Abstract: The outer link panel of one or more links carrying the scraper bars of a scraper-chain conveyor is replaced with a link panel having a projection extending from the chain to the guide channel wall. These projections then travel with the chain and clear the space between the chain and guide channel wall of spilled loose material lodged therein.

Abstract: A height control mechanism for a strike-off plate of an asphalt paver screed assembly is disclosed. The screed assembly is pivotally connected to a pair of tow arms of an asphalt paver and has at least one main screed unit and at least one screed extension unit mounted in front of the main screed unit. The screed extension is laterally movable beyond one end of the main screed unit. The screed assembly also has an adjustment mechanism for adjusting the pitch angle of the screeds relative to the ground. The height control mechanism includes a support mechanism adapted to mount the strike-off plate in front of the main screed unit at a position ahead of the screed extension unit. The height control mechanism also includes a linkage arrangement adapted to automatically control the height of the strike-off plate upon the adjustment of the pitch angle of the screeds.