Including slideably mounted barrier on load support:
(under subclass 313) Subject matter including path blocking means which (a) travels with and is attached to the load-underlying supporting surface by guide means which constrains the blocking movement of the means to rectilinear reciprocation in substantially a single primary direction and (b) moves bodily as a unit when repositioning to prevent or allow passage of the load.
SEE OR SEARCH CLASS
49, Movable or Removable Closures,
116+, for plural closures having opposed similar movement.
