The cam lifter feed mechanism of the invention comprises an inclined endless chain conveyor carried by an upper framework and a lesser framework including a multiplicity of lug-like lumber engaging means mounted at intervals on the endless chains of the conveyor, a driven shaft journaled for roatation in the upper framework including sprockets operatively engaged with endless chains of the conveyor, a plurality of cam lifters mounted on the shaft at opposite terminal sides of the endless chain conveyor including outwardly projecting hook-like foot portions being operable to engage the lowermost terminal edge of lumber continued the conveyor by the lug-like engaging means and to carry the lumber over the shaft to a spot of discharge, a downwardly inclined discharge feed guide means mounted on the upper framework between cam lifters. The low Reciprocating Vacuum Pumps platform having a pair of other hopper developing downwardly willing aspect frame members getting operable to steer lumber toward the countless string conveyor, means installation the countless chain conveyor distally near the lowermost end of the downwardly willing side framework member. The hook-like foot portions each have got a leading advantage downwardly likely with regards to the radii of the cam lifter at an angle coincident with the angle of inclination of the endless chain conveyor, the foot portion providing upwardly from the industry leading right into a hook developing part.