JP6714900B2 - Sheet forming tray and food tray - Google Patents

Description

The present invention relates to a sheet forming tray and a food container tray that store food and heat and sterilize the stored food.

In recent years, a tray-shaped container is filled with a food material, and a lid material is sealed and sealed in the container, and then the food material is cooked and sterilized by using a microwave. In this case, a non-return valve is attached to the lid material, and the non-return valve has a structure for releasing air and vapor in the container when the pressure in the container becomes high in order to prevent the container from bursting. .. When the food material in the container has been heated, the check valve is closed and the pressure in the container is reduced. When the inside of the container is depressurized, the container is deformed inward, and especially the bottom is turned inward (see Patent Document 1).

U.S. Patent Application Publication No. 2006/0134289

By the way, recently, there is a demand for a tray-shaped container provided with two or more accommodation portions. However, if the bottom of a conventional container (see, for example, Patent Document 1) is used as the bottom of such a container, the peripheral edge of the bottom of the container is locally deformed when the pressure inside the container is reduced. , The appearance may deteriorate. Further, if the strength of the side portion of the container is insufficient as compared with the bottom portion of the container, the side portion of the container is locally deformed before the bottom portion of the container is inverted, and the appearance is deteriorated. There is a risk.

In particular, in the above container, when the thickness of the container is reduced in order to reduce the material of the container, the problem that the local deformation becomes more remarkable occurs.

The present invention has been made in consideration of such a point, and even if the inside of a sheet forming tray having two or more accommodating portions is depressurized, local deformation occurs on the side portions. It is an object of the present invention to provide a sheet forming tray and a food tray that can prevent the above-mentioned phenomenon and maintain a good appearance.

The present invention is for storing foods, and in a sheet forming tray used when the stored foods are heat-cooked and sterilized, at least two storages formed at intervals from each other and around the storages. A flange part provided and a partition part provided between the storage parts are provided, and each storage part has a side part and a bottom part connected to the side part, and a plurality of parts are provided on the side part. The reinforcing rib is provided, and the reinforcing rib is provided in an area of the side portion excluding the partition portion side.

The present invention is the sheet forming tray, wherein the reinforcing rib extends horizontally in the side portion.

According to the present invention, the reinforcing rib is provided in an outer side region of the side portion and is not provided in an inner side region of the partition portion side, and a curvature radius of a horizontal cross section of the outer side region. Is a radius of curvature of a horizontal cross section of the inner side region, which is a sheet forming tray.

The present invention is the sheet forming tray, wherein the thickness of the central bottom portion is 0.2 mm or more and 0.6 mm or less.

The present invention includes the sheet forming tray, food stored in at least one of the storage units of the sheet forming tray, and a lid member welded to the flange of the sheet forming tray. It is a food tray.

According to the present invention, even if the inside of the sheet forming tray having two or more accommodating portions is depressurized, the side portions are not locally deformed, and the appearance can be favorably maintained. it can.

FIG. 1 is a perspective view showing a sheet forming tray and a lid member according to an embodiment of the present invention. FIG. 2 is a plan view showing the sheet forming tray according to the embodiment of the present invention. FIG. 3 is a front view showing the sheet forming tray according to the embodiment of the present invention. FIG. 4 is a partial side sectional view showing a sheet forming tray according to an embodiment of the present invention (a sectional view taken along a cutting line IV-IV in FIG. 5). FIG. 5 is a bottom view showing the sheet forming tray according to the embodiment of the present invention. FIG. 6 is a schematic view showing a process of producing a food tray using a sheet forming tray. FIG. 7 is a perspective view of the sheet forming tray according to the embodiment of the present invention when the inside pressure is reduced, as seen from the bottom side. FIGS. 8A to 8D are schematic views showing a process of cooking a food tray.

An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 are views showing an embodiment of the present invention.

First, the outline of the sheet forming tray according to the present embodiment will be described with reference to FIGS. 1 to 5.

The sheet forming tray 10 shown in FIG. 1 to FIG. 5 is used when the food 16 is stored as described later and the stored food 16 is heat-cooked and sterilized. Such a sheet forming tray 10 is provided between two accommodating portions 11A and 11B formed at a distance from each other, a flange portion 30 provided around the accommodating portions 11A and 11B, and the accommodating portions 11A and 11B. The partition section 35 is provided.

Of these, the storage units 11A and 11B each store the food 16 as will be described later, and are composed of a first storage unit 11A having a large volume and a second storage unit 11B having a small volume. The volume of the first storage portion 11A and the volume of the second storage portion 11B may be the same as each other, or the volume of the second storage portion 11B may be larger than the volume of the first storage portion 11A. ..

The flange portion 30 includes a flange peripheral edge portion 31 located on the peripheral edges of the storage portions 11A and 11B, and two grip portions 32 that horizontally extend from the storage portions 11A and 11B toward the outside in the longitudinal direction of the sheet forming tray 10. I'm out. The grip portion 32 is gripped by the user when eating. Each grip 32 is formed with a recess 33 having a substantially arcuate shape in plan view. The recess 33 is provided to prevent heat from being transferred to a finger when the user carries the cooked sheet forming tray 10.

The partition part 35 is formed between the storage part 11A and the storage part 11B. The surface of the partition portion 35 is flat, and is located on the same plane as the surface of the flange peripheral edge portion 31. The storage portions 11A and 11B are adjacent to both sides of the partition portion 35 in the longitudinal direction.

Next, the configurations of the storage units 11A and 11B will be further described.

Each of the storage parts 11A and 11B has a side part 12 and a bottom part 20 connected below the side part 12. The storage sections 11A and 11B have a shape that is line-symmetric with respect to the longitudinal axis _CL (see FIG. 2) of the sheet forming tray 10.

Each bottom portion 20 has a function of promoting deformation of the bottom portion 20 when the inside of the storage portions 11A and 11B is depressurized. This allows the bottom portion 20 to be deformed more easily than the side portion 12. Each bottom part 20 has a central bottom part 21 located at the center, a peripheral bottom part 22 located at the periphery of the central bottom part 21, and an inclined bottom part 23 provided between the central bottom part 21 and the peripheral bottom part 22. There is.

Of these, the central bottom portion 21 is formed of a substantially flat surface. As shown in FIG. 2 and FIG. 5, the outer periphery of the central bottom portion 21 has a curved shape having a portion having a different radius of curvature, which does not include a straight portion. More specifically, the outer periphery of the central bottom portion 21 has a substantially flat rounded triangle shape or a rice ball shape. The outer periphery of the central bottom portion 21 has an inner peripheral portion 21a, an outer peripheral portion 21b, and a corner portion 21c connecting the inner peripheral portion 21a and the outer peripheral portion 21b. The inner peripheral portion 21a, the outer peripheral portion 21b, and the corner portion 21c are formed by curves having different radii of curvature. This radius of curvature is largest at the inner peripheral portion 21a, smallest at the corner portion 21c, and intermediate between the outer peripheral portion 21b.

The thickness t2 of the central bottom portion 21 is, for example, 0.2 mm or more and 0.6 mm or less, and the thickness t3 of the flange portion 30 is, for example, 0.7 mm or more and 1.0 mm or less (see FIG. 4). .. As described above, by reducing the wall thickness t2 of the central bottom portion 21 and the wall thickness t3 of the flange portion 30, the material of the sheet forming tray 10 can be reduced, and the manufacturing cost of the sheet forming tray 10 can be reduced.

The peripheral bottom portion 22 is formed of a substantially flat surface and is arranged substantially parallel to the central bottom portion 21. The peripheral bottom portion 22 is provided in a ring shape over the entire outer circumference of the inclined bottom portion 23. In addition, the outer periphery of the peripheral bottom portion 22 is in the shape of a generally rounded triangular triangle or a rice ball that is slightly larger than the central bottom portion 21. The outer periphery of the peripheral bottom portion 22 has an inner peripheral portion 22a, an outer peripheral portion 22b, and a corner portion 22c connecting the inner peripheral portion 22a and the outer peripheral portion 22b. Of these, the radius of curvature of the inner peripheral portion 22a is the largest, the radius of curvature of the corner portion 22c is the smallest, and the radius of curvature of the outer peripheral portion 22b is in the middle.

Similarly, the inner periphery of the peripheral bottom portion 22 has an inner inner peripheral portion 22d, an outer inner peripheral portion 22e, and a corner portion 22f connecting the inner inner peripheral portion 22d and the outer inner peripheral portion 22e. Of these, the inner radius 22d has the largest radius of curvature, the corner 22f has the smallest radius of curvature, and the inner radius 22e has the middle radius of curvature.

The inclined bottom portion 23 is a curved surface that connects the central bottom portion 21 and the peripheral bottom portion 22. The inclined bottom portion 23 is provided over the entire outer circumference of the central bottom portion 21. The outer circumference of the inclined bottom portion 23 corresponds to the inner circumference of the peripheral bottom portion 22, and the inner circumference of the inclined bottom portion 23 corresponds to the outer circumference of the central bottom portion 21. By providing the inclined bottom portion 23 in this way, the central bottom portion 21 can be inverted when the inside of the storage portions 11A and 11B is depressurized, and at this time, the deformation of the bottom portion 20 should be inconspicuous. You can

At least before the sheet forming tray 10 is deformed, the inclined bottom portion 23 is inclined with respect to the central bottom portion 21 and is also inclined with respect to the peripheral bottom portion 22. As shown in FIG. 4, in the vertical cross section of the sheet forming tray 10, the angle d1 formed by the central bottom portion 21 and the inclined bottom portion 23 can be 25° or more and 35° or less.

Further, an inclined wall 24 is provided along the outer periphery of the peripheral bottom portion 22. The inclined wall 24 is connected to the lower end portion 12c of the side portion 12 and extends along the outer circumference of the peripheral bottom portion 22 in the entire circumferential direction. The inclined wall 24 has a substantially rounded triangular shape or a rice ball shape, and its width is substantially constant over the entire circumference.

Note that, at least in the state before the sheet forming tray 10 is deformed, the inclined wall 24 is inclined with respect to both the side portion 12 and the peripheral bottom portion 22 in the vertical cross section (see FIG. 4 ). Specifically, the angle d2 (see FIG. 4) formed between the inclined wall 24 and the horizontal plane (the central bottom portion 21 and the peripheral bottom portion 22) can be 35° or more and 55° or less.

Next, the side portion 12 of the storage portions 11A and 11B will be described. Each side portion 12 extends vertically between each bottom portion 20 and the flange portion 30, and has a substantially rounded triangular shape or a rice ball-shaped horizontal cross section. The area of the horizontal cross section of each side portion 12 gradually decreases from the flange portion 30 side (upper side) toward the bottom portion 20 side (lower side).

Each side portion 12 includes a plurality of (four) reinforcing ribs 13 that prevent the side portion 12 from being deformed when the pressure inside the sheet forming tray 10 is reduced. The reinforcing rib 13 protrudes outward from the storage portions 11A and 11B to project outward. The plurality of reinforcing ribs 13 extend in parallel to each other in the horizontal direction. Valleys 14 are formed between the reinforcing ribs 13.

In this case, each reinforcing rib 13 is not provided over the entire circumference of each side portion 12, but is provided in an area excluding the partition portion 35 side. That is, the reinforcing rib 13 is provided in the outer side region 12a of the side portion 12 where the horizontal section has a relatively small radius of curvature. By providing the reinforcing rib 13 also in this manner, the strength of the outer side region 12a of the side portion 12 can be increased.

The outer side region 12a has a shape in which the reinforcing ribs 13 and the valleys 14 are alternately arranged over the entire area in the vertical direction. As a result, the strength is increased over the entire outer side region 12a in the vertical direction, and the outer side region 12a is prevented from being deformed.

As shown in FIGS. 3 and 4, each reinforcing rib 13 has a curved shape such as an arc shape or an elliptic arc shape in the vertical cross section. In this case, although the cross-sectional shapes of the four reinforcing ribs 13 are substantially the same, the present invention is not limited to this, and the four reinforcing ribs 13 may have different cross-sectional shapes.

In the present embodiment, the heights h (see FIG. 3) of the four reinforcing ribs 13 are substantially the same as each other, but the present invention is not limited to this, and each reinforcing rib 13 may have a different height h. good. Further, each reinforcing rib 13 is provided in parallel to the central bottom portion 21 which is a plane on which the sheet forming tray 10 is placed. However, the invention is not limited to this, and the reinforcing ribs 13 may extend in the vertical direction, or may extend obliquely with respect to the plane.

The thickness t1 of the side portion 12 (the thickness of the reinforcing rib 13) (see FIG. 4) is preferably 0.3 mm or more and 0.6 mm or less. As described above, by reducing the wall thickness t1 of the side portion 12, the material of the sheet forming tray 10 can be reduced, and the manufacturing cost of the sheet forming tray 10 can be reduced. Also in this case, since the reinforcing ribs 13 are formed in the outer side regions 12a of the side portions 12, it is possible to prevent the outer side regions 12a from being deformed when the pressure inside the storage units 11A and 11B is reduced. You can

On the other hand, the reinforcing rib 13 is not provided in the inner side region 12b on the partition 35 side. The inner side region 12b has a large radius of curvature in a horizontal cross section (close to a straight line) and has a smoothly curved curved surface shape. Therefore, if the reinforcing ribs 13 extending in the horizontal direction are provided in the inner side region 12b, the inner side region 12b may be easily deformed in the vertical direction when the pressure inside the storage units 11A and 11B is reduced. is there. Therefore, by not providing the reinforcing rib 13 in the inner side region 12b, it is possible to prevent the inner side region 12b from being deformed.

Such a sheet forming tray 10 is a single layer sheet of thermoplastic resin such as PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate) or EVOH or nylon (registered trademark). It is produced by molding (sheet molding) a multilayer sheet including the barrier layer of. For example, when the sheet forming tray 10 is manufactured, a heated plate-shaped multilayer sheet is placed on a female mold, the multilayer sheet is pushed into the female mold to a certain extent by using a plug, and then vacuumed. It may be molded.

By the way, the food 16 (see FIG. 6) is stored in the sheet forming tray 10, and then the lid material (lid film) 40 (see FIG. 1) is welded to the flange portion 30 and the partitioning portion 35 to form the sheet forming tray 10. Sealed. Such a lid member 40 is made of, for example, PE (polyethylene) or PP (polypropylene), and the check valve means 41 is provided on, for example, the substantially central portion of the storage portion 11A (see FIG. 1). This check valve means 41 has a structure in which when the insides of the storage units 11A and 11B are pressurized, air and steam inside the storage units 11A and 11B can escape, but external air does not flow into the storage units 11A and 11B. ing. Since a conventionally known one can be used as the check valve means 41, detailed description thereof will be omitted here. In this case, by providing a non-welding region that is not welded to the lid member 40 in a part of the partition portion 35, air can pass through this non-welding region. Accordingly, even when the check valve means 41 is provided on the storage portion 11A, not only the air in the storage portion 11A but also the air in the storage portion 11B can be released from the check valve means 41. ..

Next, the operation of the present embodiment having such a configuration will be described with reference to FIGS.

FIG. 6 shows a process of producing the foodstuff tray 15 using the sheet forming tray 10. In FIG. 6, reference numeral 50 indicates a foodstuff tray manufacturing apparatus for manufacturing the foodstuff tray 15. The food tray manufacturing device 50 has a tray supply device 51, a filling device 53, a check valve supply device 54, a heating device 55, and a cooling device 56 in this order from the upstream side. Further, the foodstuff tray manufacturing apparatus 50 has a carrying device 52 including a conveyor and the like, and the sheet forming tray 10 is carried by the carrying device 52.

In FIG. 6, first, the empty sheet forming tray 10 is supplied from the tray supply device 51 to the transport device 52.

Next, the filling device 53 provided on the downstream side of the tray supply device 51 fills one or both of the storage units 11A and 11B of the sheet forming tray 10 with the food 16. At this time, the food 16 is filled with a raw material, a semi-cooked material, or a mixed material. The filling device 53 may be configured to sequentially fill a plurality of types of raw materials.

On the other hand, a check valve supply device 54 is provided near the transport device 52, and in this check valve supply device 54, the check valve means 41 is attached to the lid member 40. In this case, the check valve means 41 is attached to a position corresponding to a substantially central portion of the storage portion 11A.

After that, the lid member 40 to which the check valve means 41 is attached is welded to the sheet forming tray 10 flowing on the conveying device 52 by, for example, heat sealing, and the sheet forming tray 10 filled with the food 16 is formed. It is sealed.

Subsequently, the sheet forming tray 10 sealed by the lid member 40 is conveyed into the heating device 55 provided on the downstream side of the filling device 53. The heating device 55 is composed of, for example, a microwave heating device, and plays a role of heating and cooking the food 16 in the sheet forming tray 10 and sterilizing the food 16.

In the heating device 55, the food 16 in the storage units 11A and 11B is cooked and sterilized. At this time, the pressure inside the storage portions 11A and 11B is increased, and the lid member 40 bulges upward. Then, when the pressure inside the storage units 11A and 11B reaches a predetermined pressure, water vapor and air generated from the food 16 are discharged to the outside from the check valve means 41. After the water vapor or air is released, the pressure inside the storage portions 11A and 11B decreases, the check valve means 41 closes, and the lid member 40 is returned downward.

After the food 16 is heated and sterilized in this manner, the sheet forming tray 10 is conveyed from the heating device 55 to the cooling device 56. The pressure inside the sheet forming tray 10 is reduced during this conveyance. In the cooling device 56, the sheet forming tray 10 containing the food 16 is cooled to, for example, 0° C. or higher and 10° C. or lower.

After being cooled in the cooling device 56, the sheet forming tray 10 is carried out from the cooling device 56. In this way, a food container including the sheet forming tray 10, the food 16 stored in one or both of the storage units 11A and 11B, and the lid member 40 welded to the flange portion 30 of the sheet forming tray 10 is provided. The tray 15 is obtained.

By the way, as described above, when the insides of the storage units 11A and 11B are depressurized in the cooling device 56, each bottom portion 20 is recessed toward the inside of the storage units 11A and 11B, and the central bottom portion 21 is stored in the storage units 11A and 11B. Inside (see FIG. 7).

In the present embodiment, each bottom portion 20 of the storage portions 11A and 11B has a central bottom portion 21, and the outer periphery of the central bottom portion 21 has a curved shape having portions having different radii of curvature that do not include straight portions. More specifically, the outer periphery of the central bottom portion 21 has a rounded triangular shape or a rice ball shape. For this reason, when the central bottom portion 21 is inverted into the storage portions 11A and 11B, the central bottom portion 21 is substantially uniformly recessed, and the peripheral edge of the bottom portion 20 is not locally deformed (see FIG. 7).

The reason for this is considered to be as follows. When the insides of the storage portions 11A and 11B are decompressed, first, of the outer periphery of the central bottom portion 21, a portion having a large radius of curvature (inner outer peripheral portion 21a) starts to be recessed. After that, a portion having the next largest radius of curvature (outer peripheral portion 21b) is recessed, and finally a portion having the smallest radius of curvature (corner portion 21c) is recessed. In this manner, the outer periphery of the central bottom portion 21 is sequentially recessed over the entire area in the circumferential direction, so that the central bottom portion 21 is substantially uniformly inverted in the circumferential direction. For this reason, there is no possibility that a specific portion of the outer periphery of the central bottom portion 21 is dented in a concentrated manner, and local deformation does not occur at the peripheral edge of the bottom portion 20.

On the other hand, as a comparative example, if there is a straight line portion on the outer periphery of the central bottom portion 21, when the inside of the storage units 11A and 11B is depressurized, the straight line portion is dented intensively, and is locally located on the peripheral edge of the bottom portion 20. Deformation may occur. Further, if the outer periphery of the central bottom portion 21 is a perfect circle, deformation is unlikely to occur at the beginning when the pressure inside the storage portions 11A and 11B is reduced, but when the pressure reduction is advanced to some extent, the outer periphery of the central bottom portion 21 can be identified. There is a possibility that a dent will occur at the point of, and then this point will be intensively dented.

Further, in the present embodiment, as described above, the plurality of reinforcing ribs 13 are provided in the outer side region 12a of the side portion 12. As a result, the strength of the outer side region 12a of the side part 12 is sufficiently maintained, so that when the inside of the storage parts 11A and 11B is depressurized, the outer side region 12a of the side part 12 becomes larger than the storage parts 11A and 11B. It does not dent inward.

On the other hand, the reinforcing ribs 13 extending in the horizontal direction are not provided in the inner side region 12b on the partition 35 side. Accordingly, it is possible to prevent the deformation of the inner side region 12b having a relatively large radius of curvature in the horizontal cross section.

In this way, since the side portion 12 does not deform over the entire circumference, the deformation of the bottom portion 20 is not noticeable when viewed from the outside. Further, at this time, the inclined wall 24 is deformed, but is deformed substantially uniformly in the circumferential direction, so that the peripheral edge of the bottom portion 20 is not locally deformed. Further, when the central bottom portion 21 is turned inside the sheet forming tray 10, the inclined wall 24 serves as a grounding portion, so that the sheet forming tray 10 is not unstable and can be stably grounded.

Next, the operation of the user for cooking the thus-prepared food tray 15 will be described. 8A to 8D show a process of cooking the food tray 15.

As shown in FIG. 8A, the food tray 15 is placed in a cooking device 60 such as a microwave oven and heated. At this time, the pressure inside the storage portions 11A and 11B is increased, the lid member 40 bulges upward, and water vapor and air are discharged from the check valve means 41 (FIG. 8(b)). At this time, sound may be generated from the check valve means 41.

After the heating is completed, the food tray 15 is taken out of the cooking device 60. Then, the food tray 15 is naturally cooled, the insides of the storage units 11A and 11B are decompressed again, and the lid member 40 is recessed downward (FIG. 8C). Then, the lid member 40 is peeled off from the flange portion 30 so that the food 16 in the storage portions 11A and 11B can be eaten (FIG. 8(d)).

As described above, according to the present embodiment, when the insides of the storage portions 11A and 11B are depressurized, the outer periphery of the central bottom portion 21 is recessed substantially circumferentially, and the central bottom portion 21 is located inside the storage portions 11A and 11B. Therefore, the peripheral edge of the bottom portion 20 is not locally deformed. As a result, the appearance of the food tray 15 can be favorably maintained.

Further, according to the present embodiment, a plurality of reinforcing ribs 13 extending in the horizontal direction are provided in the outer side region 12a of the side portion 12. Therefore, even when the thickness of the side portion 12 is reduced, it is possible to prevent a problem that the outer side region 12a of the side portion 12 is deformed. On the other hand, the reinforcing rib 13 is not provided in the region of the side portion 12 on the partition portion 35 side (inner side portion region 12b). Accordingly, it is possible to prevent a problem that the inner side region 12b having a large radius of curvature in the horizontal cross section is deformed due to the presence of the reinforcing rib 13 extending in the horizontal direction.

As described above, according to the present embodiment, the reinforcing rib 13 is provided in the outer side region 12a of the side portion 12 excluding the inner side region 12b on the partition 35 side. Thereby, the strength of both the outer side region 12a and the inner side region 12b of the side portion 12 is increased, and when the inside of the storage portions 11A and 11B is depressurized, the local deformation of the entire side portion 12 is prevented. Can be prevented.

The food 16 stored in the storages 11A and 11B is not limited to this, but may be curry, for example. In particular, when the food 16 containing a large number of particles such as cooked rice is used, the inside of the sheet forming tray 10 is greatly depressurized due to the existence of voids between the particles. Even in this case, the above configuration can reliably prevent local deformation from occurring in the peripheral edge of the bottom portion 20.

10 Sheet Forming Tray 11A, 11B Storage Section 12 Side 12a Outside Side Area 12b Inside Side Area 13 Reinforcing Rib 14 Valley 15 Food Tray 16 Food 20 Bottom 21 Center Bottom 22 Perimeter Bottom 23 Inclined Bottom 24 Sloping Wall 30 Flange Part 35 Partition part 40 Lid material 41 Check valve means

Claims (3)

While storing food, in the sheet forming tray used when the stored food is heat-cooked and sterilized,
At least two storage parts formed at a distance from each other,
A flange portion provided around the storage portion,
A partition provided between the storages,
Each of the storage units,
The side,
A bottom portion connected to the side portion,
On the side portion, a plurality of reinforcing ribs extending in the horizontal direction are provided,
The reinforcing rib is provided in a region of the side portion excluding the partition portion side ,
The reinforcing rib is continuously provided in the outer side region of the side portion, is not provided in the inner side region of the partition portion side, the radius of curvature of the horizontal cross section of the outer side region is A sheet forming tray having a radius of curvature smaller than a horizontal cross section of the inner side region . The thickness of the central bottom portion located in the center of the bottom, sheet molding tray according to claim 1 Symbol mounting, characterized in that at 0.2mm or more and 0.6mm or less. A sheet forming tray according to claim 1 or 2 ,
Food stored in at least one of the storage section of the sheet forming tray,
A food-filled tray comprising: a lid member welded to the flange portion of the sheet forming tray.

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