its sole plated and bullnose sloping rearwardly from the center to assist lateral flow of the hot asphalt material in front of the main screed and to the front of screed extenders the bullnose for the sole plate is separate from the sole plate and consists of a pair of bullnose pieces the construction is such that adjustment of the controlled dishing and warping of the sole plate can be more easily performed application_number US 84718192 A description the general layout of an asphalt paving machine with a floating main screed equipped with adjustable screed extenders which is towed by a tractor is shown in fig1 hot asphalt paving material is fed by one or two conveyors from a front hopper on the tractor to an auger carried by the tractor between the tractor and the screed the main screed unit has a pair of side by side frame sections 10 11 each comprising an outer generally triangular side plate 12 an inner gusset plate 13 a deck plate 14 and a front moldboard 15 each deck plate 14 has an upturned front flange 14a which is partly overlapped by the respective moldboard 15 and each moldboard has a rearwardly extending top flange 15a which overlaps a flat upper edge portion of the respective side plate 12 the side plates 12 and gusset plates 13 are welded in position to the deck plates 14.