Container opening structure, container provide with the opening structure and method of manufacturing the opening structure

Abstract

An opening structure of a container easily performs the opening and the resealing. The container continuously and integrally forms a cap portion and a pouring portion. Due to a radial deformation of an easy-to-break portion which is present in a boundary between the cap portion and the pouring portion, the easy-to-break portion is broken and hence the cap portion and the pouring portion are separated, thus opening the container. A manufacturing method for the novel container is also provided.

Description

TECHNICAL FIELD [0001] The present invention relates to an opening structure of a container, a container provided with the opening structure and a method of manufacturing the opening structure, and more particularly to an opening structure of a container such as a juice can, a beer can, a carbonated drink can, a coffer drink can, a tea drink can, an edible oil can, a seasoning can or the like, which exhibits the excellent opening property and enables easy opening and closing thereof, a container provided with such an opening structure, and a method of manufacturing the opening structure. BACKGROUND ART [0002] Conventionally, as the above-mentioned hermetically sealed container such as the juice can, the beer can, the carbonated drink can, the coffer drink can, the tea drink can, the edible oil can, the seasoning can or the like, a container which seams an easily openable lid to an opening end portion of a container body has been popularly used. An easy-to-break portion (scores) whic...

AI Technical Summary

Benefits of technology

[0014] The present invention has been made to solve the above-mentioned drawbacks and it is an object of the present invention to provide an opening structure of a container which exhibits the excellent opening ability which allows easy opening and resealing, a container provided with the opening structure, and a manufacturing method of the opening structure.

[0015] Inventors of the present invention have made extensive studies to obtain the above-mentioned object and have arrived at the present invention based on a finding that the opening property can be enhanced by adopting the opening structure of a container which is openable due to a radial deformation of an easy-to-break portion.

[0035] According to the opening structure of a container of the present invention, the opening structure can be easily manufactured. Further, the opening structure can achieve the excellent recycle property, the excellent prevention of removal of the opening structure during the transportation, the excellent prevention of an unauthorized opening and the excellent opening property and can easily perform the opening and the resealing.

Problems solved by technology

With respect to such a conventional hermetically sealed container, however, when some beverage remains in the container after drinking, it is unable to reseal the opening portion and hence, there has been a drawback that it requires time and efforts to throw away the remaining beverage or to move the beverage in the container to a cup or the like and to preserve the beverage in a refrigerator.

Alternatively, there has been a drawback that a foreign substance adheres to the easy-to-open lid thus easily giving rise to an unhygienic situation.

However, with respect to the container described in patent document 1, the resin-made cap is constituted separately from the container body and hence, there arises a drawback that steps for manufacturing the container become cumbersome thus worsening the productivity.

Further, the metal-made can container and the resin-made cap are made of materials different from each other and hence, there arises a drawback that it is necessary to separate them in discarding the container thus giving rise to a drawback that the discarding operation is cumbersome and exhibits the poor recycling property.

Further, there exists a drawback that since the cap exhibits the poor durability during use thereof, also due to vibrations and impacts which the container receives during the transportation before use or the like, the cap may be removed from the container body.

Further, there exists a drawback that since the easy-to-break portion is opened by pushing the push button of the cap from above with the finger at the time of opening the pouring portion, it is difficult for an infant, an aged person or the like who lacks the strength and shows an unsteady hand motion to open the pouring portion and, at the same time, since a user cannot confirm an opened state until the user removes the cap, the container lacks the reliability of opening.

Still further, there exists a drawback that, at the time of resealing, foreign substances such as dust or debris stay or are adhered to a joint portion between the cap portion and the pouring portion and hence, the container becomes unhygienic.

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