Extraction bags

Abstract

In extraction bags of the tea bag type in which the free end of the holding portion is folded in half during extraction, the folded state of the free end of the holding portion can be maintained by a simple operation. The extraction bag 1A has a bag body 11 formed from a water-permeable filterable sheet, a thin plate-like member 20 disposed on the outer surface of the bag body, and an extraction material A filled within the bag body. The bag body 11 has 2 opposing faces, the thin plate-like member 20 has a retaining portion 30 disposed on one of the 2 faces of the foregoing, and a fixing portion 21 adjacent to the upper edge of the bag body of the retaining portion 30 and fixed to the bag body. The retaining portion 30 has a double fold line L 1 , the upper end of the folding fold line L 1 being fixed to the bag body 11 , the lower portion may be pulled up from the bag body 11 , and at least the width of the retaining portion 30 is equally divided at the lower part of the retaining portion 30 . At the side edges of the holding portion 30 , a pair of notches 40A, 40B are formed by folding the width of the holding portion 30 in half and cramming.

Description

Technical Field

[0001] This invention relates to an extraction bag in which an extraction material filled in a bag body made of a water-permeable filter sheet is immersed in hot water to obtain an extract. Prior Technology

[0002] Previously, tea bags, which consisted of a permeable bag with a hanging rope and filled with tea leaves, were widely used to easily brew beverages such as green tea, black tea, and oolong tea. The same applies to coffee; in addition to drip extraction bags that pour hot water into coffee grounds, tea bag-style coffee extraction bags were also used, in which the bag filled with coffee grounds was immersed in hot water.

[0003] In tea bag-type coffee extraction bags, even when the bag is immersed in hot water, the bag containing coffee powder tends to float because of the carbon dioxide in the coffee powder, making it difficult to fully extract the coffee. Therefore, a method is proposed in which a hanging tab formed of a thin plate is pre-attached to one side of the bag containing coffee powder, so that the bag containing coffee powder will not float in hot water, thus suspending and fixing the hanging tab to the rim of the cup (Patent Document 1).

[0004] However, as described in Patent Document 1, even when the hook, made of a thin sheet such as kraft paper, is used to forcibly submerge the bag body in hot water, it is difficult to submerge the bag body due to the bending or flexing of the thin sheet. To promote coffee extraction, even when the hook protruding from the cup moves up and down, the bag body in the hot water does not move up and down in the same direction as the hook. Furthermore, even if the bag body is temporarily submerged in hot water, only the surface layer of the coffee powder filling the bag body swells in the hot water; the hot water does not easily penetrate the interior of the coffee powder. Therefore, in tea bag-type extraction bags where the bag body is immersed in hot water, it is difficult to obtain the same concentration of coffee liquid as a drip brewing method in a time less than that of a drip brewing method.

[0005] Relative to this, a teabag type of extraction bag is proposed, in which a holding portion formed of a thin plate-like material is disposed on one face of the bag body, capable of fixing the upper part of the retaining portion to the bag body, pulling up the lower self-bag body, setting up a specific polyline at the part that becomes capable of pulling up (Patent literature 2, 3). According to such extraction bags, it is easy to hold the retaining portion, sinking the bag body in, or up and down in hot water, because the holding portion of the holding portion pulled up from the bag body is partially folded in half against the free end portion. Furthermore, in the state of pulling up the holding part self-bag body, the upper edge of the bag body is bent, the surfaces of the surface back of the bag body are far away from each other and form a top space in the bag body, so hot water easily enters the inside of the bag body, not only the surface of the extraction material in the bag body but also the inside is soaked with hot water to promote extraction.

[0006] [Previous technical literature] [Patent Literature] Patent Literature 1: Utility New Case Registration No. 3140084 Patent Literature 2: Patent Bulletin No. 7271038 Patent Literature 3: Patent Bulletin No. 7224609 Invention content

[0007] [Problem to be solved by the invention] However, in the extraction bag of patent literature 2 and 3, if the hand is removed from the holding part during extraction, the angle of the opposite plane of the holding part of the folded part expands. Also, the volume of the bag body is reduced and the permeability of the extracted material from the hot water to the bag body is reduced due to the expansion of the angle of the opposite plane of the holding part of the double fold and the weakening of the buckling of the upper edge of the bag body.

[0008] Relative to this, the subject matter of the present invention lies in: In teabag-type extraction bags in which the free end of the holding part capable of being pulled up from the bag body is folded in half during extraction, the folded state of the free end of the holding part can be maintained even if the hand is removed from the holding part during extraction by simple operation.

[0009] [Technical means of solving the problem] The invention contemplates that the invention can be easily maintained by a series of operations following the operation of the hand that folds the holding part in half, turning the holding part gently, etc., if the free end of the holding part is disposed in a state of folding the free end of the holding part in a state of folding the free end of the holding part by turning the holding part gently into each other.

[0010] Also, the invention provides an extraction bag having a bag body formed from a water-permeable filterable sheet, a thin plate-like member disposed on an outer surface of the bag body, and an extraction material filled within the bag body, and The bag body has 2 opposite sides. The thin plate-like member has a retaining portion disposed on one of the 2 faces of the foregoing, and a fixing portion adjacent to the upper edge of the bag body of the retaining portion and fixed to the bag body, With respect to the holding part, the upper end of the holding part is fixed to the bag body, the lower part of the holding part is capable of being pulled up from the bag body, At least at the lower part of the holding portion form a double fold line dividing the width of the holding portion equally, At the two sides of the holding portion, a pair of notches is formed by folding the width of the holding portion in half and turning and snapping.

[0011] [Effect of the invention] According to the extraction bag of the present invention, in the use of the extraction bag, the notches on both sides of the edge of the retaining part are snapped by following a series of simple operations such as folding the width of the holding part in half at the fold line, turning the holding part.

[0012] In particular, in the manner in which the notch is set to a specific shape, the notch snapping becomes extremely easy regardless of whether the notch is snapped regardless of whether the holding part of the double fold is turned in either direction to the left or right.

[0013] The permeability of the extraction material within the bag body by hot water is improved by pre-pulling the holding part self-bag body up and the bag body bending and increasing the volume. Therefore, resorting to pre-pulling the holding part self-bag body up and causing the notch to snap during extraction of the extraction bag, maintaining the folded state of the holding part even if the hand is removed from the holding part, is able to maintain the bag body in a suitable shape for extraction.

[0014] In particular, the upper edge of the central portion of the width of the retaining portion (the upper edge of the central portion of the holding portion biased against the upper edge of the bag body) is separated from the fixing portion, which is capable of causing the central protrusion to be suspended and fixed to the cup when the holding portion is pulled up in such a way that the length of the retaining portion becomes the superior and inferior direction of the bag body. Here, if a pair of longitudinal fold lines is formed in the fixed part of the thin plate-like member, the fixed part of the thin plate-like member is buckled by the longitudinal fold line in the state of folding the holding part in half, and the fixed part becomes the shape along the inner wall of the cup. Therefore, the suspended fixed state of the extraction bag was stable.

[0015] Furthermore, in designs where the fixing and holding parts are shaped in a specific way, when the holding part is pulled up from the bag body, the angle between the length direction of the holding part and the vertical direction of the bag body becomes approximately perpendicular. The upper end of the bag body is pressed down by the fixing part, causing the top space to expand and the volume of the bag body to increase. Therefore, a sufficient amount of hot water can pass through the bag body, allowing the desired concentration of extract to be obtained in a short time.

[0016] After temporarily removing your hand from the holding part, when you need to hold the holding part again to move the bag body immersed in hot water or to lift the extraction bag from the extraction liquid, you can simply hold the holding part that is already folded in half; there is no need to fold the holding part in half again. Simple Explanation of the Diagram

[0017] Figure 1 is an unfolded view of the extraction bag 1A of the embodiment. Figure 2A is a front view of the extraction bag 1A of the embodiment and an enlarged view of its notch. Figure 2B is a rear view of the extraction bag 1A in the embodiment. Figure 3 is an illustrative diagram illustrating the operation of engaging the notch in the extraction bag 1A of the embodiment. Figure 4 is an enlarged view of the notch of the locking mechanism. Figure 5A is a perspective view of an extraction bag 1A in which the retaining part is pulled up from the bag body and placed into the cup in an embodiment in which the length direction of the retaining part is approximately perpendicular to the vertical direction of the bag body. Figure 5B is a side view of an extraction bag 1A in an embodiment where the holding part is pulled up from the bag body and placed into the cup in a manner in which the length direction of the holding part is approximately perpendicular to the vertical direction of the bag body. Figure 5C is a side view of an extraction bag 1A in an embodiment where the holding part is pulled up so that its length direction is aligned with the vertical direction of the bag body. Figure 5D is a perspective view of an extraction bag 1A in an embodiment where the central protrusion of the retaining part is suspended and fixed to the opening edge of the cup. Figure 5E is a top view of an example of an extraction bag 1A in which the central protrusion of the retaining part is suspended and fixed to the opening edge of the cup. Figure 6 is an unfolded view of the extraction bag 1B of the embodiment. Figure 7 is a side view of the extraction bag 1B of the embodiment with the free end of the holding part pulled up. Figure 8 is a plan view of the sheet material used to manufacture the extraction bag 1A according to the embodiment. Figure 9 is an explanatory diagram of the manufacturing method of the extraction bag 1A in the embodiment. Figure 10 is an explanatory diagram of the manufacturing method of the extraction bag 1A of the embodiment. Figure 11 is a front view of the extraction bag 1C of the embodiment and an enlarged view of its notch. Figure 12 is a front view of the extraction bag 1D of the embodiment and an enlarged view of its notch. Figure 13 is a front view of the extraction bag 1E of the embodiment. Figure 14 is a front view of the extraction bag 1F of the embodiment. Figure 15 is a front view of the extraction bag 1G in the embodiment. Figure 16 is a development diagram of the extraction bag 1H of the embodiment. Figure 17A is a perspective view of the extraction bag 1H in an embodiment where the retaining part is pulled up from the bag body and placed into the cup. Figure 17B is a side view of an extraction bag 1H in an embodiment where the holding part is pulled up so that its length direction is aligned with the vertical direction of the bag body. Figure 17C is a top view of an extraction bag 1H in an embodiment where the holding part is pulled up so that its length direction is aligned with the vertical direction of the bag body. Figure 18 is an unfolded view of the extraction bag 1I of the embodiment. Figure 19 is a perspective view of an extraction bag 1I in an embodiment where the retaining part is pulled up from the bag body and placed into the cup. Figure 20 is an unfolded view of the extraction bag 1J of the embodiment. Figure 21A is a perspective view of an extraction bag 1J in an embodiment where the retaining part is pulled up from the bag body and placed into the cup. Figure 21B is a side view of an extraction bag 1J in an embodiment where the retaining part is locked at the opening edge of the cup. Figure 21C is a side view of an extraction bag 1J in an embodiment where the retaining part is locked at the opening edge of the cup. Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. Furthermore, in each drawing, the same symbol represents the same or equivalent constituent element.

[0019] (Overall Composition) Figure 1 is an unfolded view of the extraction bag 1A according to one embodiment of the present invention, showing the upper edges of the two opposing sides of the bag body 11 as continuous. Figure 2A is a plan view of the extraction bag 1A in the unpulled holding portion 30 state, and Figure 2B is its rear view. An enlarged view of a pair of notches 40A and 40B is also included in Figure 2A. In Figures 1 and 2A, the areas painted with fine diagonal lines represent the contact areas between the bag body 11 and the thin plate-like member 20. In Figures 2A and 2B, the areas painted with thick diagonal lines represent the sealing areas between the water-permeable filter sheets 10 forming the front and back of the bag body 11, and the areas painted with dots represent the surfaces of the water-permeable filter sheets 10 forming the bag body 11. Furthermore, in the present invention, the contact areas are not limited to the forms shown in the figures. Furthermore, the portion where the permeable filter sheet 10 adheres to the thin plate member 20 is usually not visible from the side of the thin plate member 20 due to the non-transparent nature of the thin plate member 20.

[0020] The extraction bag 1A of this embodiment has a bag body 11 formed of a water-permeable filter sheet 10, a thin plate-like member 20 disposed on the outer surface of the bag body 11, and an extraction material filled inside the bag body 11. The bag body 11 has two opposing sides. The thin plate-like member 20 has a holding portion 30 disposed on one of the aforementioned two sides of the bag body, and a fixing portion 21 adjacent to the upper edge 11a side of the bag body of the holding portion 30. The fixing portion 21 is fixed to the bag body 11 by adhering to it. Reinforcing portions 25 extend from the left and right sides of the fixing portion 21 toward the bottom edge 11b side of the bag body via a horizontal fold line L4. Preferably, the lower end of the reinforcing portion 25 is positioned at the lower end of the bag body in the vertical direction below the holding portion 30 or near it. In the extraction bag 1A of this embodiment, the lower end of the holding portion 30 becomes the edge of the thin plate-shaped member 20 near the bottom edge 11b of the bag body. A reinforcing portion 25 is located near the upper edge 11a of the bag body, but the lower end of the reinforcing portion 25 can be positioned near the bottom edge 11b of the bag body, and the lower part of the reinforcing portion 25 can surround the lower part of the holding portion 30. As the bag body 11 is positioned vertically, the reinforcing portion 25 extends from the fixing portion 21 to the lower end of the holding portion 30 or its vicinity, thus suppressing the floating of the bag body during extraction.

[0021] Furthermore, by having a horizontal fold line L4 between the reinforcing part 25 and the fixing part 21, when the holding part 30 is pulled up as shown in Figures 5A and 5B, the upper end 11u of the bag body 11 is pressed by the fixing part 21, and the top space expands, thus increasing the volume of the bag body 11. Therefore, a sufficient amount of hot water can pass through the bag body 11.

[0022] The holding portion 30 is fixed to the bag body 11 by means of the upper end of the holding portion 30 being continuous in the fixing portion 21 , and the lower portion of the holding portion 30 becomes a free end capable of being pulled up from the pocket body 11 .

[0023] The retaining portion 30 has a double fold line L1 on the center line L0 of the width of the retaining portion 30 that equalizes the width of the lower portion of the holding portion 30 . At the side edges of the holding portion 30 , a pair of notches 40A, 40B are formed by folding and turning the width of the holding portion 30 in half.

[0024] In the present invention fold lines may be formed by perforated lines, half-cut processing, crimping, and the like.

[0025] The fixing portion 21 , the reinforcing portion 25 and the retaining portion 30 may be formed by cutting a thin plate-like material. As thin plate-like materials, cardboard, plastic sheets, etc. can be cited. The thin plate-like material was based on the point of disposability after the use of the extraction bag 1A, preferably using biodegradable materials such as polylactic acid, polybutylene Succinate (PBS), and polyethylene Succinate (PES).

[0026] On the other hand, the bag body 11 is a rectangular flat bag in a top view, and the upper edge 11a is formed by the folded convex edges of the water-permeable and filterable sheet 10 . Furthermore, in the present invention the bag body 11 is not limited to a flat bag, nor is it limited to a rectangle when viewed from above. For example, may have a crotch piece at the bottom.

[0027] As a permeable and filterable sheet, for example, various filling specified amounts of extraction material can be used, leaching of the extraction material can be achieved when hot water is injected. Generally, as sheet materials for leaching, such as known synthetic fibers such as polyester, nylon, polyethylene, polypropylene, vinyl, semi-synthetic fibers such as vinyl, cypress fibers, woven or non-woven fabrics formed from single or composite fibers of natural fibers such as trichium fibers, Papers such as manila hemp, wood pulp paper, mixed copy paper formed from polypropylene fibers, etc., tea bag raw paper, etc., may be used in the present invention, but based on the point of disposability after the use of the extraction bag, it is preferable to make the water-permeable filterable sheet material contain biodegradable fibers. As biodegradable fibers, polylactic acid, polybutylene serine, and polyethylene serine can be cited.

[0028] As extract materials filled in the body of the bag 11 , coffee powder, tea leaves, or Chinese herbal medicines may be cited.

[0029] (Details of the fixed part) The fixing part 21 has an inverted trapezoidal cutout 22 at its upper center, and the upper edges 21a of both sides of the fixing part 21 protrude from the upper edge 11a of the bag body. Due to the protrusion of the upper edge 21a, as explained in the method of using the extraction bag 1A described later, when the holding part 30 is folded at the fold line L1 and its free end is pulled up from the bag body 11, as shown in Figures 5A and 5B, when the length direction of the holding part 30 is approximately perpendicular to the vertical direction of the bag body 11, the upper end of the bag body 11 overlaps with the upper end of the fixing part 21, and the top space of the bag body 11 increases.

[0030] On the other hand, the lower bottom 22a of the inverted trapezoidal cut 22 is located closer to the bottom edge 11b of the bag body than the upper edge 11a of the bag body 11. The fixing part 21 has a pair of longitudinal fold lines L3 extending from both ends of the lower bottom 22a toward the bottom edge 11b of the bag body. The holding part 30 is folded at the fold line L1, and its free end is pulled up significantly from the bag body 11. In a state where the length direction of the holding part 30 is roughly the vertical direction of the bag body 11 as shown in FIG. 5C, the trapezoidal bending of the fixing part 21 of the extraction bag 1A is achieved by the longitudinal fold line L3. The trapezoidal bending shape of the fixing part 21 is locked by the engagement of the notches 40A and 40B, and the overall shape of the thin plate member 20 is also stabilized. Then, in this state, the lower part of the main body of the bag body 11 expands. Therefore, during extraction, the holding part 30 is moved up and down in this state, and the extraction is promoted by moving the bag body 11 up and down in the hot water of the cup 100.

[0031] Furthermore, when the holding part 30 is pulled up so that its length direction is roughly vertically aligned with the bag body 11, as shown in FIG. 5C, the central protrusion 31, described later, separates from the surface of the bag body 11 and becomes a downward protrusion. Therefore, as shown in FIG. 5D, the front ends 32a and 32b of the central protrusion 31 can be suspended and fixed to the opening wall of the cup 100. Because the fixing part 21 is bent as described above in this suspended and fixed state, as shown in FIG. 5E, the fixing part 21 can be aligned with the opening shape of the cup 100. Therefore, the stability of the suspended and fixed state is improved.

[0032] The fixing part 21 has a forked protrusion 23 at the center of its width, which forks and protrudes toward the bottom edge 11b of the bag body. The bent edge 23a of the forked protrusion 23 on the bottom edge 11b of the bag body becomes the cutting line C1 that separates the fixing part 21 from the holding part 30 (Fig. 2A).

[0033] (Details of the holding section) The sessile portion 30 has a central protrusion 31 that protrudes opposite to the width of the concave portion of the central portion of the bifurcation protrusion 23 of the fixation portion 21 ( Fig. 2A ). In other words, the upper edge of the central portion of the width of the holding portion 30 is located to the side of the bottom edge of the bag body more than the fixing portion 21 , where the central portion of the upper edge of the central portion of the width of the holding portion 30 has a central protrusion 31 projecting toward the upper edge of the bag body 11a , the sides of which become a concave portion 33 with an incisal line C1 between the central protrusion 31 and the concave portion 33 and the fixation portion 21 .

[0034] Also, at the holding portion 30 , the fold line L1 on the center line L0 of its width extends upward from the lower end of the holding portion 30 to the central portion of the holding portion 30 , branching at the central portion of the folded fold line L1 into a V-shaped fold line L2 . An incisal line C2 is formed between the upper ends of the V-shaped polyline L2 each other in such a manner as to link those upper ends to each other. By means of a V-shaped polyline L2, the stability when suspending the extraction bag 1A with the recessed portion 33 of the retaining portion 30 from the opening edge of the cup 100 can generally be increased as shown in Figure 5D .

[0035] Width of the bifurcation protrusion 23 of the fixation portion The concavity portion of the central portion of the bifurcation, 24, is opposite to the central protrusion 31 of the retaining portion 30. At the central protrusion 31, an aliquot of the incisal line C3 of the width of that central protrusion 31 is extended downward from the upper end of the central protrusion 31 to reach the aforementioned incisal line C2 ( Fig. 2A ). The incisal line C3 forms on the center line L0 of the width of the fixation portion 30 . The anterior end portions 32a, 32b of the central protrusion 31 are separated when the holding portion 30 self-pocket body is pulled up by cutting lines C2, C3 as shown in Figure 5A. When the holding portion 30 is further pulled up and the extraction bag 1A is suspended and fixed to the cup 100 as shown in Figure 5D , the extraction bag 1A is suspended and fixed in a state separated by the anterior end portions 32a , 32b of the central protrusion 31 , thereby also improving the stability of the suspension-fixed state.

[0036] (notch) A pair of notches 40A , 40B is formed at the lateral margins of the holding portion 30 ( Fig. 2A ). The notches 40A , 40B are formed as shown in Figure 3 , by pulling up the free end of the holding part 30 from the bag body 11 , bending the holding part 30 at the double fold line L1 , or turning the holding part 30 in the direction of the arrow A or B (with the double fold line L1 as the axis counterclockwise or clockwise), and the holding part 30 is easily snapped. In other words, no matter whether the retaining part 30 is turned in either direction to the left or right, the notches 40A, 40B are stuck. Therefore, notches 40A, 40B are asymmetric with respect to the bifurcation line L1. The notches 40A and 40B are stuck regardless of whether the holding part 30 is turned in either direction or not, because the notches 40A and 40B are stuck regardless of the personality, habits or mood of the user who has a tendency to turn left and right.

[0037] More specifically, as shown in Figure 2A , the two notches 40A, 40B are formed by straight portions 41A, 41B and circular arc-shaped curved portions 42A and 42B, respectively. The better position of the formation of notches 40A and 40B is the distance D2 between the lower end of the V-shaped polyline L2 and the length direction of the holding part 30 of the notch 40A and 40B relative to the distance D1 of the lower end of the V-shaped polyline L2 (the flexed end of the V) and the front end of the holding part 30 is 20%~80%. Also, the angle α made by the straight portions 41A and 41B of the notches 40A and 40B and the centerline L0 of the width of the holding portion 30 is preferably 40ﾟ~140ﾟ.

[0038] The extensions of the straight portions 41A, 41B of the two notches 40A, 40B are symmetrical with respect to the fold line L1. Further, in this embodiment, based on points on the design, extensions formed as straight portions 41A , 41B pass through the center P of a circular arc forming the lower edge of the holding portion 30 .

[0039] Among the two notches, the straight portion 41A of one notch 40A is formed near the lateral edge portion of the arc-shaped bending portion 42A self-holding portion 30 leaning against the fold line L1.

[0040] Accordingly, if the retaining portion 30 bent at the fold line is nudged toward A of FIG. Because the notches 40A , 40B are formed near the end of the free end side of the folding hold 30 , i.e. slightly more deviated from the securing portion 21 than the position where the end is picked up with the fingers, the notches 40A and 40B are easily snapped by folding the hold 30 in half at the double fold line L1 and picking it up with the fingers.

[0041] (How to use) As the packaging, flow-through form of the extraction bag 1A , as shown in Figure 2A , it is preferable to be packed in a state where the thin plate-like member 20 is flattened on the bag body 11 .

[0042] As a method of setting the flattened extraction bag 1A to the starting state and the self-extraction bag 1A to perform the extraction of the extraction material, first, as shown in Fig. 3 , the free end of the holding part 30 is picked up. Only with the dick in turn notches 40A, 40B easily snap. For example, the notches 40A, 40B snap together as shown in FIG.

[0043] In making the notches 40A, 40B snap, the length direction of the retaining portion 30 (i.e., the direction of the bifold line L1) becomes roughly vertical with respect to the up-and-down direction (the direction of the center of gravity line) Lz of the bag body 11 . In that state, the central protrusion 31 of the retaining portion 30 shown in FIG. 2A is separated into 2 by incisive line C3 as shown in FIG. 5A , with the front end portions 32a , 32b lining against the bag body 11 , the bag body 11 not easily swinging with respect to the retaining portion 30 . Thus, in plucking the free end of the retaining portion 30 in such a way that the length direction of the retaining portion 30 becomes a level, the upper and lower direction of the bag body 11 is at rest along the lead straight direction. Thereby, the bag body 11 can be placed within the cup 100 smoothly. Also, in that state, the upper end portion 11 u of the bag body 11 is pressed by the fixing portion 21 , the head space of the bag body 11 is expanded, and the volume of the bag body 11 is also expanded. Therefore, the extraction of the extraction material is carried out when the extraction bag 1A is placed in the cup 100 as shown in Figure 5B , hot water is injected into the cup 100 and the bag body 11 is impregnated in hot water B . Extraction may also be further facilitated by making the holding portion 30 up and down as needed.

[0044] Extraction of the material can also be carried out in the following ways: as shown in Figure 5C, the holding part 30 is pulled up from the bag body 11 in such a way that the length direction of the holding part 30 is roughly parallel to the vertical direction of the bag body 11, so that the bag body 11 is immersed in the hot water B in the cup 100, or the bag body 11 is placed vertically relative to the hot water B, or as shown in Figure 5D, the extraction bag 1A is suspended and fixed in the cup 100 by placing the concave part 33 of the holding part 30 on the opening edge of the cup 100, and the hand is removed from the holding part 30 and left to stand. In the extraction bag 1A of this embodiment, since the central protrusion 31 is divided into two by the cutting line C3, and thus also has a cutting line C2, when the holding part 30 is set to the pulled-up state and the extraction bag 1A is suspended and fixed to the cup 100, the state of suspending and fixing the extraction bag 1A to the cup 100 is stable because there is an appropriate gap between the pair of recesses 33 adjacent to the front ends 32a and 32b of the central protrusion. Furthermore, in this state, the fixing part 21 is bent by the longitudinal fold line L3, forming a shape along the inner surface of the opening edge of the cup 100 (Fig. 5E), and the suspension and fixing state of the extraction bag 1A is also stable by the shape of the fixing part 21.

[0045] Furthermore, in this invention, the central protrusion 31 and recess 33 of the retaining portion 30 can also be omitted.

[0046] The extraction bag 1B shown in Figure 6 is the same as the extraction bag 1A shown in Figure 1 in terms of its unfolded diagram. The central protrusion 31 and recess 33 of the holding portion 30 are omitted, and the cutting line C1 is set to be approximately flat. The other components are the same as those of the extraction bag 1A in Figure 1. Therefore, a pair of recesses 40A and 40B are formed in the holding portion 30.

[0047] In the extraction bag 1B, when the holding part 30 is folded at the fold line L1 and the free end of the holding part 30 is pulled up from the bag body 11, since the holding part 30 does not abut against the protrusion of the bag body 11, from the beginning of pulling up until as shown in Figure 7, the length direction of the holding part 30 becomes approximately parallel to the vertical direction Lz of the bag body 11, and it can be pulled up smoothly.

[0048] (Manufacturing method) In order to manufacture the extraction bag 1A of this embodiment using a bag making and filling packaging machine, for example, it is preferable to prepare a roller of the extraction bag manufacturing sheet 50 as shown in FIG8.

[0049] The sheet 50 for manufacturing the extraction bag is a thin plate-like member 20 of the extraction bag, which is continuously arranged at predetermined intervals on the water-permeable filter sheet 10 that forms the bag body. In the figure, the area demarcated by the chain line at two points is the area of ​​one portion of the extraction bag 1A.

[0050] The extraction bag manufacturing tablet 50 is installed in the bag making filling and packaging machine, the two sides of the extraction bag manufacturing tablet 50 are sealed together by conventional method (longitudinal sealing) and the extraction bag manufacturing tablet 50 is made cylindrical as shown in Figure 10.

[0051] (The changing form of the notch) The extraction bags of the present invention may adopt various variations.

[0052] For example, with respect to a pair of notches provided in the holding portion, not limited to those formed by straight portions 41A, 41B and circular arc-shaped curved portions 42A, 42B as shown in FIG. 2A , the extraction bag 1C as shown in FIG. The configuration of the extraction bag 1C is identical with respect to the extraction bag 1A shown in Figure 2A except for the notch.

[0053] In the extraction bag 1C shown in FIG. The same is also true for the other notch 40B. The arrangement order of the peaks and grains observed at the edges of the self-holding portion 30, the S-shaped bending portions 43A, 43B of both become opposite. The straight portions 41A, 41B of notches 40A, 40B of both are formed symmetrically with respect to the bisected polyline L1.

[0054] In folding the hold 30 in half at the fold line L1, the peak of the S-shaped bend 43A of one overlaps with the grain of the S-shaped bend 43B of the other, and the grain of the S-shaped bend 43A of the other overlaps with the peak of the S-shaped bend 43B of the other. Therefore, a pair of notches 40A, 40B can be snapped regardless of which direction the holding part set to be folded is turned left and right with respect to the double fold line L1 (i.e., whether it is turned clockwise or counterclockwise with respect to the length direction of the holding part 30).

[0055] The S-shaped bends 43A, 43B shown in FIG.

[0056] As in the extraction bag 1D shown in FIG. 12 , one of a pair of notches 40A , 40B can also be formed by a rectangular wave-type bending portion 44A and a straight-line portion 41A , the other being provided only as a straight-line portion 41B . The straight portions 41A , 41B form each other at such a position where they overlap when folding the retaining portion 30 in half at the double fold line L1 .

[0057] As in the extraction bag 1E shown in Fig. 13 , the straight portions 41A , 41B of the notch may also be disposed vertically with respect to the bifold polyline L1 of the holding portion 30 . Based on the point that ensures the length of the mutually overlapping portions of the opposing pair of notches, it is preferable to make the straight portions 41A , 41B of the notches inclined with respect to the bisected polyline L1 of the holding portion 30 .

[0058] As in the extraction bag 1F shown in Figure 14 , a pair of notches 40A, 40B can also be set as ハ shape, respectively.

[0059] In the extraction bag described above, the folded holding portion 30 is snapped by turning the notch in either direction counterclockwise or clockwise, but the holding portion will be turned in order to make a pair of notches 40A, 40B snap In the case where the direction is set to either counterclockwise or clockwise, a pair of notches 40A, 40B may be set as I notches inclined with respect to the double fold line L1, respectively, as in the extraction bag 1G shown in Fig. 15 .

[0060] (Variable form of the fixed part) Various correspondences may also be adopted for the holding portion of the extraction bag of the present invention.

[0061] For example, the extraction bag 1H shown in FIG. 16 is relative to the extraction bag 1A shown in FIG.

[0062] Thereby, when the holding portion 30 of the extraction bag 1H is folded in half at the double fold line L1 so that the notches 40A and 40B are snapped together, the length direction of the holding portion 30 becomes roughly vertical with respect to the upper and lower direction of the bag body 11 as shown in Figure 17A , the front end of the central protrusion 31 against the bag body 11 Therefore, the bag body 11 can be placed within the cup 100 smoothly.

[0063] When the hand is removed from the holding part 30 during extraction, as shown in Figure 17B, the front end 32 of the central protrusion 31 of the holding part 30 can be placed against the outer surface of the opening edge of the cup 100, so that the extraction bag 1H is locked in the cup 100 with the length direction of the holding part 30 tilted relative to the vertical direction of the bag body.

[0064] Alternatively, as shown in Figure 17C, the holding part 30 can be pulled up significantly from the bag body 11 with its length direction approximately parallel to the vertical direction of the bag body 11, and the extraction bag 1H can be secured to the cup 100 by placing the recess 33 of the holding part 30 on the opening edge of the cup 100. In this state, the fixing part 21 bends along the inner surface of the opening edge of the cup 100 by the longitudinal fold line L3, improving the stability of the suspension fixation state. Furthermore, when the holding part 30 is pulled up significantly, the suspension fixation state is stabilized by the slight opening of the tangent line C3' and the bending of the central protrusion 31.

[0065] The extraction bag 1I of the embodiment shown in the unfolded view of FIG18 is, relative to the extraction bag 1H described above, omitted the cutting line C3' in the central protrusion 31 of the holding part 30, and made the front end 32 of the central protrusion 31 continuous with the recess 24 of the bifurcation protrusion 23 of the fixing part 21.

[0066] The extraction bag 1I is also designed so that the free end of the retaining part 30 can be pulled up from the bag body 11 by folding the retaining part 30 in half and engaging the notches 40A and 40B, as shown in Figure 19, and can be placed into the cup 100 for extraction. When the retaining part 30 is pulled up further so that the length direction of the retaining part 30 is approximately perpendicular to the center line of gravity of the bag body 11, the volume of the bag body 11 is reliably expanded, which can promote extraction.

[0067] On the other hand, since the front end 32 of the central protrusion 31 of the holding part 30 is continuous with the recess 24 of the bifurcated protrusion 23 of the fixing part 21, even if the holding part 30 is pulled up in a manner in which the length direction of the holding part 30 is approximately parallel to the center line of gravity of the bag body 11, the recess 33 of the holding part 30 cannot be suspended and fixed to the opening edge of the cup 100. Based on the point that enables such suspension and fixation, it is preferable that, as in the extraction bag 1H described above, the front end 32 of the central protrusion 31 is separated from the recess 24 of the bifurcated protrusion 23 of the fixing part 21.

[0068] The extraction bag 1J of the embodiment shown in the unfolded view of FIG20 is, relative to the extraction bag 1H described above, omitted the cutting line C3' in the central protrusion 31 of the holding part 30 and reduced the degree of protrusion of the central protrusion 31 toward the bifurcated protrusion 23 of the fixing part 21.

[0069] The extraction bag 1J can also be pulled up from the bag body 11 by folding the holding part 30 in half and engaging the notches 40A and 40B. However, as shown in Figure 21A, even if the length direction of the holding part 30 is roughly perpendicular to the vertical direction of the bag body 11 when pulled up, the front end of the central protrusion 31 of the holding part 30 does not abut against the surface of the bag body 11. When pulled up, the angle formed by the length direction of the holding part 30 relative to the vertical direction of the bag body 11 can be increased arbitrarily.

[0070] When the hand is removed from the holding part 30 during extraction, as shown in FIG21B, the front end 32 of the central protrusion 31 of the holding part 30 can be placed against the outer surface of the opening edge of the cup 100, and the extraction bag 1J can be suspended and fixed to the cup 100 with the length direction of the holding part 30 set approximately horizontally.

[0071] Alternatively, as shown in Figure 21C, the holding part 30 can be pulled up significantly so that its length direction is roughly parallel to the vertical direction of the bag body 11, and the extraction bag 1J can be secured to the cup 100 by placing the recesses 33 on both sides of the central protrusion 31 of the holding part 30 on the opening edge of the cup 100.

[0072] The changes in the above-mentioned variations of the present invention can be appropriately combined.

[0073] 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J: Extraction bags 10: Permeable filtration sheets 11: Bag body 11a: Above 11b: Bottom edge 11u: Upper end of the bag body 20: Thin plate-shaped components 21: Fixing part 21a: The upper edge of both sides of the fixing part 22: Inverted trapezoidal cut 22a: Lower base of the inverted trapezoid 23: Forked protrusion 23a: Flexed edge (tangent line) 24: concave part 25: Reinforcement Department 30: Fixed Section 31: Central Prominence 32, 32a, 32b: The anterior end of the central protrusion 33: concave part 40A, 40B: Notch 41A, 41B: Straight sections 42A, 42B: Arc-shaped curved portion 43A, 43B: S-shaped bend 44A: Rectangular wave-shaped bend 50: Sheets for manufacturing extraction bags 100: cup A: Extraction materials / direction B: Hot water / direction C1,C2,C3,C3': tangent lines D1: Distance between the lower end of the V-shaped zigzag line and the front end of the holding part D2: Distance in the length direction between the lower end of the V-shaped zigzag line and the retaining part of the notch. L0: Center line of the width of the holding section L1: Fold line L2: V-shaped broken line L3: Vertical broken line L4: horizontal zigzag line Lz: The direction of the bag's body from top to bottom (the direction of the center of gravity). P: The center of the arc forming the lower edge of the retaining part. W1: Width of the retaining part W2: Width of the notch in the bag body α: The angle formed by the center lines of the straight portion of the notch and the width of the retaining portion.

Claims

1. An extraction bag having a bag body formed of a water-permeable filterable sheet, a thin plate-like member disposed on an outer surface of the bag body, and an extraction material filled within the bag body, and the bag body has 2 opposing sides, the thin plate-like member has a retaining portion disposed on one of the 2 faces of the foregoing, and a fixing portion adjacent to and fixed to the upper side of the bag of the holding portion. In relation to the holding portion, the upper end of the holding portion is fixed to the body of the bag, the lower portion of the holding portion is capable of being pulled up from the body of the holding portion, at least at the lower portion of the holding portion forming a double fold line dividing the width of the holding portion equally, at the lateral edges of the holding portion, a pair of notches are formed by folding and turning the width of the holding portion in half.

2. As in the extraction bag of claim 1, a pair of notches formed asymmetric with respect to the fold line of the fold so that the holding portion of the fold is snapped regardless of turning in either direction to the left or right.

3. As in the extraction bag of claim 2, wherein a pair of notches has a curved portion and a straight portion, respectively.

4. As in the extraction bag of claim 3, wherein the curved portion is circular arc.

5. As in the extraction bag of claim 3, wherein the curved portion is S-shaped.

6. As in the extraction bag of claim 1 or 2, wherein a cut having an inverted trapezoid is formed at the central portion of the upper edge of the fixing portion having a pair of longitudinal polylines extending at both ends of the lower base of the cut from the inverted trapezoid toward the bottom edge of the bag body.

7. The extraction bag of claim 1 or 2, wherein the thin plate-like member has a reinforcing portion extending from the left and right sides of the fixing portion to the bottom edge side of the bag body through a transverse fold line.

8. If the extraction bag of claim 1 or 2, wherein the upper edge of the central portion of the width of the holding portion is located on the side of the bottom edge of the more fixed portion against the body of the bag, the central portion of the width of the upper edge has a central protrusion projecting toward the upper edge of the bag body, having a concave portion on both sides, having an incisal portion between the central protrusion and the recessed portion and the fixing portion.

9. As in the extraction bag of claim 8, it forms an incision line having an equal division of the width of the central projection of the holding portion.

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