| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic seal device of a paper container for liquid which allows a permissible value of a deviation amount to be large even when positions of a recessed part of an anvil and a packaging material step part are deviated, dispenses with a step positioning sensor, and is applicable to high-speed seal.SOLUTION: An ultrasonic seal device of a paper container for liquid that seals a packaging material step part formed with superimposition of a long cylindrical packaging material sealed by superimposing both ends in the width direction of a long packaging material with a horn and an anvil in a traversing direction, is constituted by an ultrasonic oscillator, the horn and the anvil. A recessed structure of the anvil 14 has a recessed structure in three stages (indicated by marks 31b, 32b, 33b), and the recess has a tapered shape. |
