JP7462224B2 - Extraction Bag - Google Patents

Description

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.

Traditionally, tea bags, in which tea leaves are filled into a water-permeable bag with a hanging string, have been widely used to easily brew beverages such as green tea, black tea, and oolong tea. For coffee, in addition to drip-type extraction bags in which hot water is poured onto coffee powder, tea bag-type coffee extraction bags in which the bag, filled with coffee powder, is immersed in hot water are also used.

However, even if you try to immerse a teabag-type coffee extraction bag in hot water, the coffee powder contains carbon dioxide, so the bag body filled with coffee powder tends to float up in the hot water, making it difficult to extract coffee efficiently. Therefore, a proposal has been made to attach the upper side of a hook piece made of a thin plate-like member, which consists of an upper side, a hook piece main body, and a support piece, to one side of the bag body, and to fix the hook piece to the side wall of the cup by bending the support piece from the hook piece main body so that it abuts against the side wall of the cup and contacts it, so that the bag body filled with coffee powder does not float up in the hot water (Patent Document 1).

In addition, in order to make the bag body filled with coffee powder hang down inside the cup, it has been proposed to have a hook member protruding from the top of the bag body and to hook the hook onto the handle of the cup (Patent Document 2).

Registered Utility Model No. 3140084 Registered utility model no. 3205859

However, among conventional coffee extraction bags in which the bag body filled with coffee powder is immersed in hot water, the one in which the support piece bent from the hook piece is butted against the side wall of the cup (Patent Document 1) requires a complicated operation of folding the upper side and the hook piece main body, then folding the hook piece main body and the support piece, and butting the support piece against the side wall of the cup. Furthermore, when setting this extraction bag, the hook piece main body is first hung on the opening wall of the cup so that the hook piece main body and the bag body sandwich the opening wall of the cup. With this method of hanging the hook piece main body on the cup, if the cup is deep and the bag body is not supported by the bottom of the cup, the weight of the extraction bag cannot be supported by the clamping between the hook piece main body and the bag body, and the extraction bag falls into the cup, which may make it impossible to set the extraction bag in its original state.

On the other hand, the conventional extraction bag (Patent Document 2), in which the hook portion is hooked onto the handle of a cup, is difficult to hook onto a cup without a handle. In other words, if the hook portion is hooked onto the edge of the opening of the cup, the hooking is shallow. Moreover, whether the hook portion is hooked onto the handle of the cup or onto the edge of the opening, it is not possible to prevent the bag body from floating up when hot water is poured into the cup, and extraction takes a long time. Furthermore, due to the structure of this extraction bag, it is not possible to inexpensively manufacture the extraction bag industrially using a vertical filling and packaging machine.

In response to this, the present invention aims to provide a tea bag-type extraction bag in which an extract is obtained by immersing a bag body filled with an extraction material such as coffee powder in hot water, which can be set very easily in various cups, shortens the time required for extraction, and can be manufactured industrially at low cost.

The inventors have come up with the idea that by providing a hook member on one side of the bag body of an extraction bag, the hook member having an adhesive part attached to the bag body and a hook part that can be lifted from the bag body, and by making the hook part convex downward so that it can be hooked onto the handle of a cup, the edge of the opening of the cup can be clamped between the adhesive part and the hook part when the extraction bag is set in the cup, so that the extraction bag can be set easily and reliably in various cups regardless of the depth of the cup, and further, by hooking the hook part onto the handle of the cup, the extraction bag can be set in the cup more reliably, and even if hot water is poured into a cup with an extraction bag set in it and the bag body rises up, this rising can be suppressed, and further, clamping the edge of the opening of the cup between the adhesive part and the hook part is effective in both easily setting the extraction bag in a cup without a handle and in suppressing the bag body from rising up, and have completed the present invention.

That is, the present invention provides an extraction bag having a bag body formed from a water-permeable filterable sheet, a hook member formed from a thin plate-like material, and an extraction material filled in the bag body,
The hook member has an adhesive portion provided near the upper side of one surface of the bag body and a hook portion provided so as to be liftable from the bag body,
The hook portion has a downwardly convex shape, one end of which is continuous with the adhesive portion,
The adhesive portion provides an extraction bag having an adhesive region between the adhesive portion and the bag body at least below the continuous portion.

When the extraction bag of the present invention is set in a cup with a handle, the adhesive part and the hook part can easily clamp the edge of the opening of the cup, and the hook part can be hooked onto the handle of the cup. By clamping the edge of the opening, the extraction bag can be set reliably in the cup regardless of the depth of the cup, and it is also possible to prevent the bag body from floating up. In addition, by hooking the hook part onto the handle, the extraction bag can be reliably maintained in the cup even if the bag body floats up, and the highest position at which the bag body floats up can be regulated, so that the bag body is immersed in hot water and the hot water can penetrate into the bag. Therefore, even if the extraction material is coffee powder, which is prone to floating up in hot water, the extraction bag can be maintained in a properly set state in the cup, and an extraction liquid of the desired strength can be quickly obtained.

The above-mentioned effect of clamping the edge of the cup's opening between the adhesive part and the hook part can also be achieved with cups that do not have handles.

In addition, when flake coffee powder is used as the extraction material in the extraction bag of the present invention, the bag body is less likely to float up when hot water is poured into it, compared to when regular coffee powder that has not been processed into flakes is used.

Furthermore, the extraction bag of the present invention can be manufactured industrially and inexpensively using a vertical filling and packaging machine.

FIG. 1 is a plan view of an extraction bag 1A according to an embodiment in an unused state. FIG. 2A is a perspective view illustrating a method of using the extraction bag 1A of the embodiment. FIG. 2B is a perspective view illustrating a method of using the extraction bag 1A of the embodiment. FIG. 2C is a perspective view illustrating a method of using the extraction bag 1A of the embodiment. FIG. 3 is a plan view of the extraction bag manufacturing sheet. FIG. 4 is an explanatory diagram of a method for manufacturing the extraction bag 1A of the embodiment. FIG. 5 is a plan view of the extraction bag 1B of the embodiment in an unused state. FIG. 6 is a perspective view of the extraction bag 1Z in use. FIG. 7 is a plan view of the extraction bag 1C of the embodiment in an unused state. FIG. 8 is a plan view of an unused extraction bag 1D of the embodiment. FIG. 9 is a plan view of an unused extraction bag 1E of the embodiment. FIG. 10 is a plan view of the extraction bag 1F of the embodiment in an unused state. FIG. 11 is a plan view of the extraction bag 1G of the embodiment in an unused state. FIG. 12A is a perspective view of the extraction bag 1G of the embodiment in use. FIG. 12B is a perspective view of the extraction bag 1G of the embodiment in use. FIG. 13 is a plan view of the extraction bag 1H of the embodiment in an unused state. FIG. 14 is a perspective view of the extraction bag 1H of the embodiment in use. FIG. 15 is a plan view of the extraction bag 1I of the embodiment in an unused state. FIG. 16 is a plan view of the extraction bag 1J of the embodiment in an unused state. FIG. 17 is a perspective view of the extraction bag 1J of the embodiment in use. FIG. 18 is a perspective view of the extraction bag 1J of the embodiment in use. FIG. 19A is a plan view of an unused extraction bag 1K of the embodiment. FIG. 19B is a rear view of the extraction bag 1K of the embodiment in an unused state. FIG. 20A is a perspective view of the extraction bag 1K of the embodiment in a used state. FIG. 20B is a perspective view of the extraction bag 1K of the embodiment in use. FIG. 21A is a perspective view of the extraction bag 1K of the embodiment in use. FIG. 21B is a perspective view of the extraction bag 1K of the embodiment in use. FIG. 22 is a plan view of the extraction bag manufacturing sheet.

The present invention will now be described in detail with reference to the drawings. Note that in each drawing, the same reference numerals represent the same or equivalent components.

(overall structure)
FIG. 1 is a plan view of an extraction bag 1A according to an embodiment of the present invention in an unused state.
The extraction bag 1A includes a bag body 3 formed from a water-permeable filter sheet, a hook member 10 formed from a thin plate-like material, and an extraction material filled in the bag body 3. In this embodiment, the bag body 3 is a flat bag and has two opposing sides.

The hook member 10 has an adhesive portion 11 provided near the upper edge 3a of one surface of the bag body 3, and a hook portion 12 that is provided so as to be liftable from the bag body 3. The hook member 10 having the adhesive portion 11 and the hook portion 12 is not provided on the opposite surface of the bag body.

In order to make it possible to manufacture the extraction bag 1A industrially and inexpensively using a filling and packaging machine, in the plan view shown in FIG. 1 in which the hook portion 12 is not raised from the bag body 3, the hook member 10 is provided so as not to overlap the two opposing sides (upper side 3a, lower side 3b) of the bag body 3, nor to overlap the side (side side 3c) sandwiched between the two sides, and is preferably provided within one surface of the bag body 3. This makes it possible to place the extraction bag manufacturing sheet 20 (FIG. 3), in which the hook members 10 are arranged at predetermined intervals on a long water-permeable filterable sheet 21, in a filling and packaging machine, as described below, and perform so-called vertical and horizontal sealing, thereby making it possible to manufacture the extraction bag 1A industrially and inexpensively.

The hook member 10 being provided near the upper side 3a of the bag body 3 means that the distance between the hook member 10 and the upper side 3a of the bag body is shorter than the distance between the hook member 10 and the lower side 3b of the bag body. The hook member 10 may protrude upward from the upper side 3a of the bag body 3.

The adhesive portion 11 is attached to the bag body 3 by heat welding, adhesive, etc. In the present invention, the adhesive region 11m of the adhesive portion 11 with the bag body 3 is at least below the portion where the hook portion 12 is continuous with the adhesive portion 11. In the extraction bag 1A of the embodiment shown in FIG. 1, the hook portion 12 is below the portion where the adhesive portion 11 is continuous with the adhesive portion 11, and the region of about 2/3 from the bottom of the substantially rectangular adhesive portion 11 is the adhesive region 11m, and the upper side is the non-adhesive region 11n. In the present invention, the adhesive region 11m is not limited to the illustrated embodiment as long as it is formed at least below the portion where the hook portion 12 is continuous with the adhesive portion 11. As in the extraction bag 1B shown in FIG. 5, substantially the entire adhesive portion 11 may be attached to the bag body 3. However, when the hook portion 12 is raised to hook the extraction bag 1A to the cup 100 (FIG. 2A), bending stress is concentrated at or near the portion where the hook portion 12 is connected to the adhesive portion 11, forming a fold line, and the force with which the hook portion 12 and the adhesive portion 11 pinch the edge 102 of the opening of the cup 100 is prevented from decreasing. In order to prevent this, it is preferable that the portion where the hook portion 12 is connected to the adhesive portion 11 or near the portion be a non-adhesive region 11n, depending on the stiffness of the hooking member.

On the other hand, in the extraction bag 1A shown in FIG. 1, when the upper half of the adhesive portion 11 is attached to the bag body 3 and the lower half of the adhesive portion 11 is not attached to the bag body 3, as in the extraction bag 1Z shown in FIG. 6, when attempting to hook the hook portion 12 onto the edge 102 of the opening of the cup 100, the lower portion of the adhesive portion 11 will separate from the bag body 3 and the lower portion of the adhesive portion 11 will also hook onto the edge 102 of the opening of the cup 100, raising concerns that the intended hooking state in which the edge 102 of the opening of the cup is sandwiched between the hook portion 12 and the adhesive portion 11 will not be formed.

Furthermore, if the extraction material generates gas, such as coffee powder, even when the hook portion 12 is hooked onto the handle of the cup and the extraction bag 1Z is hung on the cup 100 so that the hook portion 12 and the adhesive area 11m of the upper half of the adhesive portion 11 sandwich the edge 102 of the opening of the cup 100, when hot water is poured, the non-adhesive portion 11n of the adhesive portion 11 separates from the bag body 3, increasing the portion of the bag body 3 that floats above the hot water surface, which may reduce the extraction speed. For this reason, in the present invention, it is preferable that the adhesive area 11m is formed up to the lower end of the adhesive portion 11 so that the floating of the bag body 3 is reduced as much as possible.

In the present invention, the hook portion 12 has a downwardly convex shape (i.e., the curved or bent hook shape protrudes toward the lower side 3b of the bag body 3), and in this embodiment, it has a curved portion 13 that is curved downwardly convex. The ratio D/W of the depth D of the recess 14 formed on the upper side (i.e., the upper side 3a side of the bag body 3) to the width W of the opening 15 of the recess 14 (the length in the width direction of the bag body) is preferably 0.3 or more, and more preferably 0.5 or more, in order to stabilize the hooked state when the curved portion 13 of the hook portion 12 is hooked to the handle of a cup or the edge 102 of the opening of the cup, and to make it difficult for the curved portion 13 to come off the handle of the cup or the edge 102 of the opening due to shaking or the like when carrying the bag in the hooked state (Figure 1).

The specific shape of the hook portion 12, which has a downward convex shape, can be, for example, a J-shape, a C-shape, a 3/4 circle shape, a square L-shape, etc., and as described below, the hook portion may have a cut line or a fold line (Figs. 13 and 15), and may further have any design (Fig. 19A). The extraction bag 1A of this embodiment is J-shaped, and the opening 15 of the recess 14 of the hook portion 12 faces the upper side 3a of the bag body 3.

One end of the hook portion 12 is connected to the attachment portion 11 and is a fixed end, and the other end is a free end. Therefore, the J-shaped hook portion 12 is raised from its lower part.

In this embodiment, as one embodiment in which the attachment area of the attachment part 11 is formed below the continuous part between the hook part 12 and the adhesive part 11, the part of the hook part 12 extending downward from the continuous part with the adhesive part 11 is adjacent to the attachment area 11m of the adhesive part 11 across the cut line L1 (FIG. 1). This makes it possible to pinch the edge 102 of the opening of the cup between the attachment area 11m of the adhesive part 11 and the hook part 12, and to stably hang the extraction bag on the edge 102 of the opening of the cup. In addition, since no fold line is formed in the part where the hook part 12 is continuous with the adhesive part 11 in the bag body width direction, even if the bag body 3 tries to float up due to pouring hot water into the cup in which the extraction bag 1 is set, the hook part 12 and the adhesive part 11 can pinch the edge 102 of the opening of the cup, and the bag body can be prevented from floating up. That is, the surface of the bag body 3 that is attached to the adhesive part 11 in the adhesive region 11m is less likely to separate from the inner wall of the cup, and the bag body 3 is prevented from floating up. On the other hand, if the portion extending downward from the continuous part of the hook part 12 with the adhesive part 11 is not adjacent to the adhesive region 11m of the adhesive part 11 when the hook part 12 is not raised from the bag body 3, or if a fold line is formed in the part where the hook part 12 is continuous with the adhesive part 11 in the bag body width direction, the force with which the hook part 12 and the adhesive part 11 pinch the edge 102 of the opening of the cup is weakened, which is not preferable. Also, if a fold line is formed in the bag body width direction in the part where the hook part 12 is continuous with the adhesive part 11, the bag body 3 is more likely to float up due to the fold line being bent, which is not preferable.

(Extracted materials)
Examples of the brewing material filled into the bag body 3 include coffee powder, tea leaves such as black tea and green tea, herbal medicines, etc. In particular, it is preferable to fill the bag body 3 with flake coffee powder as the coffee powder.

Flake coffee powder is obtained by crushing the cell walls of coffee beans and taking the form of flakes. It can be obtained by passing roasted and ground coffee through the gap between a pair of rolls to process it into flakes. Generally, when coffee powder is filled into the bag body 3 and then immersed in hot water, the bag body tends to float up due to the carbon dioxide contained in the coffee powder. However, when flake coffee powder is used as the coffee powder, the carbon dioxide contained in the roasted and ground coffee is dissipated by the flake processing, so that when hot water is poured over the bag body filled with coffee powder, there are fewer air bubbles generated, and the bag body 3 is less likely to float up in the hot water, making it possible to efficiently extract the extraction material. In addition, flake coffee powder has good liquid drainage, making it easier to process the bag body after removing it from the extraction liquid.

(Bag body)
1 shows a flat bag as the shape of the bag body 3, but in the present invention, the shape of the bag body 3 is not limited to a flat bag. For example, it may be a gusseted bag having a gusset at the bottom or side. The shape of the bag body in a plan view is also not limited to a rectangle, and may be a circle, etc.

The net planar dimensions of the bag body 3 can be set appropriately 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 sized to fit a commercially available coffee cup.

(Water-permeable filter sheet)
As the water-permeable filterable sheet forming the bag body 3, various ones having water permeability and filterability can be used so that they can be used for extracting the extraction material, and the constituent material of the water-permeable filterable sheet can be appropriately selected according to the type of the extraction material. For example, generally, as water-permeable filterable sheets for extracting beverages, woven or nonwoven fabrics made of synthetic fibers such as polyester, nylon, polyethylene, polypropylene, vinylon, etc., semi-synthetic fibers such as rayon, natural fibers such as paper mulberry and mitsumata, mixed paper made of Manila hemp, wood pulp, polypropylene fibers, etc., and papers such as tea bag base paper are known, and these can also be used in the present invention. From the viewpoint of disposal after use of the extraction bag, it is preferable to include biodegradable fibers in the water-permeable filterable sheet. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, and polyethylene succinate. In addition, from the viewpoint of imparting transparency to the water-permeable filterable sheet so that the state of the extraction material in the bag body can be seen, it is preferable to reduce the content of inorganic pigments or to avoid containing inorganic pigments.

In addition, whereas in a drip-type extraction bag, hot water is poured directly onto the brewing material, in the extraction bag of the present invention, hot water is always supplied to the brewing material through a water-permeable filter sheet, so it is preferable to use a water-permeable filter sheet with a coarser mesh than that used in a drip-type extraction bag, provided that there is no leakage of the brewing material powder. For example, when coffee powder is used as the brewing material, the breathability of the water-permeable filter sheet can be 130 to 575 ^cm3 / ^cm2 /sec (JIS L1096 Breathability Method A (method using a Frazier-type breathability tester)).

(Thin plate material)
The hook member 10 can be formed by punching out a thin plate material. The thin plate material is preferably water-resistant, and may be a paperboard or a plastic sheet with a resin laminated surface. From the viewpoint of disposability after use of the extraction bag 1A, it is preferable to use a biodegradable material such as polylactic acid, polybutylene succinate, or polyethylene succinate.

The thin plate material preferably has a high bending rigidity, and is less likely to bend at the portion where the hook portion 12 is connected to the attachment portion 11. Therefore, it is preferable that the rigidity (JIS P 8125) of the thin plate material forming the hanging member 10 is, for example, 5 to 10 mN·m in the vertical direction of the hanging member 10 and 2 to 4 mN·m in the horizontal direction.

(how to use)
The preferred packaging and distribution form of the extraction bag 1A is a state in which the hook member 10 is flattened on the bag body 3 as shown in Fig. 1. As a preferred method for extracting an extraction material from the extraction bag 1A, starting from the extraction bag 1A in this state, the extraction bag 1A is hooked to the cup 100 by hooking the hook portion 12 onto the handle 101 of the cup 100 while the edge 102 of the cup 100 is pinched between the hook portion 12 and the adhesive portion 11 as shown in Fig. 2A. This hooked state is extremely stable regardless of the depth of the cup 100. Next, hot water is poured into the cup 100.

Alternatively, the hook portion 12 may be raised from the bag body 3, the bag body 3 may be placed in a cup filled with hot water, the bag body 3 may be moved up and down in the hot water to allow the hot water to permeate the bag body 3, and then the extraction bag 1A may be hooked to the cup 100 so that the edge 102 of the cup 100 is sandwiched between the hook portion 12 and the adhesive portion 11. At this time, the hook portion 12 may be hooked onto the handle 101 of the cup 100 as necessary.

When the extraction material is coffee powder, as shown in FIG. 2B, when hot water HW accumulates in the cup, the bag body 3 initially tries to rise from the hot water HW, but the degree of the rise is suppressed by the edge 102 of the cup 100 being pinched between the hook portion 12 and the adhesive portion 11, and the maximum height to which the bag body 3 rises is regulated by the hook portion 12 being hooked to the handle 101 of the cup 100. Therefore, the hot water HW penetrates into the bag body 3 more quickly than when the bag body 3 simply rises, and as shown in FIG. 2C, the bag body 3 sinks and is loosely hooked to the handle 101 of the cup 100, and in this state the hooked state of the extraction bag 1A is stable. After the extraction liquid in the cup 100 reaches a predetermined concentration, the extraction bag 3 is pulled up from the hot water HW to complete the extraction. In this way, even if the extraction material is coffee powder, the extraction liquid can be obtained easily and in a short time.

If the cup does not have a handle, the extract can be obtained in the same manner as described above, except that the hook part is not hooked onto the handle of the cup. In order to firmly clamp the edge 102 of the opening of the cup between the hook part 12 and the adhesive part 11, it is preferable that the wall of the opening of the cup is thin.

The method of using the extraction bag of the present invention is not limited to the above-mentioned method. Using the extraction bag of the present invention, an extract can be obtained in various containers, not just a cup, and extraction can be performed using water instead of hot water depending on the extraction material.

(Production method)
3, an extraction bag manufacturing sheet 20 is prepared in which the hanging members 10 are aligned at predetermined intervals and attached to a long water-permeable filterable sheet 21 so that the up-down direction of the hanging members 10 when the extraction bag 1A is in use is aligned with the short direction of the long water-permeable filterable sheet 21. In the figure, the area enclosed by the two-dot chain lines is used to manufacture one extraction bag.

By using this extraction bag manufacturing sheet 20 in a filling and packaging machine, the extraction bags 1A can be continuously manufactured. In this case, as shown in FIG. 4, the extraction bag manufacturing sheet 20 is first folded in half so that both longitudinal sides overlap each other, and the longitudinal sides are welded to form a vertical seal 22 to form a cylindrical body 24. Next, using a vertical filling and packaging machine, the formation of a horizontal seal 23 that welds the cylindrical body 24 in the short direction and the filling of the extraction material into the bag body 3 are alternately repeated to produce a continuous extraction bag in which the extraction bags 1A are connected vertically at the side of the bag body 3 of the extraction bag 1A, and this is cut into individual extraction bags to obtain the extraction bag 1A. Alternatively, the fusion is performed simultaneously when the horizontal seal 23 in the short direction of the cylindrical body is formed, and individually cut extraction bags 1A are continuously manufactured.

(Modifications)
The extraction bag of the present invention may have various modifications. For example, the hook member 10 is provided near the upper side of one surface of the bag body 3, but there is no particular restriction on the installation position in the width direction of the bag body 3. Therefore, for example, as in the extraction bag 1C shown in Fig. 7, the hook part 12 may be provided in the center of the width direction of the bag body 3 relative to the adhesive part 11. As in the extraction bag 1D shown in Fig. 8, the adhesive parts 11a and 11b may be provided on both the left and right sides of the part of the curved part 13 of the hook part 12 that is continuous with the adhesive part 11.

In the extraction bag 1A shown in FIG. 1, the hook portion 12 has a portion formed along one of the left and right side portions 11x of the adhesive portion 11, but as in the extraction bag 1E shown in FIG. 9, both left and right side portions 11x, 11y of the adhesive portion 11 may be sandwiched by the hook portion 12, and the outer side edge 12x of the free end of the hook portion 12 may be aligned with the side edge 11z of the adhesive portion 11.

The extraction bag 1F shown in FIG. 10 is the adhesive bag 1E shown in FIG. 9, with the bottom of the adhesive part 11 and the hook part 12 adjacent to each other, thereby expanding the area of the adhesive region 11m of the adhesive part 11. When the extraction bag 1F is hung on a cup and the bag body 3 is likely to float up when hot water is poured, the expanded area of the adhesive region 11m makes it difficult for the adhesive part 11 to separate from the opening wall of the cup, thereby preventing the bag body 3 from floating up. In addition, by having the bottom of the adhesive part 11 adjacent to the hook part 12, it is possible to reduce the amount of scraps generated when the hanging member 10 is formed by punching a thin plate material.

The extraction bag 1F also has a hole 18 at the upper end of the cut line L1 that separates the hook portion 12 and the adhesive portion 11 on the fixed end side of the hook portion 12. This makes it easy to clamp the edge 102 of the opening of the cup between the adhesive portion 11 and the hook portion 12 even if the opening wall of the cup is thick.

The extraction bag 1G shown in FIG. 11 has separate hook parts 12A, 12B on both the left and right sides of the adhesive part 11, and the curved parts 13A, 13B are adjacent to each other in the vertical direction of the bag body 3. In this way, when the cup to which the extraction bag 1G is hung has a handle, one of the two hook parts 12A, 12B can be appropriately hooked to the handle of the cup so that the hanging state is stable depending on the vertical attachment position of the handle on the cup. For example, as shown in FIG. 12A, only the hook part 12A with the curved part on the upper side can be hooked to the handle 101. Alternatively, when the handle is installed at a low position on the cup, only the hook part 12B with the curved part on the lower side can be hooked to the handle 101 as shown in FIG. 12B. In addition, both hook parts 12A, 12B may be hooked to the handle 101 of the cup 100.

The extraction bag 1H shown in FIG. 13 is an extraction bag 1F shown in FIG. 10 that has a pair of cut lines L2 in the curved portion 13 of the hook portion 12 and a fold line L3 sandwiched between the pair of cut lines L2, thereby forming a foldable area 13x in the upper part of the curved portion 13. This allows the foldable area 13x to be folded, for example, as shown in FIG. 14, depending on the vertical position of the handle on the cup, so that the hook portion 12 can be hooked exactly on the handle 101.

In order to make it possible to fold the upper part of the curved part 13 of the hook part 12 depending on the vertical position of the handle on the cup, as in the extraction bag 1I shown in Figure 15, a vertical cut line L4 may be formed in the center of the width of the upper side of the curved part 13 of the L-shaped hook part 12, and a pair of diagonal fold lines L5 may be formed in a V shape extending from the lower end of the cut line L4 to the upper side, forming a pair of foldable areas 13x on both sides of the cut line L4.

The extraction bag 1J shown in FIG. 16 has a hook portion 12 formed so as to surround the outer periphery of the adhesive portion 11. In this case, the hook portion 12 may be provided along 3/4 or more of the outer periphery of the adhesive portion 11. In addition, a horizontal portion 12h adjacent to the adhesive portion 11 is formed near the fixed end of the hook portion 12 of this extraction bag 1J. Therefore, when using this extraction bag 1J to obtain an extract, if the cup has a handle, the hook portion 12 can be hooked to the handle 101 while the horizontal portion 12h of the hook portion 12 is placed on the edge 102 of the opening of the cup as shown in FIG. 17, so that the edge 102 of the opening of the cup 100 can be clamped between the hook portion 12 and the adhesive portion 11 even if the edge 102 of the opening is thick. Therefore, the state in which the extraction bag 1J is hooked to the cup 100 is stable. Also, even in a cup 100 without a handle, as shown in FIG. 18, the horizontal portion 12h of the hook portion 12 can rest on the edge 102 of the opening of the cup while the hook portion 12 and the adhesive portion 11 can clamp the edge 102 of the opening of the cup, and this clamping can prevent the bag body 3 from floating up when pouring hot water. Note that if the bag body 3 does not rise up in hot water to a low degree depending on the brewing material, or if the bag body 3 does not rise up in hot water, the curved portion 13 of the hook portion 12 can be hooked onto the edge 102 of the opening.

In order to improve the stability of the hooked state when the extraction bag is hooked to the edge 102 of the opening of the cup, as in the extraction bag 1K shown in FIG. 19A, a horizontal portion 12h may be provided near the fixed end of the hook portion 12, and a wide portion 12w may be formed between the fixed end of the hook portion 12 and the curved portion 13, causing the hook portion 12 to protrude toward the attachment portion 11, and a recessed end portion 14a may be formed by causing the recess 14 of the curved portion 13 of the hook portion 12 to bite into the width direction of the bag body.

In addition, in the present invention, when the hook member 10 is provided on one of the two opposing surfaces of the bag body 3, a reinforcing piece formed of a thin plate-like material may be provided on the other surface of the bag body 3. The reinforcing piece preferably extends from the upper side 3a of the bag body toward the lower side 3b, and is preferably continuous with the hook member 10 in terms of manufacturing the extraction bag. There are no particular limitations on the shape of the reinforcing piece, but for example, in the above-mentioned extraction bag 1K, the reinforcing piece 16 can be made in an inverted Y shape as shown in FIG. 19B, and the hook member 10 and the reinforcing piece 16 can be continuous at the upper side 3a of the bag body. By connecting the hook member 10 on one surface of the bag body and the reinforcing piece 16 on the other surface of the bag body at the upper side 3a of the bag body, it is preferable to more effectively suppress the bag body from floating up when pouring hot water. In addition, when pouring hot water to obtain the extract, pouring hot water onto the other side of the bag body 3 using the reinforcing piece 16 as a guide makes it easier to speed up the penetration of the hot water into the bag body 3 compared to simply pouring hot water into a cup, which is also preferable in that it shortens the time required for extraction.

The position where hot water should be poured when pouring can be indicated by embossing 17 on the reinforcing piece 16. Also, the curved portion 13 of the hook portion 12 that is to be hooked onto the handle of a cup can be embossed with a marking indicating that the curved portion 13 is to be hooked onto the handle of a cup. In addition, the thin plate material that forms the adhesive portion 11 and hook portion 12 can be decorated with design elements as long as it does not impair the original function of the extraction bag. For example, in the extraction bag 1K shown in FIG. 19A, the outline of a cat's head is formed by dashed lines 25 on the adhesive portion 11 so that the hook portion 12 around the adhesive portion 11 looks like a cat.

20A is a perspective view of the hook portion 12 of the above-mentioned extraction bag 1K hooked to the handle 101 of the cup as viewed from the attachment portion 11 side, and Fig. 20B is a perspective view of the same state as viewed from the reinforcing piece 16 side. According to this extraction bag 1K, a horizontal portion 12h is formed on the fixed end side of the hook portion 12, so that when the extraction bag 1K is hooked to the cup 100 so that the curved portion 13 is hooked onto the handle 101 while the horizontal portion 12h is placed on the edge 102 of the opening of the cup, the hooked state is stable. In addition, since the recess 14 of the curved portion 13 of the hook portion 12 has a recess end 14a, when the bag body is raised by pouring hot water while the hook portion 12 is hooked to the handle 101 of the cup, the handle 101 of the cup fits into the recess end 14a as shown by the two-dot chain line in Fig. 20A, and the handle 101 is held down by the curved portion 13 (cat-shaped tail) of the hook portion 12 and the wide portion 12w (cat-shaped buttocks) of the hook portion, improving the stability of the hooked state of the extraction bag. In addition, when the extraction bag 1K is hooked to a cup without a handle, as shown in Fig. 21A, the horizontal portion 12h (cat-shaped neck) of the hook portion 12 is placed on the edge 102 of the opening of the cup 100, and the edge 102 of the opening of the cup 100 can be sandwiched between the adhesive portion 11 and the wide portion 12w (cat-shaped buttocks) of the hook portion. Also, as shown in FIG. 21B, the extraction bag 1K can be hooked to the edge 102 of the opening of the cup 100 so that the recessed end 14a of the curved portion 13 rests on the edge 102 of the opening of the cup 100. The hooked state of these extraction bags 1K is also stable.

Figure 22 is a plan view of the extraction bag manufacturing sheet 20 used to manufacture the extraction bag 1K. From this figure, it can be seen that the hook member 10 and the reinforcing piece 16 are continuous on the line that becomes the upper edge 3a of the bag body.

Although various aspects of the present invention have been described above, the modifications in the various aspects of the present invention can be combined as appropriate.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K Extraction bag 3 Bag body 3a Upper side 3b of bag body Lower side 3c of bag body Side 10 of bag body Hooking member 11, 11a, 11b Adhesive portion 11m Adhesive region 11n Non-adhesive region 11x, 11y Side 11z of adhesive portion Side 12, 12A, 12B of adhesive portion Hook portion 12w Wide portion 12x of hook portion Outer side 12h of free end of hook portion Horizontal portion 13, 13A, 13B Curved portion, bent portion 13x Foldable region 14 Recess 14a Recess end 15 Opening 16 Reinforcing piece 17 Embossing 18 Punching hole 20 Extraction bag manufacturing sheet 21 Water-permeable filterable sheet 22 Vertical seal 23 Horizontal seal 24 Cylindrical body 100 Cup 101 Handle 102 Edge of opening L1 Cut line L2 Cut line L3 Fold line L4 Cut line L5 Diagonal fold line A Adhesive area D Depth of recess HW Hot water W Width of opening of recess

Claims (8)

An extraction bag having a bag body formed from a water-permeable filter sheet, a hook member formed from a thin plate-like material, and an extraction material filled in the bag body,
The hook member has an adhesive portion provided near the upper side of one surface of the bag body and a hook portion provided so as to be liftable from the bag body,
The hook portion has a downwardly convex shape, one end of which is a fixed end continuous with the adhesive portion, and the other end is a free end;
The attachment portion has an attachment area between the attachment portion and the bag body at least below the continuous portion, and the attachment area is adjacent to a portion where the hook portion extends downward from the fixed end . 2. The extraction bag according to claim 1, wherein the hook member is provided within the one surface of the bag body. The extraction bag according to claim 1 or 2, wherein the hook portion has a curved portion that is convex downward, and the ratio D/W of the depth D of the recess formed on the upper side of the curved portion to the width W of the opening of the recess is 0.3 or more. The extraction bag according to any one of claims 1 to 3, wherein the hook portion has a portion formed along the side of the adhesive portion. The extraction bag according to claim 4, wherein the hook portion is formed along at least 3/4 of the circumference of the adhesive portion. The extraction bag according to any one of claims 1 to 5, wherein the hook portion has a horizontal portion adjacent to the adhesive portion near the portion continuous with the adhesive portion. An extraction bag according to any one of claims 1 to 6, in which the bag body has opposing surfaces, a reinforcing piece made of a thin plate-like material is provided on the surface opposite the surface on which the hooking member is provided, the reinforcing piece extends from the upper side of the bag body to the lower side, and is continuous with the hooking member at the upper side of the bag body. The extraction bag according to any one of claims 1 to 7, wherein the extraction material is flake coffee powder.

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