| 摘要 |
PROBLEM TO BE SOLVED: To provide a package which has no possibility of breakage of the package and releasing of a synthetic resin wire sealing the package even when a large inner pressure is generated in the package. SOLUTION: The package is obtained as follows. A cylindrical body prepared by filling an article to be packaged in a film made into a cylindrical shape by welding the side end parts, is wrung at predetermined intervals from outside. A film bundling part 19 wherein the film in a region where the article to be packaged is pushed away is bundled, is pinched with the synthetic resin wires 16a and 16b, and an ultrasonic wave is applied on their both end parts to form a wire welded part 22 to seal it. At the same time, in a region where the synthetic resin wires 16a and 16b are brought into contact with the film bundling part 19, only on the end part side, a wire-film welded part 24 in which the synthetic resin wires 16a and 16b and the film are welded, is formed, and the film is melted and cut by the ultrasonic wave, and a film welded part 23 where the films are welded together is formed to prepare the package. COPYRIGHT: (C)2006,JPO&NCIPI
|
