| 摘要 |
<p>PLASTIC SWINGBOARD A freight retaining device adapted to be positioned between opposite, vertical walls of a freight containing compartment, such as a railroad freight car. The device is in the form of a swingboard fabricated from a pair of plastic sheets each having a plurality of longitudinally disposed and laterally spaced ribs separated by integral webs. The sheets are joined in a abutting relationship such that the ribs project outwardly on opposite sides of the joined sheets while the sheet outer edges are fused to define a unitary member. The opposite, longitudinal ends of the unitary member are provided with means for releasably engaging supporting rails carried by the opposite, vertical walls of the freight containing compartment.</p> |
