Coffee filter and method of making the same

Abstract

To provide a simple-structured, easy-to-use coffee filter.SOLUTION: There is provided a coffee filter in which are formed a first fold line connecting a midpoint of the first side and a midpoint of the fourth side of a rectangular filter body made of a single sheet of paper or nonwoven fabric having a first side, a second side, a third side, and a fourth side; a second fold line connecting the midpoint of the second side and the midpoint of the third side; a third fold line connecting the midpoint of the first side and the midpoint of the second side; a fourth fold line connecting the midpoint of the third side and the midpoint of the fourth side; and a fifth fold line connecting an apex formed by the first side and the fourth side and an apex formed by the second side and the third side; and in which are function, as fine particle housing parts, a first piece bounded by the first side, the third side, the third fold line and the fourth fold line; a second piece bounded by the second side, the fourth side, the third fold line and the fourth fold line; a third piece B bounded by the first fold line, the third fold line and the fourth fold line; and a fourth piece bounded by the second fold line, the third fold line and the fourth fold line.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a coffee filter and a method for manufacturing the coffee filter.

Background Art

[0002] As a method for extracting coffee, a drip method in which hot water is poured onto coffee powder to extract coffee is widely known. In this drip method, for example, a dedicated paper coffee filter is attached to a dripper, coffee powder is accommodated in the coffee filter, and an appropriate amount of hot water is poured thereon to obtain coffee.

[0003] There is also a simple extraction type drip bag coffee in which coffee powder for one cup is accommodated in a paper filter of a bag-shaped bag. When using drip bag coffee, the upper part of the bag is cut off, the handle part attached to the bag is hooked on the opening edge of the cup, and hot water is poured into the bag to obtain coffee.

[0004] Patent Document 1 discloses a simple coffee bag that adopts a means formed of a locking filter body formed by a filtration filter bag and a locking frame body, and a sealed packaging bag that encloses them. The locking filter body is composed of a filtration filter bag and a locking frame body. The filtration filter bag is formed of a bag-shaped water-permeable filter sheet material with an open upper part, and the inner upper edge part of the locking frame body is adhered to the outer peripheral edge of the opening part. The locking frame body is formed of a thin plate material made of paper or synthetic resin, and a plurality of creases that can be bent into a polygon are provided vertically on the outer peripheral surface. The sealed bag is formed of a gusset-type sealed packaging bag formed of a laminated film having a plurality of barrier properties.

[0005] Patent Document 2 includes a substantially square first filter member and a second filter member that pairs with and faces the first filter member. Each of the first filter member and the second filter member has a first end portion, a second end portion, a third end portion, and a fourth end portion that are substantially square sides. The first end portions and the second end portions of the first filter member and the second filter member are joined to each other. The third end portion and the fourth end portion are open. The first end portion and the second end portion are adjacent to each other in the substantially square shape. The third end portion and the fourth end portion are adjacent to each other in the substantially square shape. By expanding the third end portion and the fourth end portion of the first filter member and the third end portion and the fourth end portion of the second filter member, an internal space into which coffee bean powder can be introduced can be formed. When the internal space is formed, the joined first end portion and second end portion serve as the bottom, and a coffee filter is disclosed.

[0006] Patent Document 3 discloses a coffee dripper with a full drip function in which a rectifying filter for regulating the flow of hot water in a conical or pyramidal shape is installed at the opening of a filtering bag whose lower part is processed into a quadratic curve shape, and the tip of the rectifying filter is arranged near the focus of the quadratic curve. A disposable type of simple coffee extraction device with a full drip function is disclosed.

[0007] Patent Document 4 discloses a bag for a simple coffee extraction tool that wraps a simple coffee extraction tool formed of a film and containing powdered coffee in a filter. The bag has a rectangular planar shape with a length and width of 80 mm or more and 180 mm or less, and a strip-shaped seal portion with a width of 5 mm or more and 10 mm or less is provided at at least one edge of the rectangle, which is formed by joining opposing films. In the strip-shaped seal portion, at least one ventilation path is formed such that one end opens inside the bag and the other end opens outside the bag, communicating the internal space of the bag to the outside of the bag. The ventilation path is constituted by a non-joined portion where the opposing films are not joined, and has a length of 40 mm or more and 300 mm or less and a width of 0.5 mm or more and 3 mm or less.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Disclosure of the Invention

Problems to be Solved by the Invention

[0009] The simple coffee bag disclosed in Patent Document 1 has a special structure in which a locking frame attached to a filtration filter bag covers the outside of the drinking mouth of a beverage cup. The filter disclosed in Patent Document 2 is used by fitting it into a coffee dripper. The simple coffee extraction tool disclosed in Patent Document 3 has a special structure in which it has a rectifying filter for regulating the flow of hot water. The bag for a simple coffee extraction tool disclosed in Patent Document 4 has a strip-shaped seal portion with a special structure.

[0010] The desire to easily drink coffee has always been strong. And a coffee filter that has a simple structure and can extract coffee easily without a special structure or a coffee dripper is expected to be in demand in the future. However, as described above, the coffee bags and the like disclosed in Patent Documents 1, 3, and 4 have special structures. Also, the filter disclosed in Patent Document 2 assumes the use of a coffee dripper.

[0011] The present invention has been made in view of the above circumstances, and an object thereof is to provide a coffee filter and a method for producing the coffee filter, which have a simple structure and can extract coffee without using a coffee dripper.

Means for Solving the Problems

[0012] (1) In a first aspect of the coffee filter of the present invention, in a developed plan view, the coffee filter includes a first side, a second side, a third side, a fourth side, a straight first fold line connecting the midpoint of the first side and the midpoint of the fourth side, a straight second fold line connecting the midpoint of the second side and the midpoint of the third side, a straight third fold line connecting the midpoint of the first side and the midpoint of the second side, a straight fourth fold line connecting the midpoint of the third side and the midpoint of the fourth side, a straight fifth fold line connecting the vertex formed by the first side and the fourth side and the vertex formed by the second side and the third side, a first piece surrounded by the first side, the third side, the third fold line, and the fourth fold line, a second piece surrounded by the second side, the fourth side, the third fold line, and the fourth fold line, a third piece A surrounded by the first fold line, the first side, and the fourth side, a third piece B surrounded by the first fold line, the third fold line, and the fourth fold line, a fourth piece A surrounded by the second fold line, the second side, and the third side, and a fourth piece B surrounded by the second fold line, the third fold line, and the fourth fold line. It has a filter body made of a single sheet of paper or non-woven fabric in a rectangular shape with an upper surface and a lower surface. In a plan view, due to the mountain-folded first fold line, the lower surface of the third piece A abuts or is adjacent to the lower surface of the third piece B, and due to the mountain-folded second fold line, the lower surface of the fourth piece A abuts or is adjacent to the lower surface of the fourth piece B. The first piece surrounded by the first side, the third side, the valley-folded third fold line, and the valley-folded fourth fold line, the second piece surrounded by the second side, the fourth side, the valley-folded third fold line, and the valley-folded fourth fold line, the third piece B surrounded by the mountain-folded third fold line, the valley-folded third fold line, and the valley-folded fourth fold line and having the fifth fold line mountain-folded so as to point to the center, and the fourth piece B surrounded by the mountain-folded third fold line, the valley-folded third fold line, and the valley-folded fourth fold line and having the fifth fold line mountain-folded so as to point to the center.functions as a powder containing portion.,

[0013] (2) In the coffee filter described in (1) above, the filter body further has a sixth fold line that is a straight line connecting the midpoint of the first side and the midpoint of the third side, and a seventh fold line that is a straight line connecting the midpoint of the second side and the midpoint of the fourth side, and the first piece portion and the second piece portion function as a holding portion that is placed on the opening edge portion of a container by the sixth fold line that is a mountain fold and the seventh fold line that is a mountain fold in a plan view.

[0014] (3) In the coffee filter described in (1) or (2) above, the filter body has a square shape in a developed plan view.

[0015] (4) In the second aspect of the coffee filter of the present invention, in a developed plan view, the coffee filter has a first side, a second side, a third side, a fourth side, a midpoint of the first side, a midpoint of the fourth side, a linear first fold connecting them, a midpoint of the second side, a midpoint of the third side, a linear second fold connecting them, a midpoint of the first side, a midpoint of the second side, a linear third fold connecting them, a midpoint of the third side, a midpoint of the fourth side, a linear fourth fold connecting them, a linear fifth fold connecting a vertex formed by the first side and the fourth side and a vertex formed by the second side and the third side, a linear sixth fold connecting the midpoint of the first side and the midpoint of the third side, a linear seventh fold connecting the midpoint of the second side and the midpoint of the fourth side, a first piece A surrounded by the sixth fold, the first side, and the third side, a first piece B surrounded by the sixth fold, the third fold, and the fourth fold, a second piece A surrounded by the seventh fold, the second side, and the fourth side, a second piece B surrounded by the seventh fold, the third fold, and the fourth fold, a third piece A surrounded by the first fold, the first side, and the fourth side, a third piece B surrounded by the first fold, the third fold, and the fourth fold, a fourth piece A surrounded by the second fold, the second side, and the third side, a fourth piece B surrounded by the second fold, the third fold, and the fourth fold, presenting a square shape and having a filter body made of paper or non-woven fabric with an upper surface portion and a lower surface portion. In a plan view, due to the first fold being mountain-folded, the lower surface portion of the third piece A abuts or is adjacent to the lower surface portion of the third piece B. Due to the second fold being mountain-folded, the lower surface portion of the fourth piece A abuts or is adjacent to the lower surface portion of the fourth piece B. The first piece B surrounded by the mountain-folded sixth fold, the valley-folded third fold, and the valley-folded fourth fold, the second piece B surrounded by the mountain-folded seventh fold, the valley-folded third fold, and the valley-folded fourth fold, the mountain-folded first fold, the valley-folded third fold,The third piece part B having the fifth fold line that is valley-folded and surrounded by the fourth fold line and is mountain-folded so as to point to the center, the first fold line that is mountain-folded, the third fold line that is valley-folded, the fourth fold line that is valley-folded, and the fourth piece part B having the fifth fold line that is valley-folded and surrounded by the fourth fold line and is mountain-folded so as to point to the center function as a powder storage part, and the filter body can be folded so that the upper surface part of the first piece part A and the upper surface part of the second piece part A are in contact or adjacent to each other.,

[0016] (5) In the first aspect of the method for manufacturing the coffee filter of the present invention, for a single sheet of paper or non-woven fabric having a rectangular shape with a first side, a second side, a third side, and a fourth side in a plan view, and having an upper surface portion and a lower surface portion, in a plan view, a straight line connecting the midpoint of the first side and the midpoint of the fourth side is mountain-folded to form a first fold line, and the region of the lower surface portion surrounded by the first side, the fourth side, and the first fold line is brought into contact with or close to the other region of the lower surface portion. A straight line connecting the midpoint of the second side and the midpoint of the third side is mountain-folded to form a second fold line, and the region of the lower surface portion surrounded by the second side, the third side, and the second fold line is brought into contact with or close to the other region of the lower surface portion. A third fold line is formed by linearly connecting the midpoint of the first side and the midpoint of the second side, a fourth fold line is formed by linearly connecting the midpoint of the third side and the midpoint of the fourth side, and a linear fifth fold line is formed by connecting the vertex formed by the first side and the third side and the vertex formed by the second side and the fourth side. The paper or non-woven fabric is folded along the third fold line, the fourth fold line, and the fifth fold line around the intersection of the third fold line, the fourth fold line, and the fifth fold line, such that the region α surrounded by the first side, the third side, the third fold line, and the fourth fold line, the region β surrounded by the second side, the fourth side, the third fold line, and the fourth fold line, the region γ surrounded by the first fold line, the third fold line, and the fourth fold line and having the fifth fold line, and the region Δ surrounded by the second fold line, the third fold line, and the fourth fold line and having the fifth fold line are close to each other, and the fifth fold line existing in the region γ and the fifth fold line existing in the region Δ are directed inward, thereby forming a filter body having a powder storage portion composed of the region α, the region β, the region γ, and the region Δ.

[0017] (6) In the second aspect of the method for manufacturing the inventive coffee filter, for a single sheet of paper or non-woven fabric having a rectangular shape with a first side, a second side, a third side, and a fourth side in plan view and having an upper surface portion and a lower surface portion, in plan view, a straight line connecting the midpoint of the first side and the midpoint of the fourth side is mountain-folded to form a first fold line, and the region of the lower surface portion surrounded by the first side, the fourth side, and the first fold line is made to abut or be close to other regions of the lower surface portion. A straight line connecting the midpoint of the second side and the midpoint of the third side is mountain-folded to form a second fold line, and the region of the lower surface portion surrounded by the second side, the third side, and the second fold line is made to abut or be close to other regions of the lower surface portion. A third fold line is formed by linearly connecting the midpoint of the first side and the midpoint of the second side, a fourth fold line is formed by linearly connecting the midpoint of the third side and the midpoint of the fourth side, a linear fifth fold line is formed by connecting the vertex formed by the first side and the third side and the vertex formed by the second side and the fourth side. The paper or non-woven fabric is folded along the third fold line, the fourth fold line, and the fifth fold line such that a part of region α surrounded by the first side, the third side, the third fold line, and the fourth fold line abuts or is close to a part of region γ surrounded by the first fold line, the third fold line, the fourth fold line, and having the fifth fold line, and another part of region α abuts or is close to a part of region Δ surrounded by the second fold line, the third fold line, the fourth fold line, and having the fifth fold line, a part of region β surrounded by the second side, the fourth side, the third fold line, and the fourth fold line abuts or is close to a part of region γ, and another part of region β abuts or is close to a part of region Δ, and the fifth fold line existing in region γ and the fifth fold line existing in region Δ abut or are close to each other. By unfolding the paper or non-woven fabric such that regions α and β are directed outward, regions α, γ, and Δ form a filter body that functions as a powder storage portion.

[0018] (7) In the method for manufacturing the coffee filter according to the above (5) or (6), further, in a plan view, a straight line connecting the midpoint of the first side and the midpoint of the third side with respect to the filter body is mountain-folded to form a sixth fold line, and a straight line connecting the midpoint of the second side and the midpoint of the fourth side is mountain-folded to form a seventh fold line, whereby the region α and the region β function as a holding portion placed on the opening edge of the container.

Effect of the Invention

[0019] According to the present invention, it is possible to provide a coffee filter having a simple structure and capable of extracting coffee without using a coffee dripper.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying out the Invention

[0021] 1. First Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.

[0022] <Configuration of Coffee Filter 10> The coffee filter 10 according to this embodiment has a single paper filter body 100.

[0023] <Configuration of Filter Body 100> As shown in FIG. 1, in a developed plan view, the filter body 100 has a planar square shape having a first side 112, a second side 114, a third side 116, and a fourth side 118, and has an upper surface portion 100a and a lower surface portion 100b. In a developed plan view (FIG. 1), the filter body 100 has a linear first fold line 121 connecting the midpoint 112a of the first side 112 and the midpoint 118a of the fourth side 118, a linear second fold line 122 connecting the midpoint 114a of the second side 114 and the midpoint 116a of the third side 116, a linear third fold line 123 connecting the midpoint 112a of the first side 112 and the midpoint 114a of the second side 114, a linear fourth fold line 124 connecting the midpoint 116a of the third side 116 and the midpoint 118a of the fourth side 118, and a linear fifth fold line 125 connecting the vertex P formed by the first side 112 and the fourth side 118 and the vertex Q formed by the second side 114 and the third side 116.

[0024] Also, in the developed plan view (Fig. 1), the filter body 100 includes a first piece portion 130 surrounded by a first side 112, a third side 116, a third fold line 123, and a fourth fold line 124; a second piece portion 140 surrounded by a second side 114, a fourth side 118, the third fold line 123, and the fourth fold line 124; a third piece portion A 152 surrounded by a first fold line 121, the first side 112, and the fourth side 118; a third piece portion B 154 surrounded by the first fold line 121, the third fold line 123, and the fourth fold line 124; a fourth piece portion A 162 surrounded by a second fold line 122, the second side 114, and the third side 116; and a fourth piece portion B 164 surrounded by the second fold line 122, the third fold line 123, and the fourth fold line 124.

[0025] And, in the plan view (Fig. 2) and the bottom view (Fig. 3), the filter body 100 is configured such that the lower surface portion of the third piece portion A 152 abuts against the lower surface portion of the third piece portion B 154 by the mountain-folded first fold line 121. Similarly, the lower surface portion of the fourth piece portion A 162 abuts against the lower surface portion of the fourth piece portion B 164 by the mountain-folded second fold line 122.

[0026] In the above configuration, in the plan view, the filter body 100 includes a first piece portion 130 surrounded by a first side 112, a third side 116, the valley-folded third fold line 123, and the valley-folded fourth fold line 124, a second piece portion 140 surrounded by a second side 114, a fourth side 118, the valley-folded third fold line 123, and the valley-folded fourth fold line 124, a third piece portion B 154 surrounded by the mountain-folded first fold line 123, the valley-folded third fold line 123, and the valley-folded fourth fold line 124, and having a fifth fold line 125 that is mountain-folded so as to point to the intersection 180 of the third fold line 123, the fourth fold line 124, and a fifth fold line 125, a fourth piece portion B 164 surrounded by the mountain-folded second fold line 122, the valley-folded third fold line 123, and the valley-folded fourth fold line 124, and having a fifth fold line 125 that is mountain-folded so as to point to the intersection 180, which constitutes the powder storage portion 170.

[0027] The filter body 100 is a filter paper, and the first side 112, the second side 114, the third side 116, and the fourth side 118 are 15 cm to 25 cm. However, these lengths can be changed as appropriate. Also, the thickness of the filter body 100 can be changed as appropriate. Also, in a plan view, the lower surface portion of the third piece portion A152 may be configured to be adjacent to the lower surface portion of the third piece portion B154, and the lower surface portion of the fourth piece portion A162 may be configured to be adjacent to the lower surface portion of the fourth piece portion B164.

[0028] <Function and Action> The function and action of the coffee filter 10 having the above configuration will be described below.

[0029] As described above, in the filter body portion 100, the first fold line 121 and the second fold line 122 are in a mountain fold state, the third fold line 126 and the fourth fold line 118 are in a valley fold state, and the fifth fold line 125 existing in the third piece portion B154 and the fifth fold line 125 existing in the fourth piece portion 160B are in a mountain fold state so as to point inward (toward the intersection point 180) respectively. Thereby, the coffee filter 10 can form a concave powder storage portion 170 that is open at the top, with the intersection point 180 as the apex and the first piece portion 130, the second piece portion 140, the third piece portion B154, and the fourth piece portion B164 as the sides, on a single paper filter body 100 in a plan view. And as shown in FIG. 4, the powder storage portion 170 has a sufficient width (X direction in FIG. 4) and height (Y direction in FIG. 4) to store coffee powder.

[0030] When extracting coffee using the coffee filter 10, place the coffee filter 10 so that the third fold line 123 and the fourth fold line 124 are in contact with the opening edge portion 200a of the coffee cup 200, store a desired amount of the desired coffee powder 300 in the powder storage portion 170, and pour hot water into the powder storage portion 170 (see FIG. 4).

[0031] In this way, the coffee filter 10 of this embodiment is composed of a single folded paper filter body 100, and coffee can be extracted with a simple structure. Further, when extracting coffee, the coffee filter 10 may be placed so that the third fold line 123 and the fourth fold line 124 are in contact with the opening edge 200a of the container, and coffee can be extracted without using a coffee dripper.

[0032] <Method for manufacturing the coffee filter 10> Such a coffee filter 10 is manufactured by the following method. First, with respect to a single sheet of paper in the shape of a regular square having a first side 112, a second side 114, a third side 116, and a fourth side 118, in a plan view, The straight line connecting the midpoint 112a of the first side 112 and the midpoint 118a of the fourth side 118 is mountain-folded to form the first fold line 121. At this time, the lower surface of the third piece part A152 is made to contact the lower surface of the third piece part B154. The straight line connecting the midpoint 114a of the second side 114 and the midpoint 116a of the third side 116 is mountain-folded to form the second fold line 122. At this time, the lower surface of the fourth piece part A162 is made to contact the lower surface of the fourth piece part B164. A third fold line 123 is formed by linearly connecting the midpoint 112a of the first side 112 and the midpoint 114a of the second side 114. After forming the third fold line 123, the paper is returned to a state where it is not folded along the third fold line 123 (released from the folded state). A fourth fold line 124 is formed by linearly connecting the midpoint 116a of the third side 116 and the midpoint 118a of the fourth side 118. After forming the fourth fold line 124, the paper is returned to a state where it is not folded along the fourth fold line 124 (released from the folded state). The straight line connecting the midpoint of the first fold line 121 and the midpoint of the second fold line 122 is folded to form a linear fifth fold line 125 connecting the vertex P formed by the first side 112 and the fourth side 118 and the vertex Q formed by the second side 114 and the third side 116. After forming the fifth fold line 125, the paper is returned to a state where it is not folded along the fifth fold line 125 (released from the folded state).

[0033] Then, along the third fold line 123, the fourth fold line 124, and the fifth fold line 125, a first piece portion 130 (region α) surrounded by the first side 112, the third side 116, the third fold line 123, and the fourth fold line 124, a second piece portion 140 (region β) surrounded by the second side 114, the fourth side 118, the third fold line 123, and the fourth fold line 124, a third piece portion B154 (region γ), and a fourth piece portion B164 (region Δ) are close to the intersection point 180. And, by folding the paper so that the fifth fold line 125 existing in the third piece portion B154 and the fifth fold line 125 existing in the fourth piece portion B164 point inward (toward the intersection point 180), a filter body 100 having a powder storage portion 170 composed of the first piece portion 130, the second piece portion 140, the third piece portion B154, and the fourth piece portion B164 is formed. At this time, the third fold line 123 and the fourth fold line 124 are in a valley-fold state, and the fifth fold line 125 is in a mountain-fold state.

[0034] Note that the order of forming the first fold line 121, the second fold line 122, the third fold line 123, and the fourth fold line 124 may be appropriately interchanged. Also, the fifth fold line 125 may be formed as follows. After forming the first fold line 121, once, put the paper in a state where it is not folded along the first fold line 121 (release it from the folded state). Also, after forming the second fold line 122, once, put the paper in a state where it is not folded along the second fold line 122 (release it from the folded state). Then, form a linear fifth fold line 125 connecting the vertex P of the first side 112 and the fourth side 118 and the vertex Q formed by the second side 114 and the third side 116. After that, make the lower surface of the third piece portion A152 contact the lower surface of the third piece portion B154, and make the lower surface of the fourth piece portion A162 contact the lower surface of the fourth piece portion B164. Note that in this case, the fifth fold line 125 may be formed before forming the first fold line 121 and the second fold line 122.

[0035] Also, after forming the fifth fold line 125, A part of the first piece portion 130 abuts or is close to a part of the third piece portion B154, Another part of the first piece portion 130 abuts or is close to a part of the fourth piece portion B164, A part of the second piece portion 140 abuts or is close to a part of the third piece portion B154, Another part of the second piece portion 140 abuts or is close to a part of the fourth piece portion B164, and The paper is folded along the third fold line 123, the fourth fold line 124, and the fifth fold line 125 such that the fifth fold line 125 existing in the third piece portion B154 and the fifth fold line 125 existing in the fourth piece portion B164 abut or are close to each other, and the paper is unfolded so that the first piece portion 130 and the second piece portion 140 face outward, whereby a filter body 100 in which the first piece portion 130, the second piece portion 140, the third piece portion B154, and the fourth piece portion B164 function as a powder storage portion 170 is formed. At this time, the third fold line 123 and the fourth fold line 124 are in a valley fold state, and the fifth fold line 125 is in a mountain fold state.

[0036] Note that the material of the filter body 100 may be other than paper as long as it can form a fold line and can extract (filter) coffee from coffee powder 300. For example, it may be a non-woven fabric or the like. Also, the coffee filter 10 does not exclude the existence of components other than the filter body 100. For example, another filter (not shown) may be placed on the upper surface portion 100a of the filter body 100 to extract coffee, or a coffee dripper may be used to extract coffee.

[0037] Note that the coffee filter 10, as shown in FIG. 6, The upper part of the first piece portion 130 abuts or is close to the upper part of the second piece portion 140, A part of the lower part of the first piece portion abuts or is close to a part of the third piece portion B154, Another part of the lower part of the first piece portion abuts or is close to a part of the fourth piece portion B164, A part of the lower part of the second piece portion 140 abuts or is close to a part of the third piece portion B154, Another part of the lower portion of the second piece portion 140 abuts or is close to a part of the fourth piece portion B164, and It can be folded so that the fifth fold line 125 existing in the third piece portion B154 and the fifth fold line 125 existing in the fourth piece portion B164 abut or are close to each other. The coffee filter 10 folded in this way is economical because it does not take up much space even when multiple filters are stacked, and thus can be stored anywhere, or because many coffee filters 10 can be transported at once.

[0038] 2. Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. The same reference numerals are used for the same components as in the first embodiment.

[0039] <Configuration of Coffee Filter 20> The coffee filter 20 according to this embodiment has a single paper filter body 100'.

[0040] <Configuration of Filter Body 100'> As shown in FIG. 7, in a developed plan view, the filter body 100' has a planar square shape having a first side 112, a second side 114, a third side 116, and a fourth side 118, and has an upper surface portion 100a and a lower surface portion 100b. In the developed plan view (Fig. 7), the filter body 100' has a linear first fold line 121 connecting the midpoint 112a of the first side 112 and the midpoint 118a of the fourth side 118, a linear second fold line 122 connecting the midpoint 114a of the second side 114 and the midpoint 116a of the third side 116, a linear third fold line 123 connecting the midpoint 112a of the first side 112 and the midpoint 114a of the second side 114, a linear fourth fold line 124 connecting the midpoint 116a of the third side 116 and the midpoint 118a of the fourth side 118, a linear fifth fold line 125 connecting the vertex P formed by the first side 112 and the fourth side 118 and the vertex Q formed by the second side 114 and the third side 116, a linear sixth fold line 126 connecting the midpoint 112a of the first side 112 and the midpoint 116a of the third side 116, and a linear seventh fold line 127 connecting the midpoint 114a of the second side 114 and the midpoint 118a of the fourth side 118.

[0041] Also, in the developed plan view (Fig. 7), the filter body 100' has a first piece part 130 surrounded by the first side 112, the third side 116, the third fold line 123, and the fourth fold line 124, a second piece part 140 surrounded by the second side 114, the fourth side 118, the third fold line 123, and the fourth fold line 124, a third piece part A152 surrounded by the first fold line 121, the first side 112, and the fourth side 118, a third piece part B154 surrounded by the first fold line 121, the third fold line 123, and the fourth fold line 124, a fourth piece part A162 surrounded by the second fold line 122, the second side 114, and the third side 116, and a fourth piece part B164 surrounded by the second fold line 122, the third fold line 123, and the fourth fold line 124. Also, the first piece part 130 has a first piece part A132 surrounded by the first side 112, the third side 116, and the sixth fold line 126, and a first piece part B134 surrounded by the third fold line 123, the fourth fold line 124, and the sixth fold line 126. Also, the second piece part 140 has a second piece part A132 surrounded by the second side 114, the fourth side 118, and the seventh fold line 127, and a second piece part B134 surrounded by the third fold line 123, the fourth fold line 124, and the seventh fold line 127.

[0042] In a plan view (FIG. 8) and a bottom view (FIG. 9), the filter body 100' is configured such that the lower surface portion of the third piece portion A152 abuts against the lower surface portion of the third piece portion B154 by the first valley fold 121. Similarly, the lower surface portion of the fourth piece portion A162 abuts against the lower surface portion of the fourth piece portion B164 by the second valley fold 122. Also, by the sixth valley fold 126, the first piece portion A132 is directed slightly downward. Also, by the seventh valley fold 127, the second piece portion A142 is directed slightly downward.

[0043] In the above configuration, in a plan view, the filter body 100' Among the first piece portion 130, the first piece portion B134 surrounded by the third valley fold 123, the fourth valley fold 124, and the sixth valley fold 126, Among the second piece portion 140, the second piece portion B144 surrounded by the third valley fold 123, the fourth valley fold 124, and the seventh valley fold 127, The third piece portion B154 surrounded by the first valley fold 121, the third valley fold 123, and the fourth valley fold 124 and having a fifth valley fold 125 that is valley-folded so as to point to the intersection 180 of the third fold 123, the fourth fold 124, and the fifth fold 125, The fourth piece portion B164 surrounded by the second valley fold 122, the third valley fold 123, and the fourth valley fold 124 and having a fifth valley fold 125 that is valley-folded so as to point to the intersection 180, constitute the powder storage portion 170.

[0044] The filter body 100' is a filter paper, and the first side 112, the second side 114, the third side 116, and the fourth side 118 are 15 cm to 25 cm. However, these lengths can be changed as appropriate. Also, the thickness of the filter body 100' can be changed as appropriate. In addition, in a plan view, the lower surface portion of the third piece portion A152 may be configured to be adjacent to the lower surface portion of the third piece portion B154, and the lower surface portion of the fourth piece portion A162 may be configured to be adjacent to the lower surface portion of the fourth piece portion B164.

[0045] <Function and Action> The function and action of the coffee filter 20 having the above configuration will be described below.

[0046] As described above, in the filter main body portion 100', the first fold line 121 and the second fold line 122 are in a mountain fold state, the third fold line 123 and the fourth fold line 124 are in a valley fold state, and the fifth fold line 125 existing in the third piece portion B154 and the fifth fold line 125 existing in the fourth piece portion B164 are in a mountain fold state so as to respectively point inward (toward the intersection point 180). Thereby, the coffee filter 20 can form, on a single paper filter main body 100', a concave powder storage portion 170 that is open at the top and has, in a plan view, the intersection point 180 as the vertex and the first piece portion 130 (first piece portion B134), the second piece portion 140 (second piece portion B144), the third piece portion B154, and the fourth piece portion B164 as the sides. And as shown in FIG. 9, the powder storage portion 170 has a sufficient width (X direction in FIG. 9) and height (Y direction in FIG. 9) to store coffee powder.

[0047] When extracting coffee using the coffee filter 20, place the coffee filter 20 so that the first piece portion A132 and the second piece portion A142 are in contact with the opening edge portion 200a of the coffee cup 200, store a desired amount of the desired coffee powder 300 in the powder storage portion 170, and pour hot water into the powder storage portion 170 (see FIG. 9). That is, due to the mountain-folded sixth fold line 126 and the mountain-folded seventh fold line 127, the first piece portion A132 and the second piece portion A142 function as a holding mechanism for holding the coffee filter 20 on the opening edge portion 200a of the coffee cup 200. Therefore, it becomes possible to place the coffee filter 20 on the coffee cup 200 in a more stable state.

[0048] Thus, the coffee filter 20 is composed of a single folded paper filter body 100', and coffee can be extracted with a simple structure. Also, when extracting coffee, the coffee filter 20 may be placed so that the first piece part A132 and the second piece part A142 are in contact with the opening edge part 200a of the container, and coffee can be extracted without using a coffee dripper.

[0049] <Method for manufacturing the coffee filter 20> Such a coffee filter 20 is manufactured by the following method. First, with respect to a single square piece of paper having a first side 112, a second side 114, a third side 116, and a fourth side 118, in a plan view, A straight line connecting the midpoint 112a of the first side 112 and the midpoint 118a of the fourth side 118 is mountain-folded to form a first fold line 121. At this time, the lower surface part of the third piece part A152 is made to contact the lower surface part of the third piece part B154. A straight line connecting the midpoint 114a of the second side 114 and the midpoint 116a of the third side 116 is mountain-folded to form a second fold line 122. At this time, the lower surface part of the fourth piece part A162 is made to contact the lower surface part of the fourth piece part B164. A third fold line 123 is formed by linearly connecting the midpoint 112a of the first side 112 and the midpoint 114a of the second side 114. After forming the third fold line 123, the paper is returned to a state where it is not folded along the third fold line 123 (released from the folded state). A fourth fold line 124 is formed by linearly connecting the midpoint 116a of the third side 116 and the midpoint 118a of the fourth side 118. After forming the fourth fold line 124, the paper is returned to a state where it is not folded along the fourth fold line 124 (released from the folded state). The straight line connecting the midpoint of the first fold line 121 and the midpoint of the second fold line 122 is folded to form a linear fifth fold line 125 connecting the vertex P formed by the first side 112 and the fourth side 118 and the vertex Q formed by the second side 114 and the third side 116. After forming the fifth fold line 125, the paper is returned to a state where it is not folded along the fifth fold line 125 (released from the folded state). Also, a sixth fold line 126 is formed by linearly connecting the midpoint 112a of the first side 112 and the midpoint 116a of the third side 116. Also, a seventh fold line 127 is formed by linearly connecting the midpoint 114a of the second side 114 and the midpoint 118a of the fourth side 118.

[0050] And Orient the side of the vertex N formed by the first side 112 and the third side 116 of the first piece part A132 surrounded by the sixth fold line 126, the first side 112, and the third side 116 slightly outward. Orient the side of the vertex O formed by the second side 114 and the fourth side 118 of the second piece part A142 surrounded by the seventh fold line 127, the second side 114, and the fourth side 118 slightly outward. Fold the paper so that the first piece part B134 of the first piece part 130 (region α), the second piece part B144 of the second piece part 140 (region β), the third piece part B154 (region γ), and the fourth piece part B164 (region Δ) approach each other around the intersection point 180, and the fifth fold line 125 existing in the third piece part B154 and the fifth fold line 125 existing in the fourth piece part B164 point inward (towards the intersection point 180), thereby forming a filter body 100' having a powder storage part 170 composed of the first piece part B134, the second piece part B144, the third piece part B154, and the fourth piece part B164. At this time, the third fold line 123 and the fourth fold line 124 are in a valley fold state, and the fifth fold line 125, the sixth fold line 126, and the seventh fold line 127 are in a mountain fold state.

[0051] The order of forming the first fold line 121, the second fold line 122, the third fold line 123, the fourth fold line 124, the sixth fold line 126, and the seventh fold line 127 may be appropriately interchanged. Also, the fifth fold line 125 may be formed as follows. After forming the first fold line 121, once, put the paper in a state where it is not folded along the first fold line 121 (release it from the folded state). Also, after forming the second fold line 122, once, put the paper in a state where it is not folded along the second fold line 122 (release it from the folded state). Then, form a linear fifth fold line 125 that connects the vertex P of the first side 112 and the fourth side 128 and the vertex Q formed by the second side 114 and the fourth side 118. After that, make the lower surface of the third piece part A152 contact the lower surface of the third piece part B154, and also make the lower surface of the fourth piece part A162 contact the lower surface of the fourth piece part B164. In this case, the fifth fold line 125 may be formed before forming the first fold line 121 and the second fold line 122.

[0052] Also, after forming the fifth fold line 125, A part of the first piece part B134 contacts or is close to a part of the third piece part B154, Another part of the first piece part B134 contacts or is close to a part of the fourth piece part B164, A part of the second piece part B144 contacts or is close to a part of the third piece part B154, Another part of the second piece part B144 contacts or is close to a part of the fourth piece part B164, and Make the fifth fold line 125 existing in the third piece part B154 and the fifth fold line 125 existing in the fourth piece part B164 contact or be close to each other, Fold the paper along the third fold line 123, the fourth fold line 124, and the fifth fold line 125, and unfold the paper so that the first piece part A132 points to the vertex N side and the second piece part A142 points to the vertex O side, whereby a filter body 100' in which the first piece part B134, the second piece part B144, the third piece part B154, and the fourth piece part B164 function as a powder storage part 170 is formed. At this time, the third fold line 123 and the fourth fold line 124 are in a valley fold state, and the fifth fold line 125, the sixth fold line 126, and the seventh fold line 127 are in a mountain fold state.

[0053] Note that the material of the filter body 100' may be other than paper as long as it can form folds and extract (filter) coffee from coffee powder 300. For example, it may be a non-woven fabric or the like. In addition, the coffee filter 20 does not exclude the existence of components other than the filter body 100'. For example, another filter (not shown) may be placed on the upper surface portion 100a of the filter body 100' to extract coffee, or a coffee dripper may be used to extract coffee.

[0054] Note that as shown in FIG. 12, the coffee filter 20 the first piece portion A132 abuts or is close to the second piece portion A142, the first piece portion B134 abuts or is close to a part of the third piece portion B154, the first piece portion B134 abuts or is close to a part of the fourth piece portion B164, the second piece portion B144 abuts or is close to a part of the third piece portion B154, the second piece portion B144 abuts or is close to a part of the fourth piece portion B164, and it can be folded so that the fifth fold 125 existing in the third piece portion B154 and the fifth fold 125 existing in the fourth piece portion B164 abut or are close to each other. The coffee filter 20 folded in this way does not take up much space even when multiple filters are stacked, so it does not require a specific storage location or can transport a large number of coffee filters 20 at once, making it economical.

[0055] Note that the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the invention, of course.

Explanation of Reference Numerals

[0056] 10, 20... coffee filter 100, 100'... filter body 100a... surface portion 112... first side 114... second side 116... third side 118... fourth side 121 … First fold line 122 … Second fold line 123 … Third fold line 124 … Fourth fold line 125 … Fifth fold line 126 … Sixth fold line 127 … Seventh fold line 130 … First piece part 140 … Second piece part 152 … Third piece part A 154 … Third piece part B 162 … Fourth piece part A 164 … Fourth piece part B 170 … Powder storage part 200 … Coffee cup (container) 200a … Opening edge part

Claims

1. In the developed plan view, The first side and The second side, The third side, The fourth side, a first straight fold line connecting a midpoint of the first side and a midpoint of the fourth side; a linear second fold line connecting a midpoint of the second side and a midpoint of the third side; a third fold line that is a straight line connecting a midpoint of the first side and a midpoint of the second side; a fourth fold line that is a straight line connecting a midpoint of the third side and a midpoint of the fourth side; a fifth fold line that is linear and connects a vertex formed by the first side and the fourth side and a vertex formed by the second side and the third side; a first piece portion surrounded by the first side, the third side, the third fold, and the fourth fold; a second piece portion surrounded by the second side, the fourth side, the third fold, and the fourth fold; a third piece A surrounded by the first fold, the first side, and the fourth side; a third piece B surrounded by the first fold, the third fold, and the fourth fold; a fourth piece A surrounded by the second fold, the second side, and the third side; a fourth piece B surrounded by the second fold, the third fold, and the fourth fold; The filter body has a rectangular shape and is made of a single sheet of paper or nonwoven fabric having an upper surface and a lower surface, The filter body, in a plan view, Due to the first fold, the lower surface of the third piece A abuts or is adjacent to the lower surface of the third piece B, Due to the second fold, the lower surface of the fourth piece A abuts or is adjacent to the lower surface of the fourth piece B, the first piece portion surrounded by the first side, the third side, the third fold line formed by a valley fold, and the fourth fold line formed by a valley fold; the second piece portion surrounded by the second side, the fourth side, the third fold line formed by a valley fold, and the fourth fold line formed by a valley fold; the third piece B being surrounded by the first fold line which is a mountain fold, the third fold line which is a valley fold, and the fourth fold line which is a valley fold, and having the fifth fold line which is a mountain fold so as to be directed toward the center; The fourth piece B is surrounded by the second fold that is a mountain fold, the third fold that is a valley fold, and the fourth fold that is a valley fold, and has the fifth fold that is a mountain fold that is directed toward the center, and functions as a powder containing section. Coffee filter.

2. The filter body further comprises: A sixth straight fold line connecting the midpoint of the first side and the midpoint of the third side; a seventh fold line that is a straight line connecting the midpoint of the second side and the midpoint of the fourth side; In plan view, 2. The coffee filter according to claim 1, wherein the first piece and the second piece function as a holding portion to be placed on the opening edge of a container by the sixth fold and the seventh fold, which are mountain folds.

3. The coffee filter according to claim 1 or 2, wherein the filter body has a square shape in a developed plan view.

4. In the developed plan view, The first side and The second side, The third side, The fourth side, a first straight fold line connecting a midpoint of the first side and a midpoint of the fourth side; a linear second fold line connecting a midpoint of the second side and a midpoint of the third side; a third fold line that is a straight line connecting a midpoint of the first side and a midpoint of the second side; a fourth fold line that is a straight line connecting a midpoint of the third side and a midpoint of the fourth side; a fifth fold line that is linear and connects a vertex formed by the first side and the fourth side and a vertex formed by the second side and the third side; A sixth straight fold line connecting the midpoint of the first side and the midpoint of the third side; a seventh straight fold line connecting the midpoint of the second side and the midpoint of the fourth side; a first piece portion A surrounded by the sixth fold, the first side, and the third side; a first piece portion B surrounded by the sixth fold, the third fold, and the fourth fold; a second piece A surrounded by the seventh fold, the second side, and the fourth side; a second piece B surrounded by the seventh fold, the third fold, and the fourth fold; a third piece A surrounded by the first fold, the first side, and the fourth side; a third piece B surrounded by the first fold, the third fold, and the fourth fold; a fourth piece A surrounded by the second fold, the second side, and the third side; a fourth piece B surrounded by the second fold, the third fold, and the fourth fold; The filter body is made of a single sheet of paper or nonwoven fabric and has a square shape and an upper surface and a lower surface, The filter body, in a plan view, Due to the first fold, the lower surface of the third piece A abuts or is adjacent to the lower surface of the third piece B, Due to the second fold, the lower surface of the fourth piece A abuts or is adjacent to the lower surface of the fourth piece B, the first piece B surrounded by the sixth fold line which is a mountain fold, the third fold line which is a valley fold, and the fourth fold line which is a valley fold; the second piece B surrounded by the seventh fold line which is a mountain fold, the third fold line which is a valley fold, and the fourth fold line which is a valley fold; the third piece B being surrounded by the first fold line which is a mountain fold, the third fold line which is a valley fold, and the fourth fold line which is a valley fold, and having the fifth fold line which is a mountain fold so as to be directed toward the center; the fourth piece B is surrounded by the second fold which is a mountain fold, the third fold which is a valley fold, and the fourth fold which is a valley fold, and has the fifth fold which is a mountain fold so as to face the center, and functions as a powder containing section; The coffee filter can be folded such that the upper surface of the first piece A and the upper surface of the second piece A are in contact with or adjacent to each other.

5. A method for producing a coffee filter having a filter body, comprising the steps of: A sheet of paper or nonwoven fabric having a rectangular shape with a first side, a second side, a third side, and a fourth side in a plan view and having an upper surface and a lower surface, In plan view, a straight line connecting the midpoint of the first side and the midpoint of the fourth side is folded in a mountain shape to form a first fold, and an area of ​​the lower surface portion that is surrounded by the first side, the fourth side, and the first fold is brought into contact with or adjacent to another area of ​​the lower surface portion; a straight line connecting the midpoint of the second side and the midpoint of the third side is folded in a mountain shape to form a second fold, and an area of ​​the lower surface portion that is surrounded by the second side, the third side, and the second fold is brought into contact with or adjacent to another area of ​​the lower surface portion; forming a third fold line linearly connecting the midpoint of the first side and the midpoint of the second side; forming a fourth fold line connecting the midpoint of the third side and the midpoint of the fourth side in a straight line; forming a fifth fold line that is a straight line connecting a vertex formed by the first side and the third side and a vertex formed by the second side and the fourth side; The paper or nonwoven fabric is a region α surrounded by the first side, the third side, the third fold, and the fourth fold, a region β surrounded by the second side, the fourth side, the third fold, and the fourth fold, a region γ surrounded by the first fold, the third fold, and the fourth fold and having the fifth fold, and a region Δ surrounded by the second fold, the third fold, and the fourth fold and having the fifth fold are close to each other, and the fifth fold present in the region γ and the fifth fold present in the region Δ are oriented inwardly, forming a filter body having a powder storage section including the region α, the region β, the region γ, and the region Δ; How to make coffee filters.

6. A method for producing a coffee filter having a filter body, comprising the steps of: A sheet of paper or nonwoven fabric having a rectangular shape with a first side, a second side, a third side, and a fourth side in a plan view and having an upper surface and a lower surface, In plan view, a straight line connecting the midpoint of the first side and the midpoint of the fourth side is folded in a mountain shape to form a first fold, and an area of ​​the lower surface portion that is surrounded by the first side, the fourth side, and the first fold is brought into contact with or adjacent to another area of ​​the lower surface portion; a straight line connecting the midpoint of the second side and the midpoint of the third side is folded to form a second fold, and the second fold is made to abut or be adjacent to a region of the lower surface portion that is surrounded by the second side, the third side, and the second fold, and to other regions of the lower surface portion; forming a third fold line linearly connecting the midpoint of the first side and the midpoint of the second side; forming a fourth fold line connecting the midpoint of the third side and the midpoint of the fourth side in a straight line; forming a fifth fold line that is a straight line connecting a vertex formed by the first side and the third side and a vertex formed by the second side and the fourth side; The paper or nonwoven fabric is folding along the third fold, the fourth fold, and the fifth fold such that a portion of the region α surrounded by the first side, the third side, the third fold, and the fourth fold abuts or is adjacent to a portion of the region γ surrounded by the first fold, the third fold, and the fourth fold and having the fifth fold, another portion of the region α abuts or is adjacent to a portion of the region Δ surrounded by the second fold, the third fold, and the fourth fold and having the fifth fold, a portion of the region β surrounded by the second side, the fourth side, the third fold, and the fourth fold abuts or is adjacent to a portion of the region γ, another portion of the region β abuts or is adjacent to a portion of the region Δ, and the fifth fold present in the region γ and the fifth fold present in the region Δ abut or are adjacent to each other; The paper or nonwoven fabric is spread so that the region α and the region β are oriented outward, whereby the region α, the region γ, and the region Δ form a filter body that functions as a powder storage section. How to make coffee filters.

7. Furthermore, in a plan view, the filter body has forming a sixth fold by folding a straight line connecting the midpoint of the first side and the midpoint of the third side; A seventh fold is formed by folding a straight line connecting the midpoint of the second side and the midpoint of the fourth side in a mountain fold, The method for producing a coffee filter according to claim 5 or 6, wherein the region α and the region β function as a holding portion to be placed on an opening edge portion of a container.

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