Coffee brewing bag structure

Abstract

To provide a coffee extraction bag structure in which the bottom of a filter bag is kept untouched by a liquid in a cup and remains held above the rim of a cup.SOLUTION: A coffee extraction bag includes: a filter bag 200 which is made of a filter sheet and provided with filter holes; and a hook part 300 which has a support part 310 and a cross-frame part 320. The support part is connected to the filter bag and provided with an opening support sheet. The cross-frame part is provided with a connection part and a protrusion part 324, and is connected to the support part through the connection part. The hook part includes a plurality of press folding lines that are provided in the opening support sheet and the connection part, and also includes a cutting line that is provided in the border of the cross-frame part. The hook part is composed of the same material as the filter bag. The bottom of the filter bag is untouched by the liquid of the cup and held above the rim of the cup, when the hook part is stretched over the rim of the cup.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an ear-hook type coffee brewing bag structure. [Background technology]

[0002] The ear-hook type coffee brewing bag structure mainly contains ground coffee powder in a filter bag, and the user can conveniently brew a cup of coffee by opening the package, hanging the ear-hook type coffee brewing bag structure over a cup, and then pouring in an appropriate amount of hot water. Extraction type coffee allows the user to enjoy not only the convenience of instant coffee, but also the high quality and ritual of hand drip coffee.

[0003] In the conventional ear-hook type coffee extraction bag structure, the filter bag part is made of a plastic material and the ear hook part is made of paper. Therefore, it is necessary to use an adhesive to join the filter bag part and the ear hook part. Furthermore, in order to maintain the strength of the ear hook part when exposed to water, it is necessary to apply a wet paper strength enhancer to the surface of the paper ear hook part. Both the adhesive and the wet paper strength enhancer may be released into the extraction liquid when water is added for extraction. Furthermore, since the filter bag part and the ear hook part are made of different materials, they cannot be collected when the used extraction bag is discarded.

[0004] In the conventional ear-hook type coffee brewing bag structure, the ear hook is hung on the edge of the cup, and the bottom of the filter bag is lower than the edge of the cup. When a lot of water is added, the bottom of the filter bag will contact the liquid surface, which will affect the flavor of the brewed coffee. Summary of the Invention

[0005] The object of the present invention is to provide a coffee extraction bag structure in which the filter bag and the ear hook are made of the same material, and when the ear hook is suspended above the edge of the cup, the bottom of the filter bag does not come into contact with the liquid in the cup, but is still held above the edge of the cup.

[0006] One embodiment of the present invention includes a filter bag made of a filter sheet and having a plurality of filter holes, and an ear hook portion, each of which is joined to the filter bag, and has an opening support sheet, a bottom support sheet, a central support sheet, and two side support sheets, and the central support sheet and the side support sheet have a support portion that connects the opening support sheet and the bottom support sheet, and two cross frames located on both the left and right sides of the ear hook portion, each having a connecting portion and a convex portion, connected to each of the side support sheets via the connecting portions, and forming a convex portion toward the bottom support sheet on the side closer to the central support sheet. the filter bag and the ear hooks are made of the same material, which may include polyethylene, polypropylene, polyester, polyamide, polyurethane, methyl methacrylate, or a copolymer or polymer blend of any two of them, and a plurality of pressing fold lines arranged vertically on the opening support sheet and diagonally on the connection portion, extending to the side support sheet, and a plurality of cutting lines located at the boundaries of the cross frame portion and arranged to separate the cross frame portion from the opening support sheet, the bottom support sheet, and the central support sheet.

[0007] In some embodiments, the filter bag is made of a non-woven or woven sheet of material produced by a meltblown process.

[0008] In some embodiments, the material of the ear loop is a plastic sheet produced by a foaming process, a rolled film, a woven sheet, or a non-woven sheet.

[0009] In some embodiments, the ear loops are foam plastic sheets, rolled films, woven sheets, or non-woven sheets with shape memory or elastic recovery.

[0010] In some embodiments, the filter bag and ear pieces are joined by an ultrasonic welding or hot welding process.

[0011] One embodiment of the present invention is a filter bag made of a filter sheet, the filter bag having an opening located at the top of the filter bag, a plurality of bag walls located on the sides of the filter bag, a bag-shaped bottom located at the bottom of the filter bag, a storage chamber defined by the bag walls and the bag-shaped bottom together after the filter bag is expanded and communicating with the opening, and a plurality of filter holes located in each of the bag walls and the bag-shaped bottom, and an ear hook portion, the ear hook portion being joined to each of the bag walls of the filter bag, and having an opening support sheet, a bottom support sheet, a central support sheet, and two side support sheets. a central support sheet and a side edge support sheet including a support section connecting the opening support sheet and the bottom support sheet, and two cross frame sections located on the left and right sides of the ear loop section, each having a connection section and a protrusion, connected to each of the side edge support sheets via the connection section and forming a protrusion toward the bottom support sheet on the side closer to the central support sheet, each of the cross frame sections being open to the left and right sides and arranged to be separated from the bag wall of the filter bag, and the filter bag and the ear loop section being made of the same material including polyethylene or polypropylene. The connection process of each member is ultrasonic and hot pressure welding.

[0012] In some embodiments, each of the bag walls are both rectangular, forming a square bag bottom.

[0013] In some embodiments, each of the bag walls are pentagonal in shape and form a tapered bag bottom, forming a funnel shape.

[0014] In some embodiments, after the ear loops are folded to expand the filter bag chamber, the opening support sheet maintains the shape of the opening along the opening, and the bottom support sheet maintains the shape of the bag-shaped bottom along the bag-shaped bottom.

[0015] In some embodiments, the filter bag is a bifold filter sheet. [Brief description of the drawings]

[0016] For a clear understanding of the invention, the following embodiments should be read in conjunction with the drawings. [Figure 1] 1 is a plan view of a coffee extraction bag structure according to an embodiment of the present invention before opening; FIG. [Diagram 2] FIG. 2 is a perspective view of a coffee brewing bag structure according to an embodiment of the present invention after being unfolded. [Diagram 3] FIG. 2 is an explanatory diagram of the use of a coffee brewing bag structure in one embodiment of the present invention. [Figure 4] FIG. 2 is an explanatory diagram of the use of a coffee brewing bag structure in one embodiment of the present invention. [Diagram 5] FIG. 2 is an explanatory diagram of the use of a coffee brewing bag structure in one embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of a sheet for manufacturing a coffee extraction bag structure in one embodiment of the present invention. [Figure 7] 1 is an explanatory diagram of a method for manufacturing a coffee extraction bag structure according to an embodiment of the present invention. [Figure 8] FIG. 2 is a plan view of a coffee brewing bag structure according to another embodiment of the present invention before opening. [Figure 9] FIG. 2 is an explanatory diagram of the use of a coffee brewing bag structure in another embodiment of the present invention. [Figure 10] FIG. 2 is a plan view of a sheet for manufacturing a coffee brewing bag structure in a further embodiment of the present invention. [Figure 11] FIG. 13 is an illustration of the use of a coffee brewing bag structure in a further embodiment of the present invention. [Figure 12] FIG. 2 is a plan view of a coffee brewing bag structure before opening in a further embodiment of the present invention; [Figure 13] FIG. 13 is an illustration of the use of a coffee brewing bag structure in a further embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, coffee extraction bag structures according to several embodiments of the present invention will be described, and the same parts will be described with the same reference numerals.

[0018] The terms "upper," "lower," "left," "right," and "side" used to describe the names of elements in this specification are intended to describe the relative positions of each component and are not intended to limit the scope of the present invention.

[0019] FIG. 1 is a plan view of a coffee extraction bag structure 100 in one embodiment of the present invention before opening. As shown in FIG. 1, the coffee extraction bag structure 100 includes a filter bag 200 and an ear hook 300. The filter bag 200 is made of a filter sheet 202 and has a plurality of filter holes 250. The filter sheet 202 can be a nonwoven fabric manufactured from plastic base particles through a melt blowing process. In this embodiment, the material of the plastic base particles can be polyethylene, polypropylene, polyester, polyamide, polyurethane, methyl methacrylate, or a copolymer or polymer blend consisting of any two selected from them.

[0020] The ear hook portion 300 is formed from a plastic sheet through a pressing process. This plastic sheet is a plastic sheet manufactured by a foaming process of plastic base particles. In this embodiment, the material of the plastic base particles is polyethylene, polypropylene, polyester, polyamide, polyurethane, methyl methacrylate, or a copolymer or polymer blend consisting of any two selected from them. The ear hook portion 300 may be a rolled film, a woven sheet, or a nonwoven sheet. The ear hook portion 300 is a plastic sheet, a rolled film, a woven sheet, or a nonwoven sheet, and since the support strength is not affected even when exposed to water, there is no need to apply a wet strength enhancer to the surface of the ear hook portion 300.

[0021] In this embodiment, the filter bag 200 and the ear hooks 300 are made of the same material. That is, when the filter bag 200 is made of a nonwoven fabric using polyethylene, a polyethylene plastic sheet, rolled film, woven fabric sheet, or nonwoven fabric sheet is used for the ear hooks 300. Since the filter bag 200 and the ear hooks 300 are made of the same material, they can be easily collected when disposing of the used coffee extraction bag.

[0022] As shown in FIG. 1, one ear hook portion 300 located on one side of the filter bag 200 includes a support portion 310, two cross frame portions 320, a plurality of pressure fold lines 330-1, 330-2, 330-3, and a plurality of cutting lines 340.

[0023] The support part 310 has an opening support sheet 312, a bottom support sheet 314, a center support sheet 316, and side support sheets 318 located on both the left and right sides. The center support sheet 316 and the side support sheets 318 on both sides connect the opening support sheet 312 and the bottom support sheet 314. Since the filter bag 200 and the ear hook part 300 are made of the same material, there is no need to use an adhesive when joining the filter bag 200 and the ear hook part 300, and the support part 310 and the filter bag 200 can be joined by ultrasonic welding or hot welding process.

[0024] Two cross frame portions 320 are located on both the left and right sides of the ear hook portion 300. Each of the cross frame portions 320 has a connecting portion 322 and a protruding portion 324. Each of the cross frame portions 320 is connected to one of the side support sheets 318 via the connecting portion 322. Each of the cross frame portions 320 forms a protruding portion 324 toward the bottom support sheet 314 on the side closer to the central support sheet 316.

[0025] A vertical pressure fold line 330-1 is provided in the center of the opening support sheet 312. Vertical pressure fold lines 330-2 shorter than the pressure fold line 330-1 are provided on both the left and right sides of the opening support sheet 312. A diagonal pressure fold line 330-3 is provided in each of the connecting portions 322, extending to the side edge support sheet 318. The pressure fold lines 330-1, 330-2, and 330-3 are used to guide the opening support sheet 312 and the connecting portions 322 so that they are folded into a desired shape.

[0026] Cut lines 340 are provided on the cross frame portion 320 immediately at the boundaries of the open support sheet 312, the bottom support sheet 314, and the central support sheet 316. The cut lines 340 are provided to separate the cross frame portion 320 from the open support sheet 312, the bottom support sheet 314, and the central support sheet 316. When ultrasonic welding is performed, only the support portion 310 and the filter bag 200 are joined, so the cross frame portion 320 may also be separated from the filter bag 200.

[0027] A tear line 260 is provided on the side of the filter bag 200 close to the open support sheet 312. The tear line 260 is normally closed to prevent the coffee grounds from spilling out, and can be easily torn when in use.

[0028] Fig. 2 is a perspective view of the coffee brewing bag structure 100 in one embodiment of the present invention after unfolding. As shown in Fig. 2, the filter bag 200 after unfolding has an opening 210, a bag wall 220, a bag-shaped bottom 230, a receiving chamber 240, and a number of filtering holes 250. The opening 210 is located at the upper part of the filter bag 200. The receiving chamber 240 is jointly defined by the bag wall 220 and the bag-shaped bottom 230, and the opening 210 communicates with the receiving chamber 240. In this embodiment, the bag wall 220 is rectangular, forming a square bag-shaped bottom 230.

[0029] The support part 310 is bonded to the bag wall 220 and is used to support and maintain the shape of the filter bag 200. Because the ear hook part 300 is made of a plastic sheet having shape memory properties, after the filter bag 200 is unfolded, the opening support sheet 312 provided along the opening 210 can maintain the unfolded state of the opening 210, while the bottom support sheet 314 provided along the bag-shaped bottom 230 can maintain the unfolded state of the bag-shaped bottom 230. The center support sheet 316 and the side support sheets 318 are used to support and connect the opening support sheet 312 and the bottom support sheet 314.

[0030] The cross frame portions 320 are located on both the left and right sides of the ear hook portion 300. Taking the left cross frame portion 320 as an example, the cross frame portion 320 is connected to the left side edge support sheet 318 via a connecting portion 322. After the left cross frame portion 320 is folded along the pressing fold line 330-3 of the left connecting portion 322, the left cross frame portion 320 can be unfolded to the left and separated from the bag wall 220. The right cross frame portion 320 can be unfolded to the right and separated from the bag wall 220.

[0031] In this embodiment, the plastic sheet for making the ear hook portion 300 may have shape memory properties. In this way, the opening 210 of the filter bag 200 can be expanded by folding the opening support sheet 312 along the pressing fold lines 330-1, 330-2, and 330-3, and the cross frame portion 320 can be expanded by folding the connection portion 322. Moreover, the portions folded along these pressing fold lines 330-1, 330-2, and 330-3 can maintain the folded shape.

[0032] 3 to 5 are explanatory diagrams of the use of the coffee extraction bag structure 100 in one embodiment of the present invention. When using the coffee extraction bag structure 100, first tear the opening line 260, and as shown in FIG. 3, pinch the side edge support sheets 318 on both sides with your fingers and press both sides toward the center of the filter bag 200 as appropriate. The filter bag 200 can be unfolded by the guide of the pressing fold lines 330-1 and 330-2, and the cross frame part 320 can be unfolded by the guide of the pressing fold line 330-3. As shown in FIG. 4, the degree of unfolding of the cross frame part 320 is adjusted according to the size of the cup mouth, and the coffee extraction bag structure 100 is bridged over the edge part 400 of the cup as shown in FIG. 5. Next, water is added into the filter bag 200 from the opening 210, so that the extraction material, such as coffee, filled in the storage chamber 240 can be poured in.

[0033] 5, the side of the convex portion 324 of the cross frame portion 320 away from the central support sheet 316 is used to hang on the outside of the brim 400 of the cup, so that the coffee extraction bag structure 100 can be bridged over the brim 400 of the cup. In this way, even if a lot of water is poured and the liquid level is brought close to the brim 400 of the cup, the bag-shaped bottom 230 will not come into contact with the liquid level because it is higher than the brim 400 of the cup.

[0034] Fig. 6 is a plan view of a sheet for manufacturing the coffee extraction bag structure 100 in one embodiment of the present invention. Fig. 7 is an explanatory diagram of a manufacturing method of the coffee extraction bag structure 100 in one embodiment of the present invention.

[0035] 6, the coffee extraction bag structure 100 mainly includes a filter bag 202 and an ear hook 300. First, the ear hooks 300 are arranged facing each other with a gap on the bottom support sheet 314 side, and a pair of ear hooks 300 with opposing bottoms are arranged with a gap on the long filter sheet 202. The filter sheet 202 and the support part 310 of the ear hook 300 are joined by ultrasonic welding.

[0036] 7, the long sides of the filter sheet 202 are overlapped and folded in half. A tear line 260 is provided on the side of the filter sheet 202 closer to the opening support sheet 312. By repeatedly welding and cutting in the short direction of the filter sheet 202 at intervals of the width d of the filter bag 200 and filling one bag's worth of extraction material such as coffee powder between the intervals, the coffee extraction bag structure 100 in one embodiment of the present invention can be obtained.

[0037] As described above, the filter bag 200 of the coffee extraction bag structure 100 in one embodiment of the present invention is formed by folding the filter sheet 202 in half, and the filter bag 200 has no other folding structure. Therefore, by making the ear hooks 300 using a foamed plastic sheet having shape memory properties, the shapes of the opening 210 and the storage chamber 240 after the filter bag 200 is deployed can be effectively maintained.

[0038] Fig. 8 is a plan view of a coffee brewing bag structure 100B in another embodiment of the present invention before opening. As shown in Fig. 8, the bag wall 220B of the coffee brewing bag structure 100B is pentagonal and forms a tapered bag-shaped bottom 230B. In this embodiment, the pressure fold lines 330B-1, 330B-2, and 330B-3 are vertical, and the pressure fold line 330B-4 is diagonal.

[0039] Fig. 9 is a schematic diagram of a coffee brewing bag structure 100B according to another embodiment of the present invention. As shown in Fig. 9, after the coffee brewing bag structure 100B is hung over the edge 400 of a cup via the cross frame part 320B, the pentagonal bag wall 220B allows coffee to permeate and filter out from the tip where the two sides of the tapered bag-shaped bottom part 230B intersect. Since the bottom area of ​​the bag-shaped bottom part 230B is smaller than the top, the coffee liquid falls quickly into the cup when poured, shortening the time that the hot water contacts the ground coffee powder, achieving the purpose of quickly extracting coffee in a short time, and the coffee has a more refreshing taste.

[0040] Fig. 10 is a plan view of a sheet for manufacturing a coffee extraction bag structure 100C in one embodiment of the present invention. As shown in Fig. 10, a plurality of rib-shaped bottom support sheets 314C-1 and a plurality of cavities 314C-2 are formed in the center of the support part 310C of the ear hook part 300C on the filter sheet 202C, that is, between a pair of cross frame parts 320C and another pair of cross frame parts 320C. When the plastic sheet from which the ear hook part 300C is made is subjected to a pressing process, the plastic sheet of the cavities 314C-2 is removed, and the cavities 314C-2 are formed. Furthermore, the support part 310C and the filter sheet 202C are joined by ultrasonic welding.

[0041] FIG. 11 is an explanatory diagram of the use of the coffee extraction bag structure 100C in one embodiment of the present invention. As shown in FIG. 11, after the coffee extraction bag structure 100C is hung over the rim 400 of the cup via the cross frame portion 320C, coffee can be filtered out through the cavity 314C-2 of the ribbed bottom support sheet 314C-1 on the bag-shaped bottom 230C. Since the coffee powder at the corners of the square bag-shaped bottom 230C is often not fully submerged, the water flow can be uniformly guided to the entire bag-shaped bottom 230C through the cavity 314C-2 formed by the ribbed bottom support sheet 314C-1, so that the coffee powder at the corners can be fully submerged. In addition, the ribbed bottom support sheet 314C-1 can provide support to the bag-shaped bottom 230C and maintain the expanded shape of the bag-shaped bottom 230C.

[0042] FIG. 12 is a plan view of a coffee brewing bag structure 100D according to a further embodiment of the present invention before opening. As shown in FIG. 12, the cross frame portion 320D-1 is located on both the left and right sides of the ear hook portion 300D. The support portion 310D is provided with pressing fold lines 330D-1, 330D-2, and 330D-3. Taking the left cross frame portion 320D-1 as an example, the cross frame portion 320D-1 is connected to the central support sheet 316D via the connection portion 322D. After folding the left cross frame portion 320D-1 along the pressing line 330D-3 of the left connection portion 322D, the left cross frame portion 320D-1 can be deployed to the right and separated from the bag wall 220D. That is, the cross frame portions 320D-1 on both the left and right sides can be deployed toward the central support sheet 316D.

[0043] As shown in Fig. 12, a cavity 320D-2 may be formed in the cross frame portion 320D as necessary. When the plastic sheet from which the ear hook portion 300D is made is subjected to a pressing process, the plastic sheet of the cavity 320D-2 is removed to form the cavity 320D-2. Furthermore, the support portion 310D and the filter bag 200 are joined by ultrasonic welding. The cavity 320D-2 in the cross frame portion 320D can reduce the weight of the processed coffee extraction bag structure 100D.

[0044] Fig. 13 is an explanatory diagram of the use of the coffee brewing bag structure 100D in a further embodiment of the present invention. As shown in Fig. 13, the coffee brewing bag structure 100D can be stretched through the bag-shaped bottom 230D after hanging the coffee brewing bag structure 100D over the rim 400 of the cup via the cross frame portion 320D-1. In this embodiment, the cross frame portions 320D-1 on both sides are deployed toward the center support sheet 316D, and the wide center support sheet 316D blocks the water filtered out from the center of the bag wall 220D, so that the water flow is guided to flow out to both sides, and the coffee grounds on both sides can be fully submerged. The center support sheet 316D can also provide vertical support to the bag wall 220D.

[0045] As described above, in the coffee extraction bag structure provided by some embodiments of the present invention, the filter bag and the ear hooks are made of the same material, so that the filter bag and the ear hooks can be joined by ultrasonic welding or hot pressure welding process, and the filter bag and the ear hooks can be joined without using adhesive materials such as spray glue or applying adhesive materials by lamination. In addition, the ear hooks are made of a plastic sheet, and there is no need to apply a wet strength agent to the surface. In the coffee extraction bag structure in some embodiments of the present invention, adhesive and wet strength agent are not released into the coffee during use, and the bag is easy to collect after use. In addition, the ear hooks of the coffee extraction bag structure provided by some embodiments of the present invention are hung over the edge of the cup, so that the bag-shaped bottom is not lower than the edge of the cup and does not contact the liquid surface during use. [Explanation of symbols]

[0046] 100, 100B, 100C, 100D Coffee Extraction Bag Structure 200 filter bags 202, 202C Filtration sheet 210 Aperture 220, 220B, 220D bag wall 230, 230B, 230D bag bottom 240 Containment Room 250 filter holes 260 Opening Line 300, 300C, 300D Ear hook 310, 310C support part 312 Opening support sheet 314 Bottom support sheet 314C-1 Ribbed bottom support sheet 314C-2 Cavity 316, 316D Center support sheet 318 Side support sheet 320, 320B, 320C, 320D-1 Cross frame section 320D-2 Cavity 322, 322D Connection 324 Convex 330-1, 330-2, 330-3, 330B-1, 330B-2, 330B-3, 330B-4, 330D-1, 330D-2, 330D-3 Presser fold lines 340 Cutting wire 400 Cup Rim d width

Claims

1. A filter bag made of a filter sheet and having a plurality of filter holes; A plurality of ear hooks; Including, Each of the ear hooks is a support section that is joined to the filter bag and has an opening support sheet, a bottom support sheet, a central support sheet, and two side support sheets, the central support sheet and the multiple side support sheets connecting the opening support sheet and the bottom support sheet; two cross frame sections that are located on both the left and right sides of the ear hook section, each having a connection section and a protrusion, and are connected to each of the side support sheets via the connection sections, forming the protrusion toward the bottom support sheet on the side closer to the central support sheet, and having a cavity in the center; a plurality of pressing fold lines that are provided vertically on the opening support sheet and extend obliquely to the multiple connection sections to the multiple side support sheets; and a plurality of cutting lines that are located at the boundaries of the multiple cross frame sections and are provided to separate the multiple cross frame sections from the opening support sheet, the bottom support sheet, and the multiple central support sheets. A coffee extraction bag structure in which the filter bag and the plurality of ear loops are made of the same material, including polyethylene, polypropylene, polyester, polyamide, polyurethane, methyl methacrylate, or a copolymer or polymer blend consisting of any two selected from the above.

2. 2. The coffee extraction bag structure according to claim 1, wherein the filter bag is made of a non-woven or woven fabric sheet produced by a melt-blown process.

3. 2. The coffee extraction bag structure according to claim 1, wherein the material of the plurality of ear loops is a plastic sheet, a rolled film, a woven fabric sheet, or a nonwoven fabric sheet manufactured by a foam molding process.

4. 2. The coffee extraction bag structure according to claim 1, wherein the ear loops are made of a foamed plastic sheet, a rolled film, a woven fabric sheet or a nonwoven fabric sheet having a shape memory function or elastic recovery function.

5. 2. The coffee brewing bag structure according to claim 1, wherein the filter bag and the ear pieces are joined by ultrasonic welding or hot welding process.

6. A filter bag made of a filter sheet, the filter bag having an opening located at an upper portion of the filter bag, a plurality of bag walls located at a side surface of the filter bag, a bag-shaped bottom located at a lower portion of the filter bag, a storage chamber defined by the plurality of bag walls and the bag-shaped bottom after the filter bag is expanded and communicating with the opening, and a plurality of filter holes located in each of the bag walls and the bag-shaped bottom; A plurality of ear hooks; Including, Each of the ear hooks is joined to each of the bag walls of the filter bag, and has an opening support sheet, a bottom support sheet, a central support sheet, and two side support sheets, and includes a support portion where the central support sheet and the multiple side support sheets connect the opening support sheet and the bottom support sheet, and two cross frame portions located on both the left and right sides of the ear hooks, each having a connection portion and a protrusion portion, connected to each of the side support sheets via the connection portions, forming the protrusion toward the bottom support sheet on the side closer to the central support sheet, and having a cavity in the center, The cross frame portions are each open to both the left and right sides and are provided so as to be separated from the bag wall of the filter bag, A coffee extraction bag structure in which the filter bag and the plurality of ear loops are made of the same material, including polyethylene, polypropylene, polyester, polyamide, polyurethane, methyl methacrylate, or a copolymer or polymer blend consisting of any two selected from the above.

7. 7. The coffee brewing bag structure according to claim 6, wherein each of said bag walls is rectangular to define said square bag bottom.

8. 7. The coffee brewing bag structure of claim 6, wherein each of said bag walls is pentagonal and forms said tapered bag bottom, forming a funnel shape.

9. 7. The coffee extraction bag structure according to claim 6, wherein after the ear loops are folded to expand the storage chamber of the filter bag, the opening support sheet maintains the shape of the opening along the opening, and the bottom support sheet maintains the shape of the bag-shaped bottom along the bag-shaped bottom.

10. 7. The coffee extraction bag structure according to claim 6, wherein the filter bag is formed by folding the filter sheet in half.

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