Container for microwave oven and package for microwave oven

Patent metadata

Field	Value
Publication number	US-10233009-B2
Application number	US-201415122804-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Mar 28, 2014
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

The objective is to provide a container for microwave oven and a package for microwave oven in which a clearance which is formed between a flanged portion and a lid material and a content may enter is made narrower while maintaining automatic vapor discharge function.

First claim

The invention claimed is:

1. A container for a microwave oven, comprising:
a concave main body configured to receive a content therein and having an opening,
an annularly flanged portion formed at the opening in an upper end of the concave main body, and
a rib-shaped thermal fusion portion formed over a whole circumference of a top surface of the flanged portion to be thermally fused to a film-shaped lid material for closing the opening,
wherein the thermal fusion portion is provided with
first and second opening portions that are each approximately V-shaped such that each opening portion projects from the opening side toward an outer periphery of the flanged portion in a plan view;
a vapor discharge portion that is approximately V-shaped such that it projects from the outer periphery side toward the opening side in a plan view; and
an annular portion formed along an annular reference line, which is similar to a shape of an inner periphery of the opening, except for the opening portions and the vapor discharge portion,

wherein a pair of end portions of the vapor discharge portion located at the outer periphery side is located closer to the outer periphery than the reference line in an across-the-width direction of the flanged portion, and connected through a pair of inclined portions to an end portion of the annular portion located at both sides of the vapor discharged portion;
wherein the annular portion is disposed at locations less than 50% of a width of the flanged portion from the opening;
wherein each of the pair of the inclined portions together with a part of the vapor discharge portion forms an approximately V-shape;
wherein the flanged portion has a first enlarged portion and a second enlarged portion which is wider than the first enlarged portion;
wherein, in the first or second enlarged portion, the first and second opening portions are formed adjacent to first and second sides, respectively, of the vapor discharge portion, the vapor discharge portion being formed in the same enlarged portion as the first and second opening portions; and
wherein, in the first or second enlarged portion, grasping portions, which a user can grasp, are formed on outer sides of the first and second opening portions, the outer sides being opposite to the vapor discharge portion.

2. The container for the microwave oven according to claim 1 ,
wherein the vapor discharge portion at the pair of end portions is disposed at location of 50% or above of the width of the flanged portion from the opening.

3. The container for the microwave oven according to claim 1 ,
wherein the vapor discharge portion at the end portion located at the opening side is disposed at location which the reference line passes.

4. The container for the microwave oven according to claim 1 ,
wherein the annular portion lies between the opening portion and the vapor discharge portion.

5. The container for the microwave oven according to claim 1 ,
wherein the main body has an approximately circular or oval shape at the opening, and
wherein the second enlarged portion is formed as a grasping portion.

6. The container for the microwave oven according to claim 1 ,
wherein the main body has an approximately rectangular shape at the opening, and
wherein the second enlarged portion is formed as a corner portion.

7. The container for the microwave oven according to claim 1 ,
wherein the annular portion is located close to the opening.

8. The container for the microwave oven according to claim 1 ,
wherein the main body has a plurality of receiving portions configured to receive the content therein, and
wherein a plurality of the vapor discharge portions is formed corresponding to the plurality of receiving portions.

9. The container for the microwave oven according to claim 8 ,
wherein the concave main body comprises a partition wall defining adjacent receiving portions, and
wherein the thermal fusion portion further comprises a connecting portion which is provided on the top of the partition wall and which connects opposite portions of the annular portion such that each adjacent receiving portion is able to be sealed.

10. The container for the microwave oven according to claim 9 ,
wherein the plurality of receiving portions is defined by two receiving portions, the flanged portion comprises two grasping portions situated opposite to each other with the two receiving portions situated between the grasping portions, and each receiving portion is provided with a multifunctional portion situated in the grasping portion.

11. The container for the microwave oven according to claim 10 ,
wherein the annular portion has boundary portions which are connected to the connecting portion and the boundary portions branch off so as to closely follow along the opening of each receiving portion.

12. The container for the microwave oven according to claim 9 ,
wherein each opening of the two receiving portions has a substantially semicircular shape or substantially semielliptical shape in a plan view.

13. The container for the microwave oven according to claim 1 ,
wherein inflection points are formed between the annular portion and the inclined portions in a plan view.

14. The container for the microwave oven according to claim 13 ,
wherein the inflection points are disposed at locations less than 50% of a width of the flanged portion from the opening.

15. The container for the microwave oven according to claim 1 ,
wherein an opening angle formed between the opening portion and the vapor discharge portion is less than 90 degrees.

16. The container for the microwave oven according to claim 1 ,
wherein an angle formed by the vapor discharge portion is less than 90 degrees.

17. The container for the microwave oven according to claim 1 , wherein the first opening portion is connected directly through a first inflection portion to a first end portion of the annular portion and the second opening portion is connected directly through a second inflection portion to a second end portion of the annular portion.

18. A package for a microwave oven by which a content is hermetically sealed and stored, comprising a film-shaped lid material, and a container for the microwave oven hermetically sealed by the film-shaped lid material, the container for the microwave oven comprising:
a concave main body configured to receive a content therein and having an opening,
an annularly flanged portion formed at the opening in an upper end of the concave main body, and
a rib-shaped thermal fusion portion formed over a whole circumference of a top surface of the flanged portion to be thermally fused to a film-shaped lid material for closing the opening,
wherein the thermal fusion portion is provided with
first and second opening portions that are each approximately V-shaped such that each opening portion projects from the opening side toward an outer periphery of the flanged portion in a plan view;
a vapor discharge portion that is approximately V-shaped such that it projects from the outer periphery side toward the opening side in a plan view; and
an annular portion formed along an annular reference line, which is similar to a shape of an inner periphery of the opening, except for the opening portions and the vapor discharge portion,

wherein a pair of end portions of the vapor discharge portion located at the outer periphery side is located closer to the outer periphery than the reference line in an across-the-width direction of the flanged portion, and connected through a pair of inclined

Assignees

• Kyoraku Co Ltd

Inventors

• Ishikawa Shinji
• YUHARA Tomohiro

Classifications

• B65D81/3453 Primary

  Rigid containers, e.g. trays, bottles, boxes, cups · CPC title

• B65D77/2036

  the seal having a stress concentrating portion · CPC title