JP5917837B2 - Filter for extracting coffee and tea, and method for producing the same - Google Patents
Filter for extracting coffee and tea, and method for producing the same Download PDFInfo
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- JP5917837B2 JP5917837B2 JP2011130282A JP2011130282A JP5917837B2 JP 5917837 B2 JP5917837 B2 JP 5917837B2 JP 2011130282 A JP2011130282 A JP 2011130282A JP 2011130282 A JP2011130282 A JP 2011130282A JP 5917837 B2 JP5917837 B2 JP 5917837B2
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- 241001122767 Theaceae Species 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 229910001020 Au alloy Inorganic materials 0.000 claims description 11
- 239000003353 gold alloy Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000005323 electroforming Methods 0.000 claims description 6
- 238000001459 lithography Methods 0.000 claims description 5
- 238000000605 extraction Methods 0.000 description 14
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 11
- 239000010931 gold Substances 0.000 description 11
- 229910052737 gold Inorganic materials 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910001112 rose gold Inorganic materials 0.000 description 2
- 239000010938 white gold Substances 0.000 description 2
- 229910000832 white gold Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001254 electrum Inorganic materials 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010940 green gold Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 239000010930 yellow gold Substances 0.000 description 1
- 229910001097 yellow gold Inorganic materials 0.000 description 1
Description
本発明は、コーヒー及び茶類抽出用のフィルタに関する。 The present invention relates to a filter for coffee and tea extraction.
ペーパーフィルターでない抽出用フィルタとして、金属フィルタが開示されている（特許文献１及び特許文献２参照）。 Metal filters are disclosed as extraction filters that are not paper filters (see Patent Document 1 and Patent Document 2).
しかしながら、金属製フィルタの素材としてステンレスを用いた場合には、錆び難いという利点はあるものの、該フィルタにより抽出されるコーヒーや茶の中へ、ステンレス中のニッケルや鉄が溶出することが懸念される。鉄が溶出すると、コーヒーや茶の香りや味を損ねることになる。 However, when stainless steel is used as the material for the metal filter, there is an advantage that it does not rust easily, but there is a concern that nickel and iron in the stainless steel may elute into the coffee and tea extracted by the filter. The If iron elutes, it will damage the aroma and taste of coffee and tea.
ステンレスのメッシュに金めっきを施したコーヒーフィルタも市販されているが、金めっきが剥がれた場合にはステンレスのメッシュが露出し、同様にニッケルや鉄が溶出し得る状態となる。 A coffee filter in which a stainless steel mesh is gold-plated is also commercially available. However, when the gold plating is peeled off, the stainless steel mesh is exposed and nickel and iron can be eluted similarly.
本発明は、上記事実を考慮して、金属フィルタにより抽出されるコーヒーや茶への金属臭の移りを抑制することを目的とする。 In view of the above fact, an object of the present invention is to suppress the transfer of a metal odor to coffee or tea extracted by a metal filter.
請求項１の発明（コーヒー及び茶類抽出用のフィルタの製造方法）は、紫外線又はＸ線を用いたリソグラフィ工程と電鋳工程とを組み合わせて、ニッケルを含まない金合金又は純金で構成され、第１方向にジグザグに延びる縦要素と、該第１方向と交差する第２方向に延び該縦要素を連結する横要素と、が配列されると共に、円環状の外周枠と、前記外周枠と同心に形成された円形の中心枠とが一体的に形成された平面的なメッシュ母材を製作し、前記外周枠に対して前記中心枠を押し込むことで、前記メッシュ母材のメッシュを円錐状に引き延ばし、前記縦要素を伸長させて、隣接する該縦要素同士の間隔を広げて前記メッシュの開口を拡大させる。 The invention of claim 1 (a method for producing a filter for coffee and tea extraction) is composed of a gold alloy or pure gold that does not contain nickel by combining a lithography process and an electroforming process using ultraviolet rays or X-rays. A vertical element extending zigzag in a first direction and a horizontal element extending in a second direction intersecting the first direction and connecting the vertical elements are arranged, an annular outer peripheral frame, and the outer peripheral frame A flat mesh base material formed integrally with a concentric circular center frame is manufactured, and the mesh of the mesh base material is formed into a conical shape by pushing the center frame into the outer peripheral frame. And the vertical elements are extended to widen the gap between the adjacent vertical elements to enlarge the opening of the mesh.
このコーヒー及び茶類抽出用のフィルタの製造方法では、リソグラフィ工程と電鋳工程とを組み合わせることによって、ニッケルを含まない金合金又は純金で構成され、縦要素及び横要素とが配列されたメッシュ母材を容易に製造することができる。またメッシュ母材のメッシュを円錐状に引き延ばし、ジグザグ状の縦要素を伸長させてメッシュの開口を拡大させるので、該開口の大きさの調整が容易である。このため、コーヒーや茶を適切に抽出でき、かつその抽出時に金属臭の移りを抑制可能なフィルタを、容易に製造することができる。 In this method for producing a filter for coffee and tea extraction, a mesh mother composed of a gold alloy or pure gold not containing nickel and having vertical and horizontal elements arranged by combining a lithography process and an electroforming process. The material can be easily manufactured. Further, since the mesh of the mesh base material is stretched in a conical shape and the zigzag vertical element is extended to enlarge the opening of the mesh, the size of the opening can be easily adjusted. For this reason, it is possible to easily manufacture a filter that can appropriately extract coffee and tea and can suppress the transfer of the metal odor during the extraction.
請求項１に記載のコーヒー及び茶類抽出用のフィルタの製造方法によれば、コーヒーや茶を適切に抽出でき、かつその抽出時に金属臭の移りを抑制可能なフィルタを、容易に製造することができる、という優れた効果が得られる。 According to the method for producing a filter for extracting coffee and tea according to claim 1 , it is possible to easily produce a filter that can appropriately extract coffee and tea and can suppress the transfer of metal odor during the extraction. The excellent effect of being able to be obtained is obtained.
以下、本発明を実施するための形態を図面に基づき説明する。
（抽出用フィルタの製造方法）
図１において、本実施形態に係るコーヒー及び茶類抽出用のフィルタの製造方法は、まず、紫外線又はＸ線を用いたリソグラフィ工程と電鋳工程とを組み合わせて、金合金及び又は純金で構成された平面的なメッシュ母材１２を製作する。
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(Extraction filter manufacturing method)
In FIG. 1, the method for producing a filter for coffee and tea extraction according to the present embodiment is composed of a gold alloy and / or pure gold by combining a lithography process using ultraviolet rays or X-rays and an electroforming process. A flat mesh base material 12 is produced.
金合金は、金に他の金属を混合した合金であり、該金属の種類やその配合率によって色が変わる。代表的な金合金として、例えばイエローゴールド、グリーンゴールド、ピンクゴールド、レッドゴールド、ホワイトゴールドが挙げられる。ホワイトゴールドにはニッケル系とパラジウム系があるが、ニッケル系は用いず、パラジウム系を用いることが望ましい。純金の場合には、比較的強度が小さいため、例えば、厚みを１５０μｍ、質量を１５ｇとする。一方、金合金は純金よりも強度が大きいため、フィルタ１０の厚みを５０μｍ、質量を５ｇとすることができる。 The gold alloy is an alloy in which other metal is mixed with gold, and the color changes depending on the type of the metal and its blending ratio. Examples of typical gold alloys include yellow gold, green gold, pink gold, red gold, and white gold. White gold includes nickel-based and palladium-based, but it is desirable not to use nickel-based but to use palladium-based. In the case of pure gold, since the strength is relatively small, for example, the thickness is 150 μm and the mass is 15 g. On the other hand, since the gold alloy is stronger than pure gold, the thickness of the filter 10 can be 50 μm and the mass can be 5 g.
メッシュ母材１２は、全体として例えば円形に形成され、円環状の外周枠１２Ａと、該外周枠１２Ａと同心に形成される円形の中心枠１２Ｂとは、夫々非メッシュ領域とされる。外周枠１２Ａには、治具１６のピン１８を通すための複数の貫通孔１２Ｃが周方向に所定間隔で形成されている。また外周枠１２Ａには、メッシュ母材１２の径方向に延びる複数のスリット１２Ｄが周方向に適宜配列されている。このスリット１２Ｄにより、後述するメッシュ１４を立体的に引き延ばす際に、外周枠１２Ａでの皺の発生を抑制できるようになっている。 The mesh base material 12 is formed, for example, in a circular shape as a whole, and an annular outer peripheral frame 12A and a circular center frame 12B formed concentrically with the outer peripheral frame 12A are non-mesh regions. A plurality of through holes 12C through which the pins 18 of the jig 16 are passed are formed in the outer peripheral frame 12A at predetermined intervals in the circumferential direction. In the outer peripheral frame 12A, a plurality of slits 12D extending in the radial direction of the mesh base material 12 are appropriately arranged in the circumferential direction. This slit 12D can suppress the generation of wrinkles in the outer peripheral frame 12A when the mesh 14 described later is stretched three-dimensionally.
メッシュ母材１２における外周枠１２Ａと中心枠１２Ｂとの間には、メッシュ１４が形成される。メッシュ１４には、補強のため、例えば円環状の非メッシュ枠１４Ｄ，１４Ｅが同心円状に形成されている。外周枠１２Ａ、メッシュ１４、中心枠１２Ｂ、非メッシュ枠１４Ｄ，１４Ｅを、電鋳により一体成形することにより、メッシュ母材１２が構成される。 A mesh 14 is formed between the outer peripheral frame 12 </ b> A and the center frame 12 </ b> B in the mesh base material 12. For reinforcement, for example, annular non-mesh frames 14D and 14E are formed on the mesh 14 concentrically. The mesh base material 12 is configured by integrally forming the outer peripheral frame 12A, the mesh 14, the center frame 12B, and the non-mesh frames 14D and 14E by electroforming.
図３（Ａ），図４（Ａ）の拡大図に示されるように、このメッシュ１４には、メッシュ母材１２の径方向（第１方向Ｄ）にジグザグに延びる縦要素１４Ｖと、該径方向と交差する周方向（第２方向Ｃ）に延び該縦要素１４Ｖを連結する横要素１４Ｈと、が配列される。横要素１４Ｈは、縦要素１４Ｖと比較して幅広に構成されている。縦要素１４Ｖのうち、横要素１４Ｈと交差する部位は、強度を高めるために、部分的な幅広部１４Ｂとなっている。縦要素１４Ｖと横要素１４Ｈで囲まれた部分は、開口１４Ｃとなっている。 As shown in the enlarged views of FIGS. 3 (A) and 4 (A), the mesh 14 includes a vertical element 14V extending zigzag in the radial direction (first direction D) of the mesh base material 12, and the diameter. The horizontal elements 14H extending in the circumferential direction (second direction C) intersecting the direction and connecting the vertical elements 14V are arranged. The horizontal element 14H is configured wider than the vertical element 14V. A portion of the vertical element 14V that intersects the horizontal element 14H is a partially wide portion 14B in order to increase the strength. A portion surrounded by the vertical element 14V and the horizontal element 14H is an opening 14C.
なお、縦要素１４Ｖの振幅や周期は適宜変化していてもよい。またジグザグとは、振幅を有する波形であることを意味する。従って、ジグザグには、三角波状のものに限られず、正弦波状のものや、矩形波状のもの、或いはこれらを夫々半波状にしたものも含まれる。また各種波形を適宜組み合わせてもよい。 In addition, the amplitude and period of the vertical element 14V may be changed as appropriate. The zigzag means a waveform having an amplitude. Therefore, the zigzag is not limited to a triangular wave shape, but includes a sine wave shape, a rectangular wave shape, or a half wave shape. Various waveforms may be appropriately combined.
メッシュ母材１２において、第１方向Ｄが径方向であり、第２方向Ｃが周方向であるものとしたが、第１方向Ｄ及び第２方向Ｃはこれに限られず、互いに交差する方向であればよい。 In the mesh base material 12, the first direction D is the radial direction, and the second direction C is the circumferential direction. However, the first direction D and the second direction C are not limited to this, and the directions intersect each other. I just need it.
次に、メッシュ母材１２を、例えば容器状や筒状に立体的に引き延ばし、縦要素１４Ｖを伸長させて、隣接する該縦要素１４Ｖ同士の間隔を広げてメッシュ１４の開口１４Ｃを拡大させる。具体的には、図１，図２に示されるように、まずメッシュ母材１２の外周枠１２Ａを保持するための治具１６を用意する。この治具１６は、例えば円環状に形成され、内径が、メッシュ母材１２における外周枠１２Ａの内径（メッシュ１４の外径）に対応している。また治具１６には、外周枠１２Ａの貫通孔１２Ｃに挿通可能な複数のピン１８が設けられている。 Next, the mesh base material 12 is three-dimensionally extended into a container shape or a cylindrical shape, for example, the vertical elements 14V are extended, and the openings 14C of the mesh 14 are expanded by widening the interval between the adjacent vertical elements 14V. Specifically, as shown in FIGS. 1 and 2, first, a jig 16 for holding the outer peripheral frame 12 </ b> A of the mesh base material 12 is prepared. The jig 16 is formed, for example, in an annular shape, and the inner diameter corresponds to the inner diameter of the outer peripheral frame 12A (the outer diameter of the mesh 14) in the mesh base material 12. The jig 16 is provided with a plurality of pins 18 that can be inserted into the through holes 12C of the outer peripheral frame 12A.
図２に示されるように、貫通孔１２Ｃにピン１８を通すようにして、メッシュ母材１２を治具１６上に載置し、該メッシュ母材１２の中心枠１２Ｂに、例えば丸棒状の押圧部材２０を当てて押し込むことで、メッシュ１４を立体的に引き延ばす。外周枠１２Ａと中心枠１２Ｂとが同心円状となっているため、メッシュ１４は引き延ばされて円錐状となる。このとき、図示しない押え部材により、メッシュ母材１２の外周枠１２Ａを治具１６との間に挟み込んで保持しておくことが望ましい。このようにして、図５，図６に示されるように、コーヒー及び茶類抽出用のフィルタ１０が立体的かつ一体的に成形される。なお、図６は、フィルタの実物を示す写真である。 As shown in FIG. 2, the mesh base material 12 is placed on the jig 16 so that the pin 18 passes through the through hole 12 </ b> C, and the center frame 12 </ b> B of the mesh base material 12 is pressed into a round bar shape, for example. The mesh 14 is stretched three-dimensionally by pushing the member 20 against it. Since the outer peripheral frame 12A and the center frame 12B are concentric, the mesh 14 is extended into a conical shape. At this time, it is desirable to hold the outer peripheral frame 12A of the mesh base material 12 between the jig 16 and a holding member (not shown). In this way, as shown in FIGS. 5 and 6, the coffee and tea extraction filter 10 is three-dimensionally and integrally formed. FIG. 6 is a photograph showing the actual filter.
これにより、図３（Ｂ），図４（Ｂ）に示されるように、メッシュ１４におけるジグザグ状の縦要素１４Ｖが、横要素１４Ｈに互いに連結されたまま伸長するので、開口１４Ｃをパンタグラフ状に拡大させることができる。なお、図３（Ｂ）の構造と、図４（Ｂ）の構造とを比較すると、図３（Ｂ）の構造は、ジグザグの頂点が横要素１４Ｈで連結されているが、図４（Ｂ）の構造は、ジグザグの頂点には横要素１４Ｈが存在していない。従って、図３（Ｂ）の構造の方が、メッシュ１４の強度的に優位である。 As a result, as shown in FIGS. 3B and 4B, the zigzag vertical elements 14V in the mesh 14 extend while being connected to the horizontal elements 14H, so that the opening 14C has a pantograph shape. Can be enlarged. When the structure of FIG. 3B is compared with the structure of FIG. 4B, the structure of FIG. 3B has zigzag vertices connected by horizontal elements 14H. ) Does not have a horizontal element 14H at the top of the zigzag. Therefore, the structure of FIG. 3B is superior in strength of the mesh 14.
このように、本実施形態に係るコーヒー及び茶類抽出用のフィルタの製造方法では、リソグラフィ工程と電鋳工程とを組み合わせることによって、金合金及び／又は純金で構成され、縦要素１４Ｖ及び横要素１４Ｈとが配列されたメッシュ母材１２を容易に製造することができる。 Thus, in the method for manufacturing a filter for extracting coffee and tea according to the present embodiment, the vertical element 14V and the horizontal element are formed of a gold alloy and / or pure gold by combining the lithography process and the electroforming process. The mesh base material 12 in which 14H is arranged can be easily manufactured.
またメッシュ母材１２を立体的に引き延ばし、ジグザグ状の縦要素１４Ｖを伸長させてメッシュ１４の開口１４Ｃを拡大させるので、該開口１４Ｃの大きさの調整が容易である。また、例えば、金合金で製作されたメッシュ母材１２を立体的に引き延ばした後、該貫通孔１２Ｃを純金でコーティングすることにより、開口１４Ｃの大きさを調整してもよい。このようにして、コーヒーや茶を適切に抽出でき、かつその抽出時に金属臭の移りを抑制可能なフィルタ１０を、容易に製造することができる。 Further, since the mesh base material 12 is stretched three-dimensionally and the zigzag vertical element 14V is extended to expand the opening 14C of the mesh 14, the size of the opening 14C can be easily adjusted. For example, the size of the opening 14C may be adjusted by three-dimensionally stretching the mesh base material 12 made of a gold alloy and then coating the through holes 12C with pure gold. In this way, it is possible to easily manufacture the filter 10 that can appropriately extract coffee and tea and can suppress the transfer of the metal odor during the extraction.
（抽出用フィルタ）
このようにして製造されたコーヒー及び茶類抽出用のフィルタ１０（図５）は、金合金及び／又は純金で構成されたメッシュ１４を有している。金合金や純金はイオン化傾向が小さいので、抽出したコーヒーや茶に金属臭が移ることを抑制することができる。またフィルタ１０に付着したコーヒー粉や茶葉は簡単に洗い流すことができ、衛生的である。このことは、図６に写真で示した実物で検証した。更に、見栄えが良好である。
(Filter for extraction)
The coffee and tea extraction filter 10 (FIG. 5) manufactured in this way has a mesh 14 made of a gold alloy and / or pure gold. Since gold alloys and pure gold have a low ionization tendency, it is possible to suppress the transfer of metal odor to extracted coffee or tea. Moreover, the coffee powder and tea leaves adhering to the filter 10 can be easily washed away and are hygienic. This was verified with the real thing shown in the photograph in FIG. Furthermore, it looks good.
またフィルタ１０では、メッシュ１４と、メッシュでない枠の一例たる外周枠１２Ａ、非メッシュ枠１４Ｄ，１４Ｅ、及び中心枠１２Ｂが、立体的かつ一体的に形成されて補強されているので、取扱いが容易である。 In the filter 10, the mesh 14 and the outer peripheral frame 12A, the non-mesh frames 14D and 14E, and the center frame 12B, which are examples of non-mesh frames, are reinforced three-dimensionally and integrally, so that handling is easy. It is.
メッシュ１４の下部は、該メッシュ１４の上部よりも密である。換言すれば、図３（Ｂ），図４（Ｂ）に示される開口１４Ｃが小さい。ここで、下部とは、例えば、中心枠１２Ｂと非メッシュ枠１４Ｄの間の領域、及び非メッシュ枠１４Ｄと非メッシュ枠１４Ｅの間の領域である。また上部とは、例えば、非メッシュ枠１４Ｅと外周枠１２Ａとの間の領域である。 The lower part of the mesh 14 is denser than the upper part of the mesh 14. In other words, the opening 14C shown in FIGS. 3B and 4B is small. Here, the lower part is, for example, a region between the center frame 12B and the non-mesh frame 14D and a region between the non-mesh frame 14D and the non-mesh frame 14E. The upper portion is, for example, a region between the non-mesh frame 14E and the outer peripheral frame 12A.
このように、メッシュ１４の下部を上部より密にすることにより、コーヒーや茶葉抽出の際に、細かい粒子がメッシュ１４から流出することを抑制できる。また、比較的メッシュ１４の上部を比較的粗とする（開口１４Ｃを大きくする）ことにより、抽出速度を向上させることができる。 Thus, by making the lower part of the mesh 14 denser than the upper part, it is possible to prevent fine particles from flowing out of the mesh 14 during coffee or tea leaf extraction. Further, the extraction speed can be improved by making the upper part of the mesh 14 relatively rough (increasing the opening 14C).
本実施形態では、メッシュ１４が３つの領域に区画されているので、該メッシュ１４の粗密（開口１４Ｃの大小）を段階的に変化させることも可能である。また粗密を連続的に変化させることも可能である。 In the present embodiment, since the mesh 14 is partitioned into three regions, the density of the mesh 14 (the size of the opening 14C) can be changed stepwise. It is also possible to change the density continuously.
１０ フィルタ
１２ メッシュ母材
１２Ａ 外周枠
１２Ｂ 中心枠
１２Ｃ 貫通孔
１４ メッシュ
１４Ｃ 開口
１４Ｈ 横要素
１４Ｖ 縦要素
Ｃ 第１方向
Ｄ 第２方向
10 Filter 12 Mesh base material
12A Outer frame
12B Center frame 12C Through-hole 14 Mesh 14C Opening 14H Horizontal element 14V Vertical element C 1st direction D 2nd direction
Claims (1)
前記外周枠に対して前記中心枠を押し込むことで、前記メッシュ母材のメッシュを円錐状に引き延ばし、前記縦要素を伸長させて、隣接する該縦要素同士の間隔を広げて前記メッシュの開口を拡大させるコーヒー及び茶類抽出用のフィルタの製造方法。 A combination of a lithography process using ultraviolet rays or X-rays and an electroforming process, which is composed of a gold alloy or nickel that does not contain nickel, and extends in a zigzag manner in the first direction, and a second element that intersects the first direction. A horizontal element extending in the direction and connecting the vertical elements, and an annular outer peripheral frame and a circular center frame formed concentrically with the outer peripheral frame are integrally formed. Make a mesh base material,
By pushing the center frame against the outer peripheral frame, the mesh of the mesh base material is stretched in a conical shape, the vertical elements are extended, and the gap between the adjacent vertical elements is widened to open the mesh openings. A method for producing a filter for extracting coffee and tea to be expanded.
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| JP2011130282A JP5917837B2 (en) | 2011-06-10 | 2011-06-10 | Filter for extracting coffee and tea, and method for producing the same |
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| JP5917837B2 true JP5917837B2 (en) | 2016-05-18 |
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| WO2016103348A1 (en) * | 2014-12-24 | 2016-06-30 | 株式会社大石アンドアソシエイツ | Metallic coffee filter and coffee extraction device |
| KR101768638B1 (en) * | 2016-02-25 | 2017-08-17 | 이의선 | Apparatus for manufacturing coffee drip bag |
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| JPS4836835B1 (en) * | 1968-03-21 | 1973-11-07 | ||
| NL8104569A (en) * | 1980-10-29 | 1982-05-17 | Maxs Ag | LASTING USABLE COFFEE FILTER. |
| JPS62288390A (en) * | 1986-06-06 | 1987-12-15 | Enami Seiki:Kk | Metal guard and its manufacture |
| JP2891495B2 (en) * | 1990-01-16 | 1999-05-17 | 住金物産株式会社 | Ribulus manufacturing method |
| DK9500170U4 (en) * | 1995-04-28 | 1996-07-28 | Anders Frandsen | tea filter |
| DE60035805T2 (en) * | 2000-06-21 | 2008-04-17 | Nec-Mitsubishi Electric Visual Systems Corp. | BLECH AND METHOD FOR PRODUCING A THREE-DIMENSIONAL STRUCTURE FROM THIS PLATE |
| JP2010274308A (en) * | 2009-05-29 | 2010-12-09 | Kenji Okada | Method for manufacturing expanded metal |
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