JPH0542977A - Container for electronic oven - Google Patents

Abstract

PURPOSE:To obtain a container easy to form a vapor escape hole. CONSTITUTION:A film 10 having a vapor escape hole 11 formed therein to escape the vapor produced in a container and heat-sealable faces on both the sides thereof is fusibly attached to an opening part of the container 7. An upper film 12 is then fusibly attached to the upper surface of the film 10 to close the vapor escape hole and, upon cooking by heating in an electronic oven, the upper film 12 is peeled off from the lower film to easily make the vapor escape hole 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven container filled with food or the like.

[0002]

2. Description of the Related Art In recent years, food products that can be cooked directly in a microwave oven have become widespread for reasons such as convenience of cooking.
This product is very convenient because it can be put in a microwave oven and cooked together with the container, and the container itself is disposable, but since the vapor pressure generated in the container is released by the heating, a part of the container is heated before heating. It is necessary to provide a steam vent hole. FIG. 6 shows a conventional microwave container, in which an inner film 3 having a heat-sealing property is welded to the lower surface of an opening of a container body 2 in which a food 1 is filled to seal the inside, and an outer lid is provided on the inside. 4 is a crowned structure. A vapor escape hole 5 is formed in the center of the outer lid 4. In the market, the container is kept sealed as it is or after being placed in a case or the like to be traded. On the other hand, when cooking, the outer lid 4 is once removed, the inner film 3 is peeled off, and the outer lid 4 is capped on the container body 2 again.
And cook in a microwave oven. However, the vapor pressure generated by heating escapes to the outside through the through hole 5, and there is no problem that the container is inadvertently expanded and deformed or ruptured.

[0003]

However, the conventional container is inconvenient because it takes time and effort to remove the outer lid 4 and to crown the container for cooking. Also, the inner film 3
When peeling off, there is a concern that the container may be collapsed and the contents may be spilled.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above technical problems and to obtain a container in which a vapor vent hole is easily provided. In order to achieve such an object, a film having heat sealability is welded to both sides of the container where vapor vent holes generated in the container are perforated, and an upper film for sealing the vent hole is welded to the upper surface of the film. The inventor of the container for microwave ovens.

[0005]

Operation: When cooking in a microwave oven, the upper film is peeled off to form a vapor escape hole.

[0006]

EXAMPLES Examples of the present invention will be described below. 1 is a perspective view of a microwave oven container 6 according to an embodiment of the present invention, FIG.
1A is a cross-sectional view taken along the arrow in FIG. 7 is the container body,
For example, it is made of polypropylene (PP), and the food 8 is filled therein. A flange 9 is formed in the opening of the container body 7, and the film 1 is formed on the upper surface of the flange 9.
0 is welded. In addition, a through hole 11 is provided at approximately the center of the film 10 to allow the vapor pressure in the container to escape. Further, the upper film 12 is welded to the upper surface of the film 10, whereby the through hole 11 is closed and the atmosphere inside the container and the outside atmosphere are blocked.

As shown in FIG. 3, the film 10 has three layers. For example, the upper layer 13 is a 30 μ unstretched polypropylene layer (CPP), the intermediate layer is a 12 μ polyethylene terephthalate layer (PET), and the lower layer is a 50 μ layer. It consists of an easy peel layer that can be easily peeled off, and has heat sealability on both the upper and lower surfaces. Further, as shown in FIG. 4, the upper film 12 has two layers, for example, the upper layer 16 is composed of an aluminum foil (Al) having a thickness of 40 μ, and the lower layer 17 is composed of an easy peel layer having a thickness of 30 μ which can be easily peeled off.

Here, the microwave container 6 as described above
An example of the manufacturing process will be briefly described with reference to FIG.
First, the film 10 is unrolled from the roll 18, and the cutter 19 is lowered at the position a to form the through hole 11. Next, the upper film 12 is supplied from above the film 10 at the position B. Next, the heat sealer 20 is lowered at the c position, and the upper film 12 is attached to the film 1.
It is heat-welded to the upper surface of 0. As a result, the through hole 11 is closed. Next, the container main body 7 in which the food 8 is preliminarily filled is supplied from below at the two position. Next, the heat sealer 21 is lowered at the position e, and the film 10 is heat-welded to the upper surface of the flange 9 of the container body 7. This closes the opening of the container body 7. Next, at the F position, the cutter 22 is lowered to cut the film 10 along the peripheral edge of the flange 9 of the container body 7. The microwave oven container 6 thus obtained is discharged in the direction of the arrow 23 and carried out to the next step.

[0009] In the microwave oven container 6 as described above, however, in the market, the upper film 12 is traded in a state where the through hole 11 is closed so that the sealed state of the container is maintained. It is hygienic. Further, when cooking in a microwave oven, the upper film 12 is peeled off to form the vapor passage hole 11 in advance and heating is performed. As a result, the vapor pressure generated by heating can be released to the outside from the vent hole 11, and there is no concern that the container body 7 inadvertently expands and deforms or bursts.

[0010]

In any case, in the microwave oven container of the present invention, it is possible to easily form a vapor vent hole by simply peeling off the upper film, so that the lid may be removed before cooking. , It's very convenient because you don't have to cover it with a lid. Further, since the vapor vent hole can be easily formed, there is no problem of spilling the contents by dropping the container when peeling the film. Further, the container can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of a microwave oven container according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along arrow of FIG. 1A-A.

FIG. 3 is a longitudinal sectional view of the film.

FIG. 4 is a vertical sectional view of the upper film.

FIG. 5 is a process chart showing an example of a manufacturing process of a microwave oven container.

FIG. 6 is a vertical sectional view of a conventional microwave oven container.

FIG. 7 is a vertical cross-sectional view showing a usage state of a conventional microwave container.

[Explanation of symbols]

 6 Microwave oven container 7 Container body 10 Film 11 Through hole 12 Top film

Claims (1)

[Claims] 1. A heat-sealing film is welded to both sides of a container body where a vapor hole generated in the container is formed, and an upper film for closing the hole is welded to the upper surface of the film. A container for a microwave oven.