JPH11208740A - Food packaging body for cooking by microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly set a timing for the purging of steam which is generated from a food heat-cooked by a microwave oven, by a method wherein for a packaging body which is sealed by heat-sealing or the like, at one part of the sealed part, a whistle mechanism which generates a sound by a rapid passing of steam is provided. SOLUTION: For a packaging body A which is constituted of a container main body 1 and a lid body 2, at a heat-sealed part 3, a whistle mechanism which is constituted of a reed 4 is provided. The reed 4 has a non-sealed part 4a, and is heat-sealed to the heat-sealed part 3 at both end parts 4b, and an outer peripheral edge part 5 which becomes a farther outer peripheral location than the non-sealsed part 4a is heat-sealed in a manner to be connected to the heat-sealed part 3. When a food is heated by a microwave oven under a state being sealed by the packaging body A, the outer peripheral edge part 5 is separated when the heat and the pressure of steam which is generated from the food have reached a specified level, and the whistle mechanism is opened. Then, the reed 4 vibrates and resonates when the steam rapidly passes the whistle mechanism, and a sound is generated, and the completion of the cooking is notified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for food for cooking in a microwave oven, which can be heated and cooked in a microwave oven without opening the food in a sealed package.

[0002]

2. Description of the Related Art At present, the penetration rate of microwave ovens in homes exceeds 90% in Japan, and various cooked foods compatible with microwave oven cooking are commercially available due to the convenience of cooking. The packaging form includes a bag or a container sealed with a lid, and the storage form is generally a retort type, aseptic packaging type, or frozen type.
However, if the food is heated in a microwave oven in a packaged state, there is a risk that the package may burst due to steam from the food generated by heating. As a solution to this problem, a packaging container provided with a steam venting mechanism has been conventionally developed.

[0003]

As the above prior art,
JP-A-4-31273 "Food package" (under examination pending), JP-A-63-260510 "Heat-cooking food whistling container" (Rejection assessment) and Utility model registration No. 2
No. 510596, “Food containers for cooking” and the like. Japanese Patent Application Laid-Open No. 4-31273 discloses a package in which, when heated in a microwave oven, the internal pressure increases due to steam generated from food, whereby a degassing section provided in a heat sealing section is peeled off and steam is released. However, it is necessary to provide a separate resin layer in the deaeration section, and the cost is expected to increase. Further, the package does not have a mechanism for notifying the completion of cooking.

Further, in the container disclosed in Japanese Patent Application Laid-Open No. 63-260510, a buzzer which emits a sound by rapid passage of steam generated by microwave heating is provided in a part of the lid to notify the completion of cooking. However, in the container, steam leaks from the initial stage of steam generation and the heating efficiency by the steam itself is inferior, and since the small hole for steam release is provided in the lid, the barrier property is taken into consideration. As it cannot be used for distribution as it is, a seal or exterior for separately closing the small hole is required.

Further, the above-mentioned utility model registration No. 2510596
In the case of the container according to the above, it is necessary to cover with a piercing projection on the lower surface of the lid so that the inner lid that seals the container is pierced as a vapor hole when the inner lid expands due to the vapor pressure generated by microwave heating. The buzzer provided in the buzzer emits a sound when steam passes to notify the completion of cooking. However, the container is limited to a structurally complicated one that requires an inner lid and a piercing projection. It was what was done.

[0006] In view of the problems in the prior art described above, the present inventors have taken into account the uniform and rapid heating efficiency of a microwave oven, and confined the steam (water vapor) generated from food during the heating as much as possible in a container. It is preferable to effectively use the heating effect of the steam in the state, and for that purpose, it is sealed with a heat seal or the like under the knowledge that it is necessary to set the timing of steam removal during the cooking by some method. An object of the present invention is to provide a food package for microwave cooking that can be easily applied to a package, can set the timing of the steam release as appropriate, and can notify by sound when cooking is completed.

[0007]

According to a first aspect of the present invention, there is provided a food package for cooking microwave oven according to the first aspect of the present invention. It features a whistle mechanism that generates sound by rapid passage. When the food using the food package for cooking microwave oven according to claim 1 is set and cooked in a microwave oven, the food is heated and the whistle mechanism emits a sound due to rapid passage of steam generated in the package. It can be issued to notify that cooking is completed.

[0008] Next, the whistle mechanism has at least an outer peripheral edge of the heat seal portion so that the steam generated in the package by the microwave heating reaches a predetermined steam pressure so that the steam can pass therethrough. It is characterized in that the part is provided inside from the sealed part, and when the food is sealed and heated in a microwave oven as it is, when the heat and pressure of the steam generated from the food reaches a predetermined level Then, the heat-sealed outer peripheral portion outside the portion where the whistle mechanism is installed is peeled off, and the whistle mechanism is opened to communicate with the inside and outside of the container. Then, when the steam rapidly passes through the whistle mechanism, the reed vibrates and resonates to make a sound, thereby notifying the cooking completion time.

According to a third aspect of the present invention, when the whistle mechanism comprises a flaky reed, and the reed is fixed to the seal portion only at both ends thereof, the steam rapidly moves the whistle mechanism. When passing, the reed vibrates and resonates, and a sound is heard, so that the completion time of cooking can be notified. Further, the whistle mechanism is held by a support, and the support is sealed by a seal portion, so that the whistle mechanism can be stably held by the support, and It is easier to install a whistle mechanism on the wing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view of the package of the present invention, FIG. 2 is a partially enlarged plan view of an installation portion of the whistle mechanism of FIG. 1, FIG. 3 is a vertical sectional view taken along line III-III of FIG.
FIG. 4 is a vertical sectional view taken along line IV-IV. 5 and 6 are cross-sectional views of the same portions as those in FIG. 4 for explaining the operation of the whistle mechanism.

Reference numeral A denotes a package according to the present invention, which is a tray-shaped container composed of a container body 1 having a flange at the periphery of an opening and a lid 2 heat-sealed to the flange.
The package A is not limited to the above configuration, and may be a bag sealed by heat sealing. The material of the package is a material having microwave permeability and heat resistance, such as paper, unstretched polypropylene (CP
P), high density polyethylene (HDPE), polyethylene terephthalate (PET), polycarbonate (P
C), a synthetic resin such as polymethylpentene (PMP) or the like, a laminate thereof, or a laminate of these and a metal foil such as aluminum (AL). The heat-sealed portion 3 of the package is formed by heat-sealing the inner surface of the laminate, and the heat-sealed portion 3 is provided with a whistle mechanism composed of a lead 4 therebetween.

The lead 4 has a flaky non-seal portion 4a which is vibrated and vibrated by the passage of steam, which will be described later, and is heat-sealed and fixed to the heat seal portion 3 at both ends 4b. An outer peripheral edge portion 5 located at an outer peripheral position from the portion 4a is provided with heat sealing so as to be connected to the heat sealing portion 3. In the present invention, the timing of steam release can be set by adjusting the seal width b and / or the seal strength of the outer peripheral edge portion 5. The material of the lead 4 is heat resistance against heat sealing,
It has non-heat-sealing properties and flexibility for vibrating due to rapid passage of steam. For example, fluoroplastics such as tetrafluoroethylene (PTFE) and fluorinated ethylene polypropylene copolymer (FEP) are preferably used. One or more small holes (not shown) in part 4b
Is formed, heat sealing at both end portions 4b can be facilitated.

Further, the whistle mechanism is not limited to the above-mentioned structure. For example, as shown in FIG. 7, the lead 4 may be fixed by a support 7 so as to form a resonance space 6, in which case, The whistle mechanism can also be installed by sandwiching the outer surface of the support with a heat seal portion and heat sealing. Examples of the material of the support include polypropylene (PP) and high-density polyethylene (HDP) having heat resistance and heat sealing properties.
E), polymethylpentene (PMP) or polyethylene terephthalate (PET) is preferred.

When the package is implemented in a bag,
The sealing form for sealing is not limited, for example, when the upper and lower portions of the cylindrical film are sealed and sealed, and when two flat films are stacked to seal the periphery thereof. As the seal portion, in addition to the heat seal, a seal by internal heating using high frequency, ultrasonic wave, microwave, or the like, or a seal with an adhesive that does not affect food hygiene can be used.

When the food is sealed and heated in a microwave oven using the package according to the present invention, when the heat and pressure of the steam generated from the food reach a predetermined level, the whistle mechanism is installed. The outer heat-sealed outer peripheral edge 5 is peeled off, and the whistle mechanism is opened to communicate with the inside and outside of the container (see FIGS. 5 and 6). When the whistle mechanism is composed of the flaky reed 4, and when the reed 4 is fixed to the seal portion only at both ends, when the water vapor rapidly passes through the whistle mechanism, the reed vibrates and resonates. Sounds and informs of the completion time of cooking.

Further, when the whistle mechanism is held by the support 7 and the support 7 is sealed by the seal portion,
The whistle mechanism can be stably held by the support 7, and the installation of the whistle mechanism on the package is facilitated.

[0017]

As described above, according to the package of the present invention, during heating, the steam generated from the food can be kept in a trapped state, and the heating effect of the steam can be effectively used. The timing of the steam release to be performed can be set as appropriate, and the completion timing can be notified by sound by setting the timing to the completion of cooking. Further, since the whistle mechanism is installed by a heat seal or the like, the barrier property of the package itself is also ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged plan view of a whistle mechanism shown in FIG. 1;

FIG. 3 is a vertical sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a vertical sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a view showing III- of FIG.
FIG. 3 is a vertical sectional view taken along line III.

FIG. 6 is a diagram illustrating the state of IV-IV in FIG.
It is a line longitudinal cross-sectional view.

FIG. 7 is a longitudinal sectional view of a whistle mechanism according to another embodiment.

[Explanation of symbols]

 A Package 1 Package body 2 Lid 3 Heat seal part 4 Lead as whistle mechanism 4a Non-seal part 4b Both ends 5 Container main body outer peripheral edge 6 Resonance space 7 Support

[Procedure amendment]

[Submission date] February 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

SUMMARY OF THE INVENTION A microwave oven according to the present invention.
The food package for cooking is heat-sealed as described in claim 1.
Microwave heating in a package sealed with
The vapor generated inside the package has reached the predetermined vapor pressure
A whistle mechanism is installed between the seals so that steam can sometimes pass through.
It is characterized in that it is provided in the non-seal part of the beam ,
If the food is sealed and heated in a microwave oven as it is, when the heat and pressure of the water vapor generated from the food reach a predetermined level, the steam is more rapidly discharged from the unsealed portion where the whistle mechanism is installed. And the whistle mechanism is opened to communicate with the inside and outside of the container. Then, when the steam rapidly passes through the whistle mechanism , a sound is made to notify the cooking completion time.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, in the case where the whistle mechanism is formed of a flaky lead, and the lead is fixed to the seal portion only at both ends thereof, the steam rapidly moves the whistle mechanism. When passing, the reed vibrates and resonates, and a sound is heard, so that the completion time of cooking can be notified. Further claims
The whistle mechanism is characterized in that the whistle mechanism is supported by a non-seal portion having a resonance space and is supported between the seal portions as in FIG. It can be stably held by the support, and it is easy to install the whistle mechanism on the package.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

[0012] lead 4 has a non-seal portion 4a Could flaky vibrated by vapor passage to be described later, are heat-sealed with heat-sealed portion in the heat-sealed portion 3 at its both end portions 4b
3 and at least the non-seal portion 4a
The outer peripheral edge portion 5 at the outer peripheral position is provided with heat sealing so as to be connected to the heat sealing portion 3. In the present invention, the timing of steam release can be set by adjusting the seal width b and / or the seal strength of the outer peripheral edge portion 5. The material of the lead 4 has heat resistance to heat sealing, non-heat sealing property, and flexibility to vibrate due to rapid passage of steam. For example, tetrafluoroethylene (PTFE), fluorinated ethylene polypropylene copolymer ( Fluoroplastics such as FEP) are preferably used, and one or more small holes (not shown) are formed at both ends 4b so that both ends 4b are formed.
In this case, heat sealing can be easily performed.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Further, the whistle mechanism is not limited to the above-described structure. For example, as shown in FIG. 7, the lead 4 may be formed as a non-seal portion fixed by a support 7 so as to form a resonance space 6, In that case, the whistle mechanism can be installed by sandwiching the outer surface of the support with a heat seal portion and heat sealing. As the material of the support, polypropylene (PP), high-density polyethylene (HDPE), polymethylpentene (PMP) having heat resistance and heat sealing properties are used.
Alternatively, polyethylene terephthalate (PET) or the like is preferable.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

When the food is sealed and heated in a microwave oven using the package according to the present invention, when the heat and pressure of the steam generated from the food reach a predetermined level, a non-sealing device provided with a whistle mechanism is provided. the outer peripheral edge portion 5 which is outside of the heat seal is detached from the part, whistle mechanism is opened in a state communicating with the container and out (see FIGS. 5 and 6). When the whistle mechanism is composed of the flaky reed 4, and when the reed 4 is fixed to the seal portion only at both ends, when the water vapor rapidly passes through the whistle mechanism, the reed vibrates and resonates. Sounds and informs of the completion time of cooking.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Further, the non-seal in which the whistle mechanism has a resonance space
The whistle mechanism is supported by the support 7 when the support 7 is held between the seal portions.
And the whistle mechanism can be easily installed on the package.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

[0017]

As described above, according to the package of the present invention, during heating, the steam generated from the food can be kept in a trapped state, and the heating effect of the steam can be effectively used. The timing of the steam release to be performed can be set as appropriate, and the completion timing can be notified by sound by setting the timing to the completion of cooking. Further whistle mechanism by heat sealing or the like
The whistle mechanism is installed between the
It can be held stably and the barrier property of the package itself is secured.

Claims (4)

[Claims] 1. A food package for microwave cooking, wherein a whistle mechanism for generating a sound by a rapid passage of steam is provided in a part of the sealed portion in a package sealed by a heat seal or the like. 2. A heat seal portion in which at least the outer peripheral edge portion of the whistle mechanism is sealed so that the steam generated in the package by microwave heating reaches a predetermined steam pressure so that the steam can pass therethrough. The food package for microwave cooking according to claim 1, wherein the package is provided further inside. 3. The food package for microwave oven cooking according to claim 1, wherein the whistle mechanism comprises a flaky reed, and the reed is fixed to the seal portion only at both ends thereof. 4. The food package for microwave cooking according to claim 1, wherein the whistle mechanism is held by a support, and the support is sealed by a seal portion.