Bag with a flow outlet

Abstract

The present invention provides a bag with a flow outlet, which improves the self-standing property of the bag body with a simple structure. The bag with a flow outlet (10) is configured such that, in a state where the bag bottom (20a) is placed downward, the content liquid is poured out from the flow outlet (60) assembled to the side surface of the bag body (20). The bag body (20) further has a first shape control sealing portion (24), which is formed by welding a portion of the first film (30) located more inward in the left-right direction than the first side sealing portion (23a) to the side film (40). The first shape control sealing portion (24) is formed to have a portion in a region between the upper half of the flow outlet fixing portion (32) and the first side sealing portion (23a), and not to have a portion at a position more downward than the vertical center of the flow outlet fixing portion (32).

Description

Technical Field

[0001] The present invention relates to a bag with a flow outlet, which is configured to pour out the content liquid from the flow outlet assembled on the side surface of the bag body in a state where the bottom of the bag is placed downward. Background Art

[0002] Conventionally, as a container for accommodating content liquids such as drinking water and liquid detergents, a bag with a flow outlet has been known, in which a flow outlet as a pour-out port is assembled to a bag body formed by heat-sealing a plurality of resin films (for example, refer to Patent Document 1).

[0003] In addition, regarding such a bag with a flow outlet, the following usage form is also known: as Figure 6 shown, in a state where the bottom of the bag is placed downward, the content liquid is poured out from the flow outlet assembled on the side surface of the bag body.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2012-121611 Summary of the Invention

[0007] However, since the resin film constituting the bag body has flexibility, especially when the bag body is formed with a large capacity such as 6 L, as Figure 6 shown in the left lower and right lower views of the bag observed from the side, sometimes due to the self-weight of the content liquid, a so-called bulge (barrel bulge) is generated in the lower part of the bag body 120 in such a manner that each of the films 130, 140, 150 expands outward. In addition, due to such a bulge, as Figure 6 shown in the lower middle view, sometimes a buckling induction site P is formed near the lower part of each side seal part 123a, 123b, causing the films 130, 140, 150 to bend and dent inward.

[0008] Moreover, in the case where such a buckling induction site P is formed, there is a problem that buckling of the bag body 120 easily occurs starting from the buckling induction site P, resulting in a decrease in the self-standing property of the bag with a flow outlet.

[0009] Therefore, the present invention is used to solve the above problems, and an object thereof is to provide a bag with a flow outlet that improves the self-standing property of the bag body with a simple structure.

[0010] The present invention relates to a bag with a flow outlet, which is configured to pour out the content liquid from the flow outlet assembled on the side surface of the bag body in a state where the bottom of the bag is placed downward. The bag body has: a first film having a fixing portion for the flow outlet of the flow outlet fixed thereto; and side films connected to the first film by first side sealing portions formed on the left and right sides of the first film. The bag body further has a first shape control sealing portion formed by welding a portion of the first film located more inward in the left-right direction than the first side sealing portion to the side films. The first shape control sealing portion is formed to have a portion in the region between the upper half of the fixing portion for the flow outlet and the first side sealing portion, and not to have a portion at a position lower than the vertical center of the fixing portion for the flow outlet, thereby solving the above problems.

[0011] Advantages of the Invention

[0012] According to the invention related to Technical Solution 1, the bag body further has a first shape control sealing portion formed by welding a portion of the first film located more inward in the left-right direction than the first side sealing portion to the side films. The first shape control sealing portion is formed to have a portion in the region between the upper half of the fixing portion for the flow outlet and the first side sealing portion, and not to have a portion at a position lower than the vertical center of the fixing portion for the flow outlet. Thus, it is possible to adjust the inclination of the fixing portion for the flow outlet, and by using this adjustment of the inclination of the fixing portion for the flow outlet, it is possible to suppress the generation of a buckling induction site that is likely to be formed near the lower side portion of the first side sealing portion.

[0013] That is, in the invention related to Technical Solution 1, the vicinity of the first film where the first shape control sealing portion is formed is recessed in a valley shape more toward the inside of the bag than the surrounding portions. As a reaction, the vicinity of the portion of the first film located below the first shape control sealing portion bulges in a mountain shape toward the outside of the bag. In this way, it is possible to adjust the inclination of the fixing portion for the flow outlet so that the upper side of the fixing portion for the flow outlet moves toward the inside of the bag and the lower side moves toward the outside of the bag. Thus, it is possible to suppress the generation of a buckling induction site that is likely to be formed near the lower side portion of the first side sealing portion by using the above adjustment of the inclination of the fixing portion for the flow outlet, and it is possible to improve the self-standing property of the bag with a flow outlet.

[0014] According to the invention related to Technical Solution 3, the first shape control seal portions are respectively formed on the left and right sides of the fixing portion for the outflow port with a space therebetween. Thus, it is possible to reliably adjust the inclination of the fixing portion for the outflow port from the left and right sides, and therefore, it is possible to reliably suppress the generation of buckling induction portions that are likely to be formed near the lower side portions of the first side seal portions on the left and right sides.

[0015] According to the invention related to Technical Solution 4, the first shape control seal portion is formed continuously with the first side seal portion. Thus, it is possible to prevent the situation where the content liquid remains between the first side seal portion and the first shape control seal portion, which is likely to occur when the first shape control seal portion is formed independently of the first side seal portion.

[0016] According to the invention related to Technical Solution 5, the bag body further has a second shape control seal portion which is formed by welding a portion of the second film located more inward in the left - right direction than the second side seal portion to the side film. As a result, the vicinity of the second film where the second shape control seal portion is formed is recessed in a valley shape more toward the inside of the bag than the surrounding portions. As a reaction, the portion near the lower side of the second shape control seal portion in the second film bulges in a mountain shape toward the outside of the bag. In this way, it is possible to suppress the generation of buckling induction portions that are likely to be formed near the lower side portion of the second side seal portion.

[0017] In addition, regarding the first film to which the outflow port is fixed, the expansion of the phenomenon that the portion near the lower side of the first shape control seal portion in the first film bulges in a mountain shape is suppressed by the fixing portion for the outflow port to which the outflow port is fixed. However, regarding the second film to which the outflow port is not fixed, the expansion of the phenomenon that the portion near the lower side of the second shape control seal portion in the second film bulges in a mountain shape can extend to a lower position compared to the first film. Thus, it is possible to suppress the generation of buckling induction portions that are likely to be formed near the lower side portion of the second side seal portion, and it is possible to form the second shape control seal portion at a higher position in the up - down direction than the first shape control seal portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a perspective view showing a state where a bag with an outflow port according to an embodiment of the present invention is placed on a placement surface in a use state.

[0019] Figure 2 FIG. 2 is an explanatory view showing each film constituting the bag with an outflow port.

[0020] Figure 3 FIG. 3 is an explanatory view showing the first film.

[0021] Figure 4It is an explanatory diagram for explaining the effects brought about by the formation of the first shape control sealing portion.

[0022] Figure 5 It is an explanatory diagram showing a modified example of the formation position of the welding portion for the control sealing portion.

[0023] Figure 6 It is a reference diagram for explaining the problems of an existing bag with a flow outlet. Detailed implementation mode

[0024] Hereinafter, a bag 10 with a flow outlet according to an embodiment of the present invention will be described based on the accompanying drawings.

[0025] The bag 10 with a flow outlet accommodates content liquids such as drinking water and liquid detergent. Figure 1 The perspective view showing the bag 10 from the outside is shown. As Figure 1 shown, when using the bag 10, in a state where the bag bottom 20a is placed downward, the content liquid is poured out from the flow outlet 60 assembled on the side surface of the bag body 20.

[0026] As Figure 1 shown, the bag 10 with a flow outlet has: a bag body 20 formed by heat-sealing flexible films 30, 40, and 50 to form a bag-making sealing portion 23 and then formed into a bag shape; a flow outlet 60 assembled to the bag body 20; and an inner film 70 disposed inside the bag body 20. The bag 10 with a flow outlet is used while being accommodated in an outer packaging case (not shown) during use, display, and transportation.

[0027] As Figure 1 shown, the bag body 20 is configured as a so-called horizontal gusset type bag having gusset portions 22 formed on both side portions, and has: a first film 30 to which the flow outlet 60 is assembled; two side films 40 connected to the first film 30 by first side sealing portions 23a formed on the left and right sides of the first film 30; and a second film 50 disposed opposite to the first film 30 with the content liquid accommodating portion 21 therebetween and connected to the side films 40 by second side sealing portions 23b formed on the left and right sides thereof. In addition, in Figure 1 only the flange 61 of the flow outlet 60 is shown.

[0028] Each of the films 30, 40, and 50 is formed as a rectangular (or approximately rectangular) resin film having a heat-sealing layer on at least one side surface, and is arranged such that the heat-sealing layers face each other at the portions where they are heat-sealed to each other.

[0029] The heat-sealing regions of each of the films 30, 40, and 50 are as follows. In addition, in Figure 2 etc., each heat-sealing region is shown in a filled manner.

[0030] First, as Figure 2 shown, the first film 30 has: left and right side seal portion heat-sealing regions 31 that are heat-sealed to the side films 40; and an outlet fixing portion 32 to which the outlet 60 (flange 61) is fixed. In the present embodiment, the flange 61 is heat-sealed to the inner surface of the bag in the first film 30.

[0031] In addition, as Figure 2 shown, each side film 40 has: a side seal portion heat-sealing region 41 that is heat-sealed to the first film 30 or the second film 50; a top seal portion heat-sealing region 42 and a bottom seal portion heat-sealing region 43 that are heat-sealed to another side film 40; and an inner film heat-sealing region 44 that is heat-sealed to the inner film 70.

[0032] In addition, as Figure 2 shown, the second film 50 has: left and right side seal portion heat-sealing regions 51 that are heat-sealed to the side films 40.

[0033] The side seal portion heat-sealing region 31 of the first film 30 and the side seal portion heat-sealing region 41 of the side film 40 are heat-sealed to form the first side seal portion 23a. In addition, the side seal portion heat-sealing region 51 of the second film 50 and the side seal portion heat-sealing region 41 of the side film 40 are heat-sealed to form the second side seal portion 23b.

[0034] In addition, the top seal portion heat-sealing regions 42 of the side films 40 are heat-sealed to each other, and at a position corresponding to the top of the bag body 20, the inner film heat-sealing region 44 of the side film 40 and the inner film 70 are heat-sealed to form the top seal portion 23c. In addition, the bottom seal portion heat-sealing regions 43 of the side films 40 are heat-sealed to each other, and at a position corresponding to the bottom of the bag body 20, the inner film heat-sealing region 44 of the side film 40 and the inner film 70 are heat-sealed to form a bottom seal portion (not shown).

[0035] The first side seal portion 23a, the second side seal portion 23b, the top seal portion 23c, and the bottom seal portion (not shown) form the bag-making seal portion 23.

[0036] As Figures 1 - 3 shown, the bag body 20 further has a first shape control seal portion 24, which is formed by heat-sealing a portion (control seal portion welding portion 33) of the first film 30 that is located more inward in the left-right direction than the first side seal portion 23a (side seal portion heat-sealing region 31) to a part (control seal portion welding portion 45) of the side film 40.

[0037] As Figures 1 - 3 shown, the first shape control sealing portion 24 (welding portion 33 for the control sealing portion) is formed on the left and right sides of the fixing portion 32 (flange 61) for the flow outlet so as to continuously protrude inward in the left and right directions (about 0.5 to 2.0 mm) from each first side portion sealing portion 23a (heat fusion welding region 31 for the side portion sealing portion).

[0038] As Figure 3 shown, the first shape control sealing portion 24 (welding portion 33 for the control sealing portion) has a portion in the region between the upper half of the fixing portion 32 (flange 61) for the flow outlet and the first side portion sealing portion 23a (heat fusion welding region 31 for the side portion sealing portion). In the present embodiment, the entire first shape control sealing portion 24 (welding portion 33 for the control sealing portion) is located in the region between the upper half of the fixing portion 32 (flange 61) for the flow outlet and the first side portion sealing portion 23a (heat fusion welding region 31 for the side portion sealing portion).

[0039] In addition, as Figure 3 shown, the first shape control sealing portion 24 (welding portion 33 for the control sealing portion) is formed such that it does not have a portion located below the vertical center of the fixing portion 32 for the flow outlet.

[0040] In addition, regarding the side film 40, as Figure 2 shown, it also has a welding portion 45 for the control sealing portion that continuously protrudes inward in the left and right directions from the heat fusion welding region 41 for the side portion sealing portion at a position corresponding to the welding portion 33 for the control sealing portion of the first film 30.

[0041] Regarding the vicinity of the first side portion sealing portion 23a (heat fusion welding regions 31, 41 for the side portion sealing portion) where the first shape control sealing portion 24 (welding portions 33, 45 for the control sealing portion) is formed, as Figure 1 、 Figure 2 shown, it is formed in a strip shape in the vertical direction and has an inner edge that extends linearly in the vertical direction.

[0042] In addition, as Figure 1 、 Figure 2 shown, the bag body 20 further has a second shape control sealing portion 25, which is formed by welding a portion (welding portion 52 for the control sealing portion) of the second film 50 that is located more inward in the left and right directions than the second side portion sealing portion 23b (heat fusion welding region 51 for the side portion sealing portion) and a part (welding portion 46 for the control sealing portion) of the side film 40.

[0043] As Figure 1 、 Figure 2As shown, the second shape control seal part 25 (welding part 52 for control seal part) is formed to project continuously from each second side seal part 23b (heat fusion welding area 51 for side seal part) toward the inner side in the left-right direction (about 0.5 to 2.0 mm).

[0044] As Figure 1 , Figure 2 shown, the entire second shape control seal part 25 is formed at a position higher than the first shape control seal part 24 in the up-down direction.

[0045] In addition, in the present embodiment, the dimension from the bag bottom 20a to the lower end of the second shape control seal part 25 is about 90 mm, and the dimension from the bag bottom 20a to the lower end of the first shape control seal part 24 is about 60 mm.

[0046] Further, regarding the side film 40, as Figure 2 shown, it also has a welding part 46 for control seal part that projects continuously from the heat fusion welding area 41 for side seal part toward the inner side at a position corresponding to the welding part 52 for control seal part.

[0047] Regarding the vicinity of the second side seal part 23b (heat fusion welding areas 41 and 51 for side seal part) where the second shape control seal part 25 (welding parts 46 and 52 for control seal part) is formed, as Figure 1 , Figure 2 shown, it is formed in a band shape in the up-down direction and has an inner edge that extends linearly in the up-down direction.

[0048] As Figure 1 shown, the bag body 20 has a bag bottom 20a, and when the bag body 20 is placed on a placement surface (not shown) in the use state (waiting to be poured out state) of the bag 10 with a flow outlet through which the content liquid can be poured out, the bag bottom 20a functions as a bottom.

[0049] The bag bottom 20a is a part where, in the state where the bag 10 with a flow outlet is placed on a flat placement surface (horizontal plane), due to the weight of the content liquid, the respective films 30, 40, 50, and 70 are bent and reach the placement surface (not shown). In the case of the present embodiment, a part of the respective films 30, 40, 50, and 70 constitutes the bag bottom 20a. Figure 2 The bending predetermined parts 34, 47, 53, and 72 of the respective films 30, 40, 50, and 70 are shown in

[0050] The flow outlet 60 is formed of synthetic resin or the like, is assembled to the bag body 20, and functions as an outlet for the content liquid.

[0051] The outlet 60 has an outlet body (not shown), most of which is disposed outside the bag body 20, and a flange 61 as a fixing portion of the outlet, which is integrally formed with the outlet body (not shown), disposed inside the bag body 20, and fixed to the inner surface of the first film 30 by heat welding. In addition, Figure 4 (a) shows a perspective view of the flange 61 as viewed from the outside of the bag, Figure 4 (b) shows a view of a part of the flange 61 as viewed from the side of the bag. In addition, Figure 4 Only the flange 61 in the outlet 60 is shown.

[0052] As Figure 1 shown, the flange 61 is formed into a disk-shaped portion having a pouring hole 62 formed at its center. In addition, as Figure 3 shown, a pouring hole 35 is also formed in the first film 30 at a position corresponding to the pouring hole 62.

[0053] As Figure 1 , Figure 4 shown, the outlet 60 (flange 61) is assembled at a position on the side surface of the bag body 20 that is closer to the bottom 20a of the bag than the center in the height direction (the center in the length direction of the first film 30). Therefore, as Figure 4 shown, when the first film 30 expands outward due to the self-weight of the content liquid, the flange 61 of the outlet 60 is inclined with respect to the vertical direction such that its upper side is more outside the bag than its lower side.

[0054] The inner film 70 is formed into a rectangular (or approximately rectangular) resin film having a heat-welding layer on at least one side and having flexibility. According to Figure 1 , Figure 2 it can be seen that the inner film 70 is disposed inside the bag body 20 (content liquid storage portion 21) in a state of being folded in half, and a specified portion thereof is heat-welded to the inner film heat-welding region 44 of the side film 40.

[0055] As Figure 2 shown, a plurality of film through-holes 71 that penetrate in the film thickness direction and are formed in a hole shape are formed in the inner film 70.

[0056] In addition, as Figure 1 shown, a handle hole 26 is formed at the bag-making seal portion 23 on the top side of the bag 10 with an outlet, at a portion where the films 40 and 70 overlap. The handle hole 26 is formed by penetrating the overlapping portion of the films 40 and 70 and is used for a user to hold the bag 10 with an outlet by hand or fingers.

[0057] Regarding the bag 10 with an outlet thus obtained, by forming the first shape control seal portion 24, as Figure 4As shown, in the vicinity R1 near the first shape control seal portion 24 formed in the first film 30 is recessed in a valley shape more toward the inside of the bag than the surrounding portion. As a reaction thereto, in the first film 30, the vicinity R2 of the portion located below the first shape control seal portion 24 bulges in a mountain shape toward the outside of the bag (thus generating tension in the first film 30). In this way, the inclination of the flange (fixed portion of the flow outlet) 61 fixed to the first film 30 can be adjusted in such a manner that the upper side of the flange (fixed portion of the flow outlet) 61 moves toward the inside of the bag and the lower side of the flange (fixed portion of the flow outlet) 61 moves toward the outside of the bag. Thus, by adjusting the inclination of such a flange (fixed portion of the flow outlet) 61, the first film 30 near the lower side of the flange (fixed portion of the flow outlet) 61 moves toward the outside of the bag, thereby being able to suppress Figure 6 the generation of a buckling induction site P that is likely to be formed in the lower side portion of the first side seal portion 23a (heat-sealing area 31 for side seal), and the self-standing property of the bag 10 with a flow outlet can be improved.

[0058] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention described in the claims. In addition, the bag 10 with a flow outlet can be configured by arbitrarily combining the structures of the above embodiments and the modification examples described later.

[0059] For example, in the above embodiment, it has been described that the bag 10 with a flow outlet is used, displayed, and transported while being housed in an outer packaging case (not shown). However, the bag 10 with a flow outlet itself can also be used, displayed, or transported without being housed in an outer packaging case (not shown).

[0060] In addition, regarding the specific forms of the respective films 30, 40, 50, and 70, if it is a film having a heat-sealable layer such as an olefin type having low-density polyethylene or polypropylene on at least one side, a polyester type such as PET (polyethylene terephthalate), etc., a single film or a heat-sealable layer can be laminated with any layer. The materials constituting the laminate can be any materials as long as they are laminated with known polyesters such as PET and PBT (polybutylene terephthalate), polypropylene, polyamide, polyethylene, aluminum foil, etc. arbitrarily.

[0061] In addition, in the above embodiment, it has been described that the bag body 20 is formed of four films 30, 40, 50. However, the specific form of the bag body 20 such as the number of films constituting the bag body 20 is not limited to the above form.

[0062] In addition, the inner film 70 may not be provided.

[0063] In addition, in the above-described embodiment, the following case has been described: the first film 30 (and the second film 50) equipped with the outlet 60 is a film for gusset portions, however, the first film 30 (and the second film 50) does not necessarily have to be a film for gusset portions.

[0064] In addition, in the above-described embodiment, the following case has been described: the entire first shape control sealing portion 24 (the welding portion 33 for the control sealing portion) is located in the region between the upper half of the fixing portion 32 for the outlet (the flange 61) and the first side sealing portion 23a (the heat fusion welding region 31 for the side sealing portion), however, it may be formed as Figure 5 shown in (a) such that a part of the first shape control sealing portion 24 is located in the region between the upper half of the fixing portion 32 for the outlet (the flange 61) and the first side sealing portion 23a (the heat fusion welding region 31 for the side sealing portion). In addition, in Figure 5 the case of (a), it is also preferable that the portion of the first shape control sealing portion 24 (the welding portion 33 for the control sealing portion) that is closest to the center in the left-right direction of the first film 30 is located in the region between the upper half of the fixing portion 32 for the outlet (the flange 61) and the first side sealing portion 23a (the heat fusion welding region 31 for the side sealing portion).

[0065] In addition, in the above-described embodiment, the following case has been described: the first shape control sealing portion 24 (the welding portions 33 and 45 for the control sealing portion) is continuously formed with the first side sealing portion 23a (the heat fusion welding regions 31 and 41 for the side sealing portion), however, it may be formed as Figure 5 shown in (a) such that the first shape control sealing portion 24 (the welding portions 33 and 45 for the control sealing portion) is formed independently of the first side sealing portion 23a (the heat fusion welding regions 31 and 41 for the side sealing portion) (formed at a position separated therefrom). Similarly, the second shape control sealing portion 25 (the welding portions 46 and 52 for the control sealing portion) may also be formed independently of the second side sealing portion 23b (the heat fusion welding regions 41 and 51 for the side sealing portion) (formed at a position separated therefrom).

[0066] In addition, in the above-described embodiment, the following case has been described: one first shape control sealing portion 24 is formed on each of the left and right sides with the fixing portion 32 for the outlet interposed therebetween, however, the first shape control sealing portion 24 may be formed only on one of the left and right sides of the fixing portion 32 for the outlet. In other words, although two first shape control sealing portions 24 are formed in the above-described embodiment, only one first shape control sealing portion 24 may be formed. Similarly, the second shape control sealing portion 25 may be formed not as two but as only one.

[0067] In addition, in the above-described embodiment, the following has been described: the flange 61 is formed in a disk shape with a pouring hole 62 formed in the center thereof. However, the specific shape of the flange 61 may be any shape such as a rectangle or a polygon with a pouring hole 62 formed in the center thereof.

[0068] In addition, in the above-described embodiment, the following has been described: the fixed portion 61 of the outflow port heat-sealed to the bag body 20 is the flange 61 of the outflow port 60. However, the fixed portion 61 of the outflow port does not have to be the flange 61. In other words, a part of the outflow port 60 other than the flange 61 may be fixed to the bag body 20.

[0069] In addition, in the above-described embodiment, the following has been described: the flange 61 as the fixed portion 61 of the outflow port is fixed to the inner side surface of the first film 30. However, the flange 61 may be fixed to the outer side surface of the first film 30.

[0070] In addition, the method of fixing the flange 61 as the fixed portion of the outflow port to the first film 30 may be any method such as pasting in addition to heat-sealing.

[0071] Furthermore, in this specification, terms indicating up and down such as "top", "bottom", and "side" are used. However, the above terms do not limit the setting orientation of the bag 10 with an outflow port during display, transportation, etc. For example, during display, transportation, etc., the bag 10 with an outflow port may be set on the placement surface with the side or top facing down.

[0072] Explanation of Reference Numerals

[0073] 10... Bag with an outflow port

[0074] 20... Bag body

[0075] 20a... Bag bottom

[0076] 21... Content liquid storage portion

[0077] 22... Gusset portion

[0078] 23... Bag-making seal portion

[0079] 23a... First side seal portion

[0080] 23b... Second side seal portion

[0081] 23c... Top seal portion

[0082] 24... First shape control seal portion

[0083] 25... Second shape control seal portion

[0084] 26... Handle hole

[0085] 30… First film

[0086] 31… Heat-sealing area for side seal

[0087] 32… Fixing part for outlet

[0088] 33… Welding part for control seal

[0089] 34… Predetermined bending position

[0090] 35… Pouring hole

[0091] 40… Side film

[0092] 41… Heat-sealing area for side seal

[0093] 42… Heat-sealing area for top seal

[0094] 43… Heat-sealing area for bottom seal

[0095] 44… Heat-sealing area for inner film

[0096] 45… Welding part for control seal

[0097] 46… Welding part for control seal

[0098] 47… Predetermined bending position

[0099] 50… Second film

[0100] 51… Heat-sealing area for side seal

[0101] 52… Welding part for control seal

[0102] 53… Predetermined bending position

[0103] 60… Outlet

[0104] 61… Flange (fixed part of outlet)

[0105] 62… Pouring hole

[0106] 70… Inner film

[0107] 71… Film through-hole

[0108] 72… Predetermined bending position

Claims

1. A bag with a flow outlet, configured such that in a state where the bag bottom is placed downward, the content liquid is poured out from the flow outlet assembled to the side surface of the bag body. It is characterized in that the bag body has: a first film having a fixing portion for the flow outlet where the flow outlet of the flow outlet is fixed; and side films connected to the first film by first side sealing portions formed on the left and right sides of the first film. The bag body further has a first shape control sealing portion formed by welding a portion of the first film located more inward in the left - right direction than the first side sealing portion to the side films. The first shape control sealing portion is formed to have a portion in the region between the upper half of the fixing portion for the flow outlet and the first side sealing portion, and not to have a portion at a position lower than the vertical center of the fixing portion for the flow outlet.

2. The bag with a flow outlet according to claim 1, characterized in that the portion of the first shape control sealing portion closest to the center in the left - right direction of the first film is in the region between the upper half of the fixing portion for the flow outlet and the first side sealing portion.

3. The bag with a flow outlet according to claim 1 or 2, characterized in that the first shape control sealing portions are respectively formed on the left and right sides of the fixing portion for the flow outlet with the flow outlet therebetween.

4. The bag with a flow outlet according to any one of claims 1 to 3, characterized in that the first shape control sealing portion is formed continuously with the first side sealing portion.

5. The bag with a flow outlet according to any one of claims 1 to 4, characterized in that the bag body has a second film, which is arranged to face the first film with a content liquid storage portion therebetween. The second film is connected to the side films by second side sealing portions formed on the left and right sides of the second film. The bag body further has a second shape control sealing portion formed by welding a portion of the second film located more inward in the left - right direction than the second side sealing portion to the side films. The second shape control sealing portion is formed at a position higher in the vertical direction than the first shape control sealing portion.

Images