Method for gas replacement of container and apparatus therefor

Abstract

Provided are a method for gas replacement of a container capable of obtaining a high replacement effect using a smaller amount of an inert gas, without spilling foam or content liquid at the time of gas replacement in a head space of the container, and an apparatus therefor.  A bottle nozzle (10), which is arranged in a range wherein it does not interfere with a capper head (CH) introduces nitrogen gas from above into a mouth of bottle (B) which has been conveyed, and a lateral-side bottle nozzle (20) arranged to avoid interference with the bottle (B) and the capper head (CH) introduces nitrogen gas from an obliquely upward direction into the mouth of the bottle (B) until just before the bottle (B) is fitted with the cap (C); while a cap nozzle (30), which is arranged in a range wherein it does not interfere with the bottle (B) introduces nitrogen gas from below into an inside of the cap (C) which has been conveyed, and a lateral-side cap nozzle (40) arranged to avoid interference with the bottle (B) and the capper head (CH) introduces nitrogen from an obliquely downward direction into the inside of the cap (C) until just before the cap (C) is fitted with the bottle (B).

Description

technical field [0001] The invention relates to a gas replacement method and device for a container, in particular to the ability to replace gas in the head space of the container without blowing bubbles or liquid in the container, and to obtain a gas replacement with a small amount of inert gas. A gas replacement method and device for a container with a high replacement effect. Background technique [0002] When a large amount of air remains in the head space of the bottle mouth, the content may be oxidized by oxygen in the air to deteriorate functional components such as taste and flavor. Therefore, after filling the PET bottle with the content, it is necessary to replace the headspace of the bottle opening with an inert gas such as nitrogen before the sealing process by the cap. [0003] The bottle filled with the content is conveyed by the turret. On the other hand, the cap is also conveyed by the turret in the manner of being held by the capping head. When the axis of ...

AI Technical Summary

Problems solved by technology

However, in reality, since the bottle is close to the cap, there is a limit to the relative position where the cap nozzle can be close to the cap.

On the other hand, the same is true for bottle nozzles. Since the capping head is close to the bottle, there is a limit to the relative position where the bottle nozzle can approach the bottle.

In other words, there is an area where the "gas blowing nozzle" cannot approach the cap and the nozzle of the bottle

The air reflows into the inside of the cap and the head space of the neck portion replaced by the inert gas due to the area where the nozzle cannot be approached, thereby reducing the replacement rate of the inside of the cap and the head space of the neck portion by the inert gas

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