Extraction bag

Abstract

The extraction bag (1A) has a bag body (3) formed of a water-permeable filter sheet (2), a thin plate-like 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) that face each other, and an upper edge (4a) that forms their edges. The thin plate-like 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, and they (10A, 10B) are continuous via a first horizontal folding line (Lh1) along the upper edge (4a). The thin plate-like member (10) has: a pair of long-sized regions (12) that straddle the first member (10A) and the second member (10B), sandwich the central pasting portion (11) of the first member (10A) from the left and right, and are opposed to each other by being pulled up from the bag body; and a vertical folding line (Lv1) that enables the pulling up of the long-sized regions (12). This extraction bag (1) is a tea bag-type extraction bag filled with an extraction material such as coffee powder, and it is easy to sink the bag body in hot water or move it up and down.

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 filter sheet is immersed in hot water to obtain an extract. Background Art

[0002] In the past, tea bags, which are water-permeable bags with hanging strings and filled with these teas, were widely used 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, teabag-type coffee extraction bags are also used, in which the bag filled with coffee powder is immersed in hot water. However, even if a teabag-type coffee extraction bag is immersed in hot water, the coffee powder contains carbon dioxide, so the bag filled with coffee powder tends to float in the hot water, making it difficult to fully extract the coffee. Therefore, the following structure has been proposed: a hook formed of a thin plate-like member is pre-attached to one side of the bag filled with coffee powder, and the hook can be hooked to the edge of a cup to prevent the bag filled with coffee powder from floating in the hot water (Patent Document 1).

[0003] In addition, the following structure has been proposed: a handle 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 handle portion is moved up and down in hot water immersed in the bag body to promote coffee extraction (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 Laid-Open No. 2006-273379. Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, in a conventional coffee extraction bag in which a bag body filled with coffee powder is immersed in hot water, even if the hook piece or handle portion formed of a thin plate-like member is held and an attempt is made to forcibly sink the bag body that wants to float in the hot water, the thin plate-like member bends or flexes, and it is difficult to sink the bag body in the hot water. Even if the hook piece or handle portion is moved up and down to promote coffee extraction, the bag body does not move up and down in the hot water in the same manner as the holding portion. In addition, even if the bag body temporarily sinks in the hot water, only the surface layer of the entire coffee powder filled in the bag body swells with the hot water, and it is difficult for the hot water to penetrate to the inside 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 having the same concentration as that of the drip type in a time equal to or less than that of the drip type.

[0010] In view of this, an object of the present invention is to provide a tea bag-type extraction bag that obtains an extraction liquid by immersing a bag body filled with an extraction material such as coffee powder in hot water, enabling the bag body to be easily sunk in the hot water or moved up and down, and further enabling the hot water to cover the entire extraction material in the bag body, and enabling a sufficient concentration of extraction liquid to be easily obtained.

[0011] Means for Solving the Problem

[0012] The present inventors have conceived that in a tea bag-type extraction bag in which a thin plate-like member is attached to a bag body filled with an extraction material, by forming the thin plate-like member into a specific shape, the thin plate-like member can be formed into a hard rod shape protruding from the central portion of the bag body. By holding the rod portion, the bag body can be easily sunk in the hot water or moved up and down. In addition, the area of the upper surface and the top space of the portion occupied by the extraction material in the bag body can be increased. When the bag body is moved up and down in the hot water, the hot water flows downward with respect to the upper surface of the extraction material in the bag body, and the hot water easily penetrates into the inside of the extraction material, thus completing the present invention.

[0013] That is, the present invention provides an extraction bag including a bag body formed of a water-permeable filter sheet, a thin plate-like member provided on the outer surface of the bag body, and an extraction material filled in the bag body. The bag body has a first surface and a second surface facing each other, and an upper edge forming the edges of these two surfaces. When the bag body is unfolded such that the first surface is located below the upper edge and the second surface is located above, the thin plate-like 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. The first member and the second member are continuous via a first horizontal fold line along the upper edge. In addition, the thin plate-like member has a central adhesive portion that is adhered to the first surface of the bag body at the central portion of the first member, a pair of long-sized regions that straddle the first member and the second member and can be pulled up from the bag body, sandwiching the central adhesive portion from the left and right, and a vertical fold line that enables the pair of long-sized regions to be pulled up from the sides close to the side edges of the bag body and opposed to each other.

[0014] In addition, the present invention provides an extraction bag for hand filling. In the above-mentioned extraction bag, the extraction material is not filled in the bag body, and an opening for filling the extraction material is provided in the bag body.

[0015] Advantages of the Invention

[0016] According to the present invention, by bending a pair of long-sized regions of the thin plate-like member provided on the outer surface of the bag body filled with the extraction material so that they face each other, the pair of long-sized regions suppress each other's flexure and become a hard rod-like shape protruding from one surface of the bag body. Therefore, by holding this rod-like portion, the bag body can be easily immersed in hot water or moved up and down. Thus, hot water can easily penetrate into the bag body.

[0017] In addition, since the pair of long-sized regions are provided across the opposing two surfaces of the bag body, by making it into a rod-like shape, the portion that becomes rod-like is longer than in the case of making a structure provided only on a single surface of the bag body into a rod-like shape. Therefore, when holding the rod-like portion and immersing the bag body in hot water or moving it up and down, the hand holding the rod-like portion can be prevented from getting hot due to the hot air.

[0018] Furthermore, according to the present invention, by holding the rod-like portion obliquely, the shape of the portion occupied by the extraction material in the bag body can be changed so that the area of its upper surface expands, and the top space can also be expanded. Thus, the hot water flowing into the bag body easily flows downward from the upper surface of the extraction material, and extraction is promoted not only from the surface of the portion occupied by the extraction material in the bag body but from the whole. In particular, in the form in which the second surface of the bag body is pulled up by the central pulling portion of the thin plate-like member, it is also possible to prevent the bag body from being pulled downward and flattened due to the weight of the extraction material by the pulling of the central pulling portion, and the top space is expanded. Furthermore, in the form in which a reinforcing portion extending in the width direction of the bag body is provided below the rod-like portion, contraction in the width direction of the bag body can be prevented, and the entire space inside the bag body is expanded.

[0019] Thus, according to the present invention, the extraction speed can be increased, and an extraction liquid having a concentration equal to or higher than that of the drip filtration type extraction method can be easily obtained in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A It is a front view (plan view of the first component side) of the extraction bag 1A of the embodiment.

[0021] Figure 1B It is a rear view (plan view of the second component side) of the extraction bag 1A of the embodiment.

[0022] Figure 2It is an exploded view of the extraction bag 1A of the embodiment.

[0023] Figure 3 It is a perspective view of the extraction bag 1A in a state where the second component of the sheet-like component is pulled up from the second surface of the bag body.

[0024] Figure 4A It is a side view of the extraction bag 1A of the embodiment in a state where the long-sized region is pulled up.

[0025] Figure 4B It is a perspective view of the extraction bag 1A of the embodiment in a state where the long-sized region is pulled up as viewed from the first surface side of the bag body.

[0026] Figure 4C It is a perspective view of the extraction bag 1A of the embodiment in a state where the long-sized region is pulled up as viewed from the second surface side of the bag body.

[0027] Figure 5 It is a plan view of the sheet for manufacturing the extraction bag.

[0028] Figure 6 It is an explanatory diagram of the manufacturing method of the extraction bag.

[0029] Figure 7 It is an exploded view of the extraction bag 1B of the embodiment.

[0030] Figure 8 It is a side view of the extraction bag 1B of the embodiment in a state where the long-sized region is pulled up.

[0031] Figure 9 It is an exploded view of the extraction bag 1C of the embodiment.

[0032] Figure 10 It is a perspective view of the extraction bag 1C of the embodiment in a state where the long-sized region is pulled up.

[0033] Figure 11 It is an exploded view of the extraction bag 1D of the embodiment.

[0034] Figure 12 It is a perspective view of the extraction bag 1D of the embodiment in a state where the long-sized region is pulled up.

[0035] Figure 13 It is a perspective view of the extraction bag 1D in a state where the long-sized region is pulled up and the hooking portion 16 is hooked on the cup.

[0036] Figure 14 It is an exploded view of the extraction bag 1E of the embodiment.

[0037] Figure 15 It is a perspective view of the extraction bag 1E of the embodiment in a state where the long-sized region is pulled up.

[0038] Figure 16 It is an exploded view of the extraction bag 1F of the embodiment.

[0039] Figure 17 It is a perspective view of the extraction bag 1F of the embodiment in a state where the long-sized region is pulled up.

[0040] Figure 18 It is an exploded view of the extraction bag 1x of the comparative example.

[0041] Figure 19 It is a perspective view of the extraction bag 1x of the comparative example in a state where the long-sized region is pulled up.

[0042] Figure 20 It is an exploded view of the extraction bag lG of the embodiment.

[0043] Figure 21 It is a perspective view of the extraction bag 30 for manual filling of the embodiment.

[0044] Figure 22 It is a perspective view of the extraction bag 30 for manual filling of the embodiment in a state where the opening is closed. Detailed Embodiment

[0045] Hereinafter, the present invention will be specifically described while referring to the drawings. In addition, in each figure, the same reference numerals denote the same or equivalent constituent elements.

[0046] (Overall Structure)

[0047] Figure 1A 、 Figure 1B They are respectively a front view (plan view of the first component side) and a rear view (plan view of the second component side) of the extraction bag 1A of an embodiment of the present invention in a state where the long-sized region of the thin plate-like component is not pulled up. In addition, Figure 4A It is a side view of the extraction bag 1A in a state where the long-sized region of the thin plate-like component is pulled up, [[ID=4(2]] Figure 4B It is a perspective view of the extraction bag 1A observed from the first surface side of the bag body, Figure 4C It is a perspective view of the extraction bag 1A observed from the second surface side of the bag body.

[0048] The extraction bag 1A has a bag body 3 formed of a flat bag made of a water-permeable filter sheet, a thin plate-like component 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 opposed first surface 3A and second surface 3B, and an upper edge 4a as the edge of these two surfaces. In the present embodiment, the upper edge 4a becomes a mountain fold of the first surface 3A and the second surface 3B.

[0049] Figure 2This is an exploded view of the extraction bag 1A, showing the first surface A of the bag body on the lower side of the paper surface of the upper edge 4a and the first component 10A of the sheet-like component 10 provided on the first surface 3A, and the second surface 3B of the bag body and the second component 10B of the sheet-like component 10 provided on the second surface 3B on the upper side of the paper surface of the upper edge 4a. In this figure, the area filled with oblique lines represents the pasting area of the sheet-like component 10 and the bag body 3, and the area filled with dots represents the part of the bag body 3 exposed in the exploded view. In addition, in the present invention, the pasting area is not limited to the illustrated form.

[0050] The first component 10A and the second component 10B are continuous via the first horizontal folding line Lh1, and the first horizontal folding line Lh1 overlaps with the upper edge 4a of the bag body and extends along the upper edge 4a.

[0051] In the central part of the first component 10A, a central pasting part 11 for pasting with the first surface 3A of the bag body is formed. In the pasting area of the central pasting part 11, it is preferably at least near the first horizontal folding line Lh1. In this embodiment, substantially the entire surface of the central pasting part 11 is pasted with the bag body 3.

[0052] On the sheet-like component 10, a pair of long-sized regions 12 (the regions surrounded by the double-dot chain line in Figure 2 ) that sandwich the central pasting part 11 from left and right are formed. The long-sized regions 12 are formed across the first component 10A and the second component 10B and can be pulled up from the bag body 3.

[0053] In addition, on the sheet-like component 10, a longitudinal folding line is formed, which can pull up each of the pair of long-sized regions 12 from the side closer to the side edge 4b of the bag body, such as Figure 4A , Figure 4B , Figure 4CThey are opposed to each other as shown. The longitudinal folding line extends in the longitudinal direction of the long-sized region 12 and becomes the rotation axis for pulling up when the pair of long-sized regions 12 are pulled up. In addition, in the present invention, the longitudinal folding line that can pull up the pair of long-sized regions 12 and oppose them may not be strictly formed in the longitudinal direction of the long-sized region or the up-and-down direction of the bag body, and may be formed obliquely with respect to the longitudinal direction of the long-sized region 12 like the fourth longitudinal folding line Lv4 described later. On the other hand, in the present invention, it is preferable that at least one pair of the longitudinal folding lines are formed in the first member 10A, more preferably at least one pair are also formed in the second member 10B, and further preferably the longitudinal folding lines of the second member 10B are formed on the extension line of the longitudinal folding lines of the first member 10A. In the present embodiment, since in the first member 10A, the left and right side edges 11a of the central adhesive portion 11 are separated from the long-sized region 12, a pair of first longitudinal folding lines Lv1 are formed at the end of the long-sized region 12 on the side closer to the bottom edge 4c of the bag body than the central adhesive portion 11 in the first member 10A. In addition, a pair of second longitudinal folding lines Lv2 extending from the first horizontal folding line Lhl are formed in the second member 10B, and further, a third longitudinal folding line Lv3 is formed at the portion where the ends of the pair of long-sized regions 12 are continuous with each other.

[0054] In addition, the horizontal folding line Lhl and the longitudinal folding lines Lvl, Lv2, and Lv3 of the sheet-like member 10 can be formed by a perforation line, a half-cut line, a crease, or the like.

[0055] It is a characteristic structure of the present invention to form a structure in which a pair of long-sized regions 12 straddling the first member 10A and the second member 10B are pulled up from the bag body 3 by the longitudinal folding line and opposed to each other, and when the extraction material in the bag body 3 is immersed in hot water, the pair of long-sized regions 12 pulled up from the bag body 3 can function as long-sized and hard rod-shaped handles.

[0056] In the present embodiment, the first member 10A has a reinforcing portion 13 ([ Figure 2 ) adhered to the bag body 3 on the side closer to the bottom edge 4c of the bag body than the lower end portion of the long-sized region 12. As a result, the longitudinal folding line LVl that becomes the axis for pulling up the lower end portion of the long-sized region 12 is sandwiched between the central adhesive portion 11 and the reinforcing portion 13, and the strength of the lower end portion is improved. In addition, the reinforcing portion 13 extends in the width direction of the bag body. Therefore, the shrinkage of the bag body in the width direction caused by the weight of the extraction material is prevented, and a larger space can be ensured inside the bag body 3. In addition, in the present invention, the reinforcing portion 13 is provided as needed.

[0057] On the other hand, in the present embodiment, the second member 10B has a central upper end portion 14 that extends from the first horizontal folding line Lh1 between the pair of long-sized regions 12. The central upper end portion 14 is connected to the long-sized region 12 via the second vertical folding line Lv2 and is not adhered to the bag body 3, but floats. In addition, the second member 10B has a central pulling portion 15 that is connected to the central upper end portion 14 via the second horizontal folding line Lh2. The central pulling portion 15 is separated from the long-sized region 12. In addition, the central pulling portion 15 has an adhesion region 15A to the bag body at a portion away from the central upper end portion 14. Thus, in a state where the pair of long-sized regions 12 are pulled up from the bag body 3 and opposed to each other, as Figure 4A 、 Figure 4C shown, the central portion of the second surface 3B of the bag body is pulled upward in the direction of the upper edge 4a of the bag body, and in the bag body, the area of the upper surface of the portion occupied by the extraction material is enlarged, and the headspace is also enlarged. Thus, the extraction of the extraction material can be efficiently performed by the hot water flowing into the bag body, and the time required to obtain an extraction liquid of a predetermined concentration can be shortened.

[0058] (Extraction material)

[0059] Examples of the extraction material filled into the bag body 3 include coffee powder, tea leaves such as black tea and green tea, and Chinese herbal medicines. Generally, when coffee powder is filled into the bag body 3 and is to be immersed in hot water, the bag body is likely 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 pulling up the long-sized region 12 to make it a hard rod shape and using this rod-shaped portion as a handle extending from the central portion of the bag body 3, it is easy to sink the bag body 3 into the hot water in a cup or move it up and down in the hot water. Thus, not only does the hot water penetrate the surface layer of the entire coffee powder in the bag body, but the hot water also penetrates into the interior, so that an extraction liquid can be efficiently obtained from the entire coffee powder. The same applies to extraction materials other than coffee powder, and hot water can penetrate the extraction material, and an extraction liquid can be efficiently obtained from the entire extraction material.

[0060] In addition, in the extraction bag of the present invention, since the extraction material is used in a state of being sealed in the bag body 3, the extraction material does not scatter outside the bag body during the use of the extraction bag.

[0061] (Bag body)

[0062] In this embodiment, the bag body 3 is shaped as a flat bag with a folded top edge serving as a water-permeable filter sheet, forming a three-way sealed bag. In the present invention, the bag body 3 is not limited to a flat bag; for example, it can also be a gusset bag with triangular panels on the bottom or sides. Furthermore, the top edge 3a of the bag body 3 is not limited to a folded top edge; it can also be a sealed edge. However, due to the manufacturing process of the extraction bag, a folded top edge is preferred.

[0063] The net planar dimensions of the bag body 3 can be appropriately set according to the size of the cup or container used when obtaining the extract using the extraction bag. For example, the bag body 3 can be made into a size suitable for commercially available coffee cups.

[0064] (Water-permeable filter sheet)

[0065] The water-permeable filter sheet forming the bag body can be made of a variety of materials with water permeability and filterability to facilitate extraction of the extractable material. The structural material of the water-permeable filter sheet can also be appropriately selected based on the type of extractable material. For example, commonly known water-permeable filter sheets for extracting beverages include woven or non-woven fabrics composed of synthetic fibers such as polyester, nylon, polyethylene, polypropylene, and vinylon; semi-synthetic fibers such as rayon; natural fibers such as paper mulberry and jasmine; blended paper composed of Manila hemp, wood pulp, and polypropylene fibers; and tea bag base paper. These can also be used in the present invention. Considering the post-use disposal nature of the extraction bag, it is preferable that the water-permeable filter sheet contain biodegradable fibers. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, and polyethylene succinate. Furthermore, from the viewpoint of providing transparency to the water-permeable filter sheet so as to allow visibility of the state of the extraction material in the bag body, it is preferable to reduce the content of inorganic pigments or to exclude the inorganic pigments.

[0066] Furthermore, compared to drip-type extraction bags, which directly inject hot water into the extract, the extraction bag of the present invention necessarily supplies hot water to the extract through a water-permeable filter sheet. Therefore, as long as the extract does not leak, it is preferable to use a water-permeable filter sheet with a coarser mesh than that used in drip-type extraction bags. For example, when using coffee powder as the extract, the air permeability of the water-permeable filter sheet can be 130 to 600 cm. 3 / cm 2 / sec (JIS LH1096 air permeability method A (method using a Frazier type air permeability tester)).

[0067] (Thin plate-shaped parts)

[0068] The thin plate-like member preferably has hydrophobicity and can be formed by punching thin plate-like materials such as cardboard and plastic sheets laminated with resin on the surface. From the perspective of the disposability after use of the extraction bag 1A, it is preferably formed of biodegradable materials such as polylactic acid, polybutylene succinate, and polyethylene glycol succinate.

[0069] (Usage method)

[0070] As the packaging and circulation form of the extraction bag 1A, it is preferable that, as shown in Figure 1A , Figure 1B , the entire thin plate-like member 10 is on the surface of the bag body 3 and the bag body is in a flattened state. Therefore, as the usage method from this state, first, as shown in Figure 3 , the second member 10B of the thin plate-like member is pulled up from the second surface 3B of the bag body so that the first member 10A and the second member 10B are substantially in the same plane. At this time, the adhesive area 15A ( Figure 2 ) of the central pulling portion 15 on the second surface 3B of the bag body is pulled upward in the direction of the upper edge 4a, and the shape of the bag body 3 starts from the flat state, the first surface 3A bends, the area of the upper surface of the part occupied by the extraction material in the bag body expands, and the top space also expands.

[0071] Next, as shown in Figure 4B , the thin plate-like member is bent at the first longitudinal folding line Lv1, the second longitudinal folding line Lv2, and the third longitudinal folding line Lv3 so that the pair of long-sized regions 12 face each other. As a result, the pair of long-sized regions 12 become long-sized and rigid rod-like. Therefore, hold this rod-like part and 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. And, through the rod-like part formed by the long-sized region 12, the bag body can be sunk in hot water or moved up and down in hot water, thereby increasing the extraction speed of the extraction material. At this time, the rod-like part formed by the long-sized region 12 on the first surface 3A in the rod-like part spanning the length of the first surface 3A and the second surface 3B of the bag body is fixed to the first surface 3A, and the rod-like part pulled up from the second surface 3B is located above the upper edge 4a of the bag body 3. The rod-like part above the upper edge 4a of the bag body 3 can be held by hand, so even if the container contains hot water, it is possible to prevent the hand holding the rod-like part from getting hot due to the hot air. Of course, extraction can also be carried out with cold water as needed. In addition, the rod-like part can also be erected on the inner wall of a container such as a cup, and the bag body can be placed in the container.

[0072] After extraction, the bag body can be taken out of the container by holding the rod-like part.

[0073] In this way, according to this extraction bag 1A, an extraction solution with a desired concentration can be obtained simply and quickly.

[0074] (Manufacturing method)

[0075] As a manufacturing method of the extraction bag 1A, for example, prepare the following sheet 20 for manufacturing the extraction bag: As Figure 5 shown, the first horizontal folding line Lh1 of the thin plate-like member 10 is aligned with the long side direction of the long-sized water-permeable filter sheet 21, and the thin plate-like members 10 are arranged and pasted on the water-permeable filter sheet 21 at a prescribed interval. In the figure, the area sandwiched by the double-dot chain line is used for manufacturing one extraction bag.

[0076] By using this sheet 20 for manufacturing the extraction bag in a packaging and filling machine, the extraction bag 1A can be continuously manufactured. In this case, first, as Figure 6 shown, the two sides in the long side direction of the sheet 20 for manufacturing the extraction bag are folded so that they coincide, and the sides in the long side direction are welded to each other to form a longitudinal seal portion 22, thereby forming a cylindrical body. Next, by alternately repeating the formation of the transverse seal portion 23 that welds the cylindrical body in the short side direction and the filling of the extraction material M into the bag body 3, a continuous body of extraction bags 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 the extraction bag 1A. Alternatively, at the time of forming the transverse seal portion 23 in the short side direction of the cylindrical body, fusing is also performed simultaneously to continuously manufacture the extraction bags 1A that are separately cut off.

[0077] (Modified form)

[0078] The extraction bag of the present invention can have various modification points. For example, the extraction bag 1B having the Figure 7 shown developed view omits the central pulling-up portion 15 with respect to the Figure 2 shown developed view of the extraction bag lA, and exposes the bag body of this part. According to this extraction bag 1B, even if the rod-shaped portion composed of a pair of long-sized regions 12 is inclined as Figure 8 shown, the central pasting portion 11 of the bag body 3 can be held by the rod-shaped portion. Therefore, when extracting the extraction material, by inclining the rod-shaped portion, compared with the case where the rod-shaped portion is erected in the vertical direction, the shape of the portion occupied by the extraction material in the bag body 3 can be changed so that its upper surface expands, and the top space can also be expanded. Therefore, it is also easy to extract from the entire extraction material in the bag body by this extraction bag 1B.

[0079] Having Figure 9 shown developed view of the extraction bag 1C with respect to Figure 2The extraction bag 1A of the unfolded view shown is configured such that the long-sized regions 12 provided on both sides of the central pasting portion 11 in the first member are continuous via the longitudinal folding line Lv1'. This longitudinal folding line Lv1' is a line obtained by extending the second longitudinal folding line Lv2 between the central upper end portion 14 and the long-sized regions 12 provided on both sides thereof in the second member 10B to the first member 10A. As a result, the portion that holds the rotation axis when the long-sized region 12 is pulled up on the surface of the bag body becomes longer than the Figure 2 extraction bag 1A of the unfolded view shown, and the mounting strength of the rod-shaped member formed by pulling up the pair of long-sized regions 12 with respect to the bag body 3 is improved.

[0080] In addition, in this extraction bag 1C, the first member 10A has a reinforcing portion 13a that is pasted to the bag body 3 on the outer periphery of the long-sized region 12, and this reinforcing portion 13a extends over the upper edge 4a of the bag body to the upper portion of the second member 10B, and a reinforcing portion 13b that is pasted to the bag body is also formed on the upper portion of the second member 10B. Therefore, in the state where the long-sized region 12 is pulled up, as Figure 10 shown, the upper portion of the second surface 3B of the bag body is pressed by the reinforcing portion 13b, and by partially pulling up the second surface 3B of the bag body by the central pulling portion 15, the top space inside the bag body is more easily expanded, and the extraction speed can be further increased.

[0081] Having Figure 11 the extraction bag 1D of the unfolded view shown, with respect to the extraction bag 1C of the unfolded view shown, the first member 10A is provided with a hook portion 16 that protrudes in an L-shape on the side portions of the pair of long-sized regions 12. If the long-sized region 12 is pulled up in the extraction bag 1D, then as Figure 9 shown, the hook portion 16 can be made to protrude with respect to the formation surface of the central pasting portion 11, so as Figure 12 shown, the hook portion 16 can be hooked on the opening wall of the cup 100 during the extraction of the extraction material. Therefore, during extraction, the hand can also be removed from the extraction bag 1D while maintaining the state where the bag body 3 is immersed in hot water, and the extraction bag 1D can also be hooked on an empty cup for draining the extraction bag 1D before discarding the extraction bag 1D after extraction. Figure 13

[0082] Figure 14 Having Figure 11 the extraction bag 1E of the unfolded view shown, with respect to the extraction bag 1D of the unfolded view shown, the ends of the pair of long-sized regions of the second member 10B are not made continuous via the third longitudinal folding line Lv3, but are made independent. In addition, notch portions 17 are provided at the ends of the pair of long-sized regions 12 of the second member 10B, respectively. Therefore, as Figure 15 ​​As shown, the ends of the long-sized region 12 pulled up from the bag body can be engaged with each other by the notch 17. In this extraction bag 1E, the long-sized region 12 also functions as a hard rod-shaped portion.

[0083] having Figure 16 The extraction bag 1F having the developed view shown in FIG. omits the central pulling-up portion 15, reinforcing portions 13, 13a, 13b, etc. compared to the above-mentioned extraction bag, but has a central pasting portion 11 at the central portion of the first member 10A, and a pair of long-sized regions 12 sandwiching the central pasting portion 11 are formed across the first member 10A and the second member 10B. Further, between the central pasting portion 11 and the long-sized region 12, a pair of fourth longitudinal folding lines Lv4 are formed obliquely with respect to the long side direction of the long-sized region 12.

[0084] In this extraction bag 1F, also if the thin plate-like member is bent along the longitudinal folding lines Lv3, Lv4 and the pair of long-sized regions 12 are pulled up from the bag body 3 to face each other, then as Figure 17 shown, a hard rod-shaped portion protruding from the first surface 3A of the bag body can be formed by the long-sized region 12, and by gripping this rod-shaped portion, the bag body 3 can be immersed in hot water or moved up and down in hot water, and the extraction speed can be increased.

[0085] Further, since an upper pasting portion 18 for pasting to the bag body is formed in the portion of the second member 10B sandwiched by the pair of long-sized regions 12, if the long-sized regions 12 are pulled up to face each other, then as Figure 17 shown, the body portion of the bag body expands and the top space expands. By this expansion, the extraction bag 1F can also increase the extraction speed of the extraction material.

[0086] On the other hand, having Figure 18 The extraction bag 1x of the comparative example having the developed view shown in FIG. compared to the extraction bag 1F having the developed view shown in Figure 16 FIG., only a pair of long-sized regions 12 are formed in the second member 10B. Therefore, if the pair of long-sized regions 12 are pulled up from the bag body to face each other, then as Figure 19 shown, the first member 10A and the second member 10B are bent at the first horizontal folding line Lh1. Further, the bag body 3 hangs down in a flat state from the first horizontal folding line Lh1. Therefore, it is difficult to immerse the bag body 3 in hot water or move the bag body up and down in hot water with the long-sized region 12 pulled up from the bag body 3, and the effects of the present invention cannot be obtained.

[0087] In the present invention, the lengths of the first member and the second member in the long side direction may be the same or different. For example, the extraction bag 1G having the developed view shown in Figure 20 FIG. is the above-mentioned Figure 2In the extraction bag lA of the developed view, the length of the second component is extended toward the bottom edge 4c side of the second surface 3B of the bag body, so that the length of the long dimension area 12 becomes longer, thereby making the portion that can be held longer.

[0088] (Extraction bag for manual filling)

[0089] In each of the above extraction bags 1A, 1B, 1C, 1D, 1E, 1F, 1G, the bag body 3 may not be filled with the extraction material in advance and the bag body 3 may be made an empty bag in advance, and an opening for filling the extraction material may be provided in the bag body 3 to make an extraction bag for manual filling. With the extraction bag for manual filling, each extraction bag user can fill the extraction material into the empty bag according to their own preferences to obtain the extraction solution.

[0090] Preferably, a mechanism for closing the opening after filling the extraction material is provided in advance at the opening of the extraction bag for manual filling. For example, as the empty bag for manual filling corresponding to the aforementioned extraction bag 1A, as Figure 21 shown in the extraction bag for manual filling 30, as long as a folding portion 5 for folding the water-permeable filter sheet forming the first surface 3 back to the surface side is provided in the lower part of the first surface 3A of the bag body 3, and the lower end of the bag body 3 is not sealed to form an opening 6. After the extraction bag user manually fills the extraction material M from the opening 6 of the bag body 3 that has become an empty bag, by turning the front and back sides of the folding portion 5 over, as Figure 22 shown, the opening 6 can be closed.

[0091] As the mechanism for closing the opening 6 of the empty bag, it is not limited to providing the folding portion 5 at the lower part of the bag body 3. For example, a zipper described in Japanese Patent No. 4289363 may be provided at the opening 6, or a double-sided tape for food packaging may be used.

[0092] The above describes various forms of the present invention, but the points of change in various forms in the present invention can be appropriately combined.

[0093] Explanation of reference numerals

[0094] 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1x Extraction bag

[0095] 2 Water-permeable filter sheet

[0096] 3 Bag body

[0097] 3a Upper edge of the bag body

[0098] 3A First surface

[0099] 3B Second surface

[0100] 4a Upper edge

[0101] 4b Side

[0102] 4c Bottom Edge

[0103] 5 Folded-back Portion

[0104] 6 Opening

[0105] 10 Sheet-like Component

[0106] 10A First Component

[0107] 10B Second Component

[0108] 11 Central Adhesive Portion

[0109] 11a Side of Central Adhesive Portion

[0110] 12 Long-sized Region

[0111] 13, 13a, 13b Reinforcement Portions

[0112] 14 Central Upper End

[0113] 15 Central Pull-up Portion

[0114] 15A Adhesive Region

[0115] 16 Hanging Portion

[0116] 17 Notch

[0117] 18 Upper Adhesive Portion

[0118] 20 Sheet for Manufacturing Extraction Bag

[0119] 21 Long-sized Water-permeable Filtering Sheet

[0120] 22 Longitudinal Sealing Portion

[0121] 23 Transverse Sealing Portion

[0122] 30 Extraction Bag for Manual Filling

[0123] 100 Cup

[0124] Lhl First Transverse Folding Line

[0125] Lh2 Second Transverse Folding Line

[0126] Lv1 First Longitudinal Folding Line

[0127] Lv1’ Longitudinal Folding Line

[0128] Lv2 Second Longitudinal Folding Line

[0129] Lv3 Third Longitudinal Folding Line

[0130] Lv4 Fourth Longitudinal Folding Line

[0131] 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 the outer surface of the bag body, and an extraction material filled in the bag body, characterized in that: The bag body has a first surface and a second surface facing each other, and an upper side forming an edge of the two surfaces; When the bag body is unfolded so that the first surface is located below the upper side and the second surface is located above, The thin plate-shaped member includes a first member on the first surface of the bag body and a second member on the second surface of the bag body, the first member and the second member being continuous via a first transverse fold line along the upper side; The thin plate-like component has: The central adhesive portion is located at the central portion of the first component and is adhered to the first surface of the bag body; A pair of long areas, spanning the first and second components, can be pulled up from the bag body to sandwich the central adhesive portion from left and right; as well as The longitudinal folding lines enable the pair of long regions to be pulled up from the sides close to the side edges of the bag body and to face each other.

2. The extraction bag according to claim 1, wherein In the second member, the front end portions of the pair of elongated regions are continuous via the longitudinal fold line.

3. The extraction bag according to claim 1, wherein The second component has between the pair of long areas: The central upper end portion extends from the first transverse fold line, is connected to the pair of long-length regions via the fold line, and is not adhered to the bag body; as well as The central pull-up portion is connected to the central upper end portion via a fold line and is separated from the long area; The portion of the central pull-up portion that is away from the central upper end portion is adhered to the bag body.

4. The extraction bag according to claim 2, characterized in that The second component has between the pair of long areas: The central upper end portion extends from the first transverse fold line, is connected to the pair of long-length regions via the fold line, and is not adhered to the bag body; as well as The central pull-up portion is connected to the central upper end portion via a fold line and is separated from the long area; The portion of the central pull-up portion that is away from the central upper end portion is adhered to the bag body.

5. The extraction bag according to claim 1, wherein In the first member, the left and right side edges and the long region of the central adhesive portion are cut away, and the longitudinal fold line is formed closer to the bottom edge of the bag body than the central adhesive portion.

6. The extraction bag according to claim 2, characterized in that In the first member, the left and right side edges and the long region of the central adhesive portion are cut away, and the longitudinal fold line is formed closer to the bottom edge of the bag body than the central adhesive portion.

7. The extraction bag according to claim 3, wherein In the first member, the left and right side edges and the long region of the central adhesive portion are cut away, and the longitudinal fold line is formed closer to the bottom edge of the bag body than the central adhesive portion.

8. The extraction bag according to claim 4, wherein In the first member, the left and right side edges and the long region of the central adhesive portion are cut away, and the longitudinal fold line is formed closer to the bottom edge of the bag body than the central adhesive portion.

9. The extraction bag according to claim 1, wherein In the first member, the central bonding portion and the elongated regions provided on the left and right sides thereof are continuous via the longitudinal folding lines.

10. The extraction bag according to claim 2, wherein In the first member, the central bonding portion and the elongated regions provided on the left and right sides thereof are continuous via the longitudinal folding lines.

11. The extraction bag according to claim 3, wherein In the first member, the central bonding portion and the elongated regions provided on the left and right sides thereof are continuous via the longitudinal folding lines.

12. The extraction bag according to claim 4, wherein In the first member, the central bonding portion and the elongated regions provided on the left and right sides thereof are continuous via the longitudinal folding lines.

13. The extraction bag according to any one of claims 1 to 12, wherein The first member has a reinforcement portion bonded to the bag body on the bottom side of the bag body in the longer region.

14. The extraction bag according to any one of claims 1 to 12, wherein The first member has a reinforcement portion bonded to the bag body on the outer periphery of the long region.

15. The extraction bag according to claim 14, wherein The reinforcement portion extends beyond the upper side to the second member.

16. The extraction bag according to any one of claims 1 to 12, wherein The first member has L-shaped hooking portions protruding on side portions of the pair of long regions.

17. The extraction bag according to claim 13, wherein The first member has L-shaped hooking portions protruding on side portions of the pair of long regions.

18. The extraction bag according to claim 14, wherein The first member has L-shaped hooking portions protruding on side portions of the pair of long regions.

19. The extraction bag according to claim 15, wherein The first member has L-shaped hooking portions protruding on side portions of the pair of long regions.

20. A hand-filled extraction bag, characterized in that: In the extraction bag according to any one of claims 1 to 19, the bag body is not filled with the extraction material, but an opening for filling the extraction material is provided in the bag body.

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