Device and method for loading the input unit of a letter sorting system

A device for loading of a feeder of a letter sorting system, comprising:

• a mail singling device,
• a horizontally directed mail conveyor line with a supporting wall for transport of edgewise standing, flat mail pieces to the mail singling device, and a separating knife swiveling in and out of the transport direction for the support and transport of mail pieces to the mail singling device traveling and reversing again along linear guides,
• wherein at least a stack receiver located on a chassis, picking up the mail stack at any location with a stack base horizontally moveable in stack direction, beyond the chassis, one or two separating knives supporting the stack, moveable along the stack base and swiveling in and out of the stack receiver and an additional supporting wall, whereby the dimensions and the height of the stack receiver are designed in such a way that the stack base is moveable with the separating knife to the stack receiver on the stack conveyor line to the separating knife of the feeder and that in the following, after the separating knife of the feeder has swiveled out, moved and swiveled in again behind the mail stack located on the stack base, and that the separating knives of the stack receiver are swiveled out, the stack base can be withdrawn under the mail pieces from the area of the mail conveyor line and is moveable into the loading position with the separating knives of the stack receiver.