JP2009292490A - Sheet lid for instant food container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new technology for an instant food container designed so that the sheet lid itself automatically can seal to cover the opening after only part of a sheet lid covering the opening of a container body is opened to pour a required quantity of hot water. <P>SOLUTION: The sheet lid 1 for the instant food container is formed from a laminated sheet made of a dead holdable, easily peelable material relative to the open edge 20 of the container body 2. A tongue-shaped pull tab 10 is extended. Thermally expandable stretchable empty space portions 3 are integrally provided in the form of layer on a top face, which is on the outside, and/or an underside, which is on the inside, over the range from the vicinity of the basal portion of the pull tab 10 to an area beyond which the lid is partially peeled continuously from the pull tab 10 at least when a hot water is poured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to a container for instant foods that can be cooked by simply pouring hot water. The container for instant foods and the field of producing instant foods using the same are of course transported, stored, assembled and installed. From the field of providing and selling the equipment and equipment necessary for the field, the field of providing materials, machinery and equipment, parts necessary for such materials, such as wood, stone, various fibers, plastics, various metal materials, etc. , The field of electronic components incorporated in them, the field of control-related equipment that integrates them, the field of various measuring instruments, the field of power equipment that moves the equipment and instruments, the field of electricity and oil as the energy and energy source Such as the field generally called industrial machinery, as well as testing and researching those facilities and equipment, and displaying and selling them The fields related to import / export, the results of their use, the equipment used to build them, the fields related to the collection and transportation of garbage generated by the operation of equipment, and the efficient recycling of these garbage In addition to the recycling field to be used, there are no new technical fields that are unrelated to the current unimaginable field.

(Points of interest)
Containers used for instant foods that can be easily cooked by pouring hot water such as snack noodles, soup, miso soup, etc. are generally foamed polystyrene injection molded or sheet molded products, polypropylene injection molded products, or a combination of a paper cup and a paper sleeve It has heat insulation and heat insulation properties by various materials, such as those made of, and it is set so as not to soften even when hot water is added, especially after pouring hot water and applying lids and drying For cup noodles and cups that need to be steamed for about 3 to 5 minutes, laminating a sheet layer and a film layer made of materials appropriately selected to have a dead hold property and an easy peel property It is assumed that a sheet lid that is a sheet body is mounted, and the sheet lid is, for example, a commercial product of instant food on the outer top surface of a paper base sheet. On the inner bottom surface, which is printed on the opposite side of the name and manufacturer, the thermoplastic film that provides moisture resistance, aluminum foil that secures dead hold, and easy peel that imparts easy peel properties The sealant is laminated and laminated.

    Such instant food in a container is a package for storage, transportation, display, and sale of the container itself, and also serves as a cooking container and tableware. As shown in a perspective view of a conventional instant food container, a pull tab 10 protruding from the outer peripheral edge of the seat lid 1 is picked, and only a part of the pull-up tab 10 is peeled off to a position where the hot water can be poured safely. When opened, the dead hold property is secured by plastic deformation of the aluminum foil laminated on the sheet lid 1, and as shown in FIG. 13, the sheet lid 1 is opened so that it does not return to the sealing position without permission. The posture is maintained while the portion is warped, and hot water can be poured safely into the container 2.

When the dried food in the container 2 is steamed for several minutes after the pouring of hot water, it is necessary to return the sheet lid 1 to the sealed state again. It is desirable that the dead hold property is sufficiently exhibited by plastic deformation of the laminated aluminum foil.
However, the sheet lid 1 formed by laminating a plurality of types of materials such as paper, synthetic resin film, and aluminum foil suffers from a difference in thermal expansion coefficient of each material under the condition of being heated from hot water. As shown in Fig. 2, the opened area is opened up in a flipped shape, and there is a disadvantage that sufficient steaming cooking is not possible.Consequently, consumers who are concerned about the stuffiness of dried food and cooking more quickly The finished people have devised so that a thick book, tableware, etc. can be put on the sheet lid 1 after opening to keep it tightly sealed. The center of gravity moved and became unstable, and there was a disadvantage that the risk of accidentally overturning the container 2 containing hot water increased.

(Conventional technology)
Considering such a situation, for example, as represented by what is proposed in Patent Document 1 (1) below, once peeled off between the opening edge of the cup noodle container and the adhesive surface of the sheet lid In addition, a member suitable for re-adhesion is provided at each interface, and the bottom of the bowl with hot water poured into the cup noodle container is pressed for a moment so that it is ironed from the top of the sheet lid closed like a lid. A hot water supply opening is made near the center of the sheet lid of the cup noodle container, as shown in the same patent document (2), which can be sealed again by heating and welding. After finishing the hot water supply port, a sheet small lid dedicated to the hot water port with an adhesive layer formed on the lower surface of the outer peripheral edge is attached, or as in Patent Document (3) Between the cup noodle container opening and the sheet lid, A seal consisting viewed alignment provided, such as those capable suit closed again closed shape after once opened is scattered.

However, as in the former, there is something that can be heated and re-welded like ironing by pressing the bottom of the case for a moment on the top of the sheet lid closed after pouring hot water into the cup noodle container When hot water is poured from a kettle pot, the advantage cannot be utilized, and there is a fatal disadvantage that the cup noodle container may be overturned if it is pushed and adjusted incorrectly. Yes, as shown in the second example, a hot water supply opening near the center of the seat lid has to be set narrow so that hot water is removed from the hot water supply opening. If it rides on the surface of the sheet lid, there is a possibility that it will be scattered around, and it is difficult to supply hot water safely. Further, as in the latter case, the cup noodle container opening and the sheet lid Between the concave and convex stripes If a part of the cup noodle container is provided with a seal made of a pair of seals and then poured in hot water into the cup noodle container and then closed again, it is attached along the vicinity of the opening edge of the cup noodle container. The seal strips and ridges of the seal must be pressed downwards with a certain amount of force applied. If the pressing operation is mistaken, fingers and hands will be placed in the hot water in the cup noodle container. There was a fatal defect that there was a risk of entering.
(1) Japanese Patent Laid-Open No. 11-222267 (2) Japanese Patent Laid-Open No. 2003-261183 (3) Japanese Utility Model Registration No. 3131762

(Awareness of problems)
As mentioned above, the sheet lids of various cup noodle containers that have been proposed in the past mistakenly apply force when trying to weld them using the function of pressing the bottom of the bowl and re-adhering them. If the cup noodle container is overturned or the hot water in the bowl overflows, the hot water is poured into the dedicated hot water outlet that is drilled near the center of the seat lid. There is a risk that hot water will splash on the upper surface of the sheet lid and scatter around if it comes off from the dedicated mouth, and the recesses and protrusions that can be closed by downward pressure between the cup noodle container opening and the sheet lid In the case of a seal provided in combination with a strip, the open sheet lid is closed again in a sealed manner, for example, a finger may accidentally enter the cup noodle container during the downward pressing operation. It is effective for hot water It is fatal that it is not suitable for children with inadequate judgment, elderly people who are difficult to adjust, and people with physical disabilities. There are drawbacks, and there is still no technology to solve these problems.

(Object of invention)
Therefore, the present invention can open only a part of the sheet lid with the opening of the container body and pour an appropriate amount of hot water, and then the sheet lid itself can be automatically sealed and formed into a lid shape. As a result of the long-term trial and error, many trial productions, and experiments, it was decided that the new instant food container technology could not be developed. The present invention has succeeded in realizing a sheet lid for an instant food container having a simple structure, and the configuration thereof will be described in detail below together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As can be clearly understood from the embodiments representing the present invention shown in the drawings, the sheet lid of the instant food container of the present invention basically comprises the following configuration.
That is, lamination with a sheet layer or a film layer made of a material having a size and shape corresponding to the opening edge plane of the container main body for injecting hot water for instant food and having a dead hold property and an easy peel property with respect to the opening edge It consists of a sheet body, and a tongue-like pull tab is extended and formed from a part of the outer peripheral edge, and either the outer top surface or the inner lower surface, or both the outer top surface and the inner lower surface On the other hand, the tension gap that is capable of being heated and expanded at 70 to 120 ° C. is in a range exceeding the vicinity of the pull tab base portion and at least the portion where the pull tab is continuously peeled off at the time of pouring hot water. It is the sheet | seat cover of the container for instant foods which makes the summary the structure made into the thing laminated | stacked and integrated over.

    When the sheet cover of the instant food container having this basic structure is shown in a different expression, it has a size and shape that matches the opening edge plane of the container body for injecting hot water for instant food, and the opening edge It consists of a laminated sheet body made of a sheet layer and a film layer made of a material having a dead hold property and an easy peel property, and a tongue-shaped pull tab is extended from a part of the outer peripheral edge, and the thickness of the sheet layer A tension gap that can be heated and expanded at 70 to 120 ° C. on the outer top surface or inner lower surface including the center is partially peeled continuously from the vicinity of the pull tab base to the pull tab at least when pouring hot water. It becomes the sheet cover of the container for instant foods which consists of the structure which shall be laminated | stacked and integrated over the range exceeding the area to become.

    As described above, according to the sheet lid of the instant food container of the present invention, until now, after opening a part of the sheet lid sealing the opening of the container body and pouring hot water, What can be re-adhered by pressing a heat source such as the bottom, what hot water is poured from the dedicated hot water opening that can be opened and closed near the center of the seat lid, or the opening edge of the cup noodle container and the seat lid Some have already been developed with a seal consisting of a combination of concave and convex stripes between them, but in either case, during the operation to re-seal the seat lid, the container body was overturned and hot water was added to the surroundings. Laminated sheet body made of a material that has a dead hold property and an easy peel property to the opening edge of the container body. Made of tongue For tension, with a pull tab extended and formed so that either the outer top surface or the inner lower surface, or both the outer top surface and the inner lower surface can be heated and expanded at 70 to 120 ° C. The gap is laminated and integrated from the vicinity of the base of the pull tab over at least the area where the pull tab is continuously peeled off at the time of pouring hot water, and the opening of the container body is sealed. After opening a part of the seat lid that has been stopped and pouring hot water, the tension gap that has received heat from the hot water quickly changes from a relaxed state to a tension state, and the seat lid is brought into a closed position. It is forcibly and automatically deformed and restored, and it has excellent characteristics that the user can safely re-seal the seat lid without any special operation. It is.

    In addition, a tension gap that can be heated and expanded at 70 to 120 ° C. on the outer top surface or inner lower surface including the thickness center of the sheet layer is continuous from the vicinity of the pull tab base to the pull tab at least when pouring hot water. In the same way, the sheet lid of the instant food container is laminated and integrated over the range that will be partially peeled off, and after pouring hot water into the container body, the tension for receiving the heat The gap quickly changes to a tensioned state, and the seat lid is forcibly and automatically formed into a closed posture, and the seat lid is resealed without requiring user operation. It will be a thing.

    Also, the tension in the diametrically opposite direction of the sheet lid is over the range where the tension gap extends from the vicinity of the pull tab base of the sheet lid to at least the portion where the pull tab is continuously peeled off at the time of pouring hot water. When formed in a continuous straight line, and a plurality of lines are arranged in parallel at a predetermined interval, each tension gap heated by the hot water supply into the container body is formed in the upper part of the seat lid. It becomes the shape of a plurality of mounted straight bars, and can exert a stronger sealing closing force.

    Furthermore, the tension in the diametrically opposite direction of the sheet lid is shown over a range where the tension gap extends from the vicinity of the pull tab base of the sheet lid to at least a portion where it is continuously separated from the pull tab when hot water is poured. Is formed into a flat plate shape or a flat ring shape that forcibly deforms and returns the entire circumference of the seat lid including the vicinity of the pull tab base portion to a flat plate posture, and ensures a higher hermetic closing performance. It will be a thing.

    And the tension gap is in the opposite direction of the sheet lid over the range where the gap between the pull tab and the base of the sheet lid is at least partially peeled continuously from the pull tab when hot water is poured. Even when it is formed in either a continuous planar U-shape or a discontinuous planar C-shape, the sheet lid is heated when heated with hot water, similar to the tension gap described above. The region where the part including the vicinity of the pull tab base is to be partially peeled can be automatically sealed and closeable.

    Also, the tension in the diametrically opposite direction of the sheet lid is over the range where the tension gap extends from the vicinity of the pull tab base of the sheet lid to at least the portion where the pull tab is continuously peeled off at the time of pouring hot water. It has a shape such as continuous flat letters, symbols, signs, patterns, etc., and is set so that it can be seen by projecting three-dimensionally to at least one of the sheet lid, outer top surface, or inner bottom surface during heating tension. What is to become is that the tension gap expanded by heating is not limited to the function of automatically closing and closing the seat lid, but the bulging shape of itself functions as a means of transmitting a visual image. It is possible to achieve an excellent effect that it is possible to realize a real product value.

    Furthermore, if an appropriate amount of air is sealed and sealed inside the tension gap, it will increase the weight and product safety, and the tension gap will be damaged by an accident. Even in the case of leakage, it is only necessary to leak the internal air, and the food in the main body container is not contaminated, and high safety can be ensured.

    And, an appropriate amount of air is sealed and sealed inside the tension gap, and the pressure strength is set lower than the other part of the tension gap in the appropriate position on the outer surface of the seat lid, If a safety valve mechanism is added that automatically generates cracks when the internal pressure increases more than necessary, a location with low atmospheric pressure, such as a location with high altitude, etc. Thus, even when the tension gap is abnormal or expanded, it is possible to avoid dangers such as rupture and to have a great effect of being able to be more excellent in safety.

In implementing the present invention having the configuration as described above, the best or desirable mode will be described.
The lid of the container body package containing the instant foods is stored in an easy-to-seal, hygienic and sealed manner so that it can be sealed and transported, displayed, sold, etc. It becomes a part, and the container can be opened with a dead hold function, and after pouring hot water into the container body, it can be sealed again, so that it has a dead hold property and an easy peel property. It is composed of a laminated sheet body made of appropriately selected material sheet layers and film layers, and a pull tab is extended and formed from a part of the outer peripheral edge, and either the outer top surface or the inner lower surface, or the outer side On either one of the top surface and the inner bottom surface, a tension gap that can be heated and expanded at 70 to 120 ° C., from the vicinity of the pull tab base, At least when the hot water is poured, it must be laminated and integrated over a range that will be partly peeled off continuously on the same pull tab, as shown in the examples below. Various information, images, patterns, etc. related to instant food names, signs, cooking methods, manufacturers, etc. were printed and displayed on the top of the base sheet made of synthetic resin, metal foil, or a composite material thereof. On the lower surface of the base sheet, an aluminum foil that enables plastic deformation, another plastic sheet layer, an easy peel sealant laminated on the lower surface of the plastic sheet layer, an easy peel film layer made of the other, etc. Can be laminated and integrally formed.
In addition, on the outer top surface or inner lower surface including the center of the sheet layer thickness, a tension gap portion that can be heated and expanded at 70 to 120 ° C. is continuous from the vicinity of the pull tab base to the pull tab at least when pouring hot water. Then, it can be laminated and integrated over a range that exceeds the area that will be partially peeled.

    The tension gap is in a relaxed state at room temperature and allows flexible opening and closing and plastic deformation of the seat lid. When hot water is poured into the container body and heated by the hot water in the container body, the seat lid Which is capable of automatically and forcibly deforming and maintaining a closed posture and generating a tension force, and is capable of generating either the outer top surface or the inner lower surface of the seat lid, or the outer top surface and the inner lower surface. On either one of them, the tension gap that is capable of being heated and expanded at 70 to 120 ° C. is partially peeled continuously from the vicinity of the pull tab base to the pull tab at least when pouring hot water. It can be laminated and integrated over a range exceeding the vicinity, or can be heated and expanded at 70 to 120 ° C. on the outer top surface or inner lower surface including the sheet layer thickness center. Whether the tension gap is made to be laminated and integrated from the vicinity of the base of the pull tab over at least the range where the pull tab is continuously peeled off at the time of pouring hot water. It must be set to either one, and the outer skin part composed of the film layer, the sheet layer, or the laminate thereof is reduced in plane or folded in plane at room temperature, and the thickness of the sheet lid Stacked on the outer top surface or inner lower surface of the inside or into a storage shape, and stretched and expanded to a cross-sectional shape that can exert sufficient tension so that the seat lid can be forcibly formed and returned to a flat plate posture in a heated and expanded state Or the expansion / expansion limit should be properly regulated so that sufficient tension can be obtained without expanding more than necessary. Good it is.

The tension gap should be filled with an expanded body such as a solid, liquid, or gas that expands when heated, and the expanded body is kept at a small volume at room temperature and the seat lid A flat and flexible sheet shape can be maintained, and when heated to 70 to 120 ° C., the volume expands to fulfill the function of allowing the heating and tensioning tube to be tensioned. More specifically, air, oxygen, dioxide Sanitary gas such as carbon, nitrogen gas, helium gas, or other inert gas, liquid that can be used as food such as water or edible oil, or resin that foams and hardens at 70 to 120 ° C Desirably, it is possible to ensure food safety, and there is no danger such as flammability, and it is good to use a tasteless and odorless fluid.
The tension gap does not expand below 70 ° C. because the flexibility of the sheet lid is lost if it becomes tensioned before pouring hot water into the container body and the opening operability is deteriorated. It should be set, and the heat source for tension is hot water under atmospheric pressure, and heating that exceeds 120 ° C is not required at all, and it is set to expand appropriately when heated to 70 to 120 ° C. Should.

    Further, the tension gap is formed when both the outer skin portion facing the outer top surface of the seat lid and the outer skin portion facing the inner lower surface of the seat lid are heated to 70 to 120 ° C. It can be set to have the property of expanding with the same thermal expansion coefficient, and the outer skin portion facing the outer top surface of the seat lid expands when heated to 70 to 120 ° C. It can be set to be made of a material having a property and a coefficient of thermal expansion larger than that of the outer skin portion facing the inner lower surface of the seat lid, and the expansion material can be sealed in the tension gap. Regardless of the presence or absence, the outer skin part itself can be made to be able to generate tension by heating, and in any case, when the tension gap is expanded, the inside is in a vacuum state or a negative pressure that cannot be expanded. Not in a state It must be assumed that the cormorants has been set.

And, as shown in the examples to be described later, the tension gap, from the vicinity of the pull tab base portion of the seat lid, over a range that exceeds at least the portion that will be continuously peeled to the pull tab at the time of hot water injection, The sheet lid can be set to have various shapes opposite to the diameter direction of the sheet lid, and can be in the shape of letters, symbols, signs, patterns, etc., and at least one of the front and back surfaces of the sheet lid when heated It can be set so as to project in three dimensions and be visible.
Further, the tension gap may be provided with a safety valve mechanism at a location where safety is ensured outside the top surface of the seat lid so as to prevent rupture and scattering of the outer skin part under low pressure such as altitude. it can.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

    1 is a cross-sectional view of the instant food container sheet lid of FIG. 1, a perspective view of the instant food container of FIG. 2, a plan view of the sheet lid of FIG. 3, a cross-sectional view of the sheet lid with a part of FIG. 5 is a cross-sectional view of the seat lid with further modifications, FIG. 6 is a cross-sectional view of the seat lid in which the tension gap is provided in a front-back manner, and FIG. 7 is a sheet lid provided with the disc-shaped tension gap. FIG. 8 is a cross-sectional view of a sheet lid in which the disc-shaped tension gaps in FIG. 8 are provided on the front and back surfaces, and a cross-sectional view of the sheet lid in which the disc-type tension gaps in FIG. FIG. 10 is a plan view of the seat lid provided with the annular tension gap, FIG. 11 is a plan view of the sheet lid provided with the flat C-shaped tension gap, and FIG. 12 is a plane U-shaped tension. The example shown in the plan view of the seat lid provided with the gap for the purpose is the dead-holding property for the opening edge 20 of the container body 2 and the -It consists of a laminated sheet body made of a peelable material, and is formed by extending and forming a tongue-like pull tab 10 and either the outer top surface or the inner lower surface, or both the outer top surface and the inner lower surface. On the other hand, the tension cavity 3 that can be heated and expanded is laminated and integrated from the vicinity of the base of the pull tab 10 over a range that is at least partially separated from the pull tab 10 when hot water 4 is injected. The typical example in the sheet | seat cover of the container for instant foods of this invention which was made into a thing is shown.

    As can be clearly understood from FIGS. 1 to 3, the sheet lid 1 of the instant food container of the present invention has a size corresponding to the plane of the opening edge 20 of the container body 2 for injecting hot water 4 for instant food. The shape is set, and an aluminum foil sheet layer (not shown) is laminated on the lower surface of the container body 2 of the base sheet made of paper or synthetic resin to secure the dead hold property for the opening edge 20, An easy peel sealant resin film layer is laminated on the lower surface of the aluminum foil sheet layer facing the container body 2 to ensure easy peelability between the opening edge 20 and A tongue-like pull tab 10 is extended and formed from a part of the outer peripheral edge.

    The sheet lid 1 is printed on the outer top surface of the base sheet with a product name, manufacturer, etc., and a transparent resin film layer made of a polypropylene resin film layer or a polyethylene resin film layer is laminated and integrated. A tension gap 3 in which a small amount of air 30 is hermetically sealed between the base sheet and the transparent resin film layer is continuous from the vicinity of the base of the pull tab 10 of the sheet lid 1 to the pull tab 10 at least when pouring hot water 4. Then, the sheet lid 1 is formed in a flat, linear shape opposite to the diametrically opposite side over a range exceeding the part that is to be partially peeled, and a total of three are arranged in parallel with a predetermined distance from each other. It is supposed to be.

    Further, as shown in FIG. 4, an aluminum foil sheet layer (not shown) is formed on the lower surface where the container body 2 of the sheet lid 1 base sheet is not provided, without providing the tension gap 3 on the outer top surface of the sheet lid 1. And laminating and integrating a resin film layer composed of a polypropylene resin film layer or a polyethylene resin film layer on the lower surface of the aluminum foil sheet layer, and a small amount between the substrate sheet and the resin film layer. The tension gap 3 in which the air 30 is hermetically sealed is from a vicinity of the base of the pull tab 10 of the seat lid 1 to a range that exceeds at least a portion where the pull tab 10 is continuously partially peeled when the hot water 4 is injected. In addition, the sheet lid 1 is formed in a plane and linear shape opposite to each other in the diametrical direction, and a total of three are arranged parallel to each other at a predetermined interval. It can be made by integrally laminating the easy peel sealant layer on the lower surface of Lum layer.

    As shown in FIG. 5, the tension gaps 3, 3,... Shown in FIGS. 1 and 2 are formed on both the outer top surface and the inner lower surface of the seat lid 1, respectively. In addition, as shown in FIG. 6, each of the tension gaps 3, 3,... Formed on both the outer top surface and the inner lower surface of the seat lid 1 is a base material of the seat lid 1. The sheet may be integrated in a vertically communicating manner through the sheet thickness center.

    Further, as shown in FIGS. 7 to 9, the tension gap 3 is formed in a flat disk shape, and either the outer top surface or the inner lower surface, or both the outer top surface and the inner lower surface. In addition to being able to be formed in either one, as shown in FIG. 10, it can be formed in a planar annular shape, and further, as shown in FIG. 11 and FIG. From the vicinity of the base of the pull tab 10, the sheet lid 1 has a planar U-shape that is continuously opposite to the diametrically opposite direction in a range that exceeds at least part of the pull tab 10 that is continuously peeled off when the hot water 4 is poured. Alternatively, it may be formed in any one of discontinuous planar C-shapes, and may be formed by combining parallel straight lines or planar crosses in the vicinity of the center.

The portion corresponding to the outer skin of the tension gaps 3, 3,... Is made of a resin film layer made of a polypropylene resin film layer or a polyethylene resin film layer. It is also possible to form from other film layers and the like, and when the container body 2 opening edge 20 has a plane ellipse shape, a plane rectangular shape, or other shapes, the tension gaps 3, 3, It is desirable that the planar shape of...
Further, although not shown, the pressure-resistant strength is higher than the other portions of the tension gaps 3, 3,... Thus, a safety valve mechanism can be formed in which the film thickness is set small.

(Operation of Example 1)
The sheet lid 1 of the instant food container of the present invention configured as described above has three tension gaps 3, 3, 3 as shown in FIG. 1 to FIG. The sheet lid 1 is formed in a linear shape that is continuous in the direction opposite to the diameter of the sheet lid 1 from the vicinity of 10 bases, and when cooking, the pull tab 10 is picked and a part of the sheet lid 1 is peeled off. 4, the tension gaps 3, 3, 3 that have received heat of 70 to 120 ° C. from the hot water 4 in the container body 2 are completely deformed by human hands due to the expansion of the internal air 30. Without the need, the bottom surface of the periphery of the pull tab 10 near the base of the pull tab 10 that is partially opened from the vicinity of the base of the pull tab 10 becomes a tension in the shape of a parallel straight bar extending in the opposite direction of the diameter of the seat lid 1. To the corresponding container body 2 opening edge 20 The thing to wear.

    As shown in FIG. 4, the three tension gaps 3, 3, 3 formed on the inner lower surface of the seat lid 1 are more efficient because the hot water 4 that serves as a heat source faces the side. It is heated and expanded, and as shown in FIG. 5, it is more powerful that three tension gaps 3, 3 and 3 are formed on both the outer top surface and the inner lower surface of the seat lid 1. In addition, even when some of the tension gaps 3 cause malfunctions, the upper and lower surfaces on the inner and outer sides complement each other, and a reliable sealing property can be obtained. 6, each of the tension gaps 3, 3, 3 is integrated through the sheet lid 1 base sheet, and the tension gaps are integrated with each other. The heat transfer of parts 3, 3, and 3 is remarkably efficient, enabling a more powerful and quick change to tension. .

    Further, as shown in FIG. 7 to FIG. 9, for the tension in the shape of a flat disk on either the outer top surface or the inner lower surface of the seat lid 1 or on either the outer top surface or the inner lower surface. In the case where the gap 3 is laminated and formed, when hot water is poured into the container main body 2, the tension can be made along the vicinity of the portion where the pull tab 10 of the sheet lid 1 is continuously peeled off. It is possible to obtain a higher degree of sealing compared to the gap 3 for use, and as shown in FIG. 10, even when the tension gap 3 is formed in a planar annular shape, the same sealing action is obtained.

    And as shown in FIG.11 and FIG.12, the planar U-shape which the sheet lid 1 diametrically opposite is continuous from the base vicinity of the sheet lid 1 pull tab 10, and a discontinuous planar C-shape etc. The tension gaps 3 and 3 are formed, and the tension gaps 3 and 3 such as parallel straight lines and plane crosses are formed near the center of the tension gaps 3 and 3. In addition to obtaining the same sealing action as 3, 3, and 3, various designs, marks, signs, etc. can be displayed and displayed three-dimensionally as ridges, convex surfaces, or combinations thereof. In addition, it is possible to realize much more various three-dimensional expressions by combining with displays such as printing and printing.

    In addition, although not shown in the drawings, a safety valve mechanism in which the film thickness is set smaller than the other portions is formed at appropriate positions on the outer surface of the seat lid 1 of the tension gaps 3, 3,. Can increase safety economically, such as when each tension gap 3, 3, ... is abnormally expanded under low pressure such as altitude or abnormally high temperature exceeding 120 ℃ In addition, the thin film layer portion corresponding to the safety valve mechanism is cracked prior to the other portions, and the internal air 30 is automatically released to safely decompress.

(Effect of Example 1)
In addition to the features described in the section of the effect of the present invention, the sheet lid 1 of the instant food container of Example 1 having the above-described configuration includes each tension gap as shown in FIG. 11 and FIG. The combination of parts 3, 3,... Can be used to express designs, marks, signs, etc. in a convex relief, and color expressions such as printing and printing have been added to this. The excellent effect that the sheet cover 1 having a high value can be realized is exhibited.

    In addition, a resin film layer that forms the tension gaps 3, 3,... Is provided with a thin film layer portion serving as a safety valve mechanism at each appropriate position on the top surface of the seat lid 1. Prior to other parts of the tension gaps 3, 3,... In other parts of each safety valve mechanism when abnormal expansion occurs in high altitude environments such as in airplanes or when heat exceeding 120 ° C is applied. As a result, cracks are generated, the internal air 30 is released at a low speed, the pressure is reduced, and explosions and hot water squirting can be prevented more reliably.

(Conclusion)
As described above, the sheet lid of the instant food container according to the present invention can achieve the intended purpose uniformly by its novel configuration, and is easy to manufacture, and has a dead hold property after hot water supply from before. Compared to various types of instant food containers, it is lighter and cheaper and can be made much more economical, and is excellent in mass productivity. It automatically closes without requiring manual operation, and until now, the container body has been inadvertently overturned or fingered during the operation of sealing and holding the sheet lid after pouring hot water. Although there was a high risk of rushing into the container, it can be greatly improved by significantly improving such a risk, so that it can be steamed well as well as in the instant food and supermarket industries. Key As well as consumers who are concerned about this, it is also highly appreciated in ordinary households including children and elderly people who have difficulty in complex cooking operations of conventional seat lids, and people with physical disabilities, etc. It is expected to be used and spread widely.

The drawings show some typical embodiments embodying the technical idea of the seat lid of the instant food container of the present invention.
It is sectional drawing which shows a sheet | seat cover. It is a perspective view which shows the container for instant foods. It is a top view which shows a sheet | seat cover. It is sectional drawing which shows the sheet | seat cover which formed the clearance gap part in the lower surface. It is sectional drawing which shows the sheet | seat lid | cover which formed the space | gap part for tension in the front and back. It is sectional drawing which shows the sheet | seat lid | cover which formed the space | gap part for tension penetrated in the front and back. It is a top view which shows the sheet | seat lid | cover which provided the disk-shaped tension | gap space | gap part. It is sectional drawing which shows the sheet | seat cover which provided the discoid tension | tensile_strength space | gap part in the front and back. It is sectional drawing which shows the sheet | seat lid | cover which provided the disk-shaped tension | tensile_strength space | gap part in front and back penetration. It is a top view which shows the sheet | seat cover which provided the space | gap part for annular | circular type tension. It is a top view which shows the sheet | seat cover which provided the plane C-shaped tension | gap space | gap part. It is a top view which shows the sheet | seat cover which provided the plane U-shaped tension | gap space | gap part. It is a perspective view which shows the conventional container for instant foods.

Explanation of symbols

1 Seat cover
10 Pull tab 2 Container body
20 Open edge 3 Tension gap
30 Same air 4 Hot water

Claims (8)

    Laminated sheet body made of a sheet layer or a film layer made of a material having a size and shape corresponding to the opening edge plane of the container main body for injecting hot water for instant food and having a dead hold property and an easy peel property with respect to the opening edge A tongue tab-like pull tab is extended and formed from a part of the outer peripheral edge, and either the outer top surface or the inner lower surface, or either the outer top surface or the inner lower surface. In addition, the tension gap that is capable of being heated and expanded at 70 to 120 ° C. extends from the vicinity of the pull tab base to a range that exceeds at least a portion where the pull tab is continuously peeled off at the time of pouring hot water. A sheet lid for an instant food container, characterized in that it is laminated and integrated.     Laminated sheet body made of a sheet layer or a film layer made of a material having a size and shape corresponding to the opening edge plane of the container main body for injecting hot water for instant food and having a dead hold property and an easy peel property with respect to the opening edge A tongue tab-like pull tab is extended and formed from a part of the outer peripheral edge, and can be heated and expanded at 70 to 120 ° C. on the outer top surface or inner lower surface including the center of the sheet layer thickness. The tension gap was made to be laminated and integrated from the vicinity of the base of the pull tab over at least a range that would be partly peeled off continuously from the pull tab at the time of hot water injection. A sheet lid for an instant food container.     The tension gap is continuous from the vicinity of the pull tab base of the seat lid, at least across the range that will be partially peeled off continuously at the same time when the hot water is poured. The sheet lid of the container for instant food according to claim 1 or 2, wherein the sheet lid is formed in a straight line, and a plurality of them are arranged in parallel at a predetermined interval.     The tension gap is continuous from the vicinity of the pull tab base of the seat lid, at least across the range that will be partially peeled off continuously at the same time when the hot water is poured. The sheet lid of the container for instant food according to claim 1 or 2, wherein the sheet lid is formed in a flat plate shape or a flat ring shape.     The tension gap is continuous from the vicinity of the pull tab base of the seat lid, at least across the range that will be partially peeled off continuously at the same time when the hot water is poured. 3. A sheet lid for an instant food container according to claim 1, wherein the sheet lid is formed in one of a planar U-shape and a discontinuous planar C-shape.     The tension gap is continuous from the vicinity of the pull tab base of the seat lid, at least across the range that will be partially peeled off continuously at the same time when the hot water is poured. Forms such as flat letters, symbols, signs, patterns, etc., which are set so that they can be projected and projected three-dimensionally to at least one of the sheet lid, outer top surface or inner bottom surface when heated and tensioned The sheet lid of the container for instant food according to claim 1 or 2.     7. The instant food container cover according to claim 1, wherein the tension gap is formed by sealing and enclosing an appropriate amount of air therein. The tension gap is sealed and sealed with an appropriate amount of air inside, and the pressure strength is set lower than the other parts of the tension gap at the appropriate position on the outer surface of the seat lid. The instant food container according to any one of claims 1 to 6, further comprising a safety valve mechanism that automatically generates a crack when the internal pressure increases more than necessary. Sheet lid.

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