Structure of fluid container and method and apparatus for producing the fluid container

Abstract

A fluid container for packing a product includes a check valve for each container member. A bonding structure of check-valves to a fluid container and a production method and apparatus of fluid container are disclosed in detail where the check valve is capable of reliably keeping the expansion of the fluid container without any fluid leakage after inflating the fluid container. As the check-valve is bonded to only one of thermoplastic container films, both films of the check-valve are fixed to one of the container films, thereby preventing the reverse flow by tightly closing the check valve. The manufacturing apparatus includes an up-down roller controller which precisely positions the films to form the check valve. The manufacturing apparatus can produce the fluid container with high reliability by having a belt conveyor specially designed for cooling down the heat sealed films before separating from the belt conveyor without damage.

Description

FIELD OF THE INVENTION [0001] This invention relates to a structure of a fluid container and a manufacturing apparatus for producing the fluid container, and more particularly, to a bonding structure of the check valve capable of reliably keeping the expansion of the fluid container without any fluid leakage after inflating the fluid container and to the production method and apparatus to produce the fluid container incorporating the bonding structure of the check valves. BACKGROUND OF THE INVENTION [0002] A styroform packing material has been used for a long time for packing commodity and industrial products. Although the styroform package material has a merit such as a good thermal insulation performance, it has also various disadvantages: recycling the styroform is not possible, soot is produced when it burns, a flake or chip comes off when it is snagged because of it's brittleness, an expensive mold is needed for its production, and a relatively large warehouse is necessary to s...

AI Technical Summary

Benefits of technology

"The present invention provides a structure and method for producing fluid containers with high efficiency and reliability. Specifically, the invention includes a unique structure of a fluid container with an in-line check valve that can keep the expansion of the container without any fluid leakage after inflating it. The check valve is bonded to the container film to tightly close it when a reverse flow of fluid is about to occur, thereby preventing the reverse flow. The method and apparatus for producing the fluid container involve sandwiching the check valve films between the container films and bonding them together to create a plurality of container members with the check valve positioned at each input. The invention also includes a roller controller for adjusting the position of the check valve film and a belt conveyor for forming heat seal portions without creases, resulting in high-reliability and low-cost fluid containers."

Problems solved by technology

Although the styroform package material has a merit such as a good thermal insulation performance, it has also various disadvantages: recycling the styroform is not possible, soot is produced when it burns, a flake or chip comes off when it is snagged because of it's brittleness, an expensive mold is needed for its production, and a relatively large warehouse is necessary to store it.

Thirdly, the fluid container does not produce a chip or dust which has adverse effect on precision products.

This is a serious problem of the fluid containers in the conventional technology.

There is another problem which is involved in the production of the fluid containers.

This problem is related to the installation of the check valves: it is not easy to accurately attach the check valve to each container member of the fluid container film.

Therefore, the inaccurate installation of the check valve also sometimes causes a leakage problem.

However, since there are leakage and other problems in the fluid containers as described above, it is necessary to improve the performance of check valves in the fluid container and the production efficiency for producing the fluid containers to reduce the overall cost.

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