Stacker device for flat items

A stacker device comprising:

• a receiving plate onto which flat items proceed in a longitudinal movement direction between an upstream end and a downstream end of said receiving plate;
• an alignment wall proceeding along said longitudinal movement direction, said alignment wall being attached to and extending upwardly from said receiving plate;
• a stop wall situated at said downstream end of said receiving plate that stops movement of said flat items and thereby causes said flat items to accumulate in a stack on said receiving plate, adjacent to said alignment wall;
• said alignment wall having at least two steps therein that are stepped individually toward said flat items, each of said steps limiting an accumulated height of said flat items in said stack;
• and
• said receiving plate being situated downstream of an upstream device, and comprising a telescoping leg situated at said downstream end of said receiving plate that provides support to said receiving plate, said telescoping leg having an extensible foot and an extensible head that are connected with the receiving plate so as to be detachable, said extensible head being situated at the downstream end of the receiving plate and having openings for a rail carrier on which said stop wall is installed, said rail carrier being displaceable in said longitudinal movement direction, and said receiving plate comprising a fastener at said upstream end adapted to fasten said receiving plate to said upstream device.