Longitudinally expandable plastic bottle, and method and apparatus for manufacturing the same

Abstract

There is proposed and provided a plastic bottle the longitudinal dimension (height) of which is decreased substantially when the bottle is manufactured, as compared with the time when the bottle is filled with contents, a method for manufacturing the plastic bottle, and an apparatus for manufacturing the plastic bottle. When the bottle is manufactured, the bottle being constructed so that a longitudinal part or the whole of the bottle, except a mouth portion at the upper end, has a bellows shape in the horizontal direction, the bottle is molded in a state of having substantially smaller volume and height than the volume and height at the time when the bottle is filled with contents, and when an empty portion is formed in the bottle by an operation of drinking up the contents, the bottle can be made again in a state of having substantially smaller volume and height than the volume and height at the time when the bottle has been filled with contents.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a plastic bottle having a different height between a case where it is filled with a liquid such as juice or mineral water and a case where it is empty, a method for manufacturing the plastic bottle, which mainly uses a blow molding process called stretch blow or injection blow or generally called PET resin blow, and an apparatus for manufacturing the plastic bottle. [0003] 2. Description of the Related Art [0004] In recent years, the volume of production of synthetic resin bottles has become enormous. [0005] A serous drawback of the synthetic resin bottle is that when juice or mineral water in the bottle is drunk up and the bottle is thrown away, the bottle remains in the original shape, and when the emptied bottle is thrown away in a trash container, the trash container is filled soon with bottles because the state is as if air is thrown away in the trash container, and eventually b...

AI Technical Summary

Benefits of technology

[0019] Generally, an object of the present invention is to propose and provide a plastic bottle the longitudinal dimension (height) of which is decreased substantially when the bottle is manufactured, as compared with the time when the bottle is filled with contents, a method for manufacturing the plastic bottle, and an apparatus for manufacturing the plastic bottle.

Problems solved by technology

A serous drawback of the synthetic resin bottle is that when juice or mineral water in the bottle is drunk up and the bottle is thrown away, the bottle remains in the original shape, and when the emptied bottle is thrown away in a trash container, the trash container is filled soon with bottles because the state is as if air is thrown away in the trash container, and eventually bottles are thrown away on the road, which harms the living environment.

In addition, the recovery costs for emptied bottles and the labor costs for cleaning put a heavy burden on public utilities.

Also, although these synthetic resin bottles can be manufactured by easy means such as blow forming, the strength thereof is not enough for transportation on a motor vehicle or other transportation means accompanied by heavy vibrations and for piled-up display in a store.

Furthermore, when the bottles are transported from a bottle manufacturer to a company which fills the bottles with juice or mineral water, the bottles take a lot of space, and the state is as if air is transported.

Therefore, the ratio of transportation costs to production costs is considerably high.

However, there has been proposed no invention of a new excellent mold for manufacturing bellows of the vessel and each fold forming the bellows and a manufacturing method therefor.

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