Bin for mail sorting apparatus

Claim 1

A mail transporting bin defining a plurality of parallel vertical mail holding slots each such slot being open at its top end, a normally closed pivotably movable door closing each slot along its bottom end, each movable door being pivotable about an axis substantially contiguous with one longitudinal edge thereof, and a lever rigidly affixed to one end of the door whereby said door may be held in a closed position, wherein the improvement comprises a tab integrally formed with the door at the end opposite the lever said tab having a first part extending at a right angle to the door and a second part extending from the first part and parallel to the door, resilient door opening and damping means including a spring engaging the second part of the tab for biasing the door toward an open position and for preventing noise and vibration upon the opening movement of the door, a plurality of rollers, a plurality of axles supporting the rollers the number of such axles being equal to the number of doors, and an arm attached to each such axle for holding one end of the spring in a fixed position.