JPH10338277A - External fitting body of microwave oven heat-cooking container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external fitting body capable of achieving the heat- cooking by a microwave oven by a container in its entirely, effective in insulation when the cooked food in serving on the table, and excellent in printing effect. SOLUTION: In a conical inverse-trapezoidal outer cup 10 to house a part in the vicinity of a body part side wall of a cup-shaped packaged body to achieve the heat-cooking by a microwave oven by keeping the prescribed clearance, a curl part 2 projected inward of an upper end part of the outer cup is fitted to an annular recessed groove 12 or a recessed part 14 of a longitudinal rib R surrounding the outer periphery of an upper part of the side wall of a cup-shaped packaged body, and fixed to the cup-shaped packaged body C, and a cup raw paper provided with a thermoplastic resin layer on only an inner surface is used for a base material of the outer cup 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking method in which a food is cooked in a microwave oven with the food still in a cup-shaped package. Printing media,
The present invention relates to an exterior body having an excellent effect as a decorative base material.

[0002]

2. Description of the Related Art Instead of removing frozen foods, chilled foods, or aseptic packaged foods at normal temperature from a package and transferring them to tableware and heating and cooking them in a microwave oven,
In many cases, the entire package is heated and cooked and directly provided to a dining table. Among the various types of packages used for this purpose, examples of cup-shaped packages are "chawanmushi," which is directly packed in paper cups and overcapped, and directly packed in plastic sheet molded containers, and film lids Sealed with material, packed in a double plastic sheet molded container with a gap between them, such as "spaghetti", "oden", "boiled fish" etc. inserted in the outer box or sleeve, and fitted with an overcap "Seasoned rice" and the like. In addition, cooking by microwave oven is not only warming, but also increasing the internal pressure by controlling the opening area of the vent hole for preventing rupture, cooking by heating at a higher temperature, or steaming for a while, furthermore, In some cases, they can be eaten deliciously.
In any case, it is necessary to remove the package heated by the microwave from the microwave while it is hot. Also, JP-A-5-16977, JP-A-5-3138.
Japanese Patent Application Laid-Open Publication No. H11-15095 and the like have proposed a double-walled heat-insulating cup made of plastic and paperboard as an insulating cup instead of a foamed plastic cup for instant noodles in which hot water is poured and cooked. These may also be used as microwave cooking containers.

[0003]

However, in the case of a double plastic sheet molded container such as the above-mentioned "seasoned rice", the rigidity of the side wall of the plastic container is reduced at high temperatures, and the space provided by the double wall is maintained. Is difficult, the heat insulation effect is lost, and there is a problem that it cannot be held hot. Further, when performing curved surface printing on the outer container, there is a problem that a full-color and high-precision preprint having high density cannot be performed as in the case of paper. In addition, there is a problem that the amount of plastic used is larger than that of a normal plastic container, it is difficult to reduce the volume, and the environmental load is increased.
The double container made of plastic and paperboard proposed in JP-A-5-16977 and JP-A-5-3138 is such that a tubular body made of paperboard is inserted or closely fitted to the outside of a plastic cup containing an inorganic filler. To join the upper and lower sides of the side wall, providing a gap in the middle of the trunk,
There is a shape restriction that both upper side walls must have the same taper, and in this type of bonding method, there is a possibility of falling off during use unless a heat-resistant adhesive is used. The present invention has been made in view of the above-described problems, and can be firmly attached to a cup package that is heated and cooked by a microwave oven to provide heat insulation and increase the degree of freedom in the shape of the cup package. In addition, an object of the present invention is to provide an exterior body of a microwave cooking container that functions as an excellent printing medium.

[0004]

Means for Solving the Problems To solve the above-mentioned problems, a bottomed cone which covers the periphery of the side wall of a cup-shaped package for heating and cooking while food is contained in a microwave oven while maintaining a predetermined gap. An outer cup having an inverted trapezoidal shape, wherein a next engaging means is formed between an upper portion of a side wall of the outer cup and an upper portion of a side wall of the cup-shaped package. (1) The upper part of the side wall of the cup-shaped package having a predetermined taper and outer diameter is inserted into the upper part of the outer cup having the inner diameter smaller than the outer diameter and having a smaller taper than the taper. Let it. (2) A curl portion formed by curling the upper end of the outer cup so as to protrude inward and an annular groove surrounding an outer periphery of an upper portion of a side wall of the cup-shaped package are fitted. (3) A curled portion in which an upper end portion of the outer cup is curled so as to protrude inward is fitted to a recessed portion at the upper end of a plurality of vertical ribs provided at least on the upper side wall of the cup-shaped package. Further, the outer cup base material is a paperboard provided with a thermoplastic resin layer only on the inner surface, and is used as a print medium for information on contents and a decorative base material as tableware. The exterior body of the microwave cooking container according to claim 1, wherein:

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings. FIG. 1 is an external view of an exterior body of a microwave cooking container according to the present invention. Hereinafter, the outer package of the microwave cooking container according to the present invention is referred to as “outer cup”, and the cup-shaped package is referred to as “inner cup”. FIG. 1A shows an outer cup 10 of a straight type, and a top edge T is left as it is with a blank edge. FIG. 1 (b)
An outer cup 10 of an inner curl type in which a top edge is curled inward and a curled portion 2 is projected inward. Each of the side walls has a taper smaller than that of the inner cup C in which food is placed. FIGS. 1, (c) and (d) are external views of the bottom of the outer cup. As shown in FIG. 1 (c), the structure of the bottom is such that the periphery of the bottom plate 3 is wound around the lower end of the side wall. As shown in FIG. 1 (d), the folded piece 5 at the lower end of the side wall of the outer cup 10 is folded inward around the bottom plate 3 to form a flat bottom. There is something. Any of these may be employed for the outer cup 10.

FIG. 2 is an external view of the inner cup C. FIG. 3 is a sectional view showing an engaged state between the inner cup and the outer cup. The cup-shaped package (hereinafter referred to as an inner cup) shown in FIG. 2A is engaged with and integrated with a straight type outer cup 10, and the engaged state is shown in FIG. 3A.
Shown in The engaging means in this case corresponds to claim 2, wherein the taper and the upper part of the side wall 11 of the inner cup C having a predetermined taper and an outer diameter or a diameter (in the case of a circular cup) have a smaller taper. This is because the upper part of the side wall of the outer cup 10 having an inner peripheral dimension or diameter slightly smaller than the outer peripheral dimension is forcibly inserted. According to this means, the degree of working of the outer cup 10 can be reduced, and it can be used for the inner cup C having an elliptical or rounded opening.

The inner cup C shown in FIG. 2B is engaged with and integrated with the inner curl type outer cup 10, and the engaged state is shown in FIG. 3B. The engaging means corresponds to claim 3, wherein the curl portion 2 protruding inside the outer cup 10 and the annular concave groove 12 surrounding the outer periphery of the side wall provided immediately below the flange F of the inner cup C are provided. This is due to the fitting of Also in this case, the outer cup 10 is forcibly pushed into the inner cup C, and
Are expanded and restored to the original size at the position of the concave groove 12 to be fitted. Therefore, the inner circumference of the curl portion 2 is set slightly smaller than the circumference of the upper part of the side wall of the inner cup C.

The inner cup C shown in FIG. 2 (c) is engaged with and integrated with the inner curl type outer cup 10.
The engaged state is shown in FIG. FIG. 3C is drawn in a vertical cross section of a portion of the vertical rib R. The engaging means in this case corresponds to claim 4, wherein the curl portion 2 protruding inside the outer cup 10 and the recessed portion 13 at the upper end of the plurality of vertical ribs R provided at least on the upper side wall of the inner cup C.
This is due to the fitting. Also in this case, the outer cup 10
Is forcibly pushed into the inner cup C, and the vertical rib R
While passing over, the curl portion 2 is once expanded and fitted at the depression 13 at a point past the vertical rib R to be integrated.
In the case where the inner cup C is a relatively thin wall formed by the compressed air / vacuum forming method, the side wall toward the inner cup C is also deformed so that the vertical rib portion R is pushed inward during the above forced pushing. Is restored at the time of fitting. Therefore, the resistance at the time of insertion is smaller and the fitting can be easily performed. FIG.
As compared with the case (b), the space between the inner and outer cups, particularly the space above the side wall, can be increased, and the heat-resistant claim can be effectively given. This is apparent from the cross-sectional view of the portion without the vertical rib R shown in FIG.

FIG. 4 is a sectional view of the double container 20 in which the inner cup C and the outer cup 10 are fitted and integrated. FIG.
(A) is an outer cup 10 having a thread end 4, and FIG.
In the case of using a flat bottom type outer cup 10 respectively,
An engagement means corresponding to claim 3 is taken as an example. Although not shown, after filling the contents into the inner cup C,
Apply an overcap so as to cover the entire opening, or place the film lid material on the flange F or on the flange F
The overcap may be applied after being provided on the undercut surface inside. Thus, the outer cup 10 is filled with respect to the inner cup C after filling and capping.
Are engaged. In this engagement, the outer cup 10 may be fitted to the empty inner cup C, and then filling and capping may be performed. The engagement can be achieved by simply dropping the inner cup C into the outer cup 10 and pushing the inner cup C until the curl portion 2 is fitted into the concave groove 12. Conversely, the outer cup is moved toward the inner cup C from below. It may be pushed so as to cover. In the double container 20 combined in this manner, the outer cup 10 is integrated with the inner cup C by the above-mentioned fitting,
A space is formed between the side walls 1 and the side plates 11 and between the bottom plate 3 and the bottom plate 13, and the space provides heat insulation to the inner cup C.

The degree of fitting when using the engaging means shown in FIGS.
2 or the cross-sectional shape of the recessed portion 14, the circumferential diameter difference between the curled portion 2 and the concave groove 12 or the recessed portion 14, the rigidity of the inner and outer cup materials, the resilience, and the like. It is not necessary, and after use, it is sufficient if the flanges F and the bottom of the outer cup 10 are detached by holding them with the fingertips so that they can be separated. Rather, it is more effective for sorting and disposal after use.

The inner cup C is suspended by the outer cup 10 as shown in FIG. Therefore, the shape of the inner cup C is free as long as it is within the space of the outer cup 10, and may be, for example, hemispherical. This shape is an important factor in performing uniform heating cooking in a short time in a microwave oven.

As the paperboard used for the outer cup 10 according to the present invention, a paperboard provided with a thermoplastic resin layer, for example, a polyethylene resin layer only on the inner surface is preferably used. If the resin layer is provided on both sides, the paperboard is also quickly heated during microwave cooking, and the moisture inside the paperboard breaks through the resin layer on the surface and evaporates, so that the side wall surface has foamed. This is because a beautiful printed surface may be impaired. In addition, the outer cup 10 may be scorched at the thread end 4 depending on the microwave heating condition and impair the aesthetic appearance. Therefore, it is preferable to make the bottom part a flat bottom type to avoid this point.

Printing on the outer cup 10 can be pre-printed at the sheet stage of the paperboard by a known printing method. Comparing this printing effect with the curved printing of the conventional double plastic container, it is excellent in all aspects such as ink density, definition, gradation, printable area, printing efficiency, etc. Not only is it an excellent information medium for transmitting information about the table, but also a decorative base material that provides a design that matches the atmosphere of the dining table.

The paperboard used for the outer cup 10 according to the present invention has stiffness (rigidity), and cup base paper excellent in workability such as curling is preferably used. Further, the outer cup 10 shown in FIG. 1 can be easily formed using a normal paper cup forming machine.

In addition, the outer cup 10 according to the present invention has a strong element as a support for a microwave cooking vessel, and can be used as a support at practically every cooking site. That is, the outer cup 10 may be sold separately from the inner cup C which is sold alone, and may be manually fitted to the inner cup C and used immediately before microwave cooking. In this case, the outer cup 10 has a design similar to tableware, and can be removed from the inner cup C and reused after use.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The inner cup C has a sectional shape shown in FIG.
From a polypropylene sheet (1.0 mm thick)
200cc capacity plastic molded by compressed air / vacuum molding
A stick cup was used. The upper part of the side wall has a width of 4
A concave groove 14 having a depth of 4 mm and a depth of 4 mm was provided. Outer cup
10 has the same cross section as shown in FIG.
Create an example sample with the following specifications,
Press into inner cup C to fit curl 2 into groove 14
Then, a double container 20 was obtained. The height of the outer cup: 80 mm The outer diameter of the curled portion: 92 mm The inner diameter of the curled portion: 84 mm In the sample of the example of the outer cup 10, the order is from the outside.
A laminate having the following laminate structure was used. Side wall: OP varnish layer / ink layer / cup base paper 280 g
/ M^Two/ Polyethylene 20 μm Bottom: PE 20 μm / cup base paper 220 g / m^Two  Double volume with outer cup 10 and inner cup C of the above embodiment
That is commercially available as cooked frozen food in the container 20
"Pirafu" in Tic Double Cup Container (200
g) was transferred to an example sample, while commercially available
Plastic double cup container containing "Pilafu"
As a comparative sample, microwave cooking was 600W,
The test was performed under the conditions of 4 minutes, and immediately removed with bare hands. The result
As a result, in the case of the example samples,
Can be easily taken out of the microwave,
It was possible to have a container, but in the case of the comparative sample
Except when handling the lunge with your fingers
It also became. Outer cup 10 of the example sample after cooking
No abnormality is seen on the surface of
No damage to the design, print comparative sample
A superior printing effect in all respects compared to
Was completed. After use, remove the outer cup 10 from the inner cup C
It could be removed by hand.

[0017]

The outer cup 10 according to the present invention is replaced with the inner cup C.
By combining the above, excellent heat insulating properties can be imparted, and after heating in a microwave oven, it can be taken out of the microwave oven while it is hot, can be used as it is on a table, and can be easily eaten. Further, the degree of freedom of the shape of the inner cup C is expanded, and the inner cup C having the optimum shape for heating the content food can be adopted. Further, since the printing effect can be extremely excellent as compared with the printing on the plastic container, the printing medium can be a printing medium excellent in information on the contents of food, and a decorative effect suitable for the atmosphere of the dining table can be provided. Furthermore, conventional plastic 2
Compared with a heavy cup, the amount of plastic used can be reduced, and a microwave cooking container that can be separated and discarded after use can be provided.

[Brief description of the drawings]

FIG. 1 is an external view of an outer cup according to the present invention.

FIG. 2 is an external view of an inner cup.

FIG. 3 is a sectional view showing an engaged state of an inner cup and an outer cup.

FIG. 4 is a sectional view of a double container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall 2 Curl part 3 Bottom plate 4 Thread end 5 Folding piece 10 Outer cup 20 Double container 11 Side wall 12 Depression groove 13 Bottom plate 14 Falling part C Inner cup F Flange R Vertical rib T Top edge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kyosuke Suzuki, Inventor Dai 1-1 Nippon Printing Co., Ltd. 1-1 1-1 Ichigaya Kagacho, Shinjuku-ku, Tokyo

Claims (6)

[Claims] 1. A bottomed conical inverted frustum-shaped outer cup which covers a side wall around a side wall of a cup-shaped package for heating and cooking with a food in a microwave oven with a predetermined gap therebetween,
An exterior body of a microwave cooking container, wherein an engaging means is formed between an upper part of a side wall of the outer cup and an upper part of a side wall of the cup-shaped package. 2. The method according to claim 1, wherein said engaging means has an upper portion of a side wall of said cup-shaped package having a predetermined taper and an outer dimension, and said outer portion having a smaller taper than said taper and an inner peripheral dimension smaller than said outer dimension. 2. The exterior body of a microwave oven for cooking according to claim 1, wherein said exterior body is fitted with an upper portion of a side wall of the cup. 3. The fitting of a curled portion in which the engaging means curls the upper end of the outer cup so as to protrude inward and an annular groove surrounding an outer periphery of an upper side wall of the cup-shaped package. The exterior body of the microwave cooking container according to claim 1, wherein the combination is based on a combination. 4. The method according to claim 1, wherein the engaging means curls the upper end of the outer cup so as to protrude inward and an upper end of a plurality of vertical ribs provided at least on an upper side wall of the cup-shaped package. The exterior body of the microwave cooking container according to claim 1, wherein the exterior body is formed by fitting with a depression portion. 5. The microwave oven cooking container according to claim 1, wherein said outer cup is made of paperboard as a base material, and a thermoplastic resin layer is provided only on an inner surface of said base material. 6. An outer surface of the outer cup serves as a print medium of information on contents to be filled in the cup-shaped package,
2. The microwave oven cooking container according to claim 1, which is used as a decorative base material for tableware.