| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for attaching a mouth plug which can be applied to both inside mounting type and outside mounting type, each of which is mounted within the edge of a window hole for a pour port formed in a paper container body and which prevents cracks from being produced in a barrier film. SOLUTION: This device for mounting a mouth plug comprises a horn 30 to convert ultrasonic waves to longitudinal vibrations and a fixed anvil 32 opposed to the horn 30. An approximately circular groove is formed at the center of the anvil 32, and a vibration absorbing body 38 is provided at the center of the groove. A retracting anvil 34 is provided in the groove around the body 38 through a vertically movable holder 36. |
