Draper head with retrofitting interface to an air conveying system

A draper head (2) for attachment to a harvesting machine (4), the draper head (2) comprising:

• a frame (6), a blade bar (8) disposed at the frame (6), a blade angle construction (10) configured to hold the blade bar (8), belt conveyor devices (12) disposed at the frame (6) and configured to convey the cut stalk material away, a support device (14) configured to support the belt conveyor devices (12), and drive devices (16) configured to drive the blade bar (8) and the belt conveyor devices (12);
• a retrofitting interface (18) formed above the blade angle construction (10) and providing an installation space (20) configured to selectively releasably install an angle profile sheet (50) or a cover profile sheet (26) via identical connection points (22);
• a cavity (24) located beneath the angle profile sheet (50) or the cover profile sheet (26);
• wherein the cavity (24), when using the angle profile sheet (50), serves as an air duct, the angle profile sheet (50) delimiting air outlet openings (52), which are arranged and configured to direct an air flow (60) exiting the air duct through the air outlet openings (52) in a direction toward the upward-facing surface of the belt conveyor devices (12), into an overhead space, and/or in an upward direction;
• wherein the cavity (24) is closed when using the cover profile sheet (26);
• wherein the blade angle construction (10) has a cross member (28) connected to at least one support arm (30), wherein the at least one support arm (30) is connected to the frame (6), wherein the cross member (28) has an end wall (32) pointing with a flat side thereof in a working direction of the draper head (2);
• wherein the end wall (32) is folded over at an upper end thereof opposite to a working direction of the draper head (2) and extends so far rearwardly that the end wall (32) overlaps a front edge (34) of an upper run of the respective belt conveyor device (12) circulating behind the end wall (32);
• wherein a mounting plate (36) is fastened to a front side of the end wall (32), wherein the mounting plate (36) extends in an at least approximately horizontal direction and the blade bar (8) is fixed to a front end of the mounting plate (36):
• wherein the end wall (32) comprises one or more outlet openings (38) formed above the mounting plate (36);
• wherein one or more longitudinal tubes (40) inserted into the one or more outlet openings (38), respectively, wherein the one or more longitudinal tubes (40) extend from a rear of the frame (6) to the end wall (32);
• and
• wherein a part of the end wall (32) located above the mounting plate (36) and a side of the mounting plate (36) facing upwardly delimit spatially a region of the retrofitting interface (18).