Cap and container with cap

Abstract

Provided are a cap (1) which can improve the sealing property of a container and which is suitable for use in the case where the internal pressure of the container is high such as the case where the content of the container is carbonated beverage, and a container (2) with the cap. The cap comprises a cap body (4) which has a top wall (6) and a skirt wall (7) drooping from the outer periphery of the top wall (6) and in which a female screw (9) which is fit to a male screw (10) of an opening (3) of the container is formed in the skirt wall (7), and a composite resin packing (5) for sealing the opening (3) of the container. The packing (5) comprises a top plate (17) which comes into contact with the leading end portion of the opening (3) of the container and with which the end portion is covered, and a circular inner foot (18) which droops from the top plate (17) and which is adhered to the inner periphery surface of the opening (3) of the container. Further, a circular bending portion (19) which bends downward relative to the top plate (17) and with the inner periphery surface of which the outer periphery surface of the opening (3) of the container is covered is provided in continuous with the outer periphery edge of the top plate (17). Further, the cap body (4) comprises an urging portion (21) for urging the outer periphery surface of the bending portion (19) of the packing (5)in a closed state and the bending portion (19) urged is elastically transformed to be pushed to the outer periphery surface of the opening (3) of the container.

Description

technical field [0001] The present invention relates to a cap and a container provided with the cap. The cap is attached, for example, to the mouth of a container for storing various beverages (regardless of the presence or absence of carbonic acid gas, the presence or absence of alcohol, etc.), and is formed to include a cap main body and a sealing cap. Two-piece construction of the packing. Background technique [0002] As a conventional two-piece structure cover, for example, there is a cover disclosed in Patent Document 1, Figure 7 The cover is shown in . That is, the cover is composed of a cover main body 4 and a packing 5 . In addition, the cap is provided with a cap main body 4 having a top wall 6 and a skirt wall 7 hanging down from the outer peripheral portion of the top wall 6, and a skirt wall 7 is formed on the skirt wall 7 to be connected to the mouth portion 3 of the container. thread 10 threaded internal thread 9; synthetic resin gasket 5, which seals the c...

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned conventional cap, for example, when the wall thickness of the top wall 6 of the cap main body 4 is thick and no swelling occurs, the bent portion 19 is not pressed against the outer peripheral surface of the container mouth portion 3 3c, there is a possibility of said airtight leakage caused by the internal pressure of the container 2

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