| 摘要 |
PROBLEM TO BE SOLVED: To prevent diffusion of hot air in an oven chamber. SOLUTION: The hot air circulating device of a tenter oven is equipped with a first nozzle duct part 10a having a plurality of small chambers 10d arranged at a predetermined interval in the transfer direction of a film 3 to be stretched on the upper surface side of the film 3, a second nozzle duct part 10a' having a plurality of small chambers 10d' arranged at a predetermined interval in the transfer direction of a film 3 on the undersurface side of the film 3, a first suction duct part 20a having a plurality of individual chambers 20f interposed between the small chambers 10d and the suction duct part 20a, a second suction duct part 20a' having a plurality of individual chambers 20f' interposed between the small chambers 10d' and the suction duct part 20a' and a hot air circulating means for circulating hot air between the nozzle duct parts 10a and the suction duct part 20a as well as between the nozzle duct parts 10a' and the suction duct part 20a' so that the hot air ejected from the hot air blowoff nozzles 10e of the small chambers 10d and 10d' is sucked from the hot air suction holes of the small chambers 20f and 20f'. |
