bag 1C having a developed view shown in Figure 9 The hooking part is 16. In the extraction bag 1D, if the elongated area 12 is erected, the hook portion 16 can be made to protrude relative to the surface of the central adhesion portion 11 as shown in FIG. 12 , so that the extraction bag can be used as shown in FIG. 13 When the material is extracted, the hooking portion 16 is hooked on the opening wall of the cup 100 . Therefore, you can take your hands away from the extraction bag 1D while keeping the bag body 3 immersed in hot water during extraction, or you can drain the extraction bag 1D before discarding the extraction bag 1D after extraction. The bag 1D is hooked to the empty cup.

The extraction bag 1E having the developed view shown in Figure 14 is designed so that the ends of a pair of long areas in the second member 10B are not continuous through the third longitudinal fold line Lv3 in relation to the extraction bag 1D having the developed view shown in Figure 11 But an independent. In addition, notches 17 are respectively provided at the ends of one pair of elongated areas 12 in the second member 10B. Therefore, as shown in FIG. 15 , the ends of the long area 12 standing up from the bag body can be engaged with each other at the notch 17 . Likewise in this extraction bag 1E, the elongated region 12 functions as a strong rod-shaped portion.

The extraction bag 1F with the unfolded view shown in Figure 16 omits the central pull-up for the above-mentioned extraction bag. 15, reinforcing parts 13, 13a, 13b, etc., but there is a central adhesion part 11 in the central part of the first member 10A, and a pair of long areas 12 sandwiching the central adhesion part 11 spans the first member 10A and the first member 10A. 2 members 10B. In addition, a pair of fourth longitudinal fold lines Lv4 are formed between the central contact portion 11 and the elongated region 12 , and are formed obliquely with respect to the longitudinal direction of the elongated region 12 .

The same is true in this extraction bag 1F. If the thin plate-shaped member is bent using the longitudinal folding lines Lv3 and Lv4 to stand up the pair of long areas 12 from the bag body 3 and make them face each other, as shown in Figure 17 , the long area 12 can be used to form a strong rod-shaped portion extending from the first surface 3A of the bag body, and the bag body 3 can be sunk into hot water or moved up and down in hot water by holding the rod-shaped portion. This speeds up extraction.

In addition, since the upper contact portion 18 that is in contact with the bag body is formed in the portion sandwiched between the pair of elongated areas 12 in the second member 10B, if the elongated areas 12 are stood up and faced with each other, as shown in Fig. As shown in 17, the main part of the bag body swells, and the top space becomes larger. Due to this swelling, the extraction bag 1F can also speed up the extraction speed of the extraction material.

On the other hand, the extraction bag 1x of the comparative example having the developed view shown in FIG. 18 has a pair of elongated areas 12 formed only in the second member 10B compared to the extraction bag 1F having the developed view shown in FIG. 16 . Therefore, if the pair of elongated areas 12 are raised from the bag body and faced with each other, the first member 10A and the second member 10B are bent at the first transverse fold line Lh1 as shown in FIG. 19 . Furthermore, the bag body 3 hangs down in a flat state from the first transverse fold line Lh1. Therefore, it is difficult to sink the bag body 3 into hot water using the elongated area 12 standing up from the bag body 3, or to move the bag body in hot water, and the effects of the present invention cannot be obtained.

In the present invention, the lengths in the longitudinal direction of the first member and the second member may be the same or different. For example, the extraction bag 1G with the expanded view shown in Figure 20 is made by extending the length of the second member toward the bottom edge 4c side of the second surface 3B of the bag body in the aforementioned extraction bag 1A with the expanded view shown in Figure 2 And by lengthening the length of the strip area 12, the part that can be held is lengthened.

(Extraction bag for manual filling)

In each of the above-mentioned extraction bags 1A, 1B, 1C, 1D, 1E, 1F, and 1G, the bag body 3 may not be filled with the extraction material, but the bag body 3 may be set as an empty bag in advance, and the bag body 3 may be provided with the extraction material. The opening for filling is used as an extraction bag for manual filling. According to the manual filling of extraction bags, each extraction bag user can fill the empty bag with extraction materials according to their own preferences and obtain the extraction liquid.

It is preferable to provide a mechanism for closing the opening of the extraction bag for manual filling after filling the extraction material. For example, as an empty bag for manual filling corresponding to the aforementioned extraction bag 1A, like the extraction bag 30 for manual filling shown in FIG. 21 , it can be placed under the first surface 3A of the bag body 3 to form the first surface. The folded portion 5 of the water-permeable filter sheet 3 is folded toward the surface side, and the opening 6 is formed in advance without sealing the lower end of the bag body 3 . After the user of the extraction bag manually fills the opening 6 of the bag body 3 with the extraction material M, the opening 6 can be closed as shown in Figure 22 by turning the front and back of the folded portion 5 over.

The mechanism for closing the opening 6 of the empty bag is not limited to providing the folding portion 5 at the lower part of the bag body 3. For example, the chuck described in Patent No. 4289363 can be provided at the opening 6, or the opening 6 can be closed. Use double-sided tape for food packaging.

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

1A: Extraction bag

3A:Side 1

3B: Side 2

11: Central sticking part

12:Long area

13: Reinforcement Department

15: Central pull-up part

Claims (10)

An extraction bag, which has: a bag body formed of a water-permeable filterable sheet; a thin plate-like member disposed on the outer surface of the bag body; and an extraction material filled in the bag body; and The bag body has a first side and a second side facing each other, and an upper edge forming the edge of the two sides, When the bag body is unfolded so that the first surface is located below the upper edge and the second surface is located above, The thin plate-shaped member has a first member on the first surface of the bag body and a second member on the second surface of the bag body, and the first member and the second member are continuous through the first transverse fold line along the aforementioned upper edge, and The thin plate-like member has: a central contact portion that is in contact with the first surface of the bag body at the central portion of the first member; A pair of long strip areas, which span the first member and the second member, can stand up from the bag body and sandwich the central adhesion portion from the left and right; and The longitudinal fold line can stand up the pair of long strip areas from the sides close to the side of the bag body respectively so that the pair of long strip areas face each other. The extraction bag of Claim 1, wherein the front ends of the pair of elongated areas in the second member are continuous across the longitudinal fold line. For example, the extraction bag of claim 1 or 2, wherein the second component has: The central upper end, which is between a pair of long strip areas, extends from the first transverse fold line and is connected to the pair of long strip areas across the fold line, and is not attached to the bag body; and The central pull-up part is connected to the central upper end through a fold line and is cut away from the long area; and The part of the central pull-up part away from the central upper end is in contact with the bag body. The extraction bag according to any one of claims 1 to 3, wherein in the first member, the left and right sides of the central adhering portion are cut away from the long area, and the aforementioned longitudinal fold line is formed closer to the central adhering portion. The bottom side of the bag body. The extraction bag according to any one of claims 1 to 3, wherein in the first member, the central adhesion portion and the elongated areas provided on the left and right thereof are continuous across the aforementioned longitudinal fold line. The extraction bag according to any one of claims 1 to 5, wherein the first member has a reinforcing portion in the longer strip area closer to the bottom side of the bag body and is in contact with the bag body. The extraction bag according to any one of claims 1 to 5, wherein the first member has a reinforcing portion in contact with the bag body at the outer periphery of the elongated area. The extraction bag of claim 7, wherein the reinforcing portion extends over the upper edge and is provided on the second member. The extraction bag according to any one of claims 1 to 8, wherein the first member has an L-shaped protruding hook portion on the side of a pair of long strip areas. An extraction bag for manual filling. In the extraction bag according to any one of claims 1 to 9, the bag body is not filled with extraction material, and the bag body is provided with an opening for filling the extraction material.