| 摘要 |
PROBLEM TO BE SOLVED: To easily perform a maintenance operation such as cleaning of a longitudinal sealing device.SOLUTION: A seal unit 42 equipped with delivering rollers 12 and 12 and seal rollers 14 and 14 is arranged on a movable frame 36 pivoted turnably on this side of a back face machine frame 16. The seal unit 42 is positionally set so that the overlapping part f of a film F extending downward from a gap S of conveying beds 10 and 10 can be pinched by the delivering rollers and the seal rollers 14 and 14 under a condition that the movable frame 36 is held at a seal position P. By releasing engagement of locking means by a switching mechanism 70 and inclining the movable frame 36 toward a maintenance position M, the seal unit 42 takes an attitude easily performing the maintenance operation in which the delivering rollers 12 and 12 and the upper faces of the seal rollers 14 and 14 are inclined to face this side. |
