The cam lifter feed mechanism of the invention comprises an inclined endless chain conveyor carried by an upper framework and a lower 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 greenhouse reducer lifters mounted on the shaft at opposite terminal sides of the endless chain conveyor including outwardly projecting hook-like foot portions getting operable to engage the lowermost terminal edge of lumber carried on the conveyor by the lug-like engaging means and also 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 lower construction having a set of other hopper forming downwardly likely aspect framework people being operable to guide lumber toward the unlimited chain conveyor, means mounting the endless string conveyor distally close to the lowermost end of the downwardly inclined aspect body member. The hook-like foot servings each have a leading advantage downwardly willing with respect to the radii of the cam lifter at an angle coincident with the angle of inclination of the limitless chain conveyor, the foot portion giving upwardly from the industry leading right into a connect forming part.