JP2000152875A - Filtering bag provided with hanging thread, manufacture thereof, and manufacturing device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtering bag provided with a hanging thread in which the hanging thread will not become an obstacle when it is stacked and packaged by automatically stacking and packing them by a machine, a manufacturing method thereof, and a manufacturing device thereof. SOLUTION: In a filtering bag 1 provided with a hanging thread, the hanging thread 20 is installed on a filtering bag main body 10 by sewing by a sewing machine capable of removing the thread, one end side of the hanging thread 20 is fixed, and the other end of the hanging thread 20 is kept unfixed in such a way that the thread 20 can be freely removed. The hanging thread 20 will not become an obstacle, therefore, when the filtering bag is stacked, or when a stacked body of the filtering bags is packaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to Japanese tea, black tea,
The present invention relates to a strainer bag with a hanging thread attached to a strainer bag body capable of accommodating tea leaves such as coffee powder and the like, and a method and apparatus for manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, a filter bag with a hanging thread as shown in FIGS. 11 and 12 has been known. In this conventional filter bag W ′ with a hanging thread, a filter bag body 110 is formed with a filter material having water permeability and water resistance, and the filter bag body 110 is formed.
And one end of the hanging string 120 is fixed. or,
To the other end of the hanging string 120, a knob piece 125 is attached.

[0003] The filter bag body 110 is continuously manufactured by a heat seal bag making machine. That is, first, the band-shaped filter medium continuously fed out from the filter medium roll is width-folded to form a bag portion, and then the width-folded band-shaped filter medium is heat-sealed at an interval of one filter bag body (in the case of FIG. 11). Two heat-sealed portions are formed in proximity to one place), and then the two heat-sealed portions formed close to each other are cut to form a rectangular shape in which heat-sealed portions 113 and 114 are formed on both side edges, respectively. The filter bag main body 110 is formed. still,
In FIGS. 11 and 12, reference numeral 116 denotes a filter bag main body 1.
Reference numeral 10 denotes an opening, and 117 denotes a folded lid that closes the opening 116.

[0004] Further, a conventional filter bag with hanging thread W 'shown in Fig. 11 is a filter bag body 11 manufactured by a heat seal bag-making machine.
The hanging thread 2 (with the knob piece 125) is attached to 0 in a separate step to complete it. And this strainer bag W 'with a hanging thread is
A predetermined number is packaged together (in a laminated state) and shipped.

[0005] To use the conventional strainer W 'with a hanging thread, tea leaves Q are stored in a strainer bag main body 110 as shown in FIG. Then, the knob piece 125 is pinched and suspended, and the strainer bag body 110 containing the tea leaves is immersed in boiling water in a container 100 such as a teapot. Then, when the tea is finished, the knob piece 125 may be pulled up and the filter bag body 110 containing tea leaves may be pulled out.

[0006]

However, the conventional drawer bag W 'with a hanging thread shown in FIGS. 11 and 12 has the following problems.

(1) Since it is necessary to attach the hanging thread 120 for hanging the strainer bag body 110 in a process different from the process of manufacturing the strainer bag body 110, the process of manufacturing the strainer bag with the strainer thread becomes complicated. , Manufacturing efficiency is poor.

[0008] (2) A predetermined number of this type of bag with a hanging thread is packed and shipped in a state in which the hanging thread 120 (and the knob piece 125) is stacked and packed. Is troublesome, and lamination and packaging operations take a long time, and automation of the lamination and packaging processes by a machine is extremely difficult.

(3) A knob piece 125 is attached to the tip of the hanging thread 120.
Is attached, it becomes easy to pinch the tip of the hanging thread at the time of tea brewing, but it takes time to attach the knob piece 125 and the attaching work is troublesome.

The present invention has been made in view of the above-mentioned problems of the conventional bag with a hanging thread, so that the hanging thread is not in the way of laminating and packing the bag and the bag can be automatically laminated and packed by a machine. It is an object of the present invention to provide a strainer with a hanging thread, a method for producing the bag, and a device for producing the bag.

[0011]

The present invention has the following structure as means for solving the above-mentioned problems.

[0012] The invention of claim 1 of the present application is directed to a strainer bag with a hanging thread attached to a strainer bag body capable of accommodating tea leaves.

The filter bag body is a web-like filter material having heat welding property, water permeability and water resistance, and is formed in a rectangular bag shape having a long side length of 90 mm and a short side length of about 70 mm. The size of the bag body is not particularly limited, and can be appropriately changed in design.

The filter bag body has an opening on one side of the long side, and the opening can be turned back and closed with a lid. The filtering bag body has a three-layered structure of a bag portion (two layers) and a folded lid, a four-layered material having a folded piece formed at the opening edge of the opening on the side opposite to the folded lid, and the like. 3 layers or 4
A suitable structure such as a gusset-folded portion formed at the bottom of the filter bag body of the layer) can be adopted. In addition, this filter bag body can be continuously manufactured by a conventional heat seal bag making machine.

In the bag with a hanging thread according to the first aspect of the present invention, the hanging thread is attached to a predetermined length range of a proper position of the bag body by a single sewing thread. The hanging string may be attached at an appropriate position on the main body of the filtering bag, but it is preferable that the hanging thread be formed so as to extend in the long side direction of the main body of the filtering bag. The stitches of the sewing machine can be easily formed by a sewing machine having a single chain sewing or a double chain sewing function. In addition, the hanging thread that has been sewing-stitched has a feature that the seam is sequentially released by pulling one end thereof, so that the thread can be easily removed.

[0016] The hanging thread sewn in a single loop is sewn only at one end side and fixed to the bag body, while allowing the thread to be pulled out from the other end side to the fixing portion. The fixing portion at one end of the hanging string can be heat-welded to the filter medium at the same time as, for example, forming the heat seal portion on the side edge of the filtering bag main body. In this case, if a heat-fusible yarn (for example, made of nylon) is used as the suspending yarn, it will be strongly bound to the filter medium (heat-meltable) during heat sealing. In the case where one end of the hanging thread is fixed by the heat sealing at the time of heat-sealing the filter medium, the other end of the hanging thread is not heat-sealed (for example, the other end of the hanging thread corresponds to the other end using an intermittent heater). A non-sealed portion is formed in a small length portion).

Further, the fixing portion at one end of the hanging thread may be bonded to the filter medium by hot melt separately from the heat seal of the filter medium. In this case, in the manufacturing process, the band-shaped filter medium is width-folded for forming the bag portion, and heat-sealed for each of the filter bag bodies sequentially, and then sewn with a sewing machine in a length direction of the heat-sealed band-shaped filter medium, Then, the portion where the one end of the hanging thread is located in the filtering bag main body is fixed by hot melt, or the portion where the one end of the hanging thread is located after the heat-sealed band-shaped filter material is filtered and cut for each bag main body. You may make it adhere with a melt. In the case where one end of the hanging thread is fixed to the filter medium with a hot melt, there is no problem even if a thread having a low heat-melting property such as cotton thread is used as the hanging thread.

As described above, in the bag with the hanging thread according to the first aspect of the present invention, the sewing machine (single-ring sewing or double-ring sewing) in which the entire length of the hanging thread can be removed from the bag body in the product state.
Therefore, even in the case of a filter bag with a hanging thread, it is easy to handle the final shipping form (a form in which a large number of sheets are packed in a stacked state). Further, when using the strainer with a hanging thread, when the end of the non-fixed side of the hanging thread is pulled, the seam is gradually released, and the hanging thread can be used as one hanging thread with the other end fixed.

According to a second aspect of the present invention, there is provided a filter bag with a hanging thread according to the first aspect of the present invention, wherein the knob piece made of a small piece of the adhesive tape is attached to the thread removing side end of the hanging thread and the filtering bag. It is characterized in that it is adhered to the outer surface of the main body.

According to the second aspect of the present invention, since the knob piece is adhered to the main body of the hanging bag in a state where the knob piece covers the end portion of the hanging thread on the yarn removing side, the end portion of the hanging thread on the yarn removing side is provided. Can not be solved carelessly. Further, when the knob piece is filtered and peeled off from the bag body, the seam of the hanging thread is sequentially released while the thread removing side end of the hanging thread is adhered to the knob piece.

[0021] The invention of claim 3 of the present application is directed to the method of manufacturing the filter bag with a hanging thread according to claim 1 above. And this claim 3
Is performed as follows.

First, a band-shaped filter medium (made of a heat-weldable web) is continuously fed out from the filter medium roll, and one hanging thread is continuously sewn along the length direction of the band-shaped filter medium with a sewing machine (thread removal is possible). Single chain stitch or double chain stitch). It is preferable to use a heat-fusible yarn as the hanging yarn. or,
According to the third aspect of the present invention, it is preferable that the hanging thread is sewn on a portion located on the lid when the filter medium is filtered and formed into a bag. still,
The hanging thread is continuously sewn with a sewing machine while continuously feeding the band-shaped filter medium.

Next, the band-shaped filter medium with a thread is width-folded to form a bag portion. This width-folding operation is performed by a conventional method using a folding plate of a conventionally used heat-sealing bag making machine, and the band-shaped filter medium is folded in two for forming a bag portion, and a folded lid is formed at an opening. The width-folded shape can be an appropriate structure such as the above-described four-layer fold or a gusset-folded bottom. At this time, the band-shaped filter medium is folded in a state where the hanging string is exposed on the outer surface of the width-folded band-shaped filter medium.

Next, the thread-width-folded band-shaped filter medium is heat-sealed for each of the filtering bag bodies. At this time, one of the heat seal portions formed on both side edges of the filter bag main body fixes the suspending thread to the filter medium, while the other heat seal section fixes the suspending thread to the filter medium. The state is fixed. That is, one heat seal portion is
Adhered to the entire width of the band-shaped filter media together with the hanging thread (thermal welding)
On the other hand, the other heat-sealing portion fixes (heat-welds) the band-shaped filter medium in an intermittent state except for the hanging thread portion.

Then, the heat-sealed band-shaped filter medium is formed by forming a heat-sealing portion on the side of a hanging string at one side edge of the filtering bag main body and not fixing the hanging thread to the other side edge of the filtering bag main body. Cut so that the heat-seal part on the side is formed and cut off the strainer bag with the hanging thread.

The bag with the hanging string thus manufactured is laminated in a predetermined number in the next step, and then the stacked bag is packaged as a whole. Since the sewing thread is sewn on the sewing machine, the hanging thread does not obstruct the laminating operation and the packaging operation, and these operations (the laminating operation and the packaging operation) can be automated (mechanical processing).

[0027] The invention of claim 4 of the present application is also directed to the method of manufacturing the filter bag with a hanging thread of claim 1 above. And this claim 4
According to the invention, the order of the sewing operation and the width folding operation in the manufacturing method of the third aspect is reversed. That is,
According to a third aspect of the present invention, the hanging filter is width-folded after the hanging thread is sewn on the band-shaped filter medium before the width folding. After width-folding, one hanging thread is continuously sewn on the width-folding band-shaped filter medium in the length direction (sewing-separable single-ring sewing or double-ring sewing). The subsequent operations (heat sealing operation, cutting operation) in claim 4 are the same as those in claim 3.

In the method for manufacturing a filter bag with a hanging thread according to the fourth aspect of the present invention, the hanging thread is sewn on a band-shaped filter material which has been folded in width. Although the inside of the main body is closed with a hanging string, this hanging string is unraveled at the time of use (the inside of the strainer bag body is opened), so there is no problem.

The invention according to claim 5 of the present invention is directed to the method for manufacturing a filter bag with a hanging thread according to claim 3 or 4, wherein the heat-sealed band-shaped filter medium is cut from a small piece of the adhesive tape before cutting. The knob piece is adhered to the outer surface of the filter medium in a state where the hanging thread portion in the heat seal portion on the side where the hanging thread is not fixed is covered. The manufacturing method according to claim 5 is for manufacturing the filter bag with a hanging thread according to claim 2 described above.

[0030] The invention of claim 6 of the present application is directed to a manufacturing apparatus for manufacturing the filter bag with a hanging thread of claim 1 above. The apparatus for manufacturing a filter bag with a hanging thread according to the sixth aspect of the present invention includes a feeding device for continuously feeding the band-shaped filter medium from the filter medium roll and a sewing thread for sewing one hanging thread continuously in the longitudinal direction of the band-shaped filter medium. A sewing machine that performs (single or double chain stitching with thread removal), a fold plate that widthwise folds the band-shaped filter medium to form a bag section, and heats the width-folded band-shaped filter medium with thread one by one in each filter bag body It comprises a heat sealing device for sealing, and a cutting device for cutting the heat-sealed band-shaped filter material together with the hanging thread and separating the filter bag with the hanging thread.

The feeding device continuously feeds the band-shaped filter medium from the filter medium roll, and a belt feeding type conventionally used can be adopted. Further, a conventional folding plate for width folding can be used.

The sewing machine continuously performs sewing on a band-shaped filter medium that is sequentially and continuously fed, and employs a sewing machine having a single-ring sewing or a double-ring sewing function.
Note that, as the suspending thread, a thread having heat melting property may be used. The sewing machine may be installed above the folded plate, or may be installed below the folded plate. In the case where the sewing machine is installed on the upper side of the folded plate, the hanging thread is sewn to the band-shaped filter medium before the width folding fed from the filter medium roll as in the manufacturing method of the third aspect. On the other hand, when the sewing machine is installed on the lower side of the folded plate, the hanging thread is sewn on the band-shaped filter medium after the width folding as in the manufacturing method of the fourth aspect.

The heat-sealing apparatus heat-welds the band-shaped filter medium together with the hanging thread, and employs a pair of heat rolls. Further, in this heat sealing device, one of the heat seal portions formed on both side edges of the filter bag main body fixes a hanging thread to the filter material (heat welding).
On the other hand, the other heat-sealing portion is configured so that the hanging thread is not fixed to the filter medium.

As the cutting device, a pair of blade rolls is used. In this cutting apparatus, the heat-sealed band-shaped filter medium is formed by forming a heat-sealing portion on one side edge portion of the strainer bag main body on the side where the hanging thread is fixed, and a non-hanging thread portion on the other side edge portion of the strainer bag main body. The bag is cut so as to form the heat-sealed portion on the fixed side, and the bag with the hanging thread is sequentially cut off. It should be noted that the sewing machine sewing by single chain stitching or double chain stitching has a feature that, when the sewing is cut in the middle, the seam can be sequentially released from the cut end. And
In the bag with the hanging thread separated by the cutting device, one end of the sewing thread stitched to the sewing machine is fixed to the filter medium by one heat sealing portion, and the other end of the hanging thread is in a non-fixed state. Therefore, the thread can be sequentially removed from the end of the hanging thread on the non-fixed side.

In the manufacturing apparatus according to the sixth aspect of the present invention, the hanging thread can be attached to the belt-shaped filter medium by a sewing machine capable of pulling out the thread, so that even a filter bag with the hanging thread can be mechanically continuously manufactured. . In addition, although the bag with the hanging thread manufactured by this manufacturing apparatus is packed and shipped in a state where a predetermined number of the bags are stacked, even the bag with the hanging thread is used during the laminating operation or the packaging operation. In this case, the hanging thread does not interfere, and the process up to the final packaged product can be mechanized.

The invention according to a seventh aspect of the present invention is directed to the apparatus for manufacturing a filter bag with a hanging thread according to the sixth aspect, wherein the knob made of a small piece of adhesive tape is cut before cutting the heat-sealed band-shaped filter medium. There is provided a knob piece supply device for adhering the piece to the outer surface of the filter medium in a state where the piece covers the end of the hanging thread on the non-fixed side.

In this knob piece supply device, an adhesive tape is fed out from a tape roll, and the leading end side thereof is sequentially cut by a small length (knob piece length), and each of the small pieces is successively suspended in a heat-sealed band-shaped filter medium. Is supplied to a position to cover each non-fixed side end so that the small piece can be adhered to the filter medium with the adhesive applied to each small piece.

Therefore, in the manufacturing apparatus according to the seventh aspect, the knob piece of the hanging thread can be automatically attached during the manufacture of the strainer with the hanging thread. At the time of use, when this knob piece is peeled off from the filter medium, the end of the hanging thread is pulled out while the non-fixed side end of the hanging thread is adhered to the adhesive applied surface of the knob piece, and the end of the hanging thread is specially attached. There is no need to pick.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
To describe the embodiment of the present application, FIGS. 1 to 3 show a filter bag W with a hanging thread of the embodiment of the present application, and FIG. 4 shows a laminated filter bag X obtained by laminating a large number of the filter bags W with a suspending thread. Packaging material Y
FIG. 5 and FIG. 6 show a manufacturing apparatus for manufacturing a filter bag W with a hanging thread, and FIG. 7 shows a process chart until manufacturing the packaged product Z. Is shown. FIG. 8 shows a modification of the manufacturing process of FIG. 7, and FIGS. 9 and 10 show modifications of the heat-sealed portion, respectively.

The filter bag W with a hanging thread shown in FIGS.
The hanging bag 2 is attached to a strainer bag main body 1 capable of storing tea leaves.

As the filter material of the filter bag body 10, a web-like material (for example, non-woven fabric) having heat welding property, water permeability and water resistance is used. The filtering bag body 10 is formed in a rectangular bag shape by heat sealing (reference numerals 13 and 14) the side edges 12 and 12 in a state where the filtering material is folded.
The filtering bag body 10 has a size of, for example, a long side length of about 90 mm and a short side length of about 70 mm, and forms a bag portion 11 capable of accommodating tea leaves therein. In addition, a folding lid 17 is provided in the opening 16 of the filtering bag main body 10. After the tea leaves are stored in the bag 11 in the same manner as in the conventional example of FIG. Close and use. The size of the filter bag body 10 can be appropriately changed in design, and the folded shape is not limited to the illustrated example, and a folded piece is formed at the opening edge of the opening 16 on the side opposite to the folded back side of the opening 16. Any suitable structure, such as a single-layer structure or a gusset-folded portion formed at the bottom of the filter bag body 10 (three or four layers), can be employed.

Further, one side (FIG. 1)
To the left side of FIG.
Is formed continuously over the entire width of
To the right side of FIG.
Intermittent part (non-seal part) 14a at the position corresponding to 0
Is formed. In the following description, the filter bag body 10 is used.
May be referred to as a continuous heat seal portion, and the heat seal portion 14 having the opposite intermittent portion 14a may be referred to as an intermittent heat seal portion.

The suspending thread 20 is a single thread having heat melting property. In this embodiment, the hanging thread 20 is sewn with a sewing machine (single-ring sewing or double-ring sewing capable of removing a thread) over the entire length of the folded lid 17 of the bag body 10 in this embodiment. This sewing machine can be easily formed by the sewing machine 2 having the function of single chain sewing or double chain sewing shown in FIGS. In addition, the hanging thread 20 sewn by the sewing machine is used.
Are cut off at the time of separating the strainer W with a hanging thread as described later. Accordingly, the hanging thread 20 sewn with the sewing machine (single chain sewing or double chain sewing) has one end (reference numeral 23).
The seam is gradually released by pulling the part (1), and the thread can be easily removed. In the case of single-ring sewing, the actual length of the hanging thread is about three times the length of the sewing state.

In this embodiment, the hanging thread 20 sewn with the sewing machine is filtered only at one end (the left end in FIGS. 1 to 3) and heat-sealed to the bag body 1 (heat-sealing portion 1).
3, 15) so that the thread can be removed within a length range from the other end (the right end in FIGS. 1 to 3) to the fixing portion. The fixed end of the hanging thread 20 is attached to the strainer bag body 1.
0, a continuous heat seal portion 13 (fixed portion denoted by reference numeral 21) sealing the side edge portion 12 on one side (left side), and a reinforcing heat seal portion 15 (fixed portion denoted by reference numeral 22) near the continuous heat seal portion 13 (Thermal welding). In this case, if a yarn having a heat melting property is used as the suspension yarn 20, the fixed side end of the suspension yarn 20 is strongly heat-welded to the filter medium during heat sealing. Also, the other (right side) end 23 of the hanging thread 20
Is located in the intermittent portion 14a of the intermittent heat seal portion 14 and is in a non-fixed state. Then, when the non-fixed side end 23 of the hanging thread 20 sewn by the sewing machine is pulled, the seam is sequentially released, and as shown by reference numeral 20 ′ in FIG. It can be pulled out from the bag body 10.
Note that the non-fixed side end 23 of the hanging thread 20 is a thread removal side end, and in the following description, the non-fixed side end 23 may be referred to as a thread removal side end.

The thread removing side end 23 of the hanging thread 20 is covered with a knob piece 25 made of a small piece of adhesive tape.
This knob piece 25 has an adhesive applied to the back surface,
The hanging end 20 of the hanging thread 20 is adhered to the outer surface of the drawer bag main body 10 (turnback lid 17) and the thread removing side end 23. In this manner, when the knob piece 25 covers the thread removing side end 23 of the hanging thread 20 and the knob piece 25 is filtered and adhered to the bag body 10, the thread removing side end 23 of the hanging thread becomes It cannot be solved carelessly.

When the knob piece 25 is removed from the bag body 10 as shown by reference numeral 25 'in FIG.
The thread removing side end 23 'of the hanging thread 20 is adhered to the back surface of 5' and pulled out from the filter bag body 10, and the knob piece 25 '
Is further pulled as indicated by reference numeral 25 ″, so that the stitches of the hanging thread 20 are sequentially released and pulled out from the bag body 10. In addition, at each end of the sewing thread 20 that has been stitched, Due to the separation of the filter bag during the manufacturing process, short and small scrap yarns that are discontinuous with the main portion of the hanging thread remain, and the scrap yarn at the fixed end of the hanging thread 20 is removed from the continuous heat sealing portion 13.
However, the waste thread 24 (FIGS. 2 and 3) at the thread removing side end 23 of the hanging thread 20 remains in an unfixed state. By the way, the waste thread 24 at the thread removing side end 23 is adhered to a knob piece 25 as shown in FIG. 3, and when the knob piece 25 is peeled off from the filter medium as indicated by reference numeral 25 ', the waste thread 24 is removed. Is removed from the filter medium while being adhered to the knob piece 25 'as shown by reference numeral 24'. Therefore, when the hanging bag W with the hanging thread is used, the waste thread 24 does not separate and become garbage or float in the liquid.

The bag W with a hanging thread is shown in FIG.
As shown in (1), an appropriate number (for example, 50) of sheets are laminated, and the strained bag laminate X is packaged with a packaging material Y, and shipped in the state of a packaged product Z. At that time, as described above,
And the hanging thread 2 (including the knob piece 25) are integrated in a stable state, so that the laminating operation of each of the filtering bags W with hanging threads and the packaging operation of the filtering bag laminate X are automated (mechanical processing). It becomes possible. Further, when using the hanging bag W with a hanging thread, when the knob piece 25 is peeled off from the filter medium and pulled, the seam of the hanging thread 20 is sequentially released and the other end side is fixed (fixed portions 21 and 22). It can be used as a single hanging thread in the folded state. Then, similarly to the conventional example of FIG. 12, after storing tea leaves in the bag portion 11, the opening 16 is folded back and the lid 1 is closed.
7, the knob 25 is pinched to hold the filter bag body 10 containing tea leaves, and the filter bag body 10 containing tea leaves is immersed in boiling water in a container such as a teapot to discharge tea.

In the filter bag W with a hanging thread shown in FIGS. 1 to 3, the one end of the hanging thread 20 is fixed by the heat seal portions 13 and 15 of the filter material. Instead of using the heat sealing portions 13 and 15, the fixing can be performed by another means such as hot melt. In this case, after the heat-sealing of the filter medium for forming the bag portion by a conventional method, the hanging thread 20 is sewn with a sewing machine, and then one end of the hanging thread is fixed to the filter medium by means such as hot melt. do it.

FIGS. 5 and 6 show an apparatus for manufacturing the strainer bag W with a hanging thread of FIG. FIG. 7 shows a manufacturing process performed using the manufacturing apparatus shown in FIGS.

The manufacturing apparatus shown in FIG. 5 and FIG.
1 (performing the feeding operation A) for continuously feeding the band-shaped filter medium S from the sewing machine, and sewing one sewing thread (single-ring stitch) of one hanging thread 20 continuously in the length direction of the band-shaped filter medium S that has been drawn out. Sewing machine 2 (sewing operation B)
Is performed), the folded plate 3 for performing the width folding of the thread-attached band-shaped filter medium S for forming the bag portion (performing the width folding operation C), and the thread-attached band-shaped band-shaped filter medium U are successively arranged with one filter bag body 1 at an interval. Heat sealing device 4 for heat sealing (heat sealing operation D
Is carried out), the knob piece supply device 5 (performing the knob piece bonding operation E) for adhering the knob piece 25 composed of a small piece of adhesive tape to an appropriate position of the heat-sealed band-shaped filter medium V, and suspending the heat-sealed band-shaped filter medium V A cutting device 6 (performing the cutting operation F) that cuts off the hanging bag W with the hanging thread by cutting with the yarn 20 and a laminating device 7 (performing the laminating operation G) that sequentially stacks the separated hanging bag W with the hanging yarn. And

The feeding device 1 continuously feeds the band-shaped filter medium S from the filter medium roll R, and employs a belt feeding type conventionally used. Strip filter media S
A web-like material (for example, a nonwoven fabric) having heat welding property, water permeability and water resistance is used. The width of the band-shaped filter medium S differs depending on the folded shape.
Those having a size of about 70 to 230 mm are used.

The sewing machine 2 is for sewing one hanging thread 20 continuously on a belt-shaped filter medium S which is sequentially and continuously fed, and has a function of a single chain stitch or a double chain stitch. ing. In the embodiment of FIG.
Due to the fact that it is attached to the folded lid 17 part of
The sewing machine is sewn at a position close to one side edge of the band-shaped filter medium S. It is to be noted that the suspending yarn 20 is preferably a heat-fusible yarn. However, a yarn having poor heat-fusibility such as cotton can be bound by heat-melting the filter medium during heat sealing.

As the folding plate 3 for width folding, a conventional one is used. The band-shaped filter medium S is folded in two to form the bag portion 11, and the folded lid 17 is formed on the opening side.

The heat sealing device 4 heat-welds the width-folded band-shaped filter medium U with thread to each of the filtering bag main bodies 10, and employs a pair of heat rolls 41,41.
In this embodiment, on the outer peripheral surface of each of the heat rolls 41, 41,
As shown in FIG. 6, two pieces at four locations with a product length interval
A pair of linear heaters 42 and 43 are attached. The heaters 42 and 43 are attached in a state of being close to each other (for example, at an interval of about 2 to 3 mm). In the set of two heaters at each location, one (the trailing side in the illustrated example) heater uses a continuous heater 42 which is continuous over the entire width of the thread-folded band-shaped filter medium U, and the other heater ( The intermittent heater 4 in which a small area portion corresponding to the hanging thread 20 in the thread-width folded band-shaped filter medium U is removed (intermittent portion 43a) is provided on the leading side).
3 is used. The missing portion (intermittent portion 43a)
The appropriate length is, for example, about 5 to 6 mm. Further, in this embodiment, a short heater 44 is provided at a position corresponding to the hanging string 20 at a position near the trailing side of the continuous heater 42.

When the continuous heaters 42, 42, the intermittent heaters 43, 43, and the short heaters 44, 44 of the heat rolls 41, 41 meet each other, the heat sealing device 4 forms a width-folding band with thread. A continuous heat seal portion 13, an intermittent heat seal portion 14, and a reinforcing heat seal portion 15 are formed on the filter medium U. In the intermittent heat seal portion 14, a non-seal portion 14a is formed at a portion corresponding to the hanging thread 20.

The cutting device 6 includes a pair of blade rolls 61, 6
6. On the outer peripheral surface of each of the blade rolls 61 and 66, a cutting blade 6 is provided with a product length interval to be cut.
2, 67 are provided. In addition, one blade roll 61
Is provided with three cutting blades 62, and the other blade roll 6
6 is provided with two cutting blades 67, 67. The cutting blades 62 and 67 on each side are set so as to sequentially come out when the intermediate portions of the pair of heat seal portions 13 and 14 correspond, and when the two cutting blades 62 and 67 come together. Heat-sealed band-shaped filter medium V to both heat-sealed portions 1
It cuts between 3 and 14 and separates the strainer bag W with a hanging thread. On the outer peripheral surface of one of the blade rolls 61, a large number of vacuum holes 63, 63, 63 are formed at three locations in the roll axis direction and are continuous at small intervals. The vacuum holes 63, 63, 63 in each row are
The separated filter bag W with a hanging thread is smoothly transferred to the conveyor 71 side, and is sucked in an angle range indicated by reference numeral 64 in FIG. The vacuum hole 63 in the middle row is provided with the hanging thread 2 of the heat-sealed band-shaped filter medium V.
0 is formed at the corresponding position. The vacuum holes 63 in the intermediate row have a function of transferring the heat-sealed band-shaped filter medium V to an appropriate position (a position covering the non-sealed portion 14a) while adsorbing a small piece 58 from the knob piece supply device 5 described later. Have. The blade roll 61 with the vacuum hole 63 is shared by the tape cutting device 53 of the knob piece supply device 5 described later.

As shown in FIGS. 5 and 6, the knob piece supply device 5 includes a tape feeding conveyor 51 for feeding an adhesive tape 57 from a tape roll 56, and a tape cutting device for cutting the adhesive tape 57 by a predetermined small length. 53. The adhesive tape 57 has a width of about 10 mm. The tape delivery conveyor 51 has a large number of vacuum holes 51a formed at small intervals in the length direction.
Further, a vacuum box 52 is provided on the lower surface side of the delivery portion of the tape delivery conveyor 51, and the adhesive tape 5 is supplied by suction from the vacuum box 52.
7 can be conveyed while being adsorbed on the upper surface of the tape delivery conveyor 51. The adhesive tape 57 is transported on the tape delivery conveyor 51 such that the adhesive application surface is on the upper surface side. The feeding speed of the adhesive tape 57 by the tape feeding conveyor 51 is set to a low speed of about 1/5 to 1/6 of the peripheral speed of the blade roll 61 of the cutting device 6. The tape cutting device 53 includes a cutter roll 54 and a cutter roll (common roll) 6 on the cutting device 6 side.
1 and 1.

The knob piece supply device 5 functions as follows. First, the tip side of the adhesive tape 57 is fed between the two cutter rolls 54 and 61 of the tape cutting device 53 by the tape delivery conveyor 51. At this time, since the sending speed of the tape delivery conveyor 51 is lower than the peripheral speed of the shared roll 61, the outer peripheral surface of the shared roll 61 slides on the lower surface of the adhesive tape 57. And the two-edged roll 5
When the cutting blades 55 and 62 meet each other, the leading end of the adhesive tape 57 is cut by a predetermined small length (for example, 15 to 20 mm). Is transported to the running position of the heat-sealed band-shaped filter medium V while being sucked into the vacuum holes 63 in the middle row. At this time, the small piece 58 covers the non-seal portion 14a of the intermittent heat seal portion 14 of the heat-sealed band-shaped filter medium V, and the trailing end of the small piece 58 has two heats of the heat-sealed band-shaped filter medium V. Positioning is performed so that the intermediate portion (cutting position) of the seal portions 13 and 14 does not come to the continuous heat seal portion 13 side. When the small piece 58 passes between the two cutter rolls 61 and 66 of the cutting device 6, the small piece 58 is removed from the non-seal portion 14 a of the intermittent heat seal portion 14.
Is adhered to the filter medium in a state where is coated. Immediately after the small piece 58 is adhered to the filter medium, the cutting blades 62 and 67 of the two cutter rolls 61 and 66 meet and the filter bag W with a hanging thread is cut off with the small piece 58 (knob piece 25) adhered. It is.

The filter bag W with the hanging thread separated by the cutting device 6 is sent to the laminating device 7 by the feed conveyor 71. Note that the transport speed of the feed conveyor 71 is considerably higher than the peripheral speed of the blade rolls 61 and 66 of the cutting device 6.

The laminating apparatus 7 is configured to sequentially push out the filter bag W with the hanging thread transferred to the lower end portion of the feed conveyor 71 onto the table 73 by the packer device 72 in a vertical position. The filtering bag with hanging thread W extruded onto the table 73 is provided with a marking for sorting (for example, slightly lifted) every predetermined number (for example, 50), and the bag is stacked from the laminated filtering bag X 'in the vertical position. , And are conveyed to the packaging device (performing the packaging operation H) side by the predetermined amount (the amount indicated by the symbol P in FIG. 7). The laminating device 7
When the number of the bag with the hanging thread W is stacked by the number of packaging units (for example, 50), it is also possible to adopt a structure in which the laminated bag is automatically and automatically conveyed to the packaging process side. . Then, in the packaging step H, the strained bag laminate X is packaged with the packaging material Y by a conventional method, and the final packaged product Z is formed.
And

In the manufacturing apparatus and the manufacturing method of the embodiment shown in FIGS. 5 to 7, the packaged product Z of the filter bag with the hanging thread is manufactured sequentially as described above. The hanging thread 20 is stably attached to the filter medium (the folded lid 17) by sewing. Therefore, even if it is a straining bag W with a hanging thread, it can be manufactured automatically and continuously by a machine, and further, the straining bag with a suspending thread W can be manufactured in a stable state. 1
Since it is attached to 0, the subsequent laminating step G and packaging step H can be performed mechanically.

In the manufacturing method shown in FIG. 8, the order of the sewing operation B of the hanging thread 20 by the sewing machine 2 and the width folding operation C of the band-shaped filter medium S are reversed. That is, in the manufacturing method of FIG. 7, the hanging thread 20 is sewn on the band-shaped filter medium S before the width-folding, and then the band-shaped filter medium T with the thread is width-folded. In this method, after the band-shaped filter medium S fed from the filter medium roll R is width-folded, one hanging thread 20 is sewn on the width-folded band-shaped filter medium T 'continuously in the length direction. The subsequent operations (heat sealing operation D, knob piece bonding operation E, cutting operation F, laminating operation G) in FIG. 8 are the same as those in FIG.

In the method for manufacturing the filter bag with a hanging thread shown in FIG. 8, the hanging thread 20 is sewn on the band-shaped filter medium T 'that has been folded, so that the final product (the filter bag with a hanging thread W) is used. The filtering bag body 10 is spelled over three layers (two of the bag portions 11 and the folded lid 17) (the inside of the bag portion 11 is closed), but the hanging thread 20 is unraveled during use ( Since the inside of the bag 11 is opened), there is no problem.

FIGS. 9 and 10 show other embodiments of the heat sealing device 4 respectively.

In the heat sealing apparatus 4 shown in FIG. 9, two types of heaters 42A and 43A (two in total, four in total) having a slightly wide width (for example, 4 mm width) are filtered on the outer peripheral surface of the heat roll 41 (one pair). The bag bodies 10 are provided alternately at length intervals. One heater 42A is a continuous heater continuous over the entire width of the thread-folded band-shaped filter medium U, and the other heater 43A is an intermittent heater having an intermittent portion 43Aa at a position corresponding to the hanging thread 20. I have. Then, when the thread-folded band-shaped filter medium U sequentially passes through the heat sealing device 4 (between the pair of heat rolls 41), the same type of heaters of each heat roll 41 (continuous heater 42A, intermittent heater 43A). When they meet each other, the wide continuous heat seal portions 13A and the wide intermittent heat seal portions 14A are sequentially and alternately formed. In the wide intermittent heat seal portion 14A, a sealless portion 14Aa is formed at a position corresponding to the hanging thread 20.

On the other hand, in the knob piece supply device 5 (FIG. 6),
A small piece 58A twice as long as the knob piece is cut, and the small piece 5A is cut.
8A is sequentially bonded to the non-seal portion 14Aa of the wide intermittent heat seal portion 14A so as to straddle the front and rear sides of the heat seal portion 14A. In addition, the small piece 58A of this double length is used.
Is supplied only to every other heat seal portion 13A, 14A in the heat-sealed strip-shaped filter medium V and only to the wide intermittent heat seal portion 14A.

In the cutting operation F, the wide heat seal portions 13A and 14A are cut so as to be divided into two. In this case, in the wide intermittent heat seal portion 14A, the heat seal portion 14A is divided into two parts, and the small pieces 58A are also divided into two parts.
Knob pieces 25 and 25 remain in 2 and 12, respectively. Therefore, in the separated bag with a hanging thread W, a continuous heat seal portion 13 is formed on one side edge 12 and the other side edge 12 is formed, similarly to the bag with a hanging thread shown in FIG.
The intermittent heat seal portion 14 (with knob piece 25) is formed at the end.

In the heat sealing apparatus 4 shown in FIG. 10, one kind of heater 42B (four in total) having a slightly wide width (for example, 4 mm width) is filtered on the outer peripheral surfaces of the heat rolls 41 (a pair), and the length of the bag body 10 They are provided at intervals. The heater 42B is continuous over the entire width of the width-folded band-shaped filter medium U with a thread, while forming a notched heaterless part 42Ba at a portion corresponding to the hanging thread 20. The cut-out non-heater portion 42Ba has a depth of about １ ／ of the entire width of the heater 42B. When the width-folded band-shaped filter material U passes through the heat sealing device 4 (between the pair of heat rolls 41) sequentially, when the heaters 42B of the heat rolls 41 meet each other, the hanging thread 20 is moved. Wide continuous heat seal portions 13B are sequentially formed with the notched non-seal portions 13Ba at corresponding positions.

Then, in the knob piece bonding operation E, the knob pieces 25 sequentially formed by the knob piece supply device 5 are sequentially moved to the center (M) in the width direction of the wide continuous heat sealing portion 13B.
-M line) so as not to exceed
a, and then adhere to the filter medium.

Thereafter, in the cutting operation F, the wide continuous heat seal portion 13B is cut so as to be divided into two sequentially. Therefore, also in the embodiment shown in FIG. 10, a filter bag W with a hanging thread similar to that shown in FIG. 1 can be manufactured.

[0071]

According to the first aspect of the present invention, the hanging bag W with the hanging thread according to the first aspect of the present invention has the hanging thread 2
0 is attached to the bag body 10 with a sewing machine (single-ring sewing or double-ring sewing) that enables thread removal, and one end of the hanging thread 20 is further filtered and fixed to the bag body 10 by heat sealing. At the same time, the hanging thread 20 can be pulled out in a length range from the other end side to the fixing portion 22.

As described above, in the filtering bag W with a hanging thread according to the first aspect of the present invention, since the hanging thread 20 is stably attached to the filtering bag main body 10, the laminating operation of the filtering bag with the hanging thread is performed. Alternatively, there is an effect that the hanging thread 20 does not become a hindrance at the time of a packaging operation, and automatic lamination and automatic packaging can be performed by a machine, thereby improving the efficiency of the manufacturing operation.

According to the second aspect of the present invention, in the filter bag with a hanging thread according to the first aspect, the knob piece 25 made of a small piece of adhesive tape is used.
Is adhered to the thread removing side end 23 of the hanging thread 20 and the outer surface of the bag body 10.

As described above, the yarn pulling-side end 2
3 is covered with the knob piece 25, the thread removing side end 2
3 does not fall inadvertently. Also, knob piece 25
And hanging off from the bag body 10, the hanging thread 20 can be sequentially pulled out from the thread removing side end 23 side, and the thread removing operation can be easily performed. Further, in the case where the hanging thread 20 is attached by the sewing machine capable of removing the thread as described above,
The discontinuous waste thread 24 remains at the suspension thread main portion at the suspension thread end (the thread removal side end 23).
The four portions can be adhered with the knob pieces 25, and the trouble that the waste thread 24 becomes dust or floats in the liquid can be eliminated.

In each of the manufacturing methods according to the third and fourth aspects of the present invention , the hanging thread 20 is sewn on the belt-shaped filter medium S which is continuously fed and then width-folded (or strip-shaped). The hanging thread 20 is sewn after the filter medium S is width-folded, and when the width-folded band-shaped filter medium U with the thread is heat-sealed with a product interval, the heat formed on both side edges 12, 12 of the filter bag body 10 is formed. Seal parts 13, 14
One heat seal portion 13 fixes the hanging thread 20 to the filter medium, while the other heat seal portion 14
0 is set in a non-fixed state with respect to the filter medium, and the heat-sealed band-shaped filter medium V is filtered to form a heat-seal portion 13 on the hanging string fixed side at one side edge 12 of the bag body 10. The other side edge portion 12 is cut so as to form the heat-sealed portion 14 on the side where the hanging thread is not fixed, and the strainer (W) with the hanging thread is cut off.

Therefore, in each of the manufacturing methods according to the third and fourth aspects of the present invention, even in the case of a filter bag with a hanging thread, the hanging thread 20 can be automatically attached by a machine. The straining bag W with the hanging thread is a
Can be attached to the outer surface of the filter bag body 10 in a stable state, so that the subsequent laminating operation and packaging operation can be automated by a machine, and there is also an effect that the production efficiency can be improved.

According to the manufacturing method of the present invention, before cutting the heat-sealed band-shaped filter medium V, the knob piece 25 made of a small piece of the adhesive tape is removed. The hanging thread 20 is adhered to the outer surface of the filter medium in a state where the thread removing side end 23 is covered. Therefore, there is an effect that the knob piece 25 can be easily attached, and since the knob piece 25 is adhered, the knob piece 25 can be attached in a stable posture.

The manufacturing apparatus according to the sixth aspect of the present invention includes a feeding device 1 that continuously feeds the band-shaped filter medium S from the filter medium roll R, and a feed unit 1 that continuously extends in the longitudinal direction of the band-shaped filter medium S. Sewing machine 2 that performs sewing (single-ring sewing or double-ring sewing) so that the hanging thread 20 of the book can be removed freely.
A fold plate 3 for width-folding the band-shaped filter material for forming the bag portion, and a heat-sealing device for sequentially heat-sealing the width-folded band-shaped filter material U with a thread for each of the bag bodies 1. One of the heat-sealing portions 13, 14 formed on both side edge portions 12, 12 fixes the hanging string 20 to the filter medium, while the other heat-sealing portion 1.
Reference numeral 4 denotes a heat sealing device 4 in which the hanging thread 20 is not fixed to the filter medium, and heat-sealing of the heat-sealed band-shaped filter medium V to one side edge 12 of the bag body 10 on the side where the hanging thread is fixed. A heat-sealing portion 1 on the non-suspended side of the hanging string is formed on the other side edge portion 12 of the strainer bag body 10 in which a portion 13 is formed.
And a cutting device 6 that cuts the filter bag W with a hanging thread and cuts it to form the bag 4.

According to the manufacturing apparatus of the sixth aspect, even in the case of the filter bag W with the hanging thread, the hanging thread 20 can be manufactured without being in the way, so that the continuous manufacturing can be performed by a machine. is there.

According to the seventh aspect of the present invention, the manufacturing apparatus of the sixth aspect further includes a knob piece supply device 5 for bonding the knob pieces 25 to predetermined positions of the filter medium. There is an effect that the filter bag W with a hanging thread having the knob pieces of No. 2 can be continuously manufactured by a machine.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter bag with a hanging thread according to an embodiment of the present application.

FIG. 2 is a partially enlarged plan view of the strainer with a hanging thread of FIG. 1;

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a perspective view of a packaged product in which the bag with the hanging thread of FIG. 1 is packaged in a stacked state.

FIG. 5 is a schematic view of an apparatus for manufacturing a filter bag with a hanging thread according to the embodiment of the present application.

6 is a partial perspective view of the manufacturing apparatus of FIG.

FIG. 7 is a manufacturing process diagram of the strainer with a hanging thread according to the embodiment of the present application.

FIG. 8 is a manufacturing process diagram of the modified embodiment of FIG. 7;

FIG. 9 is a manufacturing process diagram of a filter bag with a hanging thread according to another embodiment of the present application.

FIG. 10 is a manufacturing process diagram of a strainer bag with a hanging thread according to still another embodiment of the present application.

FIG. 11 is a perspective view of a conventional strainer with a hanging thread.

FIG. 12 is a cross-sectional view illustrating a use state of the strainer with a hanging thread in FIG. 11;

[Explanation of symbols]

1 is a feeding device, 2 is a sewing machine, 3 is a folded plate, 4 is a heat sealing device, 5 is a knob piece feeding device, 6 is a cutting device, 7 is a laminating device, 10 is a filtering bag main body, 11 is a bag portion, 1
2 is a side edge portion, 13 is a continuous heat seal portion, 14 is an intermittent heat seal portion, 14a is a non-seal portion, 17 is a folded lid,
20 is a hanging thread, 21 and 22 are fixing portions, 23 is a thread removing side end, 24 is a waste thread, 25 is a knob piece, R is a filter medium roll, S
Is a band-shaped filter medium with a thread, T is a band-shaped filter medium with a thread, U is a band-shaped filter medium with a thread, V is a heat-sealed band-shaped filter medium, W is a filter bag with a hanging thread, X is a laminated filter bag, Y is a packaging material, and Z is a packaging material. Product.

Claims (7)

[Claims] 1. A filtering bag main body (10) capable of storing tea leaves.
A hanging bag attached with a hanging string (20), wherein the hanging string (20) is a single one.
Attach the sewing thread to a predetermined length range in the appropriate position of 0) by a sewing machine capable of pulling out the thread, and strain only one end of the hanging thread (20) to the bag body (10).
To the other end (2).
3. A filter bag with a hanging thread, wherein the thread can be removed in a length range from 3) to the fixing portion (22). 2. The method according to claim 1, wherein the knob piece (25) made of a small piece of adhesive tape is adhered to the thread removing side end (23) of the hanging thread (20) and the outer surface of the filter bag body (10). A bag with a hanging thread. 3. The method for manufacturing a filter bag with a hanging thread according to claim 1, wherein one of the hanging threads (20) is continuously wound in the length direction of the strip-shaped filter medium (S) continuously fed. Sewn, when the banded filter medium with thread (T) is width-folded to form a bag portion, and when the band-shaped banded filter medium with thread (U) is sequentially heat-sealed for each of the filtration bag bodies (10), One of the heat seal portions (13, 14) formed on both side edges (12, 12) of the filter bag body (10) uses the hanging thread (20) as a filter material. While being fixed, the other heat seal portion (14) is
0) is not fixed to the filter medium, and the heat-sealed band-shaped filter medium (V) is placed on one side edge (12) of the filter bag body (10), and the heat-seal portion (13) on the side where the hanging thread is fixed. Is formed and the strainer bag body (1
0) is cut so as to form a heat-sealing portion (14) on the other side edge portion (12) of the suspension thread non-fixing side, and the filter bag (W) with the suspension thread is cut off. Method for producing a filter bag with a hanging thread. 4. The method for producing a filter bag with a hanging thread according to claim 1, wherein the band-shaped filter material (S) continuously fed is width-folded for forming a bag portion, and the width-folded band-shaped filter material (T ′) is formed. 1) When one hanging thread (20) is continuously sewn in the length direction, and heat-sealed for each of the filtering bag bodies (10) sequentially with the width-folding band-shaped filter medium (U) with the thread. One of the heat sealing portions (13, 14) formed on both side edges (12, 12) of the filtering bag main body (10) uses the hanging thread (20) as a filter material. While the other heat seal portion (14) is attached to the hanging thread (2).
0) is not fixed to the filter medium, and the heat-sealed band-shaped filter medium (V) is placed on one side edge (12) of the filter bag body (10), and the heat-seal portion (13) on the side where the hanging thread is fixed. Is formed and the strainer bag body (1
0) is cut so as to form a heat-sealing portion (14) on the other side edge portion (12) of the suspension thread non-fixing side, and the filter bag (W) with the suspension thread is cut off. Method for producing a filter bag with a hanging thread. 5. The method for producing a filter bag with a hanging thread according to claim 3 or 4, wherein before cutting the heat-sealed band-shaped filter medium (V), a knob piece (25) composed of a small piece of an adhesive tape is cut off. A method for manufacturing a filter bag with a hanging thread, wherein the hanging thread (20) in the heat seal portion (14) on the fixed side is covered and adhered to the outer surface of the filter medium. 6. A manufacturing apparatus for manufacturing the filter bag with a hanging thread according to claim 1, wherein a feeding device (1) for continuously feeding a band-shaped filter medium (S) from a filter medium roll (R); A sewing machine (2) for sewing one hanging thread (20) continuously in the longitudinal direction of the filter medium (S), and a folding plate for width-folding the band-shaped filter medium (T or S) to form a bag portion ( 3), and a width-folding band-shaped filter medium (U) with thread is formed into a single filtering bag body (1).
A heat-sealing device for sequentially performing heat-sealing for each of the heat-sealing portions (13, 14) formed on both side edges (12, 12) of the bag body (10). 13) is a heat sealing device (4) in which the hanging thread (20) is fixed to the filter medium, while the other heat sealing portion (14) is in a state where the hanging thread (20) is not fixed to the filter medium. And the heat-sealed band-shaped filter medium (V) is passed through the filter bag body (1).
0), a heat-sealing portion (13) on the hanging thread fixing side is formed on one side edge (12), and the other side edge (12) of the filtering bag main body (10) has a hanging thread non-fixing side. A cutting device (6) for cutting the heat-sealed portion (14) so as to form the heat-sealing portion (14) and separating the straining bag (W) with the hanging thread. 7. The apparatus for manufacturing a filter bag with a hanging thread according to claim 6, wherein before the heat-sealed band-shaped filter medium (V) is cut, a knob piece (25) made of a small piece of adhesive tape is removed.
An apparatus for manufacturing a filter bag with a hanging thread, comprising: a knob piece supply device (5) for bonding a non-fixed side end (23) of a hanging thread (20) to an outer surface of a filter medium.