JP7248433B2 - Assembled filter for extracting powder - Google Patents

Description

The present invention relates to an assembled filter for extracting powder. More specifically, an assembly that puts coffee, black tea, Japanese tea, etc. in powder form, places it on a cup (mug cup, etc.) that is an existing beverage container, and pours hot water, water, or other liquids into it to extract coffee, etc. It concerns expression filters.

Conventionally, there has been disclosed an assembly type filter composed of a filter portion made of non-woven fabric and having an opening and a sheet-shaped support portion integrally connected to the periphery of the opening (see, for example, Patent Document 1 (claims 1 and 2). , paragraphs [0017], [0018], FIGS. 1 to 3).). In this prefabricated filter, the sheet-shaped support portions are provided along the outer peripheral edge of the opening and partly sandwiching the filter portion in order to form the stand portions on both sides of the filter portion. It has notches and bent portions extending from both ends of the notches to both ends of the sheet-like support. Further, tongue portions are provided at the central portions of both ends of the portion forming the stand portion, and the cut portions are provided 1 mm to 10 mm outside from the peripheral edge of the opening of the sheet-like support portion. Furthermore, the filter portion and the sheet-like support portion are obtained by integral molding.

In the assembly type filter configured in this way, the filter part is formed in the shape of a container, so that it is easy to assemble and can be used simply, and an existing container can be used to extract components such as coffee. Also, the color and amount of the extracted liquid can be observed from the stand part of the assembled filter. Furthermore, since it is made of non-woven fabric, it does not deform even when water or boiling water is poured, and can be washed with water and reused.

Japanese Patent No. 4004142

However, in the assembly type filter shown in the conventional patent document 1, coffee is extracted by pouring hot water into the filter part in a state where the filter part containing, for example, coffee powder is placed on an existing container. Sometimes, since the filter is made of non-woven fabric, the coffee extract permeates from the opening of the filter to the stand through the folded part and turns dark brown, impairing the product value, so there is room for improvement. was there.

A first object of the present invention is to provide an assembly type filter that can prevent discoloration of the stand by preventing the penetration of coffee extract or the like into the stand even when hot water is poured into the filter part, such as coffee powder. An object of the present invention is to provide a filter for extracting powder. A second object of the present invention is to prevent the coffee extract from penetrating only up to the opening of the filter even when powdered material such as coffee is put into the filter and hot water is poured in, causing discoloration of the peripheral edge of the filter and the stand. To provide an assembly-type filter for extracting powdery material which can prevent

A first aspect of the present invention is, as shown in FIGS. 11, a liquid-permeable filter peripheral edge portion 12 integrally connected to the peripheral edge of the opening portion 11a of the filter portion 11, and an existing container integrally connected to the filter peripheral edge portion 12 on both sides of the filter peripheral edge portion 12. 17, and a bending portion 14 that connects the filter peripheral edge portion 12 and the stand portion 13 and is configured to be able to bend the stand portion 13. 4 and along the entire length thereof , a non-permeable portion 16 is formed.
A second aspect of the present invention is an invention based on the first aspect, and further, as shown in FIG. This is an assembly type filter 76 for extracting powdery material.

A third aspect of the present invention is an invention based on the first aspect, and further, as shown in FIG. It is characterized by being a water-repellent treated portion by applying a water-repellent agent.

A fourth aspect of the present invention is an invention based on the first aspect, and further, as shown in FIGS. It is characterized by the formed perforations 14 or strip-shaped thin layer portions.

A fifth aspect of the present invention is an invention based on the first aspect, and further, as shown in FIGS. It consists of a pair of non-permeable parts 36, 36 provided parallel to each other with a space between them, and the bent part is a band-shaped non-woven fabric part 34 formed between the pair of non-permeable parts 36, 36. do.

A sixth aspect of the present invention is an invention based on any one of the first to fifth aspects, and further, as shown in FIGS. An upper piece 13a provided extending along, a tongue-like piece 13b provided in the center of the upper piece 13a in a direction away from the bent portion 14, and separated from the bent portion 14 at both ends of the upper piece 13a. A pair of side pieces 13c, 13c extending in the direction and surrounding both sides of the tongue-shaped piece 13b with a gap therebetween, and connecting the tips of the pair of side pieces 13c, 13c to leave a gap between the tips of the tongue-like piece 13b. It is characterized by having a connecting piece 13d surrounding it.

According to the first aspect of the present invention , the assembly-type filter for extracting powdery material has a non-permeable portion along the bent portion and over the entire length of the bent portion. That is, if the liquid-impermeable portion is formed along the bent portion along the entire length thereof, even if powder such as coffee extract is put into the filter portion and hot water is poured, the coffee extract or the like will not permeate to the stand portion. It is possible to prevent discoloration of the stand part. On the other hand, in the assembly type filter for extracting powdery material according to the second aspect of the present invention, the liquid-impermeable portion is formed along the opening and the bent portion of the filter portion along the entire circumference and the entire length thereof . With this configuration , even if a powder such as coffee is put into the filter and hot water is poured, the coffee extract or the like will permeate only up to the opening of the filter, preventing discoloration of the filter periphery and the stand. can.

In the assembly type filter for extracting powdery matter according to the third aspect of the present invention, the liquid-impermeable portion is a film-forming portion formed by heat-melting the non-woven fabric, or a water-repellent portion formed by coating the non-woven fabric with a water-repellent agent. Therefore, it is possible to reliably prevent coffee extract or the like from permeating from the non-permeable portion to the outside filter peripheral portion and the stand portion.

In the assembly type filter for extracting powdery material according to the fourth aspect of the present invention, the bent portion is a perforation or a band-shaped thin layer portion formed along the connecting portion between the filter peripheral portion and the stand portion, Along the bent portion, the stand portion can be relatively easily bent to a desired angle with respect to the filter peripheral portion and maintained in this state. As a result, when the filter is placed on the existing container, the repulsive elastic force in the direction in which the angle of the stand with respect to the peripheral edge of the filter is larger than a desired angle does not act on the bent portion, so that the filter is placed on the existing container. to prevent the filter from unintentionally falling out of the existing container.

In the assembly type filter for extracting powdery material according to the fifth aspect of the present invention, the folded portion is a band-shaped nonwoven fabric portion formed between the pair of liquid-impermeable portions. A relatively soft band-shaped nonwoven fabric portion is formed between them, and along this band-shaped nonwoven fabric portion, the stand portion can be relatively easily bent at a desired angle with respect to the filter peripheral portion and held in this state. be. As a result, when the filter is placed on the existing container, the elastic force in the direction in which the angle of the stand with respect to the peripheral edge of the filter is larger than a desired angle does not act on the band-shaped nonwoven fabric, so that the filter remains placed on the existing container. It is retained and prevents the filter from unintentionally falling out of the existing container. However, this effect is particularly remarkable when the non-liquid-impermeable portion is a film-forming portion formed by heat melting of the nonwoven fabric.

In the assembly type filter for extracting powdery material according to the sixth aspect of the present invention, the stand portion has the upper piece, the tongue-shaped piece, the pair of side pieces and the connecting piece, so that the stand portion is arranged along the bent portion to filter the filter. When the filter is placed on the existing container after being bent at a desired angle with respect to the peripheral edge, the tongue-shaped piece is positioned inside the existing container and the pair of side pieces and the connecting piece are positioned outside the existing container, The tongue-shaped piece and the connecting piece elastically deform in the direction of gripping the upper edge inner surface and the upper edge outer surface of the existing container. As a result, the filter is securely held on the existing container and is less likely to fall out of the existing container.

1 is a perspective view of a filter and a cup showing a procedure for using the assembly-type filter for extracting powdery material according to the first embodiment of the present invention; FIG. It is the perspective view seen from the A arrow direction of FIG.1(b) which shows the state which mounted the filter on the cup. It is a top view which shows the state before bending the filter in a bending part. 4 is a view in the direction of arrow B in FIG. 3; FIG. 4 is a cross-sectional view taken along line CC of FIG. 3; FIG. FIG. 8 is a cross-sectional view taken along line DD of FIG. 7; FIG. 7 is a cross-sectional view taken along line EE of FIG. 6; FIG. 4 is a plan view corresponding to FIG. 3 showing an assembly type filter for extracting powdery material according to a second embodiment of the present invention; FIG. 9 is a cross-sectional view taken along line FF of FIG. 8; FIG. 7 is a cross-sectional view corresponding to FIG. 6 showing a state in which the filter is placed on the cup; FIG. 4 is a plan view corresponding to FIG. 3 showing an assembly type filter for extracting powdery material according to a third embodiment of the present invention; FIG. 12 is a cross-sectional view taken along line GG of FIG. 11; FIG. 7 is a cross-sectional view corresponding to FIG. 6 showing a state in which the filter is placed on the cup; FIG. 4 is a plan view corresponding to FIG. 3 showing an assembly type filter for extracting powdery material according to a fourth embodiment of the present invention; FIG. 15 is a cross-sectional view taken along line HH of FIG. 14; FIG. 7 is a cross-sectional view corresponding to FIG. 6 showing a state in which the filter is placed on the cup;

Next, the form for implementing this invention is demonstrated based on drawing.

<First embodiment>
As shown in FIG. 1, the assembly type filter for extracting powdery material 10 is made of a non-woven fabric made of thermoplastic synthetic fibers. The nonwoven fabric preferably has a breaking elongation of 50% or more, more preferably 70 to 400%, at a molding temperature (for example, 80 to 230°C). Fibers constituting the non-woven fabric include polyester fibers, polyolefin fibers, polyamide fibers, composite fibers thereof, and copolymer fibers thereof. These short fibers, long fibers, or mixed fibers thereof can be used singly or in combination of two or more to form a nonwoven fabric by a known spunbond method, needle punch method, thermal bond method, or the like. Furthermore, the nonwoven fabric preferably has a basis weight of 50 to 500 g/m ² , more preferably about 100 to 300 g/m ² . Furthermore, the average fiber diameter of the fibers constituting the nonwoven fabric is preferably 0.01 to 20 denier, more preferably 0.5 to 10 denier.

The filter 10 includes a concave liquid-permeable filter portion 11, a liquid-permeable filter peripheral portion 12 integrally connected to the peripheral edge of an opening portion 11a of the filter portion 11, and both sides of the filter peripheral portion 12. A stand portion 13 integrally connected to the filter peripheral edge portion 12 and engaging with the existing container 17 and having liquid permeability, and the filter peripheral edge portion 12 and the stand portion 13 are connected to each other so that the stand portion 13 can be bent. and a folded portion 14 (FIGS. 1-3). The filter portion 11, the filter peripheral edge portion 12, the stand portion 13, and the bent portion 14 are integrally formed of one sheet of thermoplastic synthetic fiber nonwoven fabric (FIGS. 3 to 6).

The filter portion 11 is formed in a concave shape by thermoforming a nonwoven fabric (FIGS. 4 to 7). As a method for thermoforming this nonwoven fabric, there is a method of press-molding this nonwoven fabric with a mold while the nonwoven fabric is heated to a molding processing temperature (eg, 80 to 230 ° C.), ) in which the nonwoven fabric is stretch-molded with this mold in a heated state. Moreover, for the purpose of adjusting the liquid permeability and hydrophilicity of the filter portion 11, the nonwoven fabric may be coated with a resin or the like. As this resin or the like, any material that satisfies the regulations of the Food Sanitation Law can be used. Examples thereof include sucrose, carboxymethylcellulose, sucrose fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, fatty acid esters, silicone resins, and silicone oils. Further, the filter portion 11 is formed in a concave shape whose outer diameter gradually increases upward from the bottom portion. In this embodiment, the filter portion is formed in a bowl shape, but if it is concave, it may be formed in a bottomed cylindrical shape, a bottomed prismatic shape, a conical shape, a truncated cone shape, a pyramid shape, a truncated pyramid shape, or the like. You may

The filter peripheral portion 12 is formed in a rectangular shape from a non-woven fabric, and the concave filter portion 11 is integrally connected to the center thereof (FIGS. 1 to 3). Moreover, the stand part 13 is formed in a rectangular shape from a non-woven fabric, and is integrally connected to both sides of the filter peripheral edge part 12 . Furthermore, the bent portion 14 is provided between the filter peripheral portion 12 and the stand portion 13 so that the stand portion 13 can be bent with respect to the filter peripheral portion 12 at the bent portion 14 . This bent portion 14 is a perforation in this embodiment. By bending the stand portion 13 at the perforations 14 , the stand portion 13 can be held at a desired angle (for example, approximately 90 degrees) with respect to the filter peripheral edge portion 12 .

A characteristic configuration of this embodiment is that a liquid-impermeable portion 16 is formed along the bent portion 14 over the entire length thereof (FIGS. 1(a), 2 and 3). The liquid-impermeable portion 16 is a film-forming portion formed by thermally melting a nonwoven fabric in this embodiment. Specifically, the film-forming portion 16 is formed along the perforation 14 on the side of the filter peripheral portion 12 of the perforation 14 over the entire length thereof. Moreover, the width of the film-forming portion 16 is sufficient as long as liquid such as coffee extract does not permeate through the film-forming portion 16, and is preferably formed to be, for example, about 1 mm to 5 mm. The heating temperature of the nonwoven fabric for forming the film-forming portion 16 should be in the range above the temperature at which the fibers of the nonwoven fabric are melted and adhered to each other to close the gaps, and below the temperature at which the melted fibers do not flow out. set. That is, the heating temperature for forming the film-forming portion 16 is preferably in the temperature range of -10°C to +30°C with respect to the melting point of the thermoplastic resin that is the raw material of the nonwoven fabric. In the present specification, the film-forming portion 16 includes not only a nonwoven fabric that is completely formed into a film by heat melting, but also a nonwoven fabric that is incompletely formed into a film by melting the fibers of the nonwoven fabric and adhering to each other to form a gap. It also includes those that are blocked.

Examples of a heating/pressurizing method for forming the film-forming portion 16 include a hot air method, a hot plate method, an impulse method, a soldering iron method, an ultrasonic method, and the like. As the pressure method, it is preferable to use an impulse type heating/pressurizing method. Here, the impulse-type heating/pressurizing method is a method in which a large current is instantaneously applied to the nichrome wire in a state in which a strip-shaped nichrome wire is pressed against a portion to be formed into a film. In addition, the hot air heating/pressurizing method is a method in which hot air is blown onto the part to be made into a film to heat it and pressurized with a press, roller, etc., and the hot plate type heating/pressurizing method In this method, the film is sandwiched between a pair of heating plates installed above and below, and the portion to be formed into a film is heated and pressurized. Furthermore, the trowel type heating/pressurizing method is a method in which a heating plate called a trowel is brought into contact with the part to be formed into a film, and then pressure is applied with a press or rollers. In this method, ultrasonic energy with a frequency of 20 kHz or more is transmitted as ultrasonic vibration from a resonator called a horn to the part to be formed into a film, thereby generating strong frictional heat, and then applying pressure with a press, roller, or the like.

On the other hand, the stand portion 13 includes an upper piece 13a extending along the perforations 14, a tongue-like piece 13b provided in the center of the upper piece 13a and extending in a direction away from the perforations 14, and an upper piece 13c. It has a pair of side pieces 13c, 13c extending in a direction away from the perforations 14 at both ends of the 13a, and a connection piece 13d connecting the tip portions of the pair of side pieces 13c, 13c (Fig. 1(a)). and FIG. 3). The upper piece 13a extends along the perforations 14 in this embodiment. The pair of side pieces 13c, 13c are provided so as to surround both sides of the tongue-shaped piece 13b with a space therebetween, and the connection piece 13d is provided so as to surround the tip of the tongue-shaped piece 13b with a space therebetween.

A method of manufacturing the assembly type filter for extracting powdery material 10 configured in this way will be described. First, a sheet-shaped nonwoven fabric wound on a roll is unwound from the roll, and the unwoven fabric is press-molded with a mold in a state where the unwound nonwoven fabric is heated to a molding processing temperature (for example, 80 to 230 ° C.), or While the mold is heated to a molding temperature (for example, 80 to 230° C.), the drawn out nonwoven fabric is stretch-molded in the mold to form the concave filter portion 11 (filter portion molding step). Next, the nonwoven fabric having the concave filter portion 11 formed thereon is punched into a predetermined shape (punching step). Thereby, the filter portion 11, the filter peripheral edge portion 12 and the pair of stand portions 13, 13 are integrally formed. At this time, a perforation 14 is also formed between the filter peripheral portion 12 and the stand portion 13 at the same time. Furthermore, along the perforations 14 on the side of the filter peripheral edge 12 of the perforations 14, along the perforations 14 and with a predetermined width over the entire length, the nonwoven fabric is thermally melted by an impulse type heating and pressurization method to form a film 16 ( filming process). The filter 10 can be manufactured by such a relatively simple process.

A method of using the assembly type powdery substance extraction filter 10 manufactured in this way will be described. First, a pair of stand portions 13, 13 are bent along a pair of perforations 14, 14 along the outer peripheral surface of the filter portion 11 with a space therebetween. At this time, if the stand portion 13 is bent at a desired angle (for example, about 90 degrees) with respect to the filter peripheral portion 12, the perforations 14 are less likely to rebound, that is, more likely to be plastically deformed. 14, the stand portion 13 can be relatively easily bent to a desired angle with respect to the filter peripheral edge portion 12 and maintained in this state. Next, the filter 10 is placed on the cup 17 . At this time, as shown in FIGS. 2 and 6, the tongue-shaped piece 13b of the stand portion 13 is positioned inside the cup 17, and the pair of side pieces 13c, 13c and the connecting piece 13d are positioned outside the cup 17. When the filter 10 is placed on the cup 17, the tongue-shaped piece 13b and the connecting piece 13d are elastically deformed in the direction of gripping the inner surface and the outer surface of the upper edge of the cup 17. As shown in FIG. As a result, the filter 10 is reliably held on the cup 17 and is less likely to fall off the cup 17 . In addition, since the perforation 14 is not elastic in the direction in which the angle of the stand portion 13 with respect to the filter peripheral portion 12 becomes larger than the desired angle, the filter 10 is held on the cup 17 and the filter 10 is held on the cup 17 . Prevents accidental falls from

Next, a predetermined amount of powder such as coffee, black tea, Japanese tea, etc. is put into the filter part 11 . Further, a liquid such as hot water or water is poured into the filter portion 11 . At this time, since the filter portion 11 is formed by thermoforming a non-woven fabric, it is possible to ensure the retention time of the liquid such as hot water or water poured into the filter portion 11 . Moreover, even if a liquid such as hot water or cold water is poured, the filter portion 11 will not be deformed, and the powder in the liquid will not pass through the filter portion 11 . Then, the coffee extract or the like extracted from the powder in the filter portion 11 passes through the filter portion 11 and drips into the cup. Furthermore, since the film-forming portion 16 is formed along the perforation 14 and over its entire length, the coffee extract or the like permeates up to the filter peripheral portion 12, but the coffee extract or the like that has permeated the filter peripheral portion 12 does not reach the film-forming portion 16. , and does not permeate to the stand portion 13. As a result, discoloration of the stand portion 13 due to coffee extract or the like can be prevented.

<Second Embodiment>
8 to 10 show a second embodiment of the invention. 8 to 10, the same reference numerals as in FIGS. 3, 4 and 6 denote the same parts. In this embodiment, the liquid-impermeable portion is composed of a pair of liquid-impermeable portions 36, 36 provided parallel to each other with a gap on both sides of the connection portion between the filter peripheral portion 12 and the stand portion 13. As shown in FIG. Specifically, the non-permeable portion is formed on both sides of a connection portion between one end of the filter peripheral edge portion 12 and one stand portion 13, that is, between one end side of the filter peripheral edge portion 12 and one stand portion 13 side of the connecting portion. A pair of non-permeable portions 36, 36 provided parallel to each other with a gap on both sides, and both sides of the connection portion between the other end of the filter peripheral portion 12 and the other stand portion 13, that is, the other end of the filter peripheral portion 12 It consists of a pair of non-permeable parts 36, 36 which are provided parallel to each other with a gap on both sides of the connecting part on the side and the other stand part 13 side. The bent portion is formed in a belt shape between a pair of liquid-impermeable portions 36, 36 provided parallel to each other with a gap on both sides of the connecting portion between one end of the filter peripheral portion 12 and one stand portion 13. A band-like shape formed between a pair of liquid impermeable portions 36, 36 provided parallel to each other with a space between both sides of the connecting portion between the nonwoven fabric portion 34 and the other end of the filter peripheral portion 12 and the other stand portion 13. and a nonwoven fabric portion 34 . The non-permeable portion 36 is formed of a film portion in this embodiment. This filmed portion 36 is formed in the same manner as the filmed portion of the first embodiment. The band-shaped nonwoven fabric portion 34 is not made into a film and is still in the state of nonwoven fabric, and the thickness of the pair of liquid-impermeable portions 36, 36 is equal to the thickness of the band-shaped nonwoven fabric portion 34, as shown in detail in the enlarged view of FIG. It is formed thinner than the thickness. Moreover, it is preferable that the width of the band-shaped nonwoven fabric portion 34 is formed within a range of 0.5 mm to 2 mm. Here, the reason why the width of the band-shaped non-woven fabric portion 34 is limited to within the range of 0.5 mm to 2 mm is that if it is less than 0.5 mm, the width of the band-shaped non-woven fabric portion 34 becomes too narrow and is easily cut when bent at a desired angle. In some cases, it may be difficult to achieve the processing accuracy of pressurization with a nichrome wire in the impulse type heating and pressurization method. This is because the directional elastic force acts on the band-shaped nonwoven fabric portion 34 and it may become difficult for the filter 30 to be placed on the cup 17 stably. Furthermore, in this embodiment, the perforations of the first embodiment are not formed. Except for the above, the configuration is the same as that of the first embodiment.

In the assembly-type powdery material extraction filter 30 configured in this way, the belt-shaped nonwoven fabric portion 34, which is relatively soft, is formed between the pair of film-forming portions 36, 36, which are relatively hard. The stand portion 13 can be relatively easily bent to a desired angle along the portion 34 with respect to the filter peripheral edge portion 12 and maintained in this state. As a result, when the filter 30 is placed on the cup 17, the elastic force in the direction in which the angle of the stand portion 13 with respect to the filter peripheral edge portion 12 becomes larger than a desired angle does not act on the band-shaped nonwoven fabric portion 34. The filter 30 is held on the cup 17 to prevent the filter 30 from accidentally falling out of the cup 17.例文帳に追加Since operations other than the above are substantially the same as those of the first embodiment, repeated description will be omitted.

<Third Embodiment>
11 to 13 show a third embodiment of the invention. 11 to 13, the same reference numerals as in FIGS. 3, 4 and 6 denote the same parts. In this embodiment, the bent portion is a strip-shaped thin layer portion 54 formed along the connecting portion between the filter peripheral edge portion 12 and the stand portion 13 . The band-shaped thin layer portion 54 is formed over the entire length of the film-forming portion 56, which is a non-permeable portion, at the center in the width direction. Specifically, a ridge having a shape corresponding to the strip-like thin layer portion 54 is formed at the widthwise center of the strip-like nichrome wire used in the impulse-type heating/pressing method for forming the film-forming portion 56 . It is formed. Then, while the nichrome wire is pressed against the portion to be filmed, a large current is instantaneously applied to the nichrome wire, thereby simultaneously forming the filmed portion 56 and the band-shaped thin layer portion 54 . The strip-shaped thin layer portion 54 is formed into a film in the same manner as the film-forming portion 56, and the thickness of the strip-shaped thin-layer portion 54 is formed thinner than the thickness of the film forming portion 56, as shown in detail in the enlarged view of FIG. Moreover, it is preferable that the width of the belt-shaped thin layer portion 54 is formed within a range of 0.5 mm to 2 mm. Here, the reason why the width of the strip-shaped thin layer portion 54 is limited to the range of 0.5 mm to 2 mm is that if the width is less than 0.5 mm, the width of the strip-shaped thin layer portion 54 becomes too narrow, so that when it is bent at a desired angle, the width of the strip-shaped thin layer portion 54 becomes too narrow. In some cases, it may be easy to cut or it may be difficult to obtain processing accuracy for pressurization by the above-mentioned nichrome wire. This is because the filter 30 may become difficult to stably rest on the cup 17 due to the action on the thin layer portion 54 . Furthermore, in this embodiment, the perforations of the first embodiment are not formed. Except for the above, the configuration is the same as that of the first embodiment.

In the assembly type powdery substance extraction filter 50 configured in this way, the stand portion 13 can be relatively easily set at a desired angle with respect to the filter peripheral edge portion 12 along the band-shaped thin layer portion 54 that is thinner than the film forming portion 56 . It can be folded and held in this state. As a result, when the filter 50 is placed on the cup 17, the elastic force in the direction in which the angle of the stand portion 13 with respect to the filter peripheral edge portion 12 becomes larger than a desired angle does not act on the belt-like thin layer portion 54, so that the filter 50 is placed on the cup. 17 to prevent the filter 50 from accidentally falling out of the cup 17.例文帳に追加Since operations other than the above are substantially the same as those of the first embodiment, repeated description will be omitted.

<Fourth Embodiment>
14 to 16 show a fourth embodiment of the invention. 14 to 16, the same reference numerals as in FIGS. 3, 4 and 6 denote the same parts. In this embodiment, a liquid impermeable portion 76 is formed along the opening portion 11a of the filter portion 11 and over the entire circumference thereof. Specifically, in this embodiment, the non-permeable portion consists of a film portion 76 formed in a ring shape on the inner peripheral edge of the filter peripheral edge portion 12 . The film-forming portion 76 is formed by applying a large current to the nichrome wire in a state where a ring plate-shaped nichrome wire is pressed against the portion to be film-formed, thereby forming the ring-shaped film-forming portion 76. . Since operations other than the above are substantially the same as those of the first embodiment, repeated description will be omitted.

In the assembly-type powdery substance extraction filter 70 configured as described above, since the film forming portion 76 is formed along the entire circumference of the opening 11a of the filter portion 11, the powdery substance such as coffee can be extracted from the filter portion 11. Even if hot water is poured into the filter portion 11, coffee extract or the like permeates only up to the opening portion 11a of the filter portion 11, thereby preventing discoloration of the filter peripheral portion 12 and the stand portion 13. - 特許庁Since operations other than the above are substantially the same as those of the first embodiment, repeated description will be omitted.

In the above-described first to fourth embodiments, the liquid-impermeable portion is a film-forming portion formed by thermally melting the non-woven fabric, but the liquid-impermeable portion is a water-repellent treated portion obtained by applying a water-repellent agent to the non-woven fabric. may be In this case, examples of the water repellent include fluorine resin, silicone resin, acrylic resin, urethane resin, and wax. Further, in the first to third embodiments described above, linear non-permeable portions formed along the entire length of the bent portion are mentioned, and in the fourth embodiment described above, the opening of the filter portion Although the ring-shaped liquid-impermeable part formed along the entire circumference of the The liquid impermeable part may have both ring-shaped liquid impermeable parts formed over the entire length.

Next, examples of the present invention will be described in detail together with comparative examples.

<Example 1>
As shown in FIGS. 8 and 9, an assembly type filter 30 for extracting powdery material was manufactured by integrally molding nonwoven fabrics with the following nonwoven fabrics and dimensions. As the nonwoven fabric, a polyester nonwoven fabric (basis weight: 250 g/m ² , average fineness: 3 denier, melting point: 255°C) obtained by a known spunbond method was used. The integral molding was performed by heating a bowl-shaped mold having an upper diameter of 65 mm and a depth of 43 mm, respectively, of the filter portion 11 to a temperature of 140° C. to carry out hot press molding. The length and width of the filter peripheral portion 12 were 75 mm and 85 mm, respectively, the diameter of the opening 11a of the filter portion 11 was 65 mm, and the depth of the filter portion 11 was 43 mm. The length of the bent portion 34 was 85 mm, and the distance between the pair of bent portions 34, 34 was 75 mm. Furthermore, the height of the stand portion 13 was 45 mm, and the height and width of the tongue-shaped piece 13b were 15 mm and 16 mm, respectively.

On the other hand, the non-permeable portion consists of a pair of film forming portions 36, 36 provided parallel to each other with a space on both sides of the connecting portion between the filter peripheral portion 12 and the stand portion 13, and the bent portion consists of a pair of It was the strip-shaped nonwoven fabric portion 34 formed between the film-forming portions 36 , 36 . The width of the pair of film-forming portions 36, 36 was 4 mm, and the width of the band-shaped nonwoven fabric portion 34 was 1 mm. Furthermore, the pair of film forming portions 36, 36 were formed as follows. A desktop electric sealer FA-450-5W (100 V, 1.3 kW) manufactured by Fuji Impulse Co., Ltd. was used to form the film-formed portion 36 by an impulse heating/pressurizing method. The molding conditions at this time were that the heating time was 9 seconds, the cooling time was 7 seconds, and the heating temperature of the film-formed portion was 268°C. The heating is performed by applying a current of 13 A for 9 seconds while the strip-shaped nichrome wire is pressed against the nonwoven fabric, and the cooling is performed by pressing the strip-shaped nichrome wire against the nonwoven fabric for 7 seconds after stopping the energization. It was carried out by leaving it in place. Three filters 30 were produced in this way. These filters 30 are referred to as Example 1.

<Test 1>
A pair of stand portions of the filter of Example 1 was bent at about 90 degrees and set in a cup (diameter 80 mm). The rest of the filters were also set in the cup in the same manner as above to extract coffee.

<Evaluation>
When hot water was poured into the regular coffee powder inside the filter, the filter did not wobble, and stable extraction was possible. A relatively soft band-shaped nonwoven fabric portion (folded portion) is formed between a pair of relatively hard film-formed portions (liquid-impermeable portions), and along this band-shaped nonwoven fabric portion, the stand portion is attached to the periphery of the filter. This is because it could be bent at a desired angle with relative ease. In addition, although the coffee extract in the filter penetrated to the periphery of the filter, the coffee extract did not penetrate to the stand, thereby preventing discoloration of the stand. This is because the coffee extract was blocked by the film-forming portion (liquid-impermeable portion).

REFERENCE SIGNS LIST 10, 30, 50, 70 Assembled filter for extracting powder 11 Filter part 11a Opening part 12 Filter peripheral part 13 Stand part 13a Upper piece 13b Tongue piece 13c Side piece 13d Connecting piece 14 Perforation (bent part)
16, 36, 56, 76 Film forming part (liquid impermeable part)
17 cups (existing container)
34 belt-like nonwoven fabric part 54 belt-like thin layer part

Claims (6)

A prefabricated filter for extracting powdery material made of nonwoven fabric made of thermoplastic synthetic fibers,
a concave liquid-permeable filter portion; a liquid-permeable filter peripheral portion integrally connected to the peripheral edge of the opening of the filter portion; a liquid-permeable stand portion connected to and engaged with an existing container; and a bending portion connecting the filter peripheral portion and the stand portion and capable of bending the stand portion,
A prefabricated filter for extracting powdery material, characterized in that a non-permeable portion is formed along the entire length of the bent portion. 2. The assembly type filter for extracting powdery material according to claim 1, wherein a non-permeable portion is formed along the opening of said filter portion and along the entire periphery thereof. 3. The assembly type filter for extracting powdery material according to claim 1 , wherein said non-liquid-permeable portion is a film-formed portion formed by heat-melting a non-woven fabric, or a water-repellent portion formed by coating a non-woven fabric with a water-repellent agent. 2. The assembly type filter for extracting powdery material according to claim 1 , wherein said bent portion is a perforation or a belt-like thin layer portion formed along a connecting portion between said filter peripheral edge portion and said stand portion. The liquid-impermeable part comprises a pair of liquid-impermeable parts provided parallel to each other with a gap on both sides of the connecting portion between the filter peripheral edge part and the stand part, and the bent part is formed by the pair of liquid-impermeable parts. 2. A prefabricated filter for extracting powder according to claim 1 , which is a band-shaped nonwoven fabric part formed between the parts. The stand portion includes an upper piece extending along the bent portion, a tongue-shaped piece provided in the center of the upper piece and extending in a direction away from the bent portion, and the upper piece. A pair of side pieces are provided at both ends in a direction away from the bent portion and surround both sides of the tongue-shaped piece with a gap therebetween; 6. The assembly type filter for extracting powdery material according to any one of claims 1 to 5 , further comprising a connection piece surrounding the filter with a space therebetween.

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