JP2001063756A - Extraction bag having top and base gussets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extraction bag which expands during extraction and exhibits high extraction effects from a single water permeable filtration sheet in a simple form. SOLUTION: Shorter ends of a rectangular water permeable filtration sheet are joined to form a joined body having front and rear surfaces which connect at upper and lower ends. The connected upper and lower ends are folded inward, and both side ends of the folded body are joined and sealed to form a bag-like body 10. The extraction bag includes the bag-like body 10 and a material to be extracted which is received in the bag-like body, wherein gussets are formed on a top and a base of the body 10 by upper and lower folded portions, and an end of a tag thread with a tag piece is stuck to the upper folded portion when needed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extraction bag having top and bottom gussets. More specifically, the present invention has a bag-like body formed from a single piece of water-permeable, filterable rectangular sheet and having a gusset at the top and bottom, which expands during water extraction and exhibits a high extraction effect. The present invention relates to an extraction bag having a top and a bottom gusset.

[0002]

2. Description of the Related Art Conventionally, an extraction bag has a material to be extracted contained and sealed in a double-sided bag-like body having a front part and a back part formed of a water-permeable filter sheet. For example, immersing in, for example, hot water to extract an extract-soluble component into an extract from a material to be extracted is performed. As described above, the two-sided bag-shaped extraction bag has a small increase in its internal volume in the extraction liquid. Therefore, the material to be extracted is sufficiently swung in the bag-shaped body, and the extraction cannot be promoted. There was a problem that.

[0003] In order to solve the above problems, it has been attempted to provide a gusset on both sides and / or the bottom of the extraction bag, but since the tag yarn is attached to the gusset-free top, There is a problem that the size of the bag-shaped body during the extraction operation is insufficient, and the manufacturing process is complicated and the cost is increased.

[0004] An extraction bag using a bag-like body having gussets formed at the top and bottom is also known. However, the shape of the bag is complicated, and thus the manufacturing process is complicated and the manufacturing cost is increased. There is.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a top and bottom portion comprising a bag formed from a water-permeable filter sheet having a simple shape and capable of sufficiently expanding in an extract to provide a high extraction effect. It is intended to provide an extraction bag having a gusset.

[0006]

The extraction bag having the top and bottom gussets of the present invention is formed by a joined body in which short side ends of a water-permeable and filterable rectangular sheet are joined to each other by abutting or overlapping, and continuous at upper and lower ends. A bag-like body having a front part and a back part, and a material to be extracted contained in the bag-like body. In the bag-like body, the upper and lower continuous ends are folded inward. The front, back and upper and lower folded portions of the body are bonded and sealed to each other, and a top gusset and a bottom gusset are formed in the bag-like body by the upper and lower folded portions. It is characterized by having. In the extraction bag of the present invention, it is preferable that one end of a tag thread is joined to the upper folded portion, and a tag paper piece is joined to the other end of the tag thread. In the extraction bag of the present invention, it is preferable that the ratio L / W of the length L and the width W of the bag-shaped body is in the range of 0.5 to 1.5. In the extraction bag of the present invention, it is preferable that the ratio W / D of the width W of the bag-like body to the depth D of the folded portion is in the range of 2.0 to 30.0.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The extraction bag having top and bottom gussets of the present invention can be manufactured as follows.
In FIG. 1, a water-permeable and filterable rectangular sheet 1 is bent in an annular shape, and short-side ends thereof are abutted or overlapped and joined to form a joint 2. The upper and lower ends 3a and 3b of the annular joined body when folded on the two-layer body are folded inward and folded. The folded body thus formed is
It consists of a front part 4, a back part 5, an upper folding part 6a, and a lower folding part 6b. The upper folding part 6a and the lower folding part 6b are formed into four layers together with the upper end part and the lower end part of the front part 4 and the back part 5. In the middle between the upper and lower folded portions 6a and 6b, an intermediate portion between the front portion 4 and the rear portion overlaps in two layers.

FIG. 2 (A) shows the folded body having such an overlapped structure when the side edges facing each other are joined and sealed.
And (B) is obtained. FIG.
(A) (front view) and FIG. 2 (B) (Y-Y in FIG. 2 (A)).
In the cross-sectional view taken along the line), the water-permeable filterable rectangular sheets are joined to each other at their short sides by abutting or overlapping each other to form a joining line 2, and the front part 4 and the rear part 5 and the upper end folded part 6a, A lower end folded portion 6b is formed, and the opposing side edges are joined to each other to form a bag-like body 10. Upper and lower folded portions 6a, 6
b can form the top gusset and the bottom gusset of the bag 10.

A material to be extracted (not shown) is housed and sealed in the extraction bag of the present invention. In the extraction bag of the present invention, as shown in FIG. 2 (A), the tag yarn 11 is formed at the upper folded portion 6a (top gusset) of the bag-like body 10.
Is glued to one end and the tag paper piece 12 is glued to the other end. The tag paper piece 12 may be peelably joined to the front part 4 or the back part of the bag-like body 10. In FIG. 2B, the description of the tag yarn and the tag sheet is omitted.

When the tag paper strip 12 is peeled off from the bag-like body, the bag-like body 10 (containing the material to be extracted) is suspended by the tag yarn 11, and immersed in an extraction liquid (for example, hot water).
As shown in the figure, the bottom of the upper fold 6a adhered to one end of the tag thread 11 is lifted upward by the weight of the material-to-be-extracted containing bag-like body 10 to enlarge the top of the bag-like body 10. Accordingly, the front part and the back part are also separated from each other, and the bottom of the lower folded part 6b is pushed down to enlarge the bottom of the bag-like body, thereby increasing the volume of the bag-like body. When the bag-like body 10 is expanded in this way, the floating space of the material to be extracted contained therein is increased, and the extraction effect is improved.

In the bag of the extraction bag of the present invention, the ratio L / W of the length L to the width W is preferably in the range of 0.5 to 1.5, and 0.8 to 1.2. Is more preferably within the range. When the ratio L / W is less than 0.5, the width of the bottom of the bag-shaped body becomes excessively large at the time of extraction in the container, and it becomes difficult to swing and stir the bag-shaped body in the container,
When the ratio L / W is more than 1.5, the length of the bag-like body becomes excessively large at the time of extraction in the container, and the bottom of the bag-like body may become insufficient. Contacting the bottom of the container, or the bottom of the bag is bent,
In some cases, the extraction effect of the material to be extracted in the bag is insufficient.

In the bag of the extraction bag of the present invention, the ratio W / D of the width W to the depth D of the upper and lower folded portions is preferably in the range of 2.0 to 30.0, 3.
More preferably, it is in the range of 0 to 10.0. Ratio W
If the value of / D is less than 3.0, the value of D becomes relatively too large, and the gussets are likely to overlap. When the body enlargement becomes insufficient and the volume of the bag-like body becomes too small, and when it exceeds 30.0, the value of D becomes relatively small and the bag-like body becomes It may not be able to expand sufficiently, and only a volume expansion similar to that of a conventional flat bag-shaped body may be obtained.

The water-permeable filter sheet forming the bag-like body is a highly water-resistant filter sheet, for example, a filter paper, a synthetic fiber such as a polyolefin fiber such as a polyethylene fiber and a polypropylene fiber, and a polyester fiber. Synthetic fiber non-woven fabrics produced from thermoplastic synthetic fibers such as polyamide fibers by melt blow method, spun bond method, thermal bond method, etc., and mixed paper sheets containing these heat-bondable thermoplastic synthetic fibers (in the sheet) Synthetic fibers and pulp fibers are heat-sealed at the intersections thereof), and a mesh sheet made of the above-mentioned synthetic resin monofilament. These may be used alone, or two or more of them may be used. May be used as a complex. In the water-permeable filter sheet,
Since the nonwoven fabric containing polyethylene fibers and / or polypropylene fibers prevents leakage of fine particles contained in the material to be extracted and appropriately absorbs fats and oils in the extracted liquid,
An extract having an excellent taste, aroma and flavor can be obtained, and thus is preferably used in the present invention.

The water-permeable filterable sheet is cut into a rectangular shape to form a bag of a desired shape, and is used for forming the bag. The material to be extracted may be any of green tea, black tea, various types of Chinese tea, other extracted beverages, and the like, and the particle shape and size thereof can be appropriately set. The material to be extracted is stored in the bag from the unjoined opening after one side edge is joined in the step of forming the bag, and then the unsealed opening side edge is joined and sealed. . Further, the tag yarn bonded to the tag paper piece may be previously bonded to a predetermined position of the rectangular sheet, or may be disposed and bonded during or after the formation of the bag-shaped body.

[0015]

According to the extraction bag of the present invention, the bag-like body is
The bag-like body can be extracted during the extraction operation because it can be formed from a single water-permeable and filterable rectangular sheet, and the top and bottom are formed with a gusset that allows the bag-like body to expand. The material to be extracted, which expands in the liquid and is contained in the bag-shaped body, can sufficiently move in the extraction liquid to improve the extraction effect, and thus has extremely excellent practicality.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing a configuration of a bag-like body of an extraction bag according to the present invention before side edge portions are joined.

2 (A) is an explanatory front view of the extraction bag of the present invention, and FIG. 2 (B) is an explanatory sectional view taken along line YY of the bag-like body of the extraction bag of FIG. 1 (A). .

FIG. 3 is an explanatory perspective view showing an enlarged state of the extraction bag of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Permeable filterable rectangular sheet 2 ... Joining part 3a, 3b ... Upper and lower end part 4 ... Front part 5 ... Back part 6a, 6b ... Upper and lower part folding part 10 ... Bag-shaped body 11 ... Tag thread 12 ... Tag paper piece L ... Bag Shape length W: Width of bag shape D: Depth of folded part

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AA05 AA13 AB11 AB21 BA01 BA03 BA24 BA26 BA30 BA36 BA54 BC04 BC18 BC20 FA06 GA02 HL09 HN32 3E067 AA05 AB24 BA12A BB06A BB14A BB15A BB16A CA07 CA08 CA24 EE16 4B004

Claims (4)

[Claims] 1. A bag-like body which is formed by a joined body in which short side ends of a water-permeable and filterable rectangular sheet are butted or overlapped with each other and joined to each other, and has front and rear portions continuous at upper and lower ends, and a bag-like body. The upper and lower continuous ends of the bag-shaped body are folded inward, and the front, back and upper and lower folded portions of the folded body oppose each other. Each of the edges
An extraction bag having a top / bottom gusset, wherein a top gusset and a bottom gusset are formed and sealed in the bag-like body by the upper and lower folded portions. 2. The extraction bag according to claim 1, wherein one end of a tag thread is joined to the upper folded portion, and a tag paper piece is joined to the other end of the tag thread. 3. The extraction bag according to claim 1, wherein a ratio L / W of a length L to a width W of the bag-like body is in a range of 0.5 to 1.5. 4. A ratio W / D of a width W of the bag-like body to a depth D of the folded portion is in a range of 2.0 to 30.0.
The extraction bag according to claim 1.