Sealing head and container sealed using the same

Abstract

The present invention provides a beverage container, a sealing head used for sealing the beverage container, and a container sealed using the sealing head, wherein the separated sealing portion of the beverage container is prone to breakage due to the internal pressure of the container main body. Stress from the inner side in the radial direction separates, and it is difficult to separate due to stress acting from the outside during circulation. In order to weld the lid (9) on the opening of the container body containing the contents, there is a pressing end (31A) for pressing the lid (9) to the flange (5) of the opening, ( 31B), at least a part of the pressing ends (31A), (31B) is used as a sealing head, and the sealing head is formed in a section between the radially inner portion (Q1) and the radially outer portion (Q2) of the opening. The uneven convex portion (31A) having different curvature radii of the contour.

Description

technical field [0001] The present invention relates to a sealing head for welding a lid to an opening of a container body containing contents, and to a container sealed using the sealing head. Background technique [0002] As prior art document information related to such a sealing head and a container, there is Patent Document 1 shown below. The invention described in this patent document 1 is characterized in that it uses a lid body that does not contain aluminum foil, and when sealing the container body with the lid body, it uses a general seal that has a ring-shaped pressing end corresponding to the shape of the opening of the container body. head. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-136388 (paragraph 0015, image 3 ) [0006] The problem to be solved by the invention [0007] However, in the sealing structure formed by the sealing head described in Patent Document 1, of cou...

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Problems solved by technology

[0007] However, in the sealing structure formed by the sealing head described in Patent Document 1, of course, the lower limit of the pressure required to lift the lid from the inside of the container to open the seal is different from that of lifting the lid from the outside of the container. The lower limit values ​​of the pressure required for unsealing are almost equal to each other. Although the lid body cannot be easily unsealed due to the stress applied from the outside of the container during transportation, storage, etc., for example, it cannot cause pressure rises in the container. Highly functional sealing structure compared to conventional ones, such as relatively smooth opening of the lid

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