Draper header with canvas to cutter bar seal

摘要

A header includes a cutter bar with a generally C-shaped beam supporting the sickle knife assembly across a front edge of the assembly. A draper assembly is carried on the cutter bar beam and includes a pair of rollers at right angles to the beam carrying a continuous draper canvas band around the rollers with the front edge of the canvas adjacent the cutter bar beam. The rollers and a support plate between the rollers for the upper run of the canvas are both recessed relative to the front edge of the canvas to leave a cantilever portion at the front edge of the canvas. This cantilever portion has an upper surface engaging an undersurface of a top plate of the beam to provide a seal inhibiting penetration of materials between the canvas and the cutter bar. A lower plate of the C-shaped beam is shorter in length than the upper plate and is inclined downwardly to allow the discharge of any materials from the area between the draper canvas and the cutter bar to prevent buildup.