An ink jet printhead includes a drop generator having an attached orifice structure forming a jet array adapted to use ink jet fluids with a charge device disposed opposite the jet array forming a gap. The lower layer has portions that are open onto the upper layer. The inner cylinder is spaced apart from the outer cylinder to define a gap. The upright portion of the seat support member extends from the seat offset with respect to a center of gravity of the seat for permitting rocking of the seat.