Rotary board treating apparatus

In a rotary board treating apparatus comprising a center shaft, a frame member rotatably supported by said center shaft for the rotation about the shaft, a plurality of upstanding guide beams secured to the frame, a plurality of clamps for holding boards and slidably carried by said guide beams, and means for vertically moving said clamps on said guide beams, the improvement wherein said means for vertically moving said clamps are individually actuatable, said guide beams and said clamps being circumferentially equi-spaced relative to said apparatus and defining a predetermined angle relative to each other, said clamps including a radially extending support arm, with said arm slidably engaging with said upstanding guide beam for the vertical movement thereon, said apparatus further comprising an annular track concentrically supported by said center shaft, with said radially extending arm having at its inner end a member engageable with said annular track, and said annular track having a plurality of circumferentially equi-spaced notches defining said predetermined angle, and said means for vertically moving the clamps being positioned vertically in alignment with said notches, and said apparatus still further comprising means for intermittently rotating said frame member, about said center shaft through said angle at each tie.