Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With means applying wave energy or electrical energy...
Patent
1982-10-25
1985-03-26
Gallagher, John J.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With means applying wave energy or electrical energy...
1562733, 1563099, 156320, 156322, 1563244, 1563809, 156499, 156567, 493 87, 493133, B27G 1102, B32B 3124
Patent
active
045071683
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for mounting a faucet on a paper container and apparatus therefor, which container has recently been used widely as a container for milk, juice, liquor, or the like. The faucet serves to pour out the contents in the container.
BACKGROUND ART
Paper containers have heretofore been used for packing milk and juices, and recently, even for liquors, and their uses are extending now. When the contents in a paper container are poured out, it is necessary to peel or cut the bonded portion of the paper container. Therefore, the opening operation of a paper container is rather difficult and troublesome, and the pouring out of the contents is not easy. In addition, it is almost impossible to maintain its sealing effect after the container is opened. Thus, it is required, from the viewpoints of hygiene and preservation, to improve the containers of this type.
In order to eliminate these disadvantages of the paper containers and taking the facts into consideration that the paper containers can be fitted with faucets and the surfaces of them are coated with a thermoplastic resin film to improve waterproofness, the present invention intends to provide a method and apparatus for fixing a faucet made of synthetic resin to the thermoplastic resin coating, thereby improving the easy-opening property and maintaining the sealing property after a paper container is opened.
DISCLOSURE OF INVENTION
The present invention is characterized in that a predetermined portion of a paper container, where a faucet is to be mounted, and the end face of a faucet made of a synthetic resin are heated and the heated areas are pressed against each other for adhesion. The adhesion of the synthetic resin faucet to the paper container is accomplished by utilizing the property of the thermoplastic resin coating on the paper container which becomes soft and molten by heating.
The thermoplastic resin film on the paper container may be of any type material. However, polyethylene resins have usually been used, and other polypropylenes, modified polyesters, waxes, and the like may also be used.
Further, as synthetic resin for faucets, any resin which is excellent in adhesion to the thermoplastic resin coating on paper container can be used. For example, polyethylenes, polypropylenes and modified polyesters are used. If desired, an adhesive can be used between the container and the faucet.
Furthermore, the present invention is characterized in that a paper container retaining mechanism to hold a paper container and a faucet retaining mechanism to hold a faucet are provided and the paper container and the faucet are heated at adhesive portions thereof by a heater while they are held by the respective retaining mechanisms. These mechanisms are caused to approach to each other and then the paper container and the faucet are pressed together to accomplish the adhesion of them.
The paper containers which are widely used are of an upright rectangular parallelepiped and the top portion of which comprises slant surfaces on both upper sides. When it is intended to a mount a faucet for pouring out the contents on a paper container, its mounting position is naturally set to one of the slant surfaces. However, when the paper container having such a shape is stood upright and the slant surface to be applied with a faucet is heated, unevenness of heating is caused to occur between the upper portion and the lower portion of the slant surface because the lower portion of the slant surface is in contact with the liquid contents or the lower portion is quite near to the liquid surface. Therefore, complete adhesion of the faucet cannot be attained.
Accordingly, in the present invention, the paper container is provided with slant surfaces in its upper portion and a faucet is mounted on this slant surface. The paper container is so inclined that the above slant surface becomes horizontal and the distance between the slant surface and the liquid level of the contents is made even. In this state, the portion of the
REFERENCES:
patent: 2972184 (1961-02-01), Andrew
patent: 3498868 (1970-03-01), Saumsiegle
patent: 3883369 (1975-05-01), Badger et al.
patent: 4094725 (1978-06-01), Takeda et al.
Gallagher John J.
Shibuya Kogyo Co. Ltd.
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