(under subclass 368.1) Device comprising an auxiliary closure member specially adapted to be temporarily installed across a door opening of a freight vehicle so that bulk grain, small packages, boxes or other granular bulk material may be retained within the vehicle without leakage.
(1) Note. Generally, such inner load retaining doors also function to prevent the dry, flowable material within a railway box car from coming into contact with the permanent outside sliding door of the car.
