| 摘要 |
A form-fill-seal machine includes a vertical sealing mechanism (2), a first film detection sensor, and a controller. The vertical sealing mechanism has a horn (21), an anvil (22), and an ultrasonic transmitter (21a). The vertical sealing mechanism sandwiches a cylindrical film conveyed by a pull-down belt mechanism, by the horn and the anvil, and seals the cylindrical film by applying ultrasonic vibrations to the cylindrical film. The first film detection sensor detects whether the cylindrical film is sandwiched by the horn and the anvil. The controller stops the ultrasonic transmitter in a circumstance in which the first film detection sensor detects that the cylindrical film is not sandwiched by the horn and the anvil. |
