Abstract: A continuous motion, in-line stacker for positioning products, one atop the other, as the products are being conveyed from a product supply point to a high-speed wrapping machine. The stacker assembly comprises a supply conveyor which is in longitudinal alignment with a downstream stacking conveyor and a discharge conveyor. The stacking conveyor has an endless belt or chain which is trained over a series of idler rollers or sprockets so as to form an ascending flight, a horizontal flight, a descending flight and a return flight. Secured to the stacking conveyor's belt or chain at predetermined spacings therealong are a series of product platens of predetermined differing heights. In the zone of the horizontal flight are a series of vertically arranged, horizontally extending deadplates whose vertical spacings correspond to the heights of the product platens.