JP2017105491A - Bag with deaeration mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag with a deaeration mechanism, capable of removing gas with a simple structure, and preventing water and dust from the outside from entering.SOLUTION: A bag with a deaeration mechanism has a bottom by closing one edge of a belt-like member made by making a cylindrical body flat, and is formed with a storage part formed by dividing the inside thereof, and a deaeration mechanism for deaerating gas in the storage part to the outside. The bag with the deaeration mechanism is such that: the deaeration mechanism comprises a ventilation passage communicated with the storage part, and extended diagonally from the bottom side of the belt-like member to the lateral side, and a corner part communicated with the ventilation passage and formed with a communication part including corner portions of the bag and communicated with the outside; and the ventilation passage is formed from two seal parts provided by bonding facing inner surfaces of the belt-like member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bag with a deaeration mechanism that can vent air and gas in the bag. More specifically, the present invention relates to a bag with a deaeration mechanism that can extract air and generated gas from a bag containing contents such as powder and feed.

  Conventionally, a bag has been provided with a mechanism for removing gas or liquid from the bag, for example, for preventing collapse of the stacked bags. For example, a hole communicating with the outside is formed in the vicinity of the end of the bag, the inner surface of the bag is welded to the front of the hole, and a welding portion that prevents the outflow of contents is extended and the welding is performed. An unwelded part is partially formed in the part so that gas can pass therethrough.

  Patent Document 1 describes a bag in which a welded portion is provided obliquely with respect to the bottom of the bag so as to face the corner of the bag. In this device, a triangular portion surrounded by a welded portion (joint) and a side wall of the bag is provided in the vicinity of the corner of the bag, and a hole through which air or the like in the bag is extracted is formed in the small portion.

Patent Document 2 describes a bag in which a welded portion (thermal fusion portion) is extended in parallel to the bottom portion (seal portion) of the bag formed by welding. In this, a cut is formed in front of the seal portion, and a heat fusion portion is formed in which an unheat fusion portion is partially formed in front of the cut.
On the other hand, in Patent Document 3, there is a bag in which a welded portion (double seal portion) parallel to the bottom portion is provided at the opening of the bag. In the double seal portion, unwelded portions (air holes) are formed alternately.

  Patent Document 4 includes a bag in which a welded portion (fused portion) is extended in parallel to the bottom portion (bottom seal portion) of the bag, and a deaeration passage is formed between them. This forms a relatively long degassing passage in the width direction of the bag.

  Patent Document 5 discloses a fluid packaging bag with a self-closing outflow passage that closes out an outflow passage of a liquid such as mayonnaise or soy sauce. Cut the corner of this bag along the cutting line, open the tip of the outflow passage to the outside, hold the bag with your hand and press the contents in the bag, the pressurized contents in the bag will pour out. The contents are prevented from flowing out by weakening the force of gripping the bag.

In addition, there is a packaging polyethylene bag filled with animal feed using beer lees. The feed using beer lees etc. has already started fermentation before filling, and continues for about 2 to 4 weeks after filling. For this reason, the bag swells immediately after filling the feed, and the packing on the pallet becomes unstable. In order to cause collapse of the cargo when it is stacked as it is, a hole for deaeration was made in the bag. This hole was previously opened in an empty bag, was automatically opened in an automatic packaging machine, or was manually opened.
After the fermentation was over, the contents arose when moisture entered from the air vent hole, so the bags that had been fermented were manually sealed with tape or stickers one by one to close the hole. For example, in order to close the hole of the bag once stacked, the stretch film that was wound at the time of storage is peeled off once to prevent the collapse of the bag, the hole is closed, and the stretch film is wound again before shipping. Was done.

Japanese Patent Publication No.41-12470 JP 10-101098 A JP 11-29153 A JP-A-8-268441 JP 2002-193282 A

For example, as in Patent Documents 1, 2, and 3, a bag having a valve mechanism for extracting gas from the bag can easily release the gas to the outside, and the contents do not easily flow out on the bag. A plurality of small unwelded portions are formed.
However, generally, if the unwelded portion is small, deaeration cannot be performed quickly, which is a cause of delaying the content filling operation. On the other hand, if the unwelded part is large, it will cause the outflow of the contents and the entry of water and dust from the outside. Thus, the quick deaeration and the prevention of the outflow of the contents and the entry of water and garbage from the outside are contradictory.
Further, in the filling operation of the contents, in order to promote filling, the bottom portion of the bag in the middle of filling is hit with a cylinder while the bag is suspended. However, if the ventilation path is provided at the bottom, there is a possibility of hindering ventilation and hindering the filling operation.
Further, water may enter from the deaeration hole of the valve mechanism.
Moreover, if the direction of ventilation | gas_flowing, such as the gas extracted from a storage part, is extended in the width direction of a bag, for example, a large space will be needed in the width direction. In addition, since the welded portion becomes longer, it takes time to manufacture.

  Furthermore, in the polyethylene bag for packaging packed with animal feed using beer lees, etc., the process of manually making the holes in advance and closing the holes after fermentation has been troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bag with a deaeration mechanism that can quickly remove gas and the like with a simple configuration and that can prevent entry of water and garbage from the outside.

(1) A bag with a deaeration mechanism according to the present invention includes a storage portion formed by partitioning the inside of a strip-shaped member made of a synthetic resin cylinder and closing one end thereof to form a bottom portion, A bag with a deaeration mechanism provided with a deaeration mechanism for degassing the gas in the storage part to the outside, wherein the deaeration mechanism communicates with the storage part and is located from the bottom side of the band-shaped member An air passage that extends obliquely toward the direction, and a corner portion that communicates with the air passage and includes a corner portion of the bag and communicates with the outside. It is characterized in that it is formed by two seal portions provided side by side by joining the inner surfaces facing each other of the band-shaped member.
(2) In such a bag with a deaeration mechanism, an unjoined portion is formed at least at one end of the seal portion on the storage portion side of the seal portion, and the other end of the seal portion on the corner portion side is at the bottom or side portion. It is characterized by having reached.
Here, the corner portion includes a portion that connects the side portion and the bottom portion of the bag folded flat, and may be pointed or curved somewhat.
Bonding is a concept including adhesion and welding.

(3) And by forming unjoined portions at both ends of the seal portion on the storage portion side, the ventilation path communicates with the storage portion near both ends, and the center of the seal portion on the corner side It is preferable that an unjoined portion is formed in the vicinity so that the air passage communicates with a corner near the center.

(4) Further, by forming an unjoined portion at one end of the seal portion on the storage portion side, one end of the air passage is in communication with the storage portion, and on the other end of the seal portion on the corner side. It is preferable that the air passage is communicated with the corner at the other end by forming an unjoined portion.

(5) It is preferable that the communicating part is formed by penetrating at least one sheet in a cross or Y shape.

(6) Furthermore, it is preferable that the deaeration mechanism is provided at the corners at both ends of the bottom of the bag.

(7) It is preferable that a third seal portion is provided on the storage portion side or corner portion side of the ventilation path, and an unjoined portion communicating with the storage portion or corner portion is formed on the seal portion.

(8) Furthermore, it is preferable that the contents stored in the storage unit ferment in the storage unit.

(1) The bag with a deaeration mechanism of the present invention is formed by forming two seal portions extending obliquely on a flat belt-like member, and forming an air passage by these two seal portions. Yes. The air passage is closed with the inner surfaces of the upper and lower sheets substantially in contact with each other, and is opened by being elastically deformed when an internal pressure is applied from the storage portion. When the internal pressure decreases, the state returns to the contact state again and closes. For this reason, it is possible to prevent entry of water, dust, and the like from the outside.
In addition, since the seal part is formed obliquely, the bag expands when the contents are filled, and even if longitudinal and lateral forces are applied to the bag, the force that expands the ventilation path and the vicinity of the opening of the ventilation path Can be supported by the seal portion. For this reason, some movement of the contents to the air passage can be prevented.
In addition, since an oblique seal is provided at the corner of the bag, the required length of air passage is taken into the bag, taking into consideration the material and shape of the contents, as well as the required degassing conditions. It can be formed without creating a dead space. For this reason, although the deaeration mechanism is provided, the storage space can be increased.
Furthermore, since it is not necessary to forcibly form the air passage in the width direction of the bag, the bonded portion does not become long and the configuration is simple.
Further, since the air passage is provided at the corner, it is easy to deaerate while hitting the cylinder near the center of the bottom of the bag that is being filled with the bag suspended.
Furthermore, even if the cylinder is hit or a bag is hit against the floor surface to promote filling, it is possible to prevent problems such as peeling of the deaeration mechanism joint due to the weight of the contents.

(2) When such a bag with a deaeration mechanism has an unjoined part formed at least at one end of the seal part on the storage part side, and the other end of the seal part on the corner part reaches the bottom or side part (See FIG. 3a) When the bag is filled with contents, wrinkles and folds of the bag tend to be formed in the vicinity of the unbonded portion formed in the seal portion on the storage unit side, thereby unbonded portion Can prevent some leakage of contents.
That is, when the contents are filled and the bag has a three-dimensional shape, the side and bottom portions of the folded bag open to form the side and bottom surfaces of the bag. Wrinkles and folds are likely to occur in the vicinity where the formed side surface and bottom surface are connected.
As an example of the wrinkles and creases, the upper and lower sheets (17, 18) near the unjoined portion (5a) of the seal portion (5) on the storage portion side expand to each other to form a substantially flat bottom portion. It approaches one end part (5c) of the seal part on the storage part side so as to close the joint part (5b). For this reason, even if a non-joining part is enlarged and deaeration is promoted, the outflow of the contents can be prevented to some extent.

(3), (4) And by forming unjoined parts at both ends of the seal part on the storage part side, the air passage is in communication with the storage part in the vicinity of both ends. By forming an unjoined portion near the center of the seal portion, the vent path communicates with a corner near the center, or an unjoined portion is formed at one end of the seal portion on the storage portion side. Accordingly, one end of the air passage is in communication with the storage portion, and an unjoined portion is formed at the other end of the seal portion on the corner side, so that the air passage is in communication with the corner at the other end. In this case, the air passage can be formed long and impurities are less likely to be mixed into the bag from the outside.

(5) Further, when the communicating part is formed by penetrating at least one sheet in a cross or Y shape, the tongue piece formed between the crosses or the Y-shaped cut is outward when deaerated. To increase the opening of the communication portion and release the gas to the outside. Then, when the deaeration is completed, it returns to its original shape by elasticity and closes the opening of the communication portion. Thus acts as a valve.

(6) Further, when the deaeration mechanism is provided at the corners at both ends of the bottom of the bag, the contents can be prevented from flowing into the deaeration mechanism, and impurities are further mixed into the bag from the outside. Hard to do.

(7) Further, when a third seal portion is provided on the storage portion side or corner portion side of the ventilation path, and an unjoined portion leading to the storage portion or corner portion is formed on the seal portion, Since the deaeration can be performed from both the deaeration mechanisms, the pressures of both the air passages can be made substantially the same, so the deaeration efficiency is high.
In addition, despite the provision of deaeration mechanisms at both corners of the bag, the storage space is large.
Furthermore, when filling the suspended bag with the contents, it is possible to deaerate almost uniformly from the left and right air passages while striking the vicinity of the center of the bottom, so that the efficiency of the filling operation is further increased.

(8) Furthermore, when the contents stored in the storage part are fermented in the storage part, gas is generated by fermentation of the contents and the internal pressure is increased. The temperature rises. If the temperature of the contents is cooled while degassing the generated gas from the degassing mechanism, the rise in internal pressure can be suppressed and collapse of the load can be prevented. The gas can be in a vacuumed state. At this time, due to the decrease in volume, the upper and lower sheets of the air passage utilize the force of the atmospheric pressure, and more firmly adhere to block the air passage. Thereby, mixing of water, garbage, etc. from the outside can be further prevented. In addition, it can be set as a standard of the degree of fermentation according to the degree of the vacuum state.
In addition, when there is moisture inside, the inner peripheral surface of the sheet is more likely to be in close contact with each other, and mixing of moisture, dust, etc. from the outside can be further prevented.

FIG. 1 is a schematic view showing a main part of a bag with a deaeration mechanism of the present invention. FIG. 2 is a schematic view showing a method for producing a bag with a deaeration mechanism. FIG. 3a is a schematic diagram showing how the bottom portion expands when the contents are filled, FIG. 3b is a schematic diagram showing a state where the vicinity of the non-joined portion of FIG. 3a is viewed from the inside of the bag, and FIG. It is the schematic which shows the space inside the bag formed near the edge part of the ventilation path formed. FIG. 4 is a schematic view showing how to use the bag of the present invention. FIG. 5 is a schematic view showing a main part of another embodiment of the bag with a deaeration mechanism of the present invention. 6a, 6b, 6c, and 6d are schematic views showing a main part of still another embodiment of the bag with a deaeration mechanism of the present invention. 7a and 7b are schematic views showing the main part of still another embodiment of the bag with a deaeration mechanism of the present invention. 8a and 8b are schematic views showing the main part of another embodiment of the bag with a deaeration mechanism of the present invention.

(First embodiment)
“1. Outline”
First, the outline of the bag with a deaeration mechanism of the present invention will be described with reference to FIG. The bag 10 is formed from a cylindrical body formed by, for example, inflation processing. The cylindrical body is folded flat to form a band-shaped member 11. The band-shaped member is cut to a predetermined length, and a portion to be the bottom 12 at the rear end is closed by heat sealing. The inside of the closed bag is a storage portion 13 for storing the contents 19, and the front end is an opening portion 14 for inserting the contents 19. A deaeration mechanism 1 for degassing the gas in the storage unit 13 to the outside is provided near the corner 15 at the bottom of the bag.
Note that the side folded portions of the belt-shaped member 11 are the side portions 16 and 16, and of the two sheets that are folded and overlapped, the upper sheet in the drawing is the upper sheet 17, and the lower sheet The thing is the lower sheet 18.

As shown in FIG. 1, the deaeration mechanism 1 communicates with the storage portion 13, and has an air passage 2 extending obliquely from the bottom portion 12 of the bag 10 toward the side portion 16, and the air passage 2. And a corner portion 4 including a corner portion 15 of the bag and having a communication portion 3 communicating with the outside.
In this embodiment, deaeration mechanisms 1 are provided at both ends of the bottom.

The air passage 2 is formed by two linear seal portions 5 and 6 provided by adhering the inner surfaces facing each other of the band-shaped member 11. Of the two seal portions, the first seal portion 5 is formed on the storage portion 13 side, and the second seal portion 6 is on the corner portion 4 side. In the present embodiment, the first seal portion 5 and the second seal portion 6 are provided in parallel, and the angle α with respect to the direction in which the heat seal of the bottom portion 12 extends is 45 degrees.
Note that unwelded portions 5 a and 5 b are provided at both ends of the first seal portion 5. The outer unsealed portion 5a is provided on the side portion 16 side, and the inner unsealed portion 5b is provided on the bottom portion 12 side. Further, an unwelded portion (medium unsealed portion) 6 a is provided near the center of the second seal portion 6. In the present embodiment, the lengths of the unwelded portions 5a, 5b, and 6a are the same, but may be different.

For example, the angle α formed by the first seal portion 6 and the bottom portion is, for example, 40 to 60 °, and preferably about 45 °.
The width L of such a ventilation path 2 is 10-40 mm, for example, Preferably it is 20-30 mm. Moreover, the length is 10-40 mm, for example, Preferably it is -30 mm.
Furthermore, the thickness of the said seal parts 5 and 6 is 3-5 mm, for example, Preferably it is about 3 mm. The space | interval of the seal | stickers 5 and 6 is 20-30 mm, and about 30 mm is preferable.
The length of the unwelded portions 5a, 5b, and 6a is, for example, 10 to 40 mm, and preferably 20 to 30 mm.

The corner 4 has a triangular shape, and a communication portion 3 is formed near the center thereof. The communicating portion 3 is a Y-shaped cut that penetrates the upper and lower sheets 17 and 18 (see FIG. 2). The triangular-shaped part which has the flexibility between each cut of the Y-shaped cut | notch is the tongue piece 3a, and three are formed in total. The piece 3a opens when the internal pressure in the bag is high, and exhibits a valve action that returns elastically when the pressure drops. It is preferable that each cut of the Y-shaped notch is made at 120 ° intervals.
The cut may be formed in either the upper or lower sheet. Furthermore, a cross-shaped cut may be used. Further, such a Y-shaped or cross-shaped cut may be formed at a position away from the air passage 6a, or may be opened on a line connecting the air passage 6a and the corner near the corner of the bag. Note that a hole may be simply formed as the communication portion 3.

The material of the sheet is made of various synthetic resins such as polyethylene (LDPE, HDPE) or polypropylene (OPP, CPP), and polyethylene is particularly preferable. The thickness is, for example, 0.1 to 0.23 mm, preferably 0.12 to 0.2 m.
m. Furthermore, for example, Young's modulus of ^{MD1000 / TD1500~MD3500 / TD4000kg / cm 2} .

“2. Contents”
If the content 19 packaged in the bag 10 of the present invention is a powder, it is, for example, a resin pellet, a chemical fertilizer, a chemical product, a food, a pet food, a grain, a cement, or the like. Furthermore, if it contains an elongate member and a fibrous member, they are a soil, a fertilizer, a fermented feed, a foodstuff etc., for example. In addition, an amorphous member may be included, or a mixture of an irregular member and an irregular member may be used.

Next, an example of the shape change near the corner 4 of the bag filled with the contents will be described with reference to FIG.
As shown in FIG. 3a, when the bag 19 is filled with the contents 19 (see FIG. 2), the sheets 17 and 18 are expanded in the direction of arrow B to generate a fold line 33, and the fold line is substantially centered. Folded to form a substantially flat bottom. At this time, the upper and lower sheets 17 and 18 in the vicinity of the non-joining portion 5 b on the bottom side approach the one end portion 5 c of the seal portion 5. The starting point of the folding line 33 is the vicinity of the contact 33a (starting point) between the welded portion 6 and the bottom of the second seal portion.
As shown in FIG. 3b, the opening 34 formed in the bag near the non-joint portion 5b accompanying the formation of the bottom has an elongated shape in the lateral direction (in the direction of arrow B in the figure) and closes or substantially closes. For this reason, the contents are difficult to flow near the opening 34 or are in a closed state. Accordingly, it is possible to improve deaeration and to prevent the outflow of contents.
In FIG. 3c, a rectangular pyramid-shaped space 35 having a long rhombus (opening 34) as a base and a vertex near the start point 33a is formed in the vicinity of the non-joint portion 5b of the air passage 2. Note that the apex may have a shape such as a smooth spherical surface in addition to a somewhat sharp shape. Furthermore, the position of the starting point 33a may be formed at a non-joined portion.
When the space 35 is filled with the contents, the pressure of the contents (including powder pressure and the like) can be received by the inner surfaces of the upper and lower sheets 17 and 18 forming the space. For this reason, it is difficult to generate a force (a force including a powder pressure) enough to pry open the air passage 2.

  Thus, when the bag 10 is filled with the contents, wrinkles and folds of the bag tend to be formed in the vicinity of the non-joined portions 5a and 5b formed in the seal portion 5 on the storage portion side. The outflow of the contents 19 from the non-joining portions 5a and 5b can be somewhat prevented. That is, when the contents are filled and the bag has a three-dimensional shape, the side 16 and the bottom 12 of the folded bag open to form the side and bottom of the bag. Wrinkles and folds are likely to occur in the vicinity where the formed side surface and bottom surface are connected.

"3. Usage"
Next, an example of a method of using the bag 10 with a deaeration mechanism will be described with reference to FIG.
(S1): The bag 10 with the deaeration mechanism is suspended so that the opening 14 faces upward, and the contents 19 are put into the opening from above.
(S2): Next, during the filling of the contents, the cylinder 36 is further filled while hitting the vicinity of the center of the bottom of the bag at a predetermined timing. While degassing from the air passage 2 while striking with the cylinder, the efficiency of the filling operation is high.

(S3): When filling is completed, the opening 14 is closed by heat sealing or the like. Then, for example, the bag 10 with the deaeration mechanism in which the contents are stored is placed so that the wide surface faces downward. In this state, the corner 4 is oriented in the horizontal direction. Further, since the contents 19 are received by the first seal portion 5, the close contact state is maintained. For this reason, the contents 19 are unlikely to enter the ventilation path 2 through the unwelded portions 5a and 5b. At this time, the inner surfaces of the upper and lower sheets 17 and 18 are in close contact with each other, and the air passage 2 and the corner 4 remain closed.

(S4): Next, when the internal pressure increases, the air goes around the first seal portion 5 toward the unwelded portions 5a and 5b at both ends thereof and enters the inside while expanding the air passage 2 ( (See arrow A). And it enters into the corner part 4 from the unsealed part 6a of the second seal part 6, and is discharged to the outside from the Y-shaped notch 3 formed in the corner part 4.
Alternatively, for example, the bag is pressed from above so that air is expelled toward the hole at the corner 4 of the bag by a human hand. At this time, the content 19 is moved together with the air inside by the pressing, but the content 19 is received by the first seal portion 5.

(S5): Finally, when the internal pressure decreases, the expanded air passage 2 returns to the original state by the elasticity of the upper and lower sheets 6 and 7, and the close contact state is maintained again.
For example, if the content is fermented feed, gas will continue to be released during fermentation for a certain period of time (2-4 weeks), not only during filling, but will continue outside the bag through the vent 2 Gas is discharged. During this discharge, the Y-shaped notch 3 acts as a valve. That is, when the internal pressure is applied, the piece 3a between the cuts is slightly opened, and when the pressure is removed, the piece 3a is closed elastically. For this reason, it is possible to prevent dust and other germs from entering the bag.

"4. Manufacturing method"
Returning to FIG. 2, an example of a manufacturing method of the bag 10 with the deaeration mechanism will be described. The manufacturing method 20 includes an inflation process 22 in which compressed air is blown into a tube extruded by an extruder and expanded to form a long and thin cylindrical body 21, and the obtained cylindrical body 21 is folded flatly to determine a bag in advance. A hole 3 together with a printing step 23 for printing a specific design by a printing machine at a given position and a labyrinth sealing step 24a for forming the first seal portion 5 and the second seal portion 6 at the corner portions of the bag 10. A punching step 24b for opening a hole, a cutting step 25 for cutting the cylindrical body 21 to a specified length, and a bottom sealing step for inserting a portion to be the bottom of the cut bag into a bottom sealer and then heat-sealing it to close it. 26.
These maze sealing process 24a, punching process 24b, cutting process 25 and bottom sealing process 26 are performed by a bag making machine.

The raw fabric (cylindrical body) 11 that has been flattened by the inflation process 22 and the cylindrical body 11 that has been subjected to the printing step 23 are wound around a roll (not shown).
For example, the maze sealing step 24a is performed by preparing a pair of left and right hot plates (not shown) previously processed into the shapes of the first seal portion 5 and the second seal portion 6 and intermittently moving the original fabric. While the original fabric is stopped, the hot plate is lowered to press against the original fabric and sealed. The seal position may be determined based on the position of the mark or printed pattern printed in the printing step 23. By changing the shape of the hot plate, a three-stage seal portion or a corrugated seal portion may be formed.
The maze sealing step 24a and the hole making step 24b may be performed separately.

“4. Examples”
There are two types of bags used, and the lengths of the non-joined portions 5a and 5b of the first seal portion 5 and the unjoined portions 6a of the second seal portion 6 are changed. That is, there are two types in which the lengths of the non-joining portions 5a, 5b, and 6a are 30 mm and 20 mm.
Since the other parts are common, the common parts are explained together and the individual explanations are omitted. The used bag has a length of 800 mm, a width of 550 mm, and a thickness of 0.12 mm. The material is polyethylene. The angle α formed by the first seal portion 5 and the second seal portion 6 is about 45 °. The distance between the first seal part 5 and the second seal part 6 is 30 mm. The width of each seal part 5 and 6 is about 5 mm. One side of the Y-shaped cut is 3 mm.
The feed was put into this bag 10 with a deaeration mechanism, the air was evacuated, it was arranged in 5 rows vertically and horizontally to form 1 row, loaded in 10 rows, and left in the field for 2 to 4 weeks. Over time, gas is generated from the feed by fermentation. The gas was discharged from the deaeration mechanism 1 to the outside, the bag was prevented from expanding due to the gas, and no load collapse occurred. Moreover, generation | occurrence | production of the mold | fungi in the corner part 4 by water and an impurity entering from the outside via the deaeration mechanism 1 was not seen.
Furthermore, by winding the periphery of the load loaded with the bags in 5 × 10 stages with a stretch film, the corner 4 is fixed in a bent or curved state, and further prevents contamination of foreign matter and germs from the outside. It was confirmed that the effect was enhanced.

“5. Other Embodiments”
(Second Embodiment)
Next, 2nd Embodiment of the bag with a deaeration mechanism of this invention is described using FIG. Since the bag 30 is substantially the same as the bag 10 shown in FIG. 1, the same portions are denoted by the same reference numerals and description thereof is omitted.
In this bag 27 with a deaeration mechanism, unwelded portions are formed alternately. As shown in FIG. 5, only the inner unsealed portion 5b on the bottom portion 12 side is formed, and the outer unsealed portion 5a on the side portion 16 side is not formed. The first seal portion 5 is extended at that portion.
Further, the unwelded portion 6a of the second seal portion 7 is provided on the side opposite to the inner unsealed portion 5b. Thereby, the alternate ventilation path 2 is formed.
Although not shown, the unwelded portion 6a may be provided in the middle.

(Third embodiment)
Next, 3rd Embodiment of the bag with a deaeration mechanism of this invention is described using FIG. 6a, FIG. 6b, FIG. 6c, and FIG. 6d. In these embodiments, another air passage 2 a communicating with the air passage 2 is formed. Further, since these bags are substantially the same as the bags 10 and 27 described above, the same portions are denoted by the same reference numerals and the description thereof is omitted.
In the bag 28a shown in FIG. 6a, a third seal portion 29 is provided in parallel to the air passage 2 of the bag 10 with a space on the corner 4 side. Unwelded portions 29 a and 29 a are formed at both ends of the third seal portion 29.
On the other hand, in the bag 28b shown in FIG. 6b, a third seal portion 29 is provided on the storage portion side of the ventilation path 2. An unwelded portion 29 a is formed in the middle of the third seal portion 29.
Further, in the bag 30a of FIG. 6C, a third seal portion 29 is provided on the storage portion side of the air passage 2 with respect to the air passage 2 of the bag 27 with the deaeration mechanism. An unsealed portion 29 a is formed on the side of the third seal portion 29.
On the other hand, in the bag 30b shown in FIG. 6d, the third seal portion 29 is provided on the corner side of the air passage 2. An unwelded portion 29 a is formed on the bottom side of the third seal portion 29.

Furthermore, 3rd Embodiment of the bag with a deaeration mechanism of this invention is described using FIG. 7a, FIG. 7b. In these embodiments, the second air passage 2a is not formed, and the movement of the contents is obstructed.
In the bag 31 shown in FIG. 7 a, a third seal portion 29 in which one or more unwelded portions 29 are formed is formed on the storage portion side of the air passage 2 of the bag 10.
Moreover, the bag 32 of FIG. 7b is formed with a third seal portion 29 in which one or more unwelded portions 29a are formed on the storage portion side of the air passage 2 of the bag 20.
7a and 7b, the third seal portion 29 may be provided on the corner 4 side of the air passage 2.

(Modification)
The first seal portion 6 may have a straight shape, or may have a shape that is curved or bent so that the contents 19 do not accumulate in the bag (see FIGS. 8a and 8b).
The second seal portion 7 is preferably arranged in parallel with the first seal portion 6 and has substantially the same shape. However, it may have a different shape.
Although not shown, the third seal portion 29 may be provided in front of the air passage 2 and on the corner portion 4 side, and four or more seal portions may be provided as a whole.
The number of these seal portions, the width and length of the air passage 2, the width of the unwelded portion, the number of unwelded portions 31a of the third seal portion 31, and the number and size of the communicating portions 3 are the amount of deaeration. Or it can change according to the quantity of the gas generated by fermentation etc.
In this embodiment, the seal portion is formed by heat conduction and heat welding from a heat source outside the bag. However, high frequency welding using a high frequency dielectric heating method or ultrasonic vibration is applied. It may be transmitted to a heated object and ultrasonically welded. Furthermore, you may adhere | attach using an adhesive agent.

DESCRIPTION OF SYMBOLS 1 Deaeration mechanism 2 Ventilation path 2a 2nd ventilation path 3 Communication part (Y-shaped cut)
4 Corner 5 Welding part (first seal part)
5a Unwelded part (outer unsealed part)
5b Unwelded part (side unsealed part)
5c One end part 6 Welding part (second seal part)
6a Unwelded part (Medium unsealed part)
10 Bag with Deaeration Mechanism (First Embodiment)
DESCRIPTION OF SYMBOLS 11 Band-shaped member 12 Bottom part 13 Storage part 14 Opening part 15 Corner part 16 Side part 17 Upper sheet 18 Lower sheet 19 Contents 20 Manufacturing method 21 Cylindrical body 22 Inflation process 23 Printing process 24a Maze sealing process 24b Drilling process 25 Cutting process 26 Bottom seal process 27 Bag with deaeration mechanism (second embodiment)
28a Bag with Deaeration Mechanism (Third Embodiment)
28b Bag with deaeration mechanism (third embodiment)
29 3rd seal | sticker part 29a Unwelded part 30a Bag with a deaeration mechanism (3rd Embodiment)
30b Bag with deaeration mechanism (third embodiment)
31 Bag with Deaeration Mechanism (Third Embodiment)
32 Bag with Deaeration Mechanism (Third Embodiment)
33 Folding line 33a Start point 34 Opening 35 Space 36 Cylinder α Angle L Width of air passage

Claims (8)

One end of a strip-shaped member made of a synthetic resin cylinder is flattened to form a bottom part, and a storage part formed by partitioning the inside thereof, and a degassing part for degassing the gas in the storage part to the outside A bag with a deaeration mechanism provided with an air mechanism,
The deaeration mechanism communicates with the storage portion and includes an air passage extending obliquely from the bottom to the side of the belt-shaped member, and communicates with the air passage and includes a corner portion of the bag. And a corner formed with a communication portion communicating with the outside,
A bag with a deaeration mechanism, wherein the air passage is formed by two seal portions provided side by side by joining the inner surfaces facing each other of the belt-shaped member.   The deaeration mechanism according to claim 1, wherein an unjoined portion is formed at least at one end of the seal portion on the storage portion side of the seal portion, and the other end of the seal portion on the corner portion reaches the bottom portion or the side portion. bag. By forming unjoined portions at both ends of the seal portion on the storage portion side, the air passage is in communication with the storage portion near both ends,
The bag with a deaeration mechanism according to claim 1 or 2, wherein an unjoined portion is formed in the vicinity of the center of the seal portion on the corner side, so that the ventilation path communicates with the corner near the center. By forming an unjoined portion at one end of the seal portion on the storage portion side, one end of the air passage is in communication with the storage portion,
The bag with a deaeration mechanism according to claim 1 or 2, wherein an unjoined portion is formed at the other end of the seal portion on the corner portion side, whereby the vent path communicates with the corner portion at the other end.   The bag with a deaeration mechanism according to any one of claims 1, 2, 3 and 4, wherein the communication part penetrates at least one sheet in a cross or Y shape.   The bag with a deaeration mechanism according to claim 1, wherein the deaeration mechanism is provided at corners at both ends of the bottom of the bag. A third seal portion is provided on the storage portion side or corner side of the air passage,
The bag with a deaeration mechanism according to any one of claims 1, 2, 3, 4, 5, and 6, wherein an unjoined portion that leads to the storage portion or the corner portion is formed in the seal portion.   The bag with a deaeration mechanism according to any one of claims 1, 2, 3, 4, 5, 6 and 7, wherein the contents stored in the storage part are fermented in the storage part.

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