TWI864324B - Extraction bags - Google Patents

Abstract

[Topic] The present invention provides a bag for extraction, which can be opened into a perfect circle or nearly a perfect circle by simply standing a pair of hooks and locking them on the edge of a cup, and can stably maintain the opened state. [Solution] The bag for extraction of the present invention forms a slit on the hook (9) as a weak rigid part. The slit (35) is the part that bears the strongest tensile force and will be pulled outward. When the slit (35) is pulled outward, because the side area (37) of the slit (35) is pulled outward together with the surface part (3a) of the bag body (3), the surface part (3a) will expand outward to form a convex surface with the slit (35) as the center. If the position is offset from the center of the ear (9) to the left and right directions, the pulling force will be applied in the direction intersecting with the direction of the finger pulling. However, there is a wide band-shaped portion (25) there, and a slit (43) extending in an oblique direction is formed, so the slit (43) will be pulled outward in the same way as the slit (35). As a result, the surface portion (3a) will expand outward to form a convex surface with the slit (43) as the center. In this way, the opening edge (7) of the bag body (3) will form a nearly perfect circle. And maintain this open state.

Description

Extraction bags

The present invention relates to a bag for extracting coffee powder, tea leaves, etc., and more particularly to a bag for extracting coffee powder, tea leaves, etc., which is composed of a bag body and a hanging ear mounted on the bag body.

The extraction bag, which consists of a bag body made of a water-permeable material encapsulating coffee powder, tea leaves, etc., and a pair of ear loops made of thick paper fixed to the surface of the bag body, has been widely used. For example, the technical content disclosed in Patent Document 1 is such an extraction bag.

When using this extraction bag, first tear the upper end of the bag body to form an opening. Next, a pair of hanging ears are respectively erected and clamped on the edge of the cup to form a state in which the bag body is supported on the cup. In this state, part of the bag body and part of the hanging ears are placed in the cup, and the side part of the opening of the bag body is supported by the pair of hanging ears, so that the opening is kept open. After forming this state, the extraction liquid such as hot water is injected from this opening to perform extraction.

However, the bag for extraction disclosed in Patent Document 1 has a hanging ear with a portion extending in the left-right direction along the edge of the opening, so as to maintain the opening of the bag body in a larger state.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2010-110335

However, in this case, the opening of the bag body will become a quadrangle.

」字的方式注入熱水，藉此，想要讓整體咖啡粉都平均地被澆淋熱水而膨脹成圓形來進行悶蒸，因此，在包袋本體的角部，將會大量地殘留未經過萃取之大量的咖啡粉，因而會發生萃取不平均和不完全的情事。為了避免發生這種情事，最好是將開口形成正圓狀或接近正圓狀。 When extracting coffee powder, draw a line from the center of the bag opening toward the outside.

", so that the entire coffee powder is evenly poured with hot water and expanded into a round shape for steaming. Therefore, a large amount of unextracted coffee powder will remain in the corners of the bag body, resulting in uneven and incomplete extraction. To avoid this, it is best to make the opening into a perfect circle or a nearly perfect circle.

In addition, in order to meet the needs of convenience, it is best to open the opening into a perfect circle or a nearly perfect circle by simply standing a pair of hooks upright and locking them on the edge of the cup, and to stably maintain the open state.

This invention is developed with an eye on the problems of the above-mentioned conventional extraction bags, and its purpose is to provide a novel and practical extraction bag that can open its opening into a perfect circle or nearly a perfect circle by simply standing a pair of hooks and locking them on the rim of a cup, and can stably maintain the opened state.

The present invention is developed to solve the above-mentioned problems. The invention disclosed in claim 1 is an extraction bag, which comprises: a bag body in the form of a flat bag made of a water-permeable material; and a pair of ears respectively fixed to two surfaces of the bag body and used to be clamped to a container such as a cup, and the upper end of the bag body can be torn to form an opening, and the extraction liquid can be injected from the opening. The extraction bag is characterized in that the ears are formed of a rigid thin plate and have: a side reinforcement portion adhered and fixed to the edge of the opening, and a clamping portion provided on the lower side of the upper reinforcement portion. The upper side reinforcement part has a convex shape on the upper edge that is symmetrical on both sides, and is provided with: a main weak rigidity part extending from the top of the upper edge to the lower side to the middle of the lower edge; and a pair of oblique weak rigidity parts extending from the lower positions in the left and right directions of the upper edge to the lower side to the middle of the lower edge. If the respective stop parts of the pair of hanging ears are erected from the surface and stop on the edge of the container, the weak rigidity parts will be pulled outward together, so that the edge of the opening is opened into a perfect circle or a nearly perfect circle.

The invention of claim 2 is for the extraction bag described in claim 1, wherein one of the oblique weak rigidity parts of the upper side reinforcement part extends obliquely downward from the positions respectively descending in the left and right directions of the upper edge in a direction nearly orthogonal to the tangent line of the upper edge.

The invention of claim 3 is for the extraction bag described in claim 1 or claim 2, wherein the upper edge of the upper side reinforcement portion is formed with a gradual change edge that gradually descends from the top to the left and right sides, and the gradual change edge is separated by a main weak rigidity portion in the vertical direction and provided with a pair of weak rigidity portions in the vertical direction extending from the upper edge to the middle of the upper and lower edges before reaching the lower edge.

The invention of claim 4 is an extraction bag as described in any one of claims 1 to 3, wherein the upper edge of the upper reinforcement portion includes the range of 45° from the top and its left and right sides.

The invention of claim 5 is an extraction bag as described in any one of claims 1 to 4, wherein the upper side reinforcement portion is approximately arc-shaped.

The invention of claim 6 is for the extraction bag described in claim 5, wherein the left and right sides of the upper side reinforcement part are further connected outward in the left and right directions to form an outer side reinforcement part that is generally in an arc shape, and when the hanging ear overlaps the bag body, the outer edge of the outer side reinforcement part constitutes a part of the outer contour of the hanging ear.

The invention of claim 7 is for the extraction bag described in claim 6, wherein the outer reinforcing portion is in a strip shape and is provided with: a central reinforcing portion connected to the lower part of the left-right center of the outer reinforcing portion and extending in the vertical direction, and the outer reinforcing portion and the central reinforcing portion are both adhered and fixed to the bag body.

The invention of claim 8 is for the extraction bag described in claim 7, wherein the upper side reinforcement portion has: a wide band-shaped portion with a larger width, and the aforementioned oblique weak rigidity portion is provided therein.

The invention of claim 9 is for the extraction bag described in claim 7 or claim 8, wherein the ear is formed by connecting a rigid thin plate, and the locking portion is based on the lower side of the central reinforcement portion, extending upward from the left and right sides respectively, bending on the upper side and turning to the left and right sides respectively and connecting on the lower side, and can be erected in an inverted V shape.

The invention of claim 10 is for the extraction bag described in claim 9, wherein the aforementioned locking portion can be separated and erected from the aforementioned outer reinforcement portion and the aforementioned central reinforcement portion by a narrow slit.

The invention of claim 11 is for the extraction bag described in any one of claims 1 to 10, wherein the weak rigid portion is formed by: a narrow slit, a V-shaped or a U-shaped slit of the rigid thin plate of the ear.

According to the extraction bag of the present invention, the opening can be opened into a perfect circle or a nearly perfect circle by simply standing a pair of hooks upright and locking them on the edge of the cup, and the opening can be stably maintained.

The following is a diagram to illustrate the extraction bag 1 of the embodiment of the present invention.

In Figures 1 and 2, symbol 3 represents the bag body, which is made of a water-permeable material, such as a polyethylene fiber nonwoven fabric. The bag body 3 is formed into a rectangular flat bag shape by folding a rectangular sheet in half to form a bend, and then sealing the three sides other than the bottom of the bend. On the upper part of the bag body 3, a seam hole 5 parallel to the upper edge is provided as a breakable portion. If the upper end side is torn to open the bag using the seam hole 5, the bag body 3 will open as shown in Figure 3. Therefore, the place where the seam hole 5 was originally provided becomes the opening edge 7 (hereinafter referred to as the opening edge 7) as the edge of the opening of the bag body 3.

Coffee powder is sealed in the bag body 3 (omitted in the figure).

A pair of ears 9, 9 are fixed to the two surface parts 3a, 3a of the bag body 3. The ear 9 is made of a rigid sheet. As the material of the rigid sheet, paper, plastic, etc. can be used, and in this embodiment, a thick cardboard is used. The outer contour of the ear 9 is formed by punching, and the inner side of the ear 9 is separated and formed into multiple parts by narrow slits. Therefore, the cardboard on the inner side of the ear 9 does not have a surface defect. And all parts are connected together.

The ear hook 9 is made symmetrical in left and right directions, and is fixed on the lower side of the sewing hole 5 with its center line (L) aligned with the left and right center line of the surface part 3a of the bag body 3.

The following will explain the structure of each part of the ear hook 9.

Symbol 11 represents the outer reinforcement part. The outer edge 13 of this outer reinforcement part 11 is connected from the lower left side to the upper side and then to the lower right side to form an arc shape of more than 3/4. In this outer edge 13, from the top to the range of α (=45°) on its left and right sides, it constitutes a convex upper edge 13a. In this upper edge 13a, the descent degree of the top and its two sides is more gradual than the descent degree of the outer sides in the left and right directions, that is, it forms: a gradual change edge 13b with a larger curvature radius.

The left and right sides of the outer reinforcement part 11 are formed into a curved band shape, and inner edges 15, 15 are formed in a shape almost similar to the outer edge 13. The outer edge 13 and the inner edge 15 are connected together by a convex curved edge 17 that is convex toward the outside. Among the inner edges 15, 15, the part located on the inner side of the shape similar to the upper edge 13a constitutes the lower edge 15a, 15a.

The outer side reinforcement part 11 is formed by the upper edge 13a and the lower edges 15a, 15a as the upper and lower edges to form an upper side reinforcement part 19 extending in a strip shape along the opening edge 7 and with both ends falling. The lower part of the left-right center of the upper side reinforcement part 19 is connected to the central reinforcement part 21 extending in the upper and lower directions. In other words, the lower edges 15a, 15a of the upper side reinforcement part 19 are separated by this central reinforcement part 21.

The central reinforcement portion 21 extends downward, first becomes thinner in the middle, and then gradually expands in width downward. Therefore, the portion where the upper reinforcement portion 19 and the central reinforcement portion 21 are connected forms an inverse triangle area 23 having a certain degree of inverse triangle shape. In addition, the lower edge 15a of the upper reinforcement portion 19 and the longitudinal edge 21a of the central reinforcement portion 21 are connected together as if forming a concave curve. In addition, on the left and right outer sides of the gradual edge 13b, there is a wide strip-shaped portion 25 with a slightly larger width of the strip-shaped portion.

The outer reinforcement part 11 and the central reinforcement part 21, including their boundaries, are fully adhered and fixed to the bag body 3.

The lower end of the central reinforcement part 21 is extended in the left and right directions to form an inverted T-shape, and the locking part 27 is connected to the two left and right protruding parts. The locking part 27 is composed of a pair of arm pieces 29, 29, a pair of locking pieces 31, 31 and a removal part 33.

The locking portion 27 is in the shape of a serpentine belt, one end of which is connected to the left extension portion 21b at the lower end of the central reinforcement portion 21. After extending upward, it changes direction to the left and turns to the outside and extends downward, and then changes direction to the right and extends horizontally beyond the left-right center line (L). The right side is also formed in a relatively symmetrical shape, and the other end is connected to the right extension portion 21c at the lower end of the central reinforcement portion 21. The portions extending upward from the left and right extension portions 21b and 21c at the lower end of the central reinforcement portion 21 are equivalent to the arm pieces 29 and 29, and the portions extending downward after turning to the left and right outside are equivalent to the locking pieces 31 and 31. The portions connected horizontally are equivalent to the removal portion 33.

The arm piece 29 and the stopper piece 31 are sandwiched between the central reinforcement part 21 and the outer reinforcement part 11, and are kept separated by narrow slits. Therefore, when the hanging ear 9 is overlapped on the surface part 3a of the bag body 3, the outer edge 13 of the outer reinforcement part 11 and the convex curved edges 17, 17 and the outer edge 33a of the removal part 33 constitute the outer contour of the hanging ear 9. In addition, by the above-mentioned construction method, the stopper part 27 is set on the lower side of the upper reinforcement part 19.

The locking portion 27 is not adhered to the surface portion 3a of the bag body 3, so when the removal portions 33, 33 of the ear hooks 9, 9 are removed with fingers and pulled outward from each other, the locking piece 31 and the arm piece 29 are both erected as shown in FIG. 3, and the arm piece 29 and the locking piece 31 are opened into an inverted V shape.

The hanging ear 9 is made into the above-mentioned structure, and a weak rigid part is formed on the hanging ear 9 by using a narrow slit-like cut.

Symbol 35 is a slit that constitutes the main weak rigidity part in the up-down direction. This slit 35 extends from the top of the upper edge 13a directly downward. In other words, it extends toward the lower top corner of the inverse triangle area 23. The deep end 35a of the slit 35 is located very close to the imaginary line (A) that smoothly connects the two lower edges 15a and the lower edge 15a, and the lower side is close to the wider central reinforcement part 21.

The tangent lines across the upper edges 13a on both sides of the slit 35 are almost orthogonal to the direction in which the slit 35 extends upward and downward. In other words, if the slit 35 is regarded as the center line in the left-right direction, the side areas 37 on the left and right sides and the bottom are almost symmetrical.

Symbol 39 is a slit constituting a weak rigid portion for vertical assistance, and this slit 39 extends directly downward from the gradual change edge 13b. Therefore, the slit 39 extends in parallel with the slit 35. The length of the slit 39 is only about 1/2 of the length of the slit 35. Although the slit 39 is formed in the wide band-shaped portion 25, its deep end 39a is located above the lower edge 15a and is sufficiently far away from the lower edge 15a. In addition, the tangent lines of the gradual change edge 13b on both sides of the slit 39 are nearly perpendicular to the direction in which the slit 39 extends upward and downward. In other words, if the incision 39 is regarded as the center line in the left-right direction, the side areas 41 on the left and right sides and the lower side are almost symmetrical.

The slits 39 are provided in a pair symmetrically on the left and right.

Symbol 43 is a slit constituting an oblique weak rigid portion, and this slit 43 extends obliquely downward from the upper edge 13a located at a descending position outside the right-left direction of the gradual edge 13b in a manner close to the left-right center line (L). The inclination angle (θ) is about 30°. Although the length of the slit 43 is slightly longer than the length of the slits 39, because it is formed in the wide band-shaped portion 25, its deep end 43a is also located above the lower edge 15a and is sufficiently far away from the lower edge 15a. In addition, the tangents across the upper edges 13a on both sides of the slit 43 are nearly perpendicular to the direction in which the slit 43 extends obliquely. In other words, if the incision 43 is regarded as the center line in the left-right direction, the side areas 45 on the left and right sides and the lower side are almost symmetrical.

The slits 43 are provided in a pair symmetrically on the left and right.

In the above manner, slits 35, 39, 39, 43, 43 are formed on the ear 9.

This extraction bag 1 is opened by tearing the sewing hole 5, so the arm piece 29 and the locking piece 31 of the locking portion 27 of the ear hook 9 can be erected into an inverted V shape as shown in Figure 3.

Therefore, if the picking parts 33, 33 of a pair of hanging ears 9, 9 are picked up with fingers and pulled outwards from each other, the locking pieces 31, 31 and the arm pieces 29, 29 are erected, and the locking pieces 31, 31 are locked to the rim of the cup C, the state shown in FIG. 4 will be achieved, and the hanging ears 9 will be pulled. By utilizing the elasticity of the arm piece 29 and the locking piece 31, the hanging ears 9 can be stably hung on the rim of the cup C.

The slit 35 is the part directly subjected to the pulling force of the finger, so it will be pulled outward greatly. At this time, the side area 37 of the slit 35 is also pulled together with the surface part 3a of the bag body 3. Therefore, the surface part 3a will expand outward into a convex surface with the slit 35 as the center. Although the slit 35 can be lengthened, that is, deepened, a longer pulling distance can be obtained, but the surface part 3a will form a sharp angle with the slit 35 as the center.

Therefore, a pair of slits 39, 39 are provided. Although slit 39 is shorter than slit 35, surface portion 3a will expand outward into a convex surface with slit 39 as the center. The directions in which slit 39 and slit 35 are pulled outward are almost the same. Therefore, through the synergistic effect of slit 35 and slits 39, 39, it is possible to achieve the effect of forming a convex surface in the pulling direction of slit 35.

In addition, if the position is offset from the center of the ear 9 to the left and right directions, a force will be applied in a direction intersecting with the direction of being pulled by the fingers. However, the wide band-shaped portion 25 is located there, and the slit 43 is formed to extend obliquely, so it can be pulled outward in the same way as the slit 35. Therefore, the surface portion 3a also expands into a convex curved surface with the slit 43 as the center.

In order to open the opening edge 7 into a nearly perfect circle in the extraction bag 1, an optimized design is performed so that each slit can achieve a pulling distance corresponding to its respective position and a degree of expansion of the convex surface. Therefore, as shown in the schematic diagram of FIG5 , the opening edge 7 will form a nearly perfect circle.

Because the slit 35 is provided, the rigidity of the opening edge 7 side of the hook 9 becomes weaker, in other words, the straightness becomes softer, but the straightness of the hook 9 as a whole can still be fully ensured, so that it can stand upright on the cup C and stably maintain the opening edge 7 in an open state.

This extraction bag 1 is designed such that when used in the cup shown in FIG. 4 , the opening edge 7 is opened to a nearly perfect circle.

If the cup has different shapes and sizes, the degree of force on different parts will also be different. Therefore, based on the goal of being able to open the opening edge of the extraction bag into a nearly perfect circle on the cup you want to use, the shape and size of the earring board, the spacing and depth of the slits, the angle, etc. are used as adjustment parameters to design the most suitable weak rigid part.

The above is a detailed description of the implementation method of the present invention, but the specific structure is not limited to this implementation method. As long as the design changes are made within the scope of the gist of the present invention, they are also included in the present invention.

For example, in the above-mentioned embodiment, the weak rigidity portion is formed by a narrow slit, but it can also be a slit that forms a sewing hole. In addition, a V-shaped or U-shaped slit can be used instead of a narrow slit to form a weak rigidity portion.

In addition, the number of weak rigid parts can be increased. In addition, the thickness of the material constituting the ear 9 can be locally thinned to form the weak rigid part.

As long as the weak rigidity parts are arranged on the hook 9 in a symmetrical manner, the number is not particularly limited. For example, there can be 3 in total, including the center and a pair of left and right parts, or there can be 7 in total, including the center and three pairs of left and right parts. Therefore, the weak rigidity parts can be arranged in a variety of ways.

As described above, the weak rigidity part can be configured in various ways, so even if the shape of the hook 9 is changed, the opening edge can still be opened into a perfect circle or a nearly circular shape. For example, even if the outer reinforcement part 11 is separated from other parts, the convex shape of the upper edge of the hook 9 can be made into a shape where the whole does not form a bend, and only the left and right sides form a bend.

1: Extraction bag

3: Bag body

3a: Surface part

5: Sewing holes

7: Open mouth

9:Hanging ears

11: External reinforcement

13: External factors

13a: Upper Edge

13b: Slow change of fate

15: Inner Edge

15a: Lower edge

17: convex curved edge

19: Upper side reinforcement

21: Central Reinforcement Department

21a: kinship

21b, 21c: Extension part

23: Inverse triangle area

25: Wide band part

27: Stopper

29: Arm piece

31: Stopper

33: Extraction Department

33a: Outer edge

35: Cutting

35a: Deep end

37: Side areas

39: Cutting

39a: Deep end

41: Side areas

43: Cutting

43a: Deep end

45: Side areas

L: The left and right center line of the ear hook

A:Imaginary line

α: Range of upper reinforcement

θ: The inclination angle of the cut

C: cup

[Figure 1] is a plan view of the extraction bag before opening according to the embodiment of the present invention.

[Figure 2] is a picture after removing the reinforcement part from the ear hook in Figure 1.

[Figure 3] is a three-dimensional picture of the extraction bag in Figure 1 after it is opened.

[Figure 4] is a three-dimensional image of the extraction bag in Figure 1 hung on a cup.

[Figure 5] is a schematic diagram of the opening of Figure 4.

3: Bag body

3a: Surface part

7: Open mouth

27: Stopper

35: Cutting

39: Cutting

43: Cutting

C: cup

Claims (11)

An extraction bag comprises: a bag body in a flat bag shape made of a water-permeable material; and a pair of hanging ears respectively fixed to two surfaces of the bag body and used to be clamped to a container such as a cup, wherein the upper end of the bag body can be torn to form an opening, and an extract can be injected from the opening. The extraction bag is characterized in that the hanging ears are formed of a rigid thin plate and have: a side reinforcing portion adhered and fixed to the edge of the opening, and a clamping portion provided on the lower side of the upper side reinforcing portion, wherein the upper edge of the upper side reinforcing portion is in a left-right opposite position. The container is convex and has: a main weak rigidity portion extending from the top of the upper edge to the middle of the upper and lower edges before reaching the lower edge; and a pair of oblique weak rigidity portions extending from the lower positions in the left and right directions of the upper edge to the middle of the lower edge before reaching the lower edge. When the respective stop portions of the pair of hanging ears are erected from the surface and stop at the edge of the container, the weak rigidity portions will be pulled outward together, so that the edge of the opening is opened into a perfect circle or a nearly perfect circle. The extraction bag as described in claim 1, wherein one of the pair of oblique weak rigidity parts of the upper side reinforcement part extends obliquely downward from the respective descending positions in the left and right directions of the upper edge in a direction nearly orthogonal to the tangent line of the upper edge. The extraction bag as described in claim 1 or claim 2, wherein the upper edge of the upper side reinforcement portion is formed with a gradual change edge that gradually descends from the top to the left and right sides, and the gradual change edge is separated by a main weak rigidity portion in the vertical direction and provided with a pair of weak rigidity portions in the vertical direction extending from the upper edge directly downward to the middle of the lower edge before reaching the lower edge. The extraction bag as described in claim 1 or claim 2, wherein the upper edge of the upper reinforcement portion includes the range of 45° from the top and its left and right sides. The extraction bag as described in claim 1 or claim 2, wherein the upper side reinforcement portion is approximately arc-shaped. As described in claim 5, the extraction bag, wherein the left and right sides of the upper side reinforcement part are further connected outward in the left and right directions to form an outer side reinforcement part that is generally in an arc shape, and when the hanging ear overlaps the bag body, the outer edge of the outer side reinforcement part constitutes a part of the outer contour of the hanging ear. As described in claim 6, the extraction bag, wherein the outer reinforcement part is in the shape of a strip, and is provided with: a central reinforcement part connected to the lower part of the left-right center of the outer reinforcement part and extending in the vertical direction, and the outer reinforcement part and the central reinforcement part are both glued and fixed to the bag body. The extraction bag as described in claim 7, wherein the upper side reinforcement portion has: a wide band-shaped portion with a larger width, and the aforementioned oblique weak rigidity portion is provided therein. As in claim 7, the bag for extraction, wherein the ear is formed by connecting a rigid thin plate, and the stopper is based on the lower side of the central reinforcement, extending upward from the left and right sides respectively, bending to the left and right sides respectively on the upper side and connecting to the lower side, and can be erected in an inverted V shape. The extraction bag as described in claim 9, wherein the aforementioned locking portion is separated and erected from the aforementioned outer reinforcement portion and the aforementioned central reinforcement portion by a narrow slit. The extraction bag as described in claim 1 or claim 2, wherein the weak rigid portion is formed by: a narrow slit, V-shaped or U-shaped slit in the rigid thin plate of the ear.

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