| 摘要 |
PURPOSE:To prevent a blind section, which roller brushes do not reach, by a method wherein the lower half sections of a plurality of the roller brushes are dipped into a washing, the roller brushes are disposed in parallel, reversely rotated mutually, and reciprocated in the direction of a shaft, and the upper sections of the roller brushes are abutted against the underside of a printed board rectilinearly propagated and passed in the direction rectilinear to the direction of the shaft and the underside of the printed board is washed. CONSTITUTION:A printed board 9 is moved forward in the direction of the arrow A by a carrying means, and passed on roller brushes 1. The lower half sections of the four roller brushes 1 of implanted brushes are dipped into a washing 2, and the four roller brushes 1 are arranged in parallel at regular intervals and turned alternately in the opposite directions as shown in the arrows B, C in the figure, and the shaft is reciprocated axially at fixed distances. Blind sections, which the brush does not reach, are generated by the revolution of one direction on the top face of the printed board having irregularities, but the blind sections are washed by the next roller brush 1 in the reverse rotation, the process is repeated by the four roller brushes to attain perfection, the shafts are reciprocated, and the corner sections of a wall surface in the direction rectangular to the progressive direction are also washed positively. |
