| 摘要 |
PURPOSE:To perform welding processing favorable in a finish state even when a sheet feed speed is increased and a heating time is made short. CONSTITUTION:Front stage heating units 71A, 71B and rear stage heating units 72A, 72B are provided along the feed route 6 of sheets S1, S2. The temps. of the heating units 71A, 71B, 72A, 72B of the respective stages can be separately set. The set temps. of the front stage heating units 71A, 71B are made slightly low and the set temps. of the rear stage heating units 72A, 72B are made higher than those of the units 71A, 71B. |
