Extraction bag

Abstract

An extraction bag (1A) comprises a bag body (3) and a thin plate-shaped member (10) arranged on one surface of the bag body (3), wherein the center of the thin plate-shaped member (10) is set as an origin, a straight line passing through the origin and in the short side direction of the thin plate-shaped member (10) is set as an x-axis, a straight line passing through the origin and perpendicular to the x-axis is set as a y-axis, an area satisfying x>0 and y>0 is set as an A1 area, an area satisfying x<0 and y>0 is set as an A2 area, an area satisfying x<0 and y<0 is set as an A3 area, and an area satisfying x<0 and y<0 is set as an A4 area. When the area where y>0 and y<0 is set as the A4 area, the thin plate-shaped member (10) has a first support portion (11) attached to the A2 area, a first gripping portion (13) that can be pulled up from the bag body (3) and extended from the first support portion (11) to the A3 area, a second support portion (12) attached to the A4 area, and a second gripping portion (14) that can be pulled up from the bag body (3) and extended from the second support portion (12) to the A1 area; the first gripping portion (13) and the second gripping portion (14) can be engaged with each other. The extraction bag is a tea bag type extraction bag that can immerse the bag body in hot water, and can easily obtain an extraction liquid in a short time.

Description

Technical Field

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

[0002] In the past, tea bags filled with these teas in a water-permeable bag body with a hanging rope were widely used in order to easily brew beverages such as green tea, black tea, and oolong tea. Regarding coffee, in addition to drip-type extraction bags that pour hot water into coffee powder, tea bag-type coffee extraction bags that immerse the bag body filled with coffee powder in hot water are also used. However, even if the tea bag-type coffee extraction bag is immersed in hot water, the bag body filled with coffee powder is easy to float in the hot water because the coffee powder contains carbon dioxide, making it difficult to fully extract the coffee. In view of this, the following structure is proposed: a hook piece formed by a thin plate-like member is pre-installed on one side of the bag body filled with coffee powder, and the hook piece can be hung on the edge of a cup so that the bag body filled with coffee powder does not float in the hot water (Patent Document 1).

[0003] In addition, the following structure has been proposed: a gripping portion formed by bending a thin plate-like member to extend and retract like a pantograph is attached to a bag body filled with coffee powder, and the extraction of coffee is promoted by moving the gripping portion up and down in hot water immersed in the bag body (Patent Document 2).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Utility Model Registration No. 3140084

[0007] Patent document 2: Japanese Patent Application Publication No. 2006-273379. Summary of the invention

[0008] Problems to be solved by the invention

[0009] However, in the conventional coffee extraction bag in which the bag body filled with coffee powder is immersed in hot water, even if the hook piece or the holding part formed by the thin plate-like member is held to forcefully sink the floating bag body in the hot water, the thin plate-like member will bend or bend, and it is difficult to sink the bag body in the hot water. Even if the hook piece or the holding part is moved up and down to promote the extraction of coffee, the bag body does not move up and down in the hot water in the same way as the holding part. In addition, 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 is swollen by the hot water, and it is difficult for the hot water to penetrate into 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 a coffee liquid with the same concentration as the drip filter type in a time less than the same degree as the drip filter type.

[0010] In view of this, the subject of the present invention is a tea bag type extraction bag which obtains an extract by immersing a bag body filled with an extraction material such as coffee powder in hot water, wherein the bag body can be easily sunk in the hot water or moved up and down in the hot water, and even if the hand is released from the extraction bag, the bag body can be stably kept immersed in the hot water, so that an extract of sufficient concentration can be easily obtained.

[0011] Means used to solve problems

[0012] The inventor has conceived that in a tea bag type extraction bag in which a bag body filled with an extraction material is attached to a thin plate-shaped member, if the thin plate-shaped member is attached to one surface of the bag body, a pair of gripping parts that can be pulled up from the bag body are formed on the thin plate-shaped member, and the pair of gripping parts are pre-formed to be engageable so that the pair of gripping parts can remain in a pulled-up state, then when the bag body is immersed in hot water with the surface opposite to the surface to which the thin plate-shaped member is attached facing downward, the gripping parts can be made to stand up from the hot water surface, and by holding the gripping parts, the bag body can be easily sunk in the hot water or moved up and down; at this time, the bag body expands horizontally and the internal space becomes larger, and the extraction material also expands in the bag body. In the bag body, not only the surface of the part occupied by the extraction material, but also the hot water easily penetrates into the inside, thereby promoting extraction; further, even if the hand is released from the gripping parts, the extraction bag maintains the orientation of the aforementioned opposite surface facing downward, and extraction progresses; thus, the present invention has been completed.

[0013] That is, the present invention provides an extraction bag, which is an extraction bag having a bag body formed of a water-permeable filter sheet, a thin plate-shaped member provided on one surface of the bag body, and an extraction material filled in the bag body, wherein when the center of the thin plate-shaped member is set as an origin (0, 0), a straight line passing through the origin and in the short side direction of the thin plate-shaped member is set as an x-axis, a straight line passing through the origin and perpendicular to the x-axis is set as a y-axis, an area satisfying x>0 and y>0 is set as an A1 area, an area satisfying x<0 and y>0 is set as an A2 area, an area satisfying x<0 and y<0 is set as an A3 area, and an area satisfying x>0 and y<0 is set as an A4 area, The thin plate-like component comprises: a first supporting portion attached to the A2 area, a first holding portion which can be pulled up from the bag body and extended from the first supporting portion to the A3 area, a second supporting portion attached to the A4 area, a second holding portion which can be pulled up from the bag body and extended from the second supporting portion to the A1 area; or a first supporting portion attached to the A1 area, a first holding portion which can be pulled up from the bag body and extended from the first supporting portion to the A4 area, a second supporting portion attached to the A3 area, a second holding portion which can be pulled up from the bag body and extended from the second supporting portion to the A2 area; the first holding portion and the second holding portion which are pulled up from the bag body can engage with each other.

[0014] The present invention also provides a hand-filled extraction bag, wherein in the above-mentioned extraction bag, the bag body is not filled with an extraction material, and an opening for filling the extraction material is provided in the bag body.

[0015] Effects of the Invention

[0016] According to the present invention, since the first and second holding parts of the thin plate-shaped member provided on one surface of the bag body filled with the extraction material can be pulled up, if the first and second holding parts are held and the bag body is sunk into hot water from the surface opposite to the surface provided with the thin plate-shaped member, the bag body expands in the horizontal direction, the internal space of the bag body becomes larger, and the extraction material in the bag body can be extracted while being horizontally expanded. Therefore, in the bag body, not only the surface of the part occupied by the extraction material but also the whole part can be penetrated by the hot water to perform the extraction. In addition, it is also easy to hold the first and second holding parts and sunk the bag body into the hot water or move it up and down in the hot water, which can promote the extraction.

[0017] Furthermore, since the first gripping part and the second gripping part can be engaged with each other by pulling them up, the first gripping part and the second gripping part stably maintain the pulled-up state even if the hand is removed from the extraction bag. Therefore, after the extraction bag is immersed in hot water, even if the hand is removed from the extraction bag, the extraction bag maintains the immersed state in the direction when it was initially immersed, and the extraction is advanced, and it becomes easy to hold the gripping part again.

[0018] Thus, according to the present invention, the extraction speed can be increased, and an extract having a concentration equal to or higher than that of a trickling extraction method can be obtained in a short time and simply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A It is a top view of the extraction bag 1A of the Example.

[0020] Figure 1B It is a perspective view of a state where the first gripping portion and the second gripping portion of the extraction bag 1A of the embodiment are pulled up and engaged.

[0021] Figure 1C This is a perspective view of a state in which the extraction bag 1A of the embodiment is immersed in a container such as a cup and the hand is released from the extraction bag.

[0022] Figure 1D This is a perspective view of a state in which the extraction bag 1A of the embodiment is moved up and down in a container such as a cup.

[0023] Figure 2 This is a top view of a sheet for producing an extraction bag.

[0024] Figure 3 This is a diagram for explaining a method for manufacturing an extraction bag.

[0025] Figure 4 It is a top view of the extraction bag 1B of the embodiment.

[0026] Figure 5 It is a top view of the extraction bag 1C of the embodiment.

[0027] Figure 6 It is a top view of the extraction bag 1D of the Example.

[0028] Figure 7 It is a top view of the extraction bag 1E of the embodiment.

[0029] Fig. 8A It is a top view of the extraction bag 1F of an example.

[0030] Figure 8B This is a perspective view of a state in which the first gripping portion and the second gripping portion of the extraction bag 1F of the embodiment are pulled up and engaged.

[0031] Fig.9A It is a top view of the extraction bag 1G of an Example.

[0032] Fig. 9B It is a perspective view of a state where the first gripping portion and the second gripping portion of the extraction bag 1G of the embodiment are pulled up and engaged.

[0033] Fig. 10A It is a top view of the extraction bag 1H of the embodiment.

[0034] Fig. 10B It is a perspective view of a state where the first gripping portion and the second gripping portion of the extraction bag 1H of the embodiment are pulled up and engaged.

[0035] Fig.11A It is a top view of the extraction bag 1I of the embodiment.

[0036] Fig. 11B It is a perspective view of a state where the first gripping portion and the second gripping portion of the extraction bag 1I of the embodiment are pulled up and engaged.

[0037] Fig. 12A It is a top view of the extraction bag 1J of the embodiment.

[0038] Fig. 12B It is a perspective view of a state where the first gripping portion and the second gripping portion of the extraction bag 1J of the embodiment are pulled up and engaged.

[0039] Fig.13 It is a perspective view of the extraction bag 30 for hand filling of an embodiment.

[0040] Fig.14 It is a perspective view of a state where the opening of the extraction bag 30 for hand filling according to the embodiment is closed. DETAILED DESCRIPTION

[0041] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, in each figure, the same reference numerals represent the same or equivalent components.

[0042] (Overall structure)

[0043] Figure 1A This is a top view of an extraction bag 1A according to an embodiment of the present invention, in a state where the gripping portion of the thin plate-shaped member is not pulled up. Figure 1B 1 is a perspective view of a state where the first supporting part and the second supporting part are pulled up from the bag body. In this figure, the area filled with oblique 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. In the present invention, the adhesion area is not limited to the form shown in the figure.

[0044] The extraction bag 1A comprises a bag body 3 which is a flat bag formed of a water-permeable filter sheet, a thin plate-like member 10 provided on one surface of the bag body 3, and an extraction material filled in the bag body 3. No thin plate-like member is provided on the opposite surface of the bag body 3, and the water-permeable filter sheet is exposed on the entire surface.

[0045] When the center (ie, center of gravity) of the thin plate-shaped member 10 is defined as the origin (0, 0), the pair of support portions 11 and 12 and the pair of gripping portions 13 and 14 are formed in the thin plate-shaped member 10 in a point-symmetrical manner around the origin. More specifically, when a straight line passing through the origin and in the short-side direction of the thin plate-like component 10 is set as the x-axis, a straight line passing through the origin and perpendicular to the x-axis is set as the y-axis, an area satisfying x>0 and y>0 is set as the A1 area, an area satisfying x<0 and y>0 is set as the A2 area, an area satisfying x<0 and y<0 is set as the A3 area, and an area satisfying x>0 and y<0 is set as the A4 area, the thin plate-like component 10 is provided with a first supporting portion 11 adhered to the A2 area, a first holding portion 13 that can be pulled up from the bag body 3 and extends from the first supporting portion 11 to the A3 area, a second supporting portion 12 adhered to the A4 area, and a second holding portion 14 that can be pulled up from the bag body 3 and extends from the second supporting portion 12 to the A1 area.

[0046] The first support portion 11 is adjacent to the second holding portion 14, and their boundary obliquely crosses the y-axis. The first support portion 11 close to the first holding portion 13 protrudes toward the A1 area, and the end of the second holding portion 14 on the opposite side to the second support portion 12 protrudes toward the A2 area, forming a protruding end 14a.

[0047] Similarly, the second support portion 12 is adjacent to the first holding portion 13, and their boundary obliquely crosses the y-axis. The second support portion 12 close to the second holding portion protrudes toward the A3 area, and the end of the first holding portion 13 on the opposite side of the first support portion 11 protrudes toward the A4 area, forming a protruding end 13a.

[0048] Therefore, the protruding end 13a of the first gripping portion 13 and the protruding end 14a of the second gripping portion 14 overlap in the x direction. In other words, the projection images of the end of the first gripping portion 13 and the end of the second gripping portion 14 toward the x axis overlap each other. Figure 1B By pulling up the first gripping portion 13 and the second gripping portion 14 as shown, the protruding ends 13 a and 14 a can be engaged with each other, and the first gripping portion 13 and the second gripping portion 14 can be held in a state of being pulled up and standing from the bag body 3 .

[0049] In order to reliably perform such engagement, it is preferred that the length W1 of the overlap in the x direction between the end of the first gripping portion 13 opposite to the first supporting portion 11 and the end of the second gripping portion 14 opposite to the second supporting portion 12 be set to be greater than 5% of the width W0 of the thin plate-like member in the x direction.

[0050] In addition, a fold line L1 is provided between the first support portion 11 and the first grip portion 13, and the fold line L1 serves as a rotation axis for pulling up the first grip portion 13. Similarly, a fold line L2 is provided between the second support portion 12 and the second grip portion 14, and the fold line L1 serves as a rotation axis for pulling up the second grip portion 14. The fold lines L1 and L2 are formed by perforation lines, half-cutting lines, streak pressing, and the like.

[0051] In this embodiment, the first support portion 11 is an area defined by a cutting line and a fold line L1 at the boundary between the first support portion 11 and the second gripping portion 14, and is substantially entirely attached to the bag body 3. Similarly, the second support portion 12 is an area defined by a cutting line and a fold line L2 at the boundary between the second support portion 12 and the first gripping portion 13, and is substantially entirely attached to the bag body 3. Thus, by setting the attachment area of ​​the first support portion 11 and the second support portion 12 substantially entirely and providing the fold lines L1 and L2, the first gripping portion 13 and the second gripping portion 14 can be easily raised substantially vertically from the bag body 3.

[0052] In addition, the fold line L1 is formed in the same A2 area as the first supporting portion 11, and the fold line L2 is formed in the same A4 area as the second supporting portion 12. The fold line L1 and the fold line L2 are separated by a distance D in the y-axis direction ( Figure 1A ). With this separation, even if the bag body 3 is filled with the extraction material and has a thickness, the bag body 3 can be easily bent at the positions of the fold lines L1 and L2. Therefore, the extraction bag 1A is pinched by holding the first gripping portion 13 and the second gripping portion 14, as shown in FIG. Figure 1B As shown in FIG. 1 , the bag body 3 is bent into a substantially inverted V-shape in side view. Therefore, compared with the state where the bag body 3 is expanded in its original state as a flat bag, it is easier to insert it into a cup.

[0053] In addition, in the present embodiment, the first supporting portion 11 and the second supporting portion 12 are continuous at the central portion 15 of the thin plate-like member 10. Therefore, the first supporting portion 11, the second supporting portion 12, the first holding portion 13, and the second holding portion 14 can be formed by a single thin plate-like member. Furthermore, when manufacturing the extraction bag manufacturing sheet, which is a structure in which a thin plate-like member punched in advance into a predetermined shape is attached to a long water-permeable filter sheet in order to industrially manufacture the extraction bag 1A on a production line, positional deviation of the thin plate-like member is less likely to occur.

[0054] (Extraction material)

[0055] As the extraction material filled into the bag body 3, coffee powder, tea leaves such as black tea and green tea, Chinese medicine, etc. can be cited. Generally, if coffee powder is filled into 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 difficult to extract. However, according to the present invention, by holding the holding portion of the thin plate-shaped member set on one surface of the bag body, it is easy to sink the bag body in hot water from the opposite side of the bag body, or to move it up and down in hot water. Furthermore, when the bag body is sunk in hot water, it can be formed so that the opposite side faces downward, and then it can be formed. The coffee powder expands to a larger area in the bag body, and the top space is also expanded. Therefore, hot water easily penetrates into the entire coffee powder in the bag body, and the extract can be obtained efficiently from the entire coffee powder. With regard to extraction materials other than coffee powder, hot water can also be penetrated into the extraction material, and the extract can be obtained efficiently from the entire extraction material.

[0056] Furthermore, 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 does not scatter outside the bag body when the extraction bag is used.

[0057] (Bag body)

[0058] The shape of the bag body 3 is 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 for example, it can be a gusseted bag with triangular pieces at the bottom or side. The shape of the bag body in a top view is not limited to a rectangle, and can also be a circle.

[0059] The net 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 made into a size suitable for commercially available coffee cups.

[0060] (Water-permeable filter sheet)

[0061] As the water-permeable filter sheet forming the bag body, various materials with water permeability and filterability can be used so as to be used for the extraction of the extracting material, and the structural material of the water-permeable filter sheet can be appropriately selected according to the type of the extracting material. For example, as a water-permeable filter sheet generally used for extracting beverages, it is known that there are woven fabrics or non-woven fabrics composed of single or composite fibers of synthetic fibers such as polyester, nylon, polyethylene, polypropylene, vinylon, semi-synthetic fibers such as rayon, natural fibers such as paper mulberry and knotwood, mixed paper composed of Manila hemp, wood pulp, polypropylene fiber, etc., tea bag base paper and other papers, and these can also be used in the present invention. From the point of view of the discardability of the extraction bag after use, it is preferred that the water-permeable filter sheet contains biodegradable fibers. As biodegradable fibers, polylactic acid, polybutylene succinate, polyethylene succinate, etc. can be cited. Furthermore, from the viewpoint of providing the water-permeable filter sheet with transparency so as to understand the state of the extraction material in the bag body, it is preferable to reduce the content of the inorganic pigment or to exclude the inorganic pigment.

[0062] In addition, in the drip filter type extraction bag, hot water is directly injected into the extraction material. In the extraction bag of the present invention, hot water is always supplied to the extraction material through the water-permeable filter sheet. Therefore, as long as the powder of the extraction material does not leak, it is preferable to use a water-permeable filter sheet with a coarser mesh than the water-permeable filter sheet used in the drip filter 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 type air permeability tester)).

[0063] (Thin plate parts)

[0064] The thin plate-like member is preferably hydrophobic and can be formed by punching a thin plate-like material such as cardboard or plastic sheet with resin laminated on the surface. From the perspective of the discardability of the extraction bag 1A after use, it is preferably formed of a biodegradable material such as polylactic acid, polybutylene succinate, or polyethylene succinate.

[0065] (How to use)

[0066] As the packaging and distribution form of the extraction bag 1A, it is preferable to Figure 1A As shown in FIG. 1 , the thin plate-like member 10 is in a flattened state on the bag body 3. In view of this, as a method of use from this state, first, as shown in FIG. Figure 1BAs shown, the first gripping portion 13 and the second gripping portion 14 of the thin plate-shaped member 10 are pulled up from the bag body 3, and the portions that are in front and the portions that are in the back are replaced at the portions where the ends of the thin plate-shaped member 10 overlap each other, so that they are engaged. Next, the first gripping portion 13 and the second gripping portion 14 are pinched up, and the bag body 3 is placed in a container 100 such as a cup from the side opposite to the side where the thin plate-shaped member 10 is provided, and hot water is poured in, so that the bag body 3 is immersed in the hot water A.

[0067] In hot water, Figure 1C As shown in FIG. 1 , the bag body 3 is expanded horizontally, and the extraction material in the bag body 3 is also expanded to a larger area. Therefore, the hot water A becomes easy to penetrate into the entire extraction material. Furthermore, if the extraction bag 1A is moved up and down by the hand holding the first gripping part 13 and the second gripping part 14, as shown in FIG. Figure 1D As shown, while the bag body 3 is maintained in a substantially horizontally expanded state, the head space is expanded, and hot water is repeatedly flowed into and discharged from the surface of the bag body 3 into the bag body 3, so extraction is promoted.

[0068] Alternatively, the extraction bag is placed in the container 100 filled with hot water, and the extraction bag 1A is similarly moved up and down to perform extraction.

[0069] In addition, the hand may be released from the first gripping part 13 and the second gripping part 14 and the extraction bag 1A may be placed in a container 100 such as a cup. In this case, the extraction bag can also stably maintain the state in which the first gripping part 13 and the second gripping part 14 are erected from one side of the bag body and the opposite side thereof is facing downward. Therefore, the extraction can be promoted during the placement. In addition, by maintaining the first gripping part 13 and the second gripping part 14 in the erected state, these gripping parts may be held again to move the bag body 3 up and down in the hot water to promote the extraction.

[0070] The above extraction method can also be carried out in cold water.

[0071] After extraction, the extraction bag can be easily taken out from the container by gripping the first gripping portion 13 and the second gripping portion 14 .

[0072] As described above, according to the extraction bag 1A, an extract having a desired concentration can be obtained simply and quickly.

[0073] (Manufacturing method)

[0074] As a method for manufacturing the extraction bag 1A, for example, Figure 2As shown, a sheet 20 for making an extraction bag is prepared in which the thin plate-like member 10 is arranged at a predetermined interval and attached to the water-permeable filter sheet 21 in such a manner that the y direction of the thin plate-like member 10 coincides with the long-side direction of the long water-permeable filter sheet 21. In the figure, the area enclosed by the double-dashed line is used for making one extraction bag.

[0075] By using the extraction bag manufacturing sheet 20 in a packaging filling machine, the extraction bag 1A can be continuously manufactured. Figure 3 As shown in the figure, the extraction bag manufacturing sheet 20 is folded in half so that the two sides in the long-side direction overlap, and the sides in the long-side direction are welded to each other to form a longitudinal seal 22, thereby forming a cylindrical body. Next, by alternately repeating the formation of the transverse seal 23 that welds the cylindrical body in the short-side direction and the filling of the extraction material M into the bag body 3, an extraction bag continuous body in which the extraction bags 1A are connected vertically at the side of the bag body 3 of the extraction bag 1A is manufactured, and it is cut into individual extraction bags to obtain extraction bags 1A. Alternatively, when the transverse seal 23 in the short-side direction of the cylindrical body is formed, it is also melted, and the extraction bags 1A that are cut separately are continuously manufactured.

[0076] (Deformed form)

[0077] The extraction bag of the present invention can have various changes. For example, Figure 4 The extraction bag 1B shown in the top view is relative to Figure 1A The extraction bag 1A shown in the top view has a structure in which the shape of the thin plate-like member 10 is formed in a mirror image relationship. Therefore, the thin plate-like member 10 provided on one surface of the bag body 3 formed of a flat bag is formed with a first support portion 11 attached to the A1 area, a first gripping portion 13 that can be pulled up from the bag body 3 and extends from the first support portion 11 to the A4 area, a second support portion 12 attached to the A3 area, and a second gripping portion 14 that can be pulled up from the bag body 3 and extends from the second support portion 12 to the A2 area. In addition, the thin plate-like member 10 is not provided on the opposite surface of the bag body 3, and the water-permeable filter sheet forming the bag body 3 is exposed on the entire surface of the opposite surface.

[0078] According to the extraction bag 1B, similarly to the above-mentioned extraction bag 1A, the extraction material can be extracted quickly at a sufficient concentration.

[0079] Figure 5 The extraction bag 1C shown is relative to Figure 1A The extraction bag 1A shown has a structure in which the first support portion 11 and the second support portion 12 are separated and the thin plate-like member 10 is punched out at the center portion 15 including the origin O. Figure 6 The extraction bag 1D shown in the figure is a bag in which the first gripping portion 13 and the second gripping portion 14 are adjacent to each other and opposite to each other. Figure 5 The extraction bag 1C shown in the top view has the structure of the central portion 15 removed. Figure 7 The extraction bag 1E shown is relative to Figure 6 The extraction bag 1D shown has a structure in which the fold line L1 and the fold line L2 are formed on a straight line. These extraction bags 1C, 1D, and 1E can also be used in the same manner as the above-mentioned extraction bag 1A, and can extract the extraction material quickly at a sufficient concentration.

[0080] Fig. 8A The extraction bag 1F shown is relative to Figure 1A The extraction bag 1A shown in the figure has different regions of attachment to the bag body in the first supporting portion 11 and the second supporting portion 12. That is, in the extraction bag 1F, in the A2 region where the first supporting portion 11 exists, the edge 11a of the edge of the attachment region of the first supporting portion 11, which is opposite to the first gripping portion 13, extends in the direction from the A2 region to the diagonal A4 region. In addition, in the A4 region where the second supporting portion 12 exists, the edge 12a of the edge of the attachment region of the second supporting portion 12, which is opposite to the second gripping portion 14, extends in the direction from the A4 region to the diagonal A2 region.

[0081] The fold line L1, which is the rotation axis for pulling up the first gripping portion 13, is formed approximately along the edge 11a on the first gripping portion 13 side relative to the edge 11a, and the fold line L2, which is the rotation axis for pulling up the second gripping portion 14, is formed approximately along the edge 12a on the second gripping portion 14 side relative to the edge 12a. Furthermore, these fold lines L1 and L21 are inclined with respect to the x-axis so that the first gripping portion 13 and the second gripping portion 14 overlap each other when the first gripping portion 13 and the second gripping portion 14 are pulled up.

[0082] Therefore, in the extraction bag 1F, although the end 13a of the first gripping part and the end 14a of the second gripping part do not overlap in the x direction, if the first gripping part 13 and the second gripping part 14 are pulled up, they overlap, and by replacing the portion coming to the front and the portion coming to the back in the overlapping portion, the first gripping part 13 and the second gripping part 14 can be engaged with each other. Moreover, the engaged state can be maintained even if the hand is removed from the extraction bag 1F.

[0083] Furthermore, if the first gripping portion 13 and the second gripping portion 14 of the extraction bag 1F are pulled up from the bag body so that they are engaged with each other, and the first gripping portion 13 and the second gripping portion 14 are pinched, the extraction bag 1F can be removed. Figure 8BAs shown in FIG. 1 , the bag body 3 has an upper surface that protrudes upward in a quadrangular pyramid shape, and a lower surface that curves gently and protrudes downward. Therefore, in the extraction bag 1F, the extraction material in the bag body also spreads widely on the surface opposite to the surface on which the thin plate-shaped member 10 is provided, and a large head space is formed in the bag body 3. This can further increase the extraction speed.

[0084] Fig.9A The extraction bag 1G shown is in Fig. 8A In the extraction bag 1F shown in the figure, the fold line L1 which is the rotation axis of the first gripping portion 13 and the fold line L2 which is the rotation axis of the second gripping portion 14 are omitted. Fig. 9B As shown in FIG. 1 , if the first gripping portion 13 and the second gripping portion 14 of the extraction bag 1G are pulled up so that their ends are engaged with each other, and the first gripping portion 13 and the second gripping portion 14 are pinched up, the extraction bag 1G becomes Fig. 8A The extraction bag 1F shown is shaped such that the upper surface of the bag body 3 protrudes upward, and the lower surface of the bag body 3 protrudes downward. Therefore, by omitting the fold lines L1 and L2, the extraction bag 1G has a structure that is easy to put into a cup with a smaller diameter.

[0085] In addition, in the extraction bag 1G, since the fold lines L1 and L2 are not formed, the rotation axis of the first gripping portion 13 when being pulled up is near the boundary line between the sticking area of ​​the first supporting portion 11 and the pullable area of ​​the first gripping portion 13, and the rotation axis of the second gripping portion 14 when being pulled up is near the boundary line between the sticking area of ​​the second supporting portion 12 and the pullable area of ​​the second gripping portion 14. These rotation axes are inclined with respect to the x-axis so that the first gripping portion 13 and the second gripping portion 14 overlap each other when the first gripping portion 13 and the second gripping portion 14 are pulled up. Therefore, the first gripping portion 13 and the second gripping portion 14 can be pulled up in advance and engaged with each other.

[0086] In addition, in the extraction bag 1G, the end 13a of the first gripping portion and the end 14a of the second gripping portion may be formed so as to overlap in the x direction.

[0087] Fig. 10A The extraction bag 1H shown is relative to Figure 1A The extraction bag 1A shown in FIG. 1 omits the fold line L1 between the first support portion 11 and the first gripping portion 13 and omits the fold line L2 between the second support portion 12 and the second gripping portion 14. In addition, the area of ​​the central portion 15 is increased compared to the extraction bag 1A shown in FIG. 1 . Therefore, if the first gripping portion 13 and the second gripping portion 14 of the extraction bag 1H are pulled up, their ends are engaged with each other, and the first gripping portion 13 and the second gripping portion 14 are pinched, then Fig. 10B As shown, the upper surface of the bag body 3 protrudes upward in a quadrangular pyramid shape, but the top portion thereof is gently and naturally curved.

[0088] In the extraction bag 1H, the length W1 of the overlap of the first gripping portion 13 and the second gripping portion 14 in the x direction is made larger than about 40% of the width W0 in the x direction of the thin plate-shaped member 10. Thus, the ends of the first gripping portion 13 and the second gripping portion 14 can be more reliably engaged with each other.

[0089] Fig.11A The extraction bag 1I shown is relative to Figure 1A The extraction bag 1A shown omits the fold line L1 between the first supporting portion 11 and the first holding portion 13 and the fold line L2 between the second supporting portion 12 and the second holding portion 14, and is formed so that the end edge 13c of the first holding portion 13 on the first supporting portion 11 side and the end edge 14c of the second holding portion 14 on the second supporting portion 12 side are placed on a straight line.

[0090] Furthermore, notches 13b and 14b are provided at the protruding end 13a of the first gripping portion and the protruding end 14a of the second gripping portion, respectively. Thus, the first gripping portion 13 and the second gripping portion 14 can be reliably engaged with each other.

[0091] A reinforcement portion 16 extending from the second supporting portion 12 is provided around the first gripping portion 13 , and a reinforcement portion 17 extending from the first supporting portion 11 is provided around the second gripping portion 14 . These reinforcement portions 16 , 17 are bonded to the bag body 3 .

[0092] If the first gripping portion 13 and the second gripping portion 14 of the extraction bag 1I are pulled up, the notches 13b and 14b are engaged with each other, and the first gripping portion 13 and the second gripping portion 14 are pinched up, Fig. 11B As shown, the bag body 3 is folded in half at the center to form a shape that is easier to put into a cup.

[0093] Furthermore, if the first gripping part 13 and the second gripping part 14 of the extraction bag 1I are held and the bag body 3 is sunk in hot water, the folded bag body 3 slightly expands in the horizontal direction, but the bag body 3 is stable in an inverted V shape when viewed from the side, and the first gripping part 13 and the second gripping part 14 can be maintained standing up from the hot water even when placed in hot water. Furthermore, if the bag body 3 is pushed into the hot water or moved up and down, the bag body 3 bends and stretches, and the bag body further expands in the horizontal direction. Therefore, with the extraction bag 1I, a large internal space is formed in the bag body 3, and the extraction material in the bag body is fully expanded horizontally, so that extraction can be performed quickly.

[0094] Fig. 12A In the extraction bag 1J shown in the figure, the ratio of the length W1 of the overlap of the first gripping portion 13 and the second gripping portion 14 in the x direction to the width W0 of the thin plate-shaped member in the x direction is set to Fig. 10A The extraction bag 1H shown is about 50% larger, and further, deep notches are provided as the notches 13b and 14b so that the first gripping portion 13 pulled up from the bag body 3 and the second gripping portion 14 are firmly engaged.

[0095] In addition, the thin plate-like member 10 has fold lines L3 and L4 formed on the extension line of the end edge 13c of the first holding portion 13 on the first supporting portion 11 side and the extension line of the end edge 14c of the second holding portion 14 on the second supporting portion 12 side. In addition, no fold line is formed on the end edges 13c and 14c. Therefore, if the first holding portion 13 and the second holding portion 14 of the extraction bag 1J are pulled up and the notches 13b and 14b are engaged with each other, as shown in FIG. Fig. 12B As shown, the upper surface of the bag body 3 is curved in a trapezoidal shape in a side view. As a result, the shape is stable when the first gripping portion 13 and the second gripping portion 14 are pinched and immersed in hot water. In addition, if the bag body 3 of the extraction bag 1J is immersed in hot water or moved up and down, the bag body 3 is bent and stretched, and the bag body 3 is expanded horizontally, forming a large internal space in the bag body, and the extract material is fully expanded horizontally in the bag body, so that the extract material can be quickly extracted at a sufficient concentration.

[0096] (Hand-filled extraction bag)

[0097] In each of the above-mentioned extraction bags 1A to 1J, the bag body 3 may be made into an empty bag in advance without filling the bag body 3 with the extraction material, and an opening for filling the extraction material may be provided in the bag body 3 to make a hand-filled extraction bag. According to the hand-filled extraction bag, each extraction bag user can fill the empty bag with the extraction material according to his or her own preference to obtain the extraction liquid.

[0098] Preferably, a mechanism for sealing the opening of the hand-filled extraction bag after filling the extraction material is pre-installed. For example, as a hand-filled empty bag corresponding to the extraction bag 1A described above, Fig.13 As shown in the hand-filled extraction bag 30, the bag body 3 is provided with a folded portion 5 in which a water-permeable filter sheet forming one surface of the bag body 3 is folded back to the outer surface of the surface with one side of the bag body 3 as a fold, and an opening 6 is formed at the position of the side. After the extraction bag user fills the extraction material M by hand from the opening 6 of the bag body 3, which has become an empty bag, the front and back sides of the folded portion 5 are reversed. Fig.14 The opening 6 can be closed as shown.

[0099] The mechanism 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 (chuck) described in Japanese Patent No. 4289363 may be provided at the opening 6, or a double-sided tape for food packaging may be used.

[0100] As mentioned above, although various aspects of the present invention have been described, in the present invention, the changes in the various aspects can be appropriately combined.

[0101] Description of Reference Numerals

[0102] 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J extraction bag

[0103] 3 bags main body

[0104] 5. Turn back

[0105] 6 Opening

[0106] 10 Thin plate parts

[0107] 11First support part

[0108] 11a Edge of the pasting area

[0109] 12 Second support part

[0110] 12a Edge of the pasting area

[0111] 13. First grip

[0112] 13a protruding end, end

[0113] 13b notch

[0114] 13c end edge

[0115] 14 Second grip

[0116] 14a protruding end, end

[0117] 14b notch

[0118] 14c end edge

[0119] 15 Central

[0120] 16 Strengthening Department

[0121] 17 Strengthening Department

[0122] 100 cups and other containers

[0123] 20 Extraction bag manufacturing sheet

[0124] 21 Water-permeable filter sheet

[0125] 22 vertical sealing part

[0126] 23 horizontal sealing part

[0127] 30 Hand Fill Extraction Bags

[0128] AHot water

[0129] D is the distance between the fold line L1 and the fold line L2 in the y-axis direction

[0130] L1, L2, L3, L4 polyline

[0131] O origin

[0132] W0 width of the thin plate-shaped component in the x direction

[0133] W1: Length of overlap between the end of the first gripping portion and the end of the second gripping portion in the x direction

[0134] M extraction material.

Claims

1. An extraction bag comprising a bag body formed of a water-permeable filter sheet, a thin plate-shaped member provided on one surface of the bag body, and an extraction material filled in the bag body, characterized in that: When the center of the thin plate-shaped member is set as the origin (0, 0), the straight line passing through the origin and in the short side direction of the thin plate-shaped member is set as the x-axis, the straight line passing through the origin and perpendicular to the x-axis is set as the y-axis, the area satisfying x>0 and y>0 is set as the A1 area, the area satisfying x<0 and y>0 is set as the A2 area, the area satisfying x<0 and y<0 is set as the A3 area, and the area satisfying x>0 and y<0 is set as the A4 area, The thin plate-like component has: A first support portion attached to the A2 region, a first grip portion that can be pulled up from the bag body and extends from the first support portion to the A3 region, a second support portion attached to the A4 region, a second grip portion that can be pulled up from the bag body and extends from the second support portion to the A1 region; or A first support portion attached to the A1 region, a first grip portion that can be pulled up from the bag body and extends from the first support portion to the A4 region, a second support portion attached to the A3 region, a second grip portion that can be pulled up from the bag body and extends from the second support portion to the A2 region; The first gripping portion and the second gripping portion pulled up from the bag body can engage with each other.

2. The extraction bag according to claim 1, characterized in that: An end portion of the first gripping portion on the opposite side to the first supporting portion and an end portion of the second gripping portion on the opposite side to the second supporting portion overlap in the x direction.

3. The extraction bag according to claim 1 or 2, characterized in that: The rotation axes of the first gripping portion and the second gripping portion for pulling up are inclined with respect to the x-axis so that the first gripping portion and the second gripping portion overlap each other when the first gripping portion and the second gripping portion are pulled up.

4. The extraction bag according to claim 1 or 2, characterized in that: The shape of the thin plate-shaped member is point-symmetrical.

5. The extraction bag according to claim 2, characterized in that: The length W1 of the overlap in the x direction between the end of the first gripping portion opposite to the first supporting portion and the end of the second gripping portion opposite to the second supporting portion is 5% or more of the width W0 of the thin plate-shaped member in the x direction.

6. The extraction bag according to claim 1 or 2, characterized in that: A fold line is provided between the first supporting portion and the first holding portion, and a fold line is provided between the second supporting portion and the second holding portion.

7. The extraction bag according to claim 1 or 2, characterized in that: The fold line between the first supporting portion and the first holding portion and the fold line between the second supporting portion and the second holding portion are spaced apart in the y direction.

8. The extraction bag according to claim 7, characterized in that: The fold line between the first supporting part and the first holding part is located in the region A1 to A4 where the first supporting part is attached, and the fold line between the second supporting part and the second holding part is located in the region A1 to A4 where the second supporting part is attached.

9. The extraction bag according to claim 1 or 2, characterized in that: The first supporting portion and the first holding portion are continuous without sandwiching a folding line, and the second supporting portion and the second holding portion are continuous without sandwiching a folding line.

10. The extraction bag according to claim 1 or 2, characterized in that: The first supporting portion and the second supporting portion are continuous.

11. The extraction bag according to claim 1 or 2, characterized in that: The edge of the edge of the pasting area of ​​the first supporting part, which is opposite to the first holding part, extends in the direction from the area where the first supporting part is pasted to the diagonal area, and the edge of the edge of the edge of the pasting area of ​​the second supporting part, which is opposite to the second holding part, extends in the direction from the area where the second supporting part is pasted to the diagonal area.

12. The extraction bag according to claim 1 or 2, characterized in that: A reinforcement portion extending from the second supporting portion is provided around the first gripping portion, and a reinforcement portion extending from the first supporting portion is provided around the second gripping portion. These reinforcement portions are bonded to the bag body.

13. The extraction bag according to claim 1 or 2, characterized in that: The first gripping portion and the second gripping portion have notches that engage with each other.

14. A hand-filled extraction bag, characterized in that: In the extraction bag according to any one of claims 1 to 13, the bag body is not filled with an extraction material, and an opening for filling the extraction material is provided in the bag body.

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