A draper platform (100) for mounting on a feederhouse of an agricultural combine comprises an elongate reciprocating knife assembly (140) at a forward edge of the draper platform (100). A left side endless belt conveyor (116) is disposed behind the reciprocating knife assembly on the left side of the draper platform (100) and a right side endless belt conveyor (120) is disposed behind the elongate reciprocating knife assembly (140) on the right side of the draper platform (100). A center endless belt conveyor (118) carries the cut crop material rearward towards a central rear aperture (138) in the frame (101). A conveyor drum (136) is mounted above and in front of the central rear aperture (138). Conveyor members (150, 152, 164, 165) are located at crop transition zones (154, 156) between the left side endless belt conveyor (116), and the conveyor drum (136), and between the right side endless belt conveyor (120) and the conveyor drum (136).
