PURPOSE: To automatically treat both the first and second side surfaces of an article to be treated as desired by first treating the first surface, then turning the article around its central axis and applying second treating the second surface.

CONSTITUTION: A track 5 is raised whenever a leadframe 1 is fed out, and a vacant rack 5a is fed to a loader 4. The leadframe 1 is intermittently fed at 10 by a pawl 11, a treating solution is injected from a nozzle 12a on the upper surface during stop and coated. A guide 9 is slided, engaged with a groove 20 on its extension, and the leadframe 1 is eventually completely contained in a drum 16. At this time, the drum 16 is rotated at 180°. The leadframe 1 is pushed by the following frame, intermittently fed at 10 by the pawl 11, the solution is injected from the nozzle 13a and coated. The coated frames 1 are contained one by one in a fence shape in a vacant rack 5a. The solution can be automatically coated on both side surfaces of the frame, a conveyor line can be formed rectiflinearly by the adoption of an inverting drum to reduce the occupying space.