Dripper and its manufacturing method

Abstract

To provide a dripper retaining a stable state and a filter state and facilitating opening and folding, and manufacturing method of the dripper.SOLUTION: A dripper 1 includes a bag-shaped filter, and a cylindrical support 3 formed foldably in a state where the filter is located inside thereof. A folding line L forming a fold M when the support 3 is in a folded state, is formed of cut parts C1-C5 and uncut parts U1-U6, and an opening of the filter is peelably closed by ultrasonic seal from an outer surface of the support 3.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a dripper and a manufacturing method thereof, and more particularly to a dripper in which contents having components to be extracted (e.g., regular coffee powder, black tea leaves, green tea leaves, etc.) are previously stored and a manufacturing method thereof. [Background technology]

[0002] Disposable coffee drippers have been known that are made up of a bag-shaped filter in which regular coffee powder is enclosed and a cylindrical support (sleeve-shaped mount) for placing the filter on a cup. The support is often made into a cylindrical shape by gluing both ends of cardboard together, and before use, the support is folded with a nonwoven fabric filter attached to the inside. When brewing coffee, the filter is opened and the support is changed from a folded state to an open cylindrical state, and the dripper is then placed on the cup. When hot water is poured into the filter, the extracted coffee passes through the filter and accumulates in the cup.

[0003] When pouring hot water into the filter, the dripper may tilt or fall over if care is not taken. In order to avoid this, Patent Documents 1 to 3 propose drippers that can be stably placed on a cup. In addition, as described in Patent Document 3, by performing ultrasonic sealing via a support, it is also possible to close the opening of the filter in a peelable manner with stable sealing strength. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-24763 A [Patent Document 2] JP 2004-195198 A [Patent Document 3] JP 2004-711 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the supports described in Patent Documents 1 to 3 do not take into consideration easy opening and folding. Thick specifications are often adopted for the supports because of their nature of stabilizing the shape of the dripper. When a thick support is opened from a folded state against its elastic force, there is a risk that the regular coffee powder in the filter will scatter. In the filling and sealing process when manufacturing a dripper, the thickness of the support can lead to a decrease in production efficiency. In addition, when the opening of the filter is closed by ultrasonic sealing, ultrasonic sealing treatment is performed on the inner filter from the outside of the support, but if the support is thick, it is difficult to make the support and the filter adhere to each other, and stable seal strength cannot be obtained.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dripper that maintains a stable shape and filter state, and is easy to open and fold, and a manufacturing method thereof. [Means for solving the problem]

[0007] In order to achieve the above object, a dripper according to a first aspect of the present invention is a dripper having a bag-shaped filter in which a content having a component to be extracted is enclosed, and a cylindrical support formed so as to be foldable with the filter located therein, A folding line that forms a crease when the support is in a folded state is composed of a cut portion and a non-cut portion, The opening of the filter is peelably closed by ultrasonic sealing from the outer surface of the support.

[0008] The dripper of the second invention is characterized in that, in the above-mentioned first invention, the sealing area that peelably closes the opening of the filter is located within the range of the non-cut portion and does not overlap with the cut portion.

[0009] The dripper of the third invention is characterized in that, in the above-mentioned first or second invention, a plurality of the non-cut portions are formed, and among the plurality of non-cut portions, relatively long non-cut portions are located closer to the opening of the filter than the cut portions.

[0010] The dripper of a fourth invention is characterized in that in any one of the above first to third inventions, the support has a polyethylene layer on the inner surface.

[0011] The dripper of the fifth invention is characterized in that, in any one of the first to fourth inventions above, the support has a V-shaped notch and a fan-shaped hole, and when the left and right folds of the support in a folded state are pressed in a direction toward each other, an approximately S-shaped outer contour is created along the notch and the hole, and the opening of the cylindrical support is formed into an approximately hexagon.

[0012] The sixth aspect of the present invention is a method for producing a dripper according to any one of the first to fifth aspects of the present invention, The support is made of a folded blank plate, Applying an adhesive to the overlapping portion formed by overlapping both ends of the blank plate, and forming a cylindrical support by the adhesion; The filter is provided within the support; Place the contents in the filter; The opening of the filter is peelably closed by ultrasonically sealing the outer surface of the support. Effect of the Invention

[0013] According to the present invention, the folding line that forms the crease when the support is in a folded state is composed of a cut portion and a non-cut portion, so that folding for opening and folding can be easily performed. Since folding when opening the filter is easy, it is possible to prevent the contents from scattering. In addition, since folding in the filling and sealing process is easy, it is possible to improve production efficiency, and it is also possible to obtain stable seal strength at the filter opening due to sufficient adhesion between the support and the filter. Therefore, it is possible to realize a dripper that maintains a stable shape and filter state and is easy to open and fold. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a rear view showing the embodiment of the dripper in an unopened state. [Diagram 2] FIG. 2 is a perspective view showing the dripper of FIG. 1 in an opened state. [Diagram 3] FIG. 2 is a plan view showing a blank plate of a support constituting the dripper of FIG. 1. [Figure 4] FIG. 2 is a schematic diagram showing ultrasonic sealing processing in the dripper of FIG. 1. [Diagram 5] FIG. 2 is a front view showing a specific example of the positional relationship between a sealing area and an adhesive area in the dripper of FIG. 1. [Figure 6] 1A to 1C are cross-sectional views of essential parts that typically show specific examples of two types of supports having different laminate structures. [Figure 7] FIG. 2 is a cross-sectional view showing a dripper in which a filter is temporarily attached to one side of a support. [Figure 8] FIG. 4 is a plan view showing the arrangement of cut and non-cut portions that form the folding lines of the blank plate. [Figure 9] FIG. 2 is a front view showing the dripper in an upright position, revealing its roughly S-shaped outer shell. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, a dripper and the like according to an embodiment of the present invention will be described with reference to the drawings. Note that the same or corresponding parts in each specific example will be denoted by the same reference numerals, and duplicated explanations will be omitted as appropriate.

[0016] FIG. 1 shows the appearance of the dripper 1 before opening (with the support 3 folded), and FIG. 2 shows the appearance of the dripper 1 after opening (with the support 3 in a cylindrical open state). FIG. 1 is a rear view of the dripper 1, and FIG. 2 is a rear perspective view of the dripper 1 set on a cup 17. The dripper 1 has a double structure including a bag-shaped filter 2 in which a content 18 (FIG. 2) having an extractable component is enclosed, and a cylindrical support (sleeve-shaped mount) 3 formed so as to be foldable with the filter 2 located inside. The dripper 1 is suitable for carrying because the support 3 is foldable, and is suitable for disposable use because it has a simple structure that can be constructed from materials that are easily discarded. In other words, it has the advantage that, while being a portable disposable type, it can easily brew, for example, drip coffee.

[0017] Contents 18 (FIG. 2; for example, regular coffee powder, black tea leaves, green tea leaves, etc.) having the components to be extracted are sealed in advance in bag-shaped filter 2. And, to prevent contents 18 from spilling out of filter 2 before using dripper 1, opening 9a of filter 2 is peelably closed by ultrasonic sealing via support 3. Sealing area 24 by ultrasonic sealing is shown in FIG. 1.

[0018] As the material for the filter 2, in consideration of the workability when forming it into a bag, it is preferable to use a sheet material having thermal adhesiveness as a raw material, a sheet material having thermal adhesiveness on one side (the innermost layer when formed into a bag), etc. Examples include water-permeable nonwoven fabric made of polyolefin-based (polyethylene, polypropylene, etc.), polyester-based materials, etc., and multi-layered filter paper containing thermoplastic resin such as polyolefin-based (polyethylene, polypropylene, etc.), polyester-based, etc. on one side (the innermost layer when formed into a bag). The processing into a bag is performed by overlapping the sheet material by folding it in half or gusset folding, heat bonding it into a predetermined shape, and cutting and punching it out.

[0019] The cylindrical support 3 allows the filter 2 to be set on the cup 17 (FIG. 2) while maintaining a predetermined shape. As shown in FIG. 2, the support 3 has a first opening 7 constituting one opening 7a and a second opening 8 constituting the other opening 8a. A filter opening 9 is attached to the first opening 7 so that the filter 2 opens when the support 3 is changed from the folded state (FIG. 1) to the cylindrical open state (FIG. 2). The filter 2 is attached by inserting the filter 2 into the support 3, folding back a part of the filter opening 9 to the outside at the edge of the first opening 7 of the support 3, and attaching the folded back part to the outer surface of the support 3. When the filter 2 is attached in this manner, when the support 3 is opened to the cylindrical state during use, the filter 2 opens wide and becomes suitable for pouring hot water or dripping.

[0020] The support 3 is formed by folding and gluing one blank plate 3A shown in Fig. 3. Fig. 3 is a development of the support 3, and the blank plate 3A is formed by punching a plate-shaped sheet material as shown in the development (Fig. 3). The material of the blank plate 3A is not particularly limited, but for example, thick paper such as waterproof card paper or ivory paper, or thick paper coated with resin (polyethylene, etc.) on both sides (particularly the inner surface of the support 3) can be used as the sheet material. Note that if the blank plate 3A is made of thick paper coated with resin, it is possible to prevent a decrease in rigidity of the support 3 even if hot water or steam is splashed on it.

[0021] The support 3 preferably has a polyethylene layer on its inner surface, and more preferably has polyethylene layers on its inner and outer surfaces. When a polyethylene layer is disposed on the inner surface of the support 3, the blank plate 3A is required to have a polyethylene layer on at least one surface. Therefore, for the blank plate 3A, it is preferable to use a sheet material of cardboard (waterproof cardboard, ivory paper, etc.) with polyethylene applied on at least one surface, and more preferably to use a sheet material of cardboard with polyethylene applied on both surfaces.

[0022] FIG. 6 shows two examples of supports 3 with different laminated structures. FIG. 6(A) shows a cross-sectional structure of a main part of a support 3 made of a double-sided coated blank plate 3A, and FIG. 6(B) shows a cross-sectional structure of a main part of a support 3 made of a single-sided coated blank plate 3A. The support 3 shown in FIG. 6(A) has a three-layer laminated structure consisting of a paper layer P0, a polyethylene layer P1 formed on the inner surface of the paper layer P0, and a polyethylene layer P2 formed on the outer surface of the paper layer P0. The support 3 shown in FIG. 6(B) has a two-layer laminated structure consisting of a paper layer P0 and a polyethylene layer P1 formed on the inner surface of the paper layer P0.

[0023] Both of the supports 3 in Fig. 6(A) and (B) have a polyethylene layer P1 on at least the inner surface, so that ultrasonic sealing from the outer surface of the support 3 allows the inner surface of the support 3 and the outer surface of the filter 2 to be peelably bonded in a short time. In other words, the polyethylene layer P1 functions as an adhesive layer. The bonded state of the polyethylene layer P1 allows the support 3 to suppress the movement of the filter 2 during transportation, etc., so that it is possible to prevent the filter 2 from coming off or breaking due to the movement of the filter 2. Furthermore, even if the support 3 is splashed with steam, boiling water, coffee, etc., the water resistance of the polyethylene layer P1 prevents the rigidity of the support 3 from decreasing.

[0024] Furthermore, since the support 3 shown in FIG. 6(A) also has a polyethylene layer P2 on the outer surface, the water resistance of the polyethylene layer P2 can more effectively prevent the rigidity of the support 3 from decreasing.

[0025] The blank plate 3A (FIG. 3) is composed of three parts, namely, a front plate 4, a rear plate 5, and a glue strip 6, with a folding line L as a boundary. Specific examples of the folding line L include a lead crease, a pressed crease, a cut crease, a sewing line, and the like. FIG. 8 shows an example of the folding line L composed of a sewing line (perforation). The folding line L is composed of a plurality of cut portions C1 to C5 and a plurality of non-cut portions U1 to U6, and is formed symmetrically above and below as a whole. The cut portions C1 to C5 are formed to be the same size by a cutting edge. Furthermore, the non-cut portions U1 and U6 are formed to be the same size, and the non-cut portions U2 to U5 are formed to be the same size. The non-cut portions U1, U6 are longer than the non-cut portions U2 to U5, and the relatively longer non-cut portion U1 of the non-cut portions U1 to U6 is located closer to the opening 9a (FIG. 2) of the filter 2 (i.e., closer to the opening 7a of the first opening 7) than the cut portions C1 to C5. The sealing area 24 (FIG. 1) that peelably closes the opening 9a of the filter 2 is located within the range of the non-cut portion U1 and is located so as not to overlap any of the cut portions C1 to C5.

[0026] A T-shaped notch 14, a V-shaped cutout 15, a sector-shaped hole 16, and a recess N are provided symmetrically on the front panel 4 and the rear panel 5 (FIG. 3). The notch 14 is located in a portion corresponding to the second opening 8 (FIGS. 1 and 2) of the support 3, the cutout 15 is located in a portion corresponding to the first opening 7 (FIGS. 1 and 2) of the support 3, and the hole 16 is located midway between the portions corresponding to the first and second openings 7 and 8. When the filter 2 is attached to the support 3, the filter 2 is pressed through the hole 16, thereby effectively preventing the filter 2 from being displaced relative to the support 3.

[0027] As shown in Fig. 3, a plurality of protrusions 11 and legs 13 are formed in the portion of the support 3 corresponding to the second opening 8 (Figs. 1 and 2). That is, protrusions 11 are formed at the positions of each folding line L and its bonding position (overlapping portion 20 in Figs. 1 and 2), and legs 13 are formed midway between the positions of the two folding lines L. Two legs 13 are formed by the same cut 14, and a recess N is formed on the protrusion 11 side of each leg 13. The combination of the recess N and the cut 14 reduces the waste of sheet material when forming the blank plate 3A, and the legs 13 are formed in a shape bent toward the second opening 8 side of the support 3.

[0028] When assembling the support body 3, first, the blank plate 3A is folded along the folding line L at the boundary between the front plate 4 and the rear plate 5 so that the front plate 4 and the rear plate 5 overlap. Next, the blank plate 3A is folded along the folding line L at the boundary between the front plate 4 and the adhesive strip 6 so that the adhesive strip 6 overlaps the rear plate 5. When the adhesive strip 6 is attached to the rear plate 5 in this state, the blank plate 3A becomes cylindrical, and the support body 3 in the folded state is obtained. The adhesive strip 6 is attached to the rear plate 5 by applying an adhesive (e.g., a hot melt adhesive) to three adhesion areas 22 (FIG. 1) in the overlapping portion 20 formed by overlapping both ends of the blank plate 3A.

[0029] The filter 2 is provided inside the support 3 formed into a cylindrical shape as described above. As described above, the filter 2 is attached to the support 3 by inserting the filter 2 into the support 3, folding back a part of the filter opening 9 outward at the edge of the first opening 7 of the support 3, and attaching the folded back part to the outer surface of the support 3 with an adhesive (for example, a hot melt adhesive) (two points on the upper end of the support 3).

[0030] By folding the blank plate 3A along each folding line L, creases M (FIGS. 1 and 2) are formed at the positions of the folding lines L. When the left and right creases M of the folded support 3 (FIG. 1) are pressed in a direction in which they approach each other, the flat tubular portion stands up to have a substantially rectangular parallelepiped shape. FIG. 9 shows the dripper 1 when it is thus stood up as viewed from the front panel 4 side. When the support 3 is stood up to have a substantially rectangular parallelepiped shape, force is concentrated at the lower end of the notch 15 and the upper and lower ends of the hole 16 at the corners extending in the vertical direction, and a substantially S-shaped outline G (shown by a dashed line a little away from the outline position) along the notch 15, the crease 19, and the hole 16 is easily formed in two places on each of the front panel 4 and the back panel 5. In other words, when dripper 1 is in an upright position, a roughly S-shaped outline G can be recognized when viewed from the front side of notch 15 including diagonal outline portion 15a at the center of front panel 4, fold 19 formed in a roughly straight line extending outward from the bottom end of notch 15 to the top end of sector-shaped hole 16, and arc-shaped outline portion 16a connecting the top and bottom ends of sector-shaped hole 16.

[0031] By configuring the blank plate 3A so that the outline G is formed in a substantially S-shape as described above, the blank plate 3A can be easily folded. This folding forms diagonal corners at the positions of the folds M (FIGS. 1 and 2), forming substantially hexagonal openings 7a, 8a at the first opening 7 and the second opening 8 of the support 3. Then, as the support 3 enters a cylindrical open state (FIG. 2), a substantially hexagonal opening 9a is also formed at the filter opening 9. In this way, the shape of the dripper 1 is stabilized, so that the dripper 1 can be stably placed on the cup 17. In order to increase the capacity of the dripper 1, it is preferable to gusset the bottom of the filter 2.

[0032] In the second opening 8 of the support 3 assembled as described above, a pair of protrusions 11 facing each other across the opening 8a and two pairs of legs 13 facing each other across the opening 8a are formed. When the support 3 is opened into a cylindrical shape by folding the blank plate 3A along the folding line L, the protrusions 11 and the legs 13 are arranged at predetermined positions in the second opening 8. That is, the protrusions 11 are provided at the folding positions (positions where the creases M are formed) on both sides in the folded state of the support 3 (FIG. 1), and the legs 13 are provided between the two protrusions 11. Since the protrusions 11 and the legs 13 are arranged in a well-balanced manner in the second opening 8 of the support 3, the dripper 1 has a low center of gravity overall and is stabilized.

[0033] Contents 18 are placed into filter 2 through opening 9a, and ultrasonic sealing is performed via support 3 outside of the range 22 of adhesive bonding at overlapping portion 20 to peelably close opening 9a of filter 2, thereby obtaining dripper 1 (FIG. 1) in an unopened state. This bonding that peelably closes opening 9a of filter 2 is a temporary bonding that is performed until filter 2 is opened when dripper 1 is used.

[0034] 4(A) is a plan view, and FIG. 4(B) is a front view (the ultrasonic sealing device is not shown) that shows a schematic diagram of an ultrasonic sealing process being performed on the filter 2 using an ultrasonic sealing device. The ultrasonic sealing is performed using an ultrasonic sealing device that includes an ultrasonic horn (sealing bar) 31 that applies ultrasonic vibration energy to the filter 2, and an anvil (receiving jig) 32 that positions the filter 2.

[0035] For example, it is preferable to use an ultrasonic horn 31 or anvil 32 with staggered micro-projections on its surface, and fill and seal the container so that the micro-projections come into contact with the back side of the support 3 (the side where the overlapping portion 20 is located). In this way, ultrasonic sealing can be performed without damaging the front panel 4 side (the side facing the packaging) of the support 3. Since no traces of the ultrasonic seal remain on the front panel 4, the front panel 4 can be kept in a beautiful condition, and it is possible to achieve both the appearance of the dripper 1, stable production, and consumer usability.

[0036] The anvil 32 is formed with a countersunk 32a so as to correspond to the overlapping portion 20 of the blank plate 3A (as a clearance for one sheet of blank plate 3A). The overlapping portion 20 of the support 3 exists within the sealing range 24 (FIGS. 1 and 4(B)), but even if the support 3 is pressed against the anvil 32 by the ultrasonic horn 31 (FIG. 4(A)), the filter 2 is not strongly pressed by the overlapping portion 20 because the equivalent of one sheet of blank plate 3A enters the countersunk 32a at the overlapping portion 20. This makes it possible to obtain uniformity in the seal strength, and therefore no strong sealed portion that could cause the filter 2 to break when opened is formed at the overlapping portion 20 of the blank plate 3A.

[0037] The same is true for the adhesive area 22. Since the adhesive adhesive area 22 for holding the support 3 in a cylindrical shape is located outside the sealing area 24, the filter 2 is not strongly pressed by the unstable thickness of the adhesive. In other words, in the support 3, as shown in FIG. 1 and FIG. 4(B), the ultrasonic sealing area 24 and the adhesive adhesive area 22 are arranged so as not to overlap, so that the filter 2 is not strongly pressed by the unstable thickness of the adhesive. As a result, the ultrasonic vibration energy does not act strongly on the filter 2 in part, so that uniformity in the seal strength can be obtained, and for example, the filters 2 are not strongly sealed to each other or the outer surface of the filter 2 is not strongly sealed to the inner surface (polyethylene layer P1) of the support 3. Therefore, in the adhesive adhesive area 22, there is no strong sealing part that may cause the filter 2 to break when opened, so even with a small dripper 1, it is possible to prevent the contents 18 from scattering and the filter 2 from breaking when the filter 2 is opened.

[0038] If the seal of filter 2 to support 3 has an appropriate strength, the seal can be used to stabilize filter 2. In other words, ultrasonic sealing can stably hold filter 2 to support 3 before use of dripper 1. For example, filter 2 can be sealed to support 3 with appropriate strength by adjusting the condition of the inner surface of support 3 with a coating, adjusting the ultrasonic sealing processing time, or adjusting the adhesion area.

[0039] When the support 3 shown in FIG. 6(A) is used, since a polyethylene layer P1 is formed on its inner surface, the inner surface of the support 3 and the outer surface of the filter 2 can be peelably bonded in a short time by performing ultrasonic sealing through the support 3 (FIG. 4). That is, by performing ultrasonic sealing from the outer surface of the support 3, the opening 9a of the filter 2 can be peelably closed (filling and sealing process) and the inner surface of the support 3 and the outer surface of the filter 2 can be peelably bonded. Since two bonding operations can be performed simultaneously in one process, high production efficiency can be achieved. Note that when the dripper 1 is used, the support 3 needs to be in a cylindrical open state, so that the filter 2 is peeled off from the support 3. Therefore, the above-mentioned peelable bonding is a temporary bonding to prevent troubles caused by the movement of the filter 2 during transportation, etc., by using the support 3.

[0040] If the ultrasonic sealing process time is long, the adhesive force closing the opening 9a of the filter 2 becomes strong, increasing the possibility that the contents 18 will scatter or the filter 2 will break when the filter is opened. In addition, there is a risk that the front plate 4 of the support 3 will be left with marks such as the countersink 32a of the anvil 32, deteriorating the appearance. If the ultrasonic sealing process time is short, the adhesive force between the inner surface of the support 3 and the outer surface of the filter 2 will be weak, making the filter 2 more likely to move during transportation, etc., increasing the possibility that the filter 2 will come off or break.

[0041] The adhesion between the filter 2 and the polyethylene layer P1 is completed in a shorter time than the adhesion between the filter 2 and the paper layer P0, and with an adhesive force of appropriate strength, so that the adhesive force closing the opening 9a of the filter 2 does not become too strong, and the adhesive force between the inner surface of the support 3 and the outer surface of the filter 2 does not become weak. Therefore, it is possible to prevent the filter 2 from coming off or breaking due to movement, and it is also possible to prevent the contents 18 from scattering when the filter is opened and the filter 2 from breaking. In other words, it is possible to achieve both suitability for transportation and suitability for opening by appropriately balancing the adhesive force when the opening 9a of the filter 2 is peelably closed and the adhesive force when the inner surface of the support 3 and the outer surface of the filter 2 are peelably adhered to each other.

[0042] FIG. 7 shows a schematic diagram of a dripper 1 in which a filter 2 is temporarily attached to one side of a support 3. One inner surface of the support 3 and the outer surface of the filter 2 are temporarily attached, but the other inner surface of the support 3 and the outer surface of the filter 2 are not attached. When ultrasonic sealing is performed from the outer surface of the support 3, peelable adhesion between the inner surface of the support 3 and the outer surface of the filter 2 is likely to occur only on one side of the fold M when the support 3 is in a folded state (the side where ultrasonic vibration energy acts strongly on the support 3 and the filter 2). When ultrasonic sealing is performed as shown in FIG. 4, it is likely to occur only on the side of the back panel 5 and the glue strip 6 (the side of the ultrasonic horn 31 in FIG. 4) as shown in FIG. 7, and is even more likely to occur in the overlapping portion 20 of the blank plate 3A.

[0043] With the filter 2 temporarily attached to one side of the support 3 as described above, in addition to the attachment points of the filter opening 9 to the first opening 7 of the support 3 (two points at the upper end of the support 3), there are additional temporary attachment points between the inner surface of the support 3 and the outer surface of the filter 2, so that the filter 2 is held to the support 3 at three points. This adhesion state allows the support 3 to effectively suppress the movement of the filter 2 during transportation, etc. (improved transportation suitability), and also makes it easier to open the dripper 1 despite significantly improving production efficiency (improved opening suitability).

[0044] When the filter 2 is temporarily attached to one side of the support 3, it is easy to judge whether an excessively biased force is being applied to the sealing area 24 of the filter 2 (i.e., to judge whether the product is good during production). The filter 2 may be partially temporarily attached to the other side of the support 3 (held at four points), but in that case, the adhesive force closing the opening 9a of the filter 2 tends to be too strong. For example, when ultrasonic sealing is performed with excessive bias, a completely non-adhesive state is not achieved, and temporary adhesion occurs especially in the overlapping portion 20, and if the bias becomes even more excessive, temporary adhesion occurs in areas other than the overlapping portion 20 as well. As a result, it becomes difficult to improve the opening suitability of the filter 2.

[0045] When the filter 2 is temporarily attached to one side of the support 3, the load on the closed filter opening 9 is smaller than when the filter 2 is temporarily attached to both sides of the support 3. For example, even if the folded support 3 receives an impact at the position of the fold M (i.e., an impact that presses the left and right folds M in a direction toward each other) during transportation or the like (for example, during the transportation of the product), the impact is absorbed by the gap between the filter 2 and the support 3 in the non-adhered state, since the filter 2 is temporarily attached to one side of the support 3. As a result, the temporary adhesion that closes the opening 9a is less susceptible to influence, and the filter 2 can be prevented from being opened before the dripper 1 is used. In addition, by adjusting the processing time of the ultrasonic seal so that the filter 2 is temporarily attached to only one side of the support 3, it is possible to prevent the front panel 4 of the support 3 from being left with marks such as the countersink 32a of the anvil 32 (scratches caused by the corners of the countersink 32a) and deteriorating the appearance. Therefore, it is preferable that the peelable adhesion between the inner surface of the support 3 and the outer surface of the filter 2 exists only on one side of the fold line M when the support 3 is in the folded state.

[0046] As shown in FIG. 7, the sealing area 24 that peelably closes the opening 9a (FIG. 2) of the filter 2 coincides with the temporary adhesion area 26 that peelably adheres the filter 2 to the support 3. Therefore, the filter 2 and the support 3 are peelably adhered within the sealing area 24 that peelably closes the opening 9a of the filter 2. Since the temporary adhesion area 26 is located away from the contents 18 and there is no need to use an adhesive (such as a hot melt adhesive) for the temporary adhesion, there is no need to worry about hygiene problems, and there is no possibility that the taste or flavor of the coffee will be affected, for example. Another advantage is that the number of steps required for filling the container with coffee is not increased.

[0047] 7, by ultrasonic sealing from the outer surface of the support 3, the inner surfaces of the support 3 are releasably bonded to each other at the fold M when the support 3 is in a folded state (i.e., temporary bonding area 28). Since the support 3 is configured to be slightly smaller than the filter 2, by ultrasonic sealing (sealing area 24) from the outer surface of the support 3, the inner surfaces of the support 3 can be releasably bonded to each other between the positions of the left and right folds M of the support 3 and the filter 2 (temporary bonding area 28).

[0048] When the inner surfaces of the support 3 are temporarily bonded together in the temporary bonding range 28, the load on the opening 9a of the closed filter 2 is smaller than when there is no temporary bonding in the temporary bonding range 28. For example, even if the folded support 3 receives an impact at the position of the fold M during transportation or the like (that is, an impact that presses the left and right folds M in a direction toward each other), the temporary bonding that closes the opening 9a of the filter 2 is less likely to be affected because the inner surfaces of the support 3 are temporarily bonded together in the temporary bonding range 28. This makes it possible to prevent the filter 2 from being opened before the dripper 1 is used.

[0049] If the blank plate 3A (FIG. 3) is coated with polyethylene layers P1, P2 (FIG. 6), it becomes difficult to bend. In order to make the folding easier, it is preferable to configure the folding line L with cut portions C1-C5 and non-cut portions U1-U6 as shown in FIG. 8. By using such folding line L consisting of perforations, the support 3 becomes easier to bend, so that the dripper 1 can be opened easily. Furthermore, since the cut portions C1-C5 and the non-cut portions U1-U6 are formed symmetrically on the top and bottom as a whole, the support 3 becomes even easier to bend. Therefore, the dripper 1 can be opened even more easily.

[0050] Since a crease M is formed at the position of the folding line L, the sealing area 24 (FIG. 1) intersects with the folding line L. If the sealing area 24 intersects with the folding line L at any of the cut portions C1 to C5, the strength of the support 3 is reduced at the cut portions C1 to C5 due to the support 3 being pressed by the ultrasonic horn (seal bar) 31, making it easier to break. To avoid this, as shown in FIG. 8, the sealing area 24 is located within the range of the non-cut portion U1 and is located so as not to overlap with any of the cut portions C1 to C5. The crease M of the support 3 has the role of relaxing the bending stress at the cut portions C1 to C5, so that when using the dripper 1, the support 3 can be flexibly folded at the crease M to a size that fits the cup 17, making it possible to achieve a stable fixed state (FIG. 2).

[0051] The non-cut portion U1, which is located closer to the opening 9a (FIG. 2) of the filter 2 than the cut portions C1 to C5, is formed relatively long with a margin. This effectively prevents the sealing range 24 from going outside the range of the non-cut portion U1. In other words, the uppermost non-cut portion U1 is formed long so that it can accommodate even if the ultrasonic horn 31 is slightly misaligned up or down. This effectively prevents the support 3 from breaking at the folding line L due to a decrease in strength.

[0052] When using the dripper 1, for example, when brewing coffee, the filter 2 is opened, the support 3 is changed from the folded state (FIG. 1) to the cylindrical open state (FIG. 2) to open the filter 2, and then the dripper 1 is placed on the cup 17. When hot water is poured into the filter 2 from the opening 9a, the extracted coffee passes through the filter 2 and accumulates in the cup 17. Since the state inside the cup 17 can be seen from the hole 16, the amount of coffee in the cup 17 can be easily confirmed while pouring the hot water. In this way, by pouring a predetermined amount of hot water into the filter 2 from the opening 9a, a beverage (coffee, black tea, green tea, etc.) in which desired ingredients have been extracted from the contents 18 in the filter 2 can be obtained in the cup 17.

[0053] When dripper 1 with support 3 in the cylindrical open state as described above is placed on cup 17, as shown in Figure 2, protrusion 11 will be located inside the edge of cup 17, legs 13 will be located outside second opening 8, and the tips of legs 13 will be located outside the edge of cup 17. The restoring force of support 3 attempting to return to the folded state (Figure 1) strongly presses the edge of cup 17 from inside and outside by protrusion 11 located inside cup 17 and legs 13 located outside cup 17, so even a large-capacity dripper 1 is held in a stable state.

[0054] The movement of the support 3 is restricted by the edge of the cup 17 due to the bent shape of the legs 13 (e.g., engagement at the bent position), so the position of the dripper 1 is not fixed without the presence of the cup 17. In other words, as long as the edge of the cup 17 is within the range from the second opening 8 to the bent position of the legs 13, the dripper 1 can be set on the cup 17 while keeping the shape of the dripper 1 in an open state. This makes it possible to accommodate a wide variety of cups 17 (various cup sizes, cup shapes, etc.). Depending on the cup size and cup shape, the dripper 1 may be set on the cup 17 so that the protruding portion 11 is located outside the edge of the cup 17, or the dripper 1 may be set on the cup 17 using only the legs 13, omitting the protruding portion 11.

[0055] As described above, according to this embodiment, the ultrasonically sealed area 24 and the adhesively bonded area 22 are arranged so as not to overlap, so that the filter 2 is not strongly pressed by the unstable thickness of the adhesive. As a result, the ultrasonic vibration energy is not strongly applied to the filter 2 in some parts, so that the filters 2 are not strongly sealed to each other or the outer surface of the filter 2 is not strongly sealed to the inner surface of the support 3. Therefore, even with a small dripper 1, scattering of the contents 18 and tearing of the filter 2 when the filter 2 is opened can be prevented.

[0056] The front view of Fig. 5 shows a specific example of the positional relationship between the sealing area 24 and the adhesive area 22. Fig. 5(A) shows the specific example (Fig. 1) described above. That is, it is a specific example (three-point hot melt type) in which three adhesive areas 22 provided in the overlapping portion 20 of the back panel 5 are all positioned outside the sealing area 24. Figs. 5(B) to 5(D) show specific examples (two-point hot melt type) in which two adhesive areas 22 provided in the overlapping portion 20 of the back panel 5 are all positioned outside the sealing area 24. In all of the specific examples, the sealing area 24 by ultrasonic sealing and the adhesive adhesive area 22 are positioned so as not to overlap, so that the thickness of the adhesive does not affect the ultrasonic sealing.

[0057] As described above, according to this embodiment, since the support 3 has the polyethylene layer P1 on its inner surface, the inner surface of the support 3 and the outer surface of the filter 2 can be stably bonded in a short time by ultrasonic sealing from the outer surface of the support 3. This bonding state prevents the movement of the filter 2 during transportation, etc., by the support 3, so that it is possible to prevent the filter 2 from coming off or breaking due to the movement of the filter 2. In addition, since the opening 9a of the filter 2 is closed in a peelable manner by ultrasonic sealing from the outer surface of the support 3, the seal strength is stabilized, so that it is possible to prevent the contents 18 from scattering when the filter is opened and the filter 2 from breaking. Therefore, it is possible to realize a dripper 1 that has good transport suitability with respect to the attachment state of the filter 2 to the support 3, and has good opening suitability with respect to the seal strength of the filter opening 9a.

[0058] In addition, the peelable adhesion state between the inner surface of the support 3 and the outer surface of the filter 2 exists only on one side of the fold M when the support 3 is in the folded state, so the load on the closed filter opening 9 is small. Due to this stable adhesion state, the movement of the filter 2 during transportation, etc. is suppressed by the support 3, so that it is possible to prevent the filter 2 from coming off or breaking due to the movement of the filter 2. In addition, the opening 9a of the filter 2 is peelably closed by ultrasonic sealing from the outer surface of the support 3, so that the seal strength is stabilized to prevent the contents 18 from scattering and the filter 2 from breaking when the filter is opened. Therefore, it is possible to realize a dripper 1 that has good transport suitability with respect to the attachment state of the filter 2 to the support 3 and good opening suitability with respect to the seal strength of the filter opening 9a.

[0059] In this embodiment, the folding line L that forms the crease M when the support 3 is in a folded state is composed of the cut portions C1 to C5 and the non-cut portions U1 to U6, so that folding for opening and folding can be easily performed. Since folding when opening the filter is easy, it is possible to prevent the contents 18 from scattering. In addition, since folding in the filling and sealing process is easy, it is possible to improve production efficiency, and it is also possible to obtain stable seal strength at the filter opening due to sufficient adhesion between the support 3 and the filter 2. Therefore, it is possible to realize a dripper 1 that maintains a stable shape and filter state and is easy to open and fold. [Explanation of symbols]

[0060] 1 Dripper 2. Filters 3 Support 3A Blank Board 4 Front plate 5 Back plate 6 Glue allowance piece 7 First opening 8 Second opening 9 Filter opening 7a,8a,9a opening 11 Protrusion 13 Legs 14 Cutting 15 Notch 15a Contour 16 holes 16a Contour part 17 cups 18 Contents 19 Creases 20 Overlap 22 Adhesive range 24 Sealing range 26,28 Temporary adhesion range 31 Ultrasonic horn (seal bar, ultrasonic sealing device) 32 Anvil (receiving jig, ultrasonic sealing device) 32a Countersink G Outer hull L Folding line M Fold N recess P0 paper layer P1, P2 polyethylene layer

Claims

1. A dripper having a bag-shaped filter in which a content having a component to be extracted is enclosed, and a cylindrical support formed so as to be foldable with the filter located inside, A folding line that forms a crease when the support is in a folded state is composed of a cut portion and a non-cut portion, an opening of the filter is peelably closed by an ultrasonic seal from an outer surface of the support; a sealing area for peelably closing the opening of the filter is located within the non-cut portion and does not overlap with the cut portion.

2. A dripper having a bag-shaped filter in which a content having a component to be extracted is enclosed, and a cylindrical support formed so as to be foldable with the filter located inside, A folding line that forms a crease when the support is in a folded state is composed of a cut portion and a non-cut portion, an opening of the filter is peelably closed by an ultrasonic seal from an outer surface of the support; The dripper is characterized in that a plurality of the non-cut portions are formed, and among the plurality of non-cut portions, a relatively long non-cut portion is located closer to the opening of the filter than the cut portion.

3. 3. The dripper according to claim 1, wherein the support has a polyethylene layer on an inner surface thereof.

4. 4. The dripper according to claim 1, wherein the support has a V-shaped notch and a sector-shaped hole, and when the left and right folds of the support in a folded state are pressed in a direction toward each other, a substantially S-shaped contour is generated along the notch and the hole, and the opening of the cylindrical support is formed into a substantially hexagonal shape.

5. A method for manufacturing the dripper according to any one of claims 1 to 4, comprising the steps of: The support is made of a folded blank plate, Applying an adhesive to the overlapping portion formed by overlapping both ends of the blank plate, and forming a cylindrical support by the adhesion; The filter is provided within the support; Place the contents in the filter; The method of manufacturing the filter includes: performing ultrasonic sealing from an outer surface of the support to peelably close the opening of the filter.

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