Rack for biological testing trays

Claim 1

A rack for a plurality of biological testing trays comprising a relatively flat member having a relatively small height, said member having at least two bays extending in opposite directions, each of said two bays being separated by an isthmus portion of said flat member, each of said bays having a general rectangular configuration, each of said bays having upstanding side walls and an upstanding end wall, said side walls and said end wall having inwardly extending shelves at substantially the bottom portion thereof, said shelves being adapted to retain said trays, said side walls having protrusions spaced above said shelf whereby an outwardly extending flange on said tray is retained between said shelf and said protrusions, said end wall having a protrusion with an upstanding wall inclined inwardly from substantially the bottom to substantially the top of said rack for abutment of said outwardly extending flange on said tray, said side walls having depressions in the upper edge portions for finger tip insertion, said rack being thermoformed whereby the top edge of the walls of each bay is connected to the top edge of the walls of each bay adjacent thereto by relatively thin plastic material and the remainder of the walls are spaced apart to form a general hollow shape for nesting together of a plurality of said racks.