JP2002080072A - Sealing bag for heat-cooking by microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing bag for heat-cooking by a microwave oven in which no liquid inside leaks when a heat seal of a protruded portion inwardly bent in a V-shape by the rise of the internal pressure during the heating is peeled to release steam. SOLUTION: Side seals 3 and 3 are provided on both side edges of a lower surface part 1 and an upper surface part 2, an opening 4 is made in one end and an end seal 5 is provided on the other end, a film is expanded outside the bag and overlaps in a joining manner, a film joining part 6 is divided at an expansion end, and a high-pressure steam releasing means 7 is provided in the film joining part 6. In a shape of remaining heat-sealed band parts 8 and 8 of the film joining part 6, riser base ends a and a of the film joining part in an inner edge of the heat-sealed band parts are connected to parts b and b in the vicinity of a starting end for forming the high-pressure steam releasing means via curves 9 and 9, the expansion side is heat-sealed by these curves, a work S1 is accommodated from the opening 4, and a top seal 10 is provided thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for heating and cooking various products such as frozen foods contained therein, in which a part of a heat seal portion is opened due to an increase in internal pressure during heating, which causes rupture, deformation and bag of the bag. And more particularly to a sealed bag for heating and cooking which can prevent the contents from being spilled due to the rupture of air.
The invention of No. 5583 relates to an improved microwave cooking device in which a heat seal of a protrusion bent inwardly in a V-shape due to an increase in internal pressure at the time of heating is peeled off so that a liquid inside does not leak when steam is released. Related to sealed bags.

[0002]

2. Description of the Related Art When heating and cooking various products such as frozen foods stored therein, a part of a heat seal portion is opened due to an increase in internal pressure during heating, and the contents of the container due to rupture and deformation of the container and rupture of the container are increased. Japanese Patent Publication No. 8-25883 (Patent No. 2127080) discloses a basic and earliest application as a sealed container for heating and cooking a microwave oven that can prevent spills. The invention of Japanese Patent Publication No. Hei 4-40005 (Patent No. 1754644) is exactly the same invention and is considered to have been incorrectly registered in violation of the prohibition of double patent. The feasibility of the invention of Japanese Patent No. 2127080 can be easily understood in comparison with the invention of Japanese Patent Application Laid-Open No. 58-82849. JP-A-58-82849 discloses that the heat seal formed so as to protrude inward of the container actually starts peeling from the protruding portion due to the internal pressure and the outer edge of the heat seal It is not an unfinished invention in which there is a possibility that the projecting portion is opened and the contents are scattered when the internal pressure is further increased and the rupture or in a state close to it is ruptured, and the contents cannot be opened because the inner pressure does not reach.
The invention of Japanese Patent No. 2127080 discloses a sealed container having a peelable heat seal band, wherein at least one portion of the heat seal band is formed so as to protrude inward of the container, and The portion of the outer edge of the heat seal band corresponding to the position closest to the inner side of the container is formed more inward of the container than the line connecting the protrusion forming start ends at the inner edge of the heat seal band. It is characterized by the fact that, during heating, the internal pressure rises so that the peeling starts from the protruding portion and reaches the outer edge of the heat seal to release high-pressure steam out of the container. This is because it is a completed invention that can prevent the contents from being spilled due to the rupture and deformation of the container and the rupture of the container. Thus, the second patent
Understanding the feasibility of the invention of 127080, Japanese Utility Model Application Laid-Open No. 6-25161, Japanese Patent Application Laid-Open No. 9-150864, Japanese Patent Application Laid-Open No. 10-95471, and Japanese Patent Application Laid-Open No. 10-101154.
JP-A-10-310180, JP-A-11-291
No. 81 and JP-A-2000-185777 show that the intended purpose cannot be achieved. In other words, this is a technique in which the portion that the inventor claims that a part of the heat seal portion opens due to an increase in internal pressure during heating does not actually open, and rupture of the container is inevitable. As long as the literature is trusted, Utility Model Registration No. 2525918 states that the heat seal portion melts from the inner edge due to a rise in temperature during heating, the entire circumference of the heat seal portion peels off due to the rise in internal pressure, and one portion of the heat seal portion Because the part is provided with the heat seal width narrower than the outer edge, it is said that the vapor does not escape from here and the container does not burst, but in fact, it is considered that this is a technology that the container rupture cannot be avoided. You. Utility Model Registration No. 3048391, Utility Model Registration No. 304
No. 8825 is a technique similar to that of Utility Model Registration No. 2525918, and it is considered that in fact, the rupture of the container is inevitable. JP-A-4-10079, JP-A-8-2
No. 76966 is merely a disclosure of the same invention as the invention of Japanese Patent Publication No. Hei 8-25583. Japanese Patent Application Laid-Open No. 9-290871 conflicts with the invention of Japanese Patent Publication No. Hei 8-25583, but is different only in that a guard seal portion is provided. Patent No. 212708
Japanese Patent Application Laid-Open Nos. 2000-191056 and 10-114376 disclose inventions that can achieve the intended purpose as a detour invention for the invention of No. 0.

[0003]

As described above, Japanese Patent Publication No. Hei 8-25583 (Japanese Patent No. 2127080) is understood to be the most effective and practically effective technique, but the problem remains. . That is, the effect of preventing the contents from being spilled due to the rupture of the container has not been achieved in the pillow packaging bag shown in FIG. 6 of the publication.
That is, the frozen food or the like contained in the pillow packaging bag shown in FIG. 6 is a food containing a large amount of liquid so that the liquid level comes to a level close to half the thickness of the package when heated. Sometimes, even if the bag does not burst, it is inevitable that a large amount of liquid will spill out from the opening of the projection. On the other hand, Japanese Patent Publication No. 8-25583 discloses a bag-shaped closed container as shown in FIG.
No description is given nor suggests an embodiment in which only the pillow packaging bag shown in FIG. Such a problem is described in Japanese Patent Application Laid-Open No.
The same applies to 00-191056. Also, in the invention of Japanese Patent Application Laid-Open No. 2000-191056, when the bag is taken out of the microwave oven, since the air vent slit is closed, outside air cannot flow into the bag, the inside of the bag becomes negative pressure and the bag becomes squashed. There is a problem that it is difficult to open the package and remove the package. Japanese Patent Application Laid-Open No. H10-114376 discloses a stand pouch in which a vapor sustained release member provided with a printing layer of a weakly heated adhesive ink as an easily peelable portion is provided on an upper portion. It is considered that the opening of the protrusion formed in a part of the slab allows the vapor to smoothly escape, and the liquid does not spill out. However, at the stage where the rise in internal pressure during heating is low, the printing layer of the weakly heated adhesive ink peels off, so that the steam does not reach the high pressure required for cooking and the high-pressure steam is kept inside for a necessary time. There is no preference for insufficient heating of frozen foods. In addition, since the printing layer of the weakly heated adhesive ink is provided, the printing layer of the weakly heated adhesive ink is peeled off only when a relatively weak external pressure is applied due to dropping during carrying or the like. There is a problem that the bag making cost is higher than the bag making of 25583.

[0004] In view of the above points, the inventor of the present invention prototyped several different types of bags, contained water until the eighth minute, heat-sealed and sealed, and heated with a microwave oven. (1) The steam is better than the high-pressure steam escape means projecting in a V-shape to the inside of the bag, which is a heat seal portion provided to allow the steam to escape when the steam is held in the bag as necessary and sufficiently high and reaches the required high pressure. (2) whether the juice in the bag does not leak when the steam is released,
(3) A test was performed to determine whether there was a risk of the bag falling over.

First, as shown in FIG. 4, a pillow wrapping three-side seal bag P3 having a backing seal at the center of the upper surface was made (unknown). This bag P3 is disclosed in Japanese Unexamined Patent Application Publication No. 11-29181.
This is an improvement of the three-sided pillow wrapping bag shown in FIG. The improvement is achieved by replacing the high-pressure steam release means 24 projecting in a V-shape toward the inside of the bag, which is the heat sealing portion, with the invention of Japanese Patent Publication No. 8-25883. As a result of heating in a microwave oven, in many cases, the bag expands as the internal pressure increases due to the heating, but the backing seal 23 at the center of the bag upper surface remains lying down sideways, and the high-pressure steam is discharged into the bag. The high pressure steam escape means 24 provided on the backing seal after opening is not fully opened, but the intersection of the backing seal 23 and the end seal 25 is opened, and steam escapes from here.
A lot of juice in the bag leaked out. Even if the backing seal 23 coming to the center of the upper surface rises vertically with the rise of the internal pressure during heating, when the steam is retained in the bag as necessary and sufficiently and rises to the required high pressure, the high pressure projecting inwardly The vapor release means 24 opens to allow the vapor to escape. Then, when the heating was stopped and the bag was taken out of the microwave oven, the inside of the bag became negative pressure, the bag was crushed, and the juice in the bag sometimes leaked from the opening.

Second, as shown in FIG. 5, a four-sided seal bag P4 having a palm joint portion 26 on the upper surface of the bag was made (unknown). This bag P4 is an improvement of the four-sided seal bag shown in FIG. 3 (c) of Japanese Patent Application Laid-Open No. H10-101154, in which the palm joint portion 26 is provided on the upper surface of the bag. The improvement is achieved by replacing the high-pressure steam release means 27 projecting in a V-shape toward the inside of the bag, which is the heat sealing portion, with the invention of Japanese Patent Publication No. 8-25883. As a result of heating in a microwave oven, when the joint joint 26 coming to the center of the upper surface rises vertically as the internal pressure rises during heating, when the steam is retained in the bag as necessary and sufficient and rises to the required high pressure, The high-pressure steam release means 27 projecting toward the opening opened, and the steam escaped. However, the bag may swell as the internal pressure rises during heating, but the backing seal at the center of the top of the bag may still be lying sideways. At the time of fastening, the intersection of the joint joint 27 and the side seal 28 was opened, and the steam escaped from here, and the juice in the bag leaked out.

Third, as shown in FIG. 6, a stand pouch pouch P5 having a palm joint portion 29 at the top of the pouch was made (unknown). This bag is an improvement of the stand pouch bag shown in FIG. 1 of Japanese Patent Application Laid-Open No. 2000-185777, which has a joint at the top of the bag. The improvement is achieved by replacing the high-pressure steam release means projecting in a V-shape toward the inside of the bag, which is the heat seal portion, with the invention of Japanese Patent Publication No. 8-25883. As a result of heating in a microwave oven, at the time of heating, when the inner pressure rises, the joint joint 29 which comes to the center of the upper surface does not rise and remains collapsed, and the steam is kept in the bag as necessary and sufficient, and rises to the required high pressure Since the high-pressure vapor release means 30 projecting in a V-shape inwardly of the bag provided at the joint part 29 peels off but is not opened but closed, the internal pressure increases, and Side seal 31
The opening of the intersection opened, and steam escaped from here, and the juice in the bag leaked out. It was also found that there was no fear that the bag would fall.

The invention of the present application is a prototype of the above-mentioned three types of bags, and a heating test is repeated to ascertain a problem, and the invention is repeatedly devised. As a means for releasing the steam at the time of ascending, a technique disclosed in Japanese Patent Publication No. 8-25883, that is, a high-pressure steam releasing means projecting in a V-shape toward the inside of the bag which is the heat-sealing portion, is adopted. A space where the opening for releasing steam at the time of high-pressure expansion by heating remains round and open can be formed at a high position on the top of the bag, or at the top of the side of the bag,
In addition, it is an object of the present invention to provide a heat-sealing sealed bag that can maintain this space not only at the time of high-pressure expansion by heating but also after being taken out of a microwave oven, and does not leak liquid juice in the bag. In the present invention, when heating and cooking various products such as frozen foods housed therein, a part of the heat seal portion is opened due to an increase in internal pressure during heating, and the contents are spilled due to bursting, deformation and bursting of the bag. Heating-sealing bag that can prevent
The invention of No. 583 relates to an improved microwave cooking device in which a heat seal at a protrusion bent inwardly in a V-shape due to an increase in internal pressure at the time of heating is peeled off so that a liquid inside does not leak when steam is released. It is intended to provide a sealed bag for use.

[0009]

According to a first aspect of the present invention, there is provided a bag provided with a peelable heat seal band at a portion where the films overlap in a palm shape, wherein one portion of the heat seal band is formed inside the bag. High-pressure steam release means protruding in a V-shape in the direction, and the outer edge of the heat seal band corresponding to the high-pressure vapor release means and located most inwardly of the bag is the inner edge of the heat seal band. The heat seal of the high-pressure steam release means is peeled off due to a rise in the vapor pressure in the bag during heating, and the steam is released by being located inward of the bag from the line connecting the high-pressure steam release means forming start end of the high-pressure steam release means. In the sealed bag for microwave cooking having a configuration, the sealed bag has an opening for accommodating a packaged object at one end, with both side edges of a lower surface portion and an upper surface portion being provided with side seals in a palm shape, and the other end thereof. Closed in a loop An end seal is provided in a closed or palm shape, and the film constituting the top surface located on the shoulder near the end seal or the opening on the upper surface protrudes outward from the bag and overlaps in a palm shape. There is a film joint portion which is divided at the outgoing end, and a heat seal portion serving as the high-pressure vapor release means is provided at a longitudinal center portion of the film joint portion, and the remaining heat seal band of the film joint portion is provided. The shape of the portion is such that the rising base end of the film joint portion at the inner edge of the heat sealing band portion and the vicinity of the high pressure vapor release means forming start end are connected by a straight line or a curve, and the packaged object is accommodated from the opening. The opening of the film is heat-sealed, and the film joint portion is heat-sealed from the protrusion at the inner end of the high-pressure steam escape means due to the expansion of both sides due to the increase in vapor pressure in the bag during heating. Peeling to escape steam, but also to provide a microwave heating cooking sealed bag, characterized in that it is configured to maintain the expanded state, the open state after venting of the vapors. A second invention of the present application is a bag provided with a heat-sealable band that can be peeled off at a portion where the films overlap in a palm-shape manner, wherein one part of the heat-sealable band projects in a V-shape toward the inside of the bag. The relief means is formed, and the outer edge of the heat seal band corresponding to the high-pressure vapor release means and the portion located most inward of the bag is formed at the inner edge of the heat seal band. A microwave oven cooking seal, which is located more inward of the bag than the line connecting the ends and has a configuration in which the heat seal of the high-pressure steam release means peels off and releases the steam due to an increase in the vapor pressure in the bag during heating. In the bag, the closed bag has a side seal in which the side edges of the pair of side portions are closed together in a palm shape, has a self-supporting means at a lower portion, has an opening at an upper end for accommodating a packaged object, and has an upper portion at one side portion. Located in There is a film apron part where the film constituting the side part protrudes outward from the bag and overlaps in a palm-shape manner and is divided at the protruding end, and the high-pressure vapor release means is provided at the longitudinal center part of the film apron part. A certain heat seal portion is provided, and the shape of the remaining heat seal band portion of the film seam portion is the rising base end of the film seam portion at the inner edge of the heat seal band portion and the start end of the high-pressure vapor release means formation start end. The vicinity is connected by a straight line or a curve, the object to be packaged is accommodated from the opening and the opening is heat-sealed, and the film joint portion expands on both sides due to an increase in the vapor pressure in the bag during heating. The heat seal peels off from the projection at the inner end of the high-pressure steam release means to release the steam, and is configured to maintain the expanded state and the open state even after releasing the steam. There is provided a microwave cooking seal bag to be.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 (a), 1 (b) and 2 show a sealed bag for heating and cooking a microwave oven according to an embodiment of the first invention of the present application.
This will be described with reference to (a) and (b). As shown in FIG. 1 (a), the sealed bag for heating and cooking a microwave oven according to this embodiment is provided with side seals 3 and 3 in which both side edges of a lower surface 1 and an upper surface 2 can be peeled off in a palm-shape manner. One end has an opening 4 for accommodating an article to be packaged, and the other end is provided with an end seal 5 that can be peeled off in a palm shape (may be closed with a loop instead of the end seal 5). At the position of the shoulder near the end seal, there is a film joint portion 6 in which the film constituting the upper surface portion 2 projects outside the bag and overlaps in a palm-shape manner and is divided at the projecting end. A high-pressure steam release means 7 which is a peelable heat seal portion protruding in a V-shape into the bag is provided at the center in the length direction of the film joint portion 6 and may be provided near the opening. The remaining heat-seal strips 8, 8 of the joint part 6 The shape is such that a rising base end a, a of the film joint portion at the inner edge of the heat seal band portion and b, b near the start end of forming the high-pressure vapor release means are protruded outward from the bag (even a straight line). Good), and the overhanging side of this curve is heat-sealed. As shown in FIG. 1 (b), a packaged object S1 such as frozen food or shark fin soup is stored through the opening 4. The top seal 10 is applied to the edge of the opening 4. Notches 11, 11 are provided near the opening 4 side of the film joint portion 6 of the side seals 3, 3 for opening after heating and cooking.

Therefore, the sealed bag P1 for microwave cooking shown in FIGS. 1 (a) and 1 (b) is a four-sided sealed packaging bag having a peelable heat seal band. High-pressure steam release means 7 protruding in a V-shape into the bag
And the outermost edge of the heat seal strip corresponding to the high-pressure steam release means 7 and located at the innermost side of the bag is the high-pressure steam release means formation start end located at the inner edge of the heat seal strip. The structure is such that the heat seal of the high-pressure steam releasing means is peeled off due to an increase in the vapor pressure in the bag at the time of heating and the vapor is released. The invention according to the invention is improved so that the internal liquid does not leak when the heat seal of the protrusion bent inwardly in a V-shape peels off due to the rise of the internal pressure during heating and vapor escapes.

As shown in FIGS. 1 (a) and 1 (b), a packaged object S1 such as frozen food or shark fin soup is accommodated through an opening 4, and a top seal 10 is applied to the edge of the opening 4. The cooking bag P1 is placed in a microwave oven and cooked. By heating, the steam in the bag becomes high temperature and high pressure and expands into a pan. Then, as shown in FIG. 2 (a), the bag body portion formed by the lower surface portion 1 and the upper surface portion 2 expands so that the vertical cross section becomes circular, and the heat seal band portion 8, When the space defined by the curves 9, 9 at the inner edge of 8 expands, the high-pressure steam escapes in which the force forming the V-shape protrudes inward into the bag as the films constituting the film apposition portion 6 are separated from each other. As shown in FIG. 2B, the heat seal is peeled off from the inner end of the high-pressure vapor release means 7 at the maximum concentration at the inner end of the means 7. When the high-pressure steam release means 7 is opened, the high-pressure steam escapes and the rupture of the bag can be avoided. Therefore, the contents can be prevented from being spilled due to the rupture of the bag. The pressure in the bag rises until steam generation is balanced with steam escape,
The opening of the heat seal of the high-pressure steam release means 7 is made larger by continuously peeling from the inner end, and the size of the opening is 3 mmφ.
At about 4 mmφ, the amount of generated steam and the escape amount of high-pressure steam are substantially equilibrated, the internal pressure stops rising, and the separation stops. The expansion of the space defined by the curves 9, 9 at the inner edges of the heat seal strip portions 8, 8 of the film joint portion 6 overlaps the expansion of the bag body portion formed by the lower surface portion 1 and the upper surface portion 2. ,
In addition, since the high-pressure steam release means 7 is not fully opened and a V-shaped flat portion remains, a space symmetrically rising on both sides of the high-pressure steam release means 7 is formed. 2A and 2B, the two sides of the central portion act as a lifting stress, and as shown in FIG. 2 (c), the triangular unwelded portion 7a on the outer edge of the high-pressure steam release means 7 is opened like a trumpet. For this reason, even if there is a large amount of liquid in the bag, the opening for releasing high-pressure steam is sufficiently large and secured at a high position, so that even if there is a large amount of liquid, it does not spill. When heating is stopped and taken out of the microwave oven, the inside of the bag becomes negative pressure.However, the opening for releasing high-pressure steam is sufficiently large. The outside air flows in each time, and the sealant film has a slight shape maintaining function by stretching, so that the bag is not crushed, so that the liquid juice in the bag does not leak from the opening.

Referring to FIGS. 3 (a), 3 (b) and 3 (c), a sealed microwave cooking bag according to an embodiment of the present invention will be described. As shown in FIGS. 3 (a) and 3 (b), the sealed bag for microwave cooking of this embodiment has a pair of side portions 12,
13 are provided with side seals 14, 14 in a palm-shape manner, having a self-supporting means 15 at a lower part, an opening 16 for accommodating an article to be packaged at an upper end, and located at an upper part of one side part 12. The film constituting the side portion 12 extends outwardly of the bag and is biased upward to overlap in a palm-shape manner. High pressure steam release means 18 which is a peelable heat seal portion protruding in a V-shape into the bag at the center.
And the shape of the remaining heat-sealing band portions 19, 19 of the film joint portion 17 is adjusted to the rising base ends a, a of the film joint portion 17 at the inner edge of the heat sealing band portion, and the high-pressure vapor releasing means. The vicinity b, b near the formation start end is connected by curves (which may be straight lines) 20, 20 protruding outward from the bag, and the overhanging side is heat-sealed from this curve, and FIG. As shown in FIG. 2), a packaged object S2 such as frozen food or shark fin soup is accommodated in the opening 16 at the upper end, and the edges of the opening 16 are heat-sealed 21 and 21. Notches 22, 22 for opening after heating and cooking are provided near the lower side of the film joint portion 17 of the side seals 14, 14.

Therefore, the sealed pouch P2 for microwave cooking shown in FIGS. 1 (a) and 1 (b) is also a stand pouch pack having a peelable heat seal band, and one of the heat seal bands is a container. High-pressure steam release means 18 projecting in a V-shape to the inside of the container, and the outermost edge of the heat seal band corresponding to the high-pressure steam release means 18 and located at the most inward direction of the container is heated. The heat seal of the high-pressure vapor release means is located at a position closer to the inside of the container than the line connecting the high-pressure vapor release means forming start end at the inner edge of the seal band, and the vapor pressure in the bag increases during heating. To escape the steam.
The invention of No. 5583 is improved so that a heat seal at a protrusion bent inwardly in a V-shape due to an increase in internal pressure at the time of heating is peeled off so that the internal liquid does not leak when steam is released.

As shown in FIGS. 3 (a) and 3 (c), a packaged product S2 such as frozen food or shark fin soup is accommodated through an opening 16, and a top seal 21 is applied to the edge of the opening 16. The cooking bag P2 is placed in a microwave oven and cooked. By heating, the steam in the bag becomes high temperature and high pressure and expands into a pan. Then, as shown in FIG. 3 (c), the bag body portion formed of the lower surface portion 12 and the upper surface portion 13 expands, and the curves 20 and 20 of the inner edges of the heat seal band portions 19 and 19 of the film joint portion 17 are formed. When the space defined by (1) expands, the force constituting the film joint portion 17 tends to separate from each other, and the force is maximized at the inner end of the high-pressure steam release means 18 that projects in a V-shape inside the bag. Then, the heat seal is peeled off from the inner end of the high-pressure steam releasing means 18. High-pressure steam release means 1
When the opening 8 opens, the high-pressure steam escapes and the bursting of the bag can be avoided. Therefore, the contents can be prevented from being spilled due to the rupture of the bag. The pressure in the bag rises until the generation of steam is balanced with the escape of steam and the high pressure steam escape means 18
When the opening of the heat seal of 3mmφ ~ 4mmφ is about 3mmφ
When the amount of generated steam and the amount of released high-pressure steam are substantially equilibrated, the internal pressure stops rising and the separation stops. The expansion of the space defined by the curves 20, 20 at the inner edges of the heat seal strip portions 19, 19 of the film joint portion 17 overlaps the expansion of the bag body portion formed by the lower surface portion 1 and the upper surface portion 2. In addition, since the high-pressure steam release means 7 does not fully open and a V-shaped flat portion remains,
A space is formed symmetrically on both sides of the high-pressure steam release means 7, and this acts as a stress for lifting both sides of the central portion of the two films constituting the film joint portion 17, and the high-pressure steam release. The triangular unwelded portion 18a of the outer edge of the means 18 is opened like a trumpet. For this reason,
Even if there is a large amount of liquid in the bag, the opening for releasing high-pressure steam is sufficiently large and secured at a high position. When heating is stopped and taken out of the microwave oven, the inside of the bag becomes negative pressure.However, the opening for releasing high-pressure steam is sufficiently large. Since the outside air flows in each time, the sealant film has a slight shape holding function by stretching, so that the bag does not collapse,
The juice in the bag does not leak from the opening.

Each of the sealed bags of the first invention and the second invention of the present application is composed of a laminated film, and the innermost sealant film is entirely made of heat-resistant linear polyethylene (LL).
DPE) and unstretched polypropylene (CPP), and the like, and high-pressure vapor release means 7 is formed by welding by heat sealing. The seal temperature and the seal pressure when forming the high-pressure vapor releasing means 7 of the film joint portion 6 and the remaining heat seal band portions 8, 8, the side seals 3, 3, the end seal 5, and the top seal 10 are uniform.
No material other than the innermost sealant film is partially processed on the surface of the portion corresponding to the high-pressure vapor release means 7 or another material is used on the opposing surface. or,
Neither low-temperature heat-sealing nor low-pressure heat-sealing for weakening the sealing strength is performed on the portion corresponding to the high-pressure vapor releasing means 7.

[0017]

According to the sealed bags for microwave cooking of the first and second aspects of the present invention, as a means for releasing steam when the steam is held in the bag as necessary and sufficiently high, the steam is released. No.-25583, a space in which the opening for releasing steam at the time of high-pressure expansion by heating remains round and open can be formed at a high position on the top surface of the bag or on the top of the side surface of the bag. Can be maintained not only at the time of high pressure expansion by heating but also after being taken out of the microwave oven, so that the juice in the bag does not leak, there is no risk of the bag falling over, and frozen food etc. When heating and cooking various commodities, a part of the heat seal portion is opened due to an increase in internal pressure during heating, so that the contents can be prevented from being ruptured and deformed and the contents from being spilled due to the rupture of the containers. According to the sealed bags for microwave cooking of the first and second inventions of the present application, since the technique of Japanese Patent Publication No. 8-25583 is adopted as a means for releasing steam, the innermost layer of the laminated film constituting the sealed bag Heat-resistant linear polyethylene (LLDPE) or unstretched polypropylene
(CPP), etc., which can be made of the same material and does not require any special processing, so the production cost is low, and there is no fear of bursting due to external pressure. Fastened, very high reliability as a bag for cooking.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view of a sealed microwave cooking bag according to an embodiment of the first invention of the present application, and FIG. 1 (b) stores an article to be packaged in the sealed microwave cooking bag. FIG. 4 is a perspective view showing a state in which the opening is heat-sealed.

FIG. 2 (a) is a side view showing an expanded state when the sealed microwave cooking bag containing the packaged item of FIG. 1 (b) is heated by a microwave oven, and FIG. An enlarged view of a main part for explaining that the heat seal of the high-pressure steam release means for releasing steam during high-pressure expansion is opened and an opening can be made, and (c) shows an electronically sealed microwave cooking bag containing an object to be packaged. FIG. 3 is a perspective view showing an expanded state when heated in a microwave.

FIG. 3 relates to an embodiment of the second invention of the present application,
(a) is a perspective view of a sealed microwave cooking bag, and (b) is a perspective view of the sealed microwave cooking bag when an object to be packaged is accommodated, the opening is heat-sealed, and the microwave is heated in the microwave. The perspective view which shows the state which expanded.

FIG. 4 is a perspective view of a pillow wrapping three-sided seal bag in which a backing seal is located at the center of the upper surface according to a first unknown product before the present inventors completed the present invention.

FIG. 5 is a perspective view of a four-side seal bag having a joint joint on the bag upper surface according to a second unknown prototype before the present inventors completed the present invention.

FIG. 6 is a perspective view of a stand pouch bag having a palm joint at an upper portion of a side portion according to a third unknown prototype before completion of the present invention by the present inventors.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower surface part, 2 ... Upper surface part, 3 ... Side seal, 4 ... Opening, 5 ... End seal, 6 ... Film joint part, 7 ... High-pressure vapor escape means , 8 ...
Heat seal band portion, 9: inner edge (curve) of heat seal band portion 8, S1: packaged object, 10: top seal, 11: notch, 12, 13, ... side surface portion,
14 ... side seal, 15 ... independent means, 16.
..Opening, 17 ... Film joint part, 18 ... High-pressure vapor release means, 19 ... Heat seal strip part, 20
... Inner edge (curve) of heat seal band portion 19, S2
··· Packaged objects, 21 ··· Top seal, 22 ··· Notch.

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[Procedure amendment]

[Submission date] November 2, 2000 (200.11.
2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Referring to FIGS. 3 (a), 3 (b) and 3 (c), a sealed microwave cooking bag according to an embodiment of the present invention will be described. As shown in FIGS. 3 (a) and 3 (b), the sealed bag for microwave cooking of this embodiment has a pair of side portions 12,
13 are provided with side seals 14, 14 in a palm-shape manner, having a self-supporting means 15 at a lower part, an opening 16 for accommodating an article to be packaged at an upper end, and located at an upper part of one side part 12. The film constituting the side portion 12 extends outwardly of the bag and is biased upward to overlap in a palm-shape manner. High pressure steam release means 18 which is a peelable heat seal portion protruding in a V-shape into the bag at the center.
And the shape of the remaining heat-sealing band portions 19, 19 of the film joint portion 17 is adjusted to the rising base ends a, a of the film joint portion 17 at the inner edge of the heat sealing band portion, and the high-pressure vapor releasing means. The vicinity b, b near the formation start end is connected by curves (which may be straight lines) 20, 20 protruding outward from the bag, and the overhanging side is heat-sealed from this curve, and FIG. As shown in the figure, a packaged object S2 such as frozen food or shark fin soup is accommodated in the opening 16 at the upper end, and the edge of the opening 16 is heat-sealed.
21 . Notches 22, 22 for opening after heating and cooking are provided near the lower side of the rising end of the film joint portion 17 of the side seals 14, 14.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

Therefore, the sealing bag P2 for microwave cooking shown in FIGS. 3 (a), 3 (b) and 3 (c) is also a stand pouch pack having a peelable heat seal band. One part is formed with a high-pressure steam release means 18 protruding in a V-shape toward the inside of the container, and the outer edge of the heat seal band corresponding to the high-pressure steam release means 18 and located at the most inward direction of the container. The portion is located on the inner side of the container with respect to the line connecting the high pressure vapor release means forming start end on the inner edge of the heat seal zone, and the heat of the high pressure vapor release means is increased by the increase of the vapor pressure in the bag during heating. The seal is peeled to allow steam to escape.
The invention of No. 25558 is improved so that the internal liquid does not leak when the heat seal at the protrusion bent inwardly in a V-shape peels off due to the rise of the internal pressure during heating and steam escapes.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

As shown in FIGS. 3 (a) and 3 (c), a packaged product S2 such as frozen food or shark fin soup is accommodated through an opening 16, and a top seal 21 is applied to the edge of the opening 16. The cooking bag P2 is placed in a microwave oven and cooked. By heating, the steam in the bag becomes high temperature and high pressure and expands into a pan. Then, as shown in FIG. 3 (c), the bag body portion formed of the side surface portion 12 and the side surface portion 13 expands, and the curves 20 and 20 of the inner edges of the heat seal band portions 19 and 19 of the film joint portion 17 are formed. When the space defined by (1) expands, the force constituting the film joint portion 17 tends to separate from each other, and the force is maximized at the inner end of the high-pressure steam release means 18 that projects in a V-shape inside the bag. Then, the heat seal is peeled off from the inner end of the high-pressure steam releasing means 18. High-pressure steam release means 1
When the opening 8 opens, the high-pressure steam escapes and the bursting of the bag can be avoided. Therefore, the contents can be prevented from being spilled due to the rupture of the bag. The pressure in the bag rises until the generation of steam is balanced with the escape of steam and the high pressure steam escape means 18
When the opening of the heat seal of 3mmφ ~ 4mmφ is about 3mmφ
When the amount of generated steam and the amount of released high-pressure steam are substantially equilibrated, the internal pressure stops rising and the separation stops. The expansion of the space defined by the curves 20, 20 at the inner edges of the heat-sealing strip portions 19, 19 of the film joint portion 17 is laminated on the expansion of the bag body portion formed by the side portions 12 and 13 , In addition, since the high-pressure steam release means 7 does not fully open and a V-shaped flat portion remains,
A space is formed symmetrically on both sides of the high-pressure steam release means 7, and this acts as a stress for lifting both sides of the central portion of the two films constituting the film joint portion 17, and the high-pressure steam release. The triangular unwelded portion 18a of the outer edge of the means 18 is opened like a trumpet. For this reason,
Even if there is a large amount of liquid in the bag, the opening for releasing high-pressure steam is sufficiently large and secured at a high position. When heating is stopped and taken out of the microwave oven, the inside of the bag becomes negative pressure.However, the opening for releasing high-pressure steam is sufficiently large. Since the outside air flows in each time, the sealant film has a slight shape holding function by stretching, so that the bag does not collapse,
The juice in the bag does not leak from the opening.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Each of the sealed bags of the first invention and the second invention of the present application is composed of a laminated film, and the innermost sealant film is entirely made of heat-resistant linear polyethylene (LL).
DPE) and unstretched polypropylene (CPP), and the like, and high-pressure vapor release means 7 is formed by welding by heat sealing. The high-pressure steam release means 7 , 18 of the film joint portion 6 and the remaining heat-sealing band portion 8,
8, 19 , 19, the side seals 3, 3, 14 , 14, the end seals 5, 15, and the top seals 10 , 21 are uniform in seal temperature and seal pressure. No material other than the innermost sealant film is partially processed into the surface of the portion corresponding to the high-pressure steam releasing means 7 or 18 , and another material is not used on the opposing surface. or,
Neither low-temperature heat-sealing nor low-pressure heat-sealing for weakening the sealing strength is performed on the portions corresponding to the high-pressure steam releasing means 7 and 18 .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1A is a perspective view of a sealed microwave cooking bag according to an embodiment of the first invention of the present application, and FIG. FIG.

FIG. 2 (a) is a side view showing an expanded state when the sealed microwave cooking bag containing the packaged item of FIG. 1 (b) is heated by a microwave oven, and FIG. An enlarged view of a main part for explaining that the heat seal of the high-pressure steam release means for releasing steam during high-pressure expansion is opened and an opening can be made, and (c) shows an electronically sealed microwave cooking bag containing an object to be packaged. FIG. 3 is a perspective view showing an expanded state when heated in a microwave.

[3] relates to the embodiment of the present second invention, the (a) is a perspective view of a microwave cooking seal bag, (b) it is to be packaged in the perspective view of a microwave heating cooking sealed bag The perspective view which shows the expanded state when it accommodates and heat-opens, and heats with the microwave oven.

FIG. 4 is a perspective view of a pillow wrapping three-sided seal bag in which a backing seal is located at the center of the upper surface according to a first unknown product before the present inventors completed the present invention.

FIG. 5 is a perspective view of a four-side seal bag having a joint joint on the bag upper surface according to a second unknown prototype before the present inventors completed the present invention.

FIG. 6 is a perspective view of a stand pouch bag having a palm joint at an upper portion of a side portion according to a third unknown prototype before completion of the present invention by the present inventors.

[Description of Signs] 1 ... Lower surface part, 2 ... Top surface part, 3 ... Side seal, 4 ... Opening, 5 ... End seal, 6 ... Film joint part, 7 ... .High-pressure steam release means, 8 ...
Heat seal band portion, 9: inner edge (curve) of heat seal band portion 8, S1: packaged object, 10: top seal, 11: notch, 12, 13, ... side surface portion,
14 ... side seal, 15 ... independent means, 16.
..Opening, 17 ... Film joint part, 18 ... High-pressure vapor release means, 19 ... Heat seal strip part, 20
... Inner edge (curve) of heat seal band portion 19, S2
··· Packaged objects, 21 ··· Top seal, 22 ··· Notch.

[Procedure amendment 6]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 8]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (3)

[Claims] 1. A high-pressure vapor release means, wherein a bag is provided with a peelable heat seal band at a portion where the film overlaps in a palm shape, wherein one portion of the heat seal band protrudes in a V-shape toward the inside of the bag. Is formed, and the outermost edge of the heat seal band corresponding to the high-pressure vapor release means and the portion located most inward of the bag is the high-pressure vapor release means formation start end at the inner edge of the heat seal band. In a sealed microwave cooking bag, which is located more inward of the bag than the tied line and has a configuration in which the heat seal of the high-pressure steam release means peels off and releases steam due to an increase in vapor pressure in the bag during heating. The closed bag has side openings formed on both sides of a lower surface portion and an upper surface portion in a palm shape, and has an opening for accommodating an article to be packaged at one end, and the other end is closed by a loop or an end seal in a palm shape. A film which is provided and is located on the shoulder near the end seal or the opening on the upper surface, and the film constituting the upper surface protrudes outside the bag, overlaps in a palm shape, and is divided at the protruding end. A heat seal portion as the high-pressure vapor release means is provided at a central portion in the length direction of the film joint portion, and the shape of the remaining heat seal band portion of the film joint portion is the heat seal portion. The rising base end of the film joint portion at the inner edge of the band portion and the vicinity of the high-pressure vapor release means forming start end are connected by a straight line or a curve, and the object to be packaged is accommodated from the opening, and the opening is heat-sealed. In the film joint portion, both sides expand due to an increase in vapor pressure in the bag at the time of heating, and the heat seal peels off from the projection at the inner end of the high-pressure vapor release means to release the vapor and release the vapor. A sealed bag for microwave cooking, wherein the sealed bag is configured to maintain an inflated state and an opened state even after the heating. 2. A high-pressure vapor release means wherein a heat-sealable strip is provided at a portion where the films overlap in a palm-shape manner, wherein one part of the heat-sealable strip projects in a V-shape toward the inside of the bag. Is formed, and the outermost edge of the heat seal band corresponding to the high-pressure vapor release means and the portion located most inward of the bag is the high-pressure vapor release means formation start end at the inner edge of the heat seal band. In a sealed microwave cooking bag, which is located more inward of the bag than the tied line and has a configuration in which the heat seal of the high-pressure steam release means peels off and releases steam due to an increase in vapor pressure in the bag during heating. The airtight bag is provided with a side seal in which both side edges of a pair of side portions are closed together in a palm shape, has a self-supporting means at a lower portion, has an opening at an upper end for accommodating a packaged object, and is located at an upper portion of one side portion. And that side There is a film joint portion in which the film constituting the portion extends outside the bag and overlaps in a palm-shape manner and is divided at the projecting end, and the high-pressure vapor escape means is provided at the central portion in the length direction of the film joint portion. A heat seal portion is provided, and the shape of the remaining heat seal band portion of the film seam portion is near the rising base end of the film seam portion at the inner edge of the heat seal band portion and the start end of the high-pressure vapor release means forming start. And are connected by a straight line or a curve, and heat-sealed the opening while accommodating the packaged object from the opening,
The film joint portion expands on both sides due to an increase in the vapor pressure in the bag during heating, the heat seal peels off from the protrusion at the inner end of the high-pressure vapor release means, releases the vapor, and is in an expanded state even after the vapor is released. A sealed bag for microwave cooking, wherein the sealed bag is configured to maintain an open state. 3. The sealed bag according to claim 1 or 2 is made of a laminated film, and the innermost sealant film is entirely made of heat-resistant linear polyethylene or unstretched polypropylene. A sealed microwave cooking bag, which is made of the same material.