| abstract |
A cover assembly may include a tray assembly frame, a first cover supported by the tray assembly frame, the first cover extending in a first plane and defining one or more first openings; a second cover supported by the tray assembly frame, the second cover extending in a second plane and defining one or more second openings, wherein the first and second planes are different planes, and wherein the second cover is disposed above the first cover. The cover assembly may include one or more tray holders, each tray holder being configured to hold at least one tray in an upright orientation, wherein each tray holder is moveable between an open position and a closed position, the tray holders being accessible for loading or removing the trays in the open position, and the tray holders being positioned beneath the first and second covers in the closed position. |