| 摘要 |
PURPOSE:To prevent generation of mispositioning of end seal by a method wherein a sealing bar of an end sealing device, while the device is in sealing operation, operates at peripheral speed the same as sending speed of packing film and, while in non- operation, undergoes quick sending to return to a sealing operation starting position and wait there. CONSTITUTION:In an end sealing device, a servo-motor 87 is driven, while a recessed part 842 of a sealing bar 84 and 84a is moving from a sealing starting position A-A and A'-A' to an sealing ending position B-B and B'-B' in direction Z and Z', to make the peripheral speed of the outer peripheral surface of the recessed part the same as the speed of packing film, and when the sealing bar 84 and 84a returns from a sealing finishing position to the sealing starting position, to return the bar 84 and 84a quickly. When the recessed part is at the sealing starting position, the servo-motor is stopped and the sealing bar is waiting. When an operation starting command based on an original point signal which is sent from an original point sensor to a controller for whole of a packing machine is sent from the controller to the servo-motor 87, the servo-motor rotates to do end sealing operation operation by lateral sealing bar 84 and 84a. |
