A roller gin capable of producing lint substantially free of linter fibers utilizes a wall construction to prevent the seed from contacting the ginning roll, a ginning slot in the wall through which an airflow draws the fibers. A ginning roll adjacent the slot on the opposite side of the wall grasps the fibers along a nip point formed between the roll and wall proximal the slot and urges the fibers along a path on one side of the wall while the seeds are urged along a divergent path on the other side of the wall.