Stone trap seal

In an infeed housing attachable on a first inlet end to a harvesting attachment and on a second outlet end to a combine having two opposing sidewalls connecting a top surface and a bottom surface thereby defining a flow passage for crop material, the bottom surface further having a trapdoor mounted thereto moveable between a first closed position and a second opened position and cooperative with the bottom surface and a foreign object detecting system to selectively create a discontinuity in the flow passage for the ejection of detected foreign objects, the improvement comprising:

• sealing means formed into each of the opposing sidewalls and cooperative with the trapdoor in the closed position to prevent the loss of crop material therebetween during the operation of the combine, the sealing means further comprising an elongate indentation in each of the opposing sidewalls having an inner surface and an outer surface, the inner surface being of predetermined radius nearest the trapdoor, said trapdoor having first and second opposing edges adjacent the opposing sidewalls, the distance between said opposing indentations being less than the distance between said first and second edges of said trapdoor, so that both said first and second edges of said trapdoor engage the respective said indentation when said trapdoor is moved to said first closed position to seal said trapdoor and prevent the escape of crop material between said first and second edges and the respective said sidewall during the passage of crop material over said bottom surface.