JP2012136232A - Storage bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive storage bag with a simple structure, having a check valve effect of a gas-discharging function and an outside air inflow-blocking function.SOLUTION: A bag-forming base material 3 is made by laminating sheets or films each having at least one surface with thermal adhesiveness. Side end edges 6a, 6b of the bag-forming base material 3 are lapped on each other, and the lapped parts other than parts to be non-sealed parts 5 are mutually heat-sealed to form a cylindrical body 6. Bottom ends of the cylindrical body 6 are mutually heat-sealed to form a bottomed tubular storage bag 1, and the parts of the side end edges as the non-sealed parts 5 form a ventilation path 8 through which the inside of the cylindrical body 6 communicates with the outside. On the section where the ventilation path 8 is located, a sheet-like filter piece 9 at least having a ventilation characteristic is adhered from the inside of the cylindrical body 6. Thus, gas generated inside the cylindrical body 6 is discharged outside through the sheet-like filter piece 9 and the ventilation path 8.

Description

  The present invention relates to a storage bag suitable for storing a storage product that generates gas, such as coffee beans, and has a degassing function for releasing the gas generated from the storage product to the outside.

  2. Description of the Related Art Conventionally, there is a bag disclosed in Patent Document 1 as a storage bag that stores a storage product that generates gas such as coffee beans. That is, in Patent Document 1, one or a plurality of small holes are provided in a bag body formed of a non-breathable and moisture-resistant laminate film, and the small hole is located from the inside of the bag body. A bag for coffee beans or the like in which a nonwoven fabric-coated tape is continuously provided in the longitudinal direction of the bag is disclosed.

  With this configuration, when coffee beans or the like are stored in the bag, even if carbon dioxide gas is generated from the coffee beans or the like, the carbon dioxide gas can be released through the small holes. By doing so, it is possible to avoid the bag from being broken by the pressure of carbon dioxide gas (so-called bag breaking avoidance).

Utility Model Registration No. 3074985

  However, in the bag of Patent Document 1 described above, the nonwoven fabric-covered tape is exposed at the small holes, and there is a problem that the air permeability is too good to maintain the airtightness. As a result, the taste and aroma of coffee beans are released to the outside, while air flows from the outside through small holes, and the coffee beans are oxidized by oxygen in the air, resulting in a decrease in freshness and loss of commercial value. There are things to do. Further, depending on how the bag is placed, the small holes may be blocked and the function of releasing carbon dioxide gas may be hindered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a storage bag having a gas venting function that allows the outside air to hardly flow in, while allowing the release of gas to such an extent that the bag can be prevented from being broken.

  The storage bag according to the invention of claim 1 is such that the side edge portions of the bag-forming base material in which sheets or films having heat-welding properties are laminated on at least one surface are in a polymerized state, and the superposed portion is used as a non-seal portion. A part of the cylindrical body is heat-sealed by heat-sealing except for a part, and the end edges of the cylindrical body are heat-sealed to form a bottomed cylindrical storage bag, as a side end as a non-sealed part Part of the edges serves as an air passage that communicates the inside and outside of the tubular body, and at least the air-permeable sheet-like filter piece is adhered from the inside of the tubular body to the location where the air passage is located. Thus, the gas generated inside is discharged from the air passage to the outside through the sheet-like filter piece.

  When a container that generates carbon dioxide gas such as coffee beans is stored and sealed in such a storage bag, the internal pressure of the storage bag is increased by the carbon dioxide gas generated from the coffee beans or the like, and the closed air passage Becomes an open state. Therefore, the carbon dioxide gas in the storage bag is discharged from the ventilation path to the outside through the sheet-like filter piece. Thereafter, when carbon dioxide gas is released and the internal pressure and the external pressure of the storage bag are balanced, the air passage is closed and the discharge of the gas inside the storage bag is stopped.

  As a result, when the pressure (gas pressure) of the gas generated from the contents in the storage bag increases to such an extent that the ventilation path opens, the gas can be discharged. It can be avoided. Further, if the gas pressure does not increase to such an extent that the air passage opens, the airtightness in the storage bag can be ensured, so that it is possible to suppress the release of the taste and scent of the stored item. And since it can suppress that external air flows in in a storage bag, generation | occurrence | production of the situation where coffee beans are oxidized with the oxygen in air, freshness falls, and a commercial value is lost can be avoided.

  The storage bag according to the invention described in claim 2 is the storage bag according to the invention of claim 1, wherein the pressing body as a tool for heat sealing is formed with a recess for forming a non-seal part on the lower surface. The non-seal part is formed in the part of the superposition part facing the concave part for non-seal part formation by heat-sealing while making the bottom surface of the surface contact the superposition part of the side edge parts and pressing it. .

  In such a bag, the bag forming base material is formed with a non-sealing part forming recess on the lower surface of the pressing body that heat seals the side edge portions of the bag forming base material in a polymerized state in the bag making process. A non-sealed portion that forms a sealing portion and a ventilation path can be simultaneously formed in the overlapping portion between the side end edge portions, and the bag-making efficiency can be ensured satisfactorily.

  The storage bag according to the invention described in claim 3 is the storage bag according to the invention of claim 1, wherein the storage bag extends in the width direction of the cylindrical body on the lower surface of the first pressing body as a tool for heat sealing. A directional groove is formed, and a longitudinal groove extending in the longitudinal direction of the cylindrical body is formed on the lower surface of the second pressing body as a tool for heat sealing, and the lower surfaces of the first pressing body and the second pressing body are formed. The non-sealing part is formed in the part of the overlapping part facing the intersecting part of the horizontal groove and the vertical groove by heat-sealing while pressing in contact with the overlapping parts of the side edge parts sequentially. And

  In such a bag, in the bag making process, even when the bag forming base material is displaced in the width direction from the conveyance flow path, the first pressing body and the second pressing body cooperate to perform non-sealing in the overlapping portion. Since the formation of the portion can be ensured satisfactorily, the air passage can be firmly formed in the overlapping portion.

  The storage bag according to the invention described in claim 4 is the storage bag according to any one of claims 1 to 3, wherein the sheet-like filter piece is based on a polymerization width between side edge portions of the bag forming substrate. Also, it is formed in a strip shape that is wide and extends in the longitudinal direction of the cylindrical body, and a sheet-like filter piece is arranged inside the cylindrical body, and the side edges of the bag forming base material are heat-sealed at the same time as the sheet A portion other than the portion facing the non-sealed portion of the filter piece is heat sealed to the cylindrical body.

  In this bag making process, the side edge portions of the bag forming base material are heat sealed in the bag making process, and at the same time, the portion other than the portion facing the non-sealed portion of the sheet-like filter piece is heat sealed to the cylindrical body. Therefore, the sheet-like filter pieces can be securely disposed while ensuring good bag-making efficiency.

  The present invention has the following effects. That is, according to the present invention, it is possible to provide an inexpensive accommodation bag having a check valve effect of a gas release function and an outside air inflow prevention function. That is, in the present invention, the effect of avoiding bag breakage due to the increased gas pressure, the effect of suppressing the release of taste and fragrance of the contents, and the effect of suppressing the inflow of outside air into the storage bag (antioxidation effect) are caused. .

The partially cutaway perspective explanatory view of the accommodation bag concerning the present invention. FIG. 2 is a cross-sectional perspective explanatory view taken along the line II of FIG. Explanatory drawing of a non-seal part. A partial perspective explanatory view of a bag making machine. Molding explanatory drawing of a non-seal part. Bag making process block diagram. The side view (a) of the press body main piece of the 1st press body in 1st other embodiment, the end surface explanatory drawing (b) of a press body main piece, and heat seal explanatory drawing (c). The side view (a) of the press body piece of a 2nd press body, the end surface explanatory drawing (b) of a press body main piece, and heat seal explanatory drawing (c). The side view (a) of the press body main piece of the press body in 2nd other embodiment, the end surface explanatory drawing (b) of a press body main piece, and heat seal explanatory drawing (c).

  Embodiments according to the present invention will be described below with reference to the drawings.

  1 shown in FIG. 1 is a storage bag according to the present invention. In this embodiment, the storage bag 1 is formed as an envelope-attached bag with gussets (folds) and generates gas such as freshly roasted coffee beans. Even when the contents are accommodated, the bag has a degassing function for releasing the generated gas to the outside. The storage bag 1 is formed of a band-shaped bag-forming base material 3 formed by laminating a heat-welding film 3b on the inner surface of the bag-forming base body 3a as shown in FIGS.

  That is, when manufacturing the storage bag 1, first, the side edge portions 6 a and 6 b of the bag forming base material 3 are polymerized, and the superposed portion is heat-sealed except for a part as the non-sealed portion 5. By forming the seal portion 10, the back pasting portion (overlapping portion) 4 is formed to form a cylindrical tubular body 6. And the gusset parts 2 and 2 are folded and formed in the right-and-left both side edge part of the cylindrical body 6, and the bottom edge 7 is accommodated by heat-sealing the terminal edge parts of the cylindrical body 6 and forming the bottom part 7 It is called a bag 1.

  A part of the side edge portions 6 a and 6 b as the non-seal portion 5 forms an air passage 8 that communicates the inside and the outside of the cylindrical body 6. At the location where the air passage 8 is located, a sheet-like filter piece 9 having at least air permeability is adhered from the inside of the cylindrical body 6, and gas (carbon dioxide or the like) generated from the contained matter inside the containing bag 1. The air is discharged from the air passage 8 through the sheet filter piece 9 to the outside. a is the gas discharge direction.

  Here, the bag-forming base body 3a is a film obtained by laminating a non-breathable / moisture-resistant synthetic resin film or the like, and an aluminum vapor-deposited film having gloss, light shielding properties and barrier properties on a paper material sheet Is a laminated film. The paper material sheet is used as the outer surface side of the storage bag 1 and the aluminum vapor deposition film is used as the inner surface side of the storage bag 1. Moreover, as the heat-welding film 3b, linear low density polyethylene (LLDPE) having a melting point of 117 to 127 ° C. is used. The heat-weldable film 3b may be a sheet as long as it has heat-weldability. As the sheet-like filter piece 9, a non-woven fabric having air permeability, moisture permeability and bacteria barrier properties is formed in a tape shape and used.

  In FIG. 3, W1 is the lateral width (overlapping width) of the back pasting part (overlapping part) 4, W2 is the diameter of the non-seal part 5 formed in a circle, and W3 is formed in a tape shape (narrow band shape). It is the left-right width of the sheet-like filter piece 9 made. Each width is set so as to satisfy the relationship of the left and right width (overlapping width) W1 of the back pasting portion (overlapping portion) 4 <the diameter W2 of the non-sealed portion 5 <the left and right width W3 of the sheet-like filter piece 9. An air passage 8 is secured. By maintaining such a relationship, in the front view of the containing bag 1, the non-seal portion 5 is formed on the back pasting portion (overlapping portion) 4 and forms a part of the non-seal portion 5. The left and right side portions (arc-shaped portions) of the filter piece 9 are positioned so as to protrude outward from the left and right sides of the back pasting portion (overlapping portion) 4, and the remaining portion of the sheet-like filter piece 9 that forms other than the non-sealed portion 5 is A part of the seal portion 10 is formed by heat sealing.

  When the accommodation bag 1 configured as described above contains a container that generates carbon dioxide gas such as coffee beans and sealed, the internal pressure of the storage bag is increased by the carbon dioxide gas generated from the coffee beans, The closed air passage 8 is in an open state. Therefore, the carbon dioxide gas in the storage bag 1 is discharged to the outside from the ventilation path 8 through the sheet-like filter piece 9 (permeated). Thereafter, when carbon dioxide gas is released and the inner pressure and the outer pressure of the storage bag 1 are balanced, the air passage 8 is closed, and the discharge of the gas inside the storage bag 1 is stopped.

  As a result, when the pressure (gas pressure) of the gas generated from the contents in the storage bag 1 increases to such an extent that the ventilation path 8 is opened, the gas can be discharged, so that the breakage due to the increased gas pressure occurs. A bag can be avoided. Moreover, since the airtightness in the accommodation bag 1 can be ensured if the gas pressure does not increase to such an extent that the ventilation path 8 is opened, it is possible to suppress the release of the taste and fragrance of the contents. . And since it can suppress that external air flows in into the storage bag 1, generation | occurrence | production of the malfunction that coffee beans are oxidized with the oxygen in air, freshness falls, and a commercial value is lost can be avoided. .

  Moreover, the storage bag 1 configured as described above is continuously and automatically manufactured by folding the bag forming base material 3 with a bag making machine 20 having a bag making process to be described later. And the bag making machine 20 is provided with the press body 40 as a tool to heat seal, as shown in FIG.4 and FIG.5. The pressing body 40 is slightly longer than the longitudinal width of the containing bag 1, and includes a pressing body main piece 41 formed in a rectangular bar shape slightly wider than the left and right width W 3 of the sheet-like filter piece 9, and the pressing body main piece 41. Is also formed of a wide and vertically long rectangular plate-like support piece 42. On the lower surface of the pressing body piece 41, two non-seal portion forming recesses 43 are formed at regular intervals, and the non-seal portion forming recesses 43 are formed in a circular cylindrical recess shape in a bottom view. Yes. Note that the number and shape of the non-sealed portion forming recesses 43 are not limited to those of the present embodiment. That is, the number may be an appropriate number of one or more, and the shape may be an ellipse, a quadrangle, or more polygons extending in the left-right width direction when viewed from the bottom.

  Then, the lower surface of the pressing body piece 41 is used as a flat pressing surface 41a, and the flat pressing surface 41a is brought into surface contact at a position where the side edge portions 6a and 6b are overlapped to form the back pasting portion (overlapping portion) 4. Then, by performing heat sealing while pressing, the back pasting portion (overlapping portion) 4 which is the seal portion 10 is formed, and the position of the back pasting portion (overlapping portion) 4 facing the non-sealing portion forming recess 43 The non-seal portion 5 is partially formed on the surface.

  The sheet-like filter piece 9 has a width W3 that is wider than the overlapping width W1 between the side edge portions 6a and 6b of the bag-forming base material 3, and is formed in a strip shape that extends in the longitudinal direction of the cylindrical body 6. In the inside of the cylindrical body 6, it is arranged in the back pasting portion (overlapping portion) 4 so as to match the overlapping state. By doing so, the side edge portions 6a and 6b of the bag forming substrate 3 are heat-sealed to form the back pasting portion (polymerization portion) 4, and at the same time, the non-sealing portion 5 of the sheet-like filter piece 9 and A portion other than the facing portion (residual portion) is heat sealed to the back pasting portion (overlapping portion) 4.

  The container bag 1 configured as described above has a non-sealed portion forming recess on the lower surface of the pressing body 40 that heat seals the side edge portions 6a and 6b of the bag forming base material 3 in a superposed state in the bag making process. 43, the side edge portions 6a and 6b of the bag forming base material 3 are heat-sealed to form the back pasting portion (polymerization portion) 4 as the seal portion 10 and at the same time the back pasting portion (polymerization). The non-seal part 5 which makes the ventilation path 8 in the part of (part) 4 can be formed, and bag-making efficiency can be ensured favorable.

  At this time, in the bag making process, the storage bag 1 is heat sealed between the side edge portions 6a and 6b of the bag forming substrate 3, and at the same time other than the portion facing the non-sealed portion 5 of the sheet-like filter piece 9. Since the cylindrical body 6 is heat-sealed, the sheet-like filter piece 9 can be steadily disposed while ensuring good bag-making efficiency.

  Next, the bag making machine 20 will be described with reference to FIG. As shown in FIG. 6, the bag making machine 20 includes a bag forming base material supplying step 22 for feeding and supplying the bag forming base material 3, a folding step 23 for folding the bag forming base material 3 into a cylindrical shape, and a cylindrical shape. A cylindrical body forming step 24 for heat-sealing the side edge portions 6a and 6b of the formed bag forming base material 3 to form the cylindrical body 6, and gusset portions 2 and 2 on the left and right side edges of the cylindrical body 6; A gusset portion forming step 25 that folds and forms a bottom portion 7 by heat-sealing the end edges of the cylindrical body 6, and an outer edge portion of the bottom portion 7 is cut to form the containing bag 1. It has the bag making process 21 which consists of the storage bag formation process 27 and the storage bag accumulation | aggregation process 28 which accumulate | stores the storage bag 1, and makes it possible to manufacture the storage bag 1 continuously and automatically from the bag formation base material 3. .

  In the cylindrical body forming step 24, as shown in FIGS. 4 and 5, the side edge portions 6 a and 6 b of the bag forming substrate 3 are welded to each other by the press heating means 30, and the back pasting portion (polymerization portion) 4. By forming the bag forming base material 3 into the cylindrical body 6, the non-seal portion 5 and the seal portion 10 that form the air passage 8 are formed at the overlapping portion between the side edge portions 6 a and 6 b at the same time. I have to.

  The pressure heating means 30 is disposed so as to straddle the middle part of the conveying belt means 31 that conveys the bag forming substrate 3 in the horizontal direction. That is, the pressing and heating means 30 includes a pair of left and right lifting mechanism portions 32 and 32 disposed on the left and right sides of the conveying belt means 31, and a horizontal support member 33 provided between the both lifting mechanism portions 32 and 32. Two sets are arranged with a space in front and back. The horizontal support members 33 and 33 are formed to extend in the left-right direction, and are arranged in parallel to the front-rear direction so as to extend in the front-rear direction between the central portions of the horizontal support members 33, 33. A support member 34 is installed. A pressing body 40 is attached to the lower surface of the construction support member 34.

  With this configuration, the pressing body 40 is lifted and lowered by the pair of left and right lifting mechanisms 32, 32, so that the pressing body is pressed against the bag forming substrate 3 that is placed on the upper surface of the transport belt means 31 and transported. 40 is freely movable. The pressing body 40 functions as a heat seal bar that is a tool for heat sealing. Further, when the pressing body 40 moves forward with respect to the bag forming substrate 3, the transporting operation of the transport belt means 31 is once stopped, the heat sealing by the pressing body 40 is finished, and the pressing body 40 is turned into the bag. The conveying belt means 31 is intermittently operated so that a conveying operation is performed when the forming substrate 3 moves backward. At least, at the moment when the pressing body 40 heat seals the side edge portions 6a and 6b of the bag forming base material 3 to form the back pasting part (polymerization part) 4, the conveying belt means 31 is stopped and the sealing part It prevents the deviation at the formation position.

  Here, the heat seal includes an external heating method in which heat is applied from the outside and bonding, and an internal heat generation method in which energy waves are applied for bonding, and the external heating method is employed in this embodiment. In other words, the pressing body 40 is a heated metal body such as an iron, and the pressing body 40 is pressed from the outside of the bag forming substrate 3 so that the heat transferred is the heat-welding film 3b of the bag forming substrate 3. Is melted and bonded. In this embodiment, linear low density polyethylene (LLDPE) having a melting point of 117 to 127 ° C. is used as the heat-welding film 3b, and the pressing body 40 is heated to 200 ° C. The heat welding film 3b is melted by pressing instantaneously, and the side edge portions 6a, 6b of the bag forming base material 3 can be bonded to each other.

  Note that the shape of the pressing body 40 is not limited to that of the present embodiment, and may be a roller shape. The internal heat generation method is a technique in which heat is generated on the film by high-frequency radio waves or ultrasonic waves, and is effective for a relatively thick film having poor thermal conductivity.

  4 and 5, reference numeral 50 denotes a folding restriction / heat insulator disposed in the cylindrical body forming step 24. The folding restriction / heat insulator 50 is vertically and vertically narrowed by a heat-insulating silicon rubber material. It is formed in the shape of an elongated rectangular thin plate extending in the direction. The folding regulation / heat insulator 50 is disposed immediately above the bag forming base material 3 that is folded into a cylindrical shape, and the bag forming base material 3 is cylindrical along the left and right side edges of the folding regulation / heat insulation body 50. The right and left widths of the cylindrical body can be regulated by being folded in.

  Moreover, the folding restriction and heat insulator 50 made of a heat-insulating silicone rubber material is disposed between the sheet-like filter piece 9 on the back side of the tubular body 6 and the ventral side of the tubular body 6. The heat applied to the side edge portions 6a and 6b is prevented from being transmitted to the ventral side of the cylindrical body 6 (the back side and the ventral side are thermally welded). Furthermore, the folding restriction and heat insulating body 50 absorbs the pressure applied via the pressing body 40, and the ventral side of the cylindrical body 6 is prevented from being deformed. As a result, the commercial value of the storage bag 1 can be ensured satisfactorily. Reference numeral 51 denotes a support member for supporting the folding restriction / heat insulator 50. The support member 51 is suspended from above the conveying belt means 31, and the lower end thereof has a proximal end portion (rear end portion) of the folding restriction / heat insulator 50. Is attached.

  In FIG. 4, reference numeral 60 denotes a filter piece feeding reel for feeding out the sheet-like filter piece 9, and the tip of the tape-like (thin strip-like) sheet-like filter piece 9 wound around the filter piece feeding reel 60 is a cylindrical body. At the same time, the side edge portions 6a, 6b of the bag forming base material 3 are attached to the back pasting portion (overlapping portion) 4 of 6 and heat-sealed to form the back pasting portion (overlapping portion) 4. The sheet-like filter pieces 9 are successively drawn out from the filter piece feeding reel 60 so that the sheet-like filter pieces 9 are welded to the back pasting portion (overlapping portion) 4. Reference numeral 61 denotes a filter piece guide roller for guiding the sheet-like filter piece 9.

  In FIG. 4, reference numerals 70 and 71 denote first and second conveyance guide rollers for conveying and guiding the bag forming substrate 3. Reference numeral 72 denotes a pair of left and right folding guide rollers for guiding the folding of the bag forming substrate 3.

  Next, 1st other embodiment of the press body as a tool to heat seal is described. That is, as 1st other embodiment, as shown in FIG.7 and FIG.8, the tool to heat seal is divided into the 1st press body 80 and the 2nd press body 81, and is comprised. The first pressing body 80 and the second pressing body 81 have the same basic structure as the pressing body 40, but the shape of the lower surface of each pressing body main piece 82, 83 is different.

  That is, the pressing body piece 82 of the first pressing body 80 is slightly longer than the longitudinal width of the containing bag 1 as shown in FIGS. It is formed in a rectangular bar shape that is slightly wider than that. A lateral groove 84 extending in the width direction of the cylindrical body 6 is formed on the lower surface of the pressing body piece 82 with a predetermined front-rear width W4 at a position where the non-seal portion 5 is formed. That is, the lateral groove 84 is open on the lower side and the left and right sides.

  When configured in this manner and heat-sealed by the first pressing body 80, as shown in FIG. 7C, the non-sealed portion 5 having the same width as the front and rear of the lateral groove 84 is formed, and the non-sealed portion The seal portion 10 is formed at the front and rear positions of 5.

  As shown in FIGS. 8A and 8B, the pressing body piece 83 of the second pressing body 81 is slightly longer than the longitudinal width of the containing bag 1, and is an abbreviation of the left and right width W3 of the sheet-like filter piece 9. It is formed in the shape of a square rod with a width of one third. Then, a pair of pressing body pieces 83 are arranged in parallel with a constant interval W5 on the left and right.

  When the heat sealing is performed by the second pressing body 81 immediately after the heat sealing by the first pressing body 80 configured as described above, as shown in FIG. Is formed so as to have the same seal portion 10 as the interval W5.

  Thus, by forming the seal part 10 and the non-seal part 5 in two stages in order by the first pressing body 80 and the second pressing body 81, the outer side position where the back pasting part (overlapping part) 4 is formed is formed. Thus, the sheet-like filter piece 9 can be heat-sealed. That is, in the bag making process, the front and rear positions of the sheet-like filter piece 9 are positioned by heat-sealing with the first pressing body 80 even when the bag forming substrate 3 is displaced in the width direction from the conveyance flow path. be able to. And it can be made to cooperate so that the outer side position in which the back pasting part (polymerization part) 4 is formed with the 2nd press body 81 after that may be heat-sealed. Therefore, it is possible to satisfactorily ensure the formation of the non-seal portion 5 in the back pasting portion (overlapping portion) 4, and the air passage 8 can be firmly formed in the back pasting portion (overlapping portion) 4.

  FIG. 9 shows a second embodiment of the pressing body as a tool for heat sealing, and the pressing body main piece 91 of the pressing body 90 is, as shown in FIGS. The sheet-like filter piece 9 is formed in a rectangular bar shape that is slightly longer than the vertical width and slightly wider than the left-right width W3. A lateral groove 92 extending in the width direction of the cylindrical body 6 is formed on the lower surface of the pressing body piece 82 with a predetermined front-rear width W6 at a position where the non-seal portion 5 is formed. That is, the lateral groove 92 is open on the lower side and the left and right sides. Here, the front-rear width W6 is narrow, for example, 5 mm.

  When configured in this way and heat-sealed by the pressing body 90, as shown in FIG. 9C, the non-sealed portion 5 having the same width as the front and rear of the lateral groove 92 is formed, and the non-sealed portion 5 The seal portion 10 is formed at the front and rear positions.

  Therefore, in the bag making process, even when the bag forming substrate 3 is displaced in the width direction from the conveyance flow path, the front and rear positions of the sheet-like filter piece 9 are reduced by the heat sealing with the pressing body 90 so that the narrow front and rear width is achieved. While being able to position by W6, the non-seal | sticker part 5 of the same width as the left-right width of the press body 90 can be formed. As a result, it is possible to satisfactorily ensure the formation of the non-seal portion 5 in the back pasting portion (overlapping portion) 4, and the air passage 8 can be firmly formed in the back pasting portion (overlapping portion) 4.

DESCRIPTION OF SYMBOLS 1 Storage bag 2 Gusset part 3 Bag formation base material 3a Bag formation base material main body 3b Heat-weldable film 4 Back sticking part (polymerization part)
5 Non-seal part 6 Cylindrical body 6a Side edge part 6b Side edge part 7 Bottom part 8 Air passage 9 Sheet-like filter piece 10 Seal part

Claims (4)

The side edge portions of the bag-forming base material in which sheets or films having heat-welding properties are laminated on at least one surface are brought into a polymerized state, and the polymerized portion is heat-sealed except for a part as a non-sealed portion. And the bottom edge of the cylindrical body is heat-sealed between the end edges of the cylindrical body,
A part of the side edge portions as the non-seal portion serves as an air passage that communicates the inside and the outside of the cylindrical body, and at least a sheet-like filter piece having air permeability is provided at the location where the air passage is located. An accommodation bag characterized in that the gas generated inside is bonded to the inside of the shaped body and discharged from the air passage through the sheet-like filter piece to the outside.   By forming a non-seal portion forming recess on the lower surface of the pressing body as a tool for heat sealing, the lower surface of the pressing body is brought into surface contact with the overlapping portion between the side edge portions and heat sealed while pressing, The accommodation bag according to claim 1, wherein a non-seal portion is formed in a portion of the overlapping portion facing the recess for forming the seal portion. A lateral groove extending in the width direction of the cylindrical body is formed on the lower surface of the first pressing body as a tool for heat sealing, and the vertical direction of the cylindrical body is formed on the lower surface of the second pressing body as a tool for heat sealing. Forming a longitudinal groove extending in the direction,
The overlapping portion facing the intersecting portion of the transverse groove and the longitudinal groove by heat-sealing while pressing the lower surfaces of the first pressing body and the second pressing body sequentially in contact with the overlapping portions of the side edge portions. The container bag according to claim 1, wherein a non-seal portion is formed in the portion.   The sheet-like filter piece is formed in a band shape that is wider than the overlapping width of the side edge portions of the bag forming base material and extends in the longitudinal direction of the tubular body, and the sheet-like filter piece is disposed inside the tubular body. The side edge portions of the bag-forming base material are heat-sealed, and at the same time, the portion other than the portion facing the non-sealed portion of the sheet-like filter piece is heat-sealed to the cylindrical body. 4. The storage bag according to any one of 3 above.

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