JP6020894B2 - Package with check valve, manufacturing apparatus and manufacturing method thereof - Google Patents

Description

The present invention relates to a package including a check valve made of a sheet, a manufacturing apparatus thereof, and a manufacturing method thereof.

The inventor of the present invention has developed a check valve made of a sheet as shown in Patent Documents 1 and 2.
The check valve of Patent Document 1 includes a flexible resin base sheet and a plurality of valve body sheets, and the base sheets are provided to face each other in the front and back direction. Among them, at least two sheets of the upstream valve body sheet disposed on the upstream side with respect to the airflow direction at the time of discharge and the downstream valve body sheet disposed on the downstream side are set as one set.
In each valve body sheet, one end side is bonded to the base sheet on one side, and the distal end side approaches and separates from the base sheet, thereby opening and closing the valve.

Patent Document 2 is intended to provide a check valve that allows a fluid to open and pass well during forward flow. This check valve has a base sheet on one side having a sealing property, an inlet. , Each of the sheets of the valve seat, the auxiliary seat and the base seat on the other side of the sealing. Between the base sheet on the other side and the valve seat becomes a valve flow path, and the forward fluid flows out from the outflow port through the valve flow path. The upstream end of the valve seat is fixed by a valve seal, and the downstream side is in a freely movable state. An introduction recess is formed in the valve seal and the base sheet on one side of the inlet.

Patent Documents 1 and 2 prevent a check valve, in particular, an inflow (reverse flow) of fluid from the outside, which causes the fluid to flow out to the outside when the fluid inside the package has a higher pressure than the outside. (Of course, this does not deny use as a check valve for other purposes). In particular, Patent Document 2 provides a check valve that allows the fluid passing through the valve passage to open and pass through the valve passage well during forward flow by the introduction recess.

However, these inventions have been made mainly on the improvement of the check valve, and the attachment to the package is not sufficiently considered. In particular, when a check valve is attached to a package, it is often welded to a sheet constituting the package by heat sealing in which heating and pressurization are applied as necessary. For this reason, the state of the valve passage of the check valve may change due to this heat sealing, and the designed valve function (specifically, the function of opening the valve with fluid during forward flow) may not be achieved. It was. In particular, there are thick sheets constituting the package, and the heat-sealed portion that adheres these sheets is wider than the heat-sealed that adheres the check-sheet constituting sheet, and is strongly welded. For this reason, the heat-sealed portion of the package tends to become hard, and restricts the delicate and delicate movement of the check valve.

Japanese Patent No. 4436925 Japanese Patent No. 4761408

This invention makes it a subject to provide the package body with a non-return valve which can open the valve | bulb well and can pass the fluid which passes a valve passage at the time of forward flow.
This invention makes it a subject to provide the manufacturing apparatus suitable for manufacturing the package body with a non-return valve which the fluid which passes a valve channel at the time of a forward flow can open a valve favorably.
This invention makes it a subject to provide the manufacturing method suitable for manufacturing the package body with a non-return valve in which the fluid which passes a valve channel can open a valve favorably at the time of forward flow.

The present invention includes a check valve made of a sheet for controlling fluid, and a package body to which the check valve is attached, and the check valve includes an upstream port and a downstream port, An open state that allows a forward flow that flows into the valve passage in the check valve and flows out from the downstream port, and a closed state that stops the reverse flow that flows into the valve passage from the downstream port and flows out from the upstream port The package includes a front packaging sheet disposed on the front side of the check valve and a back packaging sheet disposed on the back side of the check valve, and the front and back surfaces of the check valve The check packaging valve is attached to the package by adhering the front packaging sheet and the back packaging sheet, and either the upstream port or the downstream port is The other one of the upstream port and the downstream port disposed inside the package The check valve is disposed outside the package body, and the check valve is bonded to the front package sheet and the back package sheet with a transverse seal between the upstream port and the downstream port and across the valve passage. In the package with a check valve, there is provided a package characterized by the following means.

In the package of the present invention, at least at the position including the transverse seal, a dent is formed with respect to the front wrapping sheet, the back wrapping sheet, and the check valve. The front packaging sheet, the back packaging sheet, and the check valve are deformed into at least one of the front and back sides.

Due to this dent, not only the check valve but also the front packaging sheet and the back packaging sheet are deformed in the thickness direction. As a result, the fluid is easily introduced into the valve passage during the forward flow. Can pass through the valve with good opening.

Further, the present invention is an apparatus for manufacturing the package body, wherein the front and back surfaces of the check valve are sandwiched to bond the front and back packaging sheets to form the transverse seal. A dent forming device that forms dents on the front packaging sheet, the back wrapping sheet, and the check valve at a position including the cross seal that has been adhered, The apparatus has a male mold having a convex portion and a receiving mold for receiving the male mold at positions facing each other with the front packaging sheet, the back packaging sheet, and the check valve interposed therebetween, and the male mold Provided is a packaging body manufacturing apparatus in which the dent is formed by approaching a receiving mold.

The dent forming device includes a front stage that forms a first dent by recessing the front wrapping sheet, the back wrapping sheet, and the check valve on either the front or back side, and the first dent is And a rear stage that is recessed on either the other side after being formed to form a second dent, and the front stage and the rear stage each include a male mold and a receiving mold, It is made at a position where at least a part of the first dent and the second dent overlap each other, and the male mold and the receiving mold of the rear stage are the male mold of the front stage and the The receiving mold can be implemented as being arranged at the opposite positions across the front packaging sheet, the back packaging sheet, and the check valve.

The check valve includes a base sheet that defines the valve passage by being disposed opposite to the front and back, and at least one valve body sheet disposed between the plurality of base sheets. cage, the valve body seat, the upstream side is provided with a glued valve seal against the front and back one of the base sheet, it is possible to downstream movement in the thickness direction, and the open state by the movement The valve-closed state is switched, and the transverse seal and the valve seal are formed by the same adhesion, or at least partly adhered at an overlapping position. Can do.

Further, the adhesion of the transverse seal is an adhesion by heat sealing, and the dent may include at least one dent formed on the transverse seal after the adhesion of the heat seal.
Further, the transverse seal is provided with a diving opening in a part thereof, and in the diving opening, an upstream portion of the transverse seal is recessed downstream, or a portion of the transverse seal is not provided. Thus, the width in the upstream and downstream direction of the transverse seal is smaller than the width of the transverse seal in other portions, and the diverting port causes the forward fluid to flow from the diving port into the valve passage. It can be easily introduced.
The dent is a streak formed between the first transverse seal and the second transverse seal when the first and second plurality of transverse seals are provided. It can be implemented as a dent formed in a direction across the valve passage.

The present invention also includes the check valve sandwiched between the front packaging sheet and the back packaging sheet, and the check valve is temporarily secured to at least one of the front packaging sheet and the back packaging sheet. A step of forming a transverse seal for adhering the front packaging sheet and the back packaging sheet across the front and back of the check valve, and the front packaging sheet and the back packaging at a position including the transverse seal. A package body comprising a step of forming an introduction dent for forming a concave portion using a male mold having a convex portion and a receiving mold for receiving the male mold with respect to the sheet and the valve body sheet. A manufacturing method is provided.
In that case, the said dent is formed with respect to the said front packaging sheet, the said back packaging sheet, and the said valve body sheet over the position without the said valve body sheet, and the position with the said valve body sheet. It may be.

According to the present invention, at least three of the front packaging sheet, the back packaging sheet, and the check valve are formed at the position including the transverse seal, so that fluid flows smoothly in the valve passage during forward flow. Introduced, it was possible to provide a package with a check valve that allows the fluid to pass through the valve well.
Moreover, this invention has provided the manufacturing apparatus suitable for manufacturing such a package body with a check valve, and the manufacturing method of the package body.

(A) The check valve which concerns on the 1st Embodiment of this invention is shown, (A) is a rear view, (B) is the longitudinal cross-sectional view, (C) is a longitudinal cross-sectional view which shows the example of a change. The 1st manufacturing process of the package provided with the check valve is shown, (A) is a rear view, (B) is the longitudinal cross-sectional view. The 2nd manufacturing process of the package provided with the check valve is shown, (A) is a rear view, (B) is the same longitudinal section, (C) is a longitudinal section showing the same modification. The 3rd manufacturing process of the package provided with the check valve is shown, (A) is a rear view, (B) is the same longitudinal section, (C) is a longitudinal section showing the same modification. The principal part top view of the dent formation apparatus in the 3rd manufacturing process. (A) The perspective view of the package in the 3rd manufacturing process, (B) The principal part perspective view of the package in the 4th manufacturing process of the package provided with the check valve. The principal part longitudinal cross-sectional view of the package in the 4th manufacturing process of the package provided with the check valve. (A) The front view of the completed package, (B) The cross-sectional view which shows the folding structure of the sheet | seat of the package. The perspective view seen from the bottom face of the completed package. The arrangement | sequence diagram of the manufacturing apparatus of the package. Explanatory drawing of the principal part of the package body provided with the check valve which concerns on other embodiment of this invention. The example of a change of the non-return valve used for the package of this invention is shown, (A) is a rear view, (B) is the longitudinal cross-sectional view. The other example of the non-return valve used for the package of this invention is shown, (A) is a rear view, (B) is the longitudinal cross-sectional view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, with reference to FIGS. 1-10, the package 21 which concerns on 1st Embodiment, its manufacturing process, and a manufacturing apparatus are demonstrated.

(Outline) As shown in FIGS. 8 and 9, the packaging body 21 according to this embodiment is a bag body constituted by a sheet-like body such as a synthetic resin sheet. The packaging body 21 includes a front packaging sheet 22 and a back packaging sheet 23, and the check valve 10 is sandwiched and fixed between the front packaging sheet 22 and the back packaging sheet 23.

This package 21 is continuously manufactured by the apparatus shown in FIG. This apparatus is an apparatus that draws out a roll 70 around which a web to be a front packaging sheet 22 and a back packaging sheet 23 is wound, performs processing in each of the stages 71 to 75, and completes the packaging body 21. The processing by this apparatus is to manufacture the packaging body 21 by attaching the check valve 10 shown in FIG. 1 to the front packaging sheet 22 and the back packaging sheet 23, and will be described in detail with reference to FIGS. Each process is sequentially processed.

(Packaging body) The packaging body 21 can contain various things such as solid food. In particular, carbon dioxide generated from roasted coffee beans, gas from fermented foods such as miso, air expanded by heating in a microwave oven, degassing when compressing clothing compression bags, etc. It can implement suitably as a required package. However, the fluid passing through the check valve may be gas or liquid.

Although the packaging body 21 may be composed of only a flexible sheet such as the front packaging sheet 22 and the back packaging sheet 23, a part of the packaging body 21 is composed of a rigid container, and the front packaging is performed only on a portion where the check valve 10 is provided. The sheet 22 and the back packaging sheet 23 can also be used. The front packaging sheet 22 and the back packaging sheet 23 may be formed by bending and bonding one sheet, or two or more sheets may be bonded. The specific shape of the package 21 is not the gist of the present invention, but a bottom seal bag, a side seal bag, a three-side seal bag, a pillow bag, a square bottom bag, etc. In short, what is necessary is just to be fixed in a state of being sandwiched between sheets arranged on the front and back of the check valve 10, and various modifications can be made.

As described above, the packaging body 21 can be implemented in various forms for storing various contents, but a more specific form of this example is for storing food that generates gas by biological activity, and the gas. The following description will be made on the assumption that the packaging body 21 discharges the gas inside the packaging body 21 from the check valve 10 to the outside when the packaging body 21 has a higher pressure than the outside. In the description of this example, the forward flow refers to the flow of fluid in the direction of discharging the fluid inside the package 21 to the outside, and the reverse flow refers to the flow of fluid in the direction of flowing into the package 21 from the outside. As such, upstream and downstream terms are used with reference to forward flow.

(Check Valve 10: FIG. 1) First, members constituting the check valve 10 will be described. The check valve 10 includes a base sheet 11 including a front base sheet 12 and a back base sheet 13, and a valve sheet 14. All of these sheets can be composed of a flexible sheet made of a synthetic resin. In this example, the back base sheet 13 is made of a non-woven fabric, a woven fabric, a knitted fabric, a porous synthetic resin sheet, or the like. It is comprised by the sheet | seat which has. By using a sheet having air permeability in this way, the back base sheet 13 serves as a filter, and the internal fine powder particles flow out to the outside or enter the check valve 10. Can be prevented.

The front base sheet 12 is constituted by a single sheet of a synthetic resin film such as polyethylene, polypropylene, or polyamide, a laminated sheet of these, or a composite laminated sheet of these and other materials such as metal foil or paper.

The valve seat 14 can be made of the same material as the front base sheet 12, but is a sheet that constitutes a check valve, and therefore, a sheet that is thinner and more flexible than the front base sheet 12 is selected and used. It is preferable. For example, a polyethylene sheet having a thickness of 20 to 50 μm is suitable, but the present invention can be carried out by changing to another sheet used in a conventionally known sheet check valve.

In the drawings of the present application (particularly, cross-sectional views), in order to clarify the positional relationship of the sheets, the size and the interval in the thickness direction are drawn wider than actual. Actually, each sheet is usually thinner than 1 mm, and unless otherwise specified, the sheets are stacked and arranged in light contact with each other unless otherwise specified. Moreover, in FIGS. 1-4, the lower part of a figure is made into the upstream, and the upper part of the figure is drawn as the downstream.

(Arrangement of Check Valve 10 Seat) The two base sheets 11 (the front base sheet 12 and the back base sheet 13) are formed to have substantially the same length, and the valve seat 14 is formed to be shorter than the base sheet 11. ing. The valve seat 14 is disposed on the downstream side of the two base sheets 11 (the front base sheet 12 and the back base sheet 13), and is not disposed on the upstream side.

The front base sheet 12, the back base sheet 13, and the valve sheet 14 are overlapped in the front and back direction (thickness direction), and both sides are bonded by side seals 35. A flow path whose left and right sides are defined by the side seal 35 is a valve passage 33.

The valve seat 14 is bonded to the back base sheet 13 by a valve seal 36 on the upstream side. The valve seal 36 connects the left and right side seals 35 to each other. The valve seal 36 does not bond the valve seat 14 and the front base sheet 12, and in the forward flow, the fluid enters the valve passage 33 from the upstream upstream port 31, and the front base sheet 12 and the back base sheet 13. Between the front base sheet 12 and the valve seat 14 on the downstream side of the valve seal 36, and flows out from the downstream port 32.

In this example, since the back base sheet 13 is composed of a porous sheet that functions as a filter, the upstream side portion of the back base sheet 13 relative to the valve seal 36 is the upstream port 31, and the downstream side portion is the downstream port. 32. In the case where the back base sheet 13 is constituted by a sealing sheet such as a synthetic resin sheet, a space between the front base sheet 12 and the back base sheet 13 or the front base sheet 12 or the back base sheet 13 is provided. The opening can be an upstream port 31 and a downstream port 32.

The upstream end portions of the front base sheet 12 and the back base sheet 13 are bonded to each other by an upstream seal 37. The upstream seal 37 connects the left and right side seals 35 (upstream ends of the side seals 35).
The downstream ends of the front base sheet 12 and the back base sheet 13 are bonded to each other by a downstream seal 38. The downstream seal 38 connects the left and right side seals 35 (the downstream ends of the side seals 35).

In this example, the valve seat 14 is formed with a slit 17 on the downstream side of the valve seal 36 so as to cross the valve passage 33. The fluid that has entered between the front base sheet 12 and the valve seat 14 from the upstream passes through the slit 17 and flows out from the downstream port 32 of the back base sheet 13. The valve seat 14 is separated into a valve body seat 15 and a downstream valve seat 16 by the slit 17.

The valve body sheet 15 has an upstream end bonded to the back base sheet 13 by a valve seal 36 and a downstream end defined by the slit 17, and is not bonded to the front base sheet 12 and the back base sheet 13. As a result, when the pressure of the fluid from the upstream is high, the valve body sheet 15 is separated from the front base sheet 12, the valve is opened, and flows out from the slit 17 through the downstream port 32. When the fluid from the outside tries to flow backward, the valve body sheet 15 and the front base sheet 12 come into close contact with each other, and the valve is closed to prevent the fluid from flowing into the package body 21.

An upstream end of the downstream valve seat 16 is bonded to the front base sheet 12 and the back base sheet 13 by a downstream seal 38. Without providing the downstream valve seat 16, the fluid may flow out to the downstream port 32 from between the valve body sheet 15 and the downstream seal 38.

For the above bonding, heat sealing is preferably used, but bonding with an adhesive can also be performed. When performing heat sealing, adhesion prevention means such as application of heat-resistant ink 18 to the front base sheet 12 is performed so that the valve sheet 14 and the front base sheet 12 are not adhered by the valve seal 36. Is desirable. As shown in FIG. 1B, the heat-resistant ink 18 is preferably applied around the valve seal 36, and more preferably, it is applied to the vicinity of the upstream end as shown in FIG. 1C. To.

Moreover, the introduction recessed part as shown by patent document 2 can also be formed in the table | surface base sheet 12 of the valve seal 36 and valve seal 36 vicinity. The introduction concave portion is deformed by pressure or heat in the thickness direction of the seat, and by forming irregularities in the valve passage 33, inflow from the upstream side to the downstream side from the valve seal 36 is promoted.

(First stage 71: FIG. 2) Hereinafter, the manufacturing process of the package 21 provided with the check valve 10 will be described. The bag manufactured in this embodiment is a pillow bag having gussets on the side and bottom as shown in FIGS. 8 and 9. In the following description, the steps related to the mounting of the check valve 10 are described. Detailed description will be omitted for the same steps as the steps that are mainly described and manufactured by a general bag making machine.

First, as a first manufacturing process by the first stage 71, the check valve 10 is inserted between the end sides of the front packaging sheet 22 and the back packaging sheet 23 constituting the packaging body 21. The front wrapping sheet 22 and the back wrapping sheet 23 may be formed by folding a single web on the front and back and stacking two separate webs. The front wrapping sheet 22 and the back wrapping sheet 23 are made of a single sheet of a synthetic resin film such as polyethylene, polypropylene, or polyamide, a laminated sheet of these, or a composite laminated sheet of these and other materials such as metal foil or paper. Composed.

In the mass production process, when the front wrapping sheet 22 and the back wrapping sheet 23 are stacked and sent in the longitudinal direction of the web, the front wrapping sheet 22 and the back wrapping sheet 23 are reversed in the direction perpendicular to the longitudinal direction. The stop valve 10 is inserted. The check valve 10 is inserted such that its upstream side comes out of the packaging body 21 and its downstream side comes out of the packaging body 21. More specifically, the valve seal 36 is positioned in the vicinity of the end portions of the front packaging sheet 22 and the back packaging sheet 23, and the downstream side of the valve seal 36 is outside the front packaging sheet 22 and the back packaging sheet 23. Deploy.

The front packaging sheet 22 and the upstream side of the front base sheet 12 can be stopped by a temporary fixing seal 40. The temporary seal 40 can be heat sealed or bonded with an adhesive. By making the check valve 10 follow the front packaging sheet 22 by the temporary fixing seal 40, the shape of the check valve 10 can be stabilized during the manufacturing process or during use. This temporary fixing seal 40 is preferably applied at the position of the side seal 35 or the upstream seal 37 so as not to hinder the operation of the check valve 10.

(Second stage 72: FIG. 3) Next, as a second manufacturing process by the second stage 72, the end portions of the front packaging sheet 22 and the back packaging sheet 23 are bonded together with a transverse seal 41, so that The pasting part 24 is formed. This bonding can also be performed by heat sealing or bonding with an adhesive. At that time, at the portion where the check valve 10 is inserted, the front packaging sheet 22 and the front foundation sheet 12 are adhered, and the back packaging sheet 23 and the rear foundation sheet 13 are adhered. At that time, the cross seal 41 and the valve seal 36 are bonded at the same position or at least partially overlapped.

At that time, it is desirable to form the diving port 27. The entry port 27 is provided so that the fluid from the package 21 can be smoothly introduced into the check valve 10, and the transverse seal 41 is recessed downstream. More specifically, the side of the inner side of the package 21 in the transverse seal 41 is recessed downstream so that the fluid naturally gathers from the entry port 27 toward the check valve 10. is there.

As shown in FIG. 3C, a plurality of transverse seals 41 may be formed like a first transverse seal 42 and a second transverse seal 43. At this time, the diving port 27 may be formed by curving the first transverse seal 42 on the upstream side, or may be in a state of being missing without providing a part of the first transverse seal 42.

(Third stage 73, fourth stage 74: FIGS. 4, 5, and 6A) Next, as a third manufacturing process by the third stage 73, the front packaging sheet 22 and the back packaging sheet 23 are opened. At the same time, the back pasting portion 24 in which the ends are bonded together is bent and started up. And the dent 50 is formed with respect to the back | pasting pasting part 24 which stood up. The dent 50 is formed at a portion where the check valve 10 is inserted, and is performed at a position including at least the valve seal 36. More preferably, it forms in the valve seal 36 and the front base sheet 12 and the back base sheet 13 of the upstream side. This dent 50 may be performed at only one place as shown in FIG. 4 (A), or may be carried out at a plurality of places as shown in FIG. 4 (C). Further, the shape can be appropriately selected, such as a streak shape or a spot shape, but it preferably extends along the flow direction of the flow path rather than crossing the flow path.

As shown in FIG. 5, it is desirable that the dent 50 is formed twice, that is, the first dent 51 by the third stage 73 and the second dent 52 by the fourth stage 74, but only once. Well, it can be formed three or more times as necessary.

This processing can be performed by the dent forming device 66. The dent forming device 66 includes a third stage 73 that forms the first dent 51 by denting the front and back packaging sheets 22 and 23 sandwiching the check valve 10 on either the front or back side. And a fourth stage 74 that forms a second dent 52 by being recessed on either the front or back side after the first dent 51 is formed.

The third stage 73 and the fourth stage 74 include a male mold 67 and a receiving mold 68, respectively. The male mold 67 is a mold having protrusions for recessing the front packaging sheet 22 and the back packaging sheet 23 with the check valve 10 in between, and adds residual heat to a relatively low temperature (less than 50 to 100 degrees). It is desirable to keep it. The receiving mold 68 is a mold that receives the protrusions of the male mold 67, and the front surface of the receiving mold 68 may be left exposed, but may be covered with an elastic sheet such as silicon rubber or a resin film. preferable. In the third stage 73 and the fourth stage 74, the unevenness is formed at opposite positions across the sheet.

Thus, by pressing the front packaging sheet 22 and the back packaging sheet 23 sandwiching the check valve 10 with a mold having irregularities, these are deformed in the thickness direction, and irregularities are formed on these sheets. Thus, the fluid inside the package 21 is smoothly introduced into the valve passage 33. In particular, the heat seals of the front wrapping sheet 22 and the back wrapping sheet 23 are formed to be hard and thick, but due to this deformation, the material is squeezed and the fluid easily enters the valve passage 33.

The first dent 51 and the second dent 52 are made at positions where at least part of the first dent 51 overlaps. In this example, the second dent 52 is in a slightly wider range than the first dent 51. Is formed. After the second dent 52 is formed, the first dent 51 disappears in appearance. However, it is also possible to form the first dent 51 and the second dent 52 at a shifted position.

(Fifth Stage 75: FIGS. 6B and 7) Next, as a fifth manufacturing process by the fifth stage 75, the back pasting portion 24 is tilted and the bottom seal 44 of the package 21 is sealed. . Accordingly, the check valve 10 is attached to the package 21 in a state where the check valve 10 is folded in two from the fold 28. Even in the folded state in this way, since the downstream side of the valve seal 36 including the valve seat 14 is outside the fold 28, the check valve action is not adversely affected. Further, even in the state of being folded in half, the fluid is satisfactorily introduced into the valve passage 33 by the diving port 27 and the dent 50.

In addition, as shown in FIG. 8, in order to make a bottom part wide in a boat bottom shape, the diagonal seal | sticker 45 can also be formed according to a regular method. At this time, it is also preferable to form the point seal 46 in the middle of the oblique seal 45. When the contents are put into the packaging body 21 and the packaging body 21 is formed into a three-dimensional shape, wrinkles are generated from the point seal 46 toward the attachment portion of the check valve 10. By this wrinkle, the check valve 10 is slightly lifted from the front packaging sheet 22 and the back packaging sheet 23, and the action of the check valve is more reliably exhibited.

The package 21 is completed by the above steps, and the package 21 is used in a three-dimensional bag shape as shown in FIG. At that time, the check valve 10 is arranged near the bottom of the bag, but the arrangement is free, and it may be arranged at the top of the bag or at the bottom of the bag.

The present invention can be implemented with various modifications. For example, a step of forming the auxiliary dent 53 may be added between the second stage 72 and the third stage 73. The auxiliary dent 53 is narrower than the first dent 51 and protrudes from the transverse seal 41 toward the upstream entry port 27, and promotes the introduction of fluid into the entry port 27.

The check valve 10 can be implemented with various modifications. For example, as shown in FIG. 12, the check valve 10 may be implemented without providing the downstream valve seat 16, the upstream seal 37, and the downstream seal 38. In this case, both the front base sheet 12 and the back base sheet 13 are suitable for implementation as non-breathable sheets, and the check valve 10 is formed into a cylindrical shape by both sheets.

Moreover, as shown in FIG. 13, it can implement as what opens and closes a valve | bulb by providing two valve seats 14 facing each other and the two valve seats 14 approaching / separating each other.
The formation of the dent is performed after the back-pasted portion 24 is bent and raised from the front and back packaging sheets 22 and 23, but before the back-pasted portion 24 is folded from the front and back packaging sheets 22 and 23. You can also.

DESCRIPTION OF SYMBOLS 10 Check valve 11 Base sheet 12 Front base sheet 13 Back base sheet 14 Valve sheet 15 Valve body sheet 16 Downstream valve sheet 21 Packaging body 22 Front packaging sheet 23 Back packaging sheet 24 Back sticking part 27 Dive port 36 Valve seal 41 Crossing seal 50 dent 51 first dent 52 second dent

Claims (8)

A seat check valve for controlling the fluid, and a package to which the check valve is attached;
The check valve includes an upstream port and a downstream port, and opens from the downstream port to allow a forward flow that flows from the upstream port into the valve passage in the check valve and flows out from the downstream port. It is switched to a closed state that stops the reverse flow that flows into the valve passage and flows out from the upstream port,
The package includes a front packaging sheet disposed on the front side of the check valve, and a back packaging sheet disposed on the back side of the check valve,
With the front and back sides of the check valve sandwiched between the front and back packaging sheets, the check valve is attached to the package.
Either one of the upstream port and the downstream port is disposed inside the package, and the other of the upstream port and the downstream port is disposed outside the package,
In the package with a check valve, the check valve is a transverse seal between the upstream port and the downstream port and across the valve passage, and is bonded to the front package sheet and the back package sheet. ,
At a position including at least the transverse seal, a dent is formed for the front packaging sheet, the back packaging sheet, and the check valve,
The package is obtained by deforming the front packaging sheet, the back packaging sheet, and the check valve into at least one of the front and back surfaces. The check valve includes a plurality of base sheets that define the valve passage by being disposed facing the front and back, and at least one valve body sheet disposed between the plurality of base sheets. And
The valve body seat, the upstream side is provided with a glued valve seal against the front and back one of the base sheet, it is possible to downstream movement in the thickness direction, the closed and the open state by the movement The valve state is switched,
The package according to claim 1, wherein the transverse seal and the valve seal are formed by the same adhesion, or at least a part of them is adhered at an overlapping position. . The transverse seal has a diving opening in a part thereof,
In the diving port, an upstream portion of the transverse seal is recessed downstream, or a part of the transverse seal is not provided so that the width in the upstream and downstream directions of the transverse seal is different. Smaller than the width of the transverse seal of the portion of
The packaging body according to claim 1 , wherein the forward flow fluid is easily introduced into the valve passage from the diving opening. The package according to claim 3 , wherein the dent is a line-shaped dent, and the line-shaped dent is formed in a direction crossing the valve passage. In the apparatus for manufacturing the package according to claim 1,
A transverse adhesive device that forms the transverse seal by adhering the front packaging sheet and the back packaging sheet across the front and back of the check valve;
A dent forming device that forms dents with respect to the front packaging sheet, the back wrapping sheet, and the check valve at a position including the crossed seal that has been bonded,
The dent forming device has a male mold having a convex portion at a position facing the front packaging sheet, the back packaging sheet, and the check valve, and a receiving mold for receiving the male mold,
The package manufacturing apparatus according to claim 1, wherein the dent is formed by bringing the male mold and the receiving mold close to each other. The dent forming device includes a front stage that forms a first dent by recessing the front wrapping sheet, the back wrapping sheet, and the check valve on either the front or back side, and the first dent is And a rear stage that is recessed on either the front or back side to form a second dent after being formed,
Each of the front stage and the rear stage includes a male mold and a receiving mold,
At least a part of the first dent and the second dent is made at a position where they overlap each other,
The male mold and the receiving mold of the rear stage are opposite to the male mold and the receiving mold of the preceding stage with the front packaging sheet, the back packaging sheet, and the check valve interposed therebetween. 6. The packaging body manufacturing apparatus according to claim 5 , wherein the packaging body manufacturing apparatus is arranged. In the method of manufacturing the package according to claim 1,
The check valve includes a base sheet that defines the valve passage by being opposed to the front and back, and at least one valve body sheet disposed between the plurality of base sheets. And
Sandwiching the check valve between the front packaging sheet and the back packaging sheet, and temporarily fixing the check valve to at least one of the front packaging sheet and the back packaging sheet;
Sandwiching the front and back of the check valve, forming a transverse seal for adhering the front packaging sheet and the back packaging sheet;
At the position including the transverse seal, a concave portion is formed with respect to the front packaging sheet, the back packaging sheet, and the valve body sheet using a male mold having a convex section and a receiving mold that receives the male mold. A method for producing a package, comprising a step of forming an introduction dent. Adhesion of the transverse seal is adhesion by heat sealing,
The method for manufacturing a package according to claim 7, wherein the dent is formed on a transverse seal after the heat seal is adhered.

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