Posting trays

Claim 1

A posting tray of open box formation comprising a longitudinally extending bottom with a centrally disposed downwardly extending first channel extending longitudinally thereof, said channel having vertically spaced legs with a transverse horizontal leg extending between said vertical legs, a second inner central channel disposed within said first channel with a horizontal leg extending between vertical legs with said second channel vertical legs being spaced inwardly of said first channel vertical legs and being secured at their lower edges to the transverse leg of said first channel, and pivot slots having elongated transverse horizontal (slots) slot portions disposed in said second inner channel horizontal leg and extending inwardly of said inner channel vertical legs, and (angular slots) vertical slot portions disposed in said inner channel vertical legs, and (said) angular slots intersecting said (horizontal slots) vertical slot portions and having lower upwardly converging portions, and middle portions with horizontal walls extending toward each other to form a catch thereon, at the intersection with said vertical slot portions (and upper portions with vertical walls entering said horizontal slots,) a plurality of rectangular tilt plates in said tray each having a pair of spaced rectangular tabs extending from its lower margin with each plate having its spaced tabs disposed transversely in said horizontal (slots) slot portions and said tabs having encircled openings therein positioned to be in transverse and longitudinal alignment with said angular slots and extending inwardly and outwardly thereof, to register therewith to permit said horizontal walls of said angular slots to extend into said openings to lock said plates therein when said plates are disposed angularly with a vertical plane.