Abstract: A mail delivery system including, a plurality of portable trays each tray having a bottom, an open top, at least two rigid oppositely disposed sides affixed to the bottom, at least one open side, a gate member to open and close the open side. Separators removably attached to at least the bottom. Regularly spaced slots within the bottom to receive the separators. At least one set of handle members to assist in the transportation of the portable tray and to assist in the withdrawal or insertion of the portable tray from holder members arranged to receive the tray. A tray case containing a plurality of holder members to removably receive a plurality of the portable trays, members for raising and lowering the case and the trays from a loading position to a sorting position. A transport member containing a plurality of holder members to receive the portable trays and transport the portable trays from the tray cases to a tray rack in a delivery vehicle.

Abstract: A mail delivery system including, a plurality of portable trays each tray having a bottom, an open top, at least two rigid oppositely disposed sides affixed to the bottom, at least one open side, a gate member to open and close the open side. Separators removably attached to at least the bottom. Regularly spaced slots within the bottom to receive the separators. At least one set of handle members to assist in the transportation of the portable tray and to assist in the withdrawal or insertion of the portable tray from holder members arranged to receive the tray. A tray case containing a plurality of holder members to removably receive a plurality of the portable trays, members for raising and lowering the case and the trays from a loading position to a sorting position. A transport member containing a plurality of holder members to receive the portable trays and transport the portable trays from the tray cases to a tray rack in a delivery vehicle.