Drip bag

Abstract

To provide a drip bag industrially manufactured at a low cost, including an easy-to-tear bag body, and an opening part with a sufficient opening area for pouring hot water, and configured not to be immersed in an extract.SOLUTION: A drip bag 1A includes a bag body 11 formed of a water-permeable filter sheet 10, hook members 20 on a front and back of the bag body 11, and an extraction material filled in the bag body 11. A top side 12 of the bag body 11 is formed of a fold peak of the water-permeable filter sheet and has a lateral easy-to-tear line 2 along the top side 12. The hook members 20 on the front and back of the bag body 11 are formed of a single continuous sheet of thin plate material, and the fold peak 24 and the top side 12 of the bag body 11 overlap each other. The front and back hook members 20 include protrusions 21 formed by a cut 25 extending over the front and back hook members in a development view and alternately protruding from the top side 12 of the bag body 11, a pair of longitudinal cut lines 26x and 26y extending from both ends of the cut 25 toward the bottom side 14 of the bag body, and notches 22 formed on the lower end side of the hook members 20.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a drip bag that can be attached to a container such as a cup to easily drip-drip coffee, black tea, green tea, herbal medicine, or other liquid extracts.

[0002] BACKGROUND ART Disposable drip bags are available in various product forms on the market, with the aim of making it easy to brew a single cup of coffee. The bag body is made of a water-permeable filter sheet and filled with ground coffee. A fastening member made of a thin plate material is attached to the bag body so that the bag body can be fastened to a cup.

[0003] For example, a drip bag has been proposed in which two opposing outer surfaces of the bag (hereinafter referred to as the front and back of the bag) are provided with hooking members with hooking portions that can be lifted from the bag body, the upper edge of the bag body being formed by a fold of a water-permeable filter sheet, with easy-to-tear lines provided on the fold, and upper ends of the hooking members on the front and back of the bag body being provided with protrusions that protrude alternately from the upper edge of the bag body (Patent Document 1).This drip bag can be manufactured industrially and inexpensively using a form-fill-seal machine, and the bag body can be easily opened by pinching and pulling apart the protrusions of the hooking members on the front and back of the bag body. With this drip bag, when the hooking part is hung on a cup and hot water is poured into the opening of the bag body to obtain the extracted liquid, the bag body becomes immersed in the extracted liquid.

[0004] On the other hand, in hand-drip coffee brewing using a conventional paper filter and coffee dripper, the coffee grounds do not soak in the coffee extract when the coffee is extracted. Therefore, some disposable drip bags are designed to prevent the bag body filled with coffee grounds from soaking in the extract. For example, the drip bags described in Patent Documents 2 and 3 have a notch on the lower edge of the hooking member that supports the bag body, and the notch clamps the upper edge of the cup to prevent the bag body from soaking in the extract during brewing (Patent Documents 2 and 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-78748 [Patent Document 2] Japanese Patent Application Publication No. 10-85136 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-262991 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, as shown in FIG. 13, for example, a drip bag 1X is constructed by forming perforations or other easy-to-tear lines along the top edge 12 of a bag body 11 made of a water-permeable filter sheet 10. The bag body 11 is provided with a hanging member 20 made of a thin plate-like material on both sides. The hanging member 20 has protrusions 21a, 21b at its upper end, which protrude alternately from the top edge 12 of the bag body, similar to the protrusions described in Patent Document 1. The lower end of the hanging member 20 has a notch 22. The attachment portion A between the hanging member 20 and the bag body 11 is attached to the upper region of the hanging member 20, closer to the bottom edge 14 of the bag body 11 than the protrusions 21a, 21b, as indicated by the diagonal hatching in the figure. By pulling the protrusions 21a, 21b apart in opposite directions, the top edge 12 of the bag body 11 can be easily torn. Furthermore, by pinching the top edge of the cup, the drip bag can be prevented from being submerged in the extracted liquid.

[0007] However, even if the drip bag 1X is set in a cup by tearing open the top edge 12 of the bag body 11 and pinching the upper edge of the cup with the notch 22, the opening of the opening 15 of the bag body formed by the opposing top edges 12a, 12b of the bag body 11 is small. Therefore, it is difficult to pour hot water into the opening 15. This is because the drip bag 1X is hooked to the cup by pinching the upper edge of the cup with the notch 22 at the lower end of the hooking member 20, and therefore there is no mechanism for pulling the trunk of the bag body 11 in opposite directions, as in the hooking portion described in Patent Document 1.

[0008] Therefore, the object of the present invention is to provide a drip bag that can be produced industrially and inexpensively using a form-fill-seal machine as described in Patent Document 1, in which the bag body is easily torn, the opening of the bag body formed by the torn opening has an opening area large enough for pouring hot water, and the drip bag is not immersed in the extracted liquid. [Means for solving the problem]

[0009] The inventors came up with the idea that by making the hooking members on the front and back of the bag body protrude from the top edge of the bag body, like the protrusions described in Patent Document 1, but limiting the area of the top edge where the bag body splits when the opposing protrusions are pulled apart to only the center rather than the entire top edge, and making the hooking members on the front and back continuous on both sides of the splitting area, and forming a rectangular opening in the hooking members by pulling the opposing protrusions apart and lowering them, it is possible to ensure an opening area at the opening that is sufficient for pouring molten metal, and thus completed the present invention.

[0010] That is, the present invention provides a drip bag having a bag body formed from a water-permeable filter sheet, hook members provided on two opposing outer surfaces of the bag body (hereinafter also referred to as the front and back of the bag body), and an extraction material filled in the bag body, The upper edge of the bag body is formed by a fold of the water-permeable filtering sheet, and the bag body has a lateral easy-to-tear line along the upper edge, and the hooking members on the front and back of the bag body are formed from a single sheet of thin plate-like material, and the fold and the upper edge of the bag body overlap, The hooking members on the front and back of the bag body are formed by cutting the hooking members on the front and back of the bag body in the width direction center of the hooking member in the developed view, and protruding portions protruding alternately from the upper side of the bag body. A pair of vertical cut lines extending from both ends of the cut toward the bottom side of the bag body in the developed view, and A notch formed on the lower edge of the hook member and To provide a drip bag having an adhesive portion between a hook member and a bag body at least at the base of a protrusion. [Effects of the Invention]

[0011] According to the drip bag of the present invention, the top edge of the bag body can be easily torn open by pinching and pulling apart the protruding portions of the hooking members on the front and back sides of the bag body. Furthermore, the hooking members on the front and back sides of the bag body are continuous, and the hooking members have a pair of vertical cut lines extending from both ends of the slits that form the protruding portions toward the bottom edge of the bag body in a developed view. Therefore, after the top edge of the bag body is torn open by pinching and pulling apart the protruding portions, the bag body can be opened along the vertical cut lines by simply pulling down the protruding portions, forming a rectangular opening at the top end of the bag body. This facilitates pouring hot water into the opening.

[0012] In addition, by hanging the drip bag on the upper edge of the cup using the notch at the lower end of the hanging member, it is possible to brew without the bag body being submerged in the brewed liquid.

[0013] Furthermore, this drip bag has the above-mentioned effects and can be produced industrially at low cost using a form-fill-seal packaging machine. [Brief explanation of the drawings]

[0014] [Figure 1A] FIG. 1A is a development view of a drip bag 1A according to an embodiment of the present invention. [Figure 1B] FIG. 1B shows the water-permeable filtering sheet in a development view of the drip bag 1A of the embodiment. [Figure 2] FIG. 2 is a plan view of a drip bag 1A according to an embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view of the drip bag 1A of the embodiment with the upper edge of the bag body torn open. [Figure 4] FIG. 4 is a perspective view of the drip bag 1A of the embodiment with the upper side of the bag body torn open and the notch hung on a cup. [Figure 5] FIG. 5 is a plan view of a drip bag manufacturing sheet used to manufacture the drip bag 1A of the embodiment. [Figure 6]FIG. 6 is an explanatory diagram of a manufacturing method of the drip bag 1A of the embodiment. [Figure 7] FIG. 7 is an explanatory diagram of a manufacturing method of the drip bag 1A of the embodiment. [Figure 8] FIG. 8 is a development view of the drip bag 1B of the embodiment. [Figure 9] FIG. 9 is a development view of a drip bag 1C according to an embodiment of the present invention. [Figure 10] FIG. 10 is a development view of a drip bag 1D according to an embodiment of the present invention. [Figure 11] FIG. 11 is a development view of a drip bag 1E of the embodiment. [Figure 12] FIG. 12 is a development view of the drip bag 1F of the embodiment. [Figure 13] FIG. 13 is a perspective view of a drip bag 1X of a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be described in detail below with reference to the drawings, in which the same reference numerals denote the same or equivalent components.

[0016] (Overall structure of drip bag) FIG. 2 is a plan view of a drip bag 1A according to one embodiment of the present invention. FIG. 1A is a development of the bag body 11 and the hooking member 20 of the drip bag 1A. FIG. 1B is a development of the bag body 11 in the development of FIG. 1A, i.e., a water-permeable filter sheet.

[0017] In the figures, the dotted hatched areas represent the water-permeable filterable sheet 10. In addition, in Figures 1A and 2, the finely diagonally hatched areas represent the bonded portions between the water-permeable filterable sheet 10 and the hooking member 20, and the coarsely diagonally hatched areas represent the bonded portions between the front surface 11x and the back surface 11y of the bag body 11. The finely diagonally hatched and coarsely diagonally hatched areas in the following figures have the same meaning. Note that the bonded portions between the water-permeable filterable sheet 10 and the hooking member 20 are usually not visible from the hooking member side due to the opacity of the thin plate-like material that constitutes the hooking member 20.

[0018] FIG. 3 is a perspective view of the drip bag 1A in a state where the protrusions 21a, 21b of the hooking member 20 are pulled apart in opposite directions to split the upper edge 12 of the bag body 11 along the horizontal easy-tear line. FIG. 4 is a perspective view of the drip bag 1A in a state where the upper edge 101 of the cup 100 is sandwiched between the notched portion 22 of the drip bag 1A after the upper edge 12 of the bag body 11 is split.

[0019] This drip bag 1A has a bag body 11 formed from a water-permeable filter sheet 10, hooking members 20 provided on two opposing outer surfaces (front surface 11x and back surface 11y) of the bag body 11, and an extraction material filled in the bag body 11.

[0020] The extraction material may include coffee powder, tea leaves, or herbal medicine.

[0021] Various types of water-permeable filter sheets can be used, for example, those that can be filled with a predetermined amount of brewing material and allow the brewing material to leach out when hot water is poured into them. Commonly known brewing sheets include woven or nonwoven fabrics made from synthetic fibers such as polyester, nylon, polyethylene, polypropylene, and vinylon; semi-synthetic fibers such as rayon; and natural fibers such as paper mulberry and mitsumata. Mixed paper made from Manila hemp, wood pulp, and polypropylene fibers is also suitable, and paper such as tea bag base paper is also suitable. While these can be used in the present invention, it is preferable to incorporate biodegradable fibers into the water-permeable filter sheet material in order to facilitate disposal of the drip bag after use. Examples of biodegradable fibers include polylactic acid, polybutylene succinate, and polyethylene succinate. Furthermore, in order to provide a suitable steaming effect to the coffee powder during drip brewing, when manufacturing a water-permeable filterable sheet from these fiber materials, it is preferable to adjust the porosity of the fiber layers to create a multi-layer structure with layers that come into direct contact with the coffee powder being "sparse" and layers that do not come into direct contact being "dense," and to increase the hydrophobic fiber content in the layers that come into direct contact with the coffee powder and decrease the hydrophobic fiber content in layers that do not come into direct contact with the coffee powder (Patent No. 3674486).

[0022] The bag body 11 is a flat bag, and the top edge 12 is formed by folding the water-permeable filterable sheet 10, with a horizontal easy-to-tear line 2 formed along the top edge 12 ( FIG. 1B ). The horizontal easy-to-tear line 2 may completely overlap the top edge 12, or may be slightly offset from the top edge 12 and run along the top edge 12. The horizontal easy-to-tear line 2 may be a perforation, or a weakened portion formed in a line on the water-permeable filterable sheet 10 by ultrasonic waves or heat.

[0023] The horizontal easy-tear line 2 is not provided over the entire upper side 12 of the bag body 11, but preferably over the entire area sandwiched between the vertical easy-tear lines 3 on either side of the horizontal easy-tear line 2. The vertical easy-tear line 3 corresponds to the pair of vertical cut lines 26x, 26y of the hanging member. The vertical cut lines 26x, 26y of the hanging member 20 and the vertical easy-tear line 3 of the bag body 11 will be described in detail in the explanation of the configuration around the opening of the bag body 11.

[0024] The hooking members 20 on the front and back of the bag body 11 are formed from a single continuous piece of thin plate-like material. That is, as shown in the developed view of Fig. 1A, the hooking members 20 are formed such that the hooking members 20x on the front surface 11x of the bag body 11 and the hooking members 20y on the back surface 11y are continuous on the upper side 12 of the bag body 11, and the upper side 12 of the bag body 11 and the folds 24 of the thin plate-like material overlap.

[0025] The thin plate-like material is formed from a thin plate-like material such as paperboard or a plastic sheet. From the viewpoint of disposability after use of the drip bag 1A, it is preferable to use a biodegradable material such as polylactic acid, polybutylene succinate, or polyethylene succinate. In particular, the thin plate-like material preferably has a suitable rigidity so that the notch 22 at the lower end of the hooking member 20 can be stably hooked onto the upper edge 101 of the cup 100 as shown in FIG. 4 .

[0026] The hooking member 20 has, at its widthwise center, protrusions 21a and 21b that protrude alternately from the upper side 12 of the bag body 11 (Fig. 2). These two protrusions 21a and 21b are formed simultaneously and without producing scrap by crank-shaped cut 25A in the hooking member 20 (Fig. 1A).

[0027] The hooking members 20 on the front and back of the bag body 11 each have a notch 22 formed at the bottom. The shape of the notch 22 is not particularly limited as long as it allows the drip bag 1A to be set on the cup 100 by clamping the upper edge 101 of the cup 100.

[0028] (Configuration of the bag body around the opening) In the drip bag 1A, the protrusions 21a, 21b of the front and back hooking members 20 of the bag body 11 shown in Fig. 2 are pulled apart as shown in Fig. 3 to tear the lateral tear-open line 2 of the bag body 11. After the lateral tear-open line 2 is torn, the protrusions 21a, 21b are pulled down, and preferably, the space between the fold line 30 and the side edge 29 of the hooking member 20 is pressed with a finger to open the opening 15 at the top end of the bag body 11 with an opening area sufficient for pouring hot water, as shown in Fig. 4. To enable such opening, the front and back hooking members 20 of the bag body 11 are formed from a single continuous thin plate material. The hooking members 20 have a notch 25 at the widthwise center of the hooking member 20, which forms the protrusions 21a, 21b that protrude alternately from the top edge 12 of the bag body 11. As the slit 25, the drip bag 1A of this embodiment is provided with a crank-shaped slit 25A, but the slit 25 is not limited to the crank-shaped slit as in a modified embodiment described later.

[0029] 1A, a pair of vertical cut lines 26x, 26y are formed from both ends of cut 25, extending further toward bag body bottom side 14 than protrusion 21. Here, the starting points of the pair of vertical cut lines 26x, 26y do not have to be strictly at the end points of cut 25, and may be, for example, slightly inside the end points of cut 25 (closer to the center of hooking member 20).

[0030] The longitudinal cut lines 26x, 26y of the hooking members 20x, 20y on the front and back of the bag body 11 are linear cut lines 27 that are continuous in a straight line in the developed view of FIG. 1A.

[0031] Meanwhile, the water-permeable filtering sheet 10 forming the bag body 11 has longitudinal easy-to-tear lines 3 of the same length as the longitudinal cut lines 26x, 26y at positions that exactly overlap with the longitudinal cut lines 26x, 26y of the hanging member 20 (FIG. 1B). This makes it easy to open the bag body 11 along the longitudinal cut lines 26x, 26y of the hanging member 20 by pulling down the protrusions 21a, 21b of the hanging member 20.

[0032] The longitudinal easy-to-tear line 3 of the bag body 11 can be a perforation, a weak part formed in a line using ultrasound or heat, etc., similar to the transverse easy-to-tear line 2 along the top edge of the bag body 11.

[0033] The hooking members 20 on the front and back sides of the bag body 11 preferably have a horizontal fold line 28 extending in the width direction of the bag body 11 between the lower ends 26b, 26b of a pair of vertical cut lines 26x, 26y (i.e., the end closer to the bottom edge 14 of the bag body). The horizontal fold line 28 can be a perforation, a half-cut, a linear weakened portion formed by ultrasonic waves, heat, or the like. In particular, when the protruding portions 21a, 21b of the hooking members 20 are pulled apart to cleave the horizontal easy-to-open line 2 of the bag body 11, and then the protruding portions 21a, 21b are pulled down to open the bag body 11 as shown in FIG. 4, the opening 15 is preferably opened widely and the opening shape is stabilized. Therefore, the horizontal fold line 28 is preferably a perforation formed by a long cut portion extending substantially the entire length of the horizontal fold line 28 and uncut portions at both ends of the cut portion.

[0034] The horizontal fold line 28 may be located between the lower ends 26b, 26b of the pair of vertical cut lines 26x, 26y, and may be oblique to the width direction of the bag body. However, from the viewpoint of facilitating opening and stabilizing the opening shape, it is preferable that the horizontal fold line 28 be a fold line in the width direction of the bag body that connects the pair of lower ends 26b, 26b, as shown in the developed view of FIG. 1A.

[0035] In the development view of Fig. 1A, the area surrounded by the horizontal fold line 28 and the linear cut line 27 becomes the opening 15 when the drip bag 1A is hung on the cup 100 (Fig. 4). The depth L3 (Fig. 4) of the opening 15 in a top view when the drip bag 1A is hung on the cup 100 is equal to or less than twice the distance L2 (Fig. 1A) between the side edge 13 of the bag body 11 and the horizontal fold line 28. Therefore, in order to make the depth L3 of the opening large enough to pour hot water, it is preferable to set the distance L2 to 20 to 40% of the width L1 of the bag body 11.

[0036] Furthermore, width L4 (Fig. 1A) of horizontal fold line 28 is preferably 50 to 60% of width L1 of bag body 11. Distance L5 (Fig. 1A) between horizontal fold line 28 and fold ridge 24 of hooking member 20 is preferably the same as distance L2 between side edge 13 of bag body 11 and horizontal fold line 28. Width L6 of hooking member 20 is preferably 50 to 80% of width L1 of the bag body.

[0037] (Attachment part between the hooking member and the bag body) With regard to the adhesion portion between the hooking member 20 and the bag body 11, it is preferable to form an adhesion portion A1 between the pair of vertical cut lines 26x, 26y and the side edge 29 of the hooking member 20. Furthermore, in the widthwise center of the hooking member 20, the hooking member 20 is attached to the bag body 11 at least at the base of the protrusion 21 (i.e., the portion of the protrusion 21 adjacent to the protrusion 21a on the bottom side of the bag body in the plan view of the drip bag 1A (Fig. 2)). It is also preferable to attach the hooking member 20 to the bag body 11 along the recessed portion of the hooking member 20 formed by the incision 25 (i.e., the portion facing the upper edge 12 or the horizontal easy-tear line 2 of the bag body in the plan view of the drip bag 1A (Fig. 2)). It is also preferable to form an attached portion A4 adjacent to both the top and bottom of the horizontal fold line 28. In the development view of Fig. 1A, the area between the crank-shaped incision 25 and the horizontal fold line 28 may be attached solidly. Furthermore, in the region closer to the bottom side 14 of the bag body than the horizontal fold line 28, it is preferable to provide an attached portion A5 in the center of the hooking member 20, as needed.

[0038] However, if the adhesive portion A1 between the side edge 29 of the hooking member 20 and the vertical cut lines 26x, 26y is located closer to the bottom edge 14 of the bag body 11 than the straight line B connecting the end 12c of the top edge of the bag body 11 and the lower end 26b of the vertical cut line, as shown by the filled-in area with diagonal dashed lines in FIG. 1A, the width of the bag body 11, which determines the depth L3 (FIG. 4), of the opening, is determined by the distance L2' between the adhesive portion A1, which is located closer to the bottom edge 14 of the bag body than the straight line B, and the side edge 13 of the bag body 11. Therefore, the depth L3 of the opening 15 becomes narrower than twice the distance L2 between the side edge 13 of the bag body 11 and the horizontal fold line 28, and the opening area of the opening 15 also becomes narrower accordingly. Therefore, in order to increase the opening area of the opening 15, it is preferable to form the adhesive portion A1 closer to the top edge 12 of the bag body 11 than the straight line B.

[0039] (Pressed-in portion between the linear notch and the side edge of the hooking member) In order to stabilize the opening shape of the opening portion 15, it is preferable to form a pressed-in portion between the vertical cut lines 26x, 26y and the side edge 29 of the hanging member 20. More specifically, in the drip bag 1A of this embodiment, an arc-shaped fold line 30 that intersects the fold ridge 24 of the hanging member 20 is provided between the pair of vertical cut lines 26x, 26y and the side edge 29 of the hanging member 20, and the portion between the fold line 30 and the side edge 29 of the hanging member 20 becomes the pressed-in portion. By pressing the portion between the fold line 30 and the side edge 29 of the hanging member 20, the opening shape of the opening portion 15 of the bag body is stabilized. The folding line 30 may be a perforation, a half cut, or a linear weakened portion formed by ultrasonic waves or heat.

[0040] (How to use) To use the drip bag 1A of this embodiment, first, pinch the protrusions 21a, 21b of the hooking members on the front and back of the bag body 11 and pull them apart in opposite directions. This easily tears open the horizontal easy-to-tear line 2 on the upper side of the bag body 11. Next, pull down the protrusions 21a, 21b to tear open the vertical easy-to-tear line 3 of the bag body 11 along the vertical cut lines 26x, 26y of the hooking members 20. This forms the opening 15 in the bag body 11 (FIG. 3).

[0041] Next, a finger is pressed between the arc-shaped folding line 30 and the side edge 29 of the hooking member 20 to stabilize the opening shape of the opening 15, and the notch 22 at the lower end of the hooking member 20 is hooked onto the upper edge 101 of the cup 100 (FIG. 4). Here, the opening 15 of the bag body 11 is rectangular, and the opening area of the opening 15 is large enough to pour hot water into.

[0042] By pouring hot water into the opening 15, the extract can be obtained in the cup 100 without immersing the bag body 11 in the extract. After obtaining the extract, the drip bag 1A can be discarded by pinching the protruding portion 21 again and pulling it out of the cup 100.

[0043] (Manufacturing method) In order to manufacture the drip bag 1A of this embodiment using a form-fill-seal machine, it is preferable to prepare a roll of a drip-bag manufacturing sheet 40 shown in FIG. 5.

[0044] The drip bag manufacturing sheet 40 is formed by continuously arranging the hooking members 20, each for one drip bag, at predetermined intervals on the water-permeable filtering sheet 10. In the figure, the area between the hooking members 20, each for one drip bag, defined by the two-dot chain line corresponds to the area for one drip bag 1A.

[0045] The drip bag manufacturing sheet 40 is placed in a form-fill-seal machine and its two sides are sealed (vertical sealing) in a conventional manner to form a cylindrical drip bag as shown in FIG. 6. As shown in FIG. 7, the cylindrically sealed drip bag manufacturing sheet 40 is alternately filled with the brewing material and horizontally sealed (horizontal sealing), thereby easily manufacturing a drip bag 1A.

[0046] (Transformation mode) The drip bag of the present invention can be modified in various ways. For example, as shown in the developed view of drip bag 1B in Fig. 8, S-shaped slits 25B may be provided instead of the crank-shaped slits 25A of drip bag 1A shown in Fig. 1A. S-shaped slits 25B are arc-shaped protrusions 21 that protrude alternately from upper side 12 of bag body 11.

[0047] Instead of the crank-shaped notch 25A, a sawtooth-shaped notch 25C may be provided as shown in the developed view of the drip bag 1C in Figure 9. This sawtooth-shaped notch 25C moves the longest protruding portions 21x and 21y of the alternating protruding portions of the front and back fastening members toward the center line L0 of the width of the drip bag 1C.

[0048] As in the drip bag 1D shown in the development view of FIG. 10, both ends of the slit 25C may be positioned on the fold 24 of the hook member 20.

[0049] The drip bag 1A shown in the developed view of FIG. 1A has an arc-shaped fold line 30 between the vertical cut lines 26x, 26y of the hanging member 20 and the side edge 29 of the hanging member 20, while the drip bag 1E shown in the developed view of FIG. 11 may have a mountain-shaped fold line 31.

[0050] As shown in the developed view of the drip bag 1E in FIG. 11, the adhesive portion A1 between the vertical cut lines 26x, 26y of the hanging member 20 and the side edge 29 of the hanging member 20 may be provided only near the fold 24 of the hanging member 20, not near the lower end of the vertical cut lines 26x, 26y.

[0051] The drip bag 1F shown in the development view of Fig. 12 is different from the drip bag 1A shown in the development view of Fig. 1A in that the width L6' of the upper region of the hooking members 20 on the front and back sides of the bag body 11 is wider than the width L6 of the lower ends of the hooking members 20. This widens the gap between the vertical cut lines 26x, 26y of the hooking members 20 and the side edges 29. This makes it easier to push in the arc-shaped fold lines 30.

[0052] In addition, in this drip bag 1F, the adhesive portion A1 between the vertical cut lines 26x, 26y of the hanging member 20 and the side edge 29 of the hanging member 20 is provided only near the fold 24 of the hanging member 20, similar to the drip bag 1E in the developed view shown in Figure 11.

[0053] The configurations of the above-described modified embodiments of the present invention can be combined as appropriate. [Explanation of symbols]

[0054] 1A, 1B, 1C, 1D, 1E, 1F, 1X Drip Bag 2 Lateral easy cleavage line 3 Longitudinal easy-to-tear line 10. Water-permeable filter sheet 11 Bag body 11x, 11y Outer surface of bag body 12, 12a, 12b top edge 12c Top edge 13 side 14 Bottom 15 Opening 20. Hooking member 21, 21a, 21b protrusion 21x, 21y The part of the protrusion with the longest protrusion length 22 Notch 24 Folded Mountain 25 Cutting 25A crank type cutting 25B S-shaped cut 25C sawtooth type cut 26, 26x, 26y longitudinal cut lines 26b Bottom end of vertical cut line 27 Straight cut line 28 Horizontal broken line 29 side 30 Arc-shaped broken line 31 Mountain-shaped line 40 Drip bag manufacturing sheet 100 cups 101 upper edge A, A1, A2, A3, A4, A5: The attachment part between the hooking member and the bag body B: A straight line connecting the top edge of the bag body and the bottom edge of the vertical cut line of the hooking member L0: Center line of drip bag width L1 Width of bag body L2: Distance between the side of the bag body and the horizontal fold line L3 Opening depth L4 Width of horizontal broken line L5 Distance between horizontal fold line and fold of hanging member L6 Width of the hook

Claims

1. A drip bag includes a bag body formed from a water-permeable filter sheet, hook members provided on two opposing outer surfaces of the bag body (hereinafter also referred to as the front and back of the bag body), and an extraction material filled in the bag body, The upper edge of the bag body is formed by a fold of the water-permeable filtering sheet, and the bag body has a lateral easy-to-tear line along the upper edge, and the hooking members on the front and back of the bag body are formed from a single sheet of thin plate-like material, and the fold and the upper edge of the bag body overlap, The hooking members on the front and back of the bag body are formed by cutting the hooking members on the front and back of the bag body in the width direction center of the hooking member in the developed view, and protruding portions protruding alternately from the upper side of the bag body. A pair of vertical cut lines extending from both ends of the cut toward the bottom side of the bag body in the developed view, and A notch formed on the lower edge of the hook member and A drip bag having an adhesive portion between the hooking member and the bag body at least at the base of the protrusion.

2. 2. The drip bag according to claim 1, wherein the hooking member has a horizontal fold line between the lower ends of the pair of vertical cut lines.

3. 3. The drip bag according to claim 1, wherein the bag body has a longitudinal easy-to-tear line formed thereon that overlaps with the longitudinal cut line of the hooking member.

4. 3. The drip bag according to claim 1, wherein the adhesive portion between the hooking member and the bag body is located along the recess of the hooking member formed by the cutout.

5. 3. The drip bag according to claim 2, wherein the attachment portion between the hooking member and the bag body is located along the horizontal fold line.

6. 3. The drip bag according to claim 1, wherein, in the developed view, an arc-shaped fold line intersecting the fold of the hanging member is formed between the vertical cut line of the hanging member and the side edge of the hanging member.

7. 3. The drip bag according to claim 1, wherein the distance between the side edge of the bag body and the lower end of the longitudinal cut line is 20% to 40% of the width of the bag body.

8. 3. The drip bag according to claim 1, wherein the adhesive portion between the hanging member and the bag body is closer to the upper side of the bag body than the straight line connecting the end of the upper side of the bag body and the lower end of the vertical cut line, between the side edge of the hanging member and the vertical cut line.

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