Patent ID: 7032486

Claim:
A mill saw comprising (a) a saw frame comprising parallel saw blades cutting only in a stroke direction, (b) a slider-crank drive imparting cutting strokes to the saw frame at a given frequency, (c) a feed conveyor for feeding stock to be cut by the saw blades in a feed direction, (1) the saw blades being cantilevered in the feed direction, and (2) the saw frame moving at a cutting speed relative to the stock during the cutting strokes, said slider crank drive causing said saw frame cutting speed to have a sinusoidal velocity profile, (d) at least one motor separated from the slider-crank drive for intermittently driving the feed conveyor conveying step-by-conveying step during the cutting strokes of the saw frame in dependence on the cutting speed, (e) a controlling system connected to the at least one motor, the controlling system comprising (1) a stored computer control program for the conveying steps, said program controlling a speed of the feed conveyor to correlate with the sinusoidal velocity profile of the saw frame cutting speed during the cutting strokes of the saw frame, and (f) a signal transmitter connected to the controlling system, the signal transmitter transmitting an electronic signal indicating a preset position of rotation of the slider-crank drive to the controlling system.