| 摘要 |
<p>PURPOSE:To permit a proper and easy opening by method wherein the string or rod of a strong tensile force is incorporated between the adhesively joined faces of the opening part of a paper pack container, the end part thereof is left exposed outwardly of the container and it is made useful as a pull part. CONSTITUTION:A string or rod 4 made of the synthetic fiber consisting of polyethylene terephthalate is incorporated between the adhesively joined faces 3 of the opening part 2 of a container 1, simultaneously with its contents poured thereinto and the container closed adhesively and the end part 5 of the string or rod is left exposed outwardly of the container 1 as a pull part. If the diameter of the string or rod is excessively large, the adhesively joined faces 3 are weak to cause incomplete sealing and, therefore, the diameter not above 1/3 width of the sealing part is preferable. If the aforesaid diameter is excessively small, it tends to be cut off upon opening and becomes useless and, therefore, the aforesaid diameter is similarly desirable. This method provides the end 5 of the string or rod 4 as a pull part and, by pulling it up, the adhesively joined faces 3 of the paper pack container 1 can be easily opened apart.</p> |
